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[tcpdump] / print-icmp6.c
1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 #ifndef lint
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.86 2008-02-05 19:36:13 guy Exp $";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #ifdef INET6
32
33 #include <tcpdump-stdinc.h>
34
35 #include <stdio.h>
36 #include <string.h>
37
38 #include "netdissect.h"
39 #include "addrtoname.h"
40 #include "extract.h"
41
42 #include "ip6.h"
43 #include "ipproto.h"
44
45 #include "udp.h"
46 #include "ah.h"
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 u_int8_t icmp6_type; /* type field */
82 u_int8_t icmp6_code; /* code field */
83 u_int16_t icmp6_cksum; /* checksum field */
84 union {
85 u_int32_t icmp6_un_data32[1]; /* type-specific field */
86 u_int16_t icmp6_un_data16[2]; /* type-specific field */
87 u_int8_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 u_int32_t nd_ra_reachable; /* reachable time */
209 u_int32_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 u_int8_t nd_opt_type;
275 u_int8_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 u_int8_t nd_opt_pi_type;
292 u_int8_t nd_opt_pi_len;
293 u_int8_t nd_opt_pi_prefix_len;
294 u_int8_t nd_opt_pi_flags_reserved;
295 u_int8_t nd_opt_pi_valid_time[4];
296 u_int8_t nd_opt_pi_preferred_time[4];
297 u_int8_t nd_opt_pi_reserved2[4];
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 u_int8_t nd_opt_rh_type;
307 u_int8_t nd_opt_rh_len;
308 u_int16_t nd_opt_rh_reserved1;
309 u_int32_t nd_opt_rh_reserved2;
310 /* followed by IP header and data */
311 };
312
313 struct nd_opt_mtu { /* MTU option */
314 u_int8_t nd_opt_mtu_type;
315 u_int8_t nd_opt_mtu_len;
316 u_int16_t nd_opt_mtu_reserved;
317 u_int32_t nd_opt_mtu_mtu;
318 };
319
320 struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
321 u_int8_t nd_opt_rdnss_type;
322 u_int8_t nd_opt_rdnss_len;
323 u_int16_t nd_opt_rdnss_reserved;
324 u_int32_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 u_int8_t nd_opt_dnssl_type;
330 u_int8_t nd_opt_dnssl_len;
331 u_int16_t nd_opt_dnssl_reserved;
332 u_int32_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 u_int8_t nd_opt_adv_type;
338 u_int8_t nd_opt_adv_len;
339 u_int16_t nd_opt_adv_reserved;
340 u_int32_t nd_opt_adv_interval;
341 };
342
343 struct nd_opt_homeagent_info { /* Home Agent info */
344 u_int8_t nd_opt_hai_type;
345 u_int8_t nd_opt_hai_len;
346 u_int16_t nd_opt_hai_reserved;
347 int16_t nd_opt_hai_preference;
348 u_int16_t nd_opt_hai_lifetime;
349 };
350
351 struct nd_opt_route_info { /* route info */
352 u_int8_t nd_opt_rti_type;
353 u_int8_t nd_opt_rti_len;
354 u_int8_t nd_opt_rti_prefixlen;
355 u_int8_t nd_opt_rti_flags;
356 u_int32_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 u_int8_t icmp6_nl_nonce[8];
367 int32_t icmp6_nl_ttl;
368 #if 0
369 u_int8_t icmp6_nl_len;
370 u_int8_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 u_int8_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 ((u_int16_t)htons(0x1))
399 #define NI_FQDN_FLAG_VALIDTTL ((u_int16_t)htons(0x1))
400
401 /* network endian */
402 #define NI_NODEADDR_FLAG_TRUNCATE ((u_int16_t)htons(0x1))
403 #define NI_NODEADDR_FLAG_ALL ((u_int16_t)htons(0x2))
404 #define NI_NODEADDR_FLAG_COMPAT ((u_int16_t)htons(0x4))
405 #define NI_NODEADDR_FLAG_LINKLOCAL ((u_int16_t)htons(0x8))
406 #define NI_NODEADDR_FLAG_SITELOCAL ((u_int16_t)htons(0x10))
407 #define NI_NODEADDR_FLAG_GLOBAL ((u_int16_t)htons(0x20))
408 #define NI_NODEADDR_FLAG_ANYCAST ((u_int16_t)htons(0x40)) /* just experimental. not in spec */
409
410 struct ni_reply_fqdn {
411 u_int32_t ni_fqdn_ttl; /* TTL */
412 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
413 u_int8_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 u_int8_t rr_segnum;
422 u_int8_t rr_flags;
423 u_int16_t rr_maxdelay;
424 u_int32_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 u_int8_t rpm_code;
439 u_int8_t rpm_len;
440 u_int8_t rpm_ordinal;
441 u_int8_t rpm_matchlen;
442 u_int8_t rpm_minlen;
443 u_int8_t rpm_maxlen;
444 u_int16_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 u_int8_t rpu_uselen;
455 u_int8_t rpu_keeplen;
456 u_int8_t rpu_ramask;
457 u_int8_t rpu_raflags;
458 u_int32_t rpu_vltime;
459 u_int32_t rpu_pltime;
460 u_int32_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 ((u_int32_t)htonl(0x80000000))
468 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((u_int32_t)htonl(0x40000000))
469
470 struct rr_result { /* router renumbering result message */
471 u_int16_t rrr_flags;
472 u_int8_t rrr_ordinal;
473 u_int8_t rrr_matchedlen;
474 u_int32_t rrr_ifid;
475 struct in6_addr rrr_prefix;
476 };
477 /* network endian */
478 #define ICMP6_RR_RESULT_FLAGS_OOB ((u_int16_t)htons(0x0002))
479 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((u_int16_t)htons(0x0001))
480
481 static const char *get_rtpref(u_int);
482 static const char *get_lifetime(u_int32_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 struct udphdr *get_upperlayer(netdissect_options *ndo, 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 /* inline the various RPL definitions */
498 #define ND_RPL_MESSAGE 0x9B
499
500 static const struct tok icmp6_type_values[] = {
501 { ICMP6_DST_UNREACH, "destination unreachable"},
502 { ICMP6_PACKET_TOO_BIG, "packet too big"},
503 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
504 { ICMP6_PARAM_PROB, "parameter problem"},
505 { ICMP6_ECHO_REQUEST, "echo request"},
506 { ICMP6_ECHO_REPLY, "echo reply"},
507 { MLD6_LISTENER_QUERY, "multicast listener query"},
508 { MLD6_LISTENER_REPORT, "multicast listener report"},
509 { MLD6_LISTENER_DONE, "multicast listener done"},
510 { ND_ROUTER_SOLICIT, "router solicitation"},
511 { ND_ROUTER_ADVERT, "router advertisement"},
512 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
513 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
514 { ND_REDIRECT, "redirect"},
515 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
516 { IND_SOLICIT, "inverse neighbor solicitation"},
517 { IND_ADVERT, "inverse neighbor advertisement"},
518 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
519 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
520 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
521 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
522 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
523 { ICMP6_WRUREQUEST, "who-are-you request"},
524 { ICMP6_WRUREPLY, "who-are-you reply"},
525 { ICMP6_NI_QUERY, "node information query"},
526 { ICMP6_NI_REPLY, "node information reply"},
527 { MLD6_MTRACE, "mtrace message"},
528 { MLD6_MTRACE_RESP, "mtrace response"},
529 { ND_RPL_MESSAGE, "RPL"},
530 { 0, NULL }
531 };
532
533 static const struct tok icmp6_dst_unreach_code_values[] = {
534 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
535 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
536 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
537 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
538 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
539 { 0, NULL }
540 };
541
542 static const struct tok icmp6_opt_pi_flag_values[] = {
543 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
544 { ND_OPT_PI_FLAG_AUTO, "auto" },
545 { ND_OPT_PI_FLAG_ROUTER, "router" },
546 { 0, NULL }
547 };
548
549 static const struct tok icmp6_opt_ra_flag_values[] = {
550 { ND_RA_FLAG_MANAGED, "managed" },
551 { ND_RA_FLAG_OTHER, "other stateful"},
552 { ND_RA_FLAG_HOME_AGENT, "home agent"},
553 { 0, NULL }
554 };
555
556 static const struct tok icmp6_nd_na_flag_values[] = {
557 { ND_NA_FLAG_ROUTER, "router" },
558 { ND_NA_FLAG_SOLICITED, "solicited" },
559 { ND_NA_FLAG_OVERRIDE, "override" },
560 { 0, NULL }
561 };
562
563
564 static const struct tok icmp6_opt_values[] = {
565 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
566 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
567 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
568 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
569 { ND_OPT_MTU, "mtu"},
570 { ND_OPT_RDNSS, "rdnss"},
571 { ND_OPT_DNSSL, "dnssl"},
572 { ND_OPT_ADVINTERVAL, "advertisement interval"},
573 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
574 { ND_OPT_ROUTE_INFO, "route info"},
575 { 0, NULL }
576 };
577
578 /* mldv2 report types */
579 static const struct tok mldv2report2str[] = {
580 { 1, "is_in" },
581 { 2, "is_ex" },
582 { 3, "to_in" },
583 { 4, "to_ex" },
584 { 5, "allow" },
585 { 6, "block" },
586 { 0, NULL }
587 };
588
589 static const char *
590 get_rtpref(u_int v)
591 {
592 static const char *rtpref_str[] = {
593 "medium", /* 00 */
594 "high", /* 01 */
595 "rsv", /* 10 */
596 "low" /* 11 */
597 };
598
599 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
600 }
601
602 static const char *
603 get_lifetime(u_int32_t v)
604 {
605 static char buf[20];
606
607 if (v == (u_int32_t)~0UL)
608 return "infinity";
609 else {
610 snprintf(buf, sizeof(buf), "%us", v);
611 return buf;
612 }
613 }
614
615 static void
616 print_lladdr(netdissect_options *ndo, const u_int8_t *p, size_t l)
617 {
618 const u_int8_t *ep, *q;
619
620 q = p;
621 ep = p + l;
622 while (l > 0 && q < ep) {
623 if (q > p)
624 ND_PRINT((ndo,":"));
625 ND_PRINT((ndo,"%02x", *q++));
626 l--;
627 }
628 }
629
630 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
631 u_int len)
632 {
633 return (nextproto6_cksum(ip6, (const u_int8_t *)(void *)icp, len,
634 IPPROTO_ICMPV6));
635 }
636
637 enum ND_RPL_CODE {
638 ND_RPL_DIS =0x00,
639 ND_RPL_DIO =0x01,
640 ND_RPL_DAO =0x02,
641 ND_RPL_DAO_ACK=0x03,
642 ND_RPL_SDIS =0x80,
643 ND_RPL_SDIO =0x81,
644 ND_RPL_SDAO =0x82,
645 ND_RPL_SDAO_ACK=0x83,
646 ND_RPL_SCC =0x8A,
647 };
648
649 enum ND_RPL_DIO_FLAGS {
650 ND_RPL_DIO_GROUNDED = 0x80,
651 ND_RPL_DIO_DATRIG = 0x40,
652 ND_RPL_DIO_DASUPPORT= 0x20,
653 ND_RPL_DIO_RES4 = 0x10,
654 ND_RPL_DIO_RES3 = 0x08,
655 ND_RPL_DIO_PRF_MASK = 0x07, /* 3-bit preference */
656 };
657
658 struct nd_rpl_dio {
659 u_int8_t rpl_flags;
660 u_int8_t rpl_seq;
661 u_int8_t rpl_instanceid;
662 u_int8_t rpl_dagrank;
663 u_int8_t rpl_dagid[16];
664 };
665
666 static void
667 rpl_print(netdissect_options *ndo,
668 const struct icmp6_hdr *hdr,
669 const u_char *bp, u_int length _U_)
670 {
671 struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
672 int secured = hdr->icmp6_code & 0x80;
673 int basecode= hdr->icmp6_code & 0x7f;
674
675 ND_TCHECK(dio->rpl_dagid);
676
677 if(secured) {
678 ND_PRINT((ndo, ", (SEC)"));
679 } else {
680 ND_PRINT((ndo, ", (CLR)"));
681 }
682
683 switch(basecode) {
684 case ND_RPL_DIS:
685 ND_PRINT((ndo, "DODAG Information Solicitation"));
686 if(ndo->ndo_vflag) {
687 }
688 break;
689 case ND_RPL_DIO:
690 ND_PRINT((ndo, "DODAG Information Object"));
691 if(ndo->ndo_vflag) {
692 char dagid[65];
693 char *d = dagid;
694 int i;
695 for(i=0;i<16;i++) {
696 if(isprint(dio->rpl_dagid[i])) {
697 *d++ = dio->rpl_dagid[i];
698 } else {
699 int cnt=snprintf(d,4,"0x%02x",
700 dio->rpl_dagid[i]);
701 d += cnt;
702 }
703 }
704 *d++ = '\0';
705 ND_PRINT((ndo, " [seq:%u,instance:%u,rank:%u,dagid:%s]",
706 dio->rpl_seq,
707 dio->rpl_instanceid,
708 dio->rpl_dagrank,
709 dagid));
710 }
711 break;
712 case ND_RPL_DAO:
713 ND_PRINT((ndo, "Destination Advertisement Object"));
714 if(ndo->ndo_vflag) {
715 }
716 break;
717 case ND_RPL_DAO_ACK:
718 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
719 if(ndo->ndo_vflag) {
720 }
721 break;
722 default:
723 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
724 break;
725 }
726 return;
727 trunc:
728 ND_PRINT((ndo," [|truncated]"));
729 return;
730
731 }
732
733
734 void
735 icmp6_print(netdissect_options *ndo,
736 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
737 {
738 const struct icmp6_hdr *dp;
739 const struct ip6_hdr *ip;
740 const struct ip6_hdr *oip;
741 const struct udphdr *ouh;
742 int dport;
743 const u_char *ep;
744 u_int prot;
745
746 dp = (struct icmp6_hdr *)bp;
747 ip = (struct ip6_hdr *)bp2;
748 oip = (struct ip6_hdr *)(dp + 1);
749 /* 'ep' points to the end of available data. */
750 ep = ndo->ndo_snapend;
751
752 ND_TCHECK(dp->icmp6_cksum);
753
754 if (ndo->ndo_vflag && !fragmented) {
755 u_int16_t sum, udp_sum;
756
757 if (ND_TTEST2(bp[0], length)) {
758 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
759 sum = icmp6_cksum(ip, dp, length);
760 if (sum != 0)
761 (void)ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
762 udp_sum,
763 in_cksum_shouldbe(udp_sum, sum)));
764 else
765 (void)ND_PRINT((ndo,"[icmp6 sum ok] "));
766 }
767 }
768
769 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)));
770
771 /* display cosmetics: print the packet length for printer that use the vflag now */
772 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
773 dp->icmp6_type == ND_ROUTER_ADVERT ||
774 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
775 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
776 dp->icmp6_type == ND_REDIRECT ||
777 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
778 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
779 ND_PRINT((ndo,", length %u", length));
780
781 switch (dp->icmp6_type) {
782 case ICMP6_DST_UNREACH:
783 ND_TCHECK(oip->ip6_dst);
784 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)));
785 switch (dp->icmp6_code) {
786
787 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
788 case ICMP6_DST_UNREACH_ADMIN:
789 case ICMP6_DST_UNREACH_ADDR:
790 ND_PRINT((ndo," %s",ip6addr_string(&oip->ip6_dst)));
791 break;
792 case ICMP6_DST_UNREACH_BEYONDSCOPE:
793 ND_PRINT((ndo," %s, source address %s",
794 ip6addr_string(&oip->ip6_dst),
795 ip6addr_string(&oip->ip6_src)));
796 break;
797 case ICMP6_DST_UNREACH_NOPORT:
798 if ((ouh = get_upperlayer(ndo, (u_char *)oip, &prot))
799 == NULL)
800 goto trunc;
801
802 dport = EXTRACT_16BITS(&ouh->uh_dport);
803 switch (prot) {
804 case IPPROTO_TCP:
805 ND_PRINT((ndo,", %s tcp port %s",
806 ip6addr_string(&oip->ip6_dst),
807 tcpport_string(dport)));
808 break;
809 case IPPROTO_UDP:
810 ND_PRINT((ndo,", %s udp port %s",
811 ip6addr_string(&oip->ip6_dst),
812 udpport_string(dport)));
813 break;
814 default:
815 ND_PRINT((ndo,", %s protocol %d port %d unreachable",
816 ip6addr_string(&oip->ip6_dst),
817 oip->ip6_nxt, dport));
818 break;
819 }
820 break;
821 default:
822 if (ndo->ndo_vflag <= 1) {
823 print_unknown_data(ndo, bp,"\n\t",length);
824 return;
825 }
826 break;
827 }
828 break;
829 case ICMP6_PACKET_TOO_BIG:
830 ND_TCHECK(dp->icmp6_mtu);
831 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
832 break;
833 case ICMP6_TIME_EXCEEDED:
834 ND_TCHECK(oip->ip6_dst);
835 switch (dp->icmp6_code) {
836 case ICMP6_TIME_EXCEED_TRANSIT:
837 ND_PRINT((ndo," for %s",
838 ip6addr_string(&oip->ip6_dst)));
839 break;
840 case ICMP6_TIME_EXCEED_REASSEMBLY:
841 ND_PRINT((ndo," (reassembly)"));
842 break;
843 default:
844 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
845 break;
846 }
847 break;
848 case ICMP6_PARAM_PROB:
849 ND_TCHECK(oip->ip6_dst);
850 switch (dp->icmp6_code) {
851 case ICMP6_PARAMPROB_HEADER:
852 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
853 break;
854 case ICMP6_PARAMPROB_NEXTHEADER:
855 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
856 break;
857 case ICMP6_PARAMPROB_OPTION:
858 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
859 break;
860 default:
861 ND_PRINT((ndo,", code-#%d",
862 dp->icmp6_code));
863 break;
864 }
865 break;
866 case ICMP6_ECHO_REQUEST:
867 case ICMP6_ECHO_REPLY:
868 ND_TCHECK(dp->icmp6_seq);
869 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)));
870 break;
871 case ICMP6_MEMBERSHIP_QUERY:
872 if (length == MLD_MINLEN) {
873 mld6_print(ndo, (const u_char *)dp);
874 } else if (length >= MLDV2_MINLEN) {
875 ND_PRINT((ndo," v2"));
876 mldv2_query_print(ndo, (const u_char *)dp, length);
877 } else {
878 ND_PRINT((ndo," unknown-version (len %u) ", length));
879 }
880 break;
881 case ICMP6_MEMBERSHIP_REPORT:
882 mld6_print(ndo, (const u_char *)dp);
883 break;
884 case ICMP6_MEMBERSHIP_REDUCTION:
885 mld6_print(ndo, (const u_char *)dp);
886 break;
887 case ND_ROUTER_SOLICIT:
888 #define RTSOLLEN 8
889 if (ndo->ndo_vflag) {
890 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
891 length - RTSOLLEN);
892 }
893 break;
894 case ND_ROUTER_ADVERT:
895 #define RTADVLEN 16
896 if (ndo->ndo_vflag) {
897 struct nd_router_advert *p;
898
899 p = (struct nd_router_advert *)dp;
900 ND_TCHECK(p->nd_ra_retransmit);
901 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
902 ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
903 (u_int)p->nd_ra_curhoplimit,
904 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
905 get_rtpref(p->nd_ra_flags_reserved),
906 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
907 EXTRACT_32BITS(&p->nd_ra_reachable),
908 EXTRACT_32BITS(&p->nd_ra_retransmit)));
909
910 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
911 length - RTADVLEN);
912 }
913 break;
914 case ND_NEIGHBOR_SOLICIT:
915 {
916 struct nd_neighbor_solicit *p;
917 p = (struct nd_neighbor_solicit *)dp;
918 ND_TCHECK(p->nd_ns_target);
919 ND_PRINT((ndo,", who has %s", ip6addr_string(&p->nd_ns_target)));
920 if (ndo->ndo_vflag) {
921 #define NDSOLLEN 24
922 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
923 length - NDSOLLEN);
924 }
925 }
926 break;
927 case ND_NEIGHBOR_ADVERT:
928 {
929 struct nd_neighbor_advert *p;
930
931 p = (struct nd_neighbor_advert *)dp;
932 ND_TCHECK(p->nd_na_target);
933 ND_PRINT((ndo,", tgt is %s",
934 ip6addr_string(&p->nd_na_target)));
935 if (ndo->ndo_vflag) {
936 ND_PRINT((ndo,", Flags [%s]",
937 bittok2str(icmp6_nd_na_flag_values,
938 "none",
939 EXTRACT_32BITS(&p->nd_na_flags_reserved))));
940 #define NDADVLEN 24
941 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
942 length - NDADVLEN);
943 #undef NDADVLEN
944 }
945 }
946 break;
947 case ND_REDIRECT:
948 #define RDR(i) ((struct nd_redirect *)(i))
949 ND_TCHECK(RDR(dp)->nd_rd_dst);
950 ND_PRINT((ndo,", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst)));
951 ND_TCHECK(RDR(dp)->nd_rd_target);
952 ND_PRINT((ndo," to %s",
953 getname6((const u_char*)&RDR(dp)->nd_rd_target)));
954 #define REDIRECTLEN 40
955 if (ndo->ndo_vflag) {
956 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
957 length - REDIRECTLEN);
958 }
959 break;
960 #undef REDIRECTLEN
961 #undef RDR
962 case ICMP6_ROUTER_RENUMBERING:
963 icmp6_rrenum_print(ndo, bp, ep);
964 break;
965 case ICMP6_NI_QUERY:
966 case ICMP6_NI_REPLY:
967 icmp6_nodeinfo_print(ndo, length, bp, ep);
968 break;
969 case IND_SOLICIT:
970 case IND_ADVERT:
971 break;
972 case ICMP6_V2_MEMBERSHIP_REPORT:
973 mldv2_report_print(ndo, (const u_char *) dp, length);
974 break;
975 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
976 case ICMP6_HADISCOV_REQUEST:
977 ND_TCHECK(dp->icmp6_data16[0]);
978 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
979 break;
980 case ICMP6_HADISCOV_REPLY:
981 if (ndo->ndo_vflag) {
982 struct in6_addr *in6;
983 u_char *cp;
984
985 ND_TCHECK(dp->icmp6_data16[0]);
986 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
987 cp = (u_char *)dp + length;
988 in6 = (struct in6_addr *)(dp + 1);
989 for (; (u_char *)in6 < cp; in6++) {
990 ND_TCHECK(*in6);
991 ND_PRINT((ndo,", %s", ip6addr_string(in6)));
992 }
993 }
994 break;
995 case ICMP6_MOBILEPREFIX_ADVERT:
996 if (ndo->ndo_vflag) {
997 ND_TCHECK(dp->icmp6_data16[0]);
998 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
999 if (dp->icmp6_data16[1] & 0xc0)
1000 ND_PRINT((ndo," "));
1001 if (dp->icmp6_data16[1] & 0x80)
1002 ND_PRINT((ndo,"M"));
1003 if (dp->icmp6_data16[1] & 0x40)
1004 ND_PRINT((ndo,"O"));
1005 #define MPADVLEN 8
1006 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1007 length - MPADVLEN);
1008 }
1009 break;
1010 case ND_RPL_MESSAGE:
1011 rpl_print(ndo, dp, &dp->icmp6_data8[0], length);
1012 break;
1013 default:
1014 ND_PRINT((ndo,", length %u", length));
1015 if (ndo->ndo_vflag <= 1)
1016 print_unknown_data(ndo, bp,"\n\t", length);
1017 return;
1018 }
1019 if (!ndo->ndo_vflag)
1020 ND_PRINT((ndo,", length %u", length));
1021 return;
1022 trunc:
1023 ND_PRINT((ndo, "[|icmp6]"));
1024 }
1025
1026 static struct udphdr *
1027 get_upperlayer(netdissect_options *ndo, u_char *bp, u_int *prot)
1028 {
1029 const u_char *ep;
1030 struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
1031 struct udphdr *uh;
1032 struct ip6_hbh *hbh;
1033 struct ip6_frag *fragh;
1034 struct ah *ah;
1035 u_int nh;
1036 int hlen;
1037
1038 /* 'ep' points to the end of available data. */
1039 ep = ndo->ndo_snapend;
1040
1041 if (!ND_TTEST(ip6->ip6_nxt))
1042 return NULL;
1043
1044 nh = ip6->ip6_nxt;
1045 hlen = sizeof(struct ip6_hdr);
1046
1047 while (bp < ep) {
1048 bp += hlen;
1049
1050 switch(nh) {
1051 case IPPROTO_UDP:
1052 case IPPROTO_TCP:
1053 uh = (struct udphdr *)bp;
1054 if (ND_TTEST(uh->uh_dport)) {
1055 *prot = nh;
1056 return(uh);
1057 }
1058 else
1059 return(NULL);
1060 /* NOTREACHED */
1061
1062 case IPPROTO_HOPOPTS:
1063 case IPPROTO_DSTOPTS:
1064 case IPPROTO_ROUTING:
1065 hbh = (struct ip6_hbh *)bp;
1066 if (!ND_TTEST(hbh->ip6h_len))
1067 return(NULL);
1068 nh = hbh->ip6h_nxt;
1069 hlen = (hbh->ip6h_len + 1) << 3;
1070 break;
1071
1072 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1073 fragh = (struct ip6_frag *)bp;
1074 if (!ND_TTEST(fragh->ip6f_offlg))
1075 return(NULL);
1076 /* fragments with non-zero offset are meaningless */
1077 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1078 return(NULL);
1079 nh = fragh->ip6f_nxt;
1080 hlen = sizeof(struct ip6_frag);
1081 break;
1082
1083 case IPPROTO_AH:
1084 ah = (struct ah *)bp;
1085 if (!ND_TTEST(ah->ah_len))
1086 return(NULL);
1087 nh = ah->ah_nxt;
1088 hlen = (ah->ah_len + 2) << 2;
1089 break;
1090
1091 default: /* unknown or undecodable header */
1092 *prot = nh; /* meaningless, but set here anyway */
1093 return(NULL);
1094 }
1095 }
1096
1097 return(NULL); /* should be notreached, though */
1098 }
1099
1100 static void
1101 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1102 {
1103 const struct nd_opt_hdr *op;
1104 const struct nd_opt_prefix_info *opp;
1105 const struct nd_opt_mtu *opm;
1106 const struct nd_opt_rdnss *oprd;
1107 const struct nd_opt_dnssl *opds;
1108 const struct nd_opt_advinterval *opa;
1109 const struct nd_opt_homeagent_info *oph;
1110 const struct nd_opt_route_info *opri;
1111 const u_char *cp, *ep, *domp;
1112 struct in6_addr in6, *in6p;
1113 size_t l;
1114 u_int i;
1115
1116 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
1117
1118 cp = bp;
1119 /* 'ep' points to the end of available data. */
1120 ep = ndo->ndo_snapend;
1121
1122 while (cp < ep) {
1123 op = (struct nd_opt_hdr *)cp;
1124
1125 ECHECK(op->nd_opt_len);
1126 if (resid <= 0)
1127 return;
1128 if (op->nd_opt_len == 0)
1129 goto trunc;
1130 if (cp + (op->nd_opt_len << 3) > ep)
1131 goto trunc;
1132
1133 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ",
1134 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
1135 op->nd_opt_type,
1136 op->nd_opt_len << 3,
1137 op->nd_opt_len));
1138
1139 switch (op->nd_opt_type) {
1140 case ND_OPT_SOURCE_LINKADDR:
1141 l = (op->nd_opt_len << 3) - 2;
1142 print_lladdr(ndo, cp + 2, l);
1143 break;
1144 case ND_OPT_TARGET_LINKADDR:
1145 l = (op->nd_opt_len << 3) - 2;
1146 print_lladdr(ndo, cp + 2, l);
1147 break;
1148 case ND_OPT_PREFIX_INFORMATION:
1149 opp = (struct nd_opt_prefix_info *)op;
1150 ND_TCHECK(opp->nd_opt_pi_prefix);
1151 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
1152 ip6addr_string(&opp->nd_opt_pi_prefix),
1153 opp->nd_opt_pi_prefix_len,
1154 (op->nd_opt_len != 4) ? "badlen" : "",
1155 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
1156 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))));
1157 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))));
1158 break;
1159 case ND_OPT_REDIRECTED_HEADER:
1160 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3);
1161 /* xxx */
1162 break;
1163 case ND_OPT_MTU:
1164 opm = (struct nd_opt_mtu *)op;
1165 ND_TCHECK(opm->nd_opt_mtu_mtu);
1166 ND_PRINT((ndo," %u%s",
1167 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
1168 (op->nd_opt_len != 1) ? "bad option length" : "" ));
1169 break;
1170 case ND_OPT_RDNSS:
1171 oprd = (struct nd_opt_rdnss *)op;
1172 l = (op->nd_opt_len - 1) / 2;
1173 ND_PRINT((ndo," lifetime %us,",
1174 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
1175 for (i = 0; i < l; i++) {
1176 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]);
1177 ND_PRINT((ndo," addr: %s",
1178 ip6addr_string(&oprd->nd_opt_rdnss_addr[i])));
1179 }
1180 break;
1181 case ND_OPT_DNSSL:
1182 opds = (struct nd_opt_dnssl *)op;
1183 ND_PRINT((ndo," lifetime %us, domain(s):",
1184 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
1185 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1186 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
1187 {
1188 printf (" ");
1189 if ((domp = ns_nprint (domp, bp)) == NULL)
1190 goto trunc;
1191 }
1192 break;
1193 case ND_OPT_ADVINTERVAL:
1194 opa = (struct nd_opt_advinterval *)op;
1195 ND_TCHECK(opa->nd_opt_adv_interval);
1196 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
1197 break;
1198 case ND_OPT_HOMEAGENT_INFO:
1199 oph = (struct nd_opt_homeagent_info *)op;
1200 ND_TCHECK(oph->nd_opt_hai_lifetime);
1201 ND_PRINT((ndo," preference %u, lifetime %u",
1202 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
1203 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
1204 break;
1205 case ND_OPT_ROUTE_INFO:
1206 opri = (struct nd_opt_route_info *)op;
1207 ND_TCHECK(opri->nd_opt_rti_lifetime);
1208 memset(&in6, 0, sizeof(in6));
1209 in6p = (struct in6_addr *)(opri + 1);
1210 switch (op->nd_opt_len) {
1211 case 1:
1212 break;
1213 case 2:
1214 ND_TCHECK2(*in6p, 8);
1215 memcpy(&in6, opri + 1, 8);
1216 break;
1217 case 3:
1218 ND_TCHECK(*in6p);
1219 memcpy(&in6, opri + 1, sizeof(in6));
1220 break;
1221 default:
1222 goto trunc;
1223 }
1224 ND_PRINT((ndo," %s/%u", ip6addr_string(&in6),
1225 opri->nd_opt_rti_prefixlen));
1226 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags)));
1227 ND_PRINT((ndo,", lifetime=%s",
1228 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))));
1229 break;
1230 default:
1231 if (ndo->ndo_vflag <= 1) {
1232 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1233 return;
1234 }
1235 break;
1236 }
1237 /* do we want to see an additional hexdump ? */
1238 if (ndo->ndo_vflag> 1)
1239 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1240
1241 cp += op->nd_opt_len << 3;
1242 resid -= op->nd_opt_len << 3;
1243 }
1244 return;
1245
1246 trunc:
1247 ND_PRINT((ndo, "[ndp opt]"));
1248 return;
1249 #undef ECHECK
1250 }
1251
1252 static void
1253 mld6_print(netdissect_options *ndo, const u_char *bp)
1254 {
1255 struct mld6_hdr *mp = (struct mld6_hdr *)bp;
1256 const u_char *ep;
1257
1258 /* 'ep' points to the end of available data. */
1259 ep = ndo->ndo_snapend;
1260
1261 if ((u_char *)mp + sizeof(*mp) > ep)
1262 return;
1263
1264 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
1265 ND_PRINT((ndo,"addr: %s", ip6addr_string(&mp->mld6_addr)));
1266 }
1267
1268 static void
1269 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1270 {
1271 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
1272 u_int group, nsrcs, ngroups;
1273 u_int i, j;
1274
1275 /* Minimum len is 8 */
1276 if (len < 8) {
1277 ND_PRINT((ndo," [invalid len %d]", len));
1278 return;
1279 }
1280
1281 ND_TCHECK(icp->icmp6_data16[1]);
1282 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
1283 ND_PRINT((ndo,", %d group record(s)", ngroups));
1284 if (ndo->ndo_vflag > 0) {
1285 /* Print the group records */
1286 group = 8;
1287 for (i = 0; i < ngroups; i++) {
1288 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1289 if (len < group + 20) {
1290 ND_PRINT((ndo," [invalid number of groups]"));
1291 return;
1292 }
1293 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr));
1294 ND_PRINT((ndo," [gaddr %s", ip6addr_string(&bp[group + 4])));
1295 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]",
1296 bp[group])));
1297 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
1298 /* Check the number of sources and print them */
1299 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
1300 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
1301 return;
1302 }
1303 if (ndo->ndo_vflag == 1)
1304 ND_PRINT((ndo,", %d source(s)", nsrcs));
1305 else {
1306 /* Print the sources */
1307 (void)ND_PRINT((ndo," {"));
1308 for (j = 0; j < nsrcs; j++) {
1309 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
1310 sizeof(struct in6_addr));
1311 ND_PRINT((ndo," %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)])));
1312 }
1313 (void)ND_PRINT((ndo," }"));
1314 }
1315 /* Next group record */
1316 group += 20 + nsrcs * sizeof(struct in6_addr);
1317 ND_PRINT((ndo,"]"));
1318 }
1319 }
1320 return;
1321 trunc:
1322 (void)ND_PRINT((ndo,"[|icmp6]"));
1323 return;
1324 }
1325
1326 static void
1327 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1328 {
1329 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
1330 u_int mrc;
1331 int mrt, qqi;
1332 u_int nsrcs;
1333 register u_int i;
1334
1335 /* Minimum len is 28 */
1336 if (len < 28) {
1337 ND_PRINT((ndo," [invalid len %d]", len));
1338 return;
1339 }
1340 ND_TCHECK(icp->icmp6_data16[0]);
1341 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
1342 if (mrc < 32768) {
1343 mrt = mrc;
1344 } else {
1345 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1346 }
1347 if (ndo->ndo_vflag) {
1348 (void)ND_PRINT((ndo," [max resp delay=%d]", mrt));
1349 }
1350 ND_TCHECK2(bp[8], sizeof(struct in6_addr));
1351 ND_PRINT((ndo," [gaddr %s", ip6addr_string(&bp[8])));
1352
1353 if (ndo->ndo_vflag) {
1354 ND_TCHECK(bp[25]);
1355 if (bp[24] & 0x08) {
1356 ND_PRINT((ndo," sflag"));
1357 }
1358 if (bp[24] & 0x07) {
1359 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07));
1360 }
1361 if (bp[25] < 128) {
1362 qqi = bp[25];
1363 } else {
1364 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
1365 }
1366 ND_PRINT((ndo," qqi=%d", qqi));
1367 }
1368
1369 ND_TCHECK2(bp[26], 2);
1370 nsrcs = EXTRACT_16BITS(&bp[26]);
1371 if (nsrcs > 0) {
1372 if (len < 28 + nsrcs * sizeof(struct in6_addr))
1373 ND_PRINT((ndo," [invalid number of sources]"));
1374 else if (ndo->ndo_vflag > 1) {
1375 ND_PRINT((ndo," {"));
1376 for (i = 0; i < nsrcs; i++) {
1377 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
1378 sizeof(struct in6_addr));
1379 ND_PRINT((ndo," %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)])));
1380 }
1381 ND_PRINT((ndo," }"));
1382 } else
1383 ND_PRINT((ndo,", %d source(s)", nsrcs));
1384 }
1385 ND_PRINT((ndo,"]"));
1386 return;
1387 trunc:
1388 (void)ND_PRINT((ndo,"[|icmp6]"));
1389 return;
1390 }
1391
1392 static void
1393 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1394 {
1395 int i;
1396
1397 /* DNS name decoding - no decompression */
1398 ND_PRINT((ndo,", \""));
1399 while (cp < ep) {
1400 i = *cp++;
1401 if (i) {
1402 if (i > ep - cp) {
1403 ND_PRINT((ndo,"???"));
1404 break;
1405 }
1406 while (i-- && cp < ep) {
1407 safeputchar(*cp);
1408 cp++;
1409 }
1410 if (cp + 1 < ep && *cp)
1411 ND_PRINT((ndo,"."));
1412 } else {
1413 if (cp == ep) {
1414 /* FQDN */
1415 ND_PRINT((ndo,"."));
1416 } else if (cp + 1 == ep && *cp == '\0') {
1417 /* truncated */
1418 } else {
1419 /* invalid */
1420 ND_PRINT((ndo,"???"));
1421 }
1422 break;
1423 }
1424 }
1425 ND_PRINT((ndo,"\""));
1426 }
1427
1428 static void
1429 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1430 {
1431 struct icmp6_nodeinfo *ni6;
1432 struct icmp6_hdr *dp;
1433 const u_char *cp;
1434 size_t siz, i;
1435 int needcomma;
1436
1437 if (ep < bp)
1438 return;
1439 dp = (struct icmp6_hdr *)bp;
1440 ni6 = (struct icmp6_nodeinfo *)bp;
1441 siz = ep - bp;
1442
1443 switch (ni6->ni_type) {
1444 case ICMP6_NI_QUERY:
1445 if (siz == sizeof(*dp) + 4) {
1446 /* KAME who-are-you */
1447 ND_PRINT((ndo," who-are-you request"));
1448 break;
1449 }
1450 ND_PRINT((ndo," node information query"));
1451
1452 ND_TCHECK2(*dp, sizeof(*ni6));
1453 ni6 = (struct icmp6_nodeinfo *)dp;
1454 ND_PRINT((ndo," (")); /*)*/
1455 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1456 case NI_QTYPE_NOOP:
1457 ND_PRINT((ndo,"noop"));
1458 break;
1459 case NI_QTYPE_SUPTYPES:
1460 ND_PRINT((ndo,"supported qtypes"));
1461 i = EXTRACT_16BITS(&ni6->ni_flags);
1462 if (i)
1463 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1464 break;
1465 break;
1466 case NI_QTYPE_FQDN:
1467 ND_PRINT((ndo,"DNS name"));
1468 break;
1469 case NI_QTYPE_NODEADDR:
1470 ND_PRINT((ndo,"node addresses"));
1471 i = ni6->ni_flags;
1472 if (!i)
1473 break;
1474 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1475 ND_PRINT((ndo," [%s%s%s%s%s%s]",
1476 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1477 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1478 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1479 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1480 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1481 (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""));
1482 break;
1483 default:
1484 ND_PRINT((ndo,"unknown"));
1485 break;
1486 }
1487
1488 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1489 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1490 if (siz != sizeof(*ni6))
1491 if (ndo->ndo_vflag)
1492 ND_PRINT((ndo,", invalid len"));
1493 /*(*/
1494 ND_PRINT((ndo,")"));
1495 break;
1496 }
1497
1498
1499 /* XXX backward compat, icmp-name-lookup-03 */
1500 if (siz == sizeof(*ni6)) {
1501 ND_PRINT((ndo,", 03 draft"));
1502 /*(*/
1503 ND_PRINT((ndo,")"));
1504 break;
1505 }
1506
1507 switch (ni6->ni_code) {
1508 case ICMP6_NI_SUBJ_IPV6:
1509 if (!ND_TTEST2(*dp,
1510 sizeof(*ni6) + sizeof(struct in6_addr)))
1511 break;
1512 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1513 if (ndo->ndo_vflag)
1514 ND_PRINT((ndo,", invalid subject len"));
1515 break;
1516 }
1517 ND_PRINT((ndo,", subject=%s",
1518 getname6((const u_char *)(ni6 + 1))));
1519 break;
1520 case ICMP6_NI_SUBJ_FQDN:
1521 ND_PRINT((ndo,", subject=DNS name"));
1522 cp = (const u_char *)(ni6 + 1);
1523 if (cp[0] == ep - cp - 1) {
1524 /* icmp-name-lookup-03, pascal string */
1525 if (ndo->ndo_vflag)
1526 ND_PRINT((ndo,", 03 draft"));
1527 cp++;
1528 ND_PRINT((ndo,", \""));
1529 while (cp < ep) {
1530 safeputchar(*cp);
1531 cp++;
1532 }
1533 ND_PRINT((ndo,"\""));
1534 } else
1535 dnsname_print(ndo, cp, ep);
1536 break;
1537 case ICMP6_NI_SUBJ_IPV4:
1538 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1539 break;
1540 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1541 if (ndo->ndo_vflag)
1542 ND_PRINT((ndo,", invalid subject len"));
1543 break;
1544 }
1545 ND_PRINT((ndo,", subject=%s",
1546 getname((const u_char *)(ni6 + 1))));
1547 break;
1548 default:
1549 ND_PRINT((ndo,", unknown subject"));
1550 break;
1551 }
1552
1553 /*(*/
1554 ND_PRINT((ndo,")"));
1555 break;
1556
1557 case ICMP6_NI_REPLY:
1558 if (icmp6len > siz) {
1559 ND_PRINT((ndo,"[|icmp6: node information reply]"));
1560 break;
1561 }
1562
1563 needcomma = 0;
1564
1565 ni6 = (struct icmp6_nodeinfo *)dp;
1566 ND_PRINT((ndo," node information reply"));
1567 ND_PRINT((ndo," (")); /*)*/
1568 switch (ni6->ni_code) {
1569 case ICMP6_NI_SUCCESS:
1570 if (ndo->ndo_vflag) {
1571 ND_PRINT((ndo,"success"));
1572 needcomma++;
1573 }
1574 break;
1575 case ICMP6_NI_REFUSED:
1576 ND_PRINT((ndo,"refused"));
1577 needcomma++;
1578 if (siz != sizeof(*ni6))
1579 if (ndo->ndo_vflag)
1580 ND_PRINT((ndo,", invalid length"));
1581 break;
1582 case ICMP6_NI_UNKNOWN:
1583 ND_PRINT((ndo,"unknown"));
1584 needcomma++;
1585 if (siz != sizeof(*ni6))
1586 if (ndo->ndo_vflag)
1587 ND_PRINT((ndo,", invalid length"));
1588 break;
1589 }
1590
1591 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1592 /*(*/
1593 ND_PRINT((ndo,")"));
1594 break;
1595 }
1596
1597 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1598 case NI_QTYPE_NOOP:
1599 if (needcomma)
1600 ND_PRINT((ndo,", "));
1601 ND_PRINT((ndo,"noop"));
1602 if (siz != sizeof(*ni6))
1603 if (ndo->ndo_vflag)
1604 ND_PRINT((ndo,", invalid length"));
1605 break;
1606 case NI_QTYPE_SUPTYPES:
1607 if (needcomma)
1608 ND_PRINT((ndo,", "));
1609 ND_PRINT((ndo,"supported qtypes"));
1610 i = EXTRACT_16BITS(&ni6->ni_flags);
1611 if (i)
1612 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1613 break;
1614 case NI_QTYPE_FQDN:
1615 if (needcomma)
1616 ND_PRINT((ndo,", "));
1617 ND_PRINT((ndo,"DNS name"));
1618 cp = (const u_char *)(ni6 + 1) + 4;
1619 if (cp[0] == ep - cp - 1) {
1620 /* icmp-name-lookup-03, pascal string */
1621 if (ndo->ndo_vflag)
1622 ND_PRINT((ndo,", 03 draft"));
1623 cp++;
1624 ND_PRINT((ndo,", \""));
1625 while (cp < ep) {
1626 safeputchar(*cp);
1627 cp++;
1628 }
1629 ND_PRINT((ndo,"\""));
1630 } else
1631 dnsname_print(ndo, cp, ep);
1632 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1633 ND_PRINT((ndo," [TTL=%u]", *(u_int32_t *)(ni6 + 1)));
1634 break;
1635 case NI_QTYPE_NODEADDR:
1636 if (needcomma)
1637 ND_PRINT((ndo,", "));
1638 ND_PRINT((ndo,"node addresses"));
1639 i = sizeof(*ni6);
1640 while (i < siz) {
1641 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1642 break;
1643 ND_PRINT((ndo," %s", getname6(bp + i)));
1644 i += sizeof(struct in6_addr);
1645 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
1646 i += sizeof(int32_t);
1647 }
1648 i = ni6->ni_flags;
1649 if (!i)
1650 break;
1651 ND_PRINT((ndo," [%s%s%s%s%s%s%s]",
1652 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1653 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1654 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1655 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1656 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1657 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1658 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""));
1659 break;
1660 default:
1661 if (needcomma)
1662 ND_PRINT((ndo,", "));
1663 ND_PRINT((ndo,"unknown"));
1664 break;
1665 }
1666
1667 /*(*/
1668 ND_PRINT((ndo,")"));
1669 break;
1670 }
1671 return;
1672
1673 trunc:
1674 ND_PRINT((ndo, "[|icmp6]"));
1675 }
1676
1677 static void
1678 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1679 {
1680 struct icmp6_router_renum *rr6;
1681 const char *cp;
1682 struct rr_pco_match *match;
1683 struct rr_pco_use *use;
1684 char hbuf[NI_MAXHOST];
1685 int n;
1686
1687 if (ep < bp)
1688 return;
1689 rr6 = (struct icmp6_router_renum *)bp;
1690 cp = (const char *)(rr6 + 1);
1691
1692 ND_TCHECK(rr6->rr_reserved);
1693 switch (rr6->rr_code) {
1694 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1695 ND_PRINT((ndo,"router renum: command"));
1696 break;
1697 case ICMP6_ROUTER_RENUMBERING_RESULT:
1698 ND_PRINT((ndo,"router renum: result"));
1699 break;
1700 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1701 ND_PRINT((ndo,"router renum: sequence number reset"));
1702 break;
1703 default:
1704 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
1705 break;
1706 }
1707
1708 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
1709
1710 if (ndo->ndo_vflag) {
1711 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1712 ND_PRINT((ndo,"[")); /*]*/
1713 if (rr6->rr_flags) {
1714 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1715 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1716 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1717 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1718 F(ICMP6_RR_FLAGS_PREVDONE, "P")));
1719 }
1720 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum));
1721 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
1722 if (rr6->rr_reserved)
1723 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
1724 /*[*/
1725 ND_PRINT((ndo,"]"));
1726 #undef F
1727 }
1728
1729 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1730 match = (struct rr_pco_match *)cp;
1731 cp = (const char *)(match + 1);
1732
1733 ND_TCHECK(match->rpm_prefix);
1734
1735 if (ndo->ndo_vflag > 1)
1736 ND_PRINT((ndo,"\n\t"));
1737 else
1738 ND_PRINT((ndo," "));
1739 ND_PRINT((ndo,"match(")); /*)*/
1740 switch (match->rpm_code) {
1741 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break;
1742 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break;
1743 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break;
1744 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break;
1745 }
1746
1747 if (ndo->ndo_vflag) {
1748 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal));
1749 ND_PRINT((ndo,",min=%u", match->rpm_minlen));
1750 ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
1751 }
1752 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1753 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
1754 else
1755 ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
1756 /*(*/
1757 ND_PRINT((ndo,")"));
1758
1759 n = match->rpm_len - 3;
1760 if (n % 4)
1761 goto trunc;
1762 n /= 4;
1763 while (n-- > 0) {
1764 use = (struct rr_pco_use *)cp;
1765 cp = (const char *)(use + 1);
1766
1767 ND_TCHECK(use->rpu_prefix);
1768
1769 if (ndo->ndo_vflag > 1)
1770 ND_PRINT((ndo,"\n\t"));
1771 else
1772 ND_PRINT((ndo," "));
1773 ND_PRINT((ndo,"use(")); /*)*/
1774 if (use->rpu_flags) {
1775 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1776 ND_PRINT((ndo,"%s%s,",
1777 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1778 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")));
1779 #undef F
1780 }
1781 if (ndo->ndo_vflag) {
1782 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask));
1783 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags));
1784 if (~use->rpu_vltime == 0)
1785 ND_PRINT((ndo,"vltime=infty,"));
1786 else
1787 ND_PRINT((ndo,"vltime=%u,",
1788 EXTRACT_32BITS(&use->rpu_vltime)));
1789 if (~use->rpu_pltime == 0)
1790 ND_PRINT((ndo,"pltime=infty,"));
1791 else
1792 ND_PRINT((ndo,"pltime=%u,",
1793 EXTRACT_32BITS(&use->rpu_pltime)));
1794 }
1795 if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1796 sizeof(hbuf)))
1797 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
1798 use->rpu_keeplen));
1799 else
1800 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
1801 use->rpu_keeplen));
1802 /*(*/
1803 ND_PRINT((ndo,")"));
1804 }
1805 }
1806
1807 return;
1808
1809 trunc:
1810 ND_PRINT((ndo,"[|icmp6]"));
1811 }
1812
1813 #endif /* INET6 */
1814
1815 /*
1816 * Local Variables:
1817 * c-style: whitesmith
1818 * c-basic-offset: 8
1819 * End:
1820 */
[mirror] the TCPdump network dissector