1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 /* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include <netdissect-stdinc.h>
29
30 #include <stdio.h>
31 #include <string.h>
32
33 #include "netdissect.h"
34 #include "addrtoname.h"
35 #include "addrtostr.h"
36 #include "extract.h"
37
38 #include "ip6.h"
39 #include "ipproto.h"
40
41 #include "udp.h"
42 #include "ah.h"
43
44 /* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
45 /* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
46
47 /*
48 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
49 * All rights reserved.
50 *
51 * Redistribution and use in source and binary forms, with or without
52 * modification, are permitted provided that the following conditions
53 * are met:
54 * 1. Redistributions of source code must retain the above copyright
55 * notice, this list of conditions and the following disclaimer.
56 * 2. Redistributions in binary form must reproduce the above copyright
57 * notice, this list of conditions and the following disclaimer in the
58 * documentation and/or other materials provided with the distribution.
59 * 3. Neither the name of the project nor the names of its contributors
60 * may be used to endorse or promote products derived from this software
61 * without specific prior written permission.
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 * SUCH DAMAGE.
74 */
75
76 struct icmp6_hdr {
77 uint8_t icmp6_type; /* type field */
78 uint8_t icmp6_code; /* code field */
79 uint16_t icmp6_cksum; /* checksum field */
80 union {
81 uint32_t icmp6_un_data32[1]; /* type-specific field */
82 uint16_t icmp6_un_data16[2]; /* type-specific field */
83 uint8_t icmp6_un_data8[4]; /* type-specific field */
84 } icmp6_dataun;
85 };
86
87 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
88 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
89 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
90 #define icmp6_pptr icmp6_data32[0] /* parameter prob */
91 #define icmp6_mtu icmp6_data32[0] /* packet too big */
92 #define icmp6_id icmp6_data16[0] /* echo request/reply */
93 #define icmp6_seq icmp6_data16[1] /* echo request/reply */
94 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
95
96 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
97 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
98 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
99 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */
100
101 #define ICMP6_ECHO_REQUEST 128 /* echo service */
102 #define ICMP6_ECHO_REPLY 129 /* echo reply */
103 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
104 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */
105 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
106 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */
107 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
108 #define MLD6_LISTENER_DONE 132 /* multicast listener done */
109
110 #define ND_ROUTER_SOLICIT 133 /* router solicitation */
111 #define ND_ROUTER_ADVERT 134 /* router advertisement */
112 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
113 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
114 #define ND_REDIRECT 137 /* redirect */
115
116 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
117
118 #define ICMP6_WRUREQUEST 139 /* who are you request */
119 #define ICMP6_WRUREPLY 140 /* who are you reply */
120 #define ICMP6_FQDN_QUERY 139 /* FQDN query */
121 #define ICMP6_FQDN_REPLY 140 /* FQDN reply */
122 #define ICMP6_NI_QUERY 139 /* node information request */
123 #define ICMP6_NI_REPLY 140 /* node information reply */
124 #define IND_SOLICIT 141 /* inverse neighbor solicitation */
125 #define IND_ADVERT 142 /* inverse neighbor advertisement */
126
127 #define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
128 #define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
129 #define ICMP6_HADISCOV_REQUEST 144
130 #define ICMP6_HADISCOV_REPLY 145
131 #define ICMP6_MOBILEPREFIX_SOLICIT 146
132 #define ICMP6_MOBILEPREFIX_ADVERT 147
133
134 #define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
135 #define MLD6_MTRACE 201 /* mtrace messages */
136
137 #define ICMP6_MAXTYPE 201
138
139 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
140 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
141 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
142 #define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
143 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
144 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
145
146 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
147 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
148
149 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
150 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
151 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
152
153 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
154
155 #define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
156 #define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
157 #define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
158
159 #define ICMP6_NI_SUCCESS 0 /* node information successful reply */
160 #define ICMP6_NI_REFUSED 1 /* node information request is refused */
161 #define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
162
163 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
164 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
165 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
166
167 /* Used in kernel only */
168 #define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
169 #define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
170
171 /*
172 * Multicast Listener Discovery
173 */
174 struct mld6_hdr {
175 struct icmp6_hdr mld6_hdr;
176 struct in6_addr mld6_addr; /* multicast address */
177 };
178
179 #define mld6_type mld6_hdr.icmp6_type
180 #define mld6_code mld6_hdr.icmp6_code
181 #define mld6_cksum mld6_hdr.icmp6_cksum
182 #define mld6_maxdelay mld6_hdr.icmp6_data16[0]
183 #define mld6_reserved mld6_hdr.icmp6_data16[1]
184
185 #define MLD_MINLEN 24
186 #define MLDV2_MINLEN 28
187
188 /*
189 * Neighbor Discovery
190 */
191
192 struct nd_router_solicit { /* router solicitation */
193 struct icmp6_hdr nd_rs_hdr;
194 /* could be followed by options */
195 };
196
197 #define nd_rs_type nd_rs_hdr.icmp6_type
198 #define nd_rs_code nd_rs_hdr.icmp6_code
199 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum
200 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
201
202 struct nd_router_advert { /* router advertisement */
203 struct icmp6_hdr nd_ra_hdr;
204 uint32_t nd_ra_reachable; /* reachable time */
205 uint32_t nd_ra_retransmit; /* retransmit timer */
206 /* could be followed by options */
207 };
208
209 #define nd_ra_type nd_ra_hdr.icmp6_type
210 #define nd_ra_code nd_ra_hdr.icmp6_code
211 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum
212 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
213 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
214 #define ND_RA_FLAG_MANAGED 0x80
215 #define ND_RA_FLAG_OTHER 0x40
216 #define ND_RA_FLAG_HOME_AGENT 0x20
217
218 /*
219 * Router preference values based on draft-draves-ipngwg-router-selection-01.
220 * These are non-standard definitions.
221 */
222 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
223
224 #define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
225 #define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
226 #define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
227 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
228
229 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
230
231 struct nd_neighbor_solicit { /* neighbor solicitation */
232 struct icmp6_hdr nd_ns_hdr;
233 struct in6_addr nd_ns_target; /*target address */
234 /* could be followed by options */
235 };
236
237 #define nd_ns_type nd_ns_hdr.icmp6_type
238 #define nd_ns_code nd_ns_hdr.icmp6_code
239 #define nd_ns_cksum nd_ns_hdr.icmp6_cksum
240 #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
241
242 struct nd_neighbor_advert { /* neighbor advertisement */
243 struct icmp6_hdr nd_na_hdr;
244 struct in6_addr nd_na_target; /* target address */
245 /* could be followed by options */
246 };
247
248 #define nd_na_type nd_na_hdr.icmp6_type
249 #define nd_na_code nd_na_hdr.icmp6_code
250 #define nd_na_cksum nd_na_hdr.icmp6_cksum
251 #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
252
253 #define ND_NA_FLAG_ROUTER 0x80000000
254 #define ND_NA_FLAG_SOLICITED 0x40000000
255 #define ND_NA_FLAG_OVERRIDE 0x20000000
256
257 struct nd_redirect { /* redirect */
258 struct icmp6_hdr nd_rd_hdr;
259 struct in6_addr nd_rd_target; /* target address */
260 struct in6_addr nd_rd_dst; /* destination address */
261 /* could be followed by options */
262 };
263
264 #define nd_rd_type nd_rd_hdr.icmp6_type
265 #define nd_rd_code nd_rd_hdr.icmp6_code
266 #define nd_rd_cksum nd_rd_hdr.icmp6_cksum
267 #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
268
269 struct nd_opt_hdr { /* Neighbor discovery option header */
270 uint8_t nd_opt_type;
271 uint8_t nd_opt_len;
272 /* followed by option specific data*/
273 };
274
275 #define ND_OPT_SOURCE_LINKADDR 1
276 #define ND_OPT_TARGET_LINKADDR 2
277 #define ND_OPT_PREFIX_INFORMATION 3
278 #define ND_OPT_REDIRECTED_HEADER 4
279 #define ND_OPT_MTU 5
280 #define ND_OPT_ADVINTERVAL 7
281 #define ND_OPT_HOMEAGENT_INFO 8
282 #define ND_OPT_ROUTE_INFO 24 /* RFC4191 */
283 #define ND_OPT_RDNSS 25
284 #define ND_OPT_DNSSL 31
285
286 struct nd_opt_prefix_info { /* prefix information */
287 nd_uint8_t nd_opt_pi_type;
288 nd_uint8_t nd_opt_pi_len;
289 nd_uint8_t nd_opt_pi_prefix_len;
290 nd_uint8_t nd_opt_pi_flags_reserved;
291 nd_uint32_t nd_opt_pi_valid_time;
292 nd_uint32_t nd_opt_pi_preferred_time;
293 nd_uint32_t nd_opt_pi_reserved2;
294 struct in6_addr nd_opt_pi_prefix;
295 };
296
297 #define ND_OPT_PI_FLAG_ONLINK 0x80
298 #define ND_OPT_PI_FLAG_AUTO 0x40
299 #define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
300
301 struct nd_opt_rd_hdr { /* redirected header */
302 uint8_t nd_opt_rh_type;
303 uint8_t nd_opt_rh_len;
304 uint16_t nd_opt_rh_reserved1;
305 uint32_t nd_opt_rh_reserved2;
306 /* followed by IP header and data */
307 };
308
309 struct nd_opt_mtu { /* MTU option */
310 uint8_t nd_opt_mtu_type;
311 uint8_t nd_opt_mtu_len;
312 uint16_t nd_opt_mtu_reserved;
313 uint32_t nd_opt_mtu_mtu;
314 };
315
316 struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
317 uint8_t nd_opt_rdnss_type;
318 uint8_t nd_opt_rdnss_len;
319 uint16_t nd_opt_rdnss_reserved;
320 uint32_t nd_opt_rdnss_lifetime;
321 struct in6_addr nd_opt_rdnss_addr[1]; /* variable-length */
322 };
323
324 struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
325 uint8_t nd_opt_dnssl_type;
326 uint8_t nd_opt_dnssl_len;
327 uint16_t nd_opt_dnssl_reserved;
328 uint32_t nd_opt_dnssl_lifetime;
329 /* followed by list of DNS search domains, variable-length */
330 };
331
332 struct nd_opt_advinterval { /* Advertisement interval option */
333 uint8_t nd_opt_adv_type;
334 uint8_t nd_opt_adv_len;
335 uint16_t nd_opt_adv_reserved;
336 uint32_t nd_opt_adv_interval;
337 };
338
339 struct nd_opt_homeagent_info { /* Home Agent info */
340 uint8_t nd_opt_hai_type;
341 uint8_t nd_opt_hai_len;
342 uint16_t nd_opt_hai_reserved;
343 int16_t nd_opt_hai_preference;
344 uint16_t nd_opt_hai_lifetime;
345 };
346
347 struct nd_opt_route_info { /* route info */
348 uint8_t nd_opt_rti_type;
349 uint8_t nd_opt_rti_len;
350 uint8_t nd_opt_rti_prefixlen;
351 uint8_t nd_opt_rti_flags;
352 uint32_t nd_opt_rti_lifetime;
353 /* prefix follows */
354 };
355
356 /*
357 * icmp6 namelookup
358 */
359
360 struct icmp6_namelookup {
361 struct icmp6_hdr icmp6_nl_hdr;
362 uint8_t icmp6_nl_nonce[8];
363 int32_t icmp6_nl_ttl;
364 #if 0
365 uint8_t icmp6_nl_len;
366 uint8_t icmp6_nl_name[3];
367 #endif
368 /* could be followed by options */
369 };
370
371 /*
372 * icmp6 node information
373 */
374 struct icmp6_nodeinfo {
375 struct icmp6_hdr icmp6_ni_hdr;
376 uint8_t icmp6_ni_nonce[8];
377 /* could be followed by reply data */
378 };
379
380 #define ni_type icmp6_ni_hdr.icmp6_type
381 #define ni_code icmp6_ni_hdr.icmp6_code
382 #define ni_cksum icmp6_ni_hdr.icmp6_cksum
383 #define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
384 #define ni_flags icmp6_ni_hdr.icmp6_data16[1]
385
386 #define NI_QTYPE_NOOP 0 /* NOOP */
387 #define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
388 #define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
389 #define NI_QTYPE_DNSNAME 2 /* DNS Name */
390 #define NI_QTYPE_NODEADDR 3 /* Node Addresses */
391 #define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
392
393 /* network endian */
394 #define NI_SUPTYPE_FLAG_COMPRESS ((uint16_t)htons(0x1))
395 #define NI_FQDN_FLAG_VALIDTTL ((uint16_t)htons(0x1))
396
397 /* network endian */
398 #define NI_NODEADDR_FLAG_TRUNCATE ((uint16_t)htons(0x1))
399 #define NI_NODEADDR_FLAG_ALL ((uint16_t)htons(0x2))
400 #define NI_NODEADDR_FLAG_COMPAT ((uint16_t)htons(0x4))
401 #define NI_NODEADDR_FLAG_LINKLOCAL ((uint16_t)htons(0x8))
402 #define NI_NODEADDR_FLAG_SITELOCAL ((uint16_t)htons(0x10))
403 #define NI_NODEADDR_FLAG_GLOBAL ((uint16_t)htons(0x20))
404 #define NI_NODEADDR_FLAG_ANYCAST ((uint16_t)htons(0x40)) /* just experimental. not in spec */
405
406 struct ni_reply_fqdn {
407 uint32_t ni_fqdn_ttl; /* TTL */
408 uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
409 uint8_t ni_fqdn_name[3]; /* XXX: alignment */
410 };
411
412 /*
413 * Router Renumbering. as router-renum-08.txt
414 */
415 struct icmp6_router_renum { /* router renumbering header */
416 struct icmp6_hdr rr_hdr;
417 uint8_t rr_segnum;
418 uint8_t rr_flags;
419 uint16_t rr_maxdelay;
420 uint32_t rr_reserved;
421 };
422 #define ICMP6_RR_FLAGS_TEST 0x80
423 #define ICMP6_RR_FLAGS_REQRESULT 0x40
424 #define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
425 #define ICMP6_RR_FLAGS_SPECSITE 0x10
426 #define ICMP6_RR_FLAGS_PREVDONE 0x08
427
428 #define rr_type rr_hdr.icmp6_type
429 #define rr_code rr_hdr.icmp6_code
430 #define rr_cksum rr_hdr.icmp6_cksum
431 #define rr_seqnum rr_hdr.icmp6_data32[0]
432
433 struct rr_pco_match { /* match prefix part */
434 uint8_t rpm_code;
435 uint8_t rpm_len;
436 uint8_t rpm_ordinal;
437 uint8_t rpm_matchlen;
438 uint8_t rpm_minlen;
439 uint8_t rpm_maxlen;
440 uint16_t rpm_reserved;
441 struct in6_addr rpm_prefix;
442 };
443
444 #define RPM_PCO_ADD 1
445 #define RPM_PCO_CHANGE 2
446 #define RPM_PCO_SETGLOBAL 3
447 #define RPM_PCO_MAX 4
448
449 struct rr_pco_use { /* use prefix part */
450 uint8_t rpu_uselen;
451 uint8_t rpu_keeplen;
452 uint8_t rpu_ramask;
453 uint8_t rpu_raflags;
454 uint32_t rpu_vltime;
455 uint32_t rpu_pltime;
456 uint32_t rpu_flags;
457 struct in6_addr rpu_prefix;
458 };
459 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
460 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
461
462 /* network endian */
463 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((uint32_t)htonl(0x80000000))
464 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((uint32_t)htonl(0x40000000))
465
466 struct rr_result { /* router renumbering result message */
467 uint16_t rrr_flags;
468 uint8_t rrr_ordinal;
469 uint8_t rrr_matchedlen;
470 uint32_t rrr_ifid;
471 struct in6_addr rrr_prefix;
472 };
473 /* network endian */
474 #define ICMP6_RR_RESULT_FLAGS_OOB ((uint16_t)htons(0x0002))
475 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((uint16_t)htons(0x0001))
476
477 static const char *get_rtpref(u_int);
478 static const char *get_lifetime(uint32_t);
479 static void print_lladdr(netdissect_options *ndo, const u_char *, size_t);
480 static void icmp6_opt_print(netdissect_options *ndo, const u_char *, int);
481 static void mld6_print(netdissect_options *ndo, const u_char *);
482 static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int);
483 static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int);
484 static const struct udphdr *get_upperlayer(netdissect_options *ndo, const u_char *, u_int *);
485 static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *);
486 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
487 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
488
489 #ifndef abs
490 #define abs(a) ((0 < (a)) ? (a) : -(a))
491 #endif
492
493 #include "rpl.h"
494
495 static const struct tok icmp6_type_values[] = {
496 { ICMP6_DST_UNREACH, "destination unreachable"},
497 { ICMP6_PACKET_TOO_BIG, "packet too big"},
498 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
499 { ICMP6_PARAM_PROB, "parameter problem"},
500 { ICMP6_ECHO_REQUEST, "echo request"},
501 { ICMP6_ECHO_REPLY, "echo reply"},
502 { MLD6_LISTENER_QUERY, "multicast listener query"},
503 { MLD6_LISTENER_REPORT, "multicast listener report"},
504 { MLD6_LISTENER_DONE, "multicast listener done"},
505 { ND_ROUTER_SOLICIT, "router solicitation"},
506 { ND_ROUTER_ADVERT, "router advertisement"},
507 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
508 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
509 { ND_REDIRECT, "redirect"},
510 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
511 { IND_SOLICIT, "inverse neighbor solicitation"},
512 { IND_ADVERT, "inverse neighbor advertisement"},
513 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
514 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
515 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
516 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
517 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
518 { ICMP6_WRUREQUEST, "who-are-you request"},
519 { ICMP6_WRUREPLY, "who-are-you reply"},
520 { ICMP6_NI_QUERY, "node information query"},
521 { ICMP6_NI_REPLY, "node information reply"},
522 { MLD6_MTRACE, "mtrace message"},
523 { MLD6_MTRACE_RESP, "mtrace response"},
524 { ND_RPL_MESSAGE, "RPL"},
525 { 0, NULL }
526 };
527
528 static const struct tok icmp6_dst_unreach_code_values[] = {
529 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
530 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
531 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
532 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
533 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
534 { 0, NULL }
535 };
536
537 static const struct tok icmp6_opt_pi_flag_values[] = {
538 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
539 { ND_OPT_PI_FLAG_AUTO, "auto" },
540 { ND_OPT_PI_FLAG_ROUTER, "router" },
541 { 0, NULL }
542 };
543
544 static const struct tok icmp6_opt_ra_flag_values[] = {
545 { ND_RA_FLAG_MANAGED, "managed" },
546 { ND_RA_FLAG_OTHER, "other stateful"},
547 { ND_RA_FLAG_HOME_AGENT, "home agent"},
548 { 0, NULL }
549 };
550
551 static const struct tok icmp6_nd_na_flag_values[] = {
552 { ND_NA_FLAG_ROUTER, "router" },
553 { ND_NA_FLAG_SOLICITED, "solicited" },
554 { ND_NA_FLAG_OVERRIDE, "override" },
555 { 0, NULL }
556 };
557
558
559 static const struct tok icmp6_opt_values[] = {
560 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
561 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
562 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
563 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
564 { ND_OPT_MTU, "mtu"},
565 { ND_OPT_RDNSS, "rdnss"},
566 { ND_OPT_DNSSL, "dnssl"},
567 { ND_OPT_ADVINTERVAL, "advertisement interval"},
568 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
569 { ND_OPT_ROUTE_INFO, "route info"},
570 { 0, NULL }
571 };
572
573 /* mldv2 report types */
574 static const struct tok mldv2report2str[] = {
575 { 1, "is_in" },
576 { 2, "is_ex" },
577 { 3, "to_in" },
578 { 4, "to_ex" },
579 { 5, "allow" },
580 { 6, "block" },
581 { 0, NULL }
582 };
583
584 static const char *
get_rtpref(u_int v)585 get_rtpref(u_int v)
586 {
587 static const char *rtpref_str[] = {
588 "medium", /* 00 */
589 "high", /* 01 */
590 "rsv", /* 10 */
591 "low" /* 11 */
592 };
593
594 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
595 }
596
597 static const char *
get_lifetime(uint32_t v)598 get_lifetime(uint32_t v)
599 {
600 static char buf[20];
601
602 if (v == (uint32_t)~0UL)
603 return "infinity";
604 else {
605 snprintf(buf, sizeof(buf), "%us", v);
606 return buf;
607 }
608 }
609
610 static void
print_lladdr(netdissect_options * ndo,const uint8_t * p,size_t l)611 print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l)
612 {
613 const uint8_t *ep, *q;
614
615 q = p;
616 ep = p + l;
617 while (l > 0 && q < ep) {
618 if (q > p)
619 ND_PRINT((ndo,":"));
620 ND_PRINT((ndo,"%02x", *q++));
621 l--;
622 }
623 }
624
icmp6_cksum(netdissect_options * ndo,const struct ip6_hdr * ip6,const struct icmp6_hdr * icp,u_int len)625 static int icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
626 const struct icmp6_hdr *icp, u_int len)
627 {
628 return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
629 IPPROTO_ICMPV6);
630 }
631
632 static const struct tok rpl_mop_values[] = {
633 { RPL_DIO_NONSTORING, "nonstoring"},
634 { RPL_DIO_STORING, "storing"},
635 { RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
636 { RPL_DIO_STORING_MULTICAST, "storing-multicast"},
637 { 0, NULL},
638 };
639
640 static const struct tok rpl_subopt_values[] = {
641 { RPL_OPT_PAD0, "pad0"},
642 { RPL_OPT_PADN, "padN"},
643 { RPL_DIO_METRICS, "metrics"},
644 { RPL_DIO_ROUTINGINFO, "routinginfo"},
645 { RPL_DIO_CONFIG, "config"},
646 { RPL_DAO_RPLTARGET, "rpltarget"},
647 { RPL_DAO_TRANSITINFO, "transitinfo"},
648 { RPL_DIO_DESTPREFIX, "destprefix"},
649 { RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"},
650 { 0, NULL},
651 };
652
653 static void
rpl_dio_printopt(netdissect_options * ndo,const struct rpl_dio_genoption * opt,u_int length)654 rpl_dio_printopt(netdissect_options *ndo,
655 const struct rpl_dio_genoption *opt,
656 u_int length)
657 {
658 if(length < RPL_DIO_GENOPTION_LEN) return;
659 length -= RPL_DIO_GENOPTION_LEN;
660
661 ND_TCHECK(opt->rpl_dio_len);
662
663 while((opt->rpl_dio_type == RPL_OPT_PAD0 &&
664 (const u_char *)opt < ndo->ndo_snapend) ||
665 ND_TTEST2(*opt,(opt->rpl_dio_len+2))) {
666
667 unsigned int optlen = opt->rpl_dio_len+2;
668 if(opt->rpl_dio_type == RPL_OPT_PAD0) {
669 optlen = 1;
670 ND_PRINT((ndo, " opt:pad0"));
671 } else {
672 ND_PRINT((ndo, " opt:%s len:%u ",
673 tok2str(rpl_subopt_values, "subopt:%u", opt->rpl_dio_type),
674 optlen));
675 if(ndo->ndo_vflag > 2) {
676 unsigned int paylen = opt->rpl_dio_len;
677 if(paylen > length) paylen = length;
678 hex_print(ndo,
679 " ",
680 ((const uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */
681 paylen);
682 }
683 }
684 opt = (const struct rpl_dio_genoption *)(((const char *)opt) + optlen);
685 length -= optlen;
686 }
687 return;
688 trunc:
689 ND_PRINT((ndo," [|truncated]"));
690 return;
691 }
692
693 static void
rpl_dio_print(netdissect_options * ndo,const u_char * bp,u_int length)694 rpl_dio_print(netdissect_options *ndo,
695 const u_char *bp, u_int length)
696 {
697 const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
698 const char *dagid_str;
699
700 ND_TCHECK(*dio);
701 dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
702
703 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
704 dagid_str,
705 dio->rpl_dtsn,
706 dio->rpl_instanceid,
707 EXTRACT_16BITS(&dio->rpl_dagrank),
708 RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"",
709 tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(dio->rpl_mopprf)),
710 RPL_DIO_PRF(dio->rpl_mopprf)));
711
712 if(ndo->ndo_vflag > 1) {
713 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)&dio[1];
714 rpl_dio_printopt(ndo, opt, length);
715 }
716 return;
717 trunc:
718 ND_PRINT((ndo," [|truncated]"));
719 return;
720 }
721
722 static void
rpl_dao_print(netdissect_options * ndo,const u_char * bp,u_int length)723 rpl_dao_print(netdissect_options *ndo,
724 const u_char *bp, u_int length)
725 {
726 const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
727 const char *dagid_str = "<elided>";
728
729 ND_TCHECK(*dao);
730 if (length < ND_RPL_DAO_MIN_LEN)
731 goto tooshort;
732
733 bp += ND_RPL_DAO_MIN_LEN;
734 length -= ND_RPL_DAO_MIN_LEN;
735 if(RPL_DAO_D(dao->rpl_flags)) {
736 ND_TCHECK2(dao->rpl_dagid, DAGID_LEN);
737 if (length < DAGID_LEN)
738 goto tooshort;
739 dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
740 bp += DAGID_LEN;
741 length -= DAGID_LEN;
742 }
743
744 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
745 dagid_str,
746 dao->rpl_daoseq,
747 dao->rpl_instanceid,
748 RPL_DAO_K(dao->rpl_flags) ? ",acK":"",
749 RPL_DAO_D(dao->rpl_flags) ? ",Dagid":"",
750 dao->rpl_flags));
751
752 if(ndo->ndo_vflag > 1) {
753 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
754 rpl_dio_printopt(ndo, opt, length);
755 }
756 return;
757
758 trunc:
759 ND_PRINT((ndo," [|truncated]"));
760 return;
761
762 tooshort:
763 ND_PRINT((ndo," [|length too short]"));
764 return;
765 }
766
767 static void
rpl_daoack_print(netdissect_options * ndo,const u_char * bp,u_int length)768 rpl_daoack_print(netdissect_options *ndo,
769 const u_char *bp, u_int length)
770 {
771 const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
772 const char *dagid_str = "<elided>";
773
774 ND_TCHECK2(*daoack, ND_RPL_DAOACK_MIN_LEN);
775 if (length < ND_RPL_DAOACK_MIN_LEN)
776 goto tooshort;
777
778 bp += ND_RPL_DAOACK_MIN_LEN;
779 length -= ND_RPL_DAOACK_MIN_LEN;
780 if(RPL_DAOACK_D(daoack->rpl_flags)) {
781 ND_TCHECK2(daoack->rpl_dagid, DAGID_LEN);
782 if (length < DAGID_LEN)
783 goto tooshort;
784 dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
785 bp += DAGID_LEN;
786 length -= DAGID_LEN;
787 }
788
789 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,status:%u]",
790 dagid_str,
791 daoack->rpl_daoseq,
792 daoack->rpl_instanceid,
793 daoack->rpl_status));
794
795 /* no officially defined options for DAOACK, but print any we find */
796 if(ndo->ndo_vflag > 1) {
797 const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
798 rpl_dio_printopt(ndo, opt, length);
799 }
800 return;
801
802 trunc:
803 ND_PRINT((ndo," [|dao-truncated]"));
804 return;
805
806 tooshort:
807 ND_PRINT((ndo," [|dao-length too short]"));
808 return;
809 }
810
811 static void
rpl_print(netdissect_options * ndo,const struct icmp6_hdr * hdr,const u_char * bp,u_int length)812 rpl_print(netdissect_options *ndo,
813 const struct icmp6_hdr *hdr,
814 const u_char *bp, u_int length)
815 {
816 int secured = hdr->icmp6_code & 0x80;
817 int basecode= hdr->icmp6_code & 0x7f;
818
819 if(secured) {
820 ND_PRINT((ndo, ", (SEC) [worktodo]"));
821 /* XXX
822 * the next header pointer needs to move forward to
823 * skip the secure part.
824 */
825 return;
826 } else {
827 ND_PRINT((ndo, ", (CLR)"));
828 }
829
830 switch(basecode) {
831 case ND_RPL_DAG_IS:
832 ND_PRINT((ndo, "DODAG Information Solicitation"));
833 if(ndo->ndo_vflag) {
834 }
835 break;
836 case ND_RPL_DAG_IO:
837 ND_PRINT((ndo, "DODAG Information Object"));
838 if(ndo->ndo_vflag) {
839 rpl_dio_print(ndo, bp, length);
840 }
841 break;
842 case ND_RPL_DAO:
843 ND_PRINT((ndo, "Destination Advertisement Object"));
844 if(ndo->ndo_vflag) {
845 rpl_dao_print(ndo, bp, length);
846 }
847 break;
848 case ND_RPL_DAO_ACK:
849 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
850 if(ndo->ndo_vflag) {
851 rpl_daoack_print(ndo, bp, length);
852 }
853 break;
854 default:
855 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
856 break;
857 }
858 return;
859
860 #if 0
861 trunc:
862 ND_PRINT((ndo," [|truncated]"));
863 return;
864 #endif
865
866 }
867
868
869 void
icmp6_print(netdissect_options * ndo,const u_char * bp,u_int length,const u_char * bp2,int fragmented)870 icmp6_print(netdissect_options *ndo,
871 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
872 {
873 const struct icmp6_hdr *dp;
874 const struct ip6_hdr *ip;
875 const struct ip6_hdr *oip;
876 const struct udphdr *ouh;
877 int dport;
878 const u_char *ep;
879 u_int prot;
880
881 dp = (const struct icmp6_hdr *)bp;
882 ip = (const struct ip6_hdr *)bp2;
883 oip = (const struct ip6_hdr *)(dp + 1);
884 /* 'ep' points to the end of available data. */
885 ep = ndo->ndo_snapend;
886
887 ND_TCHECK(dp->icmp6_cksum);
888
889 if (ndo->ndo_vflag && !fragmented) {
890 uint16_t sum, udp_sum;
891
892 if (ND_TTEST2(bp[0], length)) {
893 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
894 sum = icmp6_cksum(ndo, ip, dp, length);
895 if (sum != 0)
896 ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
897 udp_sum,
898 in_cksum_shouldbe(udp_sum, sum)));
899 else
900 ND_PRINT((ndo,"[icmp6 sum ok] "));
901 }
902 }
903
904 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)));
905
906 /* display cosmetics: print the packet length for printer that use the vflag now */
907 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
908 dp->icmp6_type == ND_ROUTER_ADVERT ||
909 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
910 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
911 dp->icmp6_type == ND_REDIRECT ||
912 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
913 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
914 ND_PRINT((ndo,", length %u", length));
915
916 switch (dp->icmp6_type) {
917 case ICMP6_DST_UNREACH:
918 ND_TCHECK(oip->ip6_dst);
919 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)));
920 switch (dp->icmp6_code) {
921
922 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
923 case ICMP6_DST_UNREACH_ADMIN:
924 case ICMP6_DST_UNREACH_ADDR:
925 ND_PRINT((ndo," %s",ip6addr_string(ndo, &oip->ip6_dst)));
926 break;
927 case ICMP6_DST_UNREACH_BEYONDSCOPE:
928 ND_PRINT((ndo," %s, source address %s",
929 ip6addr_string(ndo, &oip->ip6_dst),
930 ip6addr_string(ndo, &oip->ip6_src)));
931 break;
932 case ICMP6_DST_UNREACH_NOPORT:
933 if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
934 == NULL)
935 goto trunc;
936
937 dport = EXTRACT_16BITS(&ouh->uh_dport);
938 switch (prot) {
939 case IPPROTO_TCP:
940 ND_PRINT((ndo,", %s tcp port %s",
941 ip6addr_string(ndo, &oip->ip6_dst),
942 tcpport_string(ndo, dport)));
943 break;
944 case IPPROTO_UDP:
945 ND_PRINT((ndo,", %s udp port %s",
946 ip6addr_string(ndo, &oip->ip6_dst),
947 udpport_string(ndo, dport)));
948 break;
949 default:
950 ND_PRINT((ndo,", %s protocol %d port %d unreachable",
951 ip6addr_string(ndo, &oip->ip6_dst),
952 oip->ip6_nxt, dport));
953 break;
954 }
955 break;
956 default:
957 if (ndo->ndo_vflag <= 1) {
958 print_unknown_data(ndo, bp,"\n\t",length);
959 return;
960 }
961 break;
962 }
963 break;
964 case ICMP6_PACKET_TOO_BIG:
965 ND_TCHECK(dp->icmp6_mtu);
966 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
967 break;
968 case ICMP6_TIME_EXCEEDED:
969 ND_TCHECK(oip->ip6_dst);
970 switch (dp->icmp6_code) {
971 case ICMP6_TIME_EXCEED_TRANSIT:
972 ND_PRINT((ndo," for %s",
973 ip6addr_string(ndo, &oip->ip6_dst)));
974 break;
975 case ICMP6_TIME_EXCEED_REASSEMBLY:
976 ND_PRINT((ndo," (reassembly)"));
977 break;
978 default:
979 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
980 break;
981 }
982 break;
983 case ICMP6_PARAM_PROB:
984 ND_TCHECK(oip->ip6_dst);
985 switch (dp->icmp6_code) {
986 case ICMP6_PARAMPROB_HEADER:
987 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
988 break;
989 case ICMP6_PARAMPROB_NEXTHEADER:
990 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
991 break;
992 case ICMP6_PARAMPROB_OPTION:
993 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
994 break;
995 default:
996 ND_PRINT((ndo,", code-#%d",
997 dp->icmp6_code));
998 break;
999 }
1000 break;
1001 case ICMP6_ECHO_REQUEST:
1002 case ICMP6_ECHO_REPLY:
1003 ND_TCHECK(dp->icmp6_seq);
1004 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)));
1005 break;
1006 case ICMP6_MEMBERSHIP_QUERY:
1007 if (length == MLD_MINLEN) {
1008 mld6_print(ndo, (const u_char *)dp);
1009 } else if (length >= MLDV2_MINLEN) {
1010 ND_PRINT((ndo," v2"));
1011 mldv2_query_print(ndo, (const u_char *)dp, length);
1012 } else {
1013 ND_PRINT((ndo," unknown-version (len %u) ", length));
1014 }
1015 break;
1016 case ICMP6_MEMBERSHIP_REPORT:
1017 mld6_print(ndo, (const u_char *)dp);
1018 break;
1019 case ICMP6_MEMBERSHIP_REDUCTION:
1020 mld6_print(ndo, (const u_char *)dp);
1021 break;
1022 case ND_ROUTER_SOLICIT:
1023 #define RTSOLLEN 8
1024 if (ndo->ndo_vflag) {
1025 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
1026 length - RTSOLLEN);
1027 }
1028 break;
1029 case ND_ROUTER_ADVERT:
1030 #define RTADVLEN 16
1031 if (ndo->ndo_vflag) {
1032 const struct nd_router_advert *p;
1033
1034 p = (const struct nd_router_advert *)dp;
1035 ND_TCHECK(p->nd_ra_retransmit);
1036 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
1037 ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
1038 (u_int)p->nd_ra_curhoplimit,
1039 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
1040 get_rtpref(p->nd_ra_flags_reserved),
1041 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
1042 EXTRACT_32BITS(&p->nd_ra_reachable),
1043 EXTRACT_32BITS(&p->nd_ra_retransmit)));
1044
1045 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
1046 length - RTADVLEN);
1047 }
1048 break;
1049 case ND_NEIGHBOR_SOLICIT:
1050 {
1051 const struct nd_neighbor_solicit *p;
1052 p = (const struct nd_neighbor_solicit *)dp;
1053 ND_TCHECK(p->nd_ns_target);
1054 ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target)));
1055 if (ndo->ndo_vflag) {
1056 #define NDSOLLEN 24
1057 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
1058 length - NDSOLLEN);
1059 }
1060 }
1061 break;
1062 case ND_NEIGHBOR_ADVERT:
1063 {
1064 const struct nd_neighbor_advert *p;
1065
1066 p = (const struct nd_neighbor_advert *)dp;
1067 ND_TCHECK(p->nd_na_target);
1068 ND_PRINT((ndo,", tgt is %s",
1069 ip6addr_string(ndo, &p->nd_na_target)));
1070 if (ndo->ndo_vflag) {
1071 ND_PRINT((ndo,", Flags [%s]",
1072 bittok2str(icmp6_nd_na_flag_values,
1073 "none",
1074 EXTRACT_32BITS(&p->nd_na_flags_reserved))));
1075 #define NDADVLEN 24
1076 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
1077 length - NDADVLEN);
1078 #undef NDADVLEN
1079 }
1080 }
1081 break;
1082 case ND_REDIRECT:
1083 #define RDR(i) ((const struct nd_redirect *)(i))
1084 ND_TCHECK(RDR(dp)->nd_rd_dst);
1085 ND_PRINT((ndo,", %s", ip6addr_string(ndo, &RDR(dp)->nd_rd_dst)));
1086 ND_TCHECK(RDR(dp)->nd_rd_target);
1087 ND_PRINT((ndo," to %s",
1088 ip6addr_string(ndo, &RDR(dp)->nd_rd_target)));
1089 #define REDIRECTLEN 40
1090 if (ndo->ndo_vflag) {
1091 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
1092 length - REDIRECTLEN);
1093 }
1094 break;
1095 #undef REDIRECTLEN
1096 #undef RDR
1097 case ICMP6_ROUTER_RENUMBERING:
1098 icmp6_rrenum_print(ndo, bp, ep);
1099 break;
1100 case ICMP6_NI_QUERY:
1101 case ICMP6_NI_REPLY:
1102 icmp6_nodeinfo_print(ndo, length, bp, ep);
1103 break;
1104 case IND_SOLICIT:
1105 case IND_ADVERT:
1106 break;
1107 case ICMP6_V2_MEMBERSHIP_REPORT:
1108 mldv2_report_print(ndo, (const u_char *) dp, length);
1109 break;
1110 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
1111 case ICMP6_HADISCOV_REQUEST:
1112 ND_TCHECK(dp->icmp6_data16[0]);
1113 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1114 break;
1115 case ICMP6_HADISCOV_REPLY:
1116 if (ndo->ndo_vflag) {
1117 const struct in6_addr *in6;
1118 const u_char *cp;
1119
1120 ND_TCHECK(dp->icmp6_data16[0]);
1121 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1122 cp = (const u_char *)dp + length;
1123 in6 = (const struct in6_addr *)(dp + 1);
1124 for (; (const u_char *)in6 < cp; in6++) {
1125 ND_TCHECK(*in6);
1126 ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6)));
1127 }
1128 }
1129 break;
1130 case ICMP6_MOBILEPREFIX_ADVERT:
1131 if (ndo->ndo_vflag) {
1132 ND_TCHECK(dp->icmp6_data16[0]);
1133 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1134 ND_TCHECK(dp->icmp6_data16[1]);
1135 if (dp->icmp6_data16[1] & 0xc0)
1136 ND_PRINT((ndo," "));
1137 if (dp->icmp6_data16[1] & 0x80)
1138 ND_PRINT((ndo,"M"));
1139 if (dp->icmp6_data16[1] & 0x40)
1140 ND_PRINT((ndo,"O"));
1141 #define MPADVLEN 8
1142 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1143 length - MPADVLEN);
1144 }
1145 break;
1146 case ND_RPL_MESSAGE:
1147 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
1148 rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4);
1149 break;
1150 default:
1151 ND_PRINT((ndo,", length %u", length));
1152 if (ndo->ndo_vflag <= 1)
1153 print_unknown_data(ndo, bp,"\n\t", length);
1154 return;
1155 }
1156 if (!ndo->ndo_vflag)
1157 ND_PRINT((ndo,", length %u", length));
1158 return;
1159 trunc:
1160 ND_PRINT((ndo, "[|icmp6]"));
1161 }
1162
1163 static const struct udphdr *
get_upperlayer(netdissect_options * ndo,const u_char * bp,u_int * prot)1164 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
1165 {
1166 const u_char *ep;
1167 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
1168 const struct udphdr *uh;
1169 const struct ip6_hbh *hbh;
1170 const struct ip6_frag *fragh;
1171 const struct ah *ah;
1172 u_int nh;
1173 int hlen;
1174
1175 /* 'ep' points to the end of available data. */
1176 ep = ndo->ndo_snapend;
1177
1178 if (!ND_TTEST(ip6->ip6_nxt))
1179 return NULL;
1180
1181 nh = ip6->ip6_nxt;
1182 hlen = sizeof(struct ip6_hdr);
1183
1184 while (bp < ep) {
1185 bp += hlen;
1186
1187 switch(nh) {
1188 case IPPROTO_UDP:
1189 case IPPROTO_TCP:
1190 uh = (const struct udphdr *)bp;
1191 if (ND_TTEST(uh->uh_dport)) {
1192 *prot = nh;
1193 return(uh);
1194 }
1195 else
1196 return(NULL);
1197 /* NOTREACHED */
1198
1199 case IPPROTO_HOPOPTS:
1200 case IPPROTO_DSTOPTS:
1201 case IPPROTO_ROUTING:
1202 hbh = (const struct ip6_hbh *)bp;
1203 if (!ND_TTEST(hbh->ip6h_len))
1204 return(NULL);
1205 nh = hbh->ip6h_nxt;
1206 hlen = (hbh->ip6h_len + 1) << 3;
1207 break;
1208
1209 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1210 fragh = (const struct ip6_frag *)bp;
1211 if (!ND_TTEST(fragh->ip6f_offlg))
1212 return(NULL);
1213 /* fragments with non-zero offset are meaningless */
1214 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1215 return(NULL);
1216 nh = fragh->ip6f_nxt;
1217 hlen = sizeof(struct ip6_frag);
1218 break;
1219
1220 case IPPROTO_AH:
1221 ah = (const struct ah *)bp;
1222 if (!ND_TTEST(ah->ah_len))
1223 return(NULL);
1224 nh = ah->ah_nxt;
1225 hlen = (ah->ah_len + 2) << 2;
1226 break;
1227
1228 default: /* unknown or undecodable header */
1229 *prot = nh; /* meaningless, but set here anyway */
1230 return(NULL);
1231 }
1232 }
1233
1234 return(NULL); /* should be notreached, though */
1235 }
1236
1237 static void
icmp6_opt_print(netdissect_options * ndo,const u_char * bp,int resid)1238 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1239 {
1240 const struct nd_opt_hdr *op;
1241 const struct nd_opt_prefix_info *opp;
1242 const struct nd_opt_mtu *opm;
1243 const struct nd_opt_rdnss *oprd;
1244 const struct nd_opt_dnssl *opds;
1245 const struct nd_opt_advinterval *opa;
1246 const struct nd_opt_homeagent_info *oph;
1247 const struct nd_opt_route_info *opri;
1248 const u_char *cp, *ep, *domp;
1249 struct in6_addr in6;
1250 const struct in6_addr *in6p;
1251 size_t l;
1252 u_int i;
1253
1254 #define ECHECK(var) if ((const u_char *)&(var) > ep - sizeof(var)) return
1255
1256 cp = bp;
1257 /* 'ep' points to the end of available data. */
1258 ep = ndo->ndo_snapend;
1259
1260 while (cp < ep) {
1261 op = (const struct nd_opt_hdr *)cp;
1262
1263 ECHECK(op->nd_opt_len);
1264 if (resid <= 0)
1265 return;
1266 if (op->nd_opt_len == 0)
1267 goto trunc;
1268 if (cp + (op->nd_opt_len << 3) > ep)
1269 goto trunc;
1270
1271 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ",
1272 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
1273 op->nd_opt_type,
1274 op->nd_opt_len << 3,
1275 op->nd_opt_len));
1276
1277 switch (op->nd_opt_type) {
1278 case ND_OPT_SOURCE_LINKADDR:
1279 l = (op->nd_opt_len << 3) - 2;
1280 print_lladdr(ndo, cp + 2, l);
1281 break;
1282 case ND_OPT_TARGET_LINKADDR:
1283 l = (op->nd_opt_len << 3) - 2;
1284 print_lladdr(ndo, cp + 2, l);
1285 break;
1286 case ND_OPT_PREFIX_INFORMATION:
1287 opp = (const struct nd_opt_prefix_info *)op;
1288 ND_TCHECK(opp->nd_opt_pi_prefix);
1289 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
1290 ip6addr_string(ndo, &opp->nd_opt_pi_prefix),
1291 opp->nd_opt_pi_prefix_len,
1292 (op->nd_opt_len != 4) ? "badlen" : "",
1293 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
1294 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))));
1295 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))));
1296 break;
1297 case ND_OPT_REDIRECTED_HEADER:
1298 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3);
1299 /* xxx */
1300 break;
1301 case ND_OPT_MTU:
1302 opm = (const struct nd_opt_mtu *)op;
1303 ND_TCHECK(opm->nd_opt_mtu_mtu);
1304 ND_PRINT((ndo," %u%s",
1305 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
1306 (op->nd_opt_len != 1) ? "bad option length" : "" ));
1307 break;
1308 case ND_OPT_RDNSS:
1309 oprd = (const struct nd_opt_rdnss *)op;
1310 l = (op->nd_opt_len - 1) / 2;
1311 ND_PRINT((ndo," lifetime %us,",
1312 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
1313 for (i = 0; i < l; i++) {
1314 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]);
1315 ND_PRINT((ndo," addr: %s",
1316 ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i])));
1317 }
1318 break;
1319 case ND_OPT_DNSSL:
1320 opds = (const struct nd_opt_dnssl *)op;
1321 ND_PRINT((ndo," lifetime %us, domain(s):",
1322 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
1323 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1324 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
1325 {
1326 ND_PRINT((ndo, " "));
1327 if ((domp = ns_nprint (ndo, domp, bp)) == NULL)
1328 goto trunc;
1329 }
1330 break;
1331 case ND_OPT_ADVINTERVAL:
1332 opa = (const struct nd_opt_advinterval *)op;
1333 ND_TCHECK(opa->nd_opt_adv_interval);
1334 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
1335 break;
1336 case ND_OPT_HOMEAGENT_INFO:
1337 oph = (const struct nd_opt_homeagent_info *)op;
1338 ND_TCHECK(oph->nd_opt_hai_lifetime);
1339 ND_PRINT((ndo," preference %u, lifetime %u",
1340 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
1341 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
1342 break;
1343 case ND_OPT_ROUTE_INFO:
1344 opri = (const struct nd_opt_route_info *)op;
1345 ND_TCHECK(opri->nd_opt_rti_lifetime);
1346 memset(&in6, 0, sizeof(in6));
1347 in6p = (const struct in6_addr *)(opri + 1);
1348 switch (op->nd_opt_len) {
1349 case 1:
1350 break;
1351 case 2:
1352 ND_TCHECK2(*in6p, 8);
1353 memcpy(&in6, opri + 1, 8);
1354 break;
1355 case 3:
1356 ND_TCHECK(*in6p);
1357 memcpy(&in6, opri + 1, sizeof(in6));
1358 break;
1359 default:
1360 goto trunc;
1361 }
1362 ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6),
1363 opri->nd_opt_rti_prefixlen));
1364 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags)));
1365 ND_PRINT((ndo,", lifetime=%s",
1366 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))));
1367 break;
1368 default:
1369 if (ndo->ndo_vflag <= 1) {
1370 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1371 return;
1372 }
1373 break;
1374 }
1375 /* do we want to see an additional hexdump ? */
1376 if (ndo->ndo_vflag> 1)
1377 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1378
1379 cp += op->nd_opt_len << 3;
1380 resid -= op->nd_opt_len << 3;
1381 }
1382 return;
1383
1384 trunc:
1385 ND_PRINT((ndo, "[ndp opt]"));
1386 return;
1387 #undef ECHECK
1388 }
1389
1390 static void
mld6_print(netdissect_options * ndo,const u_char * bp)1391 mld6_print(netdissect_options *ndo, const u_char *bp)
1392 {
1393 const struct mld6_hdr *mp = (const struct mld6_hdr *)bp;
1394 const u_char *ep;
1395
1396 /* 'ep' points to the end of available data. */
1397 ep = ndo->ndo_snapend;
1398
1399 if ((const u_char *)mp + sizeof(*mp) > ep)
1400 return;
1401
1402 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
1403 ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &mp->mld6_addr)));
1404 }
1405
1406 static void
mldv2_report_print(netdissect_options * ndo,const u_char * bp,u_int len)1407 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1408 {
1409 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1410 u_int group, nsrcs, ngroups;
1411 u_int i, j;
1412
1413 /* Minimum len is 8 */
1414 if (len < 8) {
1415 ND_PRINT((ndo," [invalid len %d]", len));
1416 return;
1417 }
1418
1419 ND_TCHECK(icp->icmp6_data16[1]);
1420 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
1421 ND_PRINT((ndo,", %d group record(s)", ngroups));
1422 if (ndo->ndo_vflag > 0) {
1423 /* Print the group records */
1424 group = 8;
1425 for (i = 0; i < ngroups; i++) {
1426 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1427 if (len < group + 20) {
1428 ND_PRINT((ndo," [invalid number of groups]"));
1429 return;
1430 }
1431 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr));
1432 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4])));
1433 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]",
1434 bp[group])));
1435 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
1436 /* Check the number of sources and print them */
1437 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
1438 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
1439 return;
1440 }
1441 if (ndo->ndo_vflag == 1)
1442 ND_PRINT((ndo,", %d source(s)", nsrcs));
1443 else {
1444 /* Print the sources */
1445 ND_PRINT((ndo," {"));
1446 for (j = 0; j < nsrcs; j++) {
1447 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
1448 sizeof(struct in6_addr));
1449 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)])));
1450 }
1451 ND_PRINT((ndo," }"));
1452 }
1453 /* Next group record */
1454 group += 20 + nsrcs * sizeof(struct in6_addr);
1455 ND_PRINT((ndo,"]"));
1456 }
1457 }
1458 return;
1459 trunc:
1460 ND_PRINT((ndo,"[|icmp6]"));
1461 return;
1462 }
1463
1464 static void
mldv2_query_print(netdissect_options * ndo,const u_char * bp,u_int len)1465 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1466 {
1467 const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
1468 u_int mrc;
1469 int mrt, qqi;
1470 u_int nsrcs;
1471 register u_int i;
1472
1473 /* Minimum len is 28 */
1474 if (len < 28) {
1475 ND_PRINT((ndo," [invalid len %d]", len));
1476 return;
1477 }
1478 ND_TCHECK(icp->icmp6_data16[0]);
1479 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
1480 if (mrc < 32768) {
1481 mrt = mrc;
1482 } else {
1483 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1484 }
1485 if (ndo->ndo_vflag) {
1486 ND_PRINT((ndo," [max resp delay=%d]", mrt));
1487 }
1488 ND_TCHECK2(bp[8], sizeof(struct in6_addr));
1489 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8])));
1490
1491 if (ndo->ndo_vflag) {
1492 ND_TCHECK(bp[25]);
1493 if (bp[24] & 0x08) {
1494 ND_PRINT((ndo," sflag"));
1495 }
1496 if (bp[24] & 0x07) {
1497 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07));
1498 }
1499 if (bp[25] < 128) {
1500 qqi = bp[25];
1501 } else {
1502 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
1503 }
1504 ND_PRINT((ndo," qqi=%d", qqi));
1505 }
1506
1507 ND_TCHECK2(bp[26], 2);
1508 nsrcs = EXTRACT_16BITS(&bp[26]);
1509 if (nsrcs > 0) {
1510 if (len < 28 + nsrcs * sizeof(struct in6_addr))
1511 ND_PRINT((ndo," [invalid number of sources]"));
1512 else if (ndo->ndo_vflag > 1) {
1513 ND_PRINT((ndo," {"));
1514 for (i = 0; i < nsrcs; i++) {
1515 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
1516 sizeof(struct in6_addr));
1517 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)])));
1518 }
1519 ND_PRINT((ndo," }"));
1520 } else
1521 ND_PRINT((ndo,", %d source(s)", nsrcs));
1522 }
1523 ND_PRINT((ndo,"]"));
1524 return;
1525 trunc:
1526 ND_PRINT((ndo,"[|icmp6]"));
1527 return;
1528 }
1529
1530 static void
dnsname_print(netdissect_options * ndo,const u_char * cp,const u_char * ep)1531 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1532 {
1533 int i;
1534
1535 /* DNS name decoding - no decompression */
1536 ND_PRINT((ndo,", \""));
1537 while (cp < ep) {
1538 i = *cp++;
1539 if (i) {
1540 if (i > ep - cp) {
1541 ND_PRINT((ndo,"???"));
1542 break;
1543 }
1544 while (i-- && cp < ep) {
1545 safeputchar(ndo, *cp);
1546 cp++;
1547 }
1548 if (cp + 1 < ep && *cp)
1549 ND_PRINT((ndo,"."));
1550 } else {
1551 if (cp == ep) {
1552 /* FQDN */
1553 ND_PRINT((ndo,"."));
1554 } else if (cp + 1 == ep && *cp == '\0') {
1555 /* truncated */
1556 } else {
1557 /* invalid */
1558 ND_PRINT((ndo,"???"));
1559 }
1560 break;
1561 }
1562 }
1563 ND_PRINT((ndo,"\""));
1564 }
1565
1566 static void
icmp6_nodeinfo_print(netdissect_options * ndo,u_int icmp6len,const u_char * bp,const u_char * ep)1567 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1568 {
1569 const struct icmp6_nodeinfo *ni6;
1570 const struct icmp6_hdr *dp;
1571 const u_char *cp;
1572 size_t siz, i;
1573 int needcomma;
1574
1575 if (ep < bp)
1576 return;
1577 dp = (const struct icmp6_hdr *)bp;
1578 ni6 = (const struct icmp6_nodeinfo *)bp;
1579 siz = ep - bp;
1580
1581 switch (ni6->ni_type) {
1582 case ICMP6_NI_QUERY:
1583 if (siz == sizeof(*dp) + 4) {
1584 /* KAME who-are-you */
1585 ND_PRINT((ndo," who-are-you request"));
1586 break;
1587 }
1588 ND_PRINT((ndo," node information query"));
1589
1590 ND_TCHECK2(*dp, sizeof(*ni6));
1591 ni6 = (const struct icmp6_nodeinfo *)dp;
1592 ND_PRINT((ndo," (")); /*)*/
1593 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1594 case NI_QTYPE_NOOP:
1595 ND_PRINT((ndo,"noop"));
1596 break;
1597 case NI_QTYPE_SUPTYPES:
1598 ND_PRINT((ndo,"supported qtypes"));
1599 i = EXTRACT_16BITS(&ni6->ni_flags);
1600 if (i)
1601 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1602 break;
1603 case NI_QTYPE_FQDN:
1604 ND_PRINT((ndo,"DNS name"));
1605 break;
1606 case NI_QTYPE_NODEADDR:
1607 ND_PRINT((ndo,"node addresses"));
1608 i = ni6->ni_flags;
1609 if (!i)
1610 break;
1611 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1612 ND_PRINT((ndo," [%s%s%s%s%s%s]",
1613 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1614 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1615 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1616 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1617 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1618 (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""));
1619 break;
1620 default:
1621 ND_PRINT((ndo,"unknown"));
1622 break;
1623 }
1624
1625 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1626 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1627 if (siz != sizeof(*ni6))
1628 if (ndo->ndo_vflag)
1629 ND_PRINT((ndo,", invalid len"));
1630 /*(*/
1631 ND_PRINT((ndo,")"));
1632 break;
1633 }
1634
1635
1636 /* XXX backward compat, icmp-name-lookup-03 */
1637 if (siz == sizeof(*ni6)) {
1638 ND_PRINT((ndo,", 03 draft"));
1639 /*(*/
1640 ND_PRINT((ndo,")"));
1641 break;
1642 }
1643
1644 switch (ni6->ni_code) {
1645 case ICMP6_NI_SUBJ_IPV6:
1646 if (!ND_TTEST2(*dp,
1647 sizeof(*ni6) + sizeof(struct in6_addr)))
1648 break;
1649 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1650 if (ndo->ndo_vflag)
1651 ND_PRINT((ndo,", invalid subject len"));
1652 break;
1653 }
1654 ND_PRINT((ndo,", subject=%s",
1655 ip6addr_string(ndo, ni6 + 1)));
1656 break;
1657 case ICMP6_NI_SUBJ_FQDN:
1658 ND_PRINT((ndo,", subject=DNS name"));
1659 cp = (const u_char *)(ni6 + 1);
1660 if (cp[0] == ep - cp - 1) {
1661 /* icmp-name-lookup-03, pascal string */
1662 if (ndo->ndo_vflag)
1663 ND_PRINT((ndo,", 03 draft"));
1664 cp++;
1665 ND_PRINT((ndo,", \""));
1666 while (cp < ep) {
1667 safeputchar(ndo, *cp);
1668 cp++;
1669 }
1670 ND_PRINT((ndo,"\""));
1671 } else
1672 dnsname_print(ndo, cp, ep);
1673 break;
1674 case ICMP6_NI_SUBJ_IPV4:
1675 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1676 break;
1677 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1678 if (ndo->ndo_vflag)
1679 ND_PRINT((ndo,", invalid subject len"));
1680 break;
1681 }
1682 ND_PRINT((ndo,", subject=%s",
1683 ipaddr_string(ndo, ni6 + 1)));
1684 break;
1685 default:
1686 ND_PRINT((ndo,", unknown subject"));
1687 break;
1688 }
1689
1690 /*(*/
1691 ND_PRINT((ndo,")"));
1692 break;
1693
1694 case ICMP6_NI_REPLY:
1695 if (icmp6len > siz) {
1696 ND_PRINT((ndo,"[|icmp6: node information reply]"));
1697 break;
1698 }
1699
1700 needcomma = 0;
1701
1702 ND_TCHECK2(*dp, sizeof(*ni6));
1703 ni6 = (const struct icmp6_nodeinfo *)dp;
1704 ND_PRINT((ndo," node information reply"));
1705 ND_PRINT((ndo," (")); /*)*/
1706 switch (ni6->ni_code) {
1707 case ICMP6_NI_SUCCESS:
1708 if (ndo->ndo_vflag) {
1709 ND_PRINT((ndo,"success"));
1710 needcomma++;
1711 }
1712 break;
1713 case ICMP6_NI_REFUSED:
1714 ND_PRINT((ndo,"refused"));
1715 needcomma++;
1716 if (siz != sizeof(*ni6))
1717 if (ndo->ndo_vflag)
1718 ND_PRINT((ndo,", invalid length"));
1719 break;
1720 case ICMP6_NI_UNKNOWN:
1721 ND_PRINT((ndo,"unknown"));
1722 needcomma++;
1723 if (siz != sizeof(*ni6))
1724 if (ndo->ndo_vflag)
1725 ND_PRINT((ndo,", invalid length"));
1726 break;
1727 }
1728
1729 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1730 /*(*/
1731 ND_PRINT((ndo,")"));
1732 break;
1733 }
1734
1735 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1736 case NI_QTYPE_NOOP:
1737 if (needcomma)
1738 ND_PRINT((ndo,", "));
1739 ND_PRINT((ndo,"noop"));
1740 if (siz != sizeof(*ni6))
1741 if (ndo->ndo_vflag)
1742 ND_PRINT((ndo,", invalid length"));
1743 break;
1744 case NI_QTYPE_SUPTYPES:
1745 if (needcomma)
1746 ND_PRINT((ndo,", "));
1747 ND_PRINT((ndo,"supported qtypes"));
1748 i = EXTRACT_16BITS(&ni6->ni_flags);
1749 if (i)
1750 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1751 break;
1752 case NI_QTYPE_FQDN:
1753 if (needcomma)
1754 ND_PRINT((ndo,", "));
1755 ND_PRINT((ndo,"DNS name"));
1756 cp = (const u_char *)(ni6 + 1) + 4;
1757 ND_TCHECK(cp[0]);
1758 if (cp[0] == ep - cp - 1) {
1759 /* icmp-name-lookup-03, pascal string */
1760 if (ndo->ndo_vflag)
1761 ND_PRINT((ndo,", 03 draft"));
1762 cp++;
1763 ND_PRINT((ndo,", \""));
1764 while (cp < ep) {
1765 safeputchar(ndo, *cp);
1766 cp++;
1767 }
1768 ND_PRINT((ndo,"\""));
1769 } else
1770 dnsname_print(ndo, cp, ep);
1771 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1772 ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1)));
1773 break;
1774 case NI_QTYPE_NODEADDR:
1775 if (needcomma)
1776 ND_PRINT((ndo,", "));
1777 ND_PRINT((ndo,"node addresses"));
1778 i = sizeof(*ni6);
1779 while (i < siz) {
1780 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1781 break;
1782 ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i)));
1783 i += sizeof(struct in6_addr);
1784 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
1785 i += sizeof(int32_t);
1786 }
1787 i = ni6->ni_flags;
1788 if (!i)
1789 break;
1790 ND_PRINT((ndo," [%s%s%s%s%s%s%s]",
1791 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1792 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1793 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1794 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1795 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1796 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1797 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""));
1798 break;
1799 default:
1800 if (needcomma)
1801 ND_PRINT((ndo,", "));
1802 ND_PRINT((ndo,"unknown"));
1803 break;
1804 }
1805
1806 /*(*/
1807 ND_PRINT((ndo,")"));
1808 break;
1809 }
1810 return;
1811
1812 trunc:
1813 ND_PRINT((ndo, "[|icmp6]"));
1814 }
1815
1816 static void
icmp6_rrenum_print(netdissect_options * ndo,const u_char * bp,const u_char * ep)1817 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1818 {
1819 const struct icmp6_router_renum *rr6;
1820 const char *cp;
1821 const struct rr_pco_match *match;
1822 const struct rr_pco_use *use;
1823 char hbuf[NI_MAXHOST];
1824 int n;
1825
1826 if (ep < bp)
1827 return;
1828 rr6 = (const struct icmp6_router_renum *)bp;
1829 cp = (const char *)(rr6 + 1);
1830
1831 ND_TCHECK(rr6->rr_reserved);
1832 switch (rr6->rr_code) {
1833 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1834 ND_PRINT((ndo,"router renum: command"));
1835 break;
1836 case ICMP6_ROUTER_RENUMBERING_RESULT:
1837 ND_PRINT((ndo,"router renum: result"));
1838 break;
1839 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1840 ND_PRINT((ndo,"router renum: sequence number reset"));
1841 break;
1842 default:
1843 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
1844 break;
1845 }
1846
1847 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
1848
1849 if (ndo->ndo_vflag) {
1850 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1851 ND_PRINT((ndo,"[")); /*]*/
1852 if (rr6->rr_flags) {
1853 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1854 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1855 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1856 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1857 F(ICMP6_RR_FLAGS_PREVDONE, "P")));
1858 }
1859 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum));
1860 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
1861 if (rr6->rr_reserved)
1862 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
1863 /*[*/
1864 ND_PRINT((ndo,"]"));
1865 #undef F
1866 }
1867
1868 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1869 match = (const struct rr_pco_match *)cp;
1870 cp = (const char *)(match + 1);
1871
1872 ND_TCHECK(match->rpm_prefix);
1873
1874 if (ndo->ndo_vflag > 1)
1875 ND_PRINT((ndo,"\n\t"));
1876 else
1877 ND_PRINT((ndo," "));
1878 ND_PRINT((ndo,"match(")); /*)*/
1879 switch (match->rpm_code) {
1880 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break;
1881 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break;
1882 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break;
1883 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break;
1884 }
1885
1886 if (ndo->ndo_vflag) {
1887 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal));
1888 ND_PRINT((ndo,",min=%u", match->rpm_minlen));
1889 ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
1890 }
1891 if (addrtostr6(&match->rpm_prefix, hbuf, sizeof(hbuf)))
1892 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
1893 else
1894 ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
1895 /*(*/
1896 ND_PRINT((ndo,")"));
1897
1898 n = match->rpm_len - 3;
1899 if (n % 4)
1900 goto trunc;
1901 n /= 4;
1902 while (n-- > 0) {
1903 use = (const struct rr_pco_use *)cp;
1904 cp = (const char *)(use + 1);
1905
1906 ND_TCHECK(use->rpu_prefix);
1907
1908 if (ndo->ndo_vflag > 1)
1909 ND_PRINT((ndo,"\n\t"));
1910 else
1911 ND_PRINT((ndo," "));
1912 ND_PRINT((ndo,"use(")); /*)*/
1913 if (use->rpu_flags) {
1914 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1915 ND_PRINT((ndo,"%s%s,",
1916 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1917 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")));
1918 #undef F
1919 }
1920 if (ndo->ndo_vflag) {
1921 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask));
1922 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags));
1923 if (~use->rpu_vltime == 0)
1924 ND_PRINT((ndo,"vltime=infty,"));
1925 else
1926 ND_PRINT((ndo,"vltime=%u,",
1927 EXTRACT_32BITS(&use->rpu_vltime)));
1928 if (~use->rpu_pltime == 0)
1929 ND_PRINT((ndo,"pltime=infty,"));
1930 else
1931 ND_PRINT((ndo,"pltime=%u,",
1932 EXTRACT_32BITS(&use->rpu_pltime)));
1933 }
1934 if (addrtostr6(&use->rpu_prefix, hbuf, sizeof(hbuf)))
1935 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
1936 use->rpu_keeplen));
1937 else
1938 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
1939 use->rpu_keeplen));
1940 /*(*/
1941 ND_PRINT((ndo,")"));
1942 }
1943 }
1944
1945 return;
1946
1947 trunc:
1948 ND_PRINT((ndo,"[|icmp6]"));
1949 }
1950
1951 /*
1952 * Local Variables:
1953 * c-style: whitesmith
1954 * c-basic-offset: 8
1955 * End:
1956 */
1957