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 #define NETDISSECT_REWORKED
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #ifdef INET6
28
29 #include <tcpdump-stdinc.h>
30
31 #include <stdio.h>
32 #include <string.h>
33
34 #include "interface.h"
35 #include "addrtoname.h"
36 #include "extract.h"
37
38 #include "ip6.h"
39 #include "ipproto.h"
40
41 #include "udp.h"
42 #include "ah.h"
43
44 /* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
45 /* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
46
47 /*
48 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
49 * All rights reserved.
50 *
51 * Redistribution and use in source and binary forms, with or without
52 * modification, are permitted provided that the following conditions
53 * are met:
54 * 1. Redistributions of source code must retain the above copyright
55 * notice, this list of conditions and the following disclaimer.
56 * 2. Redistributions in binary form must reproduce the above copyright
57 * notice, this list of conditions and the following disclaimer in the
58 * documentation and/or other materials provided with the distribution.
59 * 3. Neither the name of the project nor the names of its contributors
60 * may be used to endorse or promote products derived from this software
61 * without specific prior written permission.
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 * SUCH DAMAGE.
74 */
75
76 struct icmp6_hdr {
77 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 uint8_t nd_opt_pi_type;
288 uint8_t nd_opt_pi_len;
289 uint8_t nd_opt_pi_prefix_len;
290 uint8_t nd_opt_pi_flags_reserved;
291 uint8_t nd_opt_pi_valid_time[4];
292 uint8_t nd_opt_pi_preferred_time[4];
293 uint8_t nd_opt_pi_reserved2[4];
294 struct in6_addr nd_opt_pi_prefix;
295 };
296
297 #define ND_OPT_PI_FLAG_ONLINK 0x80
298 #define ND_OPT_PI_FLAG_AUTO 0x40
299 #define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
300
301 struct nd_opt_rd_hdr { /* redirected header */
302 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(const struct ip6_hdr * ip6,const struct icmp6_hdr * icp,u_int len)625 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
626 u_int len)
627 {
628 return nextproto6_cksum(ip6, (const uint8_t *)(void *)icp, len, len,
629 IPPROTO_ICMPV6);
630 }
631
632 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 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_format_dagid(char dagid_str[65],const u_char * dagid)654 rpl_format_dagid(char dagid_str[65], const u_char *dagid)
655 {
656 char *d = dagid_str;
657 int i;
658
659 for(i=0;i<16;i++) {
660 if(isprint(dagid[i])) {
661 *d++ = dagid[i];
662 } else {
663 snprintf(d,5,"0x%02x", dagid[i]); /* 4 + null char */
664 d += 4;
665 }
666 }
667 *d++ = '\0';
668 }
669
670 static void
rpl_dio_printopt(netdissect_options * ndo,const struct rpl_dio_genoption * opt,u_int length)671 rpl_dio_printopt(netdissect_options *ndo,
672 const struct rpl_dio_genoption *opt,
673 u_int length)
674 {
675 if(length < RPL_DIO_GENOPTION_LEN) return;
676 length -= RPL_DIO_GENOPTION_LEN;
677
678 ND_TCHECK(opt->rpl_dio_len);
679
680 while((opt->rpl_dio_type == RPL_OPT_PAD0 &&
681 (u_char *)opt < ndo->ndo_snapend) ||
682 ND_TTEST2(*opt,(opt->rpl_dio_len+2))) {
683
684 unsigned int optlen = opt->rpl_dio_len+2;
685 if(opt->rpl_dio_type == RPL_OPT_PAD0) {
686 optlen = 1;
687 ND_PRINT((ndo, " opt:pad0"));
688 } else {
689 ND_PRINT((ndo, " opt:%s len:%u ",
690 tok2str(rpl_subopt_values, "%subopt:%u", opt->rpl_dio_type),
691 optlen));
692 if(ndo->ndo_vflag > 2) {
693 unsigned int paylen = opt->rpl_dio_len;
694 if(paylen > length) paylen = length;
695 hex_print(ndo,
696 " ",
697 ((uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */
698 paylen);
699 }
700 }
701 opt = (struct rpl_dio_genoption *)(((char *)opt) + optlen);
702 length -= optlen;
703 }
704 return;
705 trunc:
706 ND_PRINT((ndo," [|truncated]"));
707 return;
708 }
709
710 static void
rpl_dio_print(netdissect_options * ndo,const u_char * bp,u_int length)711 rpl_dio_print(netdissect_options *ndo,
712 const u_char *bp, u_int length)
713 {
714 const struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
715 char dagid_str[65];
716
717 ND_TCHECK(*dio);
718 rpl_format_dagid(dagid_str, dio->rpl_dagid);
719
720 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
721 dagid_str,
722 dio->rpl_dtsn,
723 dio->rpl_instanceid,
724 EXTRACT_16BITS(&dio->rpl_dagrank),
725 RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"",
726 tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(dio->rpl_mopprf)),
727 RPL_DIO_PRF(dio->rpl_mopprf)));
728
729 if(ndo->ndo_vflag > 1) {
730 struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)&dio[1];
731 rpl_dio_printopt(ndo, opt, length);
732 }
733 return;
734 trunc:
735 ND_PRINT((ndo," [|truncated]"));
736 return;
737 }
738
739 static void
rpl_dao_print(netdissect_options * ndo,const u_char * bp,u_int length)740 rpl_dao_print(netdissect_options *ndo,
741 const u_char *bp, u_int length)
742 {
743 const struct nd_rpl_dao *dao = (struct nd_rpl_dao *)bp;
744 char dagid_str[65];
745
746 ND_TCHECK(*dao);
747 if (length < ND_RPL_DAO_MIN_LEN)
748 goto tooshort;
749
750 strcpy(dagid_str,"<elided>");
751 bp += ND_RPL_DAO_MIN_LEN;
752 length -= ND_RPL_DAO_MIN_LEN;
753 if(RPL_DAO_D(dao->rpl_flags)) {
754 ND_TCHECK2(dao->rpl_dagid, DAGID_LEN);
755 if (length < DAGID_LEN)
756 goto tooshort;
757 rpl_format_dagid(dagid_str, dao->rpl_dagid);
758 bp += DAGID_LEN;
759 length -= DAGID_LEN;
760 }
761
762 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
763 dagid_str,
764 dao->rpl_daoseq,
765 dao->rpl_instanceid,
766 RPL_DAO_K(dao->rpl_flags) ? ",acK":"",
767 RPL_DAO_D(dao->rpl_flags) ? ",Dagid":"",
768 dao->rpl_flags));
769
770 if(ndo->ndo_vflag > 1) {
771 const struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)bp;
772 rpl_dio_printopt(ndo, opt, length);
773 }
774 return;
775
776 trunc:
777 ND_PRINT((ndo," [|truncated]"));
778 return;
779
780 tooshort:
781 ND_PRINT((ndo," [|length too short]"));
782 return;
783 }
784
785 static void
rpl_daoack_print(netdissect_options * ndo,const u_char * bp,u_int length)786 rpl_daoack_print(netdissect_options *ndo,
787 const u_char *bp, u_int length)
788 {
789 const struct nd_rpl_daoack *daoack = (struct nd_rpl_daoack *)bp;
790 char dagid_str[65];
791
792 ND_TCHECK2(*daoack, ND_RPL_DAOACK_MIN_LEN);
793 if (length < ND_RPL_DAOACK_MIN_LEN)
794 goto tooshort;
795
796 strcpy(dagid_str,"<elided>");
797 bp += ND_RPL_DAOACK_MIN_LEN;
798 length -= ND_RPL_DAOACK_MIN_LEN;
799 if(RPL_DAOACK_D(daoack->rpl_flags)) {
800 ND_TCHECK2(daoack->rpl_dagid, 16);
801 if (length < DAGID_LEN)
802 goto tooshort;
803 rpl_format_dagid(dagid_str, daoack->rpl_dagid);
804 bp += DAGID_LEN;
805 length -= DAGID_LEN;
806 }
807
808 ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,status:%u]",
809 dagid_str,
810 daoack->rpl_daoseq,
811 daoack->rpl_instanceid,
812 daoack->rpl_status));
813
814 /* no officially defined options for DAOACK, but print any we find */
815 if(ndo->ndo_vflag > 1) {
816 const struct rpl_dio_genoption *opt = (struct rpl_dio_genoption *)bp;
817 rpl_dio_printopt(ndo, opt, length);
818 }
819 return;
820
821 trunc:
822 ND_PRINT((ndo," [|dao-truncated]"));
823 return;
824
825 tooshort:
826 ND_PRINT((ndo," [|dao-length too short]"));
827 return;
828 }
829
830 static void
rpl_print(netdissect_options * ndo,const struct icmp6_hdr * hdr,const u_char * bp,u_int length)831 rpl_print(netdissect_options *ndo,
832 const struct icmp6_hdr *hdr,
833 const u_char *bp, u_int length)
834 {
835 int secured = hdr->icmp6_code & 0x80;
836 int basecode= hdr->icmp6_code & 0x7f;
837
838 if(secured) {
839 ND_PRINT((ndo, ", (SEC) [worktodo]"));
840 /* XXX
841 * the next header pointer needs to move forward to
842 * skip the secure part.
843 */
844 return;
845 } else {
846 ND_PRINT((ndo, ", (CLR)"));
847 }
848
849 switch(basecode) {
850 case ND_RPL_DAG_IS:
851 ND_PRINT((ndo, "DODAG Information Solicitation"));
852 if(ndo->ndo_vflag) {
853 }
854 break;
855 case ND_RPL_DAG_IO:
856 ND_PRINT((ndo, "DODAG Information Object"));
857 if(ndo->ndo_vflag) {
858 rpl_dio_print(ndo, bp, length);
859 }
860 break;
861 case ND_RPL_DAO:
862 ND_PRINT((ndo, "Destination Advertisement Object"));
863 if(ndo->ndo_vflag) {
864 rpl_dao_print(ndo, bp, length);
865 }
866 break;
867 case ND_RPL_DAO_ACK:
868 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
869 if(ndo->ndo_vflag) {
870 rpl_daoack_print(ndo, bp, length);
871 }
872 break;
873 default:
874 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
875 break;
876 }
877 return;
878
879 #if 0
880 trunc:
881 ND_PRINT((ndo," [|truncated]"));
882 return;
883 #endif
884
885 }
886
887
888 void
icmp6_print(netdissect_options * ndo,const u_char * bp,u_int length,const u_char * bp2,int fragmented)889 icmp6_print(netdissect_options *ndo,
890 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
891 {
892 const struct icmp6_hdr *dp;
893 const struct ip6_hdr *ip;
894 const struct ip6_hdr *oip;
895 const struct udphdr *ouh;
896 int dport;
897 const u_char *ep;
898 u_int prot;
899
900 dp = (struct icmp6_hdr *)bp;
901 ip = (struct ip6_hdr *)bp2;
902 oip = (struct ip6_hdr *)(dp + 1);
903 /* 'ep' points to the end of available data. */
904 ep = ndo->ndo_snapend;
905
906 ND_TCHECK(dp->icmp6_cksum);
907
908 if (ndo->ndo_vflag && !fragmented) {
909 uint16_t sum, udp_sum;
910
911 if (ND_TTEST2(bp[0], length)) {
912 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
913 sum = icmp6_cksum(ip, dp, length);
914 if (sum != 0)
915 ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
916 udp_sum,
917 in_cksum_shouldbe(udp_sum, sum)));
918 else
919 ND_PRINT((ndo,"[icmp6 sum ok] "));
920 }
921 }
922
923 ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)));
924
925 /* display cosmetics: print the packet length for printer that use the vflag now */
926 if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
927 dp->icmp6_type == ND_ROUTER_ADVERT ||
928 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
929 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
930 dp->icmp6_type == ND_REDIRECT ||
931 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
932 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
933 ND_PRINT((ndo,", length %u", length));
934
935 switch (dp->icmp6_type) {
936 case ICMP6_DST_UNREACH:
937 ND_TCHECK(oip->ip6_dst);
938 ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)));
939 switch (dp->icmp6_code) {
940
941 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
942 case ICMP6_DST_UNREACH_ADMIN:
943 case ICMP6_DST_UNREACH_ADDR:
944 ND_PRINT((ndo," %s",ip6addr_string(ndo, &oip->ip6_dst)));
945 break;
946 case ICMP6_DST_UNREACH_BEYONDSCOPE:
947 ND_PRINT((ndo," %s, source address %s",
948 ip6addr_string(ndo, &oip->ip6_dst),
949 ip6addr_string(ndo, &oip->ip6_src)));
950 break;
951 case ICMP6_DST_UNREACH_NOPORT:
952 if ((ouh = get_upperlayer(ndo, (u_char *)oip, &prot))
953 == NULL)
954 goto trunc;
955
956 dport = EXTRACT_16BITS(&ouh->uh_dport);
957 switch (prot) {
958 case IPPROTO_TCP:
959 ND_PRINT((ndo,", %s tcp port %s",
960 ip6addr_string(ndo, &oip->ip6_dst),
961 tcpport_string(dport)));
962 break;
963 case IPPROTO_UDP:
964 ND_PRINT((ndo,", %s udp port %s",
965 ip6addr_string(ndo, &oip->ip6_dst),
966 udpport_string(dport)));
967 break;
968 default:
969 ND_PRINT((ndo,", %s protocol %d port %d unreachable",
970 ip6addr_string(ndo, &oip->ip6_dst),
971 oip->ip6_nxt, dport));
972 break;
973 }
974 break;
975 default:
976 if (ndo->ndo_vflag <= 1) {
977 print_unknown_data(ndo, bp,"\n\t",length);
978 return;
979 }
980 break;
981 }
982 break;
983 case ICMP6_PACKET_TOO_BIG:
984 ND_TCHECK(dp->icmp6_mtu);
985 ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
986 break;
987 case ICMP6_TIME_EXCEEDED:
988 ND_TCHECK(oip->ip6_dst);
989 switch (dp->icmp6_code) {
990 case ICMP6_TIME_EXCEED_TRANSIT:
991 ND_PRINT((ndo," for %s",
992 ip6addr_string(ndo, &oip->ip6_dst)));
993 break;
994 case ICMP6_TIME_EXCEED_REASSEMBLY:
995 ND_PRINT((ndo," (reassembly)"));
996 break;
997 default:
998 ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
999 break;
1000 }
1001 break;
1002 case ICMP6_PARAM_PROB:
1003 ND_TCHECK(oip->ip6_dst);
1004 switch (dp->icmp6_code) {
1005 case ICMP6_PARAMPROB_HEADER:
1006 ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
1007 break;
1008 case ICMP6_PARAMPROB_NEXTHEADER:
1009 ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
1010 break;
1011 case ICMP6_PARAMPROB_OPTION:
1012 ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
1013 break;
1014 default:
1015 ND_PRINT((ndo,", code-#%d",
1016 dp->icmp6_code));
1017 break;
1018 }
1019 break;
1020 case ICMP6_ECHO_REQUEST:
1021 case ICMP6_ECHO_REPLY:
1022 ND_TCHECK(dp->icmp6_seq);
1023 ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)));
1024 break;
1025 case ICMP6_MEMBERSHIP_QUERY:
1026 if (length == MLD_MINLEN) {
1027 mld6_print(ndo, (const u_char *)dp);
1028 } else if (length >= MLDV2_MINLEN) {
1029 ND_PRINT((ndo," v2"));
1030 mldv2_query_print(ndo, (const u_char *)dp, length);
1031 } else {
1032 ND_PRINT((ndo," unknown-version (len %u) ", length));
1033 }
1034 break;
1035 case ICMP6_MEMBERSHIP_REPORT:
1036 mld6_print(ndo, (const u_char *)dp);
1037 break;
1038 case ICMP6_MEMBERSHIP_REDUCTION:
1039 mld6_print(ndo, (const u_char *)dp);
1040 break;
1041 case ND_ROUTER_SOLICIT:
1042 #define RTSOLLEN 8
1043 if (ndo->ndo_vflag) {
1044 icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
1045 length - RTSOLLEN);
1046 }
1047 break;
1048 case ND_ROUTER_ADVERT:
1049 #define RTADVLEN 16
1050 if (ndo->ndo_vflag) {
1051 struct nd_router_advert *p;
1052
1053 p = (struct nd_router_advert *)dp;
1054 ND_TCHECK(p->nd_ra_retransmit);
1055 ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
1056 ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
1057 (u_int)p->nd_ra_curhoplimit,
1058 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
1059 get_rtpref(p->nd_ra_flags_reserved),
1060 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
1061 EXTRACT_32BITS(&p->nd_ra_reachable),
1062 EXTRACT_32BITS(&p->nd_ra_retransmit)));
1063
1064 icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
1065 length - RTADVLEN);
1066 }
1067 break;
1068 case ND_NEIGHBOR_SOLICIT:
1069 {
1070 struct nd_neighbor_solicit *p;
1071 p = (struct nd_neighbor_solicit *)dp;
1072 ND_TCHECK(p->nd_ns_target);
1073 ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target)));
1074 if (ndo->ndo_vflag) {
1075 #define NDSOLLEN 24
1076 icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
1077 length - NDSOLLEN);
1078 }
1079 }
1080 break;
1081 case ND_NEIGHBOR_ADVERT:
1082 {
1083 struct nd_neighbor_advert *p;
1084
1085 p = (struct nd_neighbor_advert *)dp;
1086 ND_TCHECK(p->nd_na_target);
1087 ND_PRINT((ndo,", tgt is %s",
1088 ip6addr_string(ndo, &p->nd_na_target)));
1089 if (ndo->ndo_vflag) {
1090 ND_PRINT((ndo,", Flags [%s]",
1091 bittok2str(icmp6_nd_na_flag_values,
1092 "none",
1093 EXTRACT_32BITS(&p->nd_na_flags_reserved))));
1094 #define NDADVLEN 24
1095 icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
1096 length - NDADVLEN);
1097 #undef NDADVLEN
1098 }
1099 }
1100 break;
1101 case ND_REDIRECT:
1102 #define RDR(i) ((struct nd_redirect *)(i))
1103 ND_TCHECK(RDR(dp)->nd_rd_dst);
1104 ND_PRINT((ndo,", %s", getname6(ndo, (const u_char *)&RDR(dp)->nd_rd_dst)));
1105 ND_TCHECK(RDR(dp)->nd_rd_target);
1106 ND_PRINT((ndo," to %s",
1107 getname6(ndo, (const u_char*)&RDR(dp)->nd_rd_target)));
1108 #define REDIRECTLEN 40
1109 if (ndo->ndo_vflag) {
1110 icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
1111 length - REDIRECTLEN);
1112 }
1113 break;
1114 #undef REDIRECTLEN
1115 #undef RDR
1116 case ICMP6_ROUTER_RENUMBERING:
1117 icmp6_rrenum_print(ndo, bp, ep);
1118 break;
1119 case ICMP6_NI_QUERY:
1120 case ICMP6_NI_REPLY:
1121 icmp6_nodeinfo_print(ndo, length, bp, ep);
1122 break;
1123 case IND_SOLICIT:
1124 case IND_ADVERT:
1125 break;
1126 case ICMP6_V2_MEMBERSHIP_REPORT:
1127 mldv2_report_print(ndo, (const u_char *) dp, length);
1128 break;
1129 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
1130 case ICMP6_HADISCOV_REQUEST:
1131 ND_TCHECK(dp->icmp6_data16[0]);
1132 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1133 break;
1134 case ICMP6_HADISCOV_REPLY:
1135 if (ndo->ndo_vflag) {
1136 struct in6_addr *in6;
1137 u_char *cp;
1138
1139 ND_TCHECK(dp->icmp6_data16[0]);
1140 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1141 cp = (u_char *)dp + length;
1142 in6 = (struct in6_addr *)(dp + 1);
1143 for (; (u_char *)in6 < cp; in6++) {
1144 ND_TCHECK(*in6);
1145 ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6)));
1146 }
1147 }
1148 break;
1149 case ICMP6_MOBILEPREFIX_ADVERT:
1150 if (ndo->ndo_vflag) {
1151 ND_TCHECK(dp->icmp6_data16[0]);
1152 ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
1153 if (dp->icmp6_data16[1] & 0xc0)
1154 ND_PRINT((ndo," "));
1155 if (dp->icmp6_data16[1] & 0x80)
1156 ND_PRINT((ndo,"M"));
1157 if (dp->icmp6_data16[1] & 0x40)
1158 ND_PRINT((ndo,"O"));
1159 #define MPADVLEN 8
1160 icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
1161 length - MPADVLEN);
1162 }
1163 break;
1164 case ND_RPL_MESSAGE:
1165 /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
1166 rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4);
1167 break;
1168 default:
1169 ND_PRINT((ndo,", length %u", length));
1170 if (ndo->ndo_vflag <= 1)
1171 print_unknown_data(ndo, bp,"\n\t", length);
1172 return;
1173 }
1174 if (!ndo->ndo_vflag)
1175 ND_PRINT((ndo,", length %u", length));
1176 return;
1177 trunc:
1178 ND_PRINT((ndo, "[|icmp6]"));
1179 }
1180
1181 static const struct udphdr *
get_upperlayer(netdissect_options * ndo,const u_char * bp,u_int * prot)1182 get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
1183 {
1184 const u_char *ep;
1185 const struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
1186 const struct udphdr *uh;
1187 const struct ip6_hbh *hbh;
1188 const struct ip6_frag *fragh;
1189 const struct ah *ah;
1190 u_int nh;
1191 int hlen;
1192
1193 /* 'ep' points to the end of available data. */
1194 ep = ndo->ndo_snapend;
1195
1196 if (!ND_TTEST(ip6->ip6_nxt))
1197 return NULL;
1198
1199 nh = ip6->ip6_nxt;
1200 hlen = sizeof(struct ip6_hdr);
1201
1202 while (bp < ep) {
1203 bp += hlen;
1204
1205 switch(nh) {
1206 case IPPROTO_UDP:
1207 case IPPROTO_TCP:
1208 uh = (struct udphdr *)bp;
1209 if (ND_TTEST(uh->uh_dport)) {
1210 *prot = nh;
1211 return(uh);
1212 }
1213 else
1214 return(NULL);
1215 /* NOTREACHED */
1216
1217 case IPPROTO_HOPOPTS:
1218 case IPPROTO_DSTOPTS:
1219 case IPPROTO_ROUTING:
1220 hbh = (struct ip6_hbh *)bp;
1221 if (!ND_TTEST(hbh->ip6h_len))
1222 return(NULL);
1223 nh = hbh->ip6h_nxt;
1224 hlen = (hbh->ip6h_len + 1) << 3;
1225 break;
1226
1227 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
1228 fragh = (struct ip6_frag *)bp;
1229 if (!ND_TTEST(fragh->ip6f_offlg))
1230 return(NULL);
1231 /* fragments with non-zero offset are meaningless */
1232 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
1233 return(NULL);
1234 nh = fragh->ip6f_nxt;
1235 hlen = sizeof(struct ip6_frag);
1236 break;
1237
1238 case IPPROTO_AH:
1239 ah = (struct ah *)bp;
1240 if (!ND_TTEST(ah->ah_len))
1241 return(NULL);
1242 nh = ah->ah_nxt;
1243 hlen = (ah->ah_len + 2) << 2;
1244 break;
1245
1246 default: /* unknown or undecodable header */
1247 *prot = nh; /* meaningless, but set here anyway */
1248 return(NULL);
1249 }
1250 }
1251
1252 return(NULL); /* should be notreached, though */
1253 }
1254
1255 static void
icmp6_opt_print(netdissect_options * ndo,const u_char * bp,int resid)1256 icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
1257 {
1258 const struct nd_opt_hdr *op;
1259 const struct nd_opt_prefix_info *opp;
1260 const struct nd_opt_mtu *opm;
1261 const struct nd_opt_rdnss *oprd;
1262 const struct nd_opt_dnssl *opds;
1263 const struct nd_opt_advinterval *opa;
1264 const struct nd_opt_homeagent_info *oph;
1265 const struct nd_opt_route_info *opri;
1266 const u_char *cp, *ep, *domp;
1267 struct in6_addr in6, *in6p;
1268 size_t l;
1269 u_int i;
1270
1271 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
1272
1273 cp = bp;
1274 /* 'ep' points to the end of available data. */
1275 ep = ndo->ndo_snapend;
1276
1277 while (cp < ep) {
1278 op = (struct nd_opt_hdr *)cp;
1279
1280 ECHECK(op->nd_opt_len);
1281 if (resid <= 0)
1282 return;
1283 if (op->nd_opt_len == 0)
1284 goto trunc;
1285 if (cp + (op->nd_opt_len << 3) > ep)
1286 goto trunc;
1287
1288 ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ",
1289 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
1290 op->nd_opt_type,
1291 op->nd_opt_len << 3,
1292 op->nd_opt_len));
1293
1294 switch (op->nd_opt_type) {
1295 case ND_OPT_SOURCE_LINKADDR:
1296 l = (op->nd_opt_len << 3) - 2;
1297 print_lladdr(ndo, cp + 2, l);
1298 break;
1299 case ND_OPT_TARGET_LINKADDR:
1300 l = (op->nd_opt_len << 3) - 2;
1301 print_lladdr(ndo, cp + 2, l);
1302 break;
1303 case ND_OPT_PREFIX_INFORMATION:
1304 opp = (struct nd_opt_prefix_info *)op;
1305 ND_TCHECK(opp->nd_opt_pi_prefix);
1306 ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
1307 ip6addr_string(ndo, &opp->nd_opt_pi_prefix),
1308 opp->nd_opt_pi_prefix_len,
1309 (op->nd_opt_len != 4) ? "badlen" : "",
1310 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
1311 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))));
1312 ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))));
1313 break;
1314 case ND_OPT_REDIRECTED_HEADER:
1315 print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3);
1316 /* xxx */
1317 break;
1318 case ND_OPT_MTU:
1319 opm = (struct nd_opt_mtu *)op;
1320 ND_TCHECK(opm->nd_opt_mtu_mtu);
1321 ND_PRINT((ndo," %u%s",
1322 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
1323 (op->nd_opt_len != 1) ? "bad option length" : "" ));
1324 break;
1325 case ND_OPT_RDNSS:
1326 oprd = (struct nd_opt_rdnss *)op;
1327 l = (op->nd_opt_len - 1) / 2;
1328 ND_PRINT((ndo," lifetime %us,",
1329 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
1330 for (i = 0; i < l; i++) {
1331 ND_TCHECK(oprd->nd_opt_rdnss_addr[i]);
1332 ND_PRINT((ndo," addr: %s",
1333 ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i])));
1334 }
1335 break;
1336 case ND_OPT_DNSSL:
1337 opds = (struct nd_opt_dnssl *)op;
1338 ND_PRINT((ndo," lifetime %us, domain(s):",
1339 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
1340 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
1341 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
1342 {
1343 ND_PRINT((ndo, " "));
1344 if ((domp = ns_nprint (ndo, domp, bp)) == NULL)
1345 goto trunc;
1346 }
1347 break;
1348 case ND_OPT_ADVINTERVAL:
1349 opa = (struct nd_opt_advinterval *)op;
1350 ND_TCHECK(opa->nd_opt_adv_interval);
1351 ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
1352 break;
1353 case ND_OPT_HOMEAGENT_INFO:
1354 oph = (struct nd_opt_homeagent_info *)op;
1355 ND_TCHECK(oph->nd_opt_hai_lifetime);
1356 ND_PRINT((ndo," preference %u, lifetime %u",
1357 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
1358 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
1359 break;
1360 case ND_OPT_ROUTE_INFO:
1361 opri = (struct nd_opt_route_info *)op;
1362 ND_TCHECK(opri->nd_opt_rti_lifetime);
1363 memset(&in6, 0, sizeof(in6));
1364 in6p = (struct in6_addr *)(opri + 1);
1365 switch (op->nd_opt_len) {
1366 case 1:
1367 break;
1368 case 2:
1369 ND_TCHECK2(*in6p, 8);
1370 memcpy(&in6, opri + 1, 8);
1371 break;
1372 case 3:
1373 ND_TCHECK(*in6p);
1374 memcpy(&in6, opri + 1, sizeof(in6));
1375 break;
1376 default:
1377 goto trunc;
1378 }
1379 ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6),
1380 opri->nd_opt_rti_prefixlen));
1381 ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags)));
1382 ND_PRINT((ndo,", lifetime=%s",
1383 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))));
1384 break;
1385 default:
1386 if (ndo->ndo_vflag <= 1) {
1387 print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1388 return;
1389 }
1390 break;
1391 }
1392 /* do we want to see an additional hexdump ? */
1393 if (ndo->ndo_vflag> 1)
1394 print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
1395
1396 cp += op->nd_opt_len << 3;
1397 resid -= op->nd_opt_len << 3;
1398 }
1399 return;
1400
1401 trunc:
1402 ND_PRINT((ndo, "[ndp opt]"));
1403 return;
1404 #undef ECHECK
1405 }
1406
1407 static void
mld6_print(netdissect_options * ndo,const u_char * bp)1408 mld6_print(netdissect_options *ndo, const u_char *bp)
1409 {
1410 const struct mld6_hdr *mp = (struct mld6_hdr *)bp;
1411 const u_char *ep;
1412
1413 /* 'ep' points to the end of available data. */
1414 ep = ndo->ndo_snapend;
1415
1416 if ((u_char *)mp + sizeof(*mp) > ep)
1417 return;
1418
1419 ND_PRINT((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
1420 ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &mp->mld6_addr)));
1421 }
1422
1423 static void
mldv2_report_print(netdissect_options * ndo,const u_char * bp,u_int len)1424 mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
1425 {
1426 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
1427 u_int group, nsrcs, ngroups;
1428 u_int i, j;
1429
1430 /* Minimum len is 8 */
1431 if (len < 8) {
1432 ND_PRINT((ndo," [invalid len %d]", len));
1433 return;
1434 }
1435
1436 ND_TCHECK(icp->icmp6_data16[1]);
1437 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
1438 ND_PRINT((ndo,", %d group record(s)", ngroups));
1439 if (ndo->ndo_vflag > 0) {
1440 /* Print the group records */
1441 group = 8;
1442 for (i = 0; i < ngroups; i++) {
1443 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
1444 if (len < group + 20) {
1445 ND_PRINT((ndo," [invalid number of groups]"));
1446 return;
1447 }
1448 ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr));
1449 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4])));
1450 ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]",
1451 bp[group])));
1452 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
1453 /* Check the number of sources and print them */
1454 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
1455 ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
1456 return;
1457 }
1458 if (ndo->ndo_vflag == 1)
1459 ND_PRINT((ndo,", %d source(s)", nsrcs));
1460 else {
1461 /* Print the sources */
1462 ND_PRINT((ndo," {"));
1463 for (j = 0; j < nsrcs; j++) {
1464 ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
1465 sizeof(struct in6_addr));
1466 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)])));
1467 }
1468 ND_PRINT((ndo," }"));
1469 }
1470 /* Next group record */
1471 group += 20 + nsrcs * sizeof(struct in6_addr);
1472 ND_PRINT((ndo,"]"));
1473 }
1474 }
1475 return;
1476 trunc:
1477 ND_PRINT((ndo,"[|icmp6]"));
1478 return;
1479 }
1480
1481 static void
mldv2_query_print(netdissect_options * ndo,const u_char * bp,u_int len)1482 mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
1483 {
1484 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
1485 u_int mrc;
1486 int mrt, qqi;
1487 u_int nsrcs;
1488 register u_int i;
1489
1490 /* Minimum len is 28 */
1491 if (len < 28) {
1492 ND_PRINT((ndo," [invalid len %d]", len));
1493 return;
1494 }
1495 ND_TCHECK(icp->icmp6_data16[0]);
1496 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
1497 if (mrc < 32768) {
1498 mrt = mrc;
1499 } else {
1500 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
1501 }
1502 if (ndo->ndo_vflag) {
1503 ND_PRINT((ndo," [max resp delay=%d]", mrt));
1504 }
1505 ND_TCHECK2(bp[8], sizeof(struct in6_addr));
1506 ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8])));
1507
1508 if (ndo->ndo_vflag) {
1509 ND_TCHECK(bp[25]);
1510 if (bp[24] & 0x08) {
1511 ND_PRINT((ndo," sflag"));
1512 }
1513 if (bp[24] & 0x07) {
1514 ND_PRINT((ndo," robustness=%d", bp[24] & 0x07));
1515 }
1516 if (bp[25] < 128) {
1517 qqi = bp[25];
1518 } else {
1519 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
1520 }
1521 ND_PRINT((ndo," qqi=%d", qqi));
1522 }
1523
1524 ND_TCHECK2(bp[26], 2);
1525 nsrcs = EXTRACT_16BITS(&bp[26]);
1526 if (nsrcs > 0) {
1527 if (len < 28 + nsrcs * sizeof(struct in6_addr))
1528 ND_PRINT((ndo," [invalid number of sources]"));
1529 else if (ndo->ndo_vflag > 1) {
1530 ND_PRINT((ndo," {"));
1531 for (i = 0; i < nsrcs; i++) {
1532 ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
1533 sizeof(struct in6_addr));
1534 ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)])));
1535 }
1536 ND_PRINT((ndo," }"));
1537 } else
1538 ND_PRINT((ndo,", %d source(s)", nsrcs));
1539 }
1540 ND_PRINT((ndo,"]"));
1541 return;
1542 trunc:
1543 ND_PRINT((ndo,"[|icmp6]"));
1544 return;
1545 }
1546
1547 static void
dnsname_print(netdissect_options * ndo,const u_char * cp,const u_char * ep)1548 dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
1549 {
1550 int i;
1551
1552 /* DNS name decoding - no decompression */
1553 ND_PRINT((ndo,", \""));
1554 while (cp < ep) {
1555 i = *cp++;
1556 if (i) {
1557 if (i > ep - cp) {
1558 ND_PRINT((ndo,"???"));
1559 break;
1560 }
1561 while (i-- && cp < ep) {
1562 safeputchar(ndo, *cp);
1563 cp++;
1564 }
1565 if (cp + 1 < ep && *cp)
1566 ND_PRINT((ndo,"."));
1567 } else {
1568 if (cp == ep) {
1569 /* FQDN */
1570 ND_PRINT((ndo,"."));
1571 } else if (cp + 1 == ep && *cp == '\0') {
1572 /* truncated */
1573 } else {
1574 /* invalid */
1575 ND_PRINT((ndo,"???"));
1576 }
1577 break;
1578 }
1579 }
1580 ND_PRINT((ndo,"\""));
1581 }
1582
1583 static void
icmp6_nodeinfo_print(netdissect_options * ndo,u_int icmp6len,const u_char * bp,const u_char * ep)1584 icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
1585 {
1586 const struct icmp6_nodeinfo *ni6;
1587 const struct icmp6_hdr *dp;
1588 const u_char *cp;
1589 size_t siz, i;
1590 int needcomma;
1591
1592 if (ep < bp)
1593 return;
1594 dp = (struct icmp6_hdr *)bp;
1595 ni6 = (struct icmp6_nodeinfo *)bp;
1596 siz = ep - bp;
1597
1598 switch (ni6->ni_type) {
1599 case ICMP6_NI_QUERY:
1600 if (siz == sizeof(*dp) + 4) {
1601 /* KAME who-are-you */
1602 ND_PRINT((ndo," who-are-you request"));
1603 break;
1604 }
1605 ND_PRINT((ndo," node information query"));
1606
1607 ND_TCHECK2(*dp, sizeof(*ni6));
1608 ni6 = (struct icmp6_nodeinfo *)dp;
1609 ND_PRINT((ndo," (")); /*)*/
1610 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1611 case NI_QTYPE_NOOP:
1612 ND_PRINT((ndo,"noop"));
1613 break;
1614 case NI_QTYPE_SUPTYPES:
1615 ND_PRINT((ndo,"supported qtypes"));
1616 i = EXTRACT_16BITS(&ni6->ni_flags);
1617 if (i)
1618 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1619 break;
1620 case NI_QTYPE_FQDN:
1621 ND_PRINT((ndo,"DNS name"));
1622 break;
1623 case NI_QTYPE_NODEADDR:
1624 ND_PRINT((ndo,"node addresses"));
1625 i = ni6->ni_flags;
1626 if (!i)
1627 break;
1628 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1629 ND_PRINT((ndo," [%s%s%s%s%s%s]",
1630 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1631 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1632 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1633 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1634 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1635 (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""));
1636 break;
1637 default:
1638 ND_PRINT((ndo,"unknown"));
1639 break;
1640 }
1641
1642 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1643 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1644 if (siz != sizeof(*ni6))
1645 if (ndo->ndo_vflag)
1646 ND_PRINT((ndo,", invalid len"));
1647 /*(*/
1648 ND_PRINT((ndo,")"));
1649 break;
1650 }
1651
1652
1653 /* XXX backward compat, icmp-name-lookup-03 */
1654 if (siz == sizeof(*ni6)) {
1655 ND_PRINT((ndo,", 03 draft"));
1656 /*(*/
1657 ND_PRINT((ndo,")"));
1658 break;
1659 }
1660
1661 switch (ni6->ni_code) {
1662 case ICMP6_NI_SUBJ_IPV6:
1663 if (!ND_TTEST2(*dp,
1664 sizeof(*ni6) + sizeof(struct in6_addr)))
1665 break;
1666 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1667 if (ndo->ndo_vflag)
1668 ND_PRINT((ndo,", invalid subject len"));
1669 break;
1670 }
1671 ND_PRINT((ndo,", subject=%s",
1672 getname6(ndo, (const u_char *)(ni6 + 1))));
1673 break;
1674 case ICMP6_NI_SUBJ_FQDN:
1675 ND_PRINT((ndo,", subject=DNS name"));
1676 cp = (const u_char *)(ni6 + 1);
1677 if (cp[0] == ep - cp - 1) {
1678 /* icmp-name-lookup-03, pascal string */
1679 if (ndo->ndo_vflag)
1680 ND_PRINT((ndo,", 03 draft"));
1681 cp++;
1682 ND_PRINT((ndo,", \""));
1683 while (cp < ep) {
1684 safeputchar(ndo, *cp);
1685 cp++;
1686 }
1687 ND_PRINT((ndo,"\""));
1688 } else
1689 dnsname_print(ndo, cp, ep);
1690 break;
1691 case ICMP6_NI_SUBJ_IPV4:
1692 if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1693 break;
1694 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1695 if (ndo->ndo_vflag)
1696 ND_PRINT((ndo,", invalid subject len"));
1697 break;
1698 }
1699 ND_PRINT((ndo,", subject=%s",
1700 getname(ndo, (const u_char *)(ni6 + 1))));
1701 break;
1702 default:
1703 ND_PRINT((ndo,", unknown subject"));
1704 break;
1705 }
1706
1707 /*(*/
1708 ND_PRINT((ndo,")"));
1709 break;
1710
1711 case ICMP6_NI_REPLY:
1712 if (icmp6len > siz) {
1713 ND_PRINT((ndo,"[|icmp6: node information reply]"));
1714 break;
1715 }
1716
1717 needcomma = 0;
1718
1719 ni6 = (struct icmp6_nodeinfo *)dp;
1720 ND_PRINT((ndo," node information reply"));
1721 ND_PRINT((ndo," (")); /*)*/
1722 switch (ni6->ni_code) {
1723 case ICMP6_NI_SUCCESS:
1724 if (ndo->ndo_vflag) {
1725 ND_PRINT((ndo,"success"));
1726 needcomma++;
1727 }
1728 break;
1729 case ICMP6_NI_REFUSED:
1730 ND_PRINT((ndo,"refused"));
1731 needcomma++;
1732 if (siz != sizeof(*ni6))
1733 if (ndo->ndo_vflag)
1734 ND_PRINT((ndo,", invalid length"));
1735 break;
1736 case ICMP6_NI_UNKNOWN:
1737 ND_PRINT((ndo,"unknown"));
1738 needcomma++;
1739 if (siz != sizeof(*ni6))
1740 if (ndo->ndo_vflag)
1741 ND_PRINT((ndo,", invalid length"));
1742 break;
1743 }
1744
1745 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1746 /*(*/
1747 ND_PRINT((ndo,")"));
1748 break;
1749 }
1750
1751 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1752 case NI_QTYPE_NOOP:
1753 if (needcomma)
1754 ND_PRINT((ndo,", "));
1755 ND_PRINT((ndo,"noop"));
1756 if (siz != sizeof(*ni6))
1757 if (ndo->ndo_vflag)
1758 ND_PRINT((ndo,", invalid length"));
1759 break;
1760 case NI_QTYPE_SUPTYPES:
1761 if (needcomma)
1762 ND_PRINT((ndo,", "));
1763 ND_PRINT((ndo,"supported qtypes"));
1764 i = EXTRACT_16BITS(&ni6->ni_flags);
1765 if (i)
1766 ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
1767 break;
1768 case NI_QTYPE_FQDN:
1769 if (needcomma)
1770 ND_PRINT((ndo,", "));
1771 ND_PRINT((ndo,"DNS name"));
1772 cp = (const u_char *)(ni6 + 1) + 4;
1773 if (cp[0] == ep - cp - 1) {
1774 /* icmp-name-lookup-03, pascal string */
1775 if (ndo->ndo_vflag)
1776 ND_PRINT((ndo,", 03 draft"));
1777 cp++;
1778 ND_PRINT((ndo,", \""));
1779 while (cp < ep) {
1780 safeputchar(ndo, *cp);
1781 cp++;
1782 }
1783 ND_PRINT((ndo,"\""));
1784 } else
1785 dnsname_print(ndo, cp, ep);
1786 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1787 ND_PRINT((ndo," [TTL=%u]", *(uint32_t *)(ni6 + 1)));
1788 break;
1789 case NI_QTYPE_NODEADDR:
1790 if (needcomma)
1791 ND_PRINT((ndo,", "));
1792 ND_PRINT((ndo,"node addresses"));
1793 i = sizeof(*ni6);
1794 while (i < siz) {
1795 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1796 break;
1797 ND_PRINT((ndo," %s", getname6(ndo, bp + i)));
1798 i += sizeof(struct in6_addr);
1799 ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
1800 i += sizeof(int32_t);
1801 }
1802 i = ni6->ni_flags;
1803 if (!i)
1804 break;
1805 ND_PRINT((ndo," [%s%s%s%s%s%s%s]",
1806 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1807 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1808 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1809 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1810 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1811 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1812 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""));
1813 break;
1814 default:
1815 if (needcomma)
1816 ND_PRINT((ndo,", "));
1817 ND_PRINT((ndo,"unknown"));
1818 break;
1819 }
1820
1821 /*(*/
1822 ND_PRINT((ndo,")"));
1823 break;
1824 }
1825 return;
1826
1827 trunc:
1828 ND_PRINT((ndo, "[|icmp6]"));
1829 }
1830
1831 static void
icmp6_rrenum_print(netdissect_options * ndo,const u_char * bp,const u_char * ep)1832 icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
1833 {
1834 const struct icmp6_router_renum *rr6;
1835 const char *cp;
1836 struct rr_pco_match *match;
1837 struct rr_pco_use *use;
1838 char hbuf[NI_MAXHOST];
1839 int n;
1840
1841 if (ep < bp)
1842 return;
1843 rr6 = (struct icmp6_router_renum *)bp;
1844 cp = (const char *)(rr6 + 1);
1845
1846 ND_TCHECK(rr6->rr_reserved);
1847 switch (rr6->rr_code) {
1848 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1849 ND_PRINT((ndo,"router renum: command"));
1850 break;
1851 case ICMP6_ROUTER_RENUMBERING_RESULT:
1852 ND_PRINT((ndo,"router renum: result"));
1853 break;
1854 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1855 ND_PRINT((ndo,"router renum: sequence number reset"));
1856 break;
1857 default:
1858 ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
1859 break;
1860 }
1861
1862 ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
1863
1864 if (ndo->ndo_vflag) {
1865 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1866 ND_PRINT((ndo,"[")); /*]*/
1867 if (rr6->rr_flags) {
1868 ND_PRINT((ndo,"%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1869 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1870 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1871 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1872 F(ICMP6_RR_FLAGS_PREVDONE, "P")));
1873 }
1874 ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum));
1875 ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
1876 if (rr6->rr_reserved)
1877 ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
1878 /*[*/
1879 ND_PRINT((ndo,"]"));
1880 #undef F
1881 }
1882
1883 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1884 match = (struct rr_pco_match *)cp;
1885 cp = (const char *)(match + 1);
1886
1887 ND_TCHECK(match->rpm_prefix);
1888
1889 if (ndo->ndo_vflag > 1)
1890 ND_PRINT((ndo,"\n\t"));
1891 else
1892 ND_PRINT((ndo," "));
1893 ND_PRINT((ndo,"match(")); /*)*/
1894 switch (match->rpm_code) {
1895 case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break;
1896 case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break;
1897 case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break;
1898 default: ND_PRINT((ndo,"#%u", match->rpm_code)); break;
1899 }
1900
1901 if (ndo->ndo_vflag) {
1902 ND_PRINT((ndo,",ord=%u", match->rpm_ordinal));
1903 ND_PRINT((ndo,",min=%u", match->rpm_minlen));
1904 ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
1905 }
1906 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1907 ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
1908 else
1909 ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
1910 /*(*/
1911 ND_PRINT((ndo,")"));
1912
1913 n = match->rpm_len - 3;
1914 if (n % 4)
1915 goto trunc;
1916 n /= 4;
1917 while (n-- > 0) {
1918 use = (struct rr_pco_use *)cp;
1919 cp = (const char *)(use + 1);
1920
1921 ND_TCHECK(use->rpu_prefix);
1922
1923 if (ndo->ndo_vflag > 1)
1924 ND_PRINT((ndo,"\n\t"));
1925 else
1926 ND_PRINT((ndo," "));
1927 ND_PRINT((ndo,"use(")); /*)*/
1928 if (use->rpu_flags) {
1929 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1930 ND_PRINT((ndo,"%s%s,",
1931 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1932 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")));
1933 #undef F
1934 }
1935 if (ndo->ndo_vflag) {
1936 ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask));
1937 ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags));
1938 if (~use->rpu_vltime == 0)
1939 ND_PRINT((ndo,"vltime=infty,"));
1940 else
1941 ND_PRINT((ndo,"vltime=%u,",
1942 EXTRACT_32BITS(&use->rpu_vltime)));
1943 if (~use->rpu_pltime == 0)
1944 ND_PRINT((ndo,"pltime=infty,"));
1945 else
1946 ND_PRINT((ndo,"pltime=%u,",
1947 EXTRACT_32BITS(&use->rpu_pltime)));
1948 }
1949 if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1950 sizeof(hbuf)))
1951 ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
1952 use->rpu_keeplen));
1953 else
1954 ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
1955 use->rpu_keeplen));
1956 /*(*/
1957 ND_PRINT((ndo,")"));
1958 }
1959 }
1960
1961 return;
1962
1963 trunc:
1964 ND_PRINT((ndo,"[|icmp6]"));
1965 }
1966
1967 #endif /* INET6 */
1968
1969 /*
1970 * Local Variables:
1971 * c-style: whitesmith
1972 * c-basic-offset: 8
1973 * End:
1974 */
1975