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1 /*	$NetBSD: icmp6.h,v 1.40 2009/10/31 22:32:17 christos Exp $	*/
2 /*	$KAME: icmp6.h,v 1.84 2003/04/23 10:26:51 itojun Exp $	*/
3 
4 
5 /*
6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. Neither the name of the project nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 /*
35  * Copyright (c) 1982, 1986, 1993
36  *	The Regents of the University of California.  All rights reserved.
37  *
38  * Redistribution and use in source and binary forms, with or without
39  * modification, are permitted provided that the following conditions
40  * are met:
41  * 1. Redistributions of source code must retain the above copyright
42  *    notice, this list of conditions and the following disclaimer.
43  * 2. Redistributions in binary form must reproduce the above copyright
44  *    notice, this list of conditions and the following disclaimer in the
45  *    documentation and/or other materials provided with the distribution.
46  * 3. Neither the name of the University nor the names of its contributors
47  *    may be used to endorse or promote products derived from this software
48  *    without specific prior written permission.
49  *
50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60  * SUCH DAMAGE.
61  *
62  *	@(#)ip_icmp.h	8.1 (Berkeley) 6/10/93
63  */
64 
65 #ifndef _NETINET_ICMP6_H_
66 #define _NETINET_ICMP6_H_
67 
68 #define ICMPV6_PLD_MAXLEN	1232	/* IPV6_MMTU - sizeof(struct ip6_hdr)
69 					   - sizeof(struct icmp6_hdr) */
70 
71 struct icmp6_hdr {
72 	u_int8_t	icmp6_type;	/* type field */
73 	u_int8_t	icmp6_code;	/* code field */
74 	u_int16_t	icmp6_cksum;	/* checksum field */
75 	union {
76 		u_int32_t	icmp6_un_data32[1]; /* type-specific field */
77 		u_int16_t	icmp6_un_data16[2]; /* type-specific field */
78 		u_int8_t	icmp6_un_data8[4];  /* type-specific field */
79 	} icmp6_dataun;
80 } __packed;
81 
82 #define icmp6_data32	icmp6_dataun.icmp6_un_data32
83 #define icmp6_data16	icmp6_dataun.icmp6_un_data16
84 #define icmp6_data8	icmp6_dataun.icmp6_un_data8
85 #define icmp6_pptr	icmp6_data32[0]		/* parameter prob */
86 #define icmp6_mtu	icmp6_data32[0]		/* packet too big */
87 #define icmp6_id	icmp6_data16[0]		/* echo request/reply */
88 #define icmp6_seq	icmp6_data16[1]		/* echo request/reply */
89 #define icmp6_maxdelay	icmp6_data16[0]		/* mcast group membership */
90 
91 #define ICMP6_DST_UNREACH		1	/* dest unreachable, codes: */
92 #define ICMP6_PACKET_TOO_BIG		2	/* packet too big */
93 #define ICMP6_TIME_EXCEEDED		3	/* time exceeded, code: */
94 #define ICMP6_PARAM_PROB		4	/* ip6 header bad */
95 
96 #define ICMP6_ECHO_REQUEST		128	/* echo service */
97 #define ICMP6_ECHO_REPLY		129	/* echo reply */
98 #define MLD_LISTENER_QUERY		130 	/* multicast listener query */
99 #define MLD_LISTENER_REPORT		131	/* multicast listener report */
100 #define MLD_LISTENER_DONE		132	/* multicast listener done */
101 
102 /* RFC2292 decls */
103 #define ICMP6_MEMBERSHIP_QUERY		130	/* group membership query */
104 #define ICMP6_MEMBERSHIP_REPORT		131	/* group membership report */
105 #define ICMP6_MEMBERSHIP_REDUCTION	132	/* group membership termination */
106 
107 #ifndef _KERNEL
108 /* the followings are for backward compatibility to old KAME apps. */
109 #define MLD6_LISTENER_QUERY	MLD_LISTENER_QUERY
110 #define MLD6_LISTENER_REPORT	MLD_LISTENER_REPORT
111 #define MLD6_LISTENER_DONE	MLD_LISTENER_DONE
112 #endif
113 
114 #define ND_ROUTER_SOLICIT		133	/* router solicitation */
115 #define ND_ROUTER_ADVERT		134	/* router advertisement */
116 #define ND_NEIGHBOR_SOLICIT		135	/* neighbor solicitation */
117 #define ND_NEIGHBOR_ADVERT		136	/* neighbor advertisement */
118 #define ND_REDIRECT			137	/* redirect */
119 
120 #define ICMP6_ROUTER_RENUMBERING	138	/* router renumbering */
121 
122 #define ICMP6_WRUREQUEST		139	/* who are you request */
123 #define ICMP6_WRUREPLY			140	/* who are you reply */
124 #define ICMP6_FQDN_QUERY		139	/* FQDN query */
125 #define ICMP6_FQDN_REPLY		140	/* FQDN reply */
126 #define ICMP6_NI_QUERY			139	/* node information request */
127 #define ICMP6_NI_REPLY			140	/* node information reply */
128 
129 /* The definitions below are experimental. TBA */
130 #define MLD_MTRACE_RESP			200	/* mtrace response(to sender) */
131 #define MLD_MTRACE			201	/* mtrace messages */
132 
133 #ifndef _KERNEL
134 /* the followings are for backward compatibility to old KAME apps. */
135 #define MLD6_MTRACE_RESP	MLD_MTRACE_RESP
136 #define MLD6_MTRACE		MLD_MTRACE
137 #endif
138 
139 #define ICMP6_MAXTYPE			201
140 
141 #define ICMP6_DST_UNREACH_NOROUTE	0	/* no route to destination */
142 #define ICMP6_DST_UNREACH_ADMIN	 	1	/* administratively prohibited */
143 #define ICMP6_DST_UNREACH_NOTNEIGHBOR	2	/* not a neighbor(obsolete) */
144 #define ICMP6_DST_UNREACH_BEYONDSCOPE	2	/* beyond scope of source address */
145 #define ICMP6_DST_UNREACH_ADDR		3	/* address unreachable */
146 #define ICMP6_DST_UNREACH_NOPORT	4	/* port unreachable */
147 
148 #define ICMP6_TIME_EXCEED_TRANSIT 	0	/* ttl==0 in transit */
149 #define ICMP6_TIME_EXCEED_REASSEMBLY	1	/* ttl==0 in reass */
150 
151 #define ICMP6_PARAMPROB_HEADER 	 	0	/* erroneous header field */
152 #define ICMP6_PARAMPROB_NEXTHEADER	1	/* unrecognized next header */
153 #define ICMP6_PARAMPROB_OPTION		2	/* unrecognized option */
154 
155 #define ICMP6_INFOMSG_MASK		0x80	/* all informational messages */
156 
157 #define ICMP6_NI_SUBJ_IPV6	0	/* Query Subject is an IPv6 address */
158 #define ICMP6_NI_SUBJ_FQDN	1	/* Query Subject is a Domain name */
159 #define ICMP6_NI_SUBJ_IPV4	2	/* Query Subject is an IPv4 address */
160 
161 #define ICMP6_NI_SUCCESS	0	/* node information successful reply */
162 #define ICMP6_NI_REFUSED	1	/* node information request is refused */
163 #define ICMP6_NI_UNKNOWN	2	/* unknown Qtype */
164 
165 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0	/* rr command */
166 #define ICMP6_ROUTER_RENUMBERING_RESULT   1	/* rr result */
167 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255	/* rr seq num reset */
168 
169 /* Used in kernel only */
170 #define ND_REDIRECT_ONLINK	0	/* redirect to an on-link node */
171 #define ND_REDIRECT_ROUTER	1	/* redirect to a better router */
172 
173 /*
174  * Multicast Listener Discovery
175  */
176 struct mld_hdr {
177 	struct icmp6_hdr	mld_icmp6_hdr;
178 	struct in6_addr		mld_addr; /* multicast address */
179 } __packed;
180 
181 /* definitions to provide backward compatibility to old KAME applications */
182 #ifndef _KERNEL
183 #define mld6_hdr	mld_hdr
184 #define mld6_type	mld_type
185 #define mld6_code	mld_code
186 #define mld6_cksum	mld_cksum
187 #define mld6_maxdelay	mld_maxdelay
188 #define mld6_reserved	mld_reserved
189 #define mld6_addr	mld_addr
190 #endif
191 
192 /* shortcut macro definitions */
193 #define mld_type	mld_icmp6_hdr.icmp6_type
194 #define mld_code	mld_icmp6_hdr.icmp6_code
195 #define mld_cksum	mld_icmp6_hdr.icmp6_cksum
196 #define mld_maxdelay	mld_icmp6_hdr.icmp6_data16[0]
197 #define mld_reserved	mld_icmp6_hdr.icmp6_data16[1]
198 
199 #define MLD_MINLEN			24
200 
201 /*
202  * Neighbor Discovery
203  */
204 
205 struct nd_router_solicit {	/* router solicitation */
206 	struct icmp6_hdr 	nd_rs_hdr;
207 	/* could be followed by options */
208 } __packed;
209 
210 #define nd_rs_type	nd_rs_hdr.icmp6_type
211 #define nd_rs_code	nd_rs_hdr.icmp6_code
212 #define nd_rs_cksum	nd_rs_hdr.icmp6_cksum
213 #define nd_rs_reserved	nd_rs_hdr.icmp6_data32[0]
214 
215 struct nd_router_advert {	/* router advertisement */
216 	struct icmp6_hdr	nd_ra_hdr;
217 	u_int32_t		nd_ra_reachable;	/* reachable time */
218 	u_int32_t		nd_ra_retransmit;	/* retransmit timer */
219 	/* could be followed by options */
220 } __packed;
221 
222 #define nd_ra_type		nd_ra_hdr.icmp6_type
223 #define nd_ra_code		nd_ra_hdr.icmp6_code
224 #define nd_ra_cksum		nd_ra_hdr.icmp6_cksum
225 #define nd_ra_curhoplimit	nd_ra_hdr.icmp6_data8[0]
226 #define nd_ra_flags_reserved	nd_ra_hdr.icmp6_data8[1]
227 #define ND_RA_FLAG_MANAGED	0x80
228 #define ND_RA_FLAG_OTHER	0x40
229 #define ND_RA_FLAG_HOME_AGENT	0x20
230 
231 /*
232  * Router preference values based on RFC4199.
233  */
234 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
235 
236 #define ND_RA_FLAG_RTPREF_HIGH	0x08 /* 00001000 */
237 #define ND_RA_FLAG_RTPREF_MEDIUM	0x00 /* 00000000 */
238 #define ND_RA_FLAG_RTPREF_LOW	0x18 /* 00011000 */
239 #define ND_RA_FLAG_RTPREF_RSV	0x10 /* 00010000 */
240 
241 #define nd_ra_router_lifetime	nd_ra_hdr.icmp6_data16[1]
242 
243 struct nd_neighbor_solicit {	/* neighbor solicitation */
244 	struct icmp6_hdr	nd_ns_hdr;
245 	struct in6_addr		nd_ns_target;	/*target address */
246 	/* could be followed by options */
247 } __packed;
248 
249 #define nd_ns_type		nd_ns_hdr.icmp6_type
250 #define nd_ns_code		nd_ns_hdr.icmp6_code
251 #define nd_ns_cksum		nd_ns_hdr.icmp6_cksum
252 #define nd_ns_reserved		nd_ns_hdr.icmp6_data32[0]
253 
254 struct nd_neighbor_advert {	/* neighbor advertisement */
255 	struct icmp6_hdr	nd_na_hdr;
256 	struct in6_addr		nd_na_target;	/* target address */
257 	/* could be followed by options */
258 } __packed;
259 
260 #define nd_na_type		nd_na_hdr.icmp6_type
261 #define nd_na_code		nd_na_hdr.icmp6_code
262 #define nd_na_cksum		nd_na_hdr.icmp6_cksum
263 #define nd_na_flags_reserved	nd_na_hdr.icmp6_data32[0]
264 #if BYTE_ORDER == BIG_ENDIAN
265 #define ND_NA_FLAG_ROUTER		0x80000000
266 #define ND_NA_FLAG_SOLICITED		0x40000000
267 #define ND_NA_FLAG_OVERRIDE		0x20000000
268 #else
269 #if BYTE_ORDER == LITTLE_ENDIAN
270 #define ND_NA_FLAG_ROUTER		0x80
271 #define ND_NA_FLAG_SOLICITED		0x40
272 #define ND_NA_FLAG_OVERRIDE		0x20
273 #endif
274 #endif
275 
276 struct nd_redirect {		/* redirect */
277 	struct icmp6_hdr	nd_rd_hdr;
278 	struct in6_addr		nd_rd_target;	/* target address */
279 	struct in6_addr		nd_rd_dst;	/* destination address */
280 	/* could be followed by options */
281 } __packed;
282 
283 #define nd_rd_type		nd_rd_hdr.icmp6_type
284 #define nd_rd_code		nd_rd_hdr.icmp6_code
285 #define nd_rd_cksum		nd_rd_hdr.icmp6_cksum
286 #define nd_rd_reserved		nd_rd_hdr.icmp6_data32[0]
287 
288 struct nd_opt_hdr {		/* Neighbor discovery option header */
289 	u_int8_t	nd_opt_type;
290 	u_int8_t	nd_opt_len;
291 	/* followed by option specific data*/
292 } __packed;
293 
294 #define ND_OPT_SOURCE_LINKADDR		1
295 #define ND_OPT_TARGET_LINKADDR		2
296 #define ND_OPT_PREFIX_INFORMATION	3
297 #define ND_OPT_REDIRECTED_HEADER	4
298 #define ND_OPT_MTU			5
299 #define ND_OPT_ADVINTERVAL		7
300 #define ND_OPT_HOMEAGENT_INFO		8
301 #define ND_OPT_SOURCE_ADDRLIST		9
302 #define ND_OPT_TARGET_ADDRLIST		10
303 #define ND_OPT_RDNSS			25
304 /* draft-ietf-ipngwg-router-preference, not officially assigned yet */
305 #define ND_OPT_ROUTE_INFO		200
306 /* draft-ietf-mobileip-hmipv6, not officially assigned yet */
307 #define ND_OPT_MAP			201
308 
309 struct nd_opt_route_info {	/* route info */
310 	u_int8_t	nd_opt_rti_type;
311 	u_int8_t	nd_opt_rti_len;
312 	u_int8_t	nd_opt_rti_prefixlen;
313 	u_int8_t	nd_opt_rti_flags;
314 	u_int32_t	nd_opt_rti_lifetime;
315 	/* prefix follows */
316 };
317 
318 struct nd_opt_prefix_info {	/* prefix information */
319 	u_int8_t	nd_opt_pi_type;
320 	u_int8_t	nd_opt_pi_len;
321 	u_int8_t	nd_opt_pi_prefix_len;
322 	u_int8_t	nd_opt_pi_flags_reserved;
323 	u_int32_t	nd_opt_pi_valid_time;
324 	u_int32_t	nd_opt_pi_preferred_time;
325 	u_int32_t	nd_opt_pi_reserved2;
326 	struct in6_addr	nd_opt_pi_prefix;
327 } __packed;
328 
329 #define ND_OPT_PI_FLAG_ONLINK		0x80
330 #define ND_OPT_PI_FLAG_AUTO		0x40
331 
332 struct nd_opt_rd_hdr {		/* redirected header */
333 	u_int8_t	nd_opt_rh_type;
334 	u_int8_t	nd_opt_rh_len;
335 	u_int16_t	nd_opt_rh_reserved1;
336 	u_int32_t	nd_opt_rh_reserved2;
337 	/* followed by IP header and data */
338 } __packed;
339 
340 struct nd_opt_mtu {		/* MTU option */
341 	u_int8_t	nd_opt_mtu_type;
342 	u_int8_t	nd_opt_mtu_len;
343 	u_int16_t	nd_opt_mtu_reserved;
344 	u_int32_t	nd_opt_mtu_mtu;
345 } __packed;
346 
347 struct nd_opt_rdnss {		/* RDNSS option RFC 5006 */
348 	u_int8_t	nd_opt_rdnss_type;
349 	u_int8_t	nd_opt_rdnss_len;
350 	u_int16_t	nd_opt_rdnss_reserved;
351 	u_int32_t	nd_opt_rdnss_lifetime;
352 	/* followed by list of IP prefixes */
353 } __packed;
354 
355 /*
356  * icmp6 namelookup
357  */
358 
359 struct icmp6_namelookup {
360 	struct icmp6_hdr 	icmp6_nl_hdr;
361 	u_int8_t	icmp6_nl_nonce[8];
362 	int32_t		icmp6_nl_ttl;
363 #if 0
364 	u_int8_t	icmp6_nl_len;
365 	u_int8_t	icmp6_nl_name[3];
366 #endif
367 	/* could be followed by options */
368 } __packed;
369 
370 /*
371  * icmp6 node information
372  */
373 struct icmp6_nodeinfo {
374 	struct icmp6_hdr icmp6_ni_hdr;
375 	u_int8_t icmp6_ni_nonce[8];
376 	/* could be followed by reply data */
377 } __packed;
378 
379 #define ni_type		icmp6_ni_hdr.icmp6_type
380 #define ni_code		icmp6_ni_hdr.icmp6_code
381 #define ni_cksum	icmp6_ni_hdr.icmp6_cksum
382 #define ni_qtype	icmp6_ni_hdr.icmp6_data16[0]
383 #define ni_flags	icmp6_ni_hdr.icmp6_data16[1]
384 
385 #define NI_QTYPE_NOOP		0 /* NOOP  */
386 #define NI_QTYPE_SUPTYPES	1 /* Supported Qtypes */
387 #define NI_QTYPE_FQDN		2 /* FQDN (draft 04) */
388 #define NI_QTYPE_DNSNAME	2 /* DNS Name */
389 #define NI_QTYPE_NODEADDR	3 /* Node Addresses */
390 #define NI_QTYPE_IPV4ADDR	4 /* IPv4 Addresses */
391 
392 #if BYTE_ORDER == BIG_ENDIAN
393 #define NI_SUPTYPE_FLAG_COMPRESS	0x1
394 #define NI_FQDN_FLAG_VALIDTTL		0x1
395 #elif BYTE_ORDER == LITTLE_ENDIAN
396 #define NI_SUPTYPE_FLAG_COMPRESS	0x0100
397 #define NI_FQDN_FLAG_VALIDTTL		0x0100
398 #endif
399 
400 #ifdef NAME_LOOKUPS_04
401 #if BYTE_ORDER == BIG_ENDIAN
402 #define NI_NODEADDR_FLAG_LINKLOCAL	0x1
403 #define NI_NODEADDR_FLAG_SITELOCAL	0x2
404 #define NI_NODEADDR_FLAG_GLOBAL		0x4
405 #define NI_NODEADDR_FLAG_ALL		0x8
406 #define NI_NODEADDR_FLAG_TRUNCATE	0x10
407 #define NI_NODEADDR_FLAG_ANYCAST	0x20 /* just experimental. not in spec */
408 #elif BYTE_ORDER == LITTLE_ENDIAN
409 #define NI_NODEADDR_FLAG_LINKLOCAL	0x0100
410 #define NI_NODEADDR_FLAG_SITELOCAL	0x0200
411 #define NI_NODEADDR_FLAG_GLOBAL		0x0400
412 #define NI_NODEADDR_FLAG_ALL		0x0800
413 #define NI_NODEADDR_FLAG_TRUNCATE	0x1000
414 #define NI_NODEADDR_FLAG_ANYCAST	0x2000 /* just experimental. not in spec */
415 #endif
416 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
417 #if BYTE_ORDER == BIG_ENDIAN
418 #define NI_NODEADDR_FLAG_TRUNCATE	0x1
419 #define NI_NODEADDR_FLAG_ALL		0x2
420 #define NI_NODEADDR_FLAG_COMPAT		0x4
421 #define NI_NODEADDR_FLAG_LINKLOCAL	0x8
422 #define NI_NODEADDR_FLAG_SITELOCAL	0x10
423 #define NI_NODEADDR_FLAG_GLOBAL		0x20
424 #define NI_NODEADDR_FLAG_ANYCAST	0x40 /* just experimental. not in spec */
425 #elif BYTE_ORDER == LITTLE_ENDIAN
426 #define NI_NODEADDR_FLAG_TRUNCATE	0x0100
427 #define NI_NODEADDR_FLAG_ALL		0x0200
428 #define NI_NODEADDR_FLAG_COMPAT		0x0400
429 #define NI_NODEADDR_FLAG_LINKLOCAL	0x0800
430 #define NI_NODEADDR_FLAG_SITELOCAL	0x1000
431 #define NI_NODEADDR_FLAG_GLOBAL		0x2000
432 #define NI_NODEADDR_FLAG_ANYCAST	0x4000 /* just experimental. not in spec */
433 #endif
434 #endif
435 
436 struct ni_reply_fqdn {
437 	u_int32_t ni_fqdn_ttl;	/* TTL */
438 	u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
439 	u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
440 } __packed;
441 
442 /*
443  * Router Renumbering. as router-renum-08.txt
444  */
445 struct icmp6_router_renum {	/* router renumbering header */
446 	struct icmp6_hdr	rr_hdr;
447 	u_int8_t	rr_segnum;
448 	u_int8_t	rr_flags;
449 	u_int16_t	rr_maxdelay;
450 	u_int32_t	rr_reserved;
451 } __packed;
452 
453 #define ICMP6_RR_FLAGS_TEST		0x80
454 #define ICMP6_RR_FLAGS_REQRESULT	0x40
455 #define ICMP6_RR_FLAGS_FORCEAPPLY	0x20
456 #define ICMP6_RR_FLAGS_SPECSITE		0x10
457 #define ICMP6_RR_FLAGS_PREVDONE		0x08
458 
459 #define rr_type		rr_hdr.icmp6_type
460 #define rr_code		rr_hdr.icmp6_code
461 #define rr_cksum	rr_hdr.icmp6_cksum
462 #define rr_seqnum 	rr_hdr.icmp6_data32[0]
463 
464 struct rr_pco_match {		/* match prefix part */
465 	u_int8_t	rpm_code;
466 	u_int8_t	rpm_len;
467 	u_int8_t	rpm_ordinal;
468 	u_int8_t	rpm_matchlen;
469 	u_int8_t	rpm_minlen;
470 	u_int8_t	rpm_maxlen;
471 	u_int16_t	rpm_reserved;
472 	struct	in6_addr	rpm_prefix;
473 } __packed;
474 
475 #define RPM_PCO_ADD		1
476 #define RPM_PCO_CHANGE		2
477 #define RPM_PCO_SETGLOBAL	3
478 #define RPM_PCO_MAX		4
479 
480 struct rr_pco_use {		/* use prefix part */
481 	u_int8_t	rpu_uselen;
482 	u_int8_t	rpu_keeplen;
483 	u_int8_t	rpu_ramask;
484 	u_int8_t	rpu_raflags;
485 	u_int32_t	rpu_vltime;
486 	u_int32_t	rpu_pltime;
487 	u_int32_t	rpu_flags;
488 	struct	in6_addr rpu_prefix;
489 } __packed;
490 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK	0x80
491 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO	0x40
492 
493 #if BYTE_ORDER == BIG_ENDIAN
494 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
495 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
496 #elif BYTE_ORDER == LITTLE_ENDIAN
497 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
498 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
499 #endif
500 
501 struct rr_result {		/* router renumbering result message */
502 	u_int16_t	rrr_flags;
503 	u_int8_t	rrr_ordinal;
504 	u_int8_t	rrr_matchedlen;
505 	u_int32_t	rrr_ifid;
506 	struct	in6_addr rrr_prefix;
507 } __packed;
508 #if BYTE_ORDER == BIG_ENDIAN
509 #define ICMP6_RR_RESULT_FLAGS_OOB		0x0002
510 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x0001
511 #elif BYTE_ORDER == LITTLE_ENDIAN
512 #define ICMP6_RR_RESULT_FLAGS_OOB		0x0200
513 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x0100
514 #endif
515 
516 /*
517  * icmp6 filter structures.
518  */
519 
520 struct icmp6_filter {
521 	u_int32_t icmp6_filt[8];
522 };
523 
524 #define	ICMP6_FILTER_SETPASSALL(filterp) \
525 	(void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
526 #define	ICMP6_FILTER_SETBLOCKALL(filterp) \
527 	(void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
528 #define	ICMP6_FILTER_SETPASS(type, filterp) \
529 	(((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
530 #define	ICMP6_FILTER_SETBLOCK(type, filterp) \
531 	(((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
532 #define	ICMP6_FILTER_WILLPASS(type, filterp) \
533 	((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
534 #define	ICMP6_FILTER_WILLBLOCK(type, filterp) \
535 	((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
536 
537 /*
538  * Variables related to this implementation
539  * of the internet control message protocol version 6.
540  */
541 
542 /*
543  * IPv6 ICMP statistics.
544  * Each counter is an unsigned 64-bit value.
545  */
546 #define	ICMP6_STAT_ERROR	0	/* # of calls to icmp6_error */
547 #define	ICMP6_STAT_CANTERROR	1	/* no error (old was icmp) */
548 #define	ICMP6_STAT_TOOFREQ	2	/* no error (rate limitation) */
549 #define	ICMP6_STAT_OUTHIST	3	/* # of output messages */
550 		/* space for 256 counters */
551 #define	ICMP6_STAT_BADCODE	259	/* icmp6_code out of range */
552 #define	ICMP6_STAT_TOOSHORT	260	/* packet < sizeof(struct icmp6_hdr) */
553 #define	ICMP6_STAT_CHECKSUM	261	/* bad checksum */
554 #define	ICMP6_STAT_BADLEN	262	/* calculated bound mismatch */
555 	/*
556 	 * number of responses; this member is inherited from the netinet code,
557 	 * but for netinet6 code, it is already available in outhist[].
558 	 */
559 #define	ICMP6_STAT_REFLECT	263
560 #define	ICMP6_STAT_INHIST	264	/* # of input messages */
561 		/* space for 256 counters */
562 #define	ICMP6_STAT_ND_TOOMANYOPT 520	/* too many ND options */
563 #define	ICMP6_STAT_OUTERRHIST	521
564 		/* space for 13 counters */
565 #define	ICMP6_STAT_PMTUCHG	534	/* path MTU changes */
566 #define	ICMP6_STAT_ND_BADOPT	535	/* bad ND options */
567 #define	ICMP6_STAT_BADNS	536	/* bad neighbor solicititation */
568 #define	ICMP6_STAT_BADNA	537	/* bad neighbor advertisement */
569 #define	ICMP6_STAT_BADRS	538	/* bad router solicitiation */
570 #define	ICMP6_STAT_BADRA	539	/* bad router advertisement */
571 #define	ICMP6_STAT_BADREDIRECT	540	/* bad redirect message */
572 
573 #define	ICMP6_NSTATS		541
574 
575 #define	ICMP6_ERRSTAT_DST_UNREACH_NOROUTE	0
576 #define	ICMP6_ERRSTAT_DST_UNREACH_ADMIN		1
577 #define	ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE	2
578 #define	ICMP6_ERRSTAT_DST_UNREACH_ADDR		3
579 #define	ICMP6_ERRSTAT_DST_UNREACH_NOPORT	4
580 #define	ICMP6_ERRSTAT_PACKET_TOO_BIG		5
581 #define	ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT	6
582 #define	ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY	7
583 #define	ICMP6_ERRSTAT_PARAMPROB_HEADER		8
584 #define	ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER	9
585 #define	ICMP6_ERRSTAT_PARAMPROB_OPTION		10
586 #define	ICMP6_ERRSTAT_REDIRECT			11
587 #define	ICMP6_ERRSTAT_UNKNOWN			12
588 
589 /*
590  * Names for ICMP sysctl objects
591  */
592 #define ICMPV6CTL_STATS		1
593 #define ICMPV6CTL_REDIRACCEPT	2	/* accept/process redirects */
594 #define ICMPV6CTL_REDIRTIMEOUT	3	/* redirect cache time */
595 #if 0	/*obsoleted*/
596 #define ICMPV6CTL_ERRRATELIMIT	5	/* ICMPv6 error rate limitation */
597 #endif
598 #define ICMPV6CTL_ND6_PRUNE	6
599 #define ICMPV6CTL_ND6_DELAY	8
600 #define ICMPV6CTL_ND6_UMAXTRIES	9
601 #define ICMPV6CTL_ND6_MMAXTRIES		10
602 #define ICMPV6CTL_ND6_USELOOPBACK	11
603 /*#define ICMPV6CTL_ND6_PROXYALL	12	obsoleted, do not reuse here */
604 #define ICMPV6CTL_NODEINFO	13
605 #define ICMPV6CTL_ERRPPSLIMIT	14	/* ICMPv6 error pps limitation */
606 #define ICMPV6CTL_ND6_MAXNUDHINT	15
607 #define ICMPV6CTL_MTUDISC_HIWAT	16
608 #define ICMPV6CTL_MTUDISC_LOWAT	17
609 #define ICMPV6CTL_ND6_DEBUG	18
610 #define ICMPV6CTL_ND6_DRLIST	19
611 #define ICMPV6CTL_ND6_PRLIST	20
612 #define	ICMPV6CTL_ND6_MAXQLEN	24
613 #define ICMPV6CTL_MAXID		25
614 
615 #define ICMPV6CTL_NAMES { \
616 	{ 0, 0 }, \
617 	{ 0, 0 }, \
618 	{ "rediraccept", CTLTYPE_INT }, \
619 	{ "redirtimeout", CTLTYPE_INT }, \
620 	{ 0, 0 }, \
621 	{ 0, 0 }, \
622 	{ "nd6_prune", CTLTYPE_INT }, \
623 	{ 0, 0 }, \
624 	{ "nd6_delay", CTLTYPE_INT }, \
625 	{ "nd6_umaxtries", CTLTYPE_INT }, \
626 	{ "nd6_mmaxtries", CTLTYPE_INT }, \
627 	{ "nd6_useloopback", CTLTYPE_INT }, \
628 	{ 0, 0 }, \
629 	{ "nodeinfo", CTLTYPE_INT }, \
630 	{ "errppslimit", CTLTYPE_INT }, \
631 	{ "nd6_maxnudhint", CTLTYPE_INT }, \
632 	{ "mtudisc_hiwat", CTLTYPE_INT }, \
633 	{ "mtudisc_lowat", CTLTYPE_INT }, \
634 	{ "nd6_debug", CTLTYPE_INT }, \
635 	{ 0, 0 }, \
636 	{ 0, 0 }, \
637 	{ 0, 0 }, \
638 	{ 0, 0 }, \
639 	{ 0, 0 }, \
640 	{ "nd6_maxqueuelen", CTLTYPE_INT }, \
641 }
642 
643 #define RTF_PROBEMTU	RTF_PROTO1
644 
645 #ifdef _KERNEL
646 struct	rtentry;
647 struct	rttimer;
648 struct	in6_multi;
649 
650 void	icmp6_init(void);
651 void	icmp6_paramerror(struct mbuf *, int);
652 void	icmp6_error(struct mbuf *, int, int, int);
653 void	icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
654 int	icmp6_input(struct mbuf **, int *, int);
655 void	icmp6_fasttimo(void);
656 void	icmp6_reflect(struct mbuf *, size_t);
657 void	icmp6_prepare(struct mbuf *);
658 void	icmp6_redirect_input(struct mbuf *, int);
659 void	icmp6_redirect_output(struct mbuf *, struct rtentry *);
660 int	icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
661 
662 void	icmp6_statinc(u_int);
663 
664 struct	ip6ctlparam;
665 void	icmp6_mtudisc_update(struct ip6ctlparam *, int);
666 void	icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
667 
668 /* XXX: is this the right place for these macros? */
669 #define icmp6_ifstat_inc(ifp, tag) \
670 do {								\
671 	if (ifp)						\
672 		((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
673 } while (/*CONSTCOND*/ 0)
674 
675 #define icmp6_ifoutstat_inc(ifp, type, code) \
676 do { \
677 		icmp6_ifstat_inc(ifp, ifs6_out_msg); \
678 		switch(type) { \
679 		 case ICMP6_DST_UNREACH: \
680 			 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
681 			 if (code == ICMP6_DST_UNREACH_ADMIN) \
682 				 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
683 			 break; \
684 		 case ICMP6_PACKET_TOO_BIG: \
685 			 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
686 			 break; \
687 		 case ICMP6_TIME_EXCEEDED: \
688 			 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
689 			 break; \
690 		 case ICMP6_PARAM_PROB: \
691 			 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
692 			 break; \
693 		 case ICMP6_ECHO_REQUEST: \
694 			 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
695 			 break; \
696 		 case ICMP6_ECHO_REPLY: \
697 			 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
698 			 break; \
699 		 case MLD_LISTENER_QUERY: \
700 			 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
701 			 break; \
702 		 case MLD_LISTENER_REPORT: \
703 			 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
704 			 break; \
705 		 case MLD_LISTENER_DONE: \
706 			 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
707 			 break; \
708 		 case ND_ROUTER_SOLICIT: \
709 			 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
710 			 break; \
711 		 case ND_ROUTER_ADVERT: \
712 			 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
713 			 break; \
714 		 case ND_NEIGHBOR_SOLICIT: \
715 			 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
716 			 break; \
717 		 case ND_NEIGHBOR_ADVERT: \
718 			 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
719 			 break; \
720 		 case ND_REDIRECT: \
721 			 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
722 			 break; \
723 		} \
724 } while (/*CONSTCOND*/ 0)
725 
726 extern int	icmp6_rediraccept;	/* accept/process redirects */
727 extern int	icmp6_redirtimeout;	/* cache time for redirect routes */
728 #endif /* _KERNEL */
729 
730 #endif /* !_NETINET_ICMP6_H_ */
731