xref: /minix3/sys/netinet/icmp6.h (revision 37274f3cdbc3af02276b244b5057910ba92f7082)
1 /*	$NetBSD: icmp6.h,v 1.47 2013/07/01 12:43:15 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 #define MLD_LISTENER_REDUCTION MLD_LISTENER_DONE /* RFC3542 definition */
102 
103 /* RFC2292 decls */
104 #define ICMP6_MEMBERSHIP_QUERY		130	/* group membership query */
105 #define ICMP6_MEMBERSHIP_REPORT		131	/* group membership report */
106 #define ICMP6_MEMBERSHIP_REDUCTION	132	/* group membership termination */
107 
108 #ifndef _KERNEL
109 /* the followings are for backward compatibility to old KAME apps. */
110 #define MLD6_LISTENER_QUERY	MLD_LISTENER_QUERY
111 #define MLD6_LISTENER_REPORT	MLD_LISTENER_REPORT
112 #define MLD6_LISTENER_DONE	MLD_LISTENER_DONE
113 #endif
114 
115 #define ND_ROUTER_SOLICIT		133	/* router solicitation */
116 #define ND_ROUTER_ADVERT		134	/* router advertisement */
117 #define ND_NEIGHBOR_SOLICIT		135	/* neighbor solicitation */
118 #define ND_NEIGHBOR_ADVERT		136	/* neighbor advertisement */
119 #define ND_REDIRECT			137	/* redirect */
120 
121 #define ICMP6_ROUTER_RENUMBERING	138	/* router renumbering */
122 
123 #define ICMP6_WRUREQUEST		139	/* who are you request */
124 #define ICMP6_WRUREPLY			140	/* who are you reply */
125 #define ICMP6_FQDN_QUERY		139	/* FQDN query */
126 #define ICMP6_FQDN_REPLY		140	/* FQDN reply */
127 #define ICMP6_NI_QUERY			139	/* node information request */
128 #define ICMP6_NI_REPLY			140	/* node information reply */
129 #define MLDV2_LISTENER_REPORT		143	/* RFC3810 listener report */
130 
131 /* The definitions below are experimental. TBA */
132 #define MLD_MTRACE_RESP			200	/* mtrace response(to sender) */
133 #define MLD_MTRACE			201	/* mtrace messages */
134 
135 #ifndef _KERNEL
136 /* the followings are for backward compatibility to old KAME apps. */
137 #define MLD6_MTRACE_RESP	MLD_MTRACE_RESP
138 #define MLD6_MTRACE		MLD_MTRACE
139 #endif
140 
141 #define ICMP6_MAXTYPE			201
142 
143 #define ICMP6_DST_UNREACH_NOROUTE	0	/* no route to destination */
144 #define ICMP6_DST_UNREACH_ADMIN	 	1	/* administratively prohibited */
145 #define ICMP6_DST_UNREACH_NOTNEIGHBOR	2	/* not a neighbor(obsolete) */
146 #define ICMP6_DST_UNREACH_BEYONDSCOPE	2	/* beyond scope of source address */
147 #define ICMP6_DST_UNREACH_ADDR		3	/* address unreachable */
148 #define ICMP6_DST_UNREACH_NOPORT	4	/* port unreachable */
149 #define ICMP6_DST_UNREACH_POLICY	5	/* source address failed ingress/egress policy */
150 #define ICMP6_DST_UNREACH_REJROUTE	6	/* reject route to destination */
151 #define ICMP6_DST_UNREACH_SOURCERT	7	/* error in source routing header */
152 
153 #define ICMP6_TIME_EXCEED_TRANSIT 	0	/* ttl==0 in transit */
154 #define ICMP6_TIME_EXCEED_REASSEMBLY	1	/* ttl==0 in reass */
155 
156 #define ICMP6_PARAMPROB_HEADER 	 	0	/* erroneous header field */
157 #define ICMP6_PARAMPROB_NEXTHEADER	1	/* unrecognized next header */
158 #define ICMP6_PARAMPROB_OPTION		2	/* unrecognized option */
159 
160 #define ICMP6_INFOMSG_MASK		0x80	/* all informational messages */
161 
162 #define ICMP6_NI_SUBJ_IPV6	0	/* Query Subject is an IPv6 address */
163 #define ICMP6_NI_SUBJ_FQDN	1	/* Query Subject is a Domain name */
164 #define ICMP6_NI_SUBJ_IPV4	2	/* Query Subject is an IPv4 address */
165 
166 #define ICMP6_NI_SUCCESS	0	/* node information successful reply */
167 #define ICMP6_NI_REFUSED	1	/* node information request is refused */
168 #define ICMP6_NI_UNKNOWN	2	/* unknown Qtype */
169 
170 #define ICMP6_ROUTER_RENUMBERING_COMMAND  0	/* rr command */
171 #define ICMP6_ROUTER_RENUMBERING_RESULT   1	/* rr result */
172 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255	/* rr seq num reset */
173 
174 /* Used in kernel only */
175 #define ND_REDIRECT_ONLINK	0	/* redirect to an on-link node */
176 #define ND_REDIRECT_ROUTER	1	/* redirect to a better router */
177 
178 /*
179  * Multicast Listener Discovery
180  */
181 struct mld_hdr {
182 	struct icmp6_hdr	mld_icmp6_hdr;
183 	struct in6_addr		mld_addr; /* multicast address */
184 } __packed;
185 
186 /* definitions to provide backward compatibility to old KAME applications */
187 #ifndef _KERNEL
188 #define mld6_hdr	mld_hdr
189 #define mld6_type	mld_type
190 #define mld6_code	mld_code
191 #define mld6_cksum	mld_cksum
192 #define mld6_maxdelay	mld_maxdelay
193 #define mld6_reserved	mld_reserved
194 #define mld6_addr	mld_addr
195 #endif
196 
197 /* shortcut macro definitions */
198 #define mld_type	mld_icmp6_hdr.icmp6_type
199 #define mld_code	mld_icmp6_hdr.icmp6_code
200 #define mld_cksum	mld_icmp6_hdr.icmp6_cksum
201 #define mld_maxdelay	mld_icmp6_hdr.icmp6_data16[0]
202 #define mld_reserved	mld_icmp6_hdr.icmp6_data16[1]
203 
204 #define MLD_MINLEN			24
205 
206 /*
207  * Neighbor Discovery
208  */
209 
210 struct nd_router_solicit {	/* router solicitation */
211 	struct icmp6_hdr 	nd_rs_hdr;
212 	/* could be followed by options */
213 } __packed;
214 
215 #define nd_rs_type	nd_rs_hdr.icmp6_type
216 #define nd_rs_code	nd_rs_hdr.icmp6_code
217 #define nd_rs_cksum	nd_rs_hdr.icmp6_cksum
218 #define nd_rs_reserved	nd_rs_hdr.icmp6_data32[0]
219 
220 struct nd_router_advert {	/* router advertisement */
221 	struct icmp6_hdr	nd_ra_hdr;
222 	u_int32_t		nd_ra_reachable;	/* reachable time */
223 	u_int32_t		nd_ra_retransmit;	/* retransmit timer */
224 	/* could be followed by options */
225 } __packed;
226 
227 #define nd_ra_type		nd_ra_hdr.icmp6_type
228 #define nd_ra_code		nd_ra_hdr.icmp6_code
229 #define nd_ra_cksum		nd_ra_hdr.icmp6_cksum
230 #define nd_ra_curhoplimit	nd_ra_hdr.icmp6_data8[0]
231 #define nd_ra_flags_reserved	nd_ra_hdr.icmp6_data8[1]
232 #define ND_RA_FLAG_MANAGED	0x80
233 #define ND_RA_FLAG_OTHER	0x40
234 #define ND_RA_FLAG_HOME_AGENT	0x20
235 
236 /*
237  * Router preference values based on RFC4191.
238  */
239 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
240 
241 #define ND_RA_FLAG_RTPREF_HIGH	0x08 /* 00001000 */
242 #define ND_RA_FLAG_RTPREF_MEDIUM	0x00 /* 00000000 */
243 #define ND_RA_FLAG_RTPREF_LOW	0x18 /* 00011000 */
244 #define ND_RA_FLAG_RTPREF_RSV	0x10 /* 00010000 */
245 
246 #define nd_ra_router_lifetime	nd_ra_hdr.icmp6_data16[1]
247 
248 struct nd_neighbor_solicit {	/* neighbor solicitation */
249 	struct icmp6_hdr	nd_ns_hdr;
250 	struct in6_addr		nd_ns_target;	/*target address */
251 	/* could be followed by options */
252 } __packed;
253 
254 #define nd_ns_type		nd_ns_hdr.icmp6_type
255 #define nd_ns_code		nd_ns_hdr.icmp6_code
256 #define nd_ns_cksum		nd_ns_hdr.icmp6_cksum
257 #define nd_ns_reserved		nd_ns_hdr.icmp6_data32[0]
258 
259 struct nd_neighbor_advert {	/* neighbor advertisement */
260 	struct icmp6_hdr	nd_na_hdr;
261 	struct in6_addr		nd_na_target;	/* target address */
262 	/* could be followed by options */
263 } __packed;
264 
265 #define nd_na_type		nd_na_hdr.icmp6_type
266 #define nd_na_code		nd_na_hdr.icmp6_code
267 #define nd_na_cksum		nd_na_hdr.icmp6_cksum
268 #define nd_na_flags_reserved	nd_na_hdr.icmp6_data32[0]
269 #if BYTE_ORDER == BIG_ENDIAN
270 #define ND_NA_FLAG_ROUTER		0x80000000
271 #define ND_NA_FLAG_SOLICITED		0x40000000
272 #define ND_NA_FLAG_OVERRIDE		0x20000000
273 #else
274 #if BYTE_ORDER == LITTLE_ENDIAN
275 #define ND_NA_FLAG_ROUTER		0x80
276 #define ND_NA_FLAG_SOLICITED		0x40
277 #define ND_NA_FLAG_OVERRIDE		0x20
278 #endif
279 #endif
280 
281 struct nd_redirect {		/* redirect */
282 	struct icmp6_hdr	nd_rd_hdr;
283 	struct in6_addr		nd_rd_target;	/* target address */
284 	struct in6_addr		nd_rd_dst;	/* destination address */
285 	/* could be followed by options */
286 } __packed;
287 
288 #define nd_rd_type		nd_rd_hdr.icmp6_type
289 #define nd_rd_code		nd_rd_hdr.icmp6_code
290 #define nd_rd_cksum		nd_rd_hdr.icmp6_cksum
291 #define nd_rd_reserved		nd_rd_hdr.icmp6_data32[0]
292 
293 struct nd_opt_hdr {		/* Neighbor discovery option header */
294 	u_int8_t	nd_opt_type;
295 	u_int8_t	nd_opt_len;
296 	/* followed by option specific data*/
297 } __packed;
298 
299 #define ND_OPT_SOURCE_LINKADDR		1
300 #define ND_OPT_TARGET_LINKADDR		2
301 #define ND_OPT_PREFIX_INFORMATION	3
302 #define ND_OPT_REDIRECTED_HEADER	4
303 #define ND_OPT_MTU			5
304 #define ND_OPT_ADVINTERVAL		7
305 #define ND_OPT_HOMEAGENT_INFO		8
306 #define ND_OPT_SOURCE_ADDRLIST		9
307 #define ND_OPT_TARGET_ADDRLIST		10
308 #define ND_OPT_MAP			23	/* RFC 5380 */
309 #define ND_OPT_ROUTE_INFO		24	/* RFC 4191 */
310 #define ND_OPT_RDNSS			25	/* RFC 6016 */
311 #define ND_OPT_DNSSL			31	/* RFC 6016 */
312 
313 struct nd_opt_route_info {	/* route info */
314 	u_int8_t	nd_opt_rti_type;
315 	u_int8_t	nd_opt_rti_len;
316 	u_int8_t	nd_opt_rti_prefixlen;
317 	u_int8_t	nd_opt_rti_flags;
318 	u_int32_t	nd_opt_rti_lifetime;
319 	/* prefix follows */
320 };
321 
322 struct nd_opt_prefix_info {	/* prefix information */
323 	u_int8_t	nd_opt_pi_type;
324 	u_int8_t	nd_opt_pi_len;
325 	u_int8_t	nd_opt_pi_prefix_len;
326 	u_int8_t	nd_opt_pi_flags_reserved;
327 	u_int32_t	nd_opt_pi_valid_time;
328 	u_int32_t	nd_opt_pi_preferred_time;
329 	u_int32_t	nd_opt_pi_reserved2;
330 	struct in6_addr	nd_opt_pi_prefix;
331 } __packed;
332 
333 #define ND_OPT_PI_FLAG_ONLINK		0x80
334 #define ND_OPT_PI_FLAG_AUTO		0x40
335 
336 struct nd_opt_rd_hdr {		/* redirected header */
337 	u_int8_t	nd_opt_rh_type;
338 	u_int8_t	nd_opt_rh_len;
339 	u_int16_t	nd_opt_rh_reserved1;
340 	u_int32_t	nd_opt_rh_reserved2;
341 	/* followed by IP header and data */
342 } __packed;
343 
344 struct nd_opt_mtu {		/* MTU option */
345 	u_int8_t	nd_opt_mtu_type;
346 	u_int8_t	nd_opt_mtu_len;
347 	u_int16_t	nd_opt_mtu_reserved;
348 	u_int32_t	nd_opt_mtu_mtu;
349 } __packed;
350 
351 struct nd_opt_rdnss {		/* RDNSS option RFC 6106 */
352 	u_int8_t	nd_opt_rdnss_type;
353 	u_int8_t	nd_opt_rdnss_len;
354 	u_int16_t	nd_opt_rdnss_reserved;
355 	u_int32_t	nd_opt_rdnss_lifetime;
356 	/* followed by list of IP prefixes */
357 } __packed;
358 
359 struct nd_opt_dnssl {		/* DNSSL option RFC 6106 */
360 	u_int8_t	nd_opt_dnssl_type;
361 	u_int8_t	nd_opt_dnssl_len;
362 	u_int16_t	nd_opt_dnssl_reserved;
363 	u_int32_t	nd_opt_dnssl_lifetime;
364 	/* followed by list of IP prefixes */
365 } __packed;
366 
367 /*
368  * icmp6 namelookup
369  */
370 
371 struct icmp6_namelookup {
372 	struct icmp6_hdr 	icmp6_nl_hdr;
373 	u_int8_t	icmp6_nl_nonce[8];
374 	int32_t		icmp6_nl_ttl;
375 #if 0
376 	u_int8_t	icmp6_nl_len;
377 	u_int8_t	icmp6_nl_name[3];
378 #endif
379 	/* could be followed by options */
380 } __packed;
381 
382 /*
383  * icmp6 node information
384  */
385 struct icmp6_nodeinfo {
386 	struct icmp6_hdr icmp6_ni_hdr;
387 	u_int8_t icmp6_ni_nonce[8];
388 	/* could be followed by reply data */
389 } __packed;
390 
391 #define ni_type		icmp6_ni_hdr.icmp6_type
392 #define ni_code		icmp6_ni_hdr.icmp6_code
393 #define ni_cksum	icmp6_ni_hdr.icmp6_cksum
394 #define ni_qtype	icmp6_ni_hdr.icmp6_data16[0]
395 #define ni_flags	icmp6_ni_hdr.icmp6_data16[1]
396 
397 #define NI_QTYPE_NOOP		0 /* NOOP  */
398 #define NI_QTYPE_SUPTYPES	1 /* Supported Qtypes */
399 #define NI_QTYPE_FQDN		2 /* FQDN (draft 04) */
400 #define NI_QTYPE_DNSNAME	2 /* DNS Name */
401 #define NI_QTYPE_NODEADDR	3 /* Node Addresses */
402 #define NI_QTYPE_IPV4ADDR	4 /* IPv4 Addresses */
403 
404 #if BYTE_ORDER == BIG_ENDIAN
405 #define NI_SUPTYPE_FLAG_COMPRESS	0x1
406 #define NI_FQDN_FLAG_VALIDTTL		0x1
407 #elif BYTE_ORDER == LITTLE_ENDIAN
408 #define NI_SUPTYPE_FLAG_COMPRESS	0x0100
409 #define NI_FQDN_FLAG_VALIDTTL		0x0100
410 #endif
411 
412 #ifdef NAME_LOOKUPS_04
413 #if BYTE_ORDER == BIG_ENDIAN
414 #define NI_NODEADDR_FLAG_LINKLOCAL	0x1
415 #define NI_NODEADDR_FLAG_SITELOCAL	0x2
416 #define NI_NODEADDR_FLAG_GLOBAL		0x4
417 #define NI_NODEADDR_FLAG_ALL		0x8
418 #define NI_NODEADDR_FLAG_TRUNCATE	0x10
419 #define NI_NODEADDR_FLAG_ANYCAST	0x20 /* just experimental. not in spec */
420 #elif BYTE_ORDER == LITTLE_ENDIAN
421 #define NI_NODEADDR_FLAG_LINKLOCAL	0x0100
422 #define NI_NODEADDR_FLAG_SITELOCAL	0x0200
423 #define NI_NODEADDR_FLAG_GLOBAL		0x0400
424 #define NI_NODEADDR_FLAG_ALL		0x0800
425 #define NI_NODEADDR_FLAG_TRUNCATE	0x1000
426 #define NI_NODEADDR_FLAG_ANYCAST	0x2000 /* just experimental. not in spec */
427 #endif
428 #else  /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
429 #if BYTE_ORDER == BIG_ENDIAN
430 #define NI_NODEADDR_FLAG_TRUNCATE	0x1
431 #define NI_NODEADDR_FLAG_ALL		0x2
432 #define NI_NODEADDR_FLAG_COMPAT		0x4
433 #define NI_NODEADDR_FLAG_LINKLOCAL	0x8
434 #define NI_NODEADDR_FLAG_SITELOCAL	0x10
435 #define NI_NODEADDR_FLAG_GLOBAL		0x20
436 #define NI_NODEADDR_FLAG_ANYCAST	0x40 /* just experimental. not in spec */
437 #elif BYTE_ORDER == LITTLE_ENDIAN
438 #define NI_NODEADDR_FLAG_TRUNCATE	0x0100
439 #define NI_NODEADDR_FLAG_ALL		0x0200
440 #define NI_NODEADDR_FLAG_COMPAT		0x0400
441 #define NI_NODEADDR_FLAG_LINKLOCAL	0x0800
442 #define NI_NODEADDR_FLAG_SITELOCAL	0x1000
443 #define NI_NODEADDR_FLAG_GLOBAL		0x2000
444 #define NI_NODEADDR_FLAG_ANYCAST	0x4000 /* just experimental. not in spec */
445 #endif
446 #endif
447 
448 struct ni_reply_fqdn {
449 	u_int32_t ni_fqdn_ttl;	/* TTL */
450 	u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
451 	u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
452 } __packed;
453 
454 /*
455  * Router Renumbering. as router-renum-08.txt
456  */
457 struct icmp6_router_renum {	/* router renumbering header */
458 	struct icmp6_hdr	rr_hdr;
459 	u_int8_t	rr_segnum;
460 	u_int8_t	rr_flags;
461 	u_int16_t	rr_maxdelay;
462 	u_int32_t	rr_reserved;
463 } __packed;
464 
465 #define ICMP6_RR_FLAGS_TEST		0x80
466 #define ICMP6_RR_FLAGS_REQRESULT	0x40
467 #define ICMP6_RR_FLAGS_FORCEAPPLY	0x20
468 #define ICMP6_RR_FLAGS_SPECSITE		0x10
469 #define ICMP6_RR_FLAGS_PREVDONE		0x08
470 
471 #define rr_type		rr_hdr.icmp6_type
472 #define rr_code		rr_hdr.icmp6_code
473 #define rr_cksum	rr_hdr.icmp6_cksum
474 #define rr_seqnum 	rr_hdr.icmp6_data32[0]
475 
476 struct rr_pco_match {		/* match prefix part */
477 	u_int8_t	rpm_code;
478 	u_int8_t	rpm_len;
479 	u_int8_t	rpm_ordinal;
480 	u_int8_t	rpm_matchlen;
481 	u_int8_t	rpm_minlen;
482 	u_int8_t	rpm_maxlen;
483 	u_int16_t	rpm_reserved;
484 	struct	in6_addr	rpm_prefix;
485 } __packed;
486 
487 #define RPM_PCO_ADD		1
488 #define RPM_PCO_CHANGE		2
489 #define RPM_PCO_SETGLOBAL	3
490 #define RPM_PCO_MAX		4
491 
492 struct rr_pco_use {		/* use prefix part */
493 	u_int8_t	rpu_uselen;
494 	u_int8_t	rpu_keeplen;
495 	u_int8_t	rpu_ramask;
496 	u_int8_t	rpu_raflags;
497 	u_int32_t	rpu_vltime;
498 	u_int32_t	rpu_pltime;
499 	u_int32_t	rpu_flags;
500 	struct	in6_addr rpu_prefix;
501 } __packed;
502 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK	0x80
503 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO	0x40
504 
505 #if BYTE_ORDER == BIG_ENDIAN
506 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80000000
507 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40000000
508 #elif BYTE_ORDER == LITTLE_ENDIAN
509 #define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME     0x80
510 #define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME     0x40
511 #endif
512 
513 struct rr_result {		/* router renumbering result message */
514 	u_int16_t	rrr_flags;
515 	u_int8_t	rrr_ordinal;
516 	u_int8_t	rrr_matchedlen;
517 	u_int32_t	rrr_ifid;
518 	struct	in6_addr rrr_prefix;
519 } __packed;
520 #if BYTE_ORDER == BIG_ENDIAN
521 #define ICMP6_RR_RESULT_FLAGS_OOB		0x0002
522 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x0001
523 #elif BYTE_ORDER == LITTLE_ENDIAN
524 #define ICMP6_RR_RESULT_FLAGS_OOB		0x0200
525 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x0100
526 #endif
527 
528 /*
529  * icmp6 filter structures.
530  */
531 
532 struct icmp6_filter {
533 	u_int32_t icmp6_filt[8];
534 };
535 
536 #define	ICMP6_FILTER_SETPASSALL(filterp) \
537 	(void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
538 #define	ICMP6_FILTER_SETBLOCKALL(filterp) \
539 	(void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
540 #define	ICMP6_FILTER_SETPASS(type, filterp) \
541 	(((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
542 #define	ICMP6_FILTER_SETBLOCK(type, filterp) \
543 	(((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
544 #define	ICMP6_FILTER_WILLPASS(type, filterp) \
545 	((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
546 #define	ICMP6_FILTER_WILLBLOCK(type, filterp) \
547 	((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
548 
549 /*
550  * Variables related to this implementation
551  * of the internet control message protocol version 6.
552  */
553 
554 /*
555  * IPv6 ICMP statistics.
556  * Each counter is an unsigned 64-bit value.
557  */
558 #define	ICMP6_STAT_ERROR	0	/* # of calls to icmp6_error */
559 #define	ICMP6_STAT_CANTERROR	1	/* no error (old was icmp) */
560 #define	ICMP6_STAT_TOOFREQ	2	/* no error (rate limitation) */
561 #define	ICMP6_STAT_OUTHIST	3	/* # of output messages */
562 		/* space for 256 counters */
563 #define	ICMP6_STAT_BADCODE	259	/* icmp6_code out of range */
564 #define	ICMP6_STAT_TOOSHORT	260	/* packet < sizeof(struct icmp6_hdr) */
565 #define	ICMP6_STAT_CHECKSUM	261	/* bad checksum */
566 #define	ICMP6_STAT_BADLEN	262	/* calculated bound mismatch */
567 	/*
568 	 * number of responses; this member is inherited from the netinet code,
569 	 * but for netinet6 code, it is already available in outhist[].
570 	 */
571 #define	ICMP6_STAT_REFLECT	263
572 #define	ICMP6_STAT_INHIST	264	/* # of input messages */
573 		/* space for 256 counters */
574 #define	ICMP6_STAT_ND_TOOMANYOPT 520	/* too many ND options */
575 #define	ICMP6_STAT_OUTERRHIST	521
576 		/* space for 13 counters */
577 #define	ICMP6_STAT_PMTUCHG	534	/* path MTU changes */
578 #define	ICMP6_STAT_ND_BADOPT	535	/* bad ND options */
579 #define	ICMP6_STAT_BADNS	536	/* bad neighbor solicititation */
580 #define	ICMP6_STAT_BADNA	537	/* bad neighbor advertisement */
581 #define	ICMP6_STAT_BADRS	538	/* bad router solicitiation */
582 #define	ICMP6_STAT_BADRA	539	/* bad router advertisement */
583 #define	ICMP6_STAT_BADREDIRECT	540	/* bad redirect message */
584 #define ICMP6_STAT_DROPPED_RAROUTE 541	/* discarded routes from router advertisement */
585 
586 #define	ICMP6_NSTATS		542
587 
588 #define	ICMP6_ERRSTAT_DST_UNREACH_NOROUTE	0
589 #define	ICMP6_ERRSTAT_DST_UNREACH_ADMIN		1
590 #define	ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE	2
591 #define	ICMP6_ERRSTAT_DST_UNREACH_ADDR		3
592 #define	ICMP6_ERRSTAT_DST_UNREACH_NOPORT	4
593 #define	ICMP6_ERRSTAT_PACKET_TOO_BIG		5
594 #define	ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT	6
595 #define	ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY	7
596 #define	ICMP6_ERRSTAT_PARAMPROB_HEADER		8
597 #define	ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER	9
598 #define	ICMP6_ERRSTAT_PARAMPROB_OPTION		10
599 #define	ICMP6_ERRSTAT_REDIRECT			11
600 #define	ICMP6_ERRSTAT_UNKNOWN			12
601 
602 /*
603  * Names for ICMP sysctl objects
604  */
605 #define ICMPV6CTL_STATS		1
606 #define ICMPV6CTL_REDIRACCEPT	2	/* accept/process redirects */
607 #define ICMPV6CTL_REDIRTIMEOUT	3	/* redirect cache time */
608 #if 0	/*obsoleted*/
609 #define ICMPV6CTL_ERRRATELIMIT	5	/* ICMPv6 error rate limitation */
610 #endif
611 #define ICMPV6CTL_ND6_PRUNE	6
612 #define ICMPV6CTL_ND6_DELAY	8
613 #define ICMPV6CTL_ND6_UMAXTRIES	9
614 #define ICMPV6CTL_ND6_MMAXTRIES		10
615 #define ICMPV6CTL_ND6_USELOOPBACK	11
616 /*#define ICMPV6CTL_ND6_PROXYALL	12	obsoleted, do not reuse here */
617 #define ICMPV6CTL_NODEINFO	13
618 #define ICMPV6CTL_ERRPPSLIMIT	14	/* ICMPv6 error pps limitation */
619 #define ICMPV6CTL_ND6_MAXNUDHINT	15
620 #define ICMPV6CTL_MTUDISC_HIWAT	16
621 #define ICMPV6CTL_MTUDISC_LOWAT	17
622 #define ICMPV6CTL_ND6_DEBUG	18
623 #define ICMPV6CTL_ND6_DRLIST	19
624 #define ICMPV6CTL_ND6_PRLIST	20
625 #define	ICMPV6CTL_ND6_MAXQLEN	24
626 #define ICMPV6CTL_MAXID		25
627 
628 #define ICMPV6CTL_NAMES { \
629 	{ 0, 0 }, \
630 	{ 0, 0 }, \
631 	{ "rediraccept", CTLTYPE_INT }, \
632 	{ "redirtimeout", CTLTYPE_INT }, \
633 	{ 0, 0 }, \
634 	{ 0, 0 }, \
635 	{ "nd6_prune", CTLTYPE_INT }, \
636 	{ 0, 0 }, \
637 	{ "nd6_delay", CTLTYPE_INT }, \
638 	{ "nd6_umaxtries", CTLTYPE_INT }, \
639 	{ "nd6_mmaxtries", CTLTYPE_INT }, \
640 	{ "nd6_useloopback", CTLTYPE_INT }, \
641 	{ 0, 0 }, \
642 	{ "nodeinfo", CTLTYPE_INT }, \
643 	{ "errppslimit", CTLTYPE_INT }, \
644 	{ "nd6_maxnudhint", CTLTYPE_INT }, \
645 	{ "mtudisc_hiwat", CTLTYPE_INT }, \
646 	{ "mtudisc_lowat", CTLTYPE_INT }, \
647 	{ "nd6_debug", CTLTYPE_INT }, \
648 	{ 0, 0 }, \
649 	{ 0, 0 }, \
650 	{ 0, 0 }, \
651 	{ 0, 0 }, \
652 	{ 0, 0 }, \
653 	{ "nd6_maxqueuelen", CTLTYPE_INT }, \
654 }
655 
656 #ifdef _KERNEL
657 struct	rtentry;
658 struct	rttimer;
659 struct	in6_multi;
660 
661 void	icmp6_init(void);
662 void	icmp6_paramerror(struct mbuf *, int);
663 void	icmp6_error(struct mbuf *, int, int, int);
664 void	icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
665 int	icmp6_input(struct mbuf **, int *, int);
666 void	icmp6_fasttimo(void);
667 void	icmp6_reflect(struct mbuf *, size_t);
668 void	icmp6_prepare(struct mbuf *);
669 void	icmp6_redirect_input(struct mbuf *, int);
670 void	icmp6_redirect_output(struct mbuf *, struct rtentry *);
671 int	icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
672 
673 void	icmp6_statinc(u_int);
674 
675 struct	ip6ctlparam;
676 void	icmp6_mtudisc_update(struct ip6ctlparam *, int);
677 void	icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
678 
679 /* XXX: is this the right place for these macros? */
680 #define icmp6_ifstat_inc(ifp, tag) \
681 do {								\
682 	if (ifp)						\
683 		((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
684 } while (/*CONSTCOND*/ 0)
685 
686 #define icmp6_ifoutstat_inc(ifp, type, code) \
687 do { \
688 		icmp6_ifstat_inc(ifp, ifs6_out_msg); \
689 		switch(type) { \
690 		 case ICMP6_DST_UNREACH: \
691 			 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
692 			 if (code == ICMP6_DST_UNREACH_ADMIN) \
693 				 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
694 			 break; \
695 		 case ICMP6_PACKET_TOO_BIG: \
696 			 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
697 			 break; \
698 		 case ICMP6_TIME_EXCEEDED: \
699 			 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
700 			 break; \
701 		 case ICMP6_PARAM_PROB: \
702 			 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
703 			 break; \
704 		 case ICMP6_ECHO_REQUEST: \
705 			 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
706 			 break; \
707 		 case ICMP6_ECHO_REPLY: \
708 			 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
709 			 break; \
710 		 case MLD_LISTENER_QUERY: \
711 			 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
712 			 break; \
713 		 case MLD_LISTENER_REPORT: \
714 			 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
715 			 break; \
716 		 case MLD_LISTENER_DONE: \
717 			 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
718 			 break; \
719 		 case ND_ROUTER_SOLICIT: \
720 			 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
721 			 break; \
722 		 case ND_ROUTER_ADVERT: \
723 			 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
724 			 break; \
725 		 case ND_NEIGHBOR_SOLICIT: \
726 			 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
727 			 break; \
728 		 case ND_NEIGHBOR_ADVERT: \
729 			 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
730 			 break; \
731 		 case ND_REDIRECT: \
732 			 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
733 			 break; \
734 		} \
735 } while (/*CONSTCOND*/ 0)
736 
737 extern int	icmp6_rediraccept;	/* accept/process redirects */
738 extern int	icmp6_redirtimeout;	/* cache time for redirect routes */
739 #endif /* _KERNEL */
740 
741 #ifdef ICMP6_STRINGS
742 /* Info: http://www.iana.org/assignments/icmpv6-parameters */
743 
744 static const char * const icmp6_type_err[] = {
745 	"reserved0", "unreach", "packet_too_big", "timxceed", "paramprob",
746 	NULL
747 };
748 
749 static const char * const icmp6_type_info[] = {
750 	"echo", "echoreply",
751 	"mcastlistenq", "mcastlistenrep", "mcastlistendone",
752 	"rtsol", "rtadv", "neighsol", "neighadv", "redirect",
753 	"routerrenum", "nodeinfoq", "nodeinfor", "invneighsol", "invneighrep",
754 	"mcastlistenrep2", "haad_req", "haad_rep",
755 	"mobile_psol", "mobile_padv", "cga_sol", "cga_adv",
756 	"experimental150", "mcast_rtadv", "mcast_rtsol", "mcast_rtterm",
757 	"fmipv6_msg", "rpl_control", NULL
758 };
759 
760 static const char * const icmp6_code_none[] = { "none", NULL };
761 
762 static const char * const icmp6_code_unreach[] = {
763 	"noroute", "admin", "beyondscope", "addr", "port",
764 	"srcaddr_policy", "reject_route", "source_route_err", NULL
765 };
766 
767 static const char * const icmp6_code_timxceed[] = {
768 	"intrans", "reass", NULL
769 };
770 
771 static const char * const icmp6_code_paramprob[] = {
772 	"hdr_field", "nxthdr_type", "option", NULL
773 };
774 
775 /* not all informational icmps that have codes have a names array */
776 #endif
777 
778 #endif /* !_NETINET_ICMP6_H_ */
779