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
71struct 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 */
176struct 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
205struct 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
215struct 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
243struct 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
254struct 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
276struct 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
288struct 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
309struct 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
318struct 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
332struct 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
340struct 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
347struct 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
359struct 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 */
373struct 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
436struct 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 */
445struct 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
464struct 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
480struct 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
501struct 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
520struct 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
646struct	rtentry;
647struct	rttimer;
648struct	in6_multi;
649
650void	icmp6_init(void);
651void	icmp6_paramerror(struct mbuf *, int);
652void	icmp6_error(struct mbuf *, int, int, int);
653void	icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
654int	icmp6_input(struct mbuf **, int *, int);
655void	icmp6_fasttimo(void);
656void	icmp6_reflect(struct mbuf *, size_t);
657void	icmp6_prepare(struct mbuf *);
658void	icmp6_redirect_input(struct mbuf *, int);
659void	icmp6_redirect_output(struct mbuf *, struct rtentry *);
660int	icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
661
662void	icmp6_statinc(u_int);
663
664struct	ip6ctlparam;
665void	icmp6_mtudisc_update(struct ip6ctlparam *, int);
666void	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) \
670do {								\
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) \
676do { \
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
726extern int	icmp6_rediraccept;	/* accept/process redirects */
727extern int	icmp6_redirtimeout;	/* cache time for redirect routes */
728#endif /* _KERNEL */
729
730#endif /* !_NETINET_ICMP6_H_ */
731