master
1/* $KAME: icmp6.h,v 1.46 2001/04/27 15:09:48 itojun Exp $ */
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
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#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 resp (to sender) */
133#define MLD_MTRACE 201 /* mtrace messages */
134
135#ifndef _KERNEL
136#define MLD6_MTRACE_RESP MLD_MTRACE_RESP
137#define MLD6_MTRACE MLD_MTRACE
138#endif
139
140#define ICMP6_MAXTYPE 201
141
142#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
143#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
144#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
145#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
146#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
147#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
148#define ICMP6_DST_UNREACH_POLICY 5 /* failed ingress/egress policy */
149#define ICMP6_DST_UNREACH_REJECT 6 /* Reject route to destination */
150#define ICMP6_DST_UNREACH_SRCROUTE 7 /* Error in source routing header */
151
152#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
153#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
154
155#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
156#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
157#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
158
159#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
160
161#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
162#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
163#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
164
165#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
166#define ICMP6_NI_REFUSED 1 /* node information request is refused */
167#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
168
169#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
170#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
171#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
172
173/* Used in kernel only */
174#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
175#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
176
177/*
178 * Multicast Listener Discovery
179 */
180struct mld_hdr {
181 struct icmp6_hdr mld_icmp6_hdr;
182 struct in6_addr mld_addr; /* multicast address */
183} __packed;
184
185/* definitions to provide backward compatibility to old KAME applications */
186#ifndef _KERNEL
187#define mld6_hdr mld_hdr
188#define mld6_type mld_type
189#define mld6_code mld_code
190#define mld6_cksum mld_cksum
191#define mld6_maxdelay mld_maxdelay
192#define mld6_reserved mld_reserved
193#define mld6_addr mld_addr
194#endif
195
196/* shortcut macro definitions */
197#define mld_type mld_icmp6_hdr.icmp6_type
198#define mld_code mld_icmp6_hdr.icmp6_code
199#define mld_cksum mld_icmp6_hdr.icmp6_cksum
200#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
201#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
202#define mld_v2_reserved mld_icmp6_hdr.icmp6_data16[0]
203#define mld_v2_numrecs mld_icmp6_hdr.icmp6_data16[1]
204
205/*
206 * Neighbor Discovery
207 */
208
209struct nd_router_solicit { /* router solicitation */
210 struct icmp6_hdr nd_rs_hdr;
211 /* could be followed by options */
212} __packed;
213
214#define nd_rs_type nd_rs_hdr.icmp6_type
215#define nd_rs_code nd_rs_hdr.icmp6_code
216#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
217#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
218
219struct nd_router_advert { /* router advertisement */
220 struct icmp6_hdr nd_ra_hdr;
221 u_int32_t nd_ra_reachable; /* reachable time */
222 u_int32_t nd_ra_retransmit; /* retransmit timer */
223 /* could be followed by options */
224} __packed;
225
226#define nd_ra_type nd_ra_hdr.icmp6_type
227#define nd_ra_code nd_ra_hdr.icmp6_code
228#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
229#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
230#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
231#define ND_RA_FLAG_MANAGED 0x80
232#define ND_RA_FLAG_OTHER 0x40
233#define ND_RA_FLAG_HA 0x20
234
235/*
236 * Router preference values based on draft-draves-ipngwg-router-selection-01.
237 * These are non-standard definitions.
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#ifdef EXPERIMENTAL
247#define ND_RA_FLAG_IPV6_ONLY 0x02 /* draft-ietf-6man-ipv6only-flag */
248#endif
249
250#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
251
252struct nd_neighbor_solicit { /* neighbor solicitation */
253 struct icmp6_hdr nd_ns_hdr;
254 struct in6_addr nd_ns_target; /*target address */
255 /* could be followed by options */
256} __packed;
257
258#define nd_ns_type nd_ns_hdr.icmp6_type
259#define nd_ns_code nd_ns_hdr.icmp6_code
260#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
261#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
262
263struct nd_neighbor_advert { /* neighbor advertisement */
264 struct icmp6_hdr nd_na_hdr;
265 struct in6_addr nd_na_target; /* target address */
266 /* could be followed by options */
267} __packed;
268
269#define nd_na_type nd_na_hdr.icmp6_type
270#define nd_na_code nd_na_hdr.icmp6_code
271#define nd_na_cksum nd_na_hdr.icmp6_cksum
272#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
273#if BYTE_ORDER == BIG_ENDIAN
274#define ND_NA_FLAG_ROUTER 0x80000000
275#define ND_NA_FLAG_SOLICITED 0x40000000
276#define ND_NA_FLAG_OVERRIDE 0x20000000
277#else
278#if BYTE_ORDER == LITTLE_ENDIAN
279#define ND_NA_FLAG_ROUTER 0x80
280#define ND_NA_FLAG_SOLICITED 0x40
281#define ND_NA_FLAG_OVERRIDE 0x20
282#endif
283#endif
284
285struct nd_redirect { /* redirect */
286 struct icmp6_hdr nd_rd_hdr;
287 struct in6_addr nd_rd_target; /* target address */
288 struct in6_addr nd_rd_dst; /* destination address */
289 /* could be followed by options */
290} __packed;
291
292#define nd_rd_type nd_rd_hdr.icmp6_type
293#define nd_rd_code nd_rd_hdr.icmp6_code
294#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
295#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
296
297struct nd_opt_hdr { /* Neighbor discovery option header */
298 u_int8_t nd_opt_type;
299 u_int8_t nd_opt_len;
300 /* followed by option specific data*/
301} __packed;
302
303#define ND_OPT_SOURCE_LINKADDR 1
304#define ND_OPT_TARGET_LINKADDR 2
305#define ND_OPT_PREFIX_INFORMATION 3
306#define ND_OPT_REDIRECTED_HEADER 4
307#define ND_OPT_MTU 5
308#define ND_OPT_NONCE 14 /* RFC 3971 */
309#define ND_OPT_ROUTE_INFO 24 /* RFC 4191 */
310#define ND_OPT_RDNSS 25 /* RFC 6106 */
311#define ND_OPT_DNSSL 31 /* RFC 6106 */
312#define ND_OPT_MAX 31
313
314struct nd_opt_prefix_info { /* prefix information */
315 u_int8_t nd_opt_pi_type;
316 u_int8_t nd_opt_pi_len;
317 u_int8_t nd_opt_pi_prefix_len;
318 u_int8_t nd_opt_pi_flags_reserved;
319 u_int32_t nd_opt_pi_valid_time;
320 u_int32_t nd_opt_pi_preferred_time;
321 u_int32_t nd_opt_pi_reserved2;
322 struct in6_addr nd_opt_pi_prefix;
323} __packed;
324
325#define ND_OPT_PI_FLAG_ONLINK 0x80
326#define ND_OPT_PI_FLAG_AUTO 0x40
327
328struct nd_opt_rd_hdr { /* redirected header */
329 u_int8_t nd_opt_rh_type;
330 u_int8_t nd_opt_rh_len;
331 u_int16_t nd_opt_rh_reserved1;
332 u_int32_t nd_opt_rh_reserved2;
333 /* followed by IP header and data */
334} __packed;
335
336struct nd_opt_mtu { /* MTU option */
337 u_int8_t nd_opt_mtu_type;
338 u_int8_t nd_opt_mtu_len;
339 u_int16_t nd_opt_mtu_reserved;
340 u_int32_t nd_opt_mtu_mtu;
341} __packed;
342
343#define ND_OPT_NONCE_LEN ((1 * 8) - 2)
344#if ((ND_OPT_NONCE_LEN + 2) % 8) != 0
345#error "(ND_OPT_NONCE_LEN + 2) must be a multiple of 8."
346#endif
347struct nd_opt_nonce { /* nonce option */
348 u_int8_t nd_opt_nonce_type;
349 u_int8_t nd_opt_nonce_len;
350 u_int8_t nd_opt_nonce[ND_OPT_NONCE_LEN];
351} __packed;
352
353struct nd_opt_route_info { /* route info */
354 u_int8_t nd_opt_rti_type;
355 u_int8_t nd_opt_rti_len;
356 u_int8_t nd_opt_rti_prefixlen;
357 u_int8_t nd_opt_rti_flags;
358 u_int32_t nd_opt_rti_lifetime;
359 /* prefix follows */
360} __packed;
361
362struct nd_opt_rdnss { /* RDNSS option (RFC 6106) */
363 u_int8_t nd_opt_rdnss_type;
364 u_int8_t nd_opt_rdnss_len;
365 u_int16_t nd_opt_rdnss_reserved;
366 u_int32_t nd_opt_rdnss_lifetime;
367 /* followed by list of recursive DNS servers */
368} __packed;
369
370struct nd_opt_dnssl { /* DNSSL option (RFC 6106) */
371 u_int8_t nd_opt_dnssl_type;
372 u_int8_t nd_opt_dnssl_len;
373 u_int16_t nd_opt_dnssl_reserved;
374 u_int32_t nd_opt_dnssl_lifetime;
375 /* followed by list of DNS search domains */
376} __packed;
377
378/*
379 * icmp6 namelookup
380 */
381
382struct icmp6_namelookup {
383 struct icmp6_hdr icmp6_nl_hdr;
384 u_int8_t icmp6_nl_nonce[8];
385 int32_t icmp6_nl_ttl;
386#if 0
387 u_int8_t icmp6_nl_len;
388 u_int8_t icmp6_nl_name[3];
389#endif
390 /* could be followed by options */
391} __packed;
392
393/*
394 * icmp6 node information
395 */
396struct icmp6_nodeinfo {
397 struct icmp6_hdr icmp6_ni_hdr;
398 u_int8_t icmp6_ni_nonce[8];
399 /* could be followed by reply data */
400} __packed;
401
402#define ni_type icmp6_ni_hdr.icmp6_type
403#define ni_code icmp6_ni_hdr.icmp6_code
404#define ni_cksum icmp6_ni_hdr.icmp6_cksum
405#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
406#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
407
408#define NI_QTYPE_NOOP 0 /* NOOP */
409#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
410#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
411#define NI_QTYPE_DNSNAME 2 /* DNS Name */
412#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
413#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
414
415#if BYTE_ORDER == BIG_ENDIAN
416#define NI_SUPTYPE_FLAG_COMPRESS 0x1
417#define NI_FQDN_FLAG_VALIDTTL 0x1
418#elif BYTE_ORDER == LITTLE_ENDIAN
419#define NI_SUPTYPE_FLAG_COMPRESS 0x0100
420#define NI_FQDN_FLAG_VALIDTTL 0x0100
421#endif
422
423#ifdef NAME_LOOKUPS_04
424#if BYTE_ORDER == BIG_ENDIAN
425#define NI_NODEADDR_FLAG_LINKLOCAL 0x1
426#define NI_NODEADDR_FLAG_SITELOCAL 0x2
427#define NI_NODEADDR_FLAG_GLOBAL 0x4
428#define NI_NODEADDR_FLAG_ALL 0x8
429#define NI_NODEADDR_FLAG_TRUNCATE 0x10
430#define NI_NODEADDR_FLAG_ANYCAST 0x20 /* just experimental. not in spec */
431#elif BYTE_ORDER == LITTLE_ENDIAN
432#define NI_NODEADDR_FLAG_LINKLOCAL 0x0100
433#define NI_NODEADDR_FLAG_SITELOCAL 0x0200
434#define NI_NODEADDR_FLAG_GLOBAL 0x0400
435#define NI_NODEADDR_FLAG_ALL 0x0800
436#define NI_NODEADDR_FLAG_TRUNCATE 0x1000
437#define NI_NODEADDR_FLAG_ANYCAST 0x2000 /* just experimental. not in spec */
438#endif
439#else /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
440#if BYTE_ORDER == BIG_ENDIAN
441#define NI_NODEADDR_FLAG_TRUNCATE 0x1
442#define NI_NODEADDR_FLAG_ALL 0x2
443#define NI_NODEADDR_FLAG_COMPAT 0x4
444#define NI_NODEADDR_FLAG_LINKLOCAL 0x8
445#define NI_NODEADDR_FLAG_SITELOCAL 0x10
446#define NI_NODEADDR_FLAG_GLOBAL 0x20
447#define NI_NODEADDR_FLAG_ANYCAST 0x40 /* just experimental. not in spec */
448#elif BYTE_ORDER == LITTLE_ENDIAN
449#define NI_NODEADDR_FLAG_TRUNCATE 0x0100
450#define NI_NODEADDR_FLAG_ALL 0x0200
451#define NI_NODEADDR_FLAG_COMPAT 0x0400
452#define NI_NODEADDR_FLAG_LINKLOCAL 0x0800
453#define NI_NODEADDR_FLAG_SITELOCAL 0x1000
454#define NI_NODEADDR_FLAG_GLOBAL 0x2000
455#define NI_NODEADDR_FLAG_ANYCAST 0x4000 /* just experimental. not in spec */
456#endif
457#endif
458
459struct ni_reply_fqdn {
460 u_int32_t ni_fqdn_ttl; /* TTL */
461 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
462 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
463} __packed;
464
465/*
466 * Router Renumbering. as router-renum-08.txt
467 */
468struct icmp6_router_renum { /* router renumbering header */
469 struct icmp6_hdr rr_hdr;
470 u_int8_t rr_segnum;
471 u_int8_t rr_flags;
472 u_int16_t rr_maxdelay;
473 u_int32_t rr_reserved;
474} __packed;
475
476#define ICMP6_RR_FLAGS_TEST 0x80
477#define ICMP6_RR_FLAGS_REQRESULT 0x40
478#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
479#define ICMP6_RR_FLAGS_SPECSITE 0x10
480#define ICMP6_RR_FLAGS_PREVDONE 0x08
481
482#define rr_type rr_hdr.icmp6_type
483#define rr_code rr_hdr.icmp6_code
484#define rr_cksum rr_hdr.icmp6_cksum
485#define rr_seqnum rr_hdr.icmp6_data32[0]
486
487struct rr_pco_match { /* match prefix part */
488 u_int8_t rpm_code;
489 u_int8_t rpm_len;
490 u_int8_t rpm_ordinal;
491 u_int8_t rpm_matchlen;
492 u_int8_t rpm_minlen;
493 u_int8_t rpm_maxlen;
494 u_int16_t rpm_reserved;
495 struct in6_addr rpm_prefix;
496} __packed;
497
498#define RPM_PCO_ADD 1
499#define RPM_PCO_CHANGE 2
500#define RPM_PCO_SETGLOBAL 3
501#define RPM_PCO_MAX 4
502
503struct rr_pco_use { /* use prefix part */
504 u_int8_t rpu_uselen;
505 u_int8_t rpu_keeplen;
506 u_int8_t rpu_ramask;
507 u_int8_t rpu_raflags;
508 u_int32_t rpu_vltime;
509 u_int32_t rpu_pltime;
510 u_int32_t rpu_flags;
511 struct in6_addr rpu_prefix;
512} __packed;
513#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
514#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
515
516#if BYTE_ORDER == BIG_ENDIAN
517#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
518#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
519#elif BYTE_ORDER == LITTLE_ENDIAN
520#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
521#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
522#endif
523
524struct rr_result { /* router renumbering result message */
525 u_int16_t rrr_flags;
526 u_int8_t rrr_ordinal;
527 u_int8_t rrr_matchedlen;
528 u_int32_t rrr_ifid;
529 struct in6_addr rrr_prefix;
530} __packed;
531#if BYTE_ORDER == BIG_ENDIAN
532#define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
533#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
534#elif BYTE_ORDER == LITTLE_ENDIAN
535#define ICMP6_RR_RESULT_FLAGS_OOB 0x0200
536#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
537#endif
538
539/*
540 * icmp6 filter structures.
541 */
542
543struct icmp6_filter {
544 u_int32_t icmp6_filt[8];
545};
546
547#ifdef _KERNEL
548#define ICMP6_FILTER_SETPASSALL(filterp) \
549do { \
550 int i; u_char *p; \
551 p = (u_char *)filterp; \
552 for (i = 0; i < sizeof(struct icmp6_filter); i++) \
553 p[i] = 0xff; \
554} while (/*CONSTCOND*/ 0)
555#define ICMP6_FILTER_SETBLOCKALL(filterp) \
556 bzero(filterp, sizeof(struct icmp6_filter))
557#else /* _KERNEL */
558#define ICMP6_FILTER_SETPASSALL(filterp) \
559 memset(filterp, 0xff, sizeof(struct icmp6_filter))
560#define ICMP6_FILTER_SETBLOCKALL(filterp) \
561 memset(filterp, 0x00, sizeof(struct icmp6_filter))
562#endif /* _KERNEL */
563
564#define ICMP6_FILTER_SETPASS(type, filterp) \
565 (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
566#define ICMP6_FILTER_SETBLOCK(type, filterp) \
567 (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
568#define ICMP6_FILTER_WILLPASS(type, filterp) \
569 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
570#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
571 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
572
573/*
574 * Variables related to this implementation
575 * of the internet control message protocol version 6.
576 */
577struct icmp6errstat {
578 uint64_t icp6errs_dst_unreach_noroute;
579 uint64_t icp6errs_dst_unreach_admin;
580 uint64_t icp6errs_dst_unreach_beyondscope;
581 uint64_t icp6errs_dst_unreach_addr;
582 uint64_t icp6errs_dst_unreach_noport;
583 uint64_t icp6errs_packet_too_big;
584 uint64_t icp6errs_time_exceed_transit;
585 uint64_t icp6errs_time_exceed_reassembly;
586 uint64_t icp6errs_paramprob_header;
587 uint64_t icp6errs_paramprob_nextheader;
588 uint64_t icp6errs_paramprob_option;
589 uint64_t icp6errs_redirect; /* we regard redirect as an error here */
590 uint64_t icp6errs_unknown;
591};
592
593struct icmp6stat {
594/* statistics related to icmp6 packets generated */
595 uint64_t icp6s_error; /* # of calls to icmp6_error */
596 uint64_t icp6s_canterror; /* no error 'cuz old was icmp */
597 uint64_t icp6s_toofreq; /* no error 'cuz rate limitation */
598 uint64_t icp6s_outhist[256];
599/* statistics related to input message processed */
600 uint64_t icp6s_badcode; /* icmp6_code out of range */
601 uint64_t icp6s_tooshort; /* packet < sizeof(struct icmp6_hdr) */
602 uint64_t icp6s_checksum; /* bad checksum */
603 uint64_t icp6s_badlen; /* calculated bound mismatch */
604 uint64_t icp6s_dropped; /* # of packets dropped waiting for a resolution */
605 /*
606 * number of responses: this member is inherited from netinet code, but
607 * for netinet6 code, it is already available in icp6s_outhist[].
608 */
609 uint64_t icp6s_reflect;
610 uint64_t icp6s_inhist[256];
611 uint64_t icp6s_nd_toomanyopt; /* too many ND options */
612 struct icmp6errstat icp6s_outerrhist;
613#define icp6s_odst_unreach_noroute \
614 icp6s_outerrhist.icp6errs_dst_unreach_noroute
615#define icp6s_odst_unreach_admin icp6s_outerrhist.icp6errs_dst_unreach_admin
616#define icp6s_odst_unreach_beyondscope \
617 icp6s_outerrhist.icp6errs_dst_unreach_beyondscope
618#define icp6s_odst_unreach_addr icp6s_outerrhist.icp6errs_dst_unreach_addr
619#define icp6s_odst_unreach_noport icp6s_outerrhist.icp6errs_dst_unreach_noport
620#define icp6s_opacket_too_big icp6s_outerrhist.icp6errs_packet_too_big
621#define icp6s_otime_exceed_transit \
622 icp6s_outerrhist.icp6errs_time_exceed_transit
623#define icp6s_otime_exceed_reassembly \
624 icp6s_outerrhist.icp6errs_time_exceed_reassembly
625#define icp6s_oparamprob_header icp6s_outerrhist.icp6errs_paramprob_header
626#define icp6s_oparamprob_nextheader \
627 icp6s_outerrhist.icp6errs_paramprob_nextheader
628#define icp6s_oparamprob_option icp6s_outerrhist.icp6errs_paramprob_option
629#define icp6s_oredirect icp6s_outerrhist.icp6errs_redirect
630#define icp6s_ounknown icp6s_outerrhist.icp6errs_unknown
631 uint64_t icp6s_pmtuchg; /* path MTU changes */
632 uint64_t icp6s_nd_badopt; /* bad ND options */
633 uint64_t icp6s_badns; /* bad neighbor solicitation */
634 uint64_t icp6s_badna; /* bad neighbor advertisement */
635 uint64_t icp6s_badrs; /* bad router solicitation */
636 uint64_t icp6s_badra; /* bad router advertisement */
637 uint64_t icp6s_badredirect; /* bad redirect message */
638 uint64_t icp6s_overflowdefrtr; /* Too many default routers. */
639 uint64_t icp6s_overflowprfx; /* Too many prefixes. */
640 uint64_t icp6s_overflownndp; /* Too many neighbour entries. */
641 uint64_t icp6s_overflowredirect;/* Too many redirects. */
642 uint64_t icp6s_invlhlim; /* Invalid hop limit. */
643 uint64_t icp6s_spare[32];
644};
645
646#ifdef _KERNEL
647#include <sys/counter.h>
648
649#ifdef SYSCTL_DECL
650SYSCTL_DECL(_net_inet6_icmp6);
651#endif
652
653VNET_PCPUSTAT_DECLARE(struct icmp6stat, icmp6stat);
654/*
655 * In-kernel consumers can use these accessor macros directly to update
656 * stats.
657 */
658#define ICMP6STAT_ADD(name, val) \
659 VNET_PCPUSTAT_ADD(struct icmp6stat, icmp6stat, name, (val))
660#define ICMP6STAT_INC(name) ICMP6STAT_ADD(name, 1)
661
662/*
663 * Kernel module consumers must use this accessor macro.
664 */
665void kmod_icmp6stat_inc(int statnum);
666#define KMOD_ICMP6STAT_INC(name) \
667 kmod_icmp6stat_inc(offsetof(struct icmp6stat, name) / sizeof(uint64_t))
668#endif
669
670/*
671 * Names for ICMP sysctl objects
672 */
673#define ICMPV6CTL_STATS 1
674#define ICMPV6CTL_REDIRACCEPT 2 /* accept/process redirects */
675#define ICMPV6CTL_REDIRTIMEOUT 3 /* redirect cache time */
676#if 0 /*obsoleted*/
677#define ICMPV6CTL_ERRRATELIMIT 5 /* ICMPv6 error rate limitation */
678#endif
679#define ICMPV6CTL_ND6_PRUNE 6
680#define ICMPV6CTL_ND6_DELAY 8
681#define ICMPV6CTL_ND6_UMAXTRIES 9
682#define ICMPV6CTL_ND6_MMAXTRIES 10
683#define ICMPV6CTL_ND6_USELOOPBACK 11
684/*#define ICMPV6CTL_ND6_PROXYALL 12 obsoleted, do not reuse here */
685#define ICMPV6CTL_NODEINFO 13
686#define ICMPV6CTL_ERRPPSLIMIT 14 /* ICMPv6 error pps limitation */
687#define ICMPV6CTL_ND6_MAXNUDHINT 15
688#define ICMPV6CTL_MTUDISC_HIWAT 16
689#define ICMPV6CTL_MTUDISC_LOWAT 17
690#define ICMPV6CTL_ND6_DEBUG 18
691#define ICMPV6CTL_ND6_DRLIST 19
692#define ICMPV6CTL_ND6_PRLIST 20
693#define ICMPV6CTL_MLD_MAXSRCFILTER 21
694#define ICMPV6CTL_MLD_SOMAXSRC 22
695#define ICMPV6CTL_MLD_VERSION 23
696#define ICMPV6CTL_ND6_MAXQLEN 24
697#define ICMPV6CTL_NODEINFO_OLDMCPREFIX 25
698#define ICMPV6CTL_MAXID 26
699
700#ifdef _KERNEL
701# ifdef __STDC__
702struct nhop_object;
703struct rttimer;
704struct in6_multi;
705# endif
706void icmp6_paramerror(struct mbuf *, int);
707int icmp6_errmap(const struct icmp6_hdr *);
708void icmp6_error(struct mbuf *, int, int, int);
709void icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
710int icmp6_input(struct mbuf **, int *, int);
711void icmp6_prepare(struct mbuf *);
712void icmp6_redirect_input(struct mbuf *, int);
713void icmp6_redirect_output(struct mbuf *, struct nhop_object *);
714int icmp6_ratelimit(const struct in6_addr *, const int, const int);
715
716struct ip6ctlparam;
717void icmp6_mtudisc_update(struct ip6ctlparam *, int);
718
719/* XXX: is this the right place for these macros? */
720#define icmp6_ifstat_inc(ifp, tag) \
721do { \
722 if (ifp) \
723 counter_u64_add(((struct in6_ifextra *) \
724 ((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat[\
725 offsetof(struct icmp6_ifstat, tag) / sizeof(uint64_t)], 1);\
726} while (/*CONSTCOND*/ 0)
727
728#define icmp6_ifoutstat_inc(ifp, type, code) \
729do { \
730 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
731 if (type < ICMP6_INFOMSG_MASK) \
732 icmp6_ifstat_inc(ifp, ifs6_out_error); \
733 switch (type) { \
734 case ICMP6_DST_UNREACH: \
735 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
736 if (code == ICMP6_DST_UNREACH_ADMIN) \
737 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
738 break; \
739 case ICMP6_PACKET_TOO_BIG: \
740 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
741 break; \
742 case ICMP6_TIME_EXCEEDED: \
743 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
744 break; \
745 case ICMP6_PARAM_PROB: \
746 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
747 break; \
748 case ICMP6_ECHO_REQUEST: \
749 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
750 break; \
751 case ICMP6_ECHO_REPLY: \
752 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
753 break; \
754 case MLD_LISTENER_QUERY: \
755 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
756 break; \
757 case MLD_LISTENER_REPORT: \
758 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
759 break; \
760 case MLD_LISTENER_DONE: \
761 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
762 break; \
763 case ND_ROUTER_SOLICIT: \
764 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
765 break; \
766 case ND_ROUTER_ADVERT: \
767 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
768 break; \
769 case ND_NEIGHBOR_SOLICIT: \
770 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
771 break; \
772 case ND_NEIGHBOR_ADVERT: \
773 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
774 break; \
775 case ND_REDIRECT: \
776 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
777 break; \
778 } \
779} while (/*CONSTCOND*/ 0)
780
781#define ICMP6_NODEINFO_FQDNOK 0x1
782#define ICMP6_NODEINFO_NODEADDROK 0x2
783#define ICMP6_NODEINFO_TMPADDROK 0x4
784#define ICMP6_NODEINFO_GLOBALOK 0x8
785#endif /* _KERNEL */
786
787#endif /* not _NETINET_ICMP6_H_ */