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
63#ifndef _NETINET_ICMP6_H_
64#define _NETINET_ICMP6_H_
65
66#include <sys/stdint.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_PREF64 38 /* RFC 8781 */
313#define ND_OPT_MAX 38
314
315struct nd_opt_prefix_info { /* prefix information */
316 u_int8_t nd_opt_pi_type;
317 u_int8_t nd_opt_pi_len;
318 u_int8_t nd_opt_pi_prefix_len;
319 u_int8_t nd_opt_pi_flags_reserved;
320 u_int32_t nd_opt_pi_valid_time;
321 u_int32_t nd_opt_pi_preferred_time;
322 u_int32_t nd_opt_pi_reserved2;
323 struct in6_addr nd_opt_pi_prefix;
324} __packed;
325
326#define ND_OPT_PI_FLAG_ONLINK 0x80
327#define ND_OPT_PI_FLAG_AUTO 0x40
328
329struct nd_opt_rd_hdr { /* redirected header */
330 u_int8_t nd_opt_rh_type;
331 u_int8_t nd_opt_rh_len;
332 u_int16_t nd_opt_rh_reserved1;
333 u_int32_t nd_opt_rh_reserved2;
334 /* followed by IP header and data */
335} __packed;
336
337struct nd_opt_mtu { /* MTU option */
338 u_int8_t nd_opt_mtu_type;
339 u_int8_t nd_opt_mtu_len;
340 u_int16_t nd_opt_mtu_reserved;
341 u_int32_t nd_opt_mtu_mtu;
342} __packed;
343
344#define ND_OPT_NONCE_LEN ((1 * 8) - 2)
345#if ((ND_OPT_NONCE_LEN + 2) % 8) != 0
346#error "(ND_OPT_NONCE_LEN + 2) must be a multiple of 8."
347#endif
348struct nd_opt_nonce { /* nonce option */
349 u_int8_t nd_opt_nonce_type;
350 u_int8_t nd_opt_nonce_len;
351 u_int8_t nd_opt_nonce[ND_OPT_NONCE_LEN];
352} __packed;
353
354struct nd_opt_route_info { /* route info */
355 u_int8_t nd_opt_rti_type;
356 u_int8_t nd_opt_rti_len;
357 u_int8_t nd_opt_rti_prefixlen;
358 u_int8_t nd_opt_rti_flags;
359 u_int32_t nd_opt_rti_lifetime;
360 /* prefix follows */
361} __packed;
362
363struct nd_opt_rdnss { /* RDNSS option (RFC 6106) */
364 u_int8_t nd_opt_rdnss_type;
365 u_int8_t nd_opt_rdnss_len;
366 u_int16_t nd_opt_rdnss_reserved;
367 u_int32_t nd_opt_rdnss_lifetime;
368 /* followed by list of recursive DNS servers */
369} __packed;
370
371struct nd_opt_dnssl { /* DNSSL option (RFC 6106) */
372 u_int8_t nd_opt_dnssl_type;
373 u_int8_t nd_opt_dnssl_len;
374 u_int16_t nd_opt_dnssl_reserved;
375 u_int32_t nd_opt_dnssl_lifetime;
376 /* followed by list of DNS search domains */
377} __packed;
378
379struct nd_opt_pref64 { /* PREF64 option (RFC 8781) */
380 uint8_t nd_opt_pref64_type;
381 uint8_t nd_opt_pref64_len;
382 /* bits 0-12 are the SL, bits 13-15 are the PLC */
383 uint16_t nd_opt_pref64_sl_plc;
384 char nd_opt_prefix[12];
385} __packed;
386
387/*
388 * icmp6 namelookup
389 */
390
391struct icmp6_namelookup {
392 struct icmp6_hdr icmp6_nl_hdr;
393 u_int8_t icmp6_nl_nonce[8];
394 int32_t icmp6_nl_ttl;
395#if 0
396 u_int8_t icmp6_nl_len;
397 u_int8_t icmp6_nl_name[3];
398#endif
399 /* could be followed by options */
400} __packed;
401
402/*
403 * icmp6 node information
404 */
405struct icmp6_nodeinfo {
406 struct icmp6_hdr icmp6_ni_hdr;
407 u_int8_t icmp6_ni_nonce[8];
408 /* could be followed by reply data */
409} __packed;
410
411#define ni_type icmp6_ni_hdr.icmp6_type
412#define ni_code icmp6_ni_hdr.icmp6_code
413#define ni_cksum icmp6_ni_hdr.icmp6_cksum
414#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
415#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
416
417#define NI_QTYPE_NOOP 0 /* NOOP */
418#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
419#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
420#define NI_QTYPE_DNSNAME 2 /* DNS Name */
421#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
422#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
423
424#if BYTE_ORDER == BIG_ENDIAN
425#define NI_SUPTYPE_FLAG_COMPRESS 0x1
426#define NI_FQDN_FLAG_VALIDTTL 0x1
427#elif BYTE_ORDER == LITTLE_ENDIAN
428#define NI_SUPTYPE_FLAG_COMPRESS 0x0100
429#define NI_FQDN_FLAG_VALIDTTL 0x0100
430#endif
431
432#ifdef NAME_LOOKUPS_04
433#if BYTE_ORDER == BIG_ENDIAN
434#define NI_NODEADDR_FLAG_LINKLOCAL 0x1
435#define NI_NODEADDR_FLAG_SITELOCAL 0x2
436#define NI_NODEADDR_FLAG_GLOBAL 0x4
437#define NI_NODEADDR_FLAG_ALL 0x8
438#define NI_NODEADDR_FLAG_TRUNCATE 0x10
439#define NI_NODEADDR_FLAG_ANYCAST 0x20 /* just experimental. not in spec */
440#elif BYTE_ORDER == LITTLE_ENDIAN
441#define NI_NODEADDR_FLAG_LINKLOCAL 0x0100
442#define NI_NODEADDR_FLAG_SITELOCAL 0x0200
443#define NI_NODEADDR_FLAG_GLOBAL 0x0400
444#define NI_NODEADDR_FLAG_ALL 0x0800
445#define NI_NODEADDR_FLAG_TRUNCATE 0x1000
446#define NI_NODEADDR_FLAG_ANYCAST 0x2000 /* just experimental. not in spec */
447#endif
448#else /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
449#if BYTE_ORDER == BIG_ENDIAN
450#define NI_NODEADDR_FLAG_TRUNCATE 0x1
451#define NI_NODEADDR_FLAG_ALL 0x2
452#define NI_NODEADDR_FLAG_COMPAT 0x4
453#define NI_NODEADDR_FLAG_LINKLOCAL 0x8
454#define NI_NODEADDR_FLAG_SITELOCAL 0x10
455#define NI_NODEADDR_FLAG_GLOBAL 0x20
456#define NI_NODEADDR_FLAG_ANYCAST 0x40 /* just experimental. not in spec */
457#elif BYTE_ORDER == LITTLE_ENDIAN
458#define NI_NODEADDR_FLAG_TRUNCATE 0x0100
459#define NI_NODEADDR_FLAG_ALL 0x0200
460#define NI_NODEADDR_FLAG_COMPAT 0x0400
461#define NI_NODEADDR_FLAG_LINKLOCAL 0x0800
462#define NI_NODEADDR_FLAG_SITELOCAL 0x1000
463#define NI_NODEADDR_FLAG_GLOBAL 0x2000
464#define NI_NODEADDR_FLAG_ANYCAST 0x4000 /* just experimental. not in spec */
465#endif
466#endif
467
468struct ni_reply_fqdn {
469 u_int32_t ni_fqdn_ttl; /* TTL */
470 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
471 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
472} __packed;
473
474/*
475 * Router Renumbering. as router-renum-08.txt
476 */
477struct icmp6_router_renum { /* router renumbering header */
478 struct icmp6_hdr rr_hdr;
479 u_int8_t rr_segnum;
480 u_int8_t rr_flags;
481 u_int16_t rr_maxdelay;
482 u_int32_t rr_reserved;
483} __packed;
484
485#define ICMP6_RR_FLAGS_TEST 0x80
486#define ICMP6_RR_FLAGS_REQRESULT 0x40
487#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
488#define ICMP6_RR_FLAGS_SPECSITE 0x10
489#define ICMP6_RR_FLAGS_PREVDONE 0x08
490
491#define rr_type rr_hdr.icmp6_type
492#define rr_code rr_hdr.icmp6_code
493#define rr_cksum rr_hdr.icmp6_cksum
494#define rr_seqnum rr_hdr.icmp6_data32[0]
495
496struct rr_pco_match { /* match prefix part */
497 u_int8_t rpm_code;
498 u_int8_t rpm_len;
499 u_int8_t rpm_ordinal;
500 u_int8_t rpm_matchlen;
501 u_int8_t rpm_minlen;
502 u_int8_t rpm_maxlen;
503 u_int16_t rpm_reserved;
504 struct in6_addr rpm_prefix;
505} __packed;
506
507#define RPM_PCO_ADD 1
508#define RPM_PCO_CHANGE 2
509#define RPM_PCO_SETGLOBAL 3
510#define RPM_PCO_MAX 4
511
512struct rr_pco_use { /* use prefix part */
513 u_int8_t rpu_uselen;
514 u_int8_t rpu_keeplen;
515 u_int8_t rpu_ramask;
516 u_int8_t rpu_raflags;
517 u_int32_t rpu_vltime;
518 u_int32_t rpu_pltime;
519 u_int32_t rpu_flags;
520 struct in6_addr rpu_prefix;
521} __packed;
522#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
523#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
524
525#if BYTE_ORDER == BIG_ENDIAN
526#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
527#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
528#elif BYTE_ORDER == LITTLE_ENDIAN
529#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
530#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
531#endif
532
533struct rr_result { /* router renumbering result message */
534 u_int16_t rrr_flags;
535 u_int8_t rrr_ordinal;
536 u_int8_t rrr_matchedlen;
537 u_int32_t rrr_ifid;
538 struct in6_addr rrr_prefix;
539} __packed;
540#if BYTE_ORDER == BIG_ENDIAN
541#define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
542#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
543#elif BYTE_ORDER == LITTLE_ENDIAN
544#define ICMP6_RR_RESULT_FLAGS_OOB 0x0200
545#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
546#endif
547
548/*
549 * icmp6 filter structures.
550 */
551
552struct icmp6_filter {
553 u_int32_t icmp6_filt[8];
554};
555
556#ifdef _KERNEL
557#define ICMP6_FILTER_SETPASSALL(filterp) \
558do { \
559 int i; u_char *p; \
560 p = (u_char *)filterp; \
561 for (i = 0; i < sizeof(struct icmp6_filter); i++) \
562 p[i] = 0xff; \
563} while (/*CONSTCOND*/ 0)
564#define ICMP6_FILTER_SETBLOCKALL(filterp) \
565 bzero(filterp, sizeof(struct icmp6_filter))
566#else /* _KERNEL */
567#define ICMP6_FILTER_SETPASSALL(filterp) \
568 memset(filterp, 0xff, sizeof(struct icmp6_filter))
569#define ICMP6_FILTER_SETBLOCKALL(filterp) \
570 memset(filterp, 0x00, sizeof(struct icmp6_filter))
571#endif /* _KERNEL */
572
573#define ICMP6_FILTER_SETPASS(type, filterp) \
574 (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
575#define ICMP6_FILTER_SETBLOCK(type, filterp) \
576 (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
577#define ICMP6_FILTER_WILLPASS(type, filterp) \
578 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
579#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
580 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
581
582/*
583 * Variables related to this implementation
584 * of the internet control message protocol version 6.
585 */
586struct icmp6stat {
587/* statistics related to icmp6 packets generated */
588 uint64_t icp6s_error; /* # of calls to icmp6_error */
589 uint64_t icp6s_canterror; /* no error 'cuz old was icmp */
590 uint64_t icp6s_toofreq; /* no error 'cuz rate limitation */
591 uint64_t icp6s_outhist[256];
592/* statistics related to input message processed */
593 uint64_t icp6s_badcode; /* icmp6_code out of range */
594 uint64_t icp6s_tooshort; /* packet < sizeof(struct icmp6_hdr) */
595 uint64_t icp6s_checksum; /* bad checksum */
596 uint64_t icp6s_badlen; /* calculated bound mismatch */
597 uint64_t icp6s_dropped; /* # of packets dropped waiting for a resolution */
598 /*
599 * number of responses: this member is inherited from netinet code, but
600 * for netinet6 code, it is already available in icp6s_outhist[].
601 */
602 uint64_t icp6s_reflect;
603 uint64_t icp6s_inhist[256];
604 uint64_t icp6s_nd_toomanyopt; /* too many ND options */
605 uint64_t icp6s_odst_unreach_noroute;
606 uint64_t icp6s_odst_unreach_admin;
607 uint64_t icp6s_odst_unreach_beyondscope;
608 uint64_t icp6s_odst_unreach_addr;
609 uint64_t icp6s_odst_unreach_noport;
610 uint64_t icp6s_opacket_too_big;
611 uint64_t icp6s_otime_exceed_transit;
612 uint64_t icp6s_otime_exceed_reassembly;
613 uint64_t icp6s_oparamprob_header;
614 uint64_t icp6s_oparamprob_nextheader;
615 uint64_t icp6s_oparamprob_option;
616 uint64_t icp6s_oredirect;
617 uint64_t icp6s_ounknown;
618 uint64_t icp6s_pmtuchg; /* path MTU changes */
619 uint64_t icp6s_nd_badopt; /* bad ND options */
620 uint64_t icp6s_badns; /* bad neighbor solicitation */
621 uint64_t icp6s_badna; /* bad neighbor advertisement */
622 uint64_t icp6s_badrs; /* bad router solicitation */
623 uint64_t icp6s_badra; /* bad router advertisement */
624 uint64_t icp6s_badredirect; /* bad redirect message */
625 uint64_t icp6s_overflowdefrtr; /* Too many default routers. */
626 uint64_t icp6s_overflowprfx; /* Too many prefixes. */
627 uint64_t icp6s_overflownndp; /* Too many neighbour entries. */
628 uint64_t icp6s_overflowredirect;/* Too many redirects. */
629 uint64_t icp6s_invlhlim; /* Invalid hop limit. */
630 uint64_t icp6s_spare[32];
631};
632
633#ifdef _KERNEL
634#include <sys/counter.h>
635#include <netinet/in_kdtrace.h>
636
637#ifdef SYSCTL_DECL
638SYSCTL_DECL(_net_inet6_icmp6);
639#endif
640
641VNET_PCPUSTAT_DECLARE(struct icmp6stat, icmp6stat);
642/*
643 * In-kernel consumers can use these accessor macros directly to update
644 * stats.
645 */
646#define ICMP6STAT_ADD(name, val) \
647 do { \
648 MIB_SDT_PROBE1(icmp6, count, name, (val)); \
649 VNET_PCPUSTAT_ADD(struct icmp6stat, icmp6stat, name, (val)); \
650 } while (0)
651#define ICMP6STAT_INC(name) ICMP6STAT_ADD(name, 1)
652#define ICMP6STAT_INC2(name, type) \
653 do { \
654 MIB_SDT_PROBE2(icmp6, count, name, 1, type); \
655 VNET_PCPUSTAT_ADD(struct icmp6stat, icmp6stat, name[type], 1); \
656 } while (0)
657
658/*
659 * Kernel module consumers must use this accessor macro.
660 */
661void kmod_icmp6stat_inc(int statnum);
662#define KMOD_ICMP6STAT_INC(name) \
663 do { \
664 MIB_SDT_PROBE1(icmp6, count, name, 1); \
665 kmod_icmp6stat_inc( \
666 offsetof(struct icmp6stat, name) / sizeof(uint64_t)); \
667 } while (0)
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
716/* XXX: is this the right place for these macros? */
717#define icmp6_ifstat_inc(ifp, tag) \
718do { \
719 if (ifp) \
720 counter_u64_add(((struct in6_ifextra *) \
721 ((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat[\
722 offsetof(struct icmp6_ifstat, tag) / sizeof(uint64_t)], 1);\
723} while (/*CONSTCOND*/ 0)
724
725#define icmp6_ifoutstat_inc(ifp, type, code) \
726do { \
727 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
728 if (type < ICMP6_INFOMSG_MASK) \
729 icmp6_ifstat_inc(ifp, ifs6_out_error); \
730 switch (type) { \
731 case ICMP6_DST_UNREACH: \
732 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
733 if (code == ICMP6_DST_UNREACH_ADMIN) \
734 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
735 break; \
736 case ICMP6_PACKET_TOO_BIG: \
737 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
738 break; \
739 case ICMP6_TIME_EXCEEDED: \
740 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
741 break; \
742 case ICMP6_PARAM_PROB: \
743 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
744 break; \
745 case ICMP6_ECHO_REQUEST: \
746 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
747 break; \
748 case ICMP6_ECHO_REPLY: \
749 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
750 break; \
751 case MLD_LISTENER_QUERY: \
752 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
753 break; \
754 case MLD_LISTENER_REPORT: \
755 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
756 break; \
757 case MLD_LISTENER_DONE: \
758 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
759 break; \
760 case ND_ROUTER_SOLICIT: \
761 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
762 break; \
763 case ND_ROUTER_ADVERT: \
764 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
765 break; \
766 case ND_NEIGHBOR_SOLICIT: \
767 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
768 break; \
769 case ND_NEIGHBOR_ADVERT: \
770 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
771 break; \
772 case ND_REDIRECT: \
773 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
774 break; \
775 } \
776} while (/*CONSTCOND*/ 0)
777
778#define ICMP6_NODEINFO_FQDNOK 0x1
779#define ICMP6_NODEINFO_NODEADDROK 0x2
780#define ICMP6_NODEINFO_TMPADDROK 0x4
781#define ICMP6_NODEINFO_GLOBALOK 0x8
782#endif /* _KERNEL */
783
784#endif /* not _NETINET_ICMP6_H_ */