1/* $NetBSD: icmp6.h,v 1.61 2024/12/06 18:36:09 riastradh 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#include <sys/types.h>
69
70#include <netinet/in.h>
71
72#define ICMPV6_PLD_MAXLEN 1232 /* IPV6_MMTU - sizeof(struct ip6_hdr)
73 - sizeof(struct icmp6_hdr) */
74
75struct icmp6_hdr {
76 u_int8_t icmp6_type; /* type field */
77 u_int8_t icmp6_code; /* code field */
78 u_int16_t icmp6_cksum; /* checksum field */
79 union {
80 u_int32_t icmp6_un_data32[1]; /* type-specific field */
81 u_int16_t icmp6_un_data16[2]; /* type-specific field */
82 u_int8_t icmp6_un_data8[4]; /* type-specific field */
83 } icmp6_dataun;
84};
85
86#define icmp6_data32 icmp6_dataun.icmp6_un_data32
87#define icmp6_data16 icmp6_dataun.icmp6_un_data16
88#define icmp6_data8 icmp6_dataun.icmp6_un_data8
89#define icmp6_pptr icmp6_data32[0] /* parameter prob */
90#define icmp6_mtu icmp6_data32[0] /* packet too big */
91#define icmp6_id icmp6_data16[0] /* echo request/reply */
92#define icmp6_seq icmp6_data16[1] /* echo request/reply */
93#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
94
95#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
96#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
97#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
98#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
99
100#define ICMP6_ECHO_REQUEST 128 /* echo service */
101#define ICMP6_ECHO_REPLY 129 /* echo reply */
102#define MLD_LISTENER_QUERY 130 /* multicast listener query */
103#define MLD_LISTENER_REPORT 131 /* multicast listener report */
104#define MLD_LISTENER_DONE 132 /* multicast listener done */
105#define MLD_LISTENER_REDUCTION MLD_LISTENER_DONE /* RFC3542 definition */
106
107/* RFC2292 decls */
108#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
109#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
110#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
111
112#ifndef _KERNEL
113/* the followings are for backward compatibility to old KAME apps. */
114#define MLD6_LISTENER_QUERY MLD_LISTENER_QUERY
115#define MLD6_LISTENER_REPORT MLD_LISTENER_REPORT
116#define MLD6_LISTENER_DONE MLD_LISTENER_DONE
117#endif
118
119#define ND_ROUTER_SOLICIT 133 /* router solicitation */
120#define ND_ROUTER_ADVERT 134 /* router advertisement */
121#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
122#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
123#define ND_REDIRECT 137 /* redirect */
124
125#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
126
127#define ICMP6_WRUREQUEST 139 /* who are you request */
128#define ICMP6_WRUREPLY 140 /* who are you reply */
129#define ICMP6_FQDN_QUERY 139 /* FQDN query */
130#define ICMP6_FQDN_REPLY 140 /* FQDN reply */
131#define ICMP6_NI_QUERY 139 /* node information request */
132#define ICMP6_NI_REPLY 140 /* node information reply */
133#define MLDV2_LISTENER_REPORT 143 /* RFC3810 listener report */
134
135/* The definitions below are experimental. TBA */
136#define MLD_MTRACE_RESP 200 /* mtrace response(to sender) */
137#define MLD_MTRACE 201 /* mtrace messages */
138
139#ifndef _KERNEL
140/* the followings are for backward compatibility to old KAME apps. */
141#define MLD6_MTRACE_RESP MLD_MTRACE_RESP
142#define MLD6_MTRACE MLD_MTRACE
143#endif
144
145#define ICMP6_MAXTYPE 201
146
147#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
148#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
149#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
150#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
151#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
152#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
153#define ICMP6_DST_UNREACH_POLICY 5 /* source address failed ingress/egress policy */
154#define ICMP6_DST_UNREACH_REJROUTE 6 /* reject route to destination */
155#define ICMP6_DST_UNREACH_SOURCERT 7 /* error in source routing header */
156
157#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
158#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
159
160#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
161#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
162#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
163#define ICMP6_PARAMPROB_FRAGMENT 3 /* incomplete chain in frag */
164
165#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
166
167#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
168#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
169#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
170
171#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
172#define ICMP6_NI_REFUSED 1 /* node information request is refused */
173#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
174
175#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
176#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
177#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
178
179/* Used in kernel only */
180#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
181#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
182
183/*
184 * Multicast Listener Discovery
185 */
186struct mld_hdr {
187 struct icmp6_hdr mld_icmp6_hdr;
188 struct in6_addr mld_addr; /* multicast address */
189};
190
191/* definitions to provide backward compatibility to old KAME applications */
192#ifndef _KERNEL
193#define mld6_hdr mld_hdr
194#define mld6_type mld_type
195#define mld6_code mld_code
196#define mld6_cksum mld_cksum
197#define mld6_maxdelay mld_maxdelay
198#define mld6_reserved mld_reserved
199#define mld6_addr mld_addr
200#endif
201
202/* shortcut macro definitions */
203#define mld_type mld_icmp6_hdr.icmp6_type
204#define mld_code mld_icmp6_hdr.icmp6_code
205#define mld_cksum mld_icmp6_hdr.icmp6_cksum
206#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
207#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
208
209#define MLD_MINLEN 24
210
211/*
212 * Neighbor Discovery
213 */
214
215struct nd_router_solicit { /* router solicitation */
216 struct icmp6_hdr nd_rs_hdr;
217 /* could be followed by options */
218};
219
220#define nd_rs_type nd_rs_hdr.icmp6_type
221#define nd_rs_code nd_rs_hdr.icmp6_code
222#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
223#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
224
225struct nd_router_advert { /* router advertisement */
226 struct icmp6_hdr nd_ra_hdr;
227 u_int32_t nd_ra_reachable; /* reachable time */
228 u_int32_t nd_ra_retransmit; /* retransmit timer */
229 /* could be followed by options */
230};
231
232#define nd_ra_type nd_ra_hdr.icmp6_type
233#define nd_ra_code nd_ra_hdr.icmp6_code
234#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
235#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
236#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
237#define ND_RA_FLAG_MANAGED 0x80
238#define ND_RA_FLAG_OTHER 0x40
239#define ND_RA_FLAG_HOME_AGENT 0x20
240#define ND_RA_FLAG_PROXY 0x04
241
242/*
243 * Router preference values based on RFC4191.
244 */
245#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
246
247#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
248#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
249#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
250#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
251
252#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
253
254struct nd_neighbor_solicit { /* neighbor solicitation */
255 struct icmp6_hdr nd_ns_hdr;
256 struct in6_addr nd_ns_target; /*target address */
257 /* could be followed by options */
258};
259
260#define nd_ns_type nd_ns_hdr.icmp6_type
261#define nd_ns_code nd_ns_hdr.icmp6_code
262#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
263#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
264
265struct nd_neighbor_advert { /* neighbor advertisement */
266 struct icmp6_hdr nd_na_hdr;
267 struct in6_addr nd_na_target; /* target address */
268 /* could be followed by options */
269};
270
271#define nd_na_type nd_na_hdr.icmp6_type
272#define nd_na_code nd_na_hdr.icmp6_code
273#define nd_na_cksum nd_na_hdr.icmp6_cksum
274#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
275#if BYTE_ORDER == BIG_ENDIAN
276#define ND_NA_FLAG_ROUTER 0x80000000
277#define ND_NA_FLAG_SOLICITED 0x40000000
278#define ND_NA_FLAG_OVERRIDE 0x20000000
279#else
280#if BYTE_ORDER == LITTLE_ENDIAN
281#define ND_NA_FLAG_ROUTER 0x80
282#define ND_NA_FLAG_SOLICITED 0x40
283#define ND_NA_FLAG_OVERRIDE 0x20
284#endif
285#endif
286
287struct nd_redirect { /* redirect */
288 struct icmp6_hdr nd_rd_hdr;
289 struct in6_addr nd_rd_target; /* target address */
290 struct in6_addr nd_rd_dst; /* destination address */
291 /* could be followed by options */
292};
293
294#define nd_rd_type nd_rd_hdr.icmp6_type
295#define nd_rd_code nd_rd_hdr.icmp6_code
296#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
297#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
298
299struct nd_opt_hdr { /* Neighbor discovery option header */
300 u_int8_t nd_opt_type;
301 u_int8_t nd_opt_len;
302 /* followed by option specific data*/
303};
304
305#define ND_OPT_SOURCE_LINKADDR 1
306#define ND_OPT_TARGET_LINKADDR 2
307#define ND_OPT_PREFIX_INFORMATION 3
308#define ND_OPT_REDIRECTED_HEADER 4
309#define ND_OPT_MTU 5
310#define ND_OPT_ADVINTERVAL 7
311#define ND_OPT_HOMEAGENT_INFO 8
312#define ND_OPT_SOURCE_ADDRLIST 9
313#define ND_OPT_TARGET_ADDRLIST 10
314#define ND_OPT_NONCE 14 /* RFC 3971 */
315#define ND_OPT_MAP 23 /* RFC 5380 */
316#define ND_OPT_ROUTE_INFO 24 /* RFC 4191 */
317#define ND_OPT_RDNSS 25 /* RFC 6016 */
318#define ND_OPT_DNSSL 31 /* RFC 6016 */
319#define ND_OPT_MAX 31
320
321struct nd_opt_route_info { /* route info */
322 u_int8_t nd_opt_rti_type;
323 u_int8_t nd_opt_rti_len;
324 u_int8_t nd_opt_rti_prefixlen;
325 u_int8_t nd_opt_rti_flags;
326 u_int32_t nd_opt_rti_lifetime;
327 /* prefix follows */
328};
329
330struct nd_opt_prefix_info { /* prefix information */
331 u_int8_t nd_opt_pi_type;
332 u_int8_t nd_opt_pi_len;
333 u_int8_t nd_opt_pi_prefix_len;
334 u_int8_t nd_opt_pi_flags_reserved;
335 u_int32_t nd_opt_pi_valid_time;
336 u_int32_t nd_opt_pi_preferred_time;
337 u_int32_t nd_opt_pi_reserved2;
338 struct in6_addr nd_opt_pi_prefix;
339};
340
341#define ND_OPT_PI_FLAG_ONLINK 0x80
342#define ND_OPT_PI_FLAG_AUTO 0x40
343#define ND_OPT_PI_FLAG_ROUTER 0x20
344
345struct nd_opt_rd_hdr { /* redirected header */
346 u_int8_t nd_opt_rh_type;
347 u_int8_t nd_opt_rh_len;
348 u_int16_t nd_opt_rh_reserved1;
349 u_int32_t nd_opt_rh_reserved2;
350 /* followed by IP header and data */
351};
352
353struct nd_opt_mtu { /* MTU option */
354 u_int8_t nd_opt_mtu_type;
355 u_int8_t nd_opt_mtu_len;
356 u_int16_t nd_opt_mtu_reserved;
357 u_int32_t nd_opt_mtu_mtu;
358};
359
360#define ND_OPT_NONCE_LEN ((1 * 8) - 2)
361#if ((ND_OPT_NONCE_LEN + 2) % 8) != 0
362#error "(ND_OPT_NONCE_LEN + 2) must be a multiple of 8."
363#endif
364struct nd_opt_nonce {
365 u_int8_t nd_opt_nonce_type;
366 u_int8_t nd_opt_nonce_len;
367 u_int8_t nd_opt_nonce[ND_OPT_NONCE_LEN];
368};
369
370struct nd_opt_rdnss { /* RDNSS option RFC 6106 */
371 u_int8_t nd_opt_rdnss_type;
372 u_int8_t nd_opt_rdnss_len;
373 u_int16_t nd_opt_rdnss_reserved;
374 u_int32_t nd_opt_rdnss_lifetime;
375 /* followed by list of IP prefixes */
376};
377
378struct nd_opt_dnssl { /* DNSSL option RFC 6106 */
379 u_int8_t nd_opt_dnssl_type;
380 u_int8_t nd_opt_dnssl_len;
381 u_int16_t nd_opt_dnssl_reserved;
382 u_int32_t nd_opt_dnssl_lifetime;
383 /* followed by list of IP prefixes */
384};
385
386/*
387 * icmp6 namelookup
388 */
389
390struct icmp6_namelookup {
391 struct icmp6_hdr icmp6_nl_hdr;
392 u_int8_t icmp6_nl_nonce[8];
393 int32_t icmp6_nl_ttl;
394#if 0
395 u_int8_t icmp6_nl_len;
396 u_int8_t icmp6_nl_name[3];
397#endif
398 /* could be followed by options */
399};
400
401/*
402 * icmp6 node information
403 */
404struct icmp6_nodeinfo {
405 struct icmp6_hdr icmp6_ni_hdr;
406 u_int8_t icmp6_ni_nonce[8];
407 /* could be followed by reply data */
408};
409
410#define ni_type icmp6_ni_hdr.icmp6_type
411#define ni_code icmp6_ni_hdr.icmp6_code
412#define ni_cksum icmp6_ni_hdr.icmp6_cksum
413#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
414#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
415
416#define NI_QTYPE_NOOP 0 /* NOOP */
417#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
418#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
419#define NI_QTYPE_DNSNAME 2 /* DNS Name */
420#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
421#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
422
423#if BYTE_ORDER == BIG_ENDIAN
424#define NI_SUPTYPE_FLAG_COMPRESS 0x1
425#define NI_FQDN_FLAG_VALIDTTL 0x1
426#elif BYTE_ORDER == LITTLE_ENDIAN
427#define NI_SUPTYPE_FLAG_COMPRESS 0x0100
428#define NI_FQDN_FLAG_VALIDTTL 0x0100
429#endif
430
431#ifdef NAME_LOOKUPS_04
432#if BYTE_ORDER == BIG_ENDIAN
433#define NI_NODEADDR_FLAG_LINKLOCAL 0x1
434#define NI_NODEADDR_FLAG_SITELOCAL 0x2
435#define NI_NODEADDR_FLAG_GLOBAL 0x4
436#define NI_NODEADDR_FLAG_ALL 0x8
437#define NI_NODEADDR_FLAG_TRUNCATE 0x10
438#define NI_NODEADDR_FLAG_ANYCAST 0x20 /* just experimental. not in spec */
439#elif BYTE_ORDER == LITTLE_ENDIAN
440#define NI_NODEADDR_FLAG_LINKLOCAL 0x0100
441#define NI_NODEADDR_FLAG_SITELOCAL 0x0200
442#define NI_NODEADDR_FLAG_GLOBAL 0x0400
443#define NI_NODEADDR_FLAG_ALL 0x0800
444#define NI_NODEADDR_FLAG_TRUNCATE 0x1000
445#define NI_NODEADDR_FLAG_ANYCAST 0x2000 /* just experimental. not in spec */
446#endif
447#else /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
448#if BYTE_ORDER == BIG_ENDIAN
449#define NI_NODEADDR_FLAG_TRUNCATE 0x1
450#define NI_NODEADDR_FLAG_ALL 0x2
451#define NI_NODEADDR_FLAG_COMPAT 0x4
452#define NI_NODEADDR_FLAG_LINKLOCAL 0x8
453#define NI_NODEADDR_FLAG_SITELOCAL 0x10
454#define NI_NODEADDR_FLAG_GLOBAL 0x20
455#define NI_NODEADDR_FLAG_ANYCAST 0x40 /* just experimental. not in spec */
456#elif BYTE_ORDER == LITTLE_ENDIAN
457#define NI_NODEADDR_FLAG_TRUNCATE 0x0100
458#define NI_NODEADDR_FLAG_ALL 0x0200
459#define NI_NODEADDR_FLAG_COMPAT 0x0400
460#define NI_NODEADDR_FLAG_LINKLOCAL 0x0800
461#define NI_NODEADDR_FLAG_SITELOCAL 0x1000
462#define NI_NODEADDR_FLAG_GLOBAL 0x2000
463#define NI_NODEADDR_FLAG_ANYCAST 0x4000 /* just experimental. not in spec */
464#endif
465#endif
466
467struct ni_reply_fqdn {
468 u_int32_t ni_fqdn_ttl; /* TTL */
469 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
470 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
471};
472
473/*
474 * Router Renumbering. as router-renum-08.txt
475 */
476struct icmp6_router_renum { /* router renumbering header */
477 struct icmp6_hdr rr_hdr;
478 u_int8_t rr_segnum;
479 u_int8_t rr_flags;
480 u_int16_t rr_maxdelay;
481 u_int32_t rr_reserved;
482};
483
484#define ICMP6_RR_FLAGS_TEST 0x80
485#define ICMP6_RR_FLAGS_REQRESULT 0x40
486#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
487#define ICMP6_RR_FLAGS_SPECSITE 0x10
488#define ICMP6_RR_FLAGS_PREVDONE 0x08
489
490#define rr_type rr_hdr.icmp6_type
491#define rr_code rr_hdr.icmp6_code
492#define rr_cksum rr_hdr.icmp6_cksum
493#define rr_seqnum rr_hdr.icmp6_data32[0]
494
495struct rr_pco_match { /* match prefix part */
496 u_int8_t rpm_code;
497 u_int8_t rpm_len;
498 u_int8_t rpm_ordinal;
499 u_int8_t rpm_matchlen;
500 u_int8_t rpm_minlen;
501 u_int8_t rpm_maxlen;
502 u_int16_t rpm_reserved;
503 struct in6_addr rpm_prefix;
504};
505
506#define RPM_PCO_ADD 1
507#define RPM_PCO_CHANGE 2
508#define RPM_PCO_SETGLOBAL 3
509#define RPM_PCO_MAX 4
510
511struct rr_pco_use { /* use prefix part */
512 u_int8_t rpu_uselen;
513 u_int8_t rpu_keeplen;
514 u_int8_t rpu_ramask;
515 u_int8_t rpu_raflags;
516 u_int32_t rpu_vltime;
517 u_int32_t rpu_pltime;
518 u_int32_t rpu_flags;
519 struct in6_addr rpu_prefix;
520};
521#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
522#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
523
524#if BYTE_ORDER == BIG_ENDIAN
525#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
526#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
527#elif BYTE_ORDER == LITTLE_ENDIAN
528#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
529#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
530#endif
531
532struct rr_result { /* router renumbering result message */
533 u_int16_t rrr_flags;
534 u_int8_t rrr_ordinal;
535 u_int8_t rrr_matchedlen;
536 u_int32_t rrr_ifid;
537 struct in6_addr rrr_prefix;
538};
539#if BYTE_ORDER == BIG_ENDIAN
540#define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
541#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
542#elif BYTE_ORDER == LITTLE_ENDIAN
543#define ICMP6_RR_RESULT_FLAGS_OOB 0x0200
544#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
545#endif
546
547/*
548 * icmp6 filter structures.
549 */
550
551struct icmp6_filter {
552 u_int32_t icmp6_filt[8];
553};
554
555#define ICMP6_FILTER_SETPASSALL(filterp) \
556 (void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
557#define ICMP6_FILTER_SETBLOCKALL(filterp) \
558 (void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
559#define ICMP6_FILTER_SETPASS(type, filterp) \
560 (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
561#define ICMP6_FILTER_SETBLOCK(type, filterp) \
562 (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
563#define ICMP6_FILTER_WILLPASS(type, filterp) \
564 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
565#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
566 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
567
568/*
569 * Variables related to this implementation
570 * of the internet control message protocol version 6.
571 */
572
573/*
574 * IPv6 ICMP statistics.
575 * Each counter is an unsigned 64-bit value.
576 */
577#define ICMP6_STAT_ERROR 0 /* # of calls to icmp6_error */
578#define ICMP6_STAT_CANTERROR 1 /* no error (old was icmp) */
579#define ICMP6_STAT_TOOFREQ 2 /* no error (rate limitation) */
580#define ICMP6_STAT_OUTHIST 3 /* # of output messages */
581 /* space for 256 counters */
582#define ICMP6_STAT_BADCODE 259 /* icmp6_code out of range */
583#define ICMP6_STAT_TOOSHORT 260 /* packet < sizeof(struct icmp6_hdr) */
584#define ICMP6_STAT_CHECKSUM 261 /* bad checksum */
585#define ICMP6_STAT_BADLEN 262 /* calculated bound mismatch */
586 /*
587 * number of responses; this member is inherited from the netinet code,
588 * but for netinet6 code, it is already available in outhist[].
589 */
590#define ICMP6_STAT_REFLECT 263
591#define ICMP6_STAT_INHIST 264 /* # of input messages */
592 /* space for 256 counters */
593#define ICMP6_STAT_ND_TOOMANYOPT 520 /* too many ND options */
594#define ICMP6_STAT_OUTERRHIST 521
595 /* space for 13 counters */
596#define ICMP6_STAT_PMTUCHG 534 /* path MTU changes */
597#define ICMP6_STAT_ND_BADOPT 535 /* bad ND options */
598#define ICMP6_STAT_BADNS 536 /* bad neighbor solicititation */
599#define ICMP6_STAT_BADNA 537 /* bad neighbor advertisement */
600#define ICMP6_STAT_BADRS 538 /* bad router solicitiation */
601#define ICMP6_STAT_BADRA 539 /* bad router advertisement */
602#define ICMP6_STAT_BADREDIRECT 540 /* bad redirect message */
603#define ICMP6_STAT_DROPPED_RAROUTE 541 /* discarded routes from router advertisement */
604
605#define ICMP6_NSTATS 542
606
607#define ICMP6_ERRSTAT_DST_UNREACH_NOROUTE 0
608#define ICMP6_ERRSTAT_DST_UNREACH_ADMIN 1
609#define ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE 2
610#define ICMP6_ERRSTAT_DST_UNREACH_ADDR 3
611#define ICMP6_ERRSTAT_DST_UNREACH_NOPORT 4
612#define ICMP6_ERRSTAT_PACKET_TOO_BIG 5
613#define ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT 6
614#define ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY 7
615#define ICMP6_ERRSTAT_PARAMPROB_HEADER 8
616#define ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER 9
617#define ICMP6_ERRSTAT_PARAMPROB_OPTION 10
618#define ICMP6_ERRSTAT_REDIRECT 11
619#define ICMP6_ERRSTAT_UNKNOWN 12
620
621/*
622 * Names for ICMP sysctl objects
623 */
624#define ICMPV6CTL_STATS 1
625#define ICMPV6CTL_REDIRACCEPT 2 /* accept/process redirects */
626#define ICMPV6CTL_REDIRTIMEOUT 3 /* redirect cache time */
627#if 0 /*obsoleted*/
628#define ICMPV6CTL_ERRRATELIMIT 5 /* ICMPv6 error rate limitation */
629#endif
630#define ICMPV6CTL_ND6_PRUNE 6
631#define ICMPV6CTL_ND6_DELAY 8
632#define ICMPV6CTL_ND6_UMAXTRIES 9
633#define ICMPV6CTL_ND6_MMAXTRIES 10
634#define ICMPV6CTL_ND6_USELOOPBACK 11
635/*#define ICMPV6CTL_ND6_PROXYALL 12 obsoleted, do not reuse here */
636#define ICMPV6CTL_NODEINFO 13
637#define ICMPV6CTL_ERRPPSLIMIT 14 /* ICMPv6 error pps limitation */
638#define ICMPV6CTL_ND6_MAXNUDHINT 15
639#define ICMPV6CTL_MTUDISC_HIWAT 16
640#define ICMPV6CTL_MTUDISC_LOWAT 17
641#define ICMPV6CTL_ND6_DEBUG 18
642#ifdef _KERNEL
643#define OICMPV6CTL_ND6_DRLIST 19
644#define OICMPV6CTL_ND6_PRLIST 20
645#endif
646#define ICMPV6CTL_ND6_MAXQLEN 24
647#define ICMPV6CTL_REFLECT_PMTU 25
648#define ICMPV6CTL_DYNAMIC_RT_MSG 26
649
650#ifdef _KERNEL
651struct rtentry;
652
653void icmp6_init(void);
654void icmp6_paramerror(struct mbuf *, int);
655void icmp6_error(struct mbuf *, int, int, int);
656void icmp6_error2(struct mbuf *, int, int, int, struct ifnet *,
657 struct in6_addr *);
658int icmp6_input(struct mbuf **, int *, int);
659void icmp6_fasttimo(void);
660void icmp6_prepare(struct mbuf *);
661void icmp6_redirect_output(struct mbuf *, struct rtentry *);
662int icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
663
664void icmp6_statinc(u_int);
665
666struct ip6ctlparam;
667void icmp6_mtudisc_update(struct ip6ctlparam *, int);
668void icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
669
670/* XXX: is this the right place for these macros? */
671#define icmp6_ifstat_inc(ifp, tag) \
672do { \
673 if (ifp) \
674 ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
675} while (/*CONSTCOND*/ 0)
676
677#define icmp6_ifoutstat_inc(ifp, type, code) \
678do { \
679 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
680 switch(type) { \
681 case ICMP6_DST_UNREACH: \
682 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
683 if (code == ICMP6_DST_UNREACH_ADMIN) \
684 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
685 break; \
686 case ICMP6_PACKET_TOO_BIG: \
687 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
688 break; \
689 case ICMP6_TIME_EXCEEDED: \
690 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
691 break; \
692 case ICMP6_PARAM_PROB: \
693 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
694 break; \
695 case ICMP6_ECHO_REQUEST: \
696 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
697 break; \
698 case ICMP6_ECHO_REPLY: \
699 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
700 break; \
701 case MLD_LISTENER_QUERY: \
702 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
703 break; \
704 case MLD_LISTENER_REPORT: \
705 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
706 break; \
707 case MLD_LISTENER_DONE: \
708 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
709 break; \
710 case ND_ROUTER_SOLICIT: \
711 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
712 break; \
713 case ND_ROUTER_ADVERT: \
714 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
715 break; \
716 case ND_NEIGHBOR_SOLICIT: \
717 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
718 break; \
719 case ND_NEIGHBOR_ADVERT: \
720 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
721 break; \
722 case ND_REDIRECT: \
723 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
724 break; \
725 } \
726} while (/*CONSTCOND*/ 0)
727
728extern int icmp6_rediraccept; /* accept/process redirects */
729extern int icmp6_redirtimeout; /* cache time for redirect routes */
730#endif /* _KERNEL */
731
732#ifdef ICMP6_STRINGS
733/* Info: http://www.iana.org/assignments/icmpv6-parameters */
734
735static const char * const icmp6_type_err[] = {
736 "reserved0", "unreach", "packet_too_big", "timxceed", "paramprob",
737 NULL
738};
739
740static const char * const icmp6_type_info[] = {
741 "echo", "echoreply",
742 "mcastlistenq", "mcastlistenrep", "mcastlistendone",
743 "rtsol", "rtadv", "neighsol", "neighadv", "redirect",
744 "routerrenum", "nodeinfoq", "nodeinfor", "invneighsol", "invneighrep",
745 "mcastlistenrep2", "haad_req", "haad_rep",
746 "mobile_psol", "mobile_padv", "cga_sol", "cga_adv",
747 "experimental150", "mcast_rtadv", "mcast_rtsol", "mcast_rtterm",
748 "fmipv6_msg", "rpl_control", NULL
749};
750
751static const char * const icmp6_code_none[] = { "none", NULL };
752
753static const char * const icmp6_code_unreach[] = {
754 "noroute", "admin", "beyondscope", "addr", "port",
755 "srcaddr_policy", "reject_route", "source_route_err", NULL
756};
757
758static const char * const icmp6_code_timxceed[] = {
759 "intrans", "reass", NULL
760};
761
762static const char * const icmp6_code_paramprob[] = {
763 "hdr_field", "nxthdr_type", "option", NULL
764};
765
766/* not all informational icmps that have codes have a names array */
767#endif
768
769#endif /* !_NETINET_ICMP6_H_ */