master
1/* $NetBSD: icmp6.h,v 1.59 2022/08/29 09:14:02 knakahara 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};
81
82#define icmp6_data32 icmp6_dataun.icmp6_un_data32
83#define icmp6_data16 icmp6_dataun.icmp6_un_data16
84#define icmp6_data8 icmp6_dataun.icmp6_un_data8
85#define icmp6_pptr icmp6_data32[0] /* parameter prob */
86#define icmp6_mtu icmp6_data32[0] /* packet too big */
87#define icmp6_id icmp6_data16[0] /* echo request/reply */
88#define icmp6_seq icmp6_data16[1] /* echo request/reply */
89#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
90
91#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
92#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
93#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
94#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
95
96#define ICMP6_ECHO_REQUEST 128 /* echo service */
97#define ICMP6_ECHO_REPLY 129 /* echo reply */
98#define MLD_LISTENER_QUERY 130 /* multicast listener query */
99#define MLD_LISTENER_REPORT 131 /* multicast listener report */
100#define MLD_LISTENER_DONE 132 /* multicast listener done */
101#define MLD_LISTENER_REDUCTION MLD_LISTENER_DONE /* RFC3542 definition */
102
103/* RFC2292 decls */
104#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
105#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
106#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
107
108#ifndef _KERNEL
109/* the followings are for backward compatibility to old KAME apps. */
110#define MLD6_LISTENER_QUERY MLD_LISTENER_QUERY
111#define MLD6_LISTENER_REPORT MLD_LISTENER_REPORT
112#define MLD6_LISTENER_DONE MLD_LISTENER_DONE
113#endif
114
115#define ND_ROUTER_SOLICIT 133 /* router solicitation */
116#define ND_ROUTER_ADVERT 134 /* router advertisement */
117#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
118#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
119#define ND_REDIRECT 137 /* redirect */
120
121#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
122
123#define ICMP6_WRUREQUEST 139 /* who are you request */
124#define ICMP6_WRUREPLY 140 /* who are you reply */
125#define ICMP6_FQDN_QUERY 139 /* FQDN query */
126#define ICMP6_FQDN_REPLY 140 /* FQDN reply */
127#define ICMP6_NI_QUERY 139 /* node information request */
128#define ICMP6_NI_REPLY 140 /* node information reply */
129#define MLDV2_LISTENER_REPORT 143 /* RFC3810 listener report */
130
131/* The definitions below are experimental. TBA */
132#define MLD_MTRACE_RESP 200 /* mtrace response(to sender) */
133#define MLD_MTRACE 201 /* mtrace messages */
134
135#ifndef _KERNEL
136/* the followings are for backward compatibility to old KAME apps. */
137#define MLD6_MTRACE_RESP MLD_MTRACE_RESP
138#define MLD6_MTRACE MLD_MTRACE
139#endif
140
141#define ICMP6_MAXTYPE 201
142
143#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
144#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
145#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
146#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
147#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
148#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
149#define ICMP6_DST_UNREACH_POLICY 5 /* source address failed ingress/egress policy */
150#define ICMP6_DST_UNREACH_REJROUTE 6 /* reject route to destination */
151#define ICMP6_DST_UNREACH_SOURCERT 7 /* error in source routing header */
152
153#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
154#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
155
156#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
157#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
158#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
159#define ICMP6_PARAMPROB_FRAGMENT 3 /* incomplete chain in frag */
160
161#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
162
163#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
164#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
165#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
166
167#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
168#define ICMP6_NI_REFUSED 1 /* node information request is refused */
169#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
170
171#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
172#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
173#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
174
175/* Used in kernel only */
176#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
177#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
178
179/*
180 * Multicast Listener Discovery
181 */
182struct mld_hdr {
183 struct icmp6_hdr mld_icmp6_hdr;
184 struct in6_addr mld_addr; /* multicast address */
185};
186
187/* definitions to provide backward compatibility to old KAME applications */
188#ifndef _KERNEL
189#define mld6_hdr mld_hdr
190#define mld6_type mld_type
191#define mld6_code mld_code
192#define mld6_cksum mld_cksum
193#define mld6_maxdelay mld_maxdelay
194#define mld6_reserved mld_reserved
195#define mld6_addr mld_addr
196#endif
197
198/* shortcut macro definitions */
199#define mld_type mld_icmp6_hdr.icmp6_type
200#define mld_code mld_icmp6_hdr.icmp6_code
201#define mld_cksum mld_icmp6_hdr.icmp6_cksum
202#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
203#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
204
205#define MLD_MINLEN 24
206
207/*
208 * Neighbor Discovery
209 */
210
211struct nd_router_solicit { /* router solicitation */
212 struct icmp6_hdr nd_rs_hdr;
213 /* could be followed by options */
214};
215
216#define nd_rs_type nd_rs_hdr.icmp6_type
217#define nd_rs_code nd_rs_hdr.icmp6_code
218#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
219#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
220
221struct nd_router_advert { /* router advertisement */
222 struct icmp6_hdr nd_ra_hdr;
223 u_int32_t nd_ra_reachable; /* reachable time */
224 u_int32_t nd_ra_retransmit; /* retransmit timer */
225 /* could be followed by options */
226};
227
228#define nd_ra_type nd_ra_hdr.icmp6_type
229#define nd_ra_code nd_ra_hdr.icmp6_code
230#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
231#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
232#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
233#define ND_RA_FLAG_MANAGED 0x80
234#define ND_RA_FLAG_OTHER 0x40
235#define ND_RA_FLAG_HOME_AGENT 0x20
236#define ND_RA_FLAG_PROXY 0x04
237
238/*
239 * Router preference values based on RFC4191.
240 */
241#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
242
243#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
244#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
245#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
246#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
247
248#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
249
250struct nd_neighbor_solicit { /* neighbor solicitation */
251 struct icmp6_hdr nd_ns_hdr;
252 struct in6_addr nd_ns_target; /*target address */
253 /* could be followed by options */
254};
255
256#define nd_ns_type nd_ns_hdr.icmp6_type
257#define nd_ns_code nd_ns_hdr.icmp6_code
258#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
259#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
260
261struct nd_neighbor_advert { /* neighbor advertisement */
262 struct icmp6_hdr nd_na_hdr;
263 struct in6_addr nd_na_target; /* target address */
264 /* could be followed by options */
265};
266
267#define nd_na_type nd_na_hdr.icmp6_type
268#define nd_na_code nd_na_hdr.icmp6_code
269#define nd_na_cksum nd_na_hdr.icmp6_cksum
270#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
271#if BYTE_ORDER == BIG_ENDIAN
272#define ND_NA_FLAG_ROUTER 0x80000000
273#define ND_NA_FLAG_SOLICITED 0x40000000
274#define ND_NA_FLAG_OVERRIDE 0x20000000
275#else
276#if BYTE_ORDER == LITTLE_ENDIAN
277#define ND_NA_FLAG_ROUTER 0x80
278#define ND_NA_FLAG_SOLICITED 0x40
279#define ND_NA_FLAG_OVERRIDE 0x20
280#endif
281#endif
282
283struct nd_redirect { /* redirect */
284 struct icmp6_hdr nd_rd_hdr;
285 struct in6_addr nd_rd_target; /* target address */
286 struct in6_addr nd_rd_dst; /* destination address */
287 /* could be followed by options */
288};
289
290#define nd_rd_type nd_rd_hdr.icmp6_type
291#define nd_rd_code nd_rd_hdr.icmp6_code
292#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
293#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
294
295struct nd_opt_hdr { /* Neighbor discovery option header */
296 u_int8_t nd_opt_type;
297 u_int8_t nd_opt_len;
298 /* followed by option specific data*/
299};
300
301#define ND_OPT_SOURCE_LINKADDR 1
302#define ND_OPT_TARGET_LINKADDR 2
303#define ND_OPT_PREFIX_INFORMATION 3
304#define ND_OPT_REDIRECTED_HEADER 4
305#define ND_OPT_MTU 5
306#define ND_OPT_ADVINTERVAL 7
307#define ND_OPT_HOMEAGENT_INFO 8
308#define ND_OPT_SOURCE_ADDRLIST 9
309#define ND_OPT_TARGET_ADDRLIST 10
310#define ND_OPT_NONCE 14 /* RFC 3971 */
311#define ND_OPT_MAP 23 /* RFC 5380 */
312#define ND_OPT_ROUTE_INFO 24 /* RFC 4191 */
313#define ND_OPT_RDNSS 25 /* RFC 6016 */
314#define ND_OPT_DNSSL 31 /* RFC 6016 */
315#define ND_OPT_MAX 31
316
317struct nd_opt_route_info { /* route info */
318 u_int8_t nd_opt_rti_type;
319 u_int8_t nd_opt_rti_len;
320 u_int8_t nd_opt_rti_prefixlen;
321 u_int8_t nd_opt_rti_flags;
322 u_int32_t nd_opt_rti_lifetime;
323 /* prefix follows */
324};
325
326struct nd_opt_prefix_info { /* prefix information */
327 u_int8_t nd_opt_pi_type;
328 u_int8_t nd_opt_pi_len;
329 u_int8_t nd_opt_pi_prefix_len;
330 u_int8_t nd_opt_pi_flags_reserved;
331 u_int32_t nd_opt_pi_valid_time;
332 u_int32_t nd_opt_pi_preferred_time;
333 u_int32_t nd_opt_pi_reserved2;
334 struct in6_addr nd_opt_pi_prefix;
335};
336
337#define ND_OPT_PI_FLAG_ONLINK 0x80
338#define ND_OPT_PI_FLAG_AUTO 0x40
339#define ND_OPT_PI_FLAG_ROUTER 0x20
340
341struct nd_opt_rd_hdr { /* redirected header */
342 u_int8_t nd_opt_rh_type;
343 u_int8_t nd_opt_rh_len;
344 u_int16_t nd_opt_rh_reserved1;
345 u_int32_t nd_opt_rh_reserved2;
346 /* followed by IP header and data */
347};
348
349struct nd_opt_mtu { /* MTU option */
350 u_int8_t nd_opt_mtu_type;
351 u_int8_t nd_opt_mtu_len;
352 u_int16_t nd_opt_mtu_reserved;
353 u_int32_t nd_opt_mtu_mtu;
354};
355
356#define ND_OPT_NONCE_LEN ((1 * 8) - 2)
357#if ((ND_OPT_NONCE_LEN + 2) % 8) != 0
358#error "(ND_OPT_NONCE_LEN + 2) must be a multiple of 8."
359#endif
360struct nd_opt_nonce {
361 u_int8_t nd_opt_nonce_type;
362 u_int8_t nd_opt_nonce_len;
363 u_int8_t nd_opt_nonce[ND_OPT_NONCE_LEN];
364};
365
366struct nd_opt_rdnss { /* RDNSS option RFC 6106 */
367 u_int8_t nd_opt_rdnss_type;
368 u_int8_t nd_opt_rdnss_len;
369 u_int16_t nd_opt_rdnss_reserved;
370 u_int32_t nd_opt_rdnss_lifetime;
371 /* followed by list of IP prefixes */
372};
373
374struct nd_opt_dnssl { /* DNSSL option RFC 6106 */
375 u_int8_t nd_opt_dnssl_type;
376 u_int8_t nd_opt_dnssl_len;
377 u_int16_t nd_opt_dnssl_reserved;
378 u_int32_t nd_opt_dnssl_lifetime;
379 /* followed by list of IP prefixes */
380};
381
382/*
383 * icmp6 namelookup
384 */
385
386struct icmp6_namelookup {
387 struct icmp6_hdr icmp6_nl_hdr;
388 u_int8_t icmp6_nl_nonce[8];
389 int32_t icmp6_nl_ttl;
390#if 0
391 u_int8_t icmp6_nl_len;
392 u_int8_t icmp6_nl_name[3];
393#endif
394 /* could be followed by options */
395};
396
397/*
398 * icmp6 node information
399 */
400struct icmp6_nodeinfo {
401 struct icmp6_hdr icmp6_ni_hdr;
402 u_int8_t icmp6_ni_nonce[8];
403 /* could be followed by reply data */
404};
405
406#define ni_type icmp6_ni_hdr.icmp6_type
407#define ni_code icmp6_ni_hdr.icmp6_code
408#define ni_cksum icmp6_ni_hdr.icmp6_cksum
409#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
410#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
411
412#define NI_QTYPE_NOOP 0 /* NOOP */
413#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
414#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
415#define NI_QTYPE_DNSNAME 2 /* DNS Name */
416#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
417#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
418
419#if BYTE_ORDER == BIG_ENDIAN
420#define NI_SUPTYPE_FLAG_COMPRESS 0x1
421#define NI_FQDN_FLAG_VALIDTTL 0x1
422#elif BYTE_ORDER == LITTLE_ENDIAN
423#define NI_SUPTYPE_FLAG_COMPRESS 0x0100
424#define NI_FQDN_FLAG_VALIDTTL 0x0100
425#endif
426
427#ifdef NAME_LOOKUPS_04
428#if BYTE_ORDER == BIG_ENDIAN
429#define NI_NODEADDR_FLAG_LINKLOCAL 0x1
430#define NI_NODEADDR_FLAG_SITELOCAL 0x2
431#define NI_NODEADDR_FLAG_GLOBAL 0x4
432#define NI_NODEADDR_FLAG_ALL 0x8
433#define NI_NODEADDR_FLAG_TRUNCATE 0x10
434#define NI_NODEADDR_FLAG_ANYCAST 0x20 /* just experimental. not in spec */
435#elif BYTE_ORDER == LITTLE_ENDIAN
436#define NI_NODEADDR_FLAG_LINKLOCAL 0x0100
437#define NI_NODEADDR_FLAG_SITELOCAL 0x0200
438#define NI_NODEADDR_FLAG_GLOBAL 0x0400
439#define NI_NODEADDR_FLAG_ALL 0x0800
440#define NI_NODEADDR_FLAG_TRUNCATE 0x1000
441#define NI_NODEADDR_FLAG_ANYCAST 0x2000 /* just experimental. not in spec */
442#endif
443#else /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
444#if BYTE_ORDER == BIG_ENDIAN
445#define NI_NODEADDR_FLAG_TRUNCATE 0x1
446#define NI_NODEADDR_FLAG_ALL 0x2
447#define NI_NODEADDR_FLAG_COMPAT 0x4
448#define NI_NODEADDR_FLAG_LINKLOCAL 0x8
449#define NI_NODEADDR_FLAG_SITELOCAL 0x10
450#define NI_NODEADDR_FLAG_GLOBAL 0x20
451#define NI_NODEADDR_FLAG_ANYCAST 0x40 /* just experimental. not in spec */
452#elif BYTE_ORDER == LITTLE_ENDIAN
453#define NI_NODEADDR_FLAG_TRUNCATE 0x0100
454#define NI_NODEADDR_FLAG_ALL 0x0200
455#define NI_NODEADDR_FLAG_COMPAT 0x0400
456#define NI_NODEADDR_FLAG_LINKLOCAL 0x0800
457#define NI_NODEADDR_FLAG_SITELOCAL 0x1000
458#define NI_NODEADDR_FLAG_GLOBAL 0x2000
459#define NI_NODEADDR_FLAG_ANYCAST 0x4000 /* just experimental. not in spec */
460#endif
461#endif
462
463struct ni_reply_fqdn {
464 u_int32_t ni_fqdn_ttl; /* TTL */
465 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
466 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
467};
468
469/*
470 * Router Renumbering. as router-renum-08.txt
471 */
472struct icmp6_router_renum { /* router renumbering header */
473 struct icmp6_hdr rr_hdr;
474 u_int8_t rr_segnum;
475 u_int8_t rr_flags;
476 u_int16_t rr_maxdelay;
477 u_int32_t rr_reserved;
478};
479
480#define ICMP6_RR_FLAGS_TEST 0x80
481#define ICMP6_RR_FLAGS_REQRESULT 0x40
482#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
483#define ICMP6_RR_FLAGS_SPECSITE 0x10
484#define ICMP6_RR_FLAGS_PREVDONE 0x08
485
486#define rr_type rr_hdr.icmp6_type
487#define rr_code rr_hdr.icmp6_code
488#define rr_cksum rr_hdr.icmp6_cksum
489#define rr_seqnum rr_hdr.icmp6_data32[0]
490
491struct rr_pco_match { /* match prefix part */
492 u_int8_t rpm_code;
493 u_int8_t rpm_len;
494 u_int8_t rpm_ordinal;
495 u_int8_t rpm_matchlen;
496 u_int8_t rpm_minlen;
497 u_int8_t rpm_maxlen;
498 u_int16_t rpm_reserved;
499 struct in6_addr rpm_prefix;
500};
501
502#define RPM_PCO_ADD 1
503#define RPM_PCO_CHANGE 2
504#define RPM_PCO_SETGLOBAL 3
505#define RPM_PCO_MAX 4
506
507struct rr_pco_use { /* use prefix part */
508 u_int8_t rpu_uselen;
509 u_int8_t rpu_keeplen;
510 u_int8_t rpu_ramask;
511 u_int8_t rpu_raflags;
512 u_int32_t rpu_vltime;
513 u_int32_t rpu_pltime;
514 u_int32_t rpu_flags;
515 struct in6_addr rpu_prefix;
516};
517#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
518#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
519
520#if BYTE_ORDER == BIG_ENDIAN
521#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
522#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
523#elif BYTE_ORDER == LITTLE_ENDIAN
524#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
525#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
526#endif
527
528struct rr_result { /* router renumbering result message */
529 u_int16_t rrr_flags;
530 u_int8_t rrr_ordinal;
531 u_int8_t rrr_matchedlen;
532 u_int32_t rrr_ifid;
533 struct in6_addr rrr_prefix;
534};
535#if BYTE_ORDER == BIG_ENDIAN
536#define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
537#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
538#elif BYTE_ORDER == LITTLE_ENDIAN
539#define ICMP6_RR_RESULT_FLAGS_OOB 0x0200
540#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
541#endif
542
543/*
544 * icmp6 filter structures.
545 */
546
547struct icmp6_filter {
548 u_int32_t icmp6_filt[8];
549};
550
551#define ICMP6_FILTER_SETPASSALL(filterp) \
552 (void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
553#define ICMP6_FILTER_SETBLOCKALL(filterp) \
554 (void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
555#define ICMP6_FILTER_SETPASS(type, filterp) \
556 (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
557#define ICMP6_FILTER_SETBLOCK(type, filterp) \
558 (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
559#define ICMP6_FILTER_WILLPASS(type, filterp) \
560 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
561#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
562 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
563
564/*
565 * Variables related to this implementation
566 * of the internet control message protocol version 6.
567 */
568
569/*
570 * IPv6 ICMP statistics.
571 * Each counter is an unsigned 64-bit value.
572 */
573#define ICMP6_STAT_ERROR 0 /* # of calls to icmp6_error */
574#define ICMP6_STAT_CANTERROR 1 /* no error (old was icmp) */
575#define ICMP6_STAT_TOOFREQ 2 /* no error (rate limitation) */
576#define ICMP6_STAT_OUTHIST 3 /* # of output messages */
577 /* space for 256 counters */
578#define ICMP6_STAT_BADCODE 259 /* icmp6_code out of range */
579#define ICMP6_STAT_TOOSHORT 260 /* packet < sizeof(struct icmp6_hdr) */
580#define ICMP6_STAT_CHECKSUM 261 /* bad checksum */
581#define ICMP6_STAT_BADLEN 262 /* calculated bound mismatch */
582 /*
583 * number of responses; this member is inherited from the netinet code,
584 * but for netinet6 code, it is already available in outhist[].
585 */
586#define ICMP6_STAT_REFLECT 263
587#define ICMP6_STAT_INHIST 264 /* # of input messages */
588 /* space for 256 counters */
589#define ICMP6_STAT_ND_TOOMANYOPT 520 /* too many ND options */
590#define ICMP6_STAT_OUTERRHIST 521
591 /* space for 13 counters */
592#define ICMP6_STAT_PMTUCHG 534 /* path MTU changes */
593#define ICMP6_STAT_ND_BADOPT 535 /* bad ND options */
594#define ICMP6_STAT_BADNS 536 /* bad neighbor solicititation */
595#define ICMP6_STAT_BADNA 537 /* bad neighbor advertisement */
596#define ICMP6_STAT_BADRS 538 /* bad router solicitiation */
597#define ICMP6_STAT_BADRA 539 /* bad router advertisement */
598#define ICMP6_STAT_BADREDIRECT 540 /* bad redirect message */
599#define ICMP6_STAT_DROPPED_RAROUTE 541 /* discarded routes from router advertisement */
600
601#define ICMP6_NSTATS 542
602
603#define ICMP6_ERRSTAT_DST_UNREACH_NOROUTE 0
604#define ICMP6_ERRSTAT_DST_UNREACH_ADMIN 1
605#define ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE 2
606#define ICMP6_ERRSTAT_DST_UNREACH_ADDR 3
607#define ICMP6_ERRSTAT_DST_UNREACH_NOPORT 4
608#define ICMP6_ERRSTAT_PACKET_TOO_BIG 5
609#define ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT 6
610#define ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY 7
611#define ICMP6_ERRSTAT_PARAMPROB_HEADER 8
612#define ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER 9
613#define ICMP6_ERRSTAT_PARAMPROB_OPTION 10
614#define ICMP6_ERRSTAT_REDIRECT 11
615#define ICMP6_ERRSTAT_UNKNOWN 12
616
617/*
618 * Names for ICMP sysctl objects
619 */
620#define ICMPV6CTL_STATS 1
621#define ICMPV6CTL_REDIRACCEPT 2 /* accept/process redirects */
622#define ICMPV6CTL_REDIRTIMEOUT 3 /* redirect cache time */
623#if 0 /*obsoleted*/
624#define ICMPV6CTL_ERRRATELIMIT 5 /* ICMPv6 error rate limitation */
625#endif
626#define ICMPV6CTL_ND6_PRUNE 6
627#define ICMPV6CTL_ND6_DELAY 8
628#define ICMPV6CTL_ND6_UMAXTRIES 9
629#define ICMPV6CTL_ND6_MMAXTRIES 10
630#define ICMPV6CTL_ND6_USELOOPBACK 11
631/*#define ICMPV6CTL_ND6_PROXYALL 12 obsoleted, do not reuse here */
632#define ICMPV6CTL_NODEINFO 13
633#define ICMPV6CTL_ERRPPSLIMIT 14 /* ICMPv6 error pps limitation */
634#define ICMPV6CTL_ND6_MAXNUDHINT 15
635#define ICMPV6CTL_MTUDISC_HIWAT 16
636#define ICMPV6CTL_MTUDISC_LOWAT 17
637#define ICMPV6CTL_ND6_DEBUG 18
638#ifdef _KERNEL
639#define OICMPV6CTL_ND6_DRLIST 19
640#define OICMPV6CTL_ND6_PRLIST 20
641#endif
642#define ICMPV6CTL_ND6_MAXQLEN 24
643#define ICMPV6CTL_REFLECT_PMTU 25
644#define ICMPV6CTL_DYNAMIC_RT_MSG 26
645
646#ifdef _KERNEL
647struct rtentry;
648
649void icmp6_init(void);
650void icmp6_paramerror(struct mbuf *, int);
651void icmp6_error(struct mbuf *, int, int, int);
652void icmp6_error2(struct mbuf *, int, int, int, struct ifnet *,
653 struct in6_addr *);
654int icmp6_input(struct mbuf **, int *, int);
655void icmp6_fasttimo(void);
656void icmp6_prepare(struct mbuf *);
657void icmp6_redirect_output(struct mbuf *, struct rtentry *);
658int icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
659
660void icmp6_statinc(u_int);
661
662struct ip6ctlparam;
663void icmp6_mtudisc_update(struct ip6ctlparam *, int);
664void icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
665
666/* XXX: is this the right place for these macros? */
667#define icmp6_ifstat_inc(ifp, tag) \
668do { \
669 if (ifp) \
670 ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
671} while (/*CONSTCOND*/ 0)
672
673#define icmp6_ifoutstat_inc(ifp, type, code) \
674do { \
675 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
676 switch(type) { \
677 case ICMP6_DST_UNREACH: \
678 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
679 if (code == ICMP6_DST_UNREACH_ADMIN) \
680 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
681 break; \
682 case ICMP6_PACKET_TOO_BIG: \
683 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
684 break; \
685 case ICMP6_TIME_EXCEEDED: \
686 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
687 break; \
688 case ICMP6_PARAM_PROB: \
689 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
690 break; \
691 case ICMP6_ECHO_REQUEST: \
692 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
693 break; \
694 case ICMP6_ECHO_REPLY: \
695 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
696 break; \
697 case MLD_LISTENER_QUERY: \
698 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
699 break; \
700 case MLD_LISTENER_REPORT: \
701 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
702 break; \
703 case MLD_LISTENER_DONE: \
704 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
705 break; \
706 case ND_ROUTER_SOLICIT: \
707 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
708 break; \
709 case ND_ROUTER_ADVERT: \
710 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
711 break; \
712 case ND_NEIGHBOR_SOLICIT: \
713 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
714 break; \
715 case ND_NEIGHBOR_ADVERT: \
716 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
717 break; \
718 case ND_REDIRECT: \
719 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
720 break; \
721 } \
722} while (/*CONSTCOND*/ 0)
723
724extern int icmp6_rediraccept; /* accept/process redirects */
725extern int icmp6_redirtimeout; /* cache time for redirect routes */
726#endif /* _KERNEL */
727
728#ifdef ICMP6_STRINGS
729/* Info: http://www.iana.org/assignments/icmpv6-parameters */
730
731static const char * const icmp6_type_err[] = {
732 "reserved0", "unreach", "packet_too_big", "timxceed", "paramprob",
733 NULL
734};
735
736static const char * const icmp6_type_info[] = {
737 "echo", "echoreply",
738 "mcastlistenq", "mcastlistenrep", "mcastlistendone",
739 "rtsol", "rtadv", "neighsol", "neighadv", "redirect",
740 "routerrenum", "nodeinfoq", "nodeinfor", "invneighsol", "invneighrep",
741 "mcastlistenrep2", "haad_req", "haad_rep",
742 "mobile_psol", "mobile_padv", "cga_sol", "cga_adv",
743 "experimental150", "mcast_rtadv", "mcast_rtsol", "mcast_rtterm",
744 "fmipv6_msg", "rpl_control", NULL
745};
746
747static const char * const icmp6_code_none[] = { "none", NULL };
748
749static const char * const icmp6_code_unreach[] = {
750 "noroute", "admin", "beyondscope", "addr", "port",
751 "srcaddr_policy", "reject_route", "source_route_err", NULL
752};
753
754static const char * const icmp6_code_timxceed[] = {
755 "intrans", "reass", NULL
756};
757
758static const char * const icmp6_code_paramprob[] = {
759 "hdr_field", "nxthdr_type", "option", NULL
760};
761
762/* not all informational icmps that have codes have a names array */
763#endif
764
765#endif /* !_NETINET_ICMP6_H_ */