1/* $OpenBSD: icmp6.h,v 1.57 2025/09/16 09:19:43 florian Exp $ */
2/* $KAME: icmp6.h,v 1.84 2003/04/23 10:26:51 itojun Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * Copyright (c) 1982, 1986, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
62 */
63
64#ifndef _NETINET_ICMP6_H_
65#define _NETINET_ICMP6_H_
66
67#define ICMPV6_PLD_MAXLEN 1232 /* IPV6_MMTU - sizeof(struct ip6_hdr)
68 - sizeof(struct icmp6_hdr) */
69
70struct icmp6_hdr {
71 u_int8_t icmp6_type; /* type field */
72 u_int8_t icmp6_code; /* code field */
73 u_int16_t icmp6_cksum; /* checksum field */
74 union {
75 u_int32_t icmp6_un_data32[1]; /* type-specific field */
76 u_int16_t icmp6_un_data16[2]; /* type-specific field */
77 u_int8_t icmp6_un_data8[4]; /* type-specific field */
78 } icmp6_dataun;
79} __packed;
80
81#define icmp6_data32 icmp6_dataun.icmp6_un_data32
82#define icmp6_data16 icmp6_dataun.icmp6_un_data16
83#define icmp6_data8 icmp6_dataun.icmp6_un_data8
84#define icmp6_pptr icmp6_data32[0] /* parameter prob */
85#define icmp6_mtu icmp6_data32[0] /* packet too big */
86#define icmp6_id icmp6_data16[0] /* echo request/reply */
87#define icmp6_seq icmp6_data16[1] /* echo request/reply */
88#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
89
90#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
91#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
92#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
93#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
94
95#define ICMP6_ECHO_REQUEST 128 /* echo service */
96#define ICMP6_ECHO_REPLY 129 /* echo reply */
97#define MLD_LISTENER_QUERY 130 /* multicast listener query */
98#define MLD_LISTENER_REPORT 131 /* multicast listener report */
99#define MLD_LISTENER_DONE 132 /* multicast listener done */
100
101/* RFC2292 decls */
102#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
103#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
104#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
105
106#define ND_ROUTER_SOLICIT 133 /* router solicitation */
107#define ND_ROUTER_ADVERT 134 /* router advertisement */
108#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
109#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
110#define ND_REDIRECT 137 /* redirect */
111
112#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
113
114#define ICMP6_WRUREQUEST 139 /* who are you request */
115#define ICMP6_WRUREPLY 140 /* who are you reply */
116#define ICMP6_FQDN_QUERY 139 /* FQDN query */
117#define ICMP6_FQDN_REPLY 140 /* FQDN reply */
118#define ICMP6_NI_QUERY 139 /* node information request */
119#define ICMP6_NI_REPLY 140 /* node information reply */
120#define MLDV2_LISTENER_REPORT 143 /* RFC3810 listener report */
121
122/* The definitions below are experimental. TBA */
123#define MLD_MTRACE_RESP 200 /* mtrace response(to sender) */
124#define MLD_MTRACE 201 /* mtrace messages */
125
126#define ICMP6_MAXTYPE 201
127
128#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
129#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
130#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
131#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
132#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
133
134#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
135#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
136
137#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
138#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
139#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
140
141#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
142
143#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
144#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
145#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
146
147#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
148#define ICMP6_NI_REFUSED 1 /* node information request is refused */
149#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
150
151#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
152#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
153#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
154
155/* Used in kernel only */
156#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
157#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
158
159/*
160 * Multicast Listener Discovery
161 */
162struct mld_hdr {
163 struct icmp6_hdr mld_icmp6_hdr;
164 struct in6_addr mld_addr; /* multicast address */
165} __packed;
166
167/* shortcut macro definitions */
168#define mld_type mld_icmp6_hdr.icmp6_type
169#define mld_code mld_icmp6_hdr.icmp6_code
170#define mld_cksum mld_icmp6_hdr.icmp6_cksum
171#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
172#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
173
174/*
175 * Neighbor Discovery
176 */
177
178struct nd_router_solicit { /* router solicitation */
179 struct icmp6_hdr nd_rs_hdr;
180 /* could be followed by options */
181} __packed;
182
183#define nd_rs_type nd_rs_hdr.icmp6_type
184#define nd_rs_code nd_rs_hdr.icmp6_code
185#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
186#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
187
188struct nd_router_advert { /* router advertisement */
189 struct icmp6_hdr nd_ra_hdr;
190 u_int32_t nd_ra_reachable; /* reachable time */
191 u_int32_t nd_ra_retransmit; /* retransmit timer */
192 /* could be followed by options */
193} __packed;
194
195#define nd_ra_type nd_ra_hdr.icmp6_type
196#define nd_ra_code nd_ra_hdr.icmp6_code
197#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
198#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
199#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
200#define ND_RA_FLAG_MANAGED 0x80
201#define ND_RA_FLAG_OTHER 0x40
202
203#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
204
205#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
206#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
207#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
208#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
209
210#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
211
212struct nd_neighbor_solicit { /* neighbor solicitation */
213 struct icmp6_hdr nd_ns_hdr;
214 struct in6_addr nd_ns_target; /*target address */
215 /* could be followed by options */
216} __packed;
217
218#define nd_ns_type nd_ns_hdr.icmp6_type
219#define nd_ns_code nd_ns_hdr.icmp6_code
220#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
221#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
222
223struct nd_neighbor_advert { /* neighbor advertisement */
224 struct icmp6_hdr nd_na_hdr;
225 struct in6_addr nd_na_target; /* target address */
226 /* could be followed by options */
227} __packed;
228
229#define nd_na_type nd_na_hdr.icmp6_type
230#define nd_na_code nd_na_hdr.icmp6_code
231#define nd_na_cksum nd_na_hdr.icmp6_cksum
232#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
233#define ND_NA_FLAG_ROUTER htonl(0x80000000)
234#define ND_NA_FLAG_SOLICITED htonl(0x40000000)
235#define ND_NA_FLAG_OVERRIDE htonl(0x20000000)
236
237struct nd_redirect { /* redirect */
238 struct icmp6_hdr nd_rd_hdr;
239 struct in6_addr nd_rd_target; /* target address */
240 struct in6_addr nd_rd_dst; /* destination address */
241 /* could be followed by options */
242} __packed;
243
244#define nd_rd_type nd_rd_hdr.icmp6_type
245#define nd_rd_code nd_rd_hdr.icmp6_code
246#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
247#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
248
249struct nd_opt_hdr { /* Neighbor discovery option header */
250 u_int8_t nd_opt_type;
251 u_int8_t nd_opt_len;
252 /* followed by option specific data*/
253} __packed;
254
255#define ND_OPT_SOURCE_LINKADDR 1
256#define ND_OPT_TARGET_LINKADDR 2
257#define ND_OPT_PREFIX_INFORMATION 3
258#define ND_OPT_REDIRECTED_HEADER 4
259#define ND_OPT_MTU 5
260#define ND_OPT_ROUTE_INFO 24
261#define ND_OPT_RDNSS 25
262#define ND_OPT_DNSSL 31
263
264struct nd_opt_prefix_info { /* prefix information */
265 u_int8_t nd_opt_pi_type;
266 u_int8_t nd_opt_pi_len;
267 u_int8_t nd_opt_pi_prefix_len;
268 u_int8_t nd_opt_pi_flags_reserved;
269 u_int32_t nd_opt_pi_valid_time;
270 u_int32_t nd_opt_pi_preferred_time;
271 u_int32_t nd_opt_pi_reserved2;
272 struct in6_addr nd_opt_pi_prefix;
273} __packed;
274
275#define ND_OPT_PI_FLAG_ONLINK 0x80
276#define ND_OPT_PI_FLAG_AUTO 0x40
277
278struct nd_opt_rd_hdr { /* redirected header */
279 u_int8_t nd_opt_rh_type;
280 u_int8_t nd_opt_rh_len;
281 u_int16_t nd_opt_rh_reserved1;
282 u_int32_t nd_opt_rh_reserved2;
283 /* followed by IP header and data */
284} __packed;
285
286struct nd_opt_mtu { /* MTU option */
287 u_int8_t nd_opt_mtu_type;
288 u_int8_t nd_opt_mtu_len;
289 u_int16_t nd_opt_mtu_reserved;
290 u_int32_t nd_opt_mtu_mtu;
291} __packed;
292
293struct nd_opt_route_info { /* route info */
294 u_int8_t nd_opt_rti_type;
295 u_int8_t nd_opt_rti_len;
296 u_int8_t nd_opt_rti_prefixlen;
297 u_int8_t nd_opt_rti_flags;
298 u_int32_t nd_opt_rti_lifetime;
299} __packed;
300
301struct nd_opt_rdnss { /* RDNSS option */
302 u_int8_t nd_opt_rdnss_type;
303 u_int8_t nd_opt_rdnss_len;
304 u_int16_t nd_opt_rdnss_reserved;
305 u_int32_t nd_opt_rdnss_lifetime;
306 /* followed by list of recursive DNS servers */
307} __packed;
308
309struct nd_opt_dnssl { /* DNSSL option */
310 u_int8_t nd_opt_dnssl_type;
311 u_int8_t nd_opt_dnssl_len;
312 u_int16_t nd_opt_dnssl_reserved;
313 u_int32_t nd_opt_dnssl_lifetime;
314 /* followed by list of DNS search domains */
315} __packed;
316
317/*
318 * icmp6 namelookup
319 */
320struct icmp6_namelookup {
321 struct icmp6_hdr icmp6_nl_hdr;
322 u_int8_t icmp6_nl_nonce[8];
323 int32_t icmp6_nl_ttl;
324#if 0
325 u_int8_t icmp6_nl_len;
326 u_int8_t icmp6_nl_name[3];
327#endif
328 /* could be followed by options */
329} __packed;
330
331/*
332 * icmp6 node information
333 */
334struct icmp6_nodeinfo {
335 struct icmp6_hdr icmp6_ni_hdr;
336 u_int8_t icmp6_ni_nonce[8];
337 /* could be followed by reply data */
338} __packed;
339
340#define ni_type icmp6_ni_hdr.icmp6_type
341#define ni_code icmp6_ni_hdr.icmp6_code
342#define ni_cksum icmp6_ni_hdr.icmp6_cksum
343#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
344#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
345
346#define NI_QTYPE_NOOP 0 /* NOOP */
347#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
348#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
349#define NI_QTYPE_DNSNAME 2 /* DNS Name */
350#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
351#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
352
353#define NI_SUPTYPE_FLAG_COMPRESS htons(0x0001)
354#define NI_FQDN_FLAG_VALIDTTL htons(0x0001)
355
356#define NI_NODEADDR_FLAG_TRUNCATE htons(0x0001)
357#define NI_NODEADDR_FLAG_ALL htons(0x0002)
358#define NI_NODEADDR_FLAG_COMPAT htons(0x0004)
359#define NI_NODEADDR_FLAG_LINKLOCAL htons(0x0008)
360#define NI_NODEADDR_FLAG_SITELOCAL htons(0x0010)
361#define NI_NODEADDR_FLAG_GLOBAL htons(0x0020)
362#define NI_NODEADDR_FLAG_ANYCAST htons(0x0040) /* not in spec */
363
364struct ni_reply_fqdn {
365 u_int32_t ni_fqdn_ttl; /* TTL */
366 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
367 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
368} __packed;
369
370/*
371 * Router Renumbering. as router-renum-08.txt
372 */
373struct icmp6_router_renum { /* router renumbering header */
374 struct icmp6_hdr rr_hdr;
375 u_int8_t rr_segnum;
376 u_int8_t rr_flags;
377 u_int16_t rr_maxdelay;
378 u_int32_t rr_reserved;
379} __packed;
380
381#define ICMP6_RR_FLAGS_TEST 0x80
382#define ICMP6_RR_FLAGS_REQRESULT 0x40
383#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
384#define ICMP6_RR_FLAGS_SPECSITE 0x10
385#define ICMP6_RR_FLAGS_PREVDONE 0x08
386
387#define rr_type rr_hdr.icmp6_type
388#define rr_code rr_hdr.icmp6_code
389#define rr_cksum rr_hdr.icmp6_cksum
390#define rr_seqnum rr_hdr.icmp6_data32[0]
391
392struct rr_pco_match { /* match prefix part */
393 u_int8_t rpm_code;
394 u_int8_t rpm_len;
395 u_int8_t rpm_ordinal;
396 u_int8_t rpm_matchlen;
397 u_int8_t rpm_minlen;
398 u_int8_t rpm_maxlen;
399 u_int16_t rpm_reserved;
400 struct in6_addr rpm_prefix;
401} __packed;
402
403#define RPM_PCO_ADD 1
404#define RPM_PCO_CHANGE 2
405#define RPM_PCO_SETGLOBAL 3
406#define RPM_PCO_MAX 4
407
408struct rr_pco_use { /* use prefix part */
409 u_int8_t rpu_uselen;
410 u_int8_t rpu_keeplen;
411 u_int8_t rpu_ramask;
412 u_int8_t rpu_raflags;
413 u_int32_t rpu_vltime;
414 u_int32_t rpu_pltime;
415 u_int32_t rpu_flags;
416 struct in6_addr rpu_prefix;
417} __packed;
418#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
419#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
420
421#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME htonl(0x80000000)
422#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME htonl(0x40000000)
423
424struct rr_result { /* router renumbering result message */
425 u_int16_t rrr_flags;
426 u_int8_t rrr_ordinal;
427 u_int8_t rrr_matchedlen;
428 u_int32_t rrr_ifid;
429 struct in6_addr rrr_prefix;
430} __packed;
431#define ICMP6_RR_RESULT_FLAGS_OOB htons(0x0002)
432#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN htons(0x0001)
433
434/*
435 * icmp6 filter structures.
436 */
437
438struct icmp6_filter {
439 u_int32_t icmp6_filt[8];
440};
441
442#define ICMP6_FILTER_SETPASSALL(filterp) \
443 memset(filterp, 0xff, sizeof(struct icmp6_filter))
444#define ICMP6_FILTER_SETBLOCKALL(filterp) \
445 memset(filterp, 0x00, sizeof(struct icmp6_filter))
446#define ICMP6_FILTER_SETPASS(type, filterp) \
447 (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
448#define ICMP6_FILTER_SETBLOCK(type, filterp) \
449 (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
450#define ICMP6_FILTER_WILLPASS(type, filterp) \
451 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
452#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
453 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
454
455/*
456 * Variables related to this implementation
457 * of the internet control message protocol version 6.
458 */
459struct icmp6stat {
460/* statistics related to icmp6 packets generated */
461 u_int64_t icp6s_error; /* # of calls to icmp6_error */
462 u_int64_t icp6s_canterror; /* no error because old was icmp */
463 u_int64_t icp6s_toofreq; /* no error because rate limitation */
464 u_int64_t icp6s_outhist[256];
465/* statistics related to input message processed */
466 u_int64_t icp6s_badcode; /* icmp6_code out of range */
467 u_int64_t icp6s_tooshort; /* packet < sizeof(struct icmp6_hdr) */
468 u_int64_t icp6s_checksum; /* bad checksum */
469 u_int64_t icp6s_badlen; /* calculated bound mismatch */
470 /*
471 * number of responses: this member is inherited from netinet code, but
472 * for netinet6 code, it is already available in icp6s_outhist[].
473 */
474 u_int64_t icp6s_reflect;
475 u_int64_t icp6s_inhist[256];
476 u_int64_t icp6s_nd_toomanyopt; /* too many ND options */
477 u_int64_t icp6s_odst_unreach_noroute;
478 u_int64_t icp6s_odst_unreach_admin;
479 u_int64_t icp6s_odst_unreach_beyondscope;
480 u_int64_t icp6s_odst_unreach_addr;
481 u_int64_t icp6s_odst_unreach_noport;
482 u_int64_t icp6s_opacket_too_big;
483 u_int64_t icp6s_otime_exceed_transit;
484 u_int64_t icp6s_otime_exceed_reassembly;
485 u_int64_t icp6s_oparamprob_header;
486 u_int64_t icp6s_oparamprob_nextheader;
487 u_int64_t icp6s_oparamprob_option;
488 u_int64_t icp6s_oredirect; /* we regard redirect as an error here */
489 u_int64_t icp6s_ounknown;
490 u_int64_t icp6s_pmtuchg; /* path MTU changes */
491 u_int64_t icp6s_nd_badopt; /* bad ND options */
492 u_int64_t icp6s_badns; /* bad neighbor solicitation */
493 u_int64_t icp6s_badna; /* bad neighbor advertisement */
494 u_int64_t icp6s_badrs; /* bad router advertisement */
495 u_int64_t icp6s_badra; /* bad router advertisement */
496 u_int64_t icp6s_badredirect; /* bad redirect message */
497};
498
499/*
500 * Names for ICMP sysctl objects
501 */
502#define ICMPV6CTL_STATS 1
503#define ICMPV6CTL_REDIRACCEPT 2 /* accept/process redirects */
504#define ICMPV6CTL_REDIRTIMEOUT 3 /* redirect cache time */
505#define ICMPV6CTL_ND6_DELAY 8
506#define ICMPV6CTL_ND6_UMAXTRIES 9
507#define ICMPV6CTL_ND6_MMAXTRIES 10
508#define ICMPV6CTL_ND6_QUEUED 11
509#define ICMPV6CTL_NODEINFO 13
510#define ICMPV6CTL_ERRPPSLIMIT 14 /* ICMPv6 error pps limitation */
511#define ICMPV6CTL_MTUDISC_HIWAT 16
512#define ICMPV6CTL_MTUDISC_LOWAT 17
513#define ICMPV6CTL_MAXID 18
514
515#define ICMPV6CTL_NAMES { \
516 { 0, 0 }, \
517 { 0, 0 }, \
518 { 0, 0 }, \
519 { "redirtimeout", CTLTYPE_INT }, \
520 { 0, 0 }, \
521 { 0, 0 }, \
522 { 0, 0 }, \
523 { 0, 0 }, \
524 { "nd6_delay", CTLTYPE_INT }, \
525 { "nd6_umaxtries", CTLTYPE_INT }, \
526 { "nd6_mmaxtries", CTLTYPE_INT }, \
527 { "nd6_queued", CTLTYPE_INT }, \
528 { 0, 0 }, \
529 { 0, 0 }, \
530 { "errppslimit", CTLTYPE_INT }, \
531 { 0, 0 }, \
532 { "mtudisc_hiwat", CTLTYPE_INT }, \
533 { "mtudisc_lowat", CTLTYPE_INT }, \
534}
535
536#define RTF_PROBEMTU RTF_PROTO1
537
538#ifdef _KERNEL
539
540#include <sys/percpu.h>
541
542enum icmp6stat_counters {
543 icp6s_error,
544 icp6s_canterror,
545 icp6s_toofreq,
546 icp6s_outhist,
547 icp6s_badcode = icp6s_outhist + 256,
548 icp6s_tooshort,
549 icp6s_checksum,
550 icp6s_badlen,
551 icp6s_reflect,
552 icp6s_inhist,
553 icp6s_nd_toomanyopt = icp6s_inhist + 256,
554 icp6s_odst_unreach_noroute,
555 icp6s_odst_unreach_admin,
556 icp6s_odst_unreach_beyondscope,
557 icp6s_odst_unreach_addr,
558 icp6s_odst_unreach_noport,
559 icp6s_opacket_too_big,
560 icp6s_otime_exceed_transit,
561 icp6s_otime_exceed_reassembly,
562 icp6s_oparamprob_header,
563 icp6s_oparamprob_nextheader,
564 icp6s_oparamprob_option,
565 icp6s_oredirect,
566 icp6s_ounknown,
567 icp6s_pmtuchg,
568 icp6s_nd_badopt,
569 icp6s_badns,
570 icp6s_badna,
571 icp6s_badrs,
572 icp6s_badra,
573 icp6s_badredirect,
574 icp6s_ncounters,
575};
576
577extern struct cpumem *icmp6counters;
578
579static inline void
580icmp6stat_inc(enum icmp6stat_counters c)
581{
582 counters_inc(icmp6counters, c);
583}
584
585struct rtentry;
586struct rttimer;
587struct in6_multi;
588
589void icmp6_init(void);
590struct mbuf *icmp6_do_error(struct mbuf *, int, int, int);
591void icmp6_error(struct mbuf *, int, int, int);
592int icmp6_input(struct mbuf **, int *, int, int,
593 struct netstack *);
594void icmp6_fasttimo(void);
595int icmp6_reflect(struct mbuf **, size_t, struct sockaddr *);
596void icmp6_redirect_input(struct mbuf *, int);
597void icmp6_redirect_output(struct mbuf *, struct rtentry *);
598int icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
599struct rtentry *icmp6_mtudisc_clone(struct sockaddr_in6 *, u_int, int);
600
601struct ip6ctlparam;
602void icmp6_mtudisc_update(struct ip6ctlparam *, int);
603void icmp6_mtudisc_callback_register(void (*)(struct sockaddr_in6 *, u_int));
604
605extern int icmp6_redirtimeout; /* cache time for redirect routes */
606
607#endif /* _KERNEL */
608#endif /* _NETINET_ICMP6_H_ */