1/* $NetBSD: icmp6.h,v 1.47 2013/07/01 12:43:15 christos 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} __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 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
160#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
161
162#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
163#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
164#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
165
166#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
167#define ICMP6_NI_REFUSED 1 /* node information request is refused */
168#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
169
170#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
171#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
172#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
173
174/* Used in kernel only */
175#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
176#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
177
178/*
179 * Multicast Listener Discovery
180 */
181struct mld_hdr {
182 struct icmp6_hdr mld_icmp6_hdr;
183 struct in6_addr mld_addr; /* multicast address */
184} __packed;
185
186/* definitions to provide backward compatibility to old KAME applications */
187#ifndef _KERNEL
188#define mld6_hdr mld_hdr
189#define mld6_type mld_type
190#define mld6_code mld_code
191#define mld6_cksum mld_cksum
192#define mld6_maxdelay mld_maxdelay
193#define mld6_reserved mld_reserved
194#define mld6_addr mld_addr
195#endif
196
197/* shortcut macro definitions */
198#define mld_type mld_icmp6_hdr.icmp6_type
199#define mld_code mld_icmp6_hdr.icmp6_code
200#define mld_cksum mld_icmp6_hdr.icmp6_cksum
201#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
202#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
203
204#define MLD_MINLEN 24
205
206/*
207 * Neighbor Discovery
208 */
209
210struct nd_router_solicit { /* router solicitation */
211 struct icmp6_hdr nd_rs_hdr;
212 /* could be followed by options */
213} __packed;
214
215#define nd_rs_type nd_rs_hdr.icmp6_type
216#define nd_rs_code nd_rs_hdr.icmp6_code
217#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
218#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
219
220struct nd_router_advert { /* router advertisement */
221 struct icmp6_hdr nd_ra_hdr;
222 u_int32_t nd_ra_reachable; /* reachable time */
223 u_int32_t nd_ra_retransmit; /* retransmit timer */
224 /* could be followed by options */
225} __packed;
226
227#define nd_ra_type nd_ra_hdr.icmp6_type
228#define nd_ra_code nd_ra_hdr.icmp6_code
229#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
230#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
231#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
232#define ND_RA_FLAG_MANAGED 0x80
233#define ND_RA_FLAG_OTHER 0x40
234#define ND_RA_FLAG_HOME_AGENT 0x20
235
236/*
237 * Router preference values based on RFC4191.
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#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
247
248struct nd_neighbor_solicit { /* neighbor solicitation */
249 struct icmp6_hdr nd_ns_hdr;
250 struct in6_addr nd_ns_target; /*target address */
251 /* could be followed by options */
252} __packed;
253
254#define nd_ns_type nd_ns_hdr.icmp6_type
255#define nd_ns_code nd_ns_hdr.icmp6_code
256#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
257#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
258
259struct nd_neighbor_advert { /* neighbor advertisement */
260 struct icmp6_hdr nd_na_hdr;
261 struct in6_addr nd_na_target; /* target address */
262 /* could be followed by options */
263} __packed;
264
265#define nd_na_type nd_na_hdr.icmp6_type
266#define nd_na_code nd_na_hdr.icmp6_code
267#define nd_na_cksum nd_na_hdr.icmp6_cksum
268#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
269#if BYTE_ORDER == BIG_ENDIAN
270#define ND_NA_FLAG_ROUTER 0x80000000
271#define ND_NA_FLAG_SOLICITED 0x40000000
272#define ND_NA_FLAG_OVERRIDE 0x20000000
273#else
274#if BYTE_ORDER == LITTLE_ENDIAN
275#define ND_NA_FLAG_ROUTER 0x80
276#define ND_NA_FLAG_SOLICITED 0x40
277#define ND_NA_FLAG_OVERRIDE 0x20
278#endif
279#endif
280
281struct nd_redirect { /* redirect */
282 struct icmp6_hdr nd_rd_hdr;
283 struct in6_addr nd_rd_target; /* target address */
284 struct in6_addr nd_rd_dst; /* destination address */
285 /* could be followed by options */
286} __packed;
287
288#define nd_rd_type nd_rd_hdr.icmp6_type
289#define nd_rd_code nd_rd_hdr.icmp6_code
290#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
291#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
292
293struct nd_opt_hdr { /* Neighbor discovery option header */
294 u_int8_t nd_opt_type;
295 u_int8_t nd_opt_len;
296 /* followed by option specific data*/
297} __packed;
298
299#define ND_OPT_SOURCE_LINKADDR 1
300#define ND_OPT_TARGET_LINKADDR 2
301#define ND_OPT_PREFIX_INFORMATION 3
302#define ND_OPT_REDIRECTED_HEADER 4
303#define ND_OPT_MTU 5
304#define ND_OPT_ADVINTERVAL 7
305#define ND_OPT_HOMEAGENT_INFO 8
306#define ND_OPT_SOURCE_ADDRLIST 9
307#define ND_OPT_TARGET_ADDRLIST 10
308#define ND_OPT_MAP 23 /* RFC 5380 */
309#define ND_OPT_ROUTE_INFO 24 /* RFC 4191 */
310#define ND_OPT_RDNSS 25 /* RFC 6016 */
311#define ND_OPT_DNSSL 31 /* RFC 6016 */
312
313struct nd_opt_route_info { /* route info */
314 u_int8_t nd_opt_rti_type;
315 u_int8_t nd_opt_rti_len;
316 u_int8_t nd_opt_rti_prefixlen;
317 u_int8_t nd_opt_rti_flags;
318 u_int32_t nd_opt_rti_lifetime;
319 /* prefix follows */
320};
321
322struct nd_opt_prefix_info { /* prefix information */
323 u_int8_t nd_opt_pi_type;
324 u_int8_t nd_opt_pi_len;
325 u_int8_t nd_opt_pi_prefix_len;
326 u_int8_t nd_opt_pi_flags_reserved;
327 u_int32_t nd_opt_pi_valid_time;
328 u_int32_t nd_opt_pi_preferred_time;
329 u_int32_t nd_opt_pi_reserved2;
330 struct in6_addr nd_opt_pi_prefix;
331} __packed;
332
333#define ND_OPT_PI_FLAG_ONLINK 0x80
334#define ND_OPT_PI_FLAG_AUTO 0x40
335
336struct nd_opt_rd_hdr { /* redirected header */
337 u_int8_t nd_opt_rh_type;
338 u_int8_t nd_opt_rh_len;
339 u_int16_t nd_opt_rh_reserved1;
340 u_int32_t nd_opt_rh_reserved2;
341 /* followed by IP header and data */
342} __packed;
343
344struct nd_opt_mtu { /* MTU option */
345 u_int8_t nd_opt_mtu_type;
346 u_int8_t nd_opt_mtu_len;
347 u_int16_t nd_opt_mtu_reserved;
348 u_int32_t nd_opt_mtu_mtu;
349} __packed;
350
351struct nd_opt_rdnss { /* RDNSS option RFC 6106 */
352 u_int8_t nd_opt_rdnss_type;
353 u_int8_t nd_opt_rdnss_len;
354 u_int16_t nd_opt_rdnss_reserved;
355 u_int32_t nd_opt_rdnss_lifetime;
356 /* followed by list of IP prefixes */
357} __packed;
358
359struct nd_opt_dnssl { /* DNSSL option RFC 6106 */
360 u_int8_t nd_opt_dnssl_type;
361 u_int8_t nd_opt_dnssl_len;
362 u_int16_t nd_opt_dnssl_reserved;
363 u_int32_t nd_opt_dnssl_lifetime;
364 /* followed by list of IP prefixes */
365} __packed;
366
367/*
368 * icmp6 namelookup
369 */
370
371struct icmp6_namelookup {
372 struct icmp6_hdr icmp6_nl_hdr;
373 u_int8_t icmp6_nl_nonce[8];
374 int32_t icmp6_nl_ttl;
375#if 0
376 u_int8_t icmp6_nl_len;
377 u_int8_t icmp6_nl_name[3];
378#endif
379 /* could be followed by options */
380} __packed;
381
382/*
383 * icmp6 node information
384 */
385struct icmp6_nodeinfo {
386 struct icmp6_hdr icmp6_ni_hdr;
387 u_int8_t icmp6_ni_nonce[8];
388 /* could be followed by reply data */
389} __packed;
390
391#define ni_type icmp6_ni_hdr.icmp6_type
392#define ni_code icmp6_ni_hdr.icmp6_code
393#define ni_cksum icmp6_ni_hdr.icmp6_cksum
394#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
395#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
396
397#define NI_QTYPE_NOOP 0 /* NOOP */
398#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
399#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
400#define NI_QTYPE_DNSNAME 2 /* DNS Name */
401#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
402#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
403
404#if BYTE_ORDER == BIG_ENDIAN
405#define NI_SUPTYPE_FLAG_COMPRESS 0x1
406#define NI_FQDN_FLAG_VALIDTTL 0x1
407#elif BYTE_ORDER == LITTLE_ENDIAN
408#define NI_SUPTYPE_FLAG_COMPRESS 0x0100
409#define NI_FQDN_FLAG_VALIDTTL 0x0100
410#endif
411
412#ifdef NAME_LOOKUPS_04
413#if BYTE_ORDER == BIG_ENDIAN
414#define NI_NODEADDR_FLAG_LINKLOCAL 0x1
415#define NI_NODEADDR_FLAG_SITELOCAL 0x2
416#define NI_NODEADDR_FLAG_GLOBAL 0x4
417#define NI_NODEADDR_FLAG_ALL 0x8
418#define NI_NODEADDR_FLAG_TRUNCATE 0x10
419#define NI_NODEADDR_FLAG_ANYCAST 0x20 /* just experimental. not in spec */
420#elif BYTE_ORDER == LITTLE_ENDIAN
421#define NI_NODEADDR_FLAG_LINKLOCAL 0x0100
422#define NI_NODEADDR_FLAG_SITELOCAL 0x0200
423#define NI_NODEADDR_FLAG_GLOBAL 0x0400
424#define NI_NODEADDR_FLAG_ALL 0x0800
425#define NI_NODEADDR_FLAG_TRUNCATE 0x1000
426#define NI_NODEADDR_FLAG_ANYCAST 0x2000 /* just experimental. not in spec */
427#endif
428#else /* draft-ietf-ipngwg-icmp-name-lookups-05 (and later?) */
429#if BYTE_ORDER == BIG_ENDIAN
430#define NI_NODEADDR_FLAG_TRUNCATE 0x1
431#define NI_NODEADDR_FLAG_ALL 0x2
432#define NI_NODEADDR_FLAG_COMPAT 0x4
433#define NI_NODEADDR_FLAG_LINKLOCAL 0x8
434#define NI_NODEADDR_FLAG_SITELOCAL 0x10
435#define NI_NODEADDR_FLAG_GLOBAL 0x20
436#define NI_NODEADDR_FLAG_ANYCAST 0x40 /* just experimental. not in spec */
437#elif BYTE_ORDER == LITTLE_ENDIAN
438#define NI_NODEADDR_FLAG_TRUNCATE 0x0100
439#define NI_NODEADDR_FLAG_ALL 0x0200
440#define NI_NODEADDR_FLAG_COMPAT 0x0400
441#define NI_NODEADDR_FLAG_LINKLOCAL 0x0800
442#define NI_NODEADDR_FLAG_SITELOCAL 0x1000
443#define NI_NODEADDR_FLAG_GLOBAL 0x2000
444#define NI_NODEADDR_FLAG_ANYCAST 0x4000 /* just experimental. not in spec */
445#endif
446#endif
447
448struct ni_reply_fqdn {
449 u_int32_t ni_fqdn_ttl; /* TTL */
450 u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
451 u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
452} __packed;
453
454/*
455 * Router Renumbering. as router-renum-08.txt
456 */
457struct icmp6_router_renum { /* router renumbering header */
458 struct icmp6_hdr rr_hdr;
459 u_int8_t rr_segnum;
460 u_int8_t rr_flags;
461 u_int16_t rr_maxdelay;
462 u_int32_t rr_reserved;
463} __packed;
464
465#define ICMP6_RR_FLAGS_TEST 0x80
466#define ICMP6_RR_FLAGS_REQRESULT 0x40
467#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
468#define ICMP6_RR_FLAGS_SPECSITE 0x10
469#define ICMP6_RR_FLAGS_PREVDONE 0x08
470
471#define rr_type rr_hdr.icmp6_type
472#define rr_code rr_hdr.icmp6_code
473#define rr_cksum rr_hdr.icmp6_cksum
474#define rr_seqnum rr_hdr.icmp6_data32[0]
475
476struct rr_pco_match { /* match prefix part */
477 u_int8_t rpm_code;
478 u_int8_t rpm_len;
479 u_int8_t rpm_ordinal;
480 u_int8_t rpm_matchlen;
481 u_int8_t rpm_minlen;
482 u_int8_t rpm_maxlen;
483 u_int16_t rpm_reserved;
484 struct in6_addr rpm_prefix;
485} __packed;
486
487#define RPM_PCO_ADD 1
488#define RPM_PCO_CHANGE 2
489#define RPM_PCO_SETGLOBAL 3
490#define RPM_PCO_MAX 4
491
492struct rr_pco_use { /* use prefix part */
493 u_int8_t rpu_uselen;
494 u_int8_t rpu_keeplen;
495 u_int8_t rpu_ramask;
496 u_int8_t rpu_raflags;
497 u_int32_t rpu_vltime;
498 u_int32_t rpu_pltime;
499 u_int32_t rpu_flags;
500 struct in6_addr rpu_prefix;
501} __packed;
502#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
503#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
504
505#if BYTE_ORDER == BIG_ENDIAN
506#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
507#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
508#elif BYTE_ORDER == LITTLE_ENDIAN
509#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
510#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
511#endif
512
513struct rr_result { /* router renumbering result message */
514 u_int16_t rrr_flags;
515 u_int8_t rrr_ordinal;
516 u_int8_t rrr_matchedlen;
517 u_int32_t rrr_ifid;
518 struct in6_addr rrr_prefix;
519} __packed;
520#if BYTE_ORDER == BIG_ENDIAN
521#define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
522#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
523#elif BYTE_ORDER == LITTLE_ENDIAN
524#define ICMP6_RR_RESULT_FLAGS_OOB 0x0200
525#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
526#endif
527
528/*
529 * icmp6 filter structures.
530 */
531
532struct icmp6_filter {
533 u_int32_t icmp6_filt[8];
534};
535
536#define ICMP6_FILTER_SETPASSALL(filterp) \
537 (void)memset(filterp, 0xff, sizeof(struct icmp6_filter))
538#define ICMP6_FILTER_SETBLOCKALL(filterp) \
539 (void)memset(filterp, 0x00, sizeof(struct icmp6_filter))
540#define ICMP6_FILTER_SETPASS(type, filterp) \
541 (((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31)))
542#define ICMP6_FILTER_SETBLOCK(type, filterp) \
543 (((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31)))
544#define ICMP6_FILTER_WILLPASS(type, filterp) \
545 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
546#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
547 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
548
549/*
550 * Variables related to this implementation
551 * of the internet control message protocol version 6.
552 */
553
554/*
555 * IPv6 ICMP statistics.
556 * Each counter is an unsigned 64-bit value.
557 */
558#define ICMP6_STAT_ERROR 0 /* # of calls to icmp6_error */
559#define ICMP6_STAT_CANTERROR 1 /* no error (old was icmp) */
560#define ICMP6_STAT_TOOFREQ 2 /* no error (rate limitation) */
561#define ICMP6_STAT_OUTHIST 3 /* # of output messages */
562 /* space for 256 counters */
563#define ICMP6_STAT_BADCODE 259 /* icmp6_code out of range */
564#define ICMP6_STAT_TOOSHORT 260 /* packet < sizeof(struct icmp6_hdr) */
565#define ICMP6_STAT_CHECKSUM 261 /* bad checksum */
566#define ICMP6_STAT_BADLEN 262 /* calculated bound mismatch */
567 /*
568 * number of responses; this member is inherited from the netinet code,
569 * but for netinet6 code, it is already available in outhist[].
570 */
571#define ICMP6_STAT_REFLECT 263
572#define ICMP6_STAT_INHIST 264 /* # of input messages */
573 /* space for 256 counters */
574#define ICMP6_STAT_ND_TOOMANYOPT 520 /* too many ND options */
575#define ICMP6_STAT_OUTERRHIST 521
576 /* space for 13 counters */
577#define ICMP6_STAT_PMTUCHG 534 /* path MTU changes */
578#define ICMP6_STAT_ND_BADOPT 535 /* bad ND options */
579#define ICMP6_STAT_BADNS 536 /* bad neighbor solicititation */
580#define ICMP6_STAT_BADNA 537 /* bad neighbor advertisement */
581#define ICMP6_STAT_BADRS 538 /* bad router solicitiation */
582#define ICMP6_STAT_BADRA 539 /* bad router advertisement */
583#define ICMP6_STAT_BADREDIRECT 540 /* bad redirect message */
584#define ICMP6_STAT_DROPPED_RAROUTE 541 /* discarded routes from router advertisement */
585
586#define ICMP6_NSTATS 542
587
588#define ICMP6_ERRSTAT_DST_UNREACH_NOROUTE 0
589#define ICMP6_ERRSTAT_DST_UNREACH_ADMIN 1
590#define ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE 2
591#define ICMP6_ERRSTAT_DST_UNREACH_ADDR 3
592#define ICMP6_ERRSTAT_DST_UNREACH_NOPORT 4
593#define ICMP6_ERRSTAT_PACKET_TOO_BIG 5
594#define ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT 6
595#define ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY 7
596#define ICMP6_ERRSTAT_PARAMPROB_HEADER 8
597#define ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER 9
598#define ICMP6_ERRSTAT_PARAMPROB_OPTION 10
599#define ICMP6_ERRSTAT_REDIRECT 11
600#define ICMP6_ERRSTAT_UNKNOWN 12
601
602/*
603 * Names for ICMP sysctl objects
604 */
605#define ICMPV6CTL_STATS 1
606#define ICMPV6CTL_REDIRACCEPT 2 /* accept/process redirects */
607#define ICMPV6CTL_REDIRTIMEOUT 3 /* redirect cache time */
608#if 0 /*obsoleted*/
609#define ICMPV6CTL_ERRRATELIMIT 5 /* ICMPv6 error rate limitation */
610#endif
611#define ICMPV6CTL_ND6_PRUNE 6
612#define ICMPV6CTL_ND6_DELAY 8
613#define ICMPV6CTL_ND6_UMAXTRIES 9
614#define ICMPV6CTL_ND6_MMAXTRIES 10
615#define ICMPV6CTL_ND6_USELOOPBACK 11
616/*#define ICMPV6CTL_ND6_PROXYALL 12 obsoleted, do not reuse here */
617#define ICMPV6CTL_NODEINFO 13
618#define ICMPV6CTL_ERRPPSLIMIT 14 /* ICMPv6 error pps limitation */
619#define ICMPV6CTL_ND6_MAXNUDHINT 15
620#define ICMPV6CTL_MTUDISC_HIWAT 16
621#define ICMPV6CTL_MTUDISC_LOWAT 17
622#define ICMPV6CTL_ND6_DEBUG 18
623#define ICMPV6CTL_ND6_DRLIST 19
624#define ICMPV6CTL_ND6_PRLIST 20
625#define ICMPV6CTL_ND6_MAXQLEN 24
626#define ICMPV6CTL_MAXID 25
627
628#define ICMPV6CTL_NAMES { \
629 { 0, 0 }, \
630 { 0, 0 }, \
631 { "rediraccept", CTLTYPE_INT }, \
632 { "redirtimeout", CTLTYPE_INT }, \
633 { 0, 0 }, \
634 { 0, 0 }, \
635 { "nd6_prune", CTLTYPE_INT }, \
636 { 0, 0 }, \
637 { "nd6_delay", CTLTYPE_INT }, \
638 { "nd6_umaxtries", CTLTYPE_INT }, \
639 { "nd6_mmaxtries", CTLTYPE_INT }, \
640 { "nd6_useloopback", CTLTYPE_INT }, \
641 { 0, 0 }, \
642 { "nodeinfo", CTLTYPE_INT }, \
643 { "errppslimit", CTLTYPE_INT }, \
644 { "nd6_maxnudhint", CTLTYPE_INT }, \
645 { "mtudisc_hiwat", CTLTYPE_INT }, \
646 { "mtudisc_lowat", CTLTYPE_INT }, \
647 { "nd6_debug", CTLTYPE_INT }, \
648 { 0, 0 }, \
649 { 0, 0 }, \
650 { 0, 0 }, \
651 { 0, 0 }, \
652 { 0, 0 }, \
653 { "nd6_maxqueuelen", CTLTYPE_INT }, \
654}
655
656#ifdef _KERNEL
657struct rtentry;
658struct rttimer;
659struct in6_multi;
660
661void icmp6_init(void);
662void icmp6_paramerror(struct mbuf *, int);
663void icmp6_error(struct mbuf *, int, int, int);
664void icmp6_error2(struct mbuf *, int, int, int, struct ifnet *);
665int icmp6_input(struct mbuf **, int *, int);
666void icmp6_fasttimo(void);
667void icmp6_reflect(struct mbuf *, size_t);
668void icmp6_prepare(struct mbuf *);
669void icmp6_redirect_input(struct mbuf *, int);
670void icmp6_redirect_output(struct mbuf *, struct rtentry *);
671int icmp6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
672
673void icmp6_statinc(u_int);
674
675struct ip6ctlparam;
676void icmp6_mtudisc_update(struct ip6ctlparam *, int);
677void icmp6_mtudisc_callback_register(void (*)(struct in6_addr *));
678
679/* XXX: is this the right place for these macros? */
680#define icmp6_ifstat_inc(ifp, tag) \
681do { \
682 if (ifp) \
683 ((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->icmp6_ifstat->tag++; \
684} while (/*CONSTCOND*/ 0)
685
686#define icmp6_ifoutstat_inc(ifp, type, code) \
687do { \
688 icmp6_ifstat_inc(ifp, ifs6_out_msg); \
689 switch(type) { \
690 case ICMP6_DST_UNREACH: \
691 icmp6_ifstat_inc(ifp, ifs6_out_dstunreach); \
692 if (code == ICMP6_DST_UNREACH_ADMIN) \
693 icmp6_ifstat_inc(ifp, ifs6_out_adminprohib); \
694 break; \
695 case ICMP6_PACKET_TOO_BIG: \
696 icmp6_ifstat_inc(ifp, ifs6_out_pkttoobig); \
697 break; \
698 case ICMP6_TIME_EXCEEDED: \
699 icmp6_ifstat_inc(ifp, ifs6_out_timeexceed); \
700 break; \
701 case ICMP6_PARAM_PROB: \
702 icmp6_ifstat_inc(ifp, ifs6_out_paramprob); \
703 break; \
704 case ICMP6_ECHO_REQUEST: \
705 icmp6_ifstat_inc(ifp, ifs6_out_echo); \
706 break; \
707 case ICMP6_ECHO_REPLY: \
708 icmp6_ifstat_inc(ifp, ifs6_out_echoreply); \
709 break; \
710 case MLD_LISTENER_QUERY: \
711 icmp6_ifstat_inc(ifp, ifs6_out_mldquery); \
712 break; \
713 case MLD_LISTENER_REPORT: \
714 icmp6_ifstat_inc(ifp, ifs6_out_mldreport); \
715 break; \
716 case MLD_LISTENER_DONE: \
717 icmp6_ifstat_inc(ifp, ifs6_out_mlddone); \
718 break; \
719 case ND_ROUTER_SOLICIT: \
720 icmp6_ifstat_inc(ifp, ifs6_out_routersolicit); \
721 break; \
722 case ND_ROUTER_ADVERT: \
723 icmp6_ifstat_inc(ifp, ifs6_out_routeradvert); \
724 break; \
725 case ND_NEIGHBOR_SOLICIT: \
726 icmp6_ifstat_inc(ifp, ifs6_out_neighborsolicit); \
727 break; \
728 case ND_NEIGHBOR_ADVERT: \
729 icmp6_ifstat_inc(ifp, ifs6_out_neighboradvert); \
730 break; \
731 case ND_REDIRECT: \
732 icmp6_ifstat_inc(ifp, ifs6_out_redirect); \
733 break; \
734 } \
735} while (/*CONSTCOND*/ 0)
736
737extern int icmp6_rediraccept; /* accept/process redirects */
738extern int icmp6_redirtimeout; /* cache time for redirect routes */
739#endif /* _KERNEL */
740
741#ifdef ICMP6_STRINGS
742/* Info: http://www.iana.org/assignments/icmpv6-parameters */
743
744static const char * const icmp6_type_err[] = {
745 "reserved0", "unreach", "packet_too_big", "timxceed", "paramprob",
746 NULL
747};
748
749static const char * const icmp6_type_info[] = {
750 "echo", "echoreply",
751 "mcastlistenq", "mcastlistenrep", "mcastlistendone",
752 "rtsol", "rtadv", "neighsol", "neighadv", "redirect",
753 "routerrenum", "nodeinfoq", "nodeinfor", "invneighsol", "invneighrep",
754 "mcastlistenrep2", "haad_req", "haad_rep",
755 "mobile_psol", "mobile_padv", "cga_sol", "cga_adv",
756 "experimental150", "mcast_rtadv", "mcast_rtsol", "mcast_rtterm",
757 "fmipv6_msg", "rpl_control", NULL
758};
759
760static const char * const icmp6_code_none[] = { "none", NULL };
761
762static const char * const icmp6_code_unreach[] = {
763 "noroute", "admin", "beyondscope", "addr", "port",
764 "srcaddr_policy", "reject_route", "source_route_err", NULL
765};
766
767static const char * const icmp6_code_timxceed[] = {
768 "intrans", "reass", NULL
769};
770
771static const char * const icmp6_code_paramprob[] = {
772 "hdr_field", "nxthdr_type", "option", NULL
773};
774
775/* not all informational icmps that have codes have a names array */
776#endif
777
778#endif /* !_NETINET_ICMP6_H_ */
779