1/* $NetBSD: in6.h,v 1.101 2021/07/31 10:12:04 andvar Exp $ */
2/* $KAME: in6.h,v 1.83 2001/03/29 02:55:07 jinmei 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, 1990, 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 * @(#)in.h 8.3 (Berkeley) 1/3/94
62 */
63
64#ifndef _NETINET6_IN6_H_
65#define _NETINET6_IN6_H_
66
67#include <sys/featuretest.h>
68
69#ifndef __KAME_NETINET_IN_H_INCLUDED_
70#error "do not include netinet6/in6.h directly, include netinet/in.h. see RFC2553"
71#endif
72
73#include <sys/socket.h>
74#include <sys/endian.h> /* ntohl */
75
76/*
77 * Identification of the network protocol stack
78 * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
79 * has the table of implementation/integration differences.
80 */
81#define __KAME__
82#define __KAME_VERSION "NetBSD-current"
83
84/*
85 * Local port number conventions:
86 *
87 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
88 * unless a kernel is compiled with IPNOPRIVPORTS defined.
89 *
90 * When a user does a bind(2) or connect(2) with a port number of zero,
91 * a non-conflicting local port address is chosen.
92 *
93 * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
94 * that is settable by sysctl(3); net.inet.ip.anonportmin and
95 * net.inet.ip.anonportmax respectively.
96 *
97 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
98 * default assignment range.
99 *
100 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
101 *
102 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
103 * and exists only for FreeBSD compatibility purposes.
104 *
105 * The value IP_PORTRANGE_LOW changes the range to the "low" are
106 * that is (by convention) restricted to privileged processes.
107 * This convention is based on "vouchsafe" principles only.
108 * It is only secure if you trust the remote host to restrict these ports.
109 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
110 */
111
112#if defined(_NETBSD_SOURCE)
113#define IPV6PORT_RESERVED 1024
114#define IPV6PORT_ANONMIN 49152
115#define IPV6PORT_ANONMAX 65535
116#define IPV6PORT_RESERVEDMIN 600
117#define IPV6PORT_RESERVEDMAX (IPV6PORT_RESERVED-1)
118#endif
119
120/*
121 * IPv6 address
122 */
123struct in6_addr {
124 union {
125 __uint8_t __u6_addr8[16];
126 __uint16_t __u6_addr16[8];
127 uint32_t __u6_addr32[4];
128 } __u6_addr; /* 128-bit IP6 address */
129};
130
131#define s6_addr __u6_addr.__u6_addr8
132#ifdef _KERNEL /* XXX nonstandard */
133#define s6_addr8 __u6_addr.__u6_addr8
134#define s6_addr16 __u6_addr.__u6_addr16
135#define s6_addr32 __u6_addr.__u6_addr32
136#endif
137
138#define INET6_ADDRSTRLEN 46
139
140/*
141 * Socket address for IPv6
142 */
143#if defined(_NETBSD_SOURCE)
144#define SIN6_LEN
145#endif
146struct sockaddr_in6 {
147 uint8_t sin6_len; /* length of this struct(socklen_t)*/
148 sa_family_t sin6_family; /* AF_INET6 (sa_family_t) */
149 in_port_t sin6_port; /* Transport layer port */
150 uint32_t sin6_flowinfo; /* IP6 flow information */
151 struct in6_addr sin6_addr; /* IP6 address */
152 uint32_t sin6_scope_id; /* scope zone index */
153};
154
155/*
156 * Local definition for masks
157 */
158#ifdef _KERNEL /* XXX nonstandard */
159#define IN6MASK0 {{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
160#define IN6MASK32 {{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
161 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
162#define IN6MASK64 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
163 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
164#define IN6MASK96 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
165 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
166#define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
167 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
168#endif
169
170#ifdef _KERNEL
171extern const struct sockaddr_in6 sa6_any;
172
173extern const struct in6_addr in6mask0;
174extern const struct in6_addr in6mask32;
175extern const struct in6_addr in6mask64;
176extern const struct in6_addr in6mask96;
177extern const struct in6_addr in6mask128;
178#endif /* _KERNEL */
179
180/*
181 * Macros started with IPV6_ADDR is KAME local
182 */
183#ifdef _KERNEL /* XXX nonstandard */
184#if BYTE_ORDER == BIG_ENDIAN
185#define IPV6_ADDR_INT32_ONE 1
186#define IPV6_ADDR_INT32_TWO 2
187#define IPV6_ADDR_INT32_MNL 0xff010000
188#define IPV6_ADDR_INT32_MLL 0xff020000
189#define IPV6_ADDR_INT32_SMP 0x0000ffff
190#define IPV6_ADDR_INT16_ULL 0xfe80
191#define IPV6_ADDR_INT16_USL 0xfec0
192#define IPV6_ADDR_INT16_MLL 0xff02
193#elif BYTE_ORDER == LITTLE_ENDIAN
194#define IPV6_ADDR_INT32_ONE 0x01000000
195#define IPV6_ADDR_INT32_TWO 0x02000000
196#define IPV6_ADDR_INT32_MNL 0x000001ff
197#define IPV6_ADDR_INT32_MLL 0x000002ff
198#define IPV6_ADDR_INT32_SMP 0xffff0000
199#define IPV6_ADDR_INT16_ULL 0x80fe
200#define IPV6_ADDR_INT16_USL 0xc0fe
201#define IPV6_ADDR_INT16_MLL 0x02ff
202#endif
203#endif
204
205/*
206 * Definition of some useful macros to handle IP6 addresses
207 */
208#define IN6ADDR_ANY_INIT \
209 {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
210 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
211#define IN6ADDR_LOOPBACK_INIT \
212 {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
213 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
214#define IN6ADDR_NODELOCAL_ALLNODES_INIT \
215 {{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
216 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
217#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
218 {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
219 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
220#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
221 {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
222 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
223
224extern const struct in6_addr in6addr_any;
225extern const struct in6_addr in6addr_loopback;
226extern const struct in6_addr in6addr_nodelocal_allnodes;
227extern const struct in6_addr in6addr_linklocal_allnodes;
228extern const struct in6_addr in6addr_linklocal_allrouters;
229
230#define IN6_ARE_ADDR_EQUAL(a, b) \
231 (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
232
233/*
234 * Unspecified
235 */
236#define IN6_IS_ADDR_UNSPECIFIED(a) \
237 ((a)->__u6_addr.__u6_addr32[0] == 0 && \
238 (a)->__u6_addr.__u6_addr32[1] == 0 && \
239 (a)->__u6_addr.__u6_addr32[2] == 0 && \
240 (a)->__u6_addr.__u6_addr32[3] == 0)
241
242/*
243 * Loopback
244 */
245#define IN6_IS_ADDR_LOOPBACK(a) \
246 ((a)->__u6_addr.__u6_addr32[0] == 0 && \
247 (a)->__u6_addr.__u6_addr32[1] == 0 && \
248 (a)->__u6_addr.__u6_addr32[2] == 0 && \
249 (a)->__u6_addr.__u6_addr32[3] == ntohl(1))
250
251/*
252 * IPv4 compatible
253 */
254#define IN6_IS_ADDR_V4COMPAT(a) \
255 ((a)->__u6_addr.__u6_addr32[0] == 0 && \
256 (a)->__u6_addr.__u6_addr32[1] == 0 && \
257 (a)->__u6_addr.__u6_addr32[2] == 0 && \
258 (a)->__u6_addr.__u6_addr32[3] != 0 && \
259 (a)->__u6_addr.__u6_addr32[3] != ntohl(1))
260
261/*
262 * Mapped
263 */
264#define IN6_IS_ADDR_V4MAPPED(a) \
265 ((a)->__u6_addr.__u6_addr32[0] == 0 && \
266 (a)->__u6_addr.__u6_addr32[1] == 0 && \
267 (a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))
268
269/*
270 * KAME Scope Values
271 */
272
273#ifdef _KERNEL /* XXX nonstandard */
274#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
275#define IPV6_ADDR_SCOPE_INTFACELOCAL 0x01
276#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
277#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
278#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 /* just used in this file */
279#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
280#else
281#define __IPV6_ADDR_SCOPE_NODELOCAL 0x01
282#define __IPV6_ADDR_SCOPE_LINKLOCAL 0x02
283#define __IPV6_ADDR_SCOPE_SITELOCAL 0x05
284#define __IPV6_ADDR_SCOPE_ORGLOCAL 0x08 /* just used in this file */
285#define __IPV6_ADDR_SCOPE_GLOBAL 0x0e
286#endif
287
288/*
289 * Unicast Scope
290 * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
291 */
292#define IN6_IS_ADDR_LINKLOCAL(a) \
293 (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
294#define IN6_IS_ADDR_SITELOCAL(a) \
295 (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
296
297/*
298 * Multicast
299 */
300#define IN6_IS_ADDR_MULTICAST(a) ((a)->s6_addr[0] == 0xff)
301
302#ifdef _KERNEL /* XXX nonstandard */
303#define IPV6_ADDR_MC_SCOPE(a) ((a)->s6_addr[1] & 0x0f)
304#else
305#define __IPV6_ADDR_MC_SCOPE(a) ((a)->s6_addr[1] & 0x0f)
306#endif
307
308/*
309 * Multicast Scope
310 */
311#ifdef _KERNEL /* refers nonstandard items */
312#define IN6_IS_ADDR_MC_NODELOCAL(a) \
313 (IN6_IS_ADDR_MULTICAST(a) && \
314 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
315#define IN6_IS_ADDR_MC_INTFACELOCAL(a) \
316 (IN6_IS_ADDR_MULTICAST(a) && \
317 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
318#define IN6_IS_ADDR_MC_LINKLOCAL(a) \
319 (IN6_IS_ADDR_MULTICAST(a) && \
320 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
321#define IN6_IS_ADDR_MC_SITELOCAL(a) \
322 (IN6_IS_ADDR_MULTICAST(a) && \
323 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
324#define IN6_IS_ADDR_MC_ORGLOCAL(a) \
325 (IN6_IS_ADDR_MULTICAST(a) && \
326 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
327#define IN6_IS_ADDR_MC_GLOBAL(a) \
328 (IN6_IS_ADDR_MULTICAST(a) && \
329 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
330#else
331#define IN6_IS_ADDR_MC_NODELOCAL(a) \
332 (IN6_IS_ADDR_MULTICAST(a) && \
333 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
334#define IN6_IS_ADDR_MC_LINKLOCAL(a) \
335 (IN6_IS_ADDR_MULTICAST(a) && \
336 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
337#define IN6_IS_ADDR_MC_SITELOCAL(a) \
338 (IN6_IS_ADDR_MULTICAST(a) && \
339 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
340#define IN6_IS_ADDR_MC_ORGLOCAL(a) \
341 (IN6_IS_ADDR_MULTICAST(a) && \
342 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
343#define IN6_IS_ADDR_MC_GLOBAL(a) \
344 (IN6_IS_ADDR_MULTICAST(a) && \
345 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
346#endif
347
348#ifdef _KERNEL /* nonstandard */
349/*
350 * KAME Scope
351 */
352#define IN6_IS_SCOPE_LINKLOCAL(a) \
353 ((IN6_IS_ADDR_LINKLOCAL(a)) || \
354 (IN6_IS_ADDR_MC_LINKLOCAL(a)))
355
356#define IN6_IS_SCOPE_EMBEDDABLE(__a) \
357 (IN6_IS_SCOPE_LINKLOCAL(__a) || IN6_IS_ADDR_MC_INTFACELOCAL(__a))
358
359#define IFA6_IS_DEPRECATED(a) \
360 ((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
361 (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
362 (a)->ia6_lifetime.ia6t_pltime)
363#define IFA6_IS_INVALID(a) \
364 ((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
365 (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
366 (a)->ia6_lifetime.ia6t_vltime)
367#endif
368
369/*
370 * Options for use with [gs]etsockopt at the IPV6 level.
371 * First word of comment is data type; bool is stored in int.
372 */
373/* no hdrincl */
374#if 0
375/* These are deprecated non-standard options which are no longer supported. */
376#define IPV6_OPTIONS 1 /* buf/ip6_opts; set/get IP6 options */
377#define IPV6_RECVOPTS 5 /* bool; receive all IP6 opts w/dgram */
378#define IPV6_RECVRETOPTS 6 /* bool; receive IP6 opts for response */
379#define IPV6_RECVDSTADDR 7 /* bool; receive IP6 dst addr w/dgram */
380#define IPV6_RETOPTS 8 /* ip6_opts; set/get IP6 options */
381#endif
382#define IPV6_SOCKOPT_RESERVED1 3 /* reserved for future use */
383#define IPV6_UNICAST_HOPS 4 /* int; IP6 hops */
384#define IPV6_MULTICAST_IF 9 /* u_int; set/get IP6 multicast i/f */
385#define IPV6_MULTICAST_HOPS 10 /* int; set/get IP6 multicast hops */
386#define IPV6_MULTICAST_LOOP 11 /* u_int; set/get IP6 multicast loopback */
387/* The join and leave membership option numbers need to match with the v4 ones */
388#define IPV6_JOIN_GROUP 12 /* ip6_mreq; join a group membership */
389#define IPV6_LEAVE_GROUP 13 /* ip6_mreq; leave a group membership */
390#define IPV6_PORTRANGE 14 /* int; range to choose for unspec port */
391#if defined(_NETBSD_SOURCE)
392#define IPV6_PORTALGO 17 /* int; port selection algo (rfc6056) */
393#define ICMP6_FILTER 18 /* icmp6_filter; icmp6 filter */
394#endif
395/* RFC2292 options */
396#ifdef _KERNEL
397#define IPV6_2292PKTINFO 19 /* bool; send/recv if, src/dst addr */
398#define IPV6_2292HOPLIMIT 20 /* bool; hop limit */
399#define IPV6_2292NEXTHOP 21 /* bool; next hop addr */
400#define IPV6_2292HOPOPTS 22 /* bool; hop-by-hop option */
401#define IPV6_2292DSTOPTS 23 /* bool; destination option */
402#define IPV6_2292RTHDR 24 /* bool; routing header */
403#define IPV6_2292PKTOPTIONS 25 /* buf/cmsghdr; set/get IPv6 options */
404#endif
405#define IPV6_CHECKSUM 26 /* int; checksum offset for raw socket */
406#define IPV6_V6ONLY 27 /* bool; make AF_INET6 sockets v6 only */
407
408#define IPV6_IPSEC_POLICY 28 /* struct; get/set security policy */
409#define IPV6_FAITH 29 /* bool; accept FAITH'ed connections */
410
411/* new socket options introduced in RFC3542 */
412#define IPV6_RTHDRDSTOPTS 35 /* ip6_dest; send dst option before rthdr */
413
414#define IPV6_RECVPKTINFO 36 /* bool; recv if, dst addr */
415#define IPV6_RECVHOPLIMIT 37 /* bool; recv hop limit */
416#define IPV6_RECVRTHDR 38 /* bool; recv routing header */
417#define IPV6_RECVHOPOPTS 39 /* bool; recv hop-by-hop option */
418#define IPV6_RECVDSTOPTS 40 /* bool; recv dst option after rthdr */
419#ifdef _KERNEL
420#define IPV6_RECVRTHDRDSTOPTS 41 /* bool; recv dst option before rthdr */
421#endif
422#define IPV6_USE_MIN_MTU 42 /* bool; send packets at the minimum MTU */
423#define IPV6_RECVPATHMTU 43 /* bool; notify an according MTU */
424#define IPV6_PATHMTU 44 /* mtuinfo; get the current path MTU (sopt),
425 4 bytes int; MTU notification (cmsg) */
426
427/* more new socket options introduced in RFC3542 */
428#define IPV6_PKTINFO 46 /* in6_pktinfo; send if, src addr */
429#define IPV6_HOPLIMIT 47 /* int; send hop limit */
430#define IPV6_NEXTHOP 48 /* sockaddr; next hop addr */
431#define IPV6_HOPOPTS 49 /* ip6_hbh; send hop-by-hop option */
432#define IPV6_DSTOPTS 50 /* ip6_dest; send dst option before rthdr */
433#define IPV6_RTHDR 51 /* ip6_rthdr; send routing header */
434
435#define IPV6_RECVTCLASS 57 /* bool; recv traffic class values */
436#ifdef _KERNEL
437#define IPV6_OTCLASS 58 /* u_int8_t; send traffic class value */
438#endif
439
440#define IPV6_TCLASS 61 /* int; send traffic class value */
441#define IPV6_DONTFRAG 62 /* bool; disable IPv6 fragmentation */
442#define IPV6_PREFER_TEMPADDR 63 /* int; prefer temporary address as
443 * the source address */
444#define IPV6_BINDANY 64 /* bool: allow bind to any address */
445/* to define items, should talk with KAME guys first, for *BSD compatibility */
446
447#define IPV6_RTHDR_LOOSE 0 /* this hop need not be a neighbor. XXX old spec */
448#define IPV6_RTHDR_STRICT 1 /* this hop must be a neighbor. XXX old spec */
449#define IPV6_RTHDR_TYPE_0 0 /* IPv6 routing header type 0 */
450
451/*
452 * Defaults and limits for options
453 */
454#define IPV6_DEFAULT_MULTICAST_HOPS 1 /* normally limit m'casts to 1 hop */
455#define IPV6_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
456
457/*
458 * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
459 */
460struct ipv6_mreq {
461 struct in6_addr ipv6mr_multiaddr;
462 unsigned int ipv6mr_interface;
463};
464
465/*
466 * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
467 */
468struct in6_pktinfo {
469 struct in6_addr ipi6_addr; /* src/dst IPv6 address */
470 unsigned int ipi6_ifindex; /* send/recv interface index */
471};
472
473/*
474 * Control structure for IPV6_RECVPATHMTU socket option.
475 */
476struct ip6_mtuinfo {
477 struct sockaddr_in6 ip6m_addr; /* or sockaddr_storage? */
478 uint32_t ip6m_mtu;
479};
480
481/*
482 * Argument for IPV6_PORTRANGE:
483 * - which range to search when port is unspecified at bind() or connect()
484 */
485#define IPV6_PORTRANGE_DEFAULT 0 /* default range */
486#define IPV6_PORTRANGE_HIGH 1 /* "high" - request firewall bypass */
487#define IPV6_PORTRANGE_LOW 2 /* "low" - vouchsafe security */
488
489#if defined(_NETBSD_SOURCE)
490/*
491 * Definitions for inet6 sysctl operations.
492 *
493 * Third level is protocol number.
494 * Fourth level is desired variable within that protocol.
495 */
496/*
497 * Names for IP sysctl objects
498 */
499#define IPV6CTL_FORWARDING 1 /* act as router */
500#define IPV6CTL_SENDREDIRECTS 2 /* may send redirects when forwarding*/
501#define IPV6CTL_DEFHLIM 3 /* default Hop-Limit */
502/* IPV6CTL_DEFMTU=4, never implemented */
503#define IPV6CTL_FORWSRCRT 5 /* forward source-routed dgrams */
504#define IPV6CTL_STATS 6 /* stats */
505#define IPV6CTL_MRTSTATS 7 /* multicast forwarding stats */
506#define IPV6CTL_MRTPROTO 8 /* multicast routing protocol */
507#define IPV6CTL_MAXFRAGPACKETS 9 /* max packets reassembly queue */
508#define IPV6CTL_SOURCECHECK 10 /* verify source route and intf */
509#define IPV6CTL_SOURCECHECK_LOGINT 11 /* minimum logging interval */
510/* 12 was IPV6CTL_ACCEPT_RTADV */
511#define IPV6CTL_KEEPFAITH 13
512#define IPV6CTL_LOG_INTERVAL 14
513#define IPV6CTL_HDRNESTLIMIT 15
514#define IPV6CTL_DAD_COUNT 16
515#define IPV6CTL_AUTO_FLOWLABEL 17
516#define IPV6CTL_DEFMCASTHLIM 18
517#define IPV6CTL_GIF_HLIM 19 /* default HLIM for gif encap packet */
518#define IPV6CTL_KAME_VERSION 20
519#define IPV6CTL_USE_DEPRECATED 21 /* use deprecated addr (RFC2462 5.5.4) */
520/* 22 was IPV6CTL_RR_PRUNE */
521/* 23: reserved */
522#define IPV6CTL_V6ONLY 24
523/* 25 to 27: reserved */
524#define IPV6CTL_ANONPORTMIN 28 /* minimum ephemeral port */
525#define IPV6CTL_ANONPORTMAX 29 /* maximum ephemeral port */
526#define IPV6CTL_LOWPORTMIN 30 /* minimum reserved port */
527#define IPV6CTL_LOWPORTMAX 31 /* maximum reserved port */
528/* 32 to 34: reserved */
529#define IPV6CTL_AUTO_LINKLOCAL 35 /* automatic link-local addr assign */
530/* 36 to 37: reserved */
531#define IPV6CTL_ADDRCTLPOLICY 38 /* get/set address selection policy */
532#define IPV6CTL_USE_DEFAULTZONE 39 /* use default scope zone */
533/* 40: reserved */
534#define IPV6CTL_MAXFRAGS 41 /* max fragments */
535#define IPV6CTL_IFQ 42 /* IPv6 packet input queue */
536/* 43 was IPV6CTL_RTADV_MAXROUTES */
537/* 44 was IPV6CTL_RTADV_NUMROUTES */
538#define IPV6CTL_GIF_PMTU 45 /* gif(4) Path MTU setting */
539#define IPV6CTL_IPSEC_HLIM 46 /* default HLIM for ipsecif encap packet */
540#define IPV6CTL_IPSEC_PMTU 47 /* ipsecif(4) Path MTU setting */
541#endif /* _NETBSD_SOURCE */
542
543#ifdef _KERNEL
544struct cmsghdr;
545
546/*
547 * in6_cksum_phdr:
548 *
549 * Compute significant parts of the IPv6 checksum pseudo-header
550 * for use in a delayed TCP/UDP checksum calculation.
551 *
552 * Args:
553 *
554 * src Source IPv6 address
555 * dst Destination IPv6 address
556 * len htonl(proto-hdr-len)
557 * nxt htonl(next-proto-number)
558 *
559 * NOTE: We expect the src and dst addresses to be 16-bit
560 * aligned!
561 */
562static __inline u_int16_t __unused
563in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst,
564 u_int32_t len, u_int32_t nxt)
565{
566 u_int32_t sum = 0;
567 const u_int16_t *w;
568
569 /*LINTED*/
570 w = (const u_int16_t *) src;
571 sum += w[0];
572 if (!IN6_IS_SCOPE_LINKLOCAL(src))
573 sum += w[1];
574 sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
575 sum += w[6]; sum += w[7];
576
577 /*LINTED*/
578 w = (const u_int16_t *) dst;
579 sum += w[0];
580 if (!IN6_IS_SCOPE_LINKLOCAL(dst))
581 sum += w[1];
582 sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5];
583 sum += w[6]; sum += w[7];
584
585 sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/);
586
587 sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/);
588
589 sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
590
591 if (sum > 0xffff)
592 sum -= 0xffff;
593
594 return (sum);
595}
596
597struct mbuf;
598struct ifnet;
599int sockaddr_in6_cmp(const struct sockaddr *, const struct sockaddr *);
600struct sockaddr *sockaddr_in6_externalize(struct sockaddr *, socklen_t,
601 const struct sockaddr *);
602int in6_cksum(struct mbuf *, u_int8_t, u_int32_t, u_int32_t);
603int in6_localaddr(const struct in6_addr *);
604int in6_addrscope(const struct in6_addr *);
605struct in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
606extern void in6_if_link_up(struct ifnet *);
607extern void in6_if_link_down(struct ifnet *);
608extern void in6_if_link_state_change(struct ifnet *, int);
609extern void in6_if_up(struct ifnet *);
610extern void in6_if_down(struct ifnet *);
611extern void addrsel_policy_init(void);
612extern u_char ip6_protox[];
613
614struct ip6_hdr;
615int in6_tunnel_validate(const struct ip6_hdr *, const struct in6_addr *,
616 const struct in6_addr *);
617
618#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
619#define satocsin6(sa) ((const struct sockaddr_in6 *)(sa))
620#define sin6tosa(sin6) ((struct sockaddr *)(sin6))
621#define sin6tocsa(sin6) ((const struct sockaddr *)(sin6))
622#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
623
624static __inline void
625sockaddr_in6_init1(struct sockaddr_in6 *sin6, const struct in6_addr *addr,
626 in_port_t port, uint32_t flowinfo, uint32_t scope_id)
627{
628 sin6->sin6_port = port;
629 sin6->sin6_flowinfo = flowinfo;
630 sin6->sin6_addr = *addr;
631 sin6->sin6_scope_id = scope_id;
632}
633
634static __inline void
635sockaddr_in6_init(struct sockaddr_in6 *sin6, const struct in6_addr *addr,
636 in_port_t port, uint32_t flowinfo, uint32_t scope_id)
637{
638 sin6->sin6_family = AF_INET6;
639 sin6->sin6_len = sizeof(*sin6);
640 sockaddr_in6_init1(sin6, addr, port, flowinfo, scope_id);
641}
642
643static __inline struct sockaddr *
644sockaddr_in6_alloc(const struct in6_addr *addr, in_port_t port,
645 uint32_t flowinfo, uint32_t scope_id, int flags)
646{
647 struct sockaddr *sa;
648
649 if ((sa = sockaddr_alloc(AF_INET6, sizeof(struct sockaddr_in6),
650 flags)) == NULL)
651 return NULL;
652
653 sockaddr_in6_init1(satosin6(sa), addr, port, flowinfo, scope_id);
654
655 return sa;
656}
657#endif /* _KERNEL */
658
659#if defined(_NETBSD_SOURCE)
660
661#include <machine/ansi.h>
662
663#ifdef _BSD_SIZE_T_
664typedef _BSD_SIZE_T_ size_t;
665#define _SIZE_T
666#undef _BSD_SIZE_T_
667#endif
668
669#include <sys/cdefs.h>
670
671__BEGIN_DECLS
672struct cmsghdr;
673
674void in6_in_2_v4mapin6(const struct in_addr *, struct in6_addr *);
675void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *);
676void in6_sin_2_v4mapsin6(const struct sockaddr_in *, struct sockaddr_in6 *);
677void in6_sin6_2_sin_in_sock(struct sockaddr *);
678void in6_sin_2_v4mapsin6_in_sock(struct sockaddr **);
679
680#define INET6_IS_ADDR_LINKLOCAL 1
681#define INET6_IS_ADDR_MC_LINKLOCAL 2
682#define INET6_IS_ADDR_SITELOCAL 4
683void inet6_getscopeid(struct sockaddr_in6 *, int);
684void inet6_putscopeid(struct sockaddr_in6 *, int);
685
686extern int inet6_option_space(int);
687extern int inet6_option_init(void *, struct cmsghdr **, int);
688extern int inet6_option_append(struct cmsghdr *, const uint8_t *,
689 int, int);
690extern uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
691extern int inet6_option_next(const struct cmsghdr *, uint8_t **);
692extern int inet6_option_find(const struct cmsghdr *, uint8_t **, int);
693
694extern size_t inet6_rthdr_space(int, int);
695extern struct cmsghdr *inet6_rthdr_init(void *, int);
696extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
697 unsigned int);
698extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
699#if 0 /* not implemented yet */
700extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
701#endif
702extern int inet6_rthdr_segments(const struct cmsghdr *);
703extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
704extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
705
706extern int inet6_opt_init(void *, socklen_t);
707extern int inet6_opt_append(void *, socklen_t, int, uint8_t,
708 socklen_t, uint8_t, void **);
709extern int inet6_opt_finish(void *, socklen_t, int);
710extern int inet6_opt_set_val(void *, int, void *, socklen_t);
711
712extern int inet6_opt_next(void *, socklen_t, int, uint8_t *,
713 socklen_t *, void **);
714extern int inet6_opt_find(void *, socklen_t, int, uint8_t,
715 socklen_t *, void **);
716extern int inet6_opt_get_val(void *, int, void *, socklen_t);
717extern socklen_t inet6_rth_space(int, int);
718extern void *inet6_rth_init(void *, socklen_t, int, int);
719extern int inet6_rth_add(void *, const struct in6_addr *);
720extern int inet6_rth_reverse(const void *, void *);
721extern int inet6_rth_segments(const void *);
722extern struct in6_addr *inet6_rth_getaddr(const void *, int);
723__END_DECLS
724#endif /* _NETBSD_SOURCE */
725
726#if defined(_KERNEL) || defined(_TEST)
727int in6_print(char *, size_t, const struct in6_addr *);
728#define IN6_PRINT(b, a) (in6_print((b), sizeof(b), (a)), (b))
729int sin6_print(char *, size_t, const void *);
730#endif
731
732#endif /* !_NETINET6_IN6_H_ */