xref: /openbsd/sys/netinet6/in6.h (revision 54fbbda3)
1 /*	$OpenBSD: in6.h,v 1.119 2024/09/01 03:09:00 jsg 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 __KAME_NETINET_IN_H_INCLUDED_
65 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
66 #endif
67 
68 #ifndef _NETINET6_IN6_H_
69 #define _NETINET6_IN6_H_
70 
71 /*
72  * Identification of the network protocol stack
73  * for *BSD-current/release: http://www.kame.net/dev/cvsweb2.cgi/kame/COVERAGE
74  * has the table of implementation/integration differences.
75  */
76 #define __KAME__
77 
78 /*
79  * IPv6 address
80  */
81 struct in6_addr {
82 	union {
83 		u_int8_t   __u6_addr8[16];
84 		u_int16_t  __u6_addr16[8];
85 		u_int32_t  __u6_addr32[4];
86 	} __u6_addr;			/* 128-bit IP6 address */
87 };
88 
89 #define s6_addr   __u6_addr.__u6_addr8
90 #ifdef _KERNEL	/* XXX nonstandard */
91 #define s6_addr8  __u6_addr.__u6_addr8
92 #define s6_addr16 __u6_addr.__u6_addr16
93 #define s6_addr32 __u6_addr.__u6_addr32
94 #endif
95 
96 #ifndef INET6_ADDRSTRLEN
97 #define INET6_ADDRSTRLEN	46
98 #endif
99 
100 /*
101  * Socket address for IPv6
102  */
103 #if __BSD_VISIBLE
104 #define SIN6_LEN	/* Indicates sockaddr_in6 has a sin6_len field */
105 #endif /* __BSD_VISIBLE */
106 struct sockaddr_in6 {
107 	u_int8_t	sin6_len;	/* length of this struct(sa_family_t)*/
108 	sa_family_t	sin6_family;	/* AF_INET6 (sa_family_t) */
109 	in_port_t	sin6_port;	/* Transport layer port # (in_port_t)*/
110 	u_int32_t	sin6_flowinfo;	/* IP6 flow information */
111 	struct in6_addr	sin6_addr;	/* IP6 address */
112 	u_int32_t	sin6_scope_id;	/* intface scope id */
113 };
114 
115 
116 /*
117  * Local definition for masks
118  */
119 #ifdef _KERNEL	/* XXX nonstandard */
120 #define IN6MASK0	{{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
121 #define IN6MASK32	{{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
122 			    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
123 #define IN6MASK64	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
124 			    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
125 #define IN6MASK96	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
126 			    0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
127 #define IN6MASK128	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
128 			    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
129 
130 extern const struct sockaddr_in6 sa6_any;
131 
132 extern const struct in6_addr in6mask0;
133 extern const struct in6_addr in6mask32;
134 extern const struct in6_addr in6mask64;
135 extern const struct in6_addr in6mask96;
136 extern const struct in6_addr in6mask128;
137 #endif /* _KERNEL */
138 
139 /* Both kernel and libc define these for use */
140 extern const struct in6_addr in6addr_any;
141 extern const struct in6_addr in6addr_loopback;
142 extern const struct in6_addr in6addr_intfacelocal_allnodes;
143 extern const struct in6_addr in6addr_linklocal_allnodes;
144 extern const struct in6_addr in6addr_linklocal_allrouters;
145 
146 #if __BSD_VISIBLE
147 /*
148  * Definition of some useful macros to handle IP6 addresses
149  */
150 #define IN6ADDR_ANY_INIT \
151 	{{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
152 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
153 #define IN6ADDR_LOOPBACK_INIT \
154 	{{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
155 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
156 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
157 	{{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
158 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
159 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
160 	{{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
161 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
162 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
163 	{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
164 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
165 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
166 	{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
167 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
168 
169 #define IN6_ARE_ADDR_EQUAL(a, b)			\
170     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
171 
172 #endif /* __BSD_VISIBLE */
173 
174 /*
175  * Macros started with IPV6_ADDR is KAME local
176  */
177 #define __IPV6_ADDR_INT32_ONE	htonl(1)
178 #define __IPV6_ADDR_INT32_TWO	htonl(2)
179 #define __IPV6_ADDR_INT32_MNL	htonl(0xff010000)
180 #define __IPV6_ADDR_INT32_MLL	htonl(0xff020000)
181 #define __IPV6_ADDR_INT32_SMP	htonl(0x0000ffff)
182 #define __IPV6_ADDR_INT16_ULL	htons(0xfe80)
183 #define __IPV6_ADDR_INT16_USL	htons(0xfec0)
184 #define __IPV6_ADDR_INT16_MLL	htons(0xff02)
185 
186 /*
187  * Unspecified
188  */
189 #define IN6_IS_ADDR_UNSPECIFIED(a)	\
190 	((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
191 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
192 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&	\
193 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == 0))
194 
195 /*
196  * Loopback
197  */
198 #define IN6_IS_ADDR_LOOPBACK(a)		\
199 	((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
200 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
201 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&	\
202 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) == __IPV6_ADDR_INT32_ONE))
203 
204 /*
205  * IPv4 compatible
206  */
207 #define IN6_IS_ADDR_V4COMPAT(a)		\
208 	((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
209 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
210 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == 0) &&	\
211 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != 0) &&	\
212 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[12]) != __IPV6_ADDR_INT32_ONE))
213 
214 /*
215  * Mapped
216  */
217 #define IN6_IS_ADDR_V4MAPPED(a)		      \
218 	((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) &&	\
219 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) &&	\
220 	 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == __IPV6_ADDR_INT32_SMP))
221 
222 /*
223  * Unicast Scope
224  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
225  */
226 #define IN6_IS_ADDR_LINKLOCAL(a)	\
227 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
228 #define IN6_IS_ADDR_SITELOCAL(a)	\
229 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
230 
231 /*
232  * Multicast
233  */
234 #define __IPV6_ADDR_MC_SCOPE(a)		((a)->s6_addr[1] & 0x0f)
235 #define IN6_IS_ADDR_MULTICAST(a)	((a)->s6_addr[0] == 0xff)
236 
237 #define __IPV6_ADDR_SCOPE_NODELOCAL	0x01
238 #define __IPV6_ADDR_SCOPE_INTFACELOCAL	0x01
239 #define __IPV6_ADDR_SCOPE_LINKLOCAL	0x02
240 #define __IPV6_ADDR_SCOPE_SITELOCAL	0x05
241 #define __IPV6_ADDR_SCOPE_ORGLOCAL	0x08	/* just used in this file */
242 #define __IPV6_ADDR_SCOPE_GLOBAL	0x0e
243 
244 #define IN6_IS_ADDR_MC_NODELOCAL(a)	\
245 	(IN6_IS_ADDR_MULTICAST(a) &&	\
246 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
247 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)	\
248 	(IN6_IS_ADDR_MULTICAST(a) &&	\
249 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_INTFACELOCAL))
250 #define IN6_IS_ADDR_MC_LINKLOCAL(a)	\
251 	(IN6_IS_ADDR_MULTICAST(a) &&	\
252 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
253 #define IN6_IS_ADDR_MC_SITELOCAL(a)	\
254 	(IN6_IS_ADDR_MULTICAST(a) &&	\
255 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
256 #define IN6_IS_ADDR_MC_ORGLOCAL(a)	\
257 	(IN6_IS_ADDR_MULTICAST(a) &&	\
258 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
259 #define IN6_IS_ADDR_MC_GLOBAL(a)	\
260 	(IN6_IS_ADDR_MULTICAST(a) &&	\
261 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
262 
263 #ifdef _KERNEL
264 #define IN6_IS_SCOPE_LINKLOCAL(a)	\
265 	((IN6_IS_ADDR_LINKLOCAL(a)) ||	\
266 	 (IN6_IS_ADDR_MC_LINKLOCAL(a)))
267 #define IN6_IS_SCOPE_EMBED(a)	\
268 	((IN6_IS_ADDR_LINKLOCAL(a)) ||	\
269 	 (IN6_IS_ADDR_MC_LINKLOCAL(a)) || \
270 	 (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
271 
272 #define IFA6_IS_DEPRECATED(a) \
273 	((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
274 	 (u_int32_t)((getuptime() - (a)->ia6_updatetime)) > \
275 	 (a)->ia6_lifetime.ia6t_pltime)
276 #define IFA6_IS_INVALID(a) \
277 	((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
278 	 (u_int32_t)((getuptime() - (a)->ia6_updatetime)) > \
279 	 (a)->ia6_lifetime.ia6t_vltime)
280 
281 #endif /* _KERNEL */
282 
283 /*
284  * Options for use with [gs]etsockopt at the IPV6 level.
285  * First word of comment is data type; bool is stored in int.
286  */
287 #define IPV6_UNICAST_HOPS	4  /* int; IP6 hops */
288 #define IPV6_MULTICAST_IF	9  /* u_int; set/get IP6 multicast i/f */
289 #define IPV6_MULTICAST_HOPS	10 /* u_int; set/get IP6 multicast hops */
290 #define IPV6_MULTICAST_LOOP	11 /* u_int; set/get IP6 multicast loopback */
291 #define IPV6_JOIN_GROUP		12 /* ip6_mreq; join a group membership */
292 #define IPV6_LEAVE_GROUP	13 /* ip6_mreq; leave a group membership */
293 #define IPV6_PORTRANGE		14 /* int; range to choose for unspec port */
294 #if __BSD_VISIBLE
295 #define ICMP6_FILTER		18 /* icmp6_filter; icmp6 filter */
296 #endif
297 
298 #define IPV6_CHECKSUM		26 /* int; checksum offset for raw socket */
299 #define IPV6_V6ONLY		27 /* bool; make AF_INET6 sockets v6 only */
300 
301 /* new socket options introduced in RFC3542 */
302 #define IPV6_RTHDRDSTOPTS	35 /* ip6_dest; send dst option before rthdr */
303 
304 #define IPV6_RECVPKTINFO	36 /* bool; recv if, dst addr */
305 #define IPV6_RECVHOPLIMIT	37 /* bool; recv hop limit */
306 #define IPV6_RECVRTHDR		38 /* bool; recv routing header */
307 #define IPV6_RECVHOPOPTS	39 /* bool; recv hop-by-hop option */
308 #define IPV6_RECVDSTOPTS	40 /* bool; recv dst option after rthdr */
309 
310 #define IPV6_USE_MIN_MTU	42 /* bool; send packets at the minimum MTU */
311 #define IPV6_RECVPATHMTU	43 /* bool; notify an according MTU */
312 
313 #define IPV6_PATHMTU		44 /* mtuinfo; get the current path MTU (sopt),
314 				      4 bytes int; MTU notification (cmsg) */
315 
316 /* More new socket options introduced in RFC3542 */
317 #define IPV6_PKTINFO		46 /* in6_pktinfo; send if, src addr */
318 #define IPV6_HOPLIMIT		47 /* int; send hop limit */
319 #define IPV6_NEXTHOP		48 /* sockaddr; next hop addr */
320 #define IPV6_HOPOPTS		49 /* ip6_hbh; send hop-by-hop option */
321 #define IPV6_DSTOPTS		50 /* ip6_dest; send dst option before rthdr */
322 #define IPV6_RTHDR		51 /* ip6_rthdr; send routing header */
323 
324 #define IPV6_AUTH_LEVEL		53   /* int; authentication used */
325 #define IPV6_ESP_TRANS_LEVEL	54   /* int; transport encryption */
326 #define IPV6_ESP_NETWORK_LEVEL	55   /* int; full-packet encryption */
327 #if __BSD_VISIBLE
328 #define IPSEC6_OUTSA		56   /* set the outbound SA for a socket */
329 #endif
330 #define IPV6_RECVTCLASS		57   /* bool; recv traffic class values */
331 
332 #define IPV6_AUTOFLOWLABEL	59   /* bool; attach flowlabel automagically */
333 #define IPV6_IPCOMP_LEVEL	60   /* int; compression */
334 
335 #define IPV6_TCLASS		61   /* int; send traffic class value */
336 #define IPV6_DONTFRAG		62   /* bool; disable IPv6 fragmentation */
337 #define IPV6_PIPEX		63   /* bool; using PIPEX */
338 
339 #define IPV6_RECVDSTPORT	64   /* bool; receive IP dst port w/dgram */
340 #define IPV6_MINHOPCOUNT	65   /* int; minimum recv hop limit */
341 
342 #define IPV6_RTABLE		0x1021	/* int; routing table, see SO_RTABLE */
343 
344 /* to define items, should talk with KAME guys first, for *BSD compatibility */
345 #define IPV6_RTHDR_LOOSE	0	/* this hop need not be a neighbor */
346 #define IPV6_RTHDR_TYPE_0	0	/* IPv6 routing header type 0 */
347 
348 /*
349  * Defaults and limits for options
350  */
351 #define IPV6_DEFAULT_MULTICAST_HOPS 1	/* normally limit m'casts to 1 hop */
352 #define IPV6_DEFAULT_MULTICAST_LOOP 1	/* normally hear sends if a member */
353 
354 /*
355  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
356  */
357 struct ipv6_mreq {
358 	struct in6_addr	ipv6mr_multiaddr;
359 	unsigned int	ipv6mr_interface;
360 };
361 
362 /*
363  * IPV6_PKTINFO: Packet information(RFC3542 sec 6)
364  */
365 struct in6_pktinfo {
366 	struct in6_addr	ipi6_addr;	/* src/dst IPv6 address */
367 	unsigned int	ipi6_ifindex;	/* send/recv interface index */
368 };
369 
370 /*
371  * Control structure for IPV6_RECVPATHMTU socket option.
372  * XXX Not allowed here by POSIX, but required by RFC 3542, so go
373  * XXX with the code on the pavement.
374  */
375 struct ip6_mtuinfo {
376 	struct sockaddr_in6 ip6m_addr;	/* or sockaddr_storage? */
377 	u_int32_t ip6m_mtu;
378 };
379 
380 /*
381  * Argument for IPV6_PORTRANGE:
382  * - which range to search when port is unspecified at bind() or connect()
383  */
384 #define	IPV6_PORTRANGE_DEFAULT	0	/* default range */
385 #define	IPV6_PORTRANGE_HIGH	1	/* "high" - request firewall bypass */
386 #define	IPV6_PORTRANGE_LOW	2	/* "low" - vouchsafe security */
387 
388 #ifdef __BSD_VISIBLE
389 
390 #ifndef	_SOCKLEN_T_DEFINED_
391 #define	_SOCKLEN_T_DEFINED_
392 typedef	__socklen_t	socklen_t;	/* length type for network syscalls */
393 #endif
394 
395 #endif /* __BSD_VISIBLE */
396 
397 #ifdef _KERNEL
398 extern const u_char inet6ctlerrmap[];
399 extern const struct in6_addr zeroin6_addr;
400 
401 struct mbuf;
402 struct sockaddr;
403 struct sockaddr_in6;
404 struct ifaddr;
405 struct in6_ifaddr;
406 struct ifnet;
407 struct rtentry;
408 
409 void	ipv6_input(struct ifnet *, struct mbuf *);
410 struct mbuf *
411 	ipv6_check(struct ifnet *, struct mbuf *);
412 
413 int	in6_cksum(struct mbuf *, uint8_t, uint32_t, uint32_t);
414 void	in6_proto_cksum_out(struct mbuf *, struct ifnet *);
415 int	in6_addrscope(struct in6_addr *);
416 struct	in6_ifaddr *in6_ifawithscope(struct ifnet *, struct in6_addr *, u_int,
417 	    struct rtentry *);
418 int	in6_mask2len(struct in6_addr *, u_char *);
419 int	in6_nam2sin6(const struct mbuf *, struct sockaddr_in6 **);
420 int	in6_sa2sin6(struct sockaddr *, struct sockaddr_in6 **);
421 
422 struct ip6_pktopts;
423 struct ip6_moptions;
424 
425 int	in6_embedscope(struct in6_addr *, const struct sockaddr_in6 *,
426 	    const struct ip6_pktopts *, const struct ip6_moptions *);
427 void	in6_recoverscope(struct sockaddr_in6 *, const struct in6_addr *);
428 void	in6_clearscope(struct in6_addr *);
429 
430 /*
431  * Convert between address family specific and general structs.
432  * Inline functions check the source type and are stricter than
433  * casts or defines.
434  */
435 
436 static inline struct sockaddr_in6 *
satosin6(struct sockaddr * sa)437 satosin6(struct sockaddr *sa)
438 {
439 	return ((struct sockaddr_in6 *)(sa));
440 }
441 
442 static inline const struct sockaddr_in6 *
satosin6_const(const struct sockaddr * sa)443 satosin6_const(const struct sockaddr *sa)
444 {
445 	return ((const struct sockaddr_in6 *)(sa));
446 }
447 
448 static inline struct sockaddr *
sin6tosa(struct sockaddr_in6 * sin6)449 sin6tosa(struct sockaddr_in6 *sin6)
450 {
451 	return ((struct sockaddr *)(sin6));
452 }
453 
454 static inline const struct sockaddr *
sin6tosa_const(const struct sockaddr_in6 * sin6)455 sin6tosa_const(const struct sockaddr_in6 *sin6)
456 {
457 	return ((const struct sockaddr *)(sin6));
458 }
459 
460 static inline struct in6_ifaddr *
ifatoia6(struct ifaddr * ifa)461 ifatoia6(struct ifaddr *ifa)
462 {
463 	return ((struct in6_ifaddr *)(ifa));
464 }
465 
466 #endif /* _KERNEL */
467 
468 #if __BSD_VISIBLE
469 /*
470  * Definitions for inet6 sysctl operations.
471  *
472  * Third level is protocol number.
473  * Fourth level is desired variable within that protocol.
474  */
475 #define IPV6PROTO_MAXID	(IPPROTO_DIVERT + 1)	/* don't list to IPV6PROTO_MAX */
476 
477 #define CTL_IPV6PROTO_NAMES { \
478 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
479 	{ 0, 0 }, \
480 	{ "tcp6", CTLTYPE_NODE }, \
481 	{ 0, 0 }, \
482 	{ 0, 0 }, \
483 	{ 0, 0 }, \
484 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
485 	{ 0, 0 }, \
486 	{ 0, 0 }, \
487 	{ "udp6", CTLTYPE_NODE }, \
488 	{ 0, 0 }, \
489 	{ 0, 0 }, \
490 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
491 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
492 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
493 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
494 	{ 0, 0 }, \
495 	{ "ip6", CTLTYPE_NODE }, \
496 	{ 0, 0 }, \
497 	{ 0, 0 }, \
498 	{ 0, 0 }, \
499 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
500 	{ 0, 0 }, \
501 	{ "ipsec6", CTLTYPE_NODE }, \
502 	{ 0, 0 }, \
503 	{ 0, 0 }, \
504 	{ 0, 0 }, \
505 	{ 0, 0 }, \
506 	{ 0, 0 }, \
507 	{ 0, 0 }, \
508 	{ "icmp6", CTLTYPE_NODE }, \
509 	{ 0, 0 }, \
510 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
511 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
512 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
513 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
514 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
515 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
516 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
517 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
518 	{ 0, 0 }, \
519 	{ 0, 0 }, \
520 	{ 0, 0 }, \
521 	{ 0, 0 }, \
522 	{ 0, 0 }, \
523 	{ 0, 0 }, \
524 	{ 0, 0 }, \
525 	{ 0, 0 }, \
526 	{ 0, 0 }, \
527 	{ 0, 0 }, \
528 /*110*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
529 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
530 /*120*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
531 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
532 /*130*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
533 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
534 /*140*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
535 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
536 /*150*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
537 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
538 /*160*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
539 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
540 /*170*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
541 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
542 /*180*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
543 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
544 /*190*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
545 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
546 /*200*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
547 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
548 /*210*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
549 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
550 /*220*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
551 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
552 /*230*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
553 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
554 /*240*/	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
555 	{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
556 /*250*/	{ 0, 0 }, \
557 	{ 0, 0 }, \
558 	{ 0, 0 }, \
559 	{ 0, 0 }, \
560 	{ 0, 0 }, \
561 	{ 0, 0 }, \
562 	{ 0, 0 }, \
563 	{ 0, 0 }, \
564 	{ "divert", CTLTYPE_NODE }, \
565 }
566 
567 /*
568  * Names for IP sysctl objects
569  */
570 #define IPV6CTL_FORWARDING	1	/* act as router */
571 #define IPV6CTL_SENDREDIRECTS	2	/* may send redirects when forwarding*/
572 #define IPV6CTL_DEFHLIM		3	/* default Hop-Limit */
573 #define IPV6CTL_FORWSRCRT	5	/* forward source-routed dgrams */
574 #define IPV6CTL_STATS		6	/* stats */
575 #define IPV6CTL_MRTSTATS	7	/* multicast forwarding stats */
576 #define IPV6CTL_MRTPROTO	8	/* multicast routing protocol */
577 #define IPV6CTL_MAXFRAGPACKETS	9	/* max packets reassembly queue */
578 #define IPV6CTL_SOURCECHECK	10	/* verify source route and intf */
579 #define IPV6CTL_SOURCECHECK_LOGINT 11	/* minimum logging interval */
580 #define IPV6CTL_ACCEPT_RTADV	12
581 #define IPV6CTL_LOG_INTERVAL	14
582 #define IPV6CTL_HDRNESTLIMIT	15
583 #define IPV6CTL_DAD_COUNT	16
584 #define IPV6CTL_AUTO_FLOWLABEL	17
585 #define IPV6CTL_DEFMCASTHLIM	18
586 #define IPV6CTL_USE_DEPRECATED	21	/* use deprecated addr (RFC2462 5.5.4) */
587 /* 24 to 40: reserved */
588 #define IPV6CTL_MAXFRAGS	41	/* max fragments */
589 #define IPV6CTL_MFORWARDING	42
590 #define IPV6CTL_MULTIPATH	43
591 #define IPV6CTL_MCAST_PMTU	44	/* path MTU discovery for multicast */
592 #define IPV6CTL_NEIGHBORGCTHRESH 45
593 #define IPV6CTL_MAXDYNROUTES	48
594 #define IPV6CTL_DAD_PENDING	49
595 #define IPV6CTL_MTUDISCTIMEOUT	50
596 #define IPV6CTL_IFQUEUE		51
597 #define IPV6CTL_MRTMIF		52
598 #define IPV6CTL_MRTMFC		53
599 #define IPV6CTL_SOIIKEY		54
600 #define IPV6CTL_MAXID		55
601 
602 /* New entries should be added here from current IPV6CTL_MAXID value. */
603 /* to define items, should talk with KAME guys first, for *BSD compatibility */
604 
605 #define IPV6CTL_NAMES { \
606 	{ 0, 0 }, \
607 	{ "forwarding", CTLTYPE_INT }, \
608 	{ "redirect", CTLTYPE_INT }, \
609 	{ "hlim", CTLTYPE_INT }, \
610 	{ 0, 0 }, \
611 	{ "forwsrcrt", CTLTYPE_INT }, \
612 	{ 0, 0 }, \
613 	{ 0, 0 }, \
614 	{ "mrtproto", CTLTYPE_INT }, \
615 	{ "maxfragpackets", CTLTYPE_INT }, \
616 	{ "sourcecheck", CTLTYPE_INT }, \
617 	{ "sourcecheck_logint", CTLTYPE_INT }, \
618 	{ 0, 0 }, \
619 	{ 0, 0 }, \
620 	{ "log_interval", CTLTYPE_INT }, \
621 	{ "hdrnestlimit", CTLTYPE_INT }, \
622 	{ "dad_count", CTLTYPE_INT }, \
623 	{ "auto_flowlabel", CTLTYPE_INT }, \
624 	{ "defmcasthlim", CTLTYPE_INT }, \
625 	{ 0, 0 }, \
626 	{ 0, 0 }, \
627 	{ "use_deprecated", CTLTYPE_INT }, \
628 	{ 0, 0 }, \
629 	{ 0, 0 }, \
630 	{ 0, 0 }, \
631 	{ 0, 0 }, \
632 	{ 0, 0 }, \
633 	{ 0, 0 }, \
634 	{ 0, 0 }, \
635 	{ 0, 0 }, \
636 	{ 0, 0 }, \
637 	{ 0, 0 }, \
638 	{ 0, 0 }, \
639 	{ 0, 0 }, \
640 	{ 0, 0 }, \
641 	{ 0, 0 }, \
642 	{ 0, 0 }, \
643 	{ 0, 0 }, \
644 	{ 0, 0 }, \
645 	{ 0, 0 }, \
646 	{ 0, 0 }, \
647 	{ "maxfrags", CTLTYPE_INT }, \
648 	{ "mforwarding", CTLTYPE_INT }, \
649 	{ "multipath", CTLTYPE_INT }, \
650 	{ "multicast_mtudisc", CTLTYPE_INT }, \
651 	{ "neighborgcthresh", CTLTYPE_INT }, \
652 	{ 0, 0 }, \
653 	{ 0, 0 }, \
654 	{ "maxdynroutes", CTLTYPE_INT }, \
655 	{ "dad_pending", CTLTYPE_INT }, \
656 	{ "mtudisctimeout", CTLTYPE_INT }, \
657 	{ "ifq", CTLTYPE_NODE }, \
658 	{ "mrtmif", CTLTYPE_STRUCT }, \
659 	{ "mrtmfc", CTLTYPE_STRUCT }, \
660 	{ "soiikey", CTLTYPE_STRING }, /* binary string */ \
661 }
662 
663 __BEGIN_DECLS
664 struct cmsghdr;
665 
666 extern int inet6_opt_init(void *, socklen_t);
667 extern int inet6_opt_append(void *, socklen_t, int, u_int8_t,
668 		socklen_t, u_int8_t, void **);
669 extern int inet6_opt_finish(void *, socklen_t, int);
670 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
671 
672 extern int inet6_opt_next(void *, socklen_t, int, u_int8_t *,
673 		socklen_t *, void **);
674 extern int inet6_opt_find(void *, socklen_t, int, u_int8_t,
675 		socklen_t *, void **);
676 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
677 
678 extern socklen_t inet6_rth_space(int, int);
679 extern void *inet6_rth_init(void *, socklen_t, int, int);
680 extern int inet6_rth_add(void *, const struct in6_addr *);
681 extern int inet6_rth_reverse(const void *, void *);
682 extern int inet6_rth_segments(const void *);
683 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
684 __END_DECLS
685 #endif /* __BSD_VISIBLE */
686 
687 #endif /* !_NETINET6_IN6_H_ */
688