xref: /freebsd/sys/netinet6/in6.h (revision 59c8e88e72633afbc47a4ace0d2170d00d51f7dc)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the project nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  *
31  *	$KAME: in6.h,v 1.89 2001/05/27 13:28:35 itojun Exp $
32  */
33 
34 /*-
35  * Copyright (c) 1982, 1986, 1990, 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 
63 #ifndef __KAME_NETINET_IN_H_INCLUDED_
64 #error "do not include netinet6/in6.h directly, include netinet/in.h.  see RFC2553"
65 #endif
66 
67 #ifndef _NETINET6_IN6_H_
68 #define _NETINET6_IN6_H_
69 
70 /*
71  * Identification of the network protocol stack
72  * for *BSD-current/release: http://www.kame.net/dev/cvsweb.cgi/kame/COVERAGE
73  * has the table of implementation/integration differences.
74  */
75 #define __KAME__
76 #define __KAME_VERSION		"FreeBSD"
77 
78 /*
79  * IPv6 port allocation rules should mirror the IPv4 rules and are controlled
80  * by the net.inet.ip.portrange sysctl tree. The following defines exist
81  * for compatibility with userland applications that need them.
82  */
83 #if __BSD_VISIBLE
84 #define	IPV6PORT_RESERVED	1024
85 #define	IPV6PORT_ANONMIN	49152
86 #define	IPV6PORT_ANONMAX	65535
87 #define	IPV6PORT_RESERVEDMIN	600
88 #define	IPV6PORT_RESERVEDMAX	(IPV6PORT_RESERVED-1)
89 #endif
90 
91 /*
92  * IPv6 address
93  */
94 struct in6_addr {
95 	union {
96 		uint8_t		__u6_addr8[16];
97 		uint16_t	__u6_addr16[8];
98 		uint32_t	__u6_addr32[4];
99 	} __u6_addr;			/* 128-bit IP6 address */
100 };
101 
102 #define s6_addr   __u6_addr.__u6_addr8
103 #if defined(_KERNEL) || defined(_STANDALONE) /* XXX nonstandard */
104 #define s6_addr8  __u6_addr.__u6_addr8
105 #define s6_addr16 __u6_addr.__u6_addr16
106 #define s6_addr32 __u6_addr.__u6_addr32
107 #endif
108 
109 #define INET6_ADDRSTRLEN	46
110 
111 /*
112  * XXX missing POSIX.1-2001 macro IPPROTO_IPV6.
113  */
114 
115 /*
116  * Socket address for IPv6
117  */
118 #if __BSD_VISIBLE
119 #define SIN6_LEN
120 #endif
121 
122 struct sockaddr_in6 {
123 	uint8_t		sin6_len;	/* length of this struct */
124 	sa_family_t	sin6_family;	/* AF_INET6 */
125 	in_port_t	sin6_port;	/* Transport layer port # */
126 	uint32_t	sin6_flowinfo;	/* IP6 flow information */
127 	struct in6_addr	sin6_addr;	/* IP6 address */
128 	uint32_t	sin6_scope_id;	/* scope zone index */
129 };
130 
131 /*
132  * Local definition for masks
133  */
134 #ifdef _KERNEL	/* XXX nonstandard */
135 #define IN6MASK0	{{{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }}}
136 #define IN6MASK32	{{{ 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, \
137 			    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
138 #define IN6MASK64	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
139 			    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
140 #define IN6MASK96	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
141 			    0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 }}}
142 #define IN6MASK128	{{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
143 			    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
144 #endif
145 
146 #ifdef _KERNEL
147 extern const struct sockaddr_in6 sa6_any;
148 
149 extern const struct in6_addr in6mask0;
150 extern const struct in6_addr in6mask32;
151 extern const struct in6_addr in6mask64;
152 extern const struct in6_addr in6mask96;
153 extern const struct in6_addr in6mask128;
154 #endif /* _KERNEL */
155 
156 /*
157  * Macros started with IPV6_ADDR is KAME local
158  */
159 #ifdef _KERNEL	/* XXX nonstandard */
160 #if _BYTE_ORDER == _BIG_ENDIAN
161 #define IPV6_ADDR_INT32_ONE	1
162 #define IPV6_ADDR_INT32_TWO	2
163 #define IPV6_ADDR_INT32_MNL	0xff010000
164 #define IPV6_ADDR_INT32_MLL	0xff020000
165 #define IPV6_ADDR_INT32_SMP	0x0000ffff
166 #define IPV6_ADDR_INT16_ULL	0xfe80
167 #define IPV6_ADDR_INT16_USL	0xfec0
168 #define IPV6_ADDR_INT16_MLL	0xff02
169 #elif _BYTE_ORDER == _LITTLE_ENDIAN
170 #define IPV6_ADDR_INT32_ONE	0x01000000
171 #define IPV6_ADDR_INT32_TWO	0x02000000
172 #define IPV6_ADDR_INT32_MNL	0x000001ff
173 #define IPV6_ADDR_INT32_MLL	0x000002ff
174 #define IPV6_ADDR_INT32_SMP	0xffff0000
175 #define IPV6_ADDR_INT16_ULL	0x80fe
176 #define IPV6_ADDR_INT16_USL	0xc0fe
177 #define IPV6_ADDR_INT16_MLL	0x02ff
178 #endif
179 #endif
180 
181 /*
182  * Definition of some useful macros to handle IP6 addresses
183  */
184 #if __BSD_VISIBLE
185 #define IN6ADDR_ANY_INIT \
186 	{{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
187 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}}
188 #define IN6ADDR_LOOPBACK_INIT \
189 	{{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
190 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
191 #define IN6ADDR_NODELOCAL_ALLNODES_INIT \
192 	{{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
193 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
194 #define IN6ADDR_INTFACELOCAL_ALLNODES_INIT \
195 	{{{ 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
196 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
197 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
198 	{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
199 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
200 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
201 	{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
202 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
203 #define IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT \
204 	{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
205 	    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16 }}}
206 #endif
207 
208 extern const struct in6_addr in6addr_any;
209 extern const struct in6_addr in6addr_loopback;
210 #if __BSD_VISIBLE
211 extern const struct in6_addr in6addr_nodelocal_allnodes;
212 extern const struct in6_addr in6addr_linklocal_allnodes;
213 extern const struct in6_addr in6addr_linklocal_allrouters;
214 extern const struct in6_addr in6addr_linklocal_allv2routers;
215 #endif
216 
217 /*
218  * Equality
219  */
220 #if __BSD_VISIBLE
221 #define IN6_ARE_ADDR_EQUAL(a, b)			\
222     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)
223 #endif
224 
225 /*
226  * Unspecified
227  */
228 #define IN6_IS_ADDR_UNSPECIFIED(a)	\
229 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
230 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
231 	 (a)->__u6_addr.__u6_addr32[2] == 0 &&	\
232 	 (a)->__u6_addr.__u6_addr32[3] == 0)
233 
234 /*
235  * Loopback
236  */
237 #define IN6_IS_ADDR_LOOPBACK(a)		\
238 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
239 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
240 	 (a)->__u6_addr.__u6_addr32[2] == 0 &&	\
241 	 (a)->__u6_addr.__u6_addr32[3] == ntohl(1))
242 
243 /*
244  * IPv4 compatible
245  */
246 #define IN6_IS_ADDR_V4COMPAT(a)		\
247 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
248 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
249 	 (a)->__u6_addr.__u6_addr32[2] == 0 &&	\
250 	 (a)->__u6_addr.__u6_addr32[3] != 0 &&	\
251 	 (a)->__u6_addr.__u6_addr32[3] != ntohl(1))
252 
253 /*
254  * Mapped
255  */
256 #define IN6_IS_ADDR_V4MAPPED(a)		      \
257 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
258 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
259 	 (a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))
260 
261 /*
262  * KAME Scope Values
263  */
264 
265 #ifdef _KERNEL	/* XXX nonstandard */
266 #define IPV6_ADDR_SCOPE_NODELOCAL	0x01
267 #define IPV6_ADDR_SCOPE_INTFACELOCAL	0x01
268 #define IPV6_ADDR_SCOPE_LINKLOCAL	0x02
269 #define IPV6_ADDR_SCOPE_SITELOCAL	0x05
270 #define IPV6_ADDR_SCOPE_ORGLOCAL	0x08	/* just used in this file */
271 #define IPV6_ADDR_SCOPE_GLOBAL		0x0e
272 #else
273 #define __IPV6_ADDR_SCOPE_NODELOCAL	0x01
274 #define __IPV6_ADDR_SCOPE_INTFACELOCAL	0x01
275 #define __IPV6_ADDR_SCOPE_LINKLOCAL	0x02
276 #define __IPV6_ADDR_SCOPE_SITELOCAL	0x05
277 #define __IPV6_ADDR_SCOPE_ORGLOCAL	0x08	/* just used in this file */
278 #define __IPV6_ADDR_SCOPE_GLOBAL	0x0e
279 #endif
280 
281 /*
282  * Unicast Scope
283  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
284  */
285 #define IN6_IS_ADDR_LINKLOCAL(a)	\
286 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
287 #define IN6_IS_ADDR_SITELOCAL(a)	\
288 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
289 
290 /*
291  * Multicast
292  */
293 #define IN6_IS_ADDR_MULTICAST(a)	((a)->s6_addr[0] == 0xff)
294 
295 #ifdef _KERNEL	/* XXX nonstandard */
296 #define IPV6_ADDR_MC_SCOPE(a)		((a)->s6_addr[1] & 0x0f)
297 #else
298 #define __IPV6_ADDR_MC_SCOPE(a)		((a)->s6_addr[1] & 0x0f)
299 #endif
300 
301 /*
302  * Multicast Scope
303  */
304 #ifdef _KERNEL	/* refers nonstandard items */
305 #define IN6_IS_ADDR_MC_NODELOCAL(a)	\
306 	(IN6_IS_ADDR_MULTICAST(a) &&	\
307 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
308 #define IN6_IS_ADDR_MC_INTFACELOCAL(a)	\
309 	(IN6_IS_ADDR_MULTICAST(a) &&	\
310 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_INTFACELOCAL))
311 #define IN6_IS_ADDR_MC_LINKLOCAL(a)	\
312 	(IN6_IS_ADDR_MULTICAST(a) &&	\
313 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
314 #define IN6_IS_ADDR_MC_SITELOCAL(a)	\
315 	(IN6_IS_ADDR_MULTICAST(a) &&	\
316 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_SITELOCAL))
317 #define IN6_IS_ADDR_MC_ORGLOCAL(a)	\
318 	(IN6_IS_ADDR_MULTICAST(a) &&	\
319 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
320 #define IN6_IS_ADDR_MC_GLOBAL(a)	\
321 	(IN6_IS_ADDR_MULTICAST(a) &&	\
322 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
323 #else
324 #define IN6_IS_ADDR_MC_NODELOCAL(a)	\
325 	(IN6_IS_ADDR_MULTICAST(a) &&	\
326 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_NODELOCAL))
327 #define IN6_IS_ADDR_MC_LINKLOCAL(a)	\
328 	(IN6_IS_ADDR_MULTICAST(a) &&	\
329 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_LINKLOCAL))
330 #define IN6_IS_ADDR_MC_SITELOCAL(a)	\
331 	(IN6_IS_ADDR_MULTICAST(a) &&	\
332 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_SITELOCAL))
333 #define IN6_IS_ADDR_MC_ORGLOCAL(a)	\
334 	(IN6_IS_ADDR_MULTICAST(a) &&	\
335 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_ORGLOCAL))
336 #define IN6_IS_ADDR_MC_GLOBAL(a)	\
337 	(IN6_IS_ADDR_MULTICAST(a) &&	\
338 	 (__IPV6_ADDR_MC_SCOPE(a) == __IPV6_ADDR_SCOPE_GLOBAL))
339 #endif
340 
341 #ifdef _KERNEL	/* nonstandard */
342 /*
343  * KAME Scope
344  */
345 #define IN6_IS_SCOPE_LINKLOCAL(a)	\
346 	((IN6_IS_ADDR_LINKLOCAL(a)) ||	\
347 	 (IN6_IS_ADDR_MC_LINKLOCAL(a)))
348 #define	IN6_IS_SCOPE_EMBED(a)			\
349 	((IN6_IS_ADDR_LINKLOCAL(a)) ||		\
350 	 (IN6_IS_ADDR_MC_LINKLOCAL(a)) ||	\
351 	 (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
352 
353 #define IFA6_IS_DEPRECATED(a) \
354 	((a)->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME && \
355 	 (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
356 	 (a)->ia6_lifetime.ia6t_pltime)
357 #define IFA6_IS_INVALID(a) \
358 	((a)->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME && \
359 	 (u_int32_t)((time_uptime - (a)->ia6_updatetime)) > \
360 	 (a)->ia6_lifetime.ia6t_vltime)
361 #endif /* _KERNEL */
362 
363 /*
364  * IP6 route structure
365  */
366 #if __BSD_VISIBLE
367 struct nhop_object;
368 struct route_in6 {
369 	struct nhop_object *ro_nh;
370 	struct	llentry *ro_lle;
371 	/*
372 	 * ro_prepend and ro_plen are only used for bpf to pass in a
373 	 * preformed header.  They are not cacheable.
374 	 */
375 	char		*ro_prepend;
376 	uint16_t	ro_plen;
377 	uint16_t	ro_flags;
378 	uint16_t	ro_mtu;	/* saved ro_rt mtu */
379 	uint16_t	spare;
380 	struct	sockaddr_in6 ro_dst;
381 };
382 #endif
383 
384 #ifdef _KERNEL
385 #define MTAG_ABI_IPV6		1444287380	/* IPv6 ABI */
386 #define IPV6_TAG_DIRECT		0		/* direct-dispatch IPv6 */
387 #endif /* _KERNEL */
388 
389 /*
390  * Options for use with [gs]etsockopt at the IPV6 level.
391  * First word of comment is data type; bool is stored in int.
392  */
393 /* no hdrincl */
394 #if 0 /* the followings are relic in IPv4 and hence are disabled */
395 #define IPV6_OPTIONS		1  /* buf/ip6_opts; set/get IP6 options */
396 #define IPV6_RECVOPTS		5  /* bool; receive all IP6 opts w/dgram */
397 #define IPV6_RECVRETOPTS	6  /* bool; receive IP6 opts for response */
398 #define IPV6_RECVDSTADDR	7  /* bool; receive IP6 dst addr w/dgram */
399 #define IPV6_RETOPTS		8  /* ip6_opts; set/get IP6 options */
400 #endif
401 #define IPV6_SOCKOPT_RESERVED1	3  /* reserved for future use */
402 #define IPV6_UNICAST_HOPS	4  /* int; IP6 hops */
403 #define IPV6_MULTICAST_IF	9  /* u_int; set/get IP6 multicast i/f  */
404 #define IPV6_MULTICAST_HOPS	10 /* int; set/get IP6 multicast hops */
405 #define IPV6_MULTICAST_LOOP	11 /* u_int; set/get IP6 multicast loopback */
406 #define IPV6_JOIN_GROUP		12 /* ipv6_mreq; join a group membership */
407 #define IPV6_LEAVE_GROUP	13 /* ipv6_mreq; leave a group membership */
408 #define IPV6_PORTRANGE		14 /* int; range to choose for unspec port */
409 #define ICMP6_FILTER		18 /* icmp6_filter; icmp6 filter */
410 /* RFC2292 options */
411 #ifdef _KERNEL
412 #define IPV6_2292PKTINFO	19 /* bool; send/recv if, src/dst addr */
413 #define IPV6_2292HOPLIMIT	20 /* bool; hop limit */
414 #define IPV6_2292NEXTHOP	21 /* bool; next hop addr */
415 #define IPV6_2292HOPOPTS	22 /* bool; hop-by-hop option */
416 #define IPV6_2292DSTOPTS	23 /* bool; destinaion option */
417 #define IPV6_2292RTHDR		24 /* bool; routing header */
418 #define IPV6_2292PKTOPTIONS	25 /* buf/cmsghdr; set/get IPv6 options */
419 #endif
420 
421 #define IPV6_CHECKSUM		26 /* int; checksum offset for raw socket */
422 #define IPV6_V6ONLY		27 /* bool; make AF_INET6 sockets v6 only */
423 #ifndef _KERNEL
424 #define IPV6_BINDV6ONLY		IPV6_V6ONLY
425 #endif
426 
427 #define IPV6_IPSEC_POLICY	28 /* struct; get/set security policy */
428 				   /* 29; unused; was IPV6_FAITH */
429 #if 1 /* IPV6FIREWALL */
430 #define IPV6_FW_ADD		30 /* add a firewall rule to chain */
431 #define IPV6_FW_DEL		31 /* delete a firewall rule from chain */
432 #define IPV6_FW_FLUSH		32 /* flush firewall rule chain */
433 #define IPV6_FW_ZERO		33 /* clear single/all firewall counter(s) */
434 #define IPV6_FW_GET		34 /* get entire firewall rule chain */
435 #endif
436 
437 /* new socket options introduced in RFC3542 */
438 #define IPV6_RTHDRDSTOPTS	35 /* ip6_dest; send dst option before rthdr */
439 
440 #define IPV6_RECVPKTINFO	36 /* bool; recv if, dst addr */
441 #define IPV6_RECVHOPLIMIT	37 /* bool; recv hop limit */
442 #define IPV6_RECVRTHDR		38 /* bool; recv routing header */
443 #define IPV6_RECVHOPOPTS	39 /* bool; recv hop-by-hop option */
444 #define IPV6_RECVDSTOPTS	40 /* bool; recv dst option after rthdr */
445 #ifdef _KERNEL
446 #define IPV6_RECVRTHDRDSTOPTS	41 /* bool; recv dst option before rthdr */
447 #endif
448 
449 #define IPV6_USE_MIN_MTU	42 /* bool; send packets at the minimum MTU */
450 #define IPV6_RECVPATHMTU	43 /* bool; notify an according MTU */
451 
452 #define IPV6_PATHMTU		44 /* mtuinfo; get the current path MTU (sopt),
453 				      4 bytes int; MTU notification (cmsg) */
454 #if 0 /*obsoleted during 2292bis -> 3542*/
455 #define IPV6_REACHCONF		45 /* no data; ND reachability confirm
456 				      (cmsg only/not in of RFC3542) */
457 #endif
458 
459 /* more new socket options introduced in RFC3542 */
460 #define IPV6_PKTINFO		46 /* in6_pktinfo; send if, src addr */
461 #define IPV6_HOPLIMIT		47 /* int; send hop limit */
462 #define IPV6_NEXTHOP		48 /* sockaddr; next hop addr */
463 #define IPV6_HOPOPTS		49 /* ip6_hbh; send hop-by-hop option */
464 #define IPV6_DSTOPTS		50 /* ip6_dest; send dst option befor rthdr */
465 #define IPV6_RTHDR		51 /* ip6_rthdr; send routing header */
466 #if 0
467 #define IPV6_PKTOPTIONS		52 /* buf/cmsghdr; set/get IPv6 options */
468 				   /* obsoleted by RFC3542 */
469 #endif
470 
471 #define IPV6_RECVTCLASS		57 /* bool; recv traffic class values */
472 
473 #define IPV6_AUTOFLOWLABEL	59 /* bool; attach flowlabel automagically */
474 
475 #define IPV6_TCLASS		61 /* int; send traffic class value */
476 #define IPV6_DONTFRAG		62 /* bool; disable IPv6 fragmentation */
477 
478 #define IPV6_PREFER_TEMPADDR	63 /* int; prefer temporary addresses as
479 				    * the source address.
480 				    */
481 
482 #define	IPV6_BINDANY		64 /* bool: allow bind to any address */
483 				   /* unused; was IPV6_BIND_MULTI */
484 				   /* unused; was IPV6_RSS_LISTEN_BUCKET */
485 #define	IPV6_FLOWID		67 /* int; flowid of given socket */
486 #define	IPV6_FLOWTYPE		68 /* int; flowtype of given socket */
487 #define	IPV6_RSSBUCKETID	69 /* int; RSS bucket ID of given socket */
488 #define	IPV6_RECVFLOWID		70 /* bool; receive IP6 flowid/flowtype w/ datagram */
489 #define	IPV6_RECVRSSBUCKETID	71 /* bool; receive IP6 RSS bucket id w/ datagram */
490 
491 #define	IPV6_ORIGDSTADDR	72 /* bool: allow getting dstaddr /port info */
492 #define	IPV6_RECVORIGDSTADDR	IPV6_ORIGDSTADDR
493 
494 /*
495  * The following option is private; do not use it from user applications.
496  * It is deliberately defined to the same value as IP_MSFILTER.
497  */
498 #define	IPV6_MSFILTER		74 /* struct __msfilterreq;
499 				    * set/get multicast source filter list.
500 				    */
501 
502 /* The following option deals with the 802.1Q Ethernet Priority Code Point */
503 #define	IPV6_VLAN_PCP		75  /* int; set/get PCP used for packet, */
504 				    /*      -1 use interface default */
505 
506 /* to define items, should talk with KAME guys first, for *BSD compatibility */
507 
508 #define IPV6_RTHDR_LOOSE     0 /* this hop need not be a neighbor. XXX old spec */
509 #define IPV6_RTHDR_STRICT    1 /* this hop must be a neighbor. XXX old spec */
510 #define IPV6_RTHDR_TYPE_0    0 /* IPv6 routing header type 0 */
511 
512 /*
513  * Defaults and limits for options
514  */
515 #define IPV6_DEFAULT_MULTICAST_HOPS 1	/* normally limit m'casts to 1 hop */
516 #define IPV6_DEFAULT_MULTICAST_LOOP 1	/* normally hear sends if a member */
517 
518 /*
519  * Limit for IPv6 multicast memberships
520  */
521 #define	IPV6_MAX_MEMBERSHIPS	4095
522 
523 /*
524  * Default resource limits for IPv6 multicast source filtering.
525  * These may be modified by sysctl.
526  */
527 #define	IPV6_MAX_GROUP_SRC_FILTER	512	/* sources per group */
528 #define	IPV6_MAX_SOCK_SRC_FILTER	128	/* sources per socket/group */
529 
530 /*
531  * Argument structure for IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP.
532  */
533 struct ipv6_mreq {
534 	struct in6_addr	ipv6mr_multiaddr;
535 	unsigned int	ipv6mr_interface;
536 };
537 
538 /*
539  * IPV6_PKTINFO: Packet information(RFC2292 sec 5)
540  */
541 struct in6_pktinfo {
542 	struct in6_addr	ipi6_addr;	/* src/dst IPv6 address */
543 	unsigned int	ipi6_ifindex;	/* send/recv interface index */
544 };
545 
546 /*
547  * Control structure for IPV6_RECVPATHMTU socket option.
548  */
549 struct ip6_mtuinfo {
550 	struct sockaddr_in6 ip6m_addr;	/* or sockaddr_storage? */
551 	uint32_t ip6m_mtu;
552 };
553 
554 /*
555  * Argument for IPV6_PORTRANGE:
556  * - which range to search when port is unspecified at bind() or connect()
557  */
558 #define	IPV6_PORTRANGE_DEFAULT	0	/* default range */
559 #define	IPV6_PORTRANGE_HIGH	1	/* "high" - request firewall bypass */
560 #define	IPV6_PORTRANGE_LOW	2	/* "low" - vouchsafe security */
561 
562 #if __BSD_VISIBLE
563 /*
564  * Definitions for inet6 sysctl operations.
565  *
566  * Third level is protocol number.
567  * Fourth level is desired variable within that protocol.
568  */
569 #define IPV6PROTO_MAXID	(IPPROTO_PIM + 1)	/* don't list to IPV6PROTO_MAX */
570 
571 /*
572  * Names for IP sysctl objects
573  */
574 #define IPV6CTL_FORWARDING	1	/* act as router */
575 #define IPV6CTL_SENDREDIRECTS	2	/* may send redirects when forwarding*/
576 #define IPV6CTL_DEFHLIM		3	/* default Hop-Limit */
577 #ifdef notyet
578 #define IPV6CTL_DEFMTU		4	/* default MTU */
579 #endif
580 #define IPV6CTL_FORWSRCRT	5	/* forward source-routed dgrams */
581 #define IPV6CTL_STATS		6	/* stats */
582 #define IPV6CTL_MRTSTATS	7	/* multicast forwarding stats */
583 #define IPV6CTL_MRTPROTO	8	/* multicast routing protocol */
584 #define IPV6CTL_MAXFRAGPACKETS	9	/* max packets reassembly queue */
585 #define IPV6CTL_SOURCECHECK	10	/* verify source route and intf */
586 #define IPV6CTL_SOURCECHECK_LOGINT 11	/* minimume logging interval */
587 #define IPV6CTL_ACCEPT_RTADV	12
588 					/* 13; unused; was: IPV6CTL_KEEPFAITH */
589 #define IPV6CTL_LOG_INTERVAL	14
590 #define IPV6CTL_HDRNESTLIMIT	15
591 #define IPV6CTL_DAD_COUNT	16
592 #define IPV6CTL_AUTO_FLOWLABEL	17
593 #define IPV6CTL_DEFMCASTHLIM	18
594 #define IPV6CTL_GIF_HLIM	19	/* default HLIM for gif encap packet */
595 #define IPV6CTL_KAME_VERSION	20
596 #define IPV6CTL_USE_DEPRECATED	21	/* use deprecated addr (RFC2462 5.5.4) */
597 #define IPV6CTL_RR_PRUNE	22	/* walk timer for router renumbering */
598 #if 0	/* obsolete */
599 #define IPV6CTL_MAPPED_ADDR	23
600 #endif
601 #define IPV6CTL_V6ONLY		24
602 /*	IPV6CTL_RTEXPIRE	25	deprecated */
603 /*	IPV6CTL_RTMINEXPIRE	26	deprecated */
604 /*	IPV6CTL_RTMAXCACHE	27	deprecated */
605 
606 #define IPV6CTL_USETEMPADDR	32	/* use temporary addresses (RFC3041) */
607 #define IPV6CTL_TEMPPLTIME	33	/* preferred lifetime for tmpaddrs */
608 #define IPV6CTL_TEMPVLTIME	34	/* valid lifetime for tmpaddrs */
609 #define IPV6CTL_AUTO_LINKLOCAL	35	/* automatic link-local addr assign */
610 #define IPV6CTL_RIP6STATS	36	/* raw_ip6 stats */
611 #define IPV6CTL_PREFER_TEMPADDR	37	/* prefer temporary addr as src */
612 #define IPV6CTL_ADDRCTLPOLICY	38	/* get/set address selection policy */
613 #define IPV6CTL_USE_DEFAULTZONE	39	/* use default scope zone */
614 
615 #define IPV6CTL_MAXFRAGS	41	/* max fragments */
616 #if 0
617 #define IPV6CTL_IFQ		42	/* ip6intrq node */
618 #define IPV6CTL_ISATAPRTR	43	/* isatap router */
619 #endif
620 #define IPV6CTL_MCAST_PMTU	44	/* enable pMTU discovery for multicast? */
621 
622 /* New entries should be added here from current IPV6CTL_MAXID value. */
623 /* to define items, should talk with KAME guys first, for *BSD compatibility */
624 #define IPV6CTL_STEALTH		45
625 
626 #define	ICMPV6CTL_ND6_ONLINKNSRFC4861	47
627 #define	IPV6CTL_NO_RADR		48	/* No defroute from RA */
628 #define	IPV6CTL_NORBIT_RAIF	49	/* Disable R-bit in NA on RA
629 					 * receiving IF. */
630 #define	IPV6CTL_RFC6204W3	50	/* Accept defroute even when forwarding
631 					   enabled */
632 #define	IPV6CTL_INTRQMAXLEN	51	/* max length of IPv6 netisr queue */
633 #define	IPV6CTL_INTRDQMAXLEN	52	/* max length of direct IPv6 netisr
634 					 * queue */
635 #define	IPV6CTL_MAXFRAGSPERPACKET	53 /* Max fragments per packet */
636 #define	IPV6CTL_MAXFRAGBUCKETSIZE	54 /* Max reassembly queues per bucket */
637 #define	IPV6CTL_MAXID		55
638 #endif /* __BSD_VISIBLE */
639 
640 /*
641  * Since both netinet/ and netinet6/ call into netipsec/ and netpfil/,
642  * the protocol specific mbuf flags are shared between them.
643  */
644 #define	M_FASTFWD_OURS		M_PROTO1	/* changed dst to local */
645 #define	M_IP6_NEXTHOP		M_PROTO2	/* explicit ip nexthop */
646 #define	M_IP_NEXTHOP		M_PROTO2	/* explicit ip nexthop */
647 #define	M_SKIP_FIREWALL		M_PROTO3	/* skip firewall processing */
648 #define	M_AUTHIPHDR		M_PROTO4
649 #define	M_DECRYPTED		M_PROTO5
650 #define	M_LOOP			M_PROTO6
651 #define	M_AUTHIPDGM		M_PROTO7
652 #define	M_RTALERT_MLD		M_PROTO8
653 #define	M_FRAGMENTED		M_PROTO9	/* contained fragment header */
654 
655 #ifdef _KERNEL
656 struct cmsghdr;
657 struct ip6_hdr;
658 
659 int	in6_cksum(struct mbuf *, uint8_t, uint32_t, uint32_t);
660 int	in6_cksum_partial(struct mbuf *, uint8_t, uint32_t, uint32_t, uint32_t);
661 int	in6_cksum_pseudo(struct ip6_hdr *, uint32_t, uint8_t, uint16_t);
662 
663 int	in6_localaddr(struct in6_addr *);
664 int	in6_localip(struct in6_addr *);
665 bool	in6_localip_fib(struct in6_addr *, uint16_t);
666 int	in6_ifhasaddr(struct ifnet *, struct in6_addr *);
667 int	in6_addrscope(const struct in6_addr *);
668 char	*ip6_sprintf(char *, const struct in6_addr *);
669 struct	in6_ifaddr *in6_ifawithifp(struct ifnet *, struct in6_addr *);
670 extern void in6_if_up(struct ifnet *);
671 struct sockaddr;
672 
673 void	in6_sin6_2_sin(struct sockaddr_in *sin,
674 			    struct sockaddr_in6 *sin6);
675 void	in6_sin_2_v4mapsin6(struct sockaddr_in *sin,
676 				 struct sockaddr_in6 *sin6);
677 void	in6_sin6_2_sin_in_sock(struct sockaddr *nam);
678 extern void addrsel_policy_init(void);
679 
680 #define	satosin6(sa)	((struct sockaddr_in6 *)(sa))
681 #define	sin6tosa(sin6)	((struct sockaddr *)(sin6))
682 #define	ifatoia6(ifa)	((struct in6_ifaddr *)(ifa))
683 
684 #endif /* _KERNEL */
685 
686 #ifndef _SIZE_T_DECLARED
687 typedef	__size_t	size_t;
688 #define	_SIZE_T_DECLARED
689 #endif
690 
691 #ifndef _SOCKLEN_T_DECLARED
692 typedef	__socklen_t	socklen_t;
693 #define	_SOCKLEN_T_DECLARED
694 #endif
695 
696 #if __BSD_VISIBLE
697 
698 __BEGIN_DECLS
699 struct cmsghdr;
700 
701 extern int inet6_option_space(int);
702 extern int inet6_option_init(void *, struct cmsghdr **, int);
703 extern int inet6_option_append(struct cmsghdr *, const uint8_t *,
704 	int, int);
705 extern uint8_t *inet6_option_alloc(struct cmsghdr *, int, int, int);
706 extern int inet6_option_next(const struct cmsghdr *, uint8_t **);
707 extern int inet6_option_find(const struct cmsghdr *, uint8_t **, int);
708 
709 extern size_t inet6_rthdr_space(int, int);
710 extern struct cmsghdr *inet6_rthdr_init(void *, int);
711 extern int inet6_rthdr_add(struct cmsghdr *, const struct in6_addr *,
712 	unsigned int);
713 extern int inet6_rthdr_lasthop(struct cmsghdr *, unsigned int);
714 #if 0 /* not implemented yet */
715 extern int inet6_rthdr_reverse(const struct cmsghdr *, struct cmsghdr *);
716 #endif
717 extern int inet6_rthdr_segments(const struct cmsghdr *);
718 extern struct in6_addr *inet6_rthdr_getaddr(struct cmsghdr *, int);
719 extern int inet6_rthdr_getflags(const struct cmsghdr *, int);
720 
721 extern int inet6_opt_init(void *, socklen_t);
722 extern int inet6_opt_append(void *, socklen_t, int, uint8_t, socklen_t,
723 	uint8_t, void **);
724 extern int inet6_opt_finish(void *, socklen_t, int);
725 extern int inet6_opt_set_val(void *, int, void *, socklen_t);
726 
727 extern int inet6_opt_next(void *, socklen_t, int, uint8_t *, socklen_t *,
728 	void **);
729 extern int inet6_opt_find(void *, socklen_t, int, uint8_t, socklen_t *,
730 	void **);
731 extern int inet6_opt_get_val(void *, int, void *, socklen_t);
732 extern socklen_t inet6_rth_space(int, int);
733 extern void *inet6_rth_init(void *, socklen_t, int, int);
734 extern int inet6_rth_add(void *, const struct in6_addr *);
735 extern int inet6_rth_reverse(const void *, void *);
736 extern int inet6_rth_segments(const void *);
737 extern struct in6_addr *inet6_rth_getaddr(const void *, int);
738 __END_DECLS
739 
740 #endif /* __BSD_VISIBLE */
741 
742 #endif /* !_NETINET6_IN6_H_ */
743