xref: /freebsd/sys/netinet6/in6_proto.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the project nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  *	$KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $
30  */
31 
32 /*-
33  * Copyright (c) 1982, 1986, 1993
34  *	The Regents of the University of California.  All rights reserved.
35  *
36  * Redistribution and use in source and binary forms, with or without
37  * modification, are permitted provided that the following conditions
38  * are met:
39  * 1. Redistributions of source code must retain the above copyright
40  *    notice, this list of conditions and the following disclaimer.
41  * 2. Redistributions in binary form must reproduce the above copyright
42  *    notice, this list of conditions and the following disclaimer in the
43  *    documentation and/or other materials provided with the distribution.
44  * 4. Neither the name of the University nor the names of its contributors
45  *    may be used to endorse or promote products derived from this software
46  *    without specific prior written permission.
47  *
48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58  * SUCH DAMAGE.
59  *
60  *	@(#)in_proto.c	8.1 (Berkeley) 6/10/93
61  */
62 
63 #include <sys/cdefs.h>
64 __FBSDID("$FreeBSD$");
65 
66 #include "opt_inet.h"
67 #include "opt_inet6.h"
68 #include "opt_ipsec.h"
69 #include "opt_ipstealth.h"
70 #include "opt_carp.h"
71 #include "opt_sctp.h"
72 
73 #include <sys/param.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/protosw.h>
77 #include <sys/kernel.h>
78 #include <sys/domain.h>
79 #include <sys/mbuf.h>
80 #include <sys/systm.h>
81 #include <sys/sysctl.h>
82 
83 #include <net/if.h>
84 #include <net/radix.h>
85 #include <net/route.h>
86 
87 #include <netinet/in.h>
88 #include <netinet/in_systm.h>
89 #include <netinet/in_var.h>
90 #include <netinet/ip_encap.h>
91 #include <netinet/ip.h>
92 #include <netinet/ip_var.h>
93 #include <netinet/ip6.h>
94 #include <netinet6/ip6_var.h>
95 #include <netinet/icmp6.h>
96 
97 #include <netinet/tcp.h>
98 #include <netinet/tcp_timer.h>
99 #include <netinet/tcp_var.h>
100 #include <netinet/udp.h>
101 #include <netinet/udp_var.h>
102 #include <netinet6/tcp6_var.h>
103 #include <netinet6/raw_ip6.h>
104 #include <netinet6/udp6_var.h>
105 #include <netinet6/pim6_var.h>
106 #include <netinet6/nd6.h>
107 
108 #ifdef DEV_CARP
109 #include <netinet/ip_carp.h>
110 #endif
111 
112 #ifdef SCTP
113 #include <netinet/in_pcb.h>
114 #include <netinet/sctp_pcb.h>
115 #include <netinet/sctp.h>
116 #include <netinet/sctp_var.h>
117 #include <netinet6/sctp6_var.h>
118 #endif /* SCTP */
119 
120 #ifdef IPSEC
121 #include <netipsec/ipsec.h>
122 #include <netipsec/ipsec6.h>
123 #endif /* IPSEC */
124 
125 #include <netinet6/ip6protosw.h>
126 
127 /*
128  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
129  */
130 
131 extern	struct domain inet6domain;
132 static	struct pr_usrreqs nousrreqs;
133 
134 #define PR_LISTEN	0
135 #define PR_ABRTACPTDIS	0
136 
137 struct ip6protosw inet6sw[] = {
138 {
139 	.pr_type =		0,
140 	.pr_domain =		&inet6domain,
141 	.pr_protocol =		IPPROTO_IPV6,
142 	.pr_init =		ip6_init,
143 	.pr_slowtimo =		frag6_slowtimo,
144 	.pr_drain =		frag6_drain,
145 	.pr_usrreqs =		&nousrreqs,
146 },
147 {
148 	.pr_type =		SOCK_DGRAM,
149 	.pr_domain =		&inet6domain,
150 	.pr_protocol =		IPPROTO_UDP,
151 	.pr_flags =		PR_ATOMIC|PR_ADDR,
152 	.pr_input =		udp6_input,
153 	.pr_ctlinput =		udp6_ctlinput,
154 	.pr_ctloutput =		ip6_ctloutput,
155 	.pr_usrreqs =		&udp6_usrreqs,
156 },
157 {
158 	.pr_type =		SOCK_STREAM,
159 	.pr_domain =		&inet6domain,
160 	.pr_protocol =		IPPROTO_TCP,
161 	.pr_flags =		PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
162 	.pr_input =		tcp6_input,
163 	.pr_ctlinput =		tcp6_ctlinput,
164 	.pr_ctloutput =		tcp_ctloutput,
165 #ifndef INET	/* don't call initialization and timeout routines twice */
166 	.pr_init =		tcp_init,
167 	.pr_fasttimo =		tcp_fasttimo,
168 	.pr_slowtimo =		tcp_slowtimo,
169 #endif
170 	.pr_drain =		tcp_drain,
171 	.pr_usrreqs =		&tcp6_usrreqs,
172 },
173 #ifdef SCTP
174 {
175 	.pr_type =	SOCK_DGRAM,
176 	.pr_domain =	&inet6domain,
177         .pr_protocol =	IPPROTO_SCTP,
178         .pr_flags =	PR_WANTRCVD,
179         .pr_input =	sctp6_input,
180         .pr_ctlinput =  sctp6_ctlinput,
181         .pr_ctloutput = sctp_ctloutput,
182         .pr_drain =	sctp_drain,
183         .pr_usrreqs =	&sctp6_usrreqs
184 },
185 {
186 	.pr_type =	SOCK_SEQPACKET,
187 	.pr_domain =	&inet6domain,
188         .pr_protocol =	IPPROTO_SCTP,
189         .pr_flags =	PR_WANTRCVD,
190         .pr_input =	sctp6_input,
191         .pr_ctlinput =  sctp6_ctlinput,
192         .pr_ctloutput = sctp_ctloutput,
193         .pr_drain =	sctp_drain,
194         .pr_usrreqs =	&sctp6_usrreqs
195 },
196 
197 {
198 	.pr_type =	SOCK_STREAM,
199 	.pr_domain =	&inet6domain,
200         .pr_protocol =	IPPROTO_SCTP,
201         .pr_flags =	PR_WANTRCVD,
202         .pr_input =	sctp6_input,
203         .pr_ctlinput =  sctp6_ctlinput,
204         .pr_ctloutput = sctp_ctloutput,
205         .pr_drain =	sctp_drain,
206         .pr_usrreqs =	&sctp6_usrreqs
207 },
208 #endif /* SCTP */
209 {
210 	.pr_type =		SOCK_RAW,
211 	.pr_domain =		&inet6domain,
212 	.pr_protocol =		IPPROTO_RAW,
213 	.pr_flags =		PR_ATOMIC|PR_ADDR,
214 	.pr_input =		rip6_input,
215 	.pr_output =		rip6_output,
216 	.pr_ctlinput =		rip6_ctlinput,
217 	.pr_ctloutput =		rip6_ctloutput,
218 	.pr_usrreqs =		&rip6_usrreqs
219 },
220 {
221 	.pr_type =		SOCK_RAW,
222 	.pr_domain =		&inet6domain,
223 	.pr_protocol =		IPPROTO_ICMPV6,
224 	.pr_flags =		PR_ATOMIC|PR_ADDR|PR_LASTHDR,
225 	.pr_input =		icmp6_input,
226 	.pr_output =		rip6_output,
227 	.pr_ctlinput =		rip6_ctlinput,
228 	.pr_ctloutput =		rip6_ctloutput,
229 	.pr_init =		icmp6_init,
230 	.pr_fasttimo =		icmp6_fasttimo,
231 	.pr_usrreqs =		&rip6_usrreqs
232 },
233 {
234 	.pr_type =		SOCK_RAW,
235 	.pr_domain =		&inet6domain,
236 	.pr_protocol =		IPPROTO_DSTOPTS,
237 	.pr_flags =		PR_ATOMIC|PR_ADDR,
238 	.pr_input =		dest6_input,
239 	.pr_usrreqs =		&nousrreqs
240 },
241 {
242 	.pr_type =		SOCK_RAW,
243 	.pr_domain =		&inet6domain,
244 	.pr_protocol =		IPPROTO_ROUTING,
245 	.pr_flags =		PR_ATOMIC|PR_ADDR,
246 	.pr_input =		route6_input,
247 	.pr_usrreqs =		&nousrreqs
248 },
249 {
250 	.pr_type =		SOCK_RAW,
251 	.pr_domain =		&inet6domain,
252 	.pr_protocol =		IPPROTO_FRAGMENT,
253 	.pr_flags =		PR_ATOMIC|PR_ADDR,
254 	.pr_input =		frag6_input,
255 	.pr_usrreqs =		&nousrreqs
256 },
257 #ifdef IPSEC
258 {
259 	.pr_type =		SOCK_RAW,
260 	.pr_domain =		&inet6domain,
261 	.pr_protocol =		IPPROTO_AH,
262 	.pr_flags =		PR_ATOMIC|PR_ADDR,
263 	.pr_input =		ipsec6_common_input,
264 	.pr_usrreqs =		&nousrreqs,
265 },
266 {
267 	.pr_type =		SOCK_RAW,
268 	.pr_domain =		&inet6domain,
269 	.pr_protocol =		IPPROTO_ESP,
270 	.pr_flags =		PR_ATOMIC|PR_ADDR,
271         .pr_input =		ipsec6_common_input,
272 	.pr_ctlinput =		esp6_ctlinput,
273 	.pr_usrreqs =		&nousrreqs,
274 },
275 {
276 	.pr_type =		SOCK_RAW,
277 	.pr_domain =		&inet6domain,
278 	.pr_protocol =		IPPROTO_IPCOMP,
279 	.pr_flags =		PR_ATOMIC|PR_ADDR,
280         .pr_input =		ipsec6_common_input,
281 	.pr_usrreqs =		&nousrreqs,
282 },
283 #endif /* IPSEC */
284 #ifdef INET
285 {
286 	.pr_type =		SOCK_RAW,
287 	.pr_domain =		&inet6domain,
288 	.pr_protocol =		IPPROTO_IPV4,
289 	.pr_flags =		PR_ATOMIC|PR_ADDR|PR_LASTHDR,
290 	.pr_input =		encap6_input,
291 	.pr_output =		rip6_output,
292 	.pr_ctloutput =		rip6_ctloutput,
293 	.pr_init =		encap_init,
294 	.pr_usrreqs =		&rip6_usrreqs
295 },
296 #endif /* INET */
297 {
298 	.pr_type =		SOCK_RAW,
299 	.pr_domain =		&inet6domain,
300 	.pr_protocol =		IPPROTO_IPV6,
301 	.pr_flags =		PR_ATOMIC|PR_ADDR|PR_LASTHDR,
302 	.pr_input =		encap6_input,
303 	.pr_output =		rip6_output,
304 	.pr_ctloutput =		rip6_ctloutput,
305 	.pr_init =		encap_init,
306 	.pr_usrreqs =		&rip6_usrreqs
307 },
308 {
309 	.pr_type =		SOCK_RAW,
310 	.pr_domain =		&inet6domain,
311 	.pr_protocol =		IPPROTO_PIM,
312 	.pr_flags =		PR_ATOMIC|PR_ADDR|PR_LASTHDR,
313 	.pr_input =		encap6_input,
314 	.pr_output =		rip6_output,
315 	.pr_ctloutput =		rip6_ctloutput,
316 	.pr_usrreqs =		&rip6_usrreqs
317 },
318 #ifdef DEV_CARP
319 {
320 	.pr_type =		SOCK_RAW,
321 	.pr_domain =		&inet6domain,
322 	.pr_protocol =		IPPROTO_CARP,
323 	.pr_flags =		PR_ATOMIC|PR_ADDR,
324 	.pr_input =		carp6_input,
325 	.pr_output =		rip6_output,
326 	.pr_ctloutput =		rip6_ctloutput,
327 	.pr_usrreqs =		&rip6_usrreqs
328 },
329 #endif /* DEV_CARP */
330 /* raw wildcard */
331 {
332 	.pr_type =		SOCK_RAW,
333 	.pr_domain =		&inet6domain,
334 	.pr_flags =		PR_ATOMIC|PR_ADDR,
335 	.pr_input =		rip6_input,
336 	.pr_output =		rip6_output,
337 	.pr_ctloutput =		rip6_ctloutput,
338 	.pr_usrreqs =		&rip6_usrreqs
339 },
340 };
341 
342 extern int in6_inithead(void **, int);
343 
344 struct domain inet6domain = {
345 	.dom_family =		AF_INET6,
346 	.dom_name =		"internet6",
347 	.dom_protosw =		(struct protosw *)inet6sw,
348 	.dom_protoswNPROTOSW =	(struct protosw *)
349 				&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
350 	.dom_rtattach =		in6_inithead,
351 	.dom_rtoffset =		offsetof(struct sockaddr_in6, sin6_addr) << 3,
352 	.dom_maxrtkey =		sizeof(struct sockaddr_in6),
353 	.dom_ifattach =		in6_domifattach,
354 	.dom_ifdetach =		in6_domifdetach
355 };
356 
357 DOMAIN_SET(inet6);
358 
359 /*
360  * Internet configuration info
361  */
362 #ifndef	IPV6FORWARDING
363 #ifdef GATEWAY6
364 #define	IPV6FORWARDING	1	/* forward IP6 packets not for us */
365 #else
366 #define	IPV6FORWARDING	0	/* don't forward IP6 packets not for us */
367 #endif /* GATEWAY6 */
368 #endif /* !IPV6FORWARDING */
369 
370 #ifndef	IPV6_SENDREDIRECTS
371 #define	IPV6_SENDREDIRECTS	1
372 #endif
373 
374 int	ip6_forwarding = IPV6FORWARDING;	/* act as router? */
375 int	ip6_sendredirects = IPV6_SENDREDIRECTS;
376 int	ip6_defhlim = IPV6_DEFHLIM;
377 int	ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
378 int	ip6_accept_rtadv = 0;	/* "IPV6FORWARDING ? 0 : 1" is dangerous */
379 int	ip6_maxfragpackets;	/* initialized in frag6.c:frag6_init() */
380 int	ip6_maxfrags;	/* initialized in frag6.c:frag6_init() */
381 int	ip6_log_interval = 5;
382 int	ip6_hdrnestlimit = 15;	/* How many header options will we process? */
383 int	ip6_dad_count = 1;	/* DupAddrDetectionTransmits */
384 int	ip6_auto_flowlabel = 1;
385 int	ip6_gif_hlim = 0;
386 int	ip6_use_deprecated = 1;	/* allow deprecated addr (RFC2462 5.5.4) */
387 int	ip6_rr_prune = 5;	/* router renumbering prefix
388 				 * walk list every 5 sec. */
389 int	ip6_mcast_pmtu = 0;	/* enable pMTU discovery for multicast? */
390 int	ip6_v6only = 1;
391 
392 int	ip6_keepfaith = 0;
393 time_t	ip6_log_time = (time_t)0L;
394 #ifdef IPSTEALTH
395 int	ip6stealth = 0;
396 #endif
397 
398 /* icmp6 */
399 /*
400  * BSDI4 defines these variables in in_proto.c...
401  * XXX: what if we don't define INET? Should we define pmtu6_expire
402  * or so? (jinmei@kame.net 19990310)
403  */
404 int pmtu_expire = 60*10;
405 int pmtu_probe = 60*2;
406 
407 /* raw IP6 parameters */
408 /*
409  * Nominal space allocated to a raw ip socket.
410  */
411 #define	RIPV6SNDQ	8192
412 #define	RIPV6RCVQ	8192
413 
414 u_long	rip6_sendspace = RIPV6SNDQ;
415 u_long	rip6_recvspace = RIPV6RCVQ;
416 
417 /* ICMPV6 parameters */
418 int	icmp6_rediraccept = 1;		/* accept and process redirects */
419 int	icmp6_redirtimeout = 10 * 60;	/* 10 minutes */
420 int	icmp6errppslim = 100;		/* 100pps */
421 /* control how to respond to NI queries */
422 int	icmp6_nodeinfo = (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
423 
424 /* UDP on IP6 parameters */
425 int	udp6_sendspace = 9216;		/* really max datagram size */
426 int	udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
427 					/* 40 1K datagrams */
428 
429 /*
430  * sysctl related items.
431  */
432 SYSCTL_NODE(_net,	PF_INET6,	inet6,	CTLFLAG_RW,	0,
433 	"Internet6 Family");
434 
435 /* net.inet6 */
436 SYSCTL_NODE(_net_inet6,	IPPROTO_IPV6,	ip6,	CTLFLAG_RW, 0,	"IP6");
437 SYSCTL_NODE(_net_inet6,	IPPROTO_ICMPV6,	icmp6,	CTLFLAG_RW, 0,	"ICMP6");
438 SYSCTL_NODE(_net_inet6,	IPPROTO_UDP,	udp6,	CTLFLAG_RW, 0,	"UDP6");
439 SYSCTL_NODE(_net_inet6,	IPPROTO_TCP,	tcp6,	CTLFLAG_RW, 0,	"TCP6");
440 #ifdef SCTP
441 SYSCTL_NODE(_net_inet6,	IPPROTO_SCTP,	sctp6,	CTLFLAG_RW, 0,	"SCTP6");
442 #endif
443 #ifdef IPSEC
444 SYSCTL_NODE(_net_inet6,	IPPROTO_ESP,	ipsec6,	CTLFLAG_RW, 0,	"IPSEC6");
445 #endif /* IPSEC */
446 
447 /* net.inet6.ip6 */
448 static int
449 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
450 {
451 	int error = 0;
452 	int old;
453 
454 	error = SYSCTL_OUT(req, arg1, sizeof(int));
455 	if (error || !req->newptr)
456 		return (error);
457 	old = ip6_temp_preferred_lifetime;
458 	error = SYSCTL_IN(req, arg1, sizeof(int));
459 	if (ip6_temp_preferred_lifetime <
460 	    ip6_desync_factor + ip6_temp_regen_advance) {
461 		ip6_temp_preferred_lifetime = old;
462 		return (EINVAL);
463 	}
464 	return (error);
465 }
466 
467 static int
468 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
469 {
470 	int error = 0;
471 	int old;
472 
473 	error = SYSCTL_OUT(req, arg1, sizeof(int));
474 	if (error || !req->newptr)
475 		return (error);
476 	old = ip6_temp_valid_lifetime;
477 	error = SYSCTL_IN(req, arg1, sizeof(int));
478 	if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
479 		ip6_temp_preferred_lifetime = old;
480 		return (EINVAL);
481 	}
482 	return (error);
483 }
484 
485 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
486 	forwarding, CTLFLAG_RW,		&ip6_forwarding,	0, "");
487 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
488 	redirect, CTLFLAG_RW,		&ip6_sendredirects,	0, "");
489 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
490 	hlim, CTLFLAG_RW,		&ip6_defhlim,	0, "");
491 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
492 	&ip6stat, ip6stat, "");
493 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
494 	maxfragpackets, CTLFLAG_RW,	&ip6_maxfragpackets,	0, "");
495 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
496 	accept_rtadv, CTLFLAG_RW,	&ip6_accept_rtadv,	0, "");
497 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
498 	keepfaith, CTLFLAG_RW,		&ip6_keepfaith,	0, "");
499 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
500 	log_interval, CTLFLAG_RW,	&ip6_log_interval,	0, "");
501 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
502 	hdrnestlimit, CTLFLAG_RW,	&ip6_hdrnestlimit,	0, "");
503 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
504 	dad_count, CTLFLAG_RW,	&ip6_dad_count,	0, "");
505 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
506 	auto_flowlabel, CTLFLAG_RW,	&ip6_auto_flowlabel,	0, "");
507 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
508 	defmcasthlim, CTLFLAG_RW,	&ip6_defmcasthlim,	0, "");
509 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
510 	gifhlim, CTLFLAG_RW,	&ip6_gif_hlim,			0, "");
511 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
512 	kame_version, CTLFLAG_RD,	__KAME_VERSION,		0, "");
513 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
514 	use_deprecated, CTLFLAG_RW,	&ip6_use_deprecated,	0, "");
515 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
516 	rr_prune, CTLFLAG_RW,	&ip6_rr_prune,			0, "");
517 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
518 	use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr,		0, "");
519 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
520 	   CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
521 	   sysctl_ip6_temppltime, "I", "");
522 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
523 	   CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
524 	   sysctl_ip6_tempvltime, "I", "");
525 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
526 	v6only,	CTLFLAG_RW,	&ip6_v6only,			0, "");
527 TUNABLE_INT("net.inet6.ip6.auto_linklocal", &ip6_auto_linklocal);
528 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
529 	auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal,	0, "");
530 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
531 	&rip6stat, rip6stat, "");
532 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
533 	prefer_tempaddr, CTLFLAG_RW, &ip6_prefer_tempaddr,	0, "");
534 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
535 	use_defaultzone, CTLFLAG_RW, &ip6_use_defzone,		0,"");
536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS,
537 	maxfrags, CTLFLAG_RW,		&ip6_maxfrags,	0, "");
538 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
539 	mcast_pmtu, CTLFLAG_RW,		&ip6_mcast_pmtu,	0, "");
540 #ifdef IPSTEALTH
541 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_RW,
542 	&ip6stealth, 0, "");
543 #endif
544 
545 /* net.inet6.icmp6 */
546 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
547 	rediraccept, CTLFLAG_RW,	&icmp6_rediraccept,	0, "");
548 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
549 	redirtimeout, CTLFLAG_RW,	&icmp6_redirtimeout,	0, "");
550 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
551 	&icmp6stat, icmp6stat, "");
552 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
553 	nd6_prune, CTLFLAG_RW,		&nd6_prune,	0, "");
554 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
555 	nd6_delay, CTLFLAG_RW,		&nd6_delay,	0, "");
556 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
557 	nd6_umaxtries, CTLFLAG_RW,	&nd6_umaxtries,	0, "");
558 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
559 	nd6_mmaxtries, CTLFLAG_RW,	&nd6_mmaxtries,	0, "");
560 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
561 	nd6_useloopback, CTLFLAG_RW,	&nd6_useloopback, 0, "");
562 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
563 	nodeinfo, CTLFLAG_RW,	&icmp6_nodeinfo,	0, "");
564 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
565 	errppslimit, CTLFLAG_RW,	&icmp6errppslim,	0, "");
566 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
567 	nd6_maxnudhint, CTLFLAG_RW,	&nd6_maxnudhint, 0, "");
568 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
569 	nd6_debug, CTLFLAG_RW,	&nd6_debug,		0, "");
570