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_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $
32 */
33
34 /*-
35 * Copyright (c) 1982, 1986, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 *
62 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
63 */
64
65 #include <sys/cdefs.h>
66 #include "opt_inet.h"
67 #include "opt_inet6.h"
68 #include "opt_ipsec.h"
69 #include "opt_ipstealth.h"
70 #include "opt_sctp.h"
71 #include "opt_route.h"
72
73 #include <sys/param.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/proc.h>
77 #include <sys/protosw.h>
78 #include <sys/jail.h>
79 #include <sys/kernel.h>
80 #include <sys/malloc.h>
81 #include <sys/domain.h>
82 #include <sys/mbuf.h>
83 #include <sys/systm.h>
84 #include <sys/sysctl.h>
85
86 #include <net/if.h>
87 #include <net/if_var.h>
88 #include <net/radix.h>
89 #include <net/route.h>
90
91 #include <netinet/in.h>
92 #include <netinet/in_systm.h>
93 #include <netinet/in_var.h>
94 #include <netinet/ip_encap.h>
95 #include <netinet/ip.h>
96 #include <netinet/ip_var.h>
97 #include <netinet/ip6.h>
98 #include <netinet6/ip6_var.h>
99 #include <netinet/icmp6.h>
100
101 #include <netinet/tcp.h>
102 #include <netinet/tcp_timer.h>
103 #include <netinet/tcp_var.h>
104 #include <netinet/udp.h>
105 #include <netinet/udp_var.h>
106 #include <netinet6/tcp6_var.h>
107 #include <netinet6/raw_ip6.h>
108 #include <netinet6/udp6_var.h>
109 #include <netinet6/pim6_var.h>
110 #include <netinet6/nd6.h>
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 #include <netinet6/ip6protosw.h>
121
122 /*
123 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
124 */
125 FEATURE(inet6, "Internet Protocol version 6");
126
127 extern struct domain inet6domain;
128 static struct pr_usrreqs nousrreqs;
129
130 #define PR_LISTEN 0
131 #define PR_ABRTACPTDIS 0
132
133 /* Spacer for loadable protocols. */
134 #define IP6PROTOSPACER \
135 { \
136 .pr_domain = &inet6domain, \
137 .pr_protocol = PROTO_SPACER, \
138 .pr_usrreqs = &nousrreqs \
139 }
140
141 struct protosw inet6sw[] = {
142 {
143 .pr_type = 0,
144 .pr_domain = &inet6domain,
145 .pr_protocol = IPPROTO_IPV6,
146 .pr_init = ip6_init,
147 .pr_slowtimo = frag6_slowtimo,
148 .pr_drain = frag6_drain,
149 .pr_usrreqs = &nousrreqs,
150 },
151 {
152 .pr_type = SOCK_DGRAM,
153 .pr_domain = &inet6domain,
154 .pr_protocol = IPPROTO_UDP,
155 .pr_flags = PR_ATOMIC|PR_ADDR,
156 .pr_input = udp6_input,
157 .pr_ctlinput = udp6_ctlinput,
158 .pr_ctloutput = ip6_ctloutput,
159 #ifndef INET /* Do not call initialization twice. */
160 .pr_init = udp_init,
161 #endif
162 .pr_usrreqs = &udp6_usrreqs,
163 },
164 {
165 .pr_type = SOCK_STREAM,
166 .pr_domain = &inet6domain,
167 .pr_protocol = IPPROTO_TCP,
168 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_LISTEN,
169 .pr_input = tcp6_input,
170 .pr_ctlinput = tcp6_ctlinput,
171 .pr_ctloutput = tcp_ctloutput,
172 #ifndef INET /* don't call initialization, timeout, and drain routines twice */
173 .pr_init = tcp_init,
174 .pr_slowtimo = tcp_slowtimo,
175 .pr_drain = tcp_drain,
176 #endif
177 .pr_usrreqs = &tcp6_usrreqs,
178 },
179 #ifdef SCTP
180 {
181 .pr_type = SOCK_SEQPACKET,
182 .pr_domain = &inet6domain,
183 .pr_protocol = IPPROTO_SCTP,
184 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
185 .pr_input = sctp6_input,
186 .pr_ctlinput = sctp6_ctlinput,
187 .pr_ctloutput = sctp_ctloutput,
188 #ifndef INET /* Do not call initialization and drain routines twice. */
189 .pr_drain = sctp_drain,
190 .pr_init = sctp_init,
191 #endif
192 .pr_usrreqs = &sctp6_usrreqs
193 },
194 {
195 .pr_type = SOCK_STREAM,
196 .pr_domain = &inet6domain,
197 .pr_protocol = IPPROTO_SCTP,
198 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
199 .pr_input = sctp6_input,
200 .pr_ctlinput = sctp6_ctlinput,
201 .pr_ctloutput = sctp_ctloutput,
202 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */
203 .pr_usrreqs = &sctp6_usrreqs
204 },
205 #endif /* SCTP */
206 {
207 .pr_type = SOCK_DGRAM,
208 .pr_domain = &inet6domain,
209 .pr_protocol = IPPROTO_UDPLITE,
210 .pr_flags = PR_ATOMIC|PR_ADDR,
211 .pr_input = udp6_input,
212 .pr_ctlinput = udplite6_ctlinput,
213 .pr_ctloutput = udp_ctloutput,
214 #ifndef INET /* Do not call initialization twice. */
215 .pr_init = udplite_init,
216 #endif
217 .pr_usrreqs = &udp6_usrreqs,
218 },
219 {
220 .pr_type = SOCK_RAW,
221 .pr_domain = &inet6domain,
222 .pr_protocol = IPPROTO_RAW,
223 .pr_flags = PR_ATOMIC|PR_ADDR,
224 .pr_input = rip6_input,
225 .pr_output = rip6_output,
226 .pr_ctlinput = rip6_ctlinput,
227 .pr_ctloutput = rip6_ctloutput,
228 #ifndef INET /* Do not call initialization twice. */
229 .pr_init = rip_init,
230 #endif
231 .pr_usrreqs = &rip6_usrreqs
232 },
233 {
234 .pr_type = SOCK_RAW,
235 .pr_domain = &inet6domain,
236 .pr_protocol = IPPROTO_ICMPV6,
237 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
238 .pr_input = icmp6_input,
239 .pr_output = rip6_output,
240 .pr_ctlinput = rip6_ctlinput,
241 .pr_ctloutput = rip6_ctloutput,
242 .pr_fasttimo = icmp6_fasttimo,
243 .pr_slowtimo = icmp6_slowtimo,
244 .pr_usrreqs = &rip6_usrreqs
245 },
246 {
247 .pr_type = SOCK_RAW,
248 .pr_domain = &inet6domain,
249 .pr_protocol = IPPROTO_DSTOPTS,
250 .pr_flags = PR_ATOMIC|PR_ADDR,
251 .pr_input = dest6_input,
252 .pr_usrreqs = &nousrreqs
253 },
254 {
255 .pr_type = SOCK_RAW,
256 .pr_domain = &inet6domain,
257 .pr_protocol = IPPROTO_ROUTING,
258 .pr_flags = PR_ATOMIC|PR_ADDR,
259 .pr_input = route6_input,
260 .pr_usrreqs = &nousrreqs
261 },
262 {
263 .pr_type = SOCK_RAW,
264 .pr_domain = &inet6domain,
265 .pr_protocol = IPPROTO_FRAGMENT,
266 .pr_flags = PR_ATOMIC|PR_ADDR,
267 .pr_input = frag6_input,
268 .pr_usrreqs = &nousrreqs
269 },
270 #ifdef INET
271 {
272 .pr_type = SOCK_RAW,
273 .pr_domain = &inet6domain,
274 .pr_protocol = IPPROTO_IPV4,
275 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
276 .pr_input = encap6_input,
277 .pr_output = rip6_output,
278 .pr_ctloutput = rip6_ctloutput,
279 .pr_usrreqs = &rip6_usrreqs
280 },
281 #endif /* INET */
282 {
283 .pr_type = SOCK_RAW,
284 .pr_domain = &inet6domain,
285 .pr_protocol = IPPROTO_IPV6,
286 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
287 .pr_input = encap6_input,
288 .pr_output = rip6_output,
289 .pr_ctloutput = rip6_ctloutput,
290 .pr_usrreqs = &rip6_usrreqs
291 },
292 {
293 .pr_type = SOCK_RAW,
294 .pr_domain = &inet6domain,
295 .pr_protocol = IPPROTO_ETHERIP,
296 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
297 .pr_input = encap6_input,
298 .pr_ctloutput = rip6_ctloutput,
299 .pr_usrreqs = &rip6_usrreqs
300 },
301 {
302 .pr_type = SOCK_RAW,
303 .pr_domain = &inet6domain,
304 .pr_protocol = IPPROTO_GRE,
305 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
306 .pr_input = encap6_input,
307 .pr_output = rip6_output,
308 .pr_ctloutput = rip6_ctloutput,
309 .pr_usrreqs = &rip6_usrreqs
310 },
311 {
312 .pr_type = SOCK_RAW,
313 .pr_domain = &inet6domain,
314 .pr_protocol = IPPROTO_PIM,
315 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
316 .pr_input = encap6_input,
317 .pr_output = rip6_output,
318 .pr_ctloutput = rip6_ctloutput,
319 .pr_usrreqs = &rip6_usrreqs
320 },
321 /* Spacer n-times for loadable protocols. */
322 IP6PROTOSPACER,
323 IP6PROTOSPACER,
324 IP6PROTOSPACER,
325 IP6PROTOSPACER,
326 IP6PROTOSPACER,
327 IP6PROTOSPACER,
328 IP6PROTOSPACER,
329 IP6PROTOSPACER,
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 struct domain inet6domain = {
343 .dom_family = AF_INET6,
344 .dom_name = "internet6",
345 .dom_protosw = (struct protosw *)inet6sw,
346 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)],
347 .dom_rtattach = in6_inithead,
348 #ifdef VIMAGE
349 .dom_rtdetach = in6_detachhead,
350 #endif
351 .dom_ifattach = in6_domifattach,
352 .dom_ifdetach = in6_domifdetach,
353 .dom_ifmtu = in6_domifmtu
354 };
355
356 VNET_DOMAIN_SET(inet6);
357
358 /*
359 * Internet configuration info
360 */
361 #ifndef IPV6FORWARDING
362 #ifdef GATEWAY6
363 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
364 #else
365 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
366 #endif /* GATEWAY6 */
367 #endif /* !IPV6FORWARDING */
368
369 #ifndef IPV6_SENDREDIRECTS
370 #define IPV6_SENDREDIRECTS 1
371 #endif
372
373 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */
374 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
375 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
376 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
377 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
378 VNET_DEFINE(int, ip6_no_radr) = 0;
379 VNET_DEFINE(int, ip6_norbit_raif) = 0;
380 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
381 VNET_DEFINE(int, ip6_log_interval) = 5;
382 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
383 * process? */
384 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */
385 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
386 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
387 * (RFC2462 5.5.4) */
388 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix
389 * walk list every 5 sec. */
390 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */
391 VNET_DEFINE(int, ip6_v6only) = 1;
392
393 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
394 #ifdef IPSTEALTH
395 VNET_DEFINE(int, ip6stealth) = 0;
396 #endif
397 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
398 * (RFC 4861) */
399
400 /* icmp6 */
401 /*
402 * BSDI4 defines these variables in in_proto.c...
403 * XXX: what if we don't define INET? Should we define pmtu6_expire
404 * or so? (jinmei@kame.net 19990310)
405 */
406 VNET_DEFINE(int, pmtu_expire) = 60*10;
407 VNET_DEFINE(int, pmtu_probe) = 60*2;
408
409 /* ICMPV6 parameters */
410 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
411 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
412 /* control how to respond to NI queries */
413 VNET_DEFINE(int, icmp6_nodeinfo) = 0;
414 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
415
416 /*
417 * sysctl related items.
418 */
419 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
420 "Internet6 Family");
421
422 /* net.inet6 */
423 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
424 "IP6");
425 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
426 "ICMP6");
427 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
428 "UDP6");
429 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
430 "TCP6");
431 #if defined(SCTP) || defined(SCTP_SUPPORT)
432 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
433 "SCTP6");
434 #endif
435 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
436 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
437 "IPSEC6");
438 #endif /* IPSEC */
439
440 /* net.inet6.ip6 */
441 static int
sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)442 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
443 {
444 int error, val;
445
446 val = V_ip6_temp_preferred_lifetime;
447 error = sysctl_handle_int(oidp, &val, 0, req);
448 if (error != 0 || !req->newptr)
449 return (error);
450 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance)
451 return (EINVAL);
452 V_ip6_temp_preferred_lifetime = val;
453 return (0);
454 }
455
456 static int
sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)457 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
458 {
459 int error, val;
460
461 val = V_ip6_temp_valid_lifetime;
462 error = sysctl_handle_int(oidp, &val, 0, req);
463 if (error != 0 || !req->newptr)
464 return (error);
465 if (val < V_ip6_temp_preferred_lifetime)
466 return (EINVAL);
467 V_ip6_temp_valid_lifetime = val;
468 return (0);
469 }
470
471 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
472 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
473 "Enable forwarding of IPv6 packets between interfaces");
474 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
475 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
476 "Send ICMPv6 redirects for unforwardable IPv6 packets");
477 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
478 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
479 "Default hop limit to use for outgoing IPv6 packets");
480 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
481 ip6stat,
482 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
483 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
484 CTLFLAG_VNET | CTLFLAG_RWTUN, &VNET_NAME(ip6_accept_rtadv), 0,
485 "Default value of per-interface flag for accepting ICMPv6 RA messages");
486 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
487 CTLFLAG_VNET | CTLFLAG_RWTUN, &VNET_NAME(ip6_no_radr), 0,
488 "Default value of per-interface flag to control whether routers "
489 "sending ICMPv6 RA messages on that interface are added into the "
490 "default router list");
491 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif,
492 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0,
493 "Always set clear the R flag in ICMPv6 NA messages when accepting RA "
494 "on the interface");
495 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
496 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
497 "Accept the default router list from ICMPv6 RA messages even "
498 "when packet forwarding is enabled");
499 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
500 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
501 "Frequency in seconds at which to log IPv6 forwarding errors");
502 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
503 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
504 "Default maximum number of IPv6 extension headers permitted on "
505 "incoming IPv6 packets, 0 for no artificial limit");
506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
508 "Number of ICMPv6 NS messages sent during duplicate address detection");
509 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
510 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
511 "Provide an IPv6 flowlabel in outbound packets");
512 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
513 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
514 "Default hop limit for IPv6 multicast packets originating from this "
515 "node");
516 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
517 CTLFLAG_RD, __KAME_VERSION, 0,
518 "KAME version string");
519 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
520 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
521 "Allow the use of addresses whose preferred lifetimes have expired");
522 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
523 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
524 ""); /* XXX unused */
525 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
526 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
527 "Create RFC3041 temporary addresses for autoconfigured addresses");
528 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
529 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
530 NULL, 0, sysctl_ip6_temppltime, "I",
531 "Maximum preferred lifetime for temporary addresses");
532 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
533 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
534 NULL, 0, sysctl_ip6_tempvltime, "I",
535 "Maximum valid lifetime for temporary addresses");
536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
538 "Restrict AF_INET6 sockets to IPv6 addresses only");
539 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
540 CTLFLAG_VNET | CTLFLAG_RWTUN, &VNET_NAME(ip6_auto_linklocal), 0,
541 "Default value of per-interface flag for automatically adding an IPv6 "
542 "link-local address to interfaces when attached");
543 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats,
544 struct rip6stat, rip6stat,
545 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)");
546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
547 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
548 "Prefer RFC3041 temporary addresses in source address selection");
549 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
550 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
551 "Use the default scope zone when none is specified");
552 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu,
553 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0,
554 "Enable path MTU discovery for multicast packets");
555 #ifdef IPSTEALTH
556 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW,
557 &VNET_NAME(ip6stealth), 0,
558 "Forward IPv6 packets without decrementing their TTL");
559 #endif
560
561 /* net.inet6.icmp6 */
562 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
563 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
564 "Accept ICMPv6 redirect messages");
565 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
566 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0,
567 "Delay in seconds before expiring redirect route");
568 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats,
569 struct icmp6stat, icmp6stat,
570 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)");
571 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
572 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0,
573 "Frequency in seconds of checks for expired prefixes and routers");
574 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay,
575 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0,
576 "Delay in seconds before probing for reachability");
577 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
578 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
579 "Number of ICMPv6 NS messages sent during reachability detection");
580 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
581 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
582 "Number of ICMPv6 NS messages sent during address resolution");
583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
584 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
585 "Create a loopback route when configuring an IPv6 address");
586 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo,
587 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0,
588 "Mask of enabled RFC4620 node information query types");
589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
590 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW,
591 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0,
592 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup "
593 "for compatibility with KAME implementation");
594 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
595 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0,
596 ""); /* XXX unused */
597 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
598 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0,
599 "Log NDP debug messages");
600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
601 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW,
602 &VNET_NAME(nd6_onlink_ns_rfc4861), 0,
603 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861");
604 #ifdef EXPERIMENTAL
605 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
606 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW,
607 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0,
608 "Ignore the 'IPv6-Only flag' in RA messages in compliance with "
609 "draft-ietf-6man-ipv6only-flag");
610 #endif
611