2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
31 * $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $
35 * Copyright (c) 1982, 1986, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
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.
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
62 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
65 #include <sys/cdefs.h>
66 __FBSDID("$FreeBSD$");
69 #include "opt_inet6.h"
70 #include "opt_ipsec.h"
71 #include "opt_ipstealth.h"
73 #include "opt_route.h"
75 #include <sys/param.h>
76 #include <sys/socket.h>
77 #include <sys/socketvar.h>
79 #include <sys/protosw.h>
81 #include <sys/kernel.h>
82 #include <sys/malloc.h>
83 #include <sys/domain.h>
85 #include <sys/systm.h>
86 #include <sys/sysctl.h>
89 #include <net/if_var.h>
90 #include <net/radix.h>
91 #include <net/route.h>
93 #include <netinet/in.h>
94 #include <netinet/in_systm.h>
95 #include <netinet/in_var.h>
96 #include <netinet/ip_encap.h>
97 #include <netinet/ip.h>
98 #include <netinet/ip_var.h>
99 #include <netinet/ip6.h>
100 #include <netinet6/ip6_var.h>
101 #include <netinet/icmp6.h>
103 #include <netinet/tcp.h>
104 #include <netinet/tcp_timer.h>
105 #include <netinet/tcp_var.h>
106 #include <netinet/udp.h>
107 #include <netinet/udp_var.h>
108 #include <netinet6/tcp6_var.h>
109 #include <netinet6/raw_ip6.h>
110 #include <netinet6/udp6_var.h>
111 #include <netinet6/pim6_var.h>
112 #include <netinet6/nd6.h>
115 #include <netinet/in_pcb.h>
116 #include <netinet/sctp_pcb.h>
117 #include <netinet/sctp.h>
118 #include <netinet/sctp_var.h>
119 #include <netinet6/sctp6_var.h>
122 #include <netinet6/ip6protosw.h>
125 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
127 FEATURE(inet6, "Internet Protocol version 6");
129 extern struct domain inet6domain;
130 static struct pr_usrreqs nousrreqs;
133 #define PR_ABRTACPTDIS 0
135 /* Spacer for loadable protocols. */
136 #define IP6PROTOSPACER \
138 .pr_domain = &inet6domain, \
139 .pr_protocol = PROTO_SPACER, \
140 .pr_usrreqs = &nousrreqs \
143 struct protosw inet6sw[] = {
146 .pr_domain = &inet6domain,
147 .pr_protocol = IPPROTO_IPV6,
148 .pr_flags = PR_CAPATTACH,
150 .pr_slowtimo = frag6_slowtimo,
151 .pr_drain = frag6_drain,
152 .pr_usrreqs = &nousrreqs,
155 .pr_type = SOCK_DGRAM,
156 .pr_domain = &inet6domain,
157 .pr_protocol = IPPROTO_UDP,
158 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH,
159 .pr_input = udp6_input,
160 .pr_ctlinput = udp6_ctlinput,
161 .pr_ctloutput = ip6_ctloutput,
162 #ifndef INET /* Do not call initialization twice. */
165 .pr_usrreqs = &udp6_usrreqs,
168 .pr_type = SOCK_STREAM,
169 .pr_domain = &inet6domain,
170 .pr_protocol = IPPROTO_TCP,
171 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|
172 PR_LISTEN|PR_CAPATTACH,
173 .pr_input = tcp6_input,
174 .pr_ctlinput = tcp6_ctlinput,
175 .pr_ctloutput = tcp_ctloutput,
176 #ifndef INET /* don't call initialization, timeout, and drain routines twice */
178 .pr_slowtimo = tcp_slowtimo,
179 .pr_drain = tcp_drain,
181 .pr_usrreqs = &tcp6_usrreqs,
185 .pr_type = SOCK_SEQPACKET,
186 .pr_domain = &inet6domain,
187 .pr_protocol = IPPROTO_SCTP,
188 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
189 .pr_input = sctp6_input,
190 .pr_ctlinput = sctp6_ctlinput,
191 .pr_ctloutput = sctp_ctloutput,
192 #ifndef INET /* Do not call initialization and drain routines twice. */
193 .pr_drain = sctp_drain,
194 .pr_init = sctp_init,
196 .pr_usrreqs = &sctp6_usrreqs
199 .pr_type = SOCK_STREAM,
200 .pr_domain = &inet6domain,
201 .pr_protocol = IPPROTO_SCTP,
202 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
203 .pr_input = sctp6_input,
204 .pr_ctlinput = sctp6_ctlinput,
205 .pr_ctloutput = sctp_ctloutput,
206 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */
207 .pr_usrreqs = &sctp6_usrreqs
211 .pr_type = SOCK_DGRAM,
212 .pr_domain = &inet6domain,
213 .pr_protocol = IPPROTO_UDPLITE,
214 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH,
215 .pr_input = udp6_input,
216 .pr_ctlinput = udplite6_ctlinput,
217 .pr_ctloutput = udp_ctloutput,
218 #ifndef INET /* Do not call initialization twice. */
219 .pr_init = udplite_init,
221 .pr_usrreqs = &udp6_usrreqs,
225 .pr_domain = &inet6domain,
226 .pr_protocol = IPPROTO_RAW,
227 .pr_flags = PR_ATOMIC|PR_ADDR,
228 .pr_input = rip6_input,
229 .pr_output = rip6_output,
230 .pr_ctlinput = rip6_ctlinput,
231 .pr_ctloutput = rip6_ctloutput,
232 #ifndef INET /* Do not call initialization twice. */
235 .pr_usrreqs = &rip6_usrreqs
239 .pr_domain = &inet6domain,
240 .pr_protocol = IPPROTO_ICMPV6,
241 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
242 .pr_input = icmp6_input,
243 .pr_output = rip6_output,
244 .pr_ctlinput = rip6_ctlinput,
245 .pr_ctloutput = rip6_ctloutput,
246 .pr_fasttimo = icmp6_fasttimo,
247 .pr_slowtimo = icmp6_slowtimo,
248 .pr_usrreqs = &rip6_usrreqs
252 .pr_domain = &inet6domain,
253 .pr_protocol = IPPROTO_DSTOPTS,
254 .pr_flags = PR_ATOMIC|PR_ADDR,
255 .pr_input = dest6_input,
256 .pr_usrreqs = &nousrreqs
260 .pr_domain = &inet6domain,
261 .pr_protocol = IPPROTO_ROUTING,
262 .pr_flags = PR_ATOMIC|PR_ADDR,
263 .pr_input = route6_input,
264 .pr_usrreqs = &nousrreqs
268 .pr_domain = &inet6domain,
269 .pr_protocol = IPPROTO_FRAGMENT,
270 .pr_flags = PR_ATOMIC|PR_ADDR,
271 .pr_input = frag6_input,
272 .pr_usrreqs = &nousrreqs
277 .pr_domain = &inet6domain,
278 .pr_protocol = IPPROTO_IPV4,
279 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
280 .pr_input = encap6_input,
281 .pr_output = rip6_output,
282 .pr_ctloutput = rip6_ctloutput,
283 .pr_usrreqs = &rip6_usrreqs
288 .pr_domain = &inet6domain,
289 .pr_protocol = IPPROTO_IPV6,
290 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
291 .pr_input = encap6_input,
292 .pr_output = rip6_output,
293 .pr_ctloutput = rip6_ctloutput,
294 .pr_usrreqs = &rip6_usrreqs
298 .pr_domain = &inet6domain,
299 .pr_protocol = IPPROTO_GRE,
300 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
301 .pr_input = encap6_input,
302 .pr_output = rip6_output,
303 .pr_ctloutput = rip6_ctloutput,
304 .pr_usrreqs = &rip6_usrreqs
308 .pr_domain = &inet6domain,
309 .pr_protocol = IPPROTO_PIM,
310 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
311 .pr_input = encap6_input,
312 .pr_output = rip6_output,
313 .pr_ctloutput = rip6_ctloutput,
314 .pr_usrreqs = &rip6_usrreqs
316 /* Spacer n-times for loadable protocols. */
328 .pr_domain = &inet6domain,
329 .pr_flags = PR_ATOMIC|PR_ADDR,
330 .pr_input = rip6_input,
331 .pr_output = rip6_output,
332 .pr_ctloutput = rip6_ctloutput,
333 .pr_usrreqs = &rip6_usrreqs
337 struct domain inet6domain = {
338 .dom_family = AF_INET6,
339 .dom_name = "internet6",
340 .dom_protosw = (struct protosw *)inet6sw,
341 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)],
342 .dom_rtattach = in6_inithead,
344 .dom_rtdetach = in6_detachhead,
346 .dom_ifattach = in6_domifattach,
347 .dom_ifdetach = in6_domifdetach,
348 .dom_ifmtu = in6_domifmtu
351 VNET_DOMAIN_SET(inet6);
354 * Internet configuration info
356 #ifndef IPV6FORWARDING
358 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
360 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
361 #endif /* GATEWAY6 */
362 #endif /* !IPV6FORWARDING */
364 #ifndef IPV6_SENDREDIRECTS
365 #define IPV6_SENDREDIRECTS 1
368 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */
369 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
370 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
371 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
372 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
373 VNET_DEFINE(int, ip6_no_radr) = 0;
374 VNET_DEFINE(int, ip6_norbit_raif) = 0;
375 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
376 VNET_DEFINE(int, ip6_log_interval) = 5;
377 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
379 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */
380 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
381 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
383 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix
384 * walk list every 5 sec. */
385 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */
386 VNET_DEFINE(int, ip6_v6only) = 1;
388 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
390 VNET_DEFINE(int, ip6stealth) = 0;
392 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
397 * BSDI4 defines these variables in in_proto.c...
398 * XXX: what if we don't define INET? Should we define pmtu6_expire
399 * or so? (jinmei@kame.net 19990310)
401 VNET_DEFINE(int, pmtu_expire) = 60*10;
402 VNET_DEFINE(int, pmtu_probe) = 60*2;
404 /* ICMPV6 parameters */
405 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
406 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
407 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */
408 /* control how to respond to NI queries */
409 VNET_DEFINE(int, icmp6_nodeinfo) =
410 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
411 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
414 * sysctl related items.
416 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
420 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
422 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
424 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
426 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
428 #if defined(SCTP) || defined(SCTP_SUPPORT)
429 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
432 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
433 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
439 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
443 val = V_ip6_temp_preferred_lifetime;
444 error = sysctl_handle_int(oidp, &val, 0, req);
445 if (error != 0 || !req->newptr)
447 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance)
449 V_ip6_temp_preferred_lifetime = val;
454 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
458 val = V_ip6_temp_valid_lifetime;
459 error = sysctl_handle_int(oidp, &val, 0, req);
460 if (error != 0 || !req->newptr)
462 if (val < V_ip6_temp_preferred_lifetime)
464 V_ip6_temp_valid_lifetime = val;
468 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
469 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
470 "Enable forwarding of IPv6 packets between interfaces");
471 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
472 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
473 "Send ICMPv6 redirects for unforwardable IPv6 packets");
474 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
475 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
476 "Default hop limit to use for outgoing IPv6 packets");
477 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
479 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
480 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
481 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
482 "Default value of per-interface flag for accepting ICMPv6 RA messages");
483 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
484 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
485 "Default value of per-interface flag to control whether routers "
486 "sending ICMPv6 RA messages on that interface are added into the "
487 "default router list");
488 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif,
489 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0,
490 "Always set clear the R flag in ICMPv6 NA messages when accepting RA "
492 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
493 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
494 "Accept the default router list from ICMPv6 RA messages even "
495 "when packet forwarding is enabled");
496 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
497 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
498 "Frequency in seconds at which to log IPv6 forwarding errors");
499 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
500 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
501 "Default maximum number of IPv6 extension headers permitted on "
502 "incoming IPv6 packets, 0 for no artificial limit");
503 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
504 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
505 "Number of ICMPv6 NS messages sent during duplicate address detection");
506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
508 "Provide an IPv6 flowlabel in outbound packets");
509 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
510 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
511 "Default hop limit for IPv6 multicast packets originating from this "
513 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
514 CTLFLAG_RD, __KAME_VERSION, 0,
515 "KAME version string");
516 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
517 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
518 "Allow the use of addresses whose preferred lifetimes have expired");
519 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
520 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
521 ""); /* XXX unused */
522 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
523 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
524 "Create RFC3041 temporary addresses for autoconfigured addresses");
525 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
526 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
527 NULL, 0, sysctl_ip6_temppltime, "I",
528 "Maximum preferred lifetime for temporary addresses");
529 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
530 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
531 NULL, 0, sysctl_ip6_tempvltime, "I",
532 "Maximum valid lifetime for temporary addresses");
533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
534 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
535 "Restrict AF_INET6 sockets to IPv6 addresses only");
536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
538 "Default value of per-interface flag for automatically adding an IPv6 "
539 "link-local address to interfaces when attached");
540 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats,
541 struct rip6stat, rip6stat,
542 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)");
543 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
544 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
545 "Prefer RFC3041 temporary addresses in source address selection");
546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
547 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
548 "Use the default scope zone when none is specified");
549 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu,
550 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0,
551 "Enable path MTU discovery for multicast packets");
553 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW,
554 &VNET_NAME(ip6stealth), 0,
555 "Forward IPv6 packets without decrementing their TTL");
558 /* net.inet6.icmp6 */
559 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
560 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
561 "Accept ICMPv6 redirect messages");
562 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
563 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0,
564 "Delay in seconds before expiring redirect route");
565 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats,
566 struct icmp6stat, icmp6stat,
567 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)");
568 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
569 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0,
570 "Frequency in seconds of checks for expired prefixes and routers");
571 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay,
572 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0,
573 "Delay in seconds before probing for reachability");
574 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
575 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
576 "Number of ICMPv6 NS messages sent during reachability detection");
577 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
578 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
579 "Number of ICMPv6 NS messages sent during address resolution");
580 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
581 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
582 "Create a loopback route when configuring an IPv6 address");
583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo,
584 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0,
585 "Mask of enabled RFC4620 node information query types");
586 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
587 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW,
588 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0,
589 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup "
590 "for compatibility with KAME implementation");
591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
592 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0,
593 "Maximum number of ICMPv6 error messages per second");
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");
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");