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,
149 .pr_slowtimo = frag6_slowtimo,
150 .pr_drain = frag6_drain,
151 .pr_usrreqs = &nousrreqs,
154 .pr_type = SOCK_DGRAM,
155 .pr_domain = &inet6domain,
156 .pr_protocol = IPPROTO_UDP,
157 .pr_flags = PR_ATOMIC|PR_ADDR,
158 .pr_input = udp6_input,
159 .pr_ctlinput = udp6_ctlinput,
160 .pr_ctloutput = ip6_ctloutput,
161 #ifndef INET /* Do not call initialization twice. */
164 .pr_usrreqs = &udp6_usrreqs,
167 .pr_type = SOCK_STREAM,
168 .pr_domain = &inet6domain,
169 .pr_protocol = IPPROTO_TCP,
170 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_LISTEN,
171 .pr_input = tcp6_input,
172 .pr_ctlinput = tcp6_ctlinput,
173 .pr_ctloutput = tcp_ctloutput,
174 #ifndef INET /* don't call initialization, timeout, and drain routines twice */
176 .pr_slowtimo = tcp_slowtimo,
177 .pr_drain = tcp_drain,
179 .pr_usrreqs = &tcp6_usrreqs,
183 .pr_type = SOCK_SEQPACKET,
184 .pr_domain = &inet6domain,
185 .pr_protocol = IPPROTO_SCTP,
186 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
187 .pr_input = sctp6_input,
188 .pr_ctlinput = sctp6_ctlinput,
189 .pr_ctloutput = sctp_ctloutput,
190 #ifndef INET /* Do not call initialization and drain routines twice. */
191 .pr_drain = sctp_drain,
192 .pr_init = sctp_init,
194 .pr_usrreqs = &sctp6_usrreqs
197 .pr_type = SOCK_STREAM,
198 .pr_domain = &inet6domain,
199 .pr_protocol = IPPROTO_SCTP,
200 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
201 .pr_input = sctp6_input,
202 .pr_ctlinput = sctp6_ctlinput,
203 .pr_ctloutput = sctp_ctloutput,
204 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */
205 .pr_usrreqs = &sctp6_usrreqs
209 .pr_type = SOCK_DGRAM,
210 .pr_domain = &inet6domain,
211 .pr_protocol = IPPROTO_UDPLITE,
212 .pr_flags = PR_ATOMIC|PR_ADDR,
213 .pr_input = udp6_input,
214 .pr_ctlinput = udplite6_ctlinput,
215 .pr_ctloutput = udp_ctloutput,
216 #ifndef INET /* Do not call initialization twice. */
217 .pr_init = udplite_init,
219 .pr_usrreqs = &udp6_usrreqs,
223 .pr_domain = &inet6domain,
224 .pr_protocol = IPPROTO_RAW,
225 .pr_flags = PR_ATOMIC|PR_ADDR,
226 .pr_input = rip6_input,
227 .pr_output = rip6_output,
228 .pr_ctlinput = rip6_ctlinput,
229 .pr_ctloutput = rip6_ctloutput,
230 #ifndef INET /* Do not call initialization twice. */
233 .pr_usrreqs = &rip6_usrreqs
237 .pr_domain = &inet6domain,
238 .pr_protocol = IPPROTO_ICMPV6,
239 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
240 .pr_input = icmp6_input,
241 .pr_output = rip6_output,
242 .pr_ctlinput = rip6_ctlinput,
243 .pr_ctloutput = rip6_ctloutput,
244 .pr_fasttimo = icmp6_fasttimo,
245 .pr_slowtimo = icmp6_slowtimo,
246 .pr_usrreqs = &rip6_usrreqs
250 .pr_domain = &inet6domain,
251 .pr_protocol = IPPROTO_DSTOPTS,
252 .pr_flags = PR_ATOMIC|PR_ADDR,
253 .pr_input = dest6_input,
254 .pr_usrreqs = &nousrreqs
258 .pr_domain = &inet6domain,
259 .pr_protocol = IPPROTO_ROUTING,
260 .pr_flags = PR_ATOMIC|PR_ADDR,
261 .pr_input = route6_input,
262 .pr_usrreqs = &nousrreqs
266 .pr_domain = &inet6domain,
267 .pr_protocol = IPPROTO_FRAGMENT,
268 .pr_flags = PR_ATOMIC|PR_ADDR,
269 .pr_input = frag6_input,
270 .pr_usrreqs = &nousrreqs
275 .pr_domain = &inet6domain,
276 .pr_protocol = IPPROTO_IPV4,
277 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
278 .pr_input = encap6_input,
279 .pr_output = rip6_output,
280 .pr_ctloutput = rip6_ctloutput,
281 .pr_usrreqs = &rip6_usrreqs
286 .pr_domain = &inet6domain,
287 .pr_protocol = IPPROTO_IPV6,
288 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
289 .pr_input = encap6_input,
290 .pr_output = rip6_output,
291 .pr_ctloutput = rip6_ctloutput,
292 .pr_usrreqs = &rip6_usrreqs
296 .pr_domain = &inet6domain,
297 .pr_protocol = IPPROTO_GRE,
298 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
299 .pr_input = encap6_input,
300 .pr_output = rip6_output,
301 .pr_ctloutput = rip6_ctloutput,
302 .pr_usrreqs = &rip6_usrreqs
306 .pr_domain = &inet6domain,
307 .pr_protocol = IPPROTO_PIM,
308 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
309 .pr_input = encap6_input,
310 .pr_output = rip6_output,
311 .pr_ctloutput = rip6_ctloutput,
312 .pr_usrreqs = &rip6_usrreqs
314 /* Spacer n-times for loadable protocols. */
326 .pr_domain = &inet6domain,
327 .pr_flags = PR_ATOMIC|PR_ADDR,
328 .pr_input = rip6_input,
329 .pr_output = rip6_output,
330 .pr_ctloutput = rip6_ctloutput,
331 .pr_usrreqs = &rip6_usrreqs
335 struct domain inet6domain = {
336 .dom_family = AF_INET6,
337 .dom_name = "internet6",
338 .dom_protosw = (struct protosw *)inet6sw,
339 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)],
340 .dom_rtattach = in6_inithead,
342 .dom_rtdetach = in6_detachhead,
344 .dom_ifattach = in6_domifattach,
345 .dom_ifdetach = in6_domifdetach,
346 .dom_ifmtu = in6_domifmtu
349 VNET_DOMAIN_SET(inet6);
352 * Internet configuration info
354 #ifndef IPV6FORWARDING
356 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
358 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
359 #endif /* GATEWAY6 */
360 #endif /* !IPV6FORWARDING */
362 #ifndef IPV6_SENDREDIRECTS
363 #define IPV6_SENDREDIRECTS 1
366 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */
367 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
368 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
369 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
370 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
371 VNET_DEFINE(int, ip6_no_radr) = 0;
372 VNET_DEFINE(int, ip6_norbit_raif) = 0;
373 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
374 VNET_DEFINE(int, ip6_log_interval) = 5;
375 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
377 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */
378 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
379 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
381 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix
382 * walk list every 5 sec. */
383 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */
384 VNET_DEFINE(int, ip6_v6only) = 1;
386 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
388 VNET_DEFINE(int, ip6stealth) = 0;
390 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
395 * BSDI4 defines these variables in in_proto.c...
396 * XXX: what if we don't define INET? Should we define pmtu6_expire
397 * or so? (jinmei@kame.net 19990310)
399 VNET_DEFINE(int, pmtu_expire) = 60*10;
400 VNET_DEFINE(int, pmtu_probe) = 60*2;
402 /* ICMPV6 parameters */
403 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
404 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
405 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */
406 /* control how to respond to NI queries */
407 VNET_DEFINE(int, icmp6_nodeinfo) =
408 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
409 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
412 * sysctl related items.
414 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
418 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
420 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
422 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
424 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
426 #if defined(SCTP) || defined(SCTP_SUPPORT)
427 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
430 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
431 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
437 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
441 val = V_ip6_temp_preferred_lifetime;
442 error = sysctl_handle_int(oidp, &val, 0, req);
443 if (error != 0 || !req->newptr)
445 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance)
447 V_ip6_temp_preferred_lifetime = val;
452 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
456 val = V_ip6_temp_valid_lifetime;
457 error = sysctl_handle_int(oidp, &val, 0, req);
458 if (error != 0 || !req->newptr)
460 if (val < V_ip6_temp_preferred_lifetime)
462 V_ip6_temp_valid_lifetime = val;
466 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
467 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
468 "Enable forwarding of IPv6 packets between interfaces");
469 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
470 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
471 "Send ICMPv6 redirects for unforwardable IPv6 packets");
472 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
473 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
474 "Default hop limit to use for outgoing IPv6 packets");
475 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
477 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
478 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
479 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
480 "Default value of per-interface flag for accepting ICMPv6 RA messages");
481 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
482 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
483 "Default value of per-interface flag to control whether routers "
484 "sending ICMPv6 RA messages on that interface are added into the "
485 "default router list");
486 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif,
487 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0,
488 "Always set clear the R flag in ICMPv6 NA messages when accepting RA "
490 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
491 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
492 "Accept the default router list from ICMPv6 RA messages even "
493 "when packet forwarding is enabled");
494 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
495 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
496 "Frequency in seconds at which to log IPv6 forwarding errors");
497 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
498 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
499 "Default maximum number of IPv6 extension headers permitted on "
500 "incoming IPv6 packets, 0 for no artificial limit");
501 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
502 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
503 "Number of ICMPv6 NS messages sent during duplicate address detection");
504 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
505 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
506 "Provide an IPv6 flowlabel in outbound packets");
507 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
508 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
509 "Default hop limit for IPv6 multicast packets originating from this "
511 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
512 CTLFLAG_RD, __KAME_VERSION, 0,
513 "KAME version string");
514 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
515 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
516 "Allow the use of addresses whose preferred lifetimes have expired");
517 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
518 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
519 ""); /* XXX unused */
520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
521 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
522 "Create RFC3041 temporary addresses for autoconfigured addresses");
523 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
524 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
525 NULL, 0, sysctl_ip6_temppltime, "I",
526 "Maximum preferred lifetime for temporary addresses");
527 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
528 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
529 NULL, 0, sysctl_ip6_tempvltime, "I",
530 "Maximum valid lifetime for temporary addresses");
531 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
532 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
533 "Restrict AF_INET6 sockets to IPv6 addresses only");
534 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
535 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
536 "Default value of per-interface flag for automatically adding an IPv6 "
537 "link-local address to interfaces when attached");
538 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats,
539 struct rip6stat, rip6stat,
540 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)");
541 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
542 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
543 "Prefer RFC3041 temporary addresses in source address selection");
544 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
545 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
546 "Use the default scope zone when none is specified");
547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu,
548 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0,
549 "Enable path MTU discovery for multicast packets");
551 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW,
552 &VNET_NAME(ip6stealth), 0,
553 "Forward IPv6 packets without decrementing their TTL");
556 /* net.inet6.icmp6 */
557 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
558 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
559 "Accept ICMPv6 redirect messages");
560 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
561 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0,
562 "Delay in seconds before expiring redirect route");
563 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats,
564 struct icmp6stat, icmp6stat,
565 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)");
566 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
567 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0,
568 "Frequency in seconds of checks for expired prefixes and routers");
569 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay,
570 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0,
571 "Delay in seconds before probing for reachability");
572 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
573 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
574 "Number of ICMPv6 NS messages sent during reachability detection");
575 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
576 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
577 "Number of ICMPv6 NS messages sent during address resolution");
578 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
579 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
580 "Create a loopback route when configuring an IPv6 address");
581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo,
582 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0,
583 "Mask of enabled RFC4620 node information query types");
584 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
585 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW,
586 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0,
587 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup "
588 "for compatibility with KAME implementation");
589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
590 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0,
591 "Maximum number of ICMPv6 error messages per second");
592 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
593 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0,
594 ""); /* XXX unused */
595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
596 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0,
597 "Log NDP debug messages");
598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
599 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW,
600 &VNET_NAME(nd6_onlink_ns_rfc4861), 0,
601 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861");
603 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
604 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW,
605 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0,
606 "Ignore the 'IPv6-Only flag' in RA messages in compliance with "
607 "draft-ietf-6man-ipv6only-flag");