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