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_mpath.h"
74 #include "opt_route.h"
76 #include <sys/param.h>
77 #include <sys/socket.h>
78 #include <sys/socketvar.h>
80 #include <sys/protosw.h>
82 #include <sys/kernel.h>
83 #include <sys/malloc.h>
84 #include <sys/domain.h>
86 #include <sys/systm.h>
87 #include <sys/sysctl.h>
90 #include <net/if_var.h>
91 #include <net/radix.h>
92 #include <net/route.h>
94 #include <netinet/in.h>
95 #include <netinet/in_systm.h>
96 #include <netinet/in_var.h>
97 #include <netinet/ip_encap.h>
98 #include <netinet/ip.h>
99 #include <netinet/ip_var.h>
100 #include <netinet/ip6.h>
101 #include <netinet6/ip6_var.h>
102 #include <netinet/icmp6.h>
104 #include <netinet/tcp.h>
105 #include <netinet/tcp_timer.h>
106 #include <netinet/tcp_var.h>
107 #include <netinet/udp.h>
108 #include <netinet/udp_var.h>
109 #include <netinet6/tcp6_var.h>
110 #include <netinet6/raw_ip6.h>
111 #include <netinet6/udp6_var.h>
112 #include <netinet6/pim6_var.h>
113 #include <netinet6/nd6.h>
116 #include <netinet/in_pcb.h>
117 #include <netinet/sctp_pcb.h>
118 #include <netinet/sctp.h>
119 #include <netinet/sctp_var.h>
120 #include <netinet6/sctp6_var.h>
123 #include <netinet6/ip6protosw.h>
126 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
128 FEATURE(inet6, "Internet Protocol version 6");
130 extern struct domain inet6domain;
131 static struct pr_usrreqs nousrreqs;
134 #define PR_ABRTACPTDIS 0
136 /* Spacer for loadable protocols. */
137 #define IP6PROTOSPACER \
139 .pr_domain = &inet6domain, \
140 .pr_protocol = PROTO_SPACER, \
141 .pr_usrreqs = &nousrreqs \
144 struct protosw inet6sw[] = {
147 .pr_domain = &inet6domain,
148 .pr_protocol = IPPROTO_IPV6,
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,
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|PR_LISTEN,
172 .pr_input = tcp6_input,
173 .pr_ctlinput = tcp6_ctlinput,
174 .pr_ctloutput = tcp_ctloutput,
175 #ifndef INET /* don't call initialization, timeout, and drain routines twice */
177 .pr_slowtimo = tcp_slowtimo,
178 .pr_drain = tcp_drain,
180 .pr_usrreqs = &tcp6_usrreqs,
184 .pr_type = SOCK_SEQPACKET,
185 .pr_domain = &inet6domain,
186 .pr_protocol = IPPROTO_SCTP,
187 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
188 .pr_input = sctp6_input,
189 .pr_ctlinput = sctp6_ctlinput,
190 .pr_ctloutput = sctp_ctloutput,
191 #ifndef INET /* Do not call initialization and drain routines twice. */
192 .pr_drain = sctp_drain,
193 .pr_init = sctp_init,
195 .pr_usrreqs = &sctp6_usrreqs
198 .pr_type = SOCK_STREAM,
199 .pr_domain = &inet6domain,
200 .pr_protocol = IPPROTO_SCTP,
201 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
202 .pr_input = sctp6_input,
203 .pr_ctlinput = sctp6_ctlinput,
204 .pr_ctloutput = sctp_ctloutput,
205 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */
206 .pr_usrreqs = &sctp6_usrreqs
210 .pr_type = SOCK_DGRAM,
211 .pr_domain = &inet6domain,
212 .pr_protocol = IPPROTO_UDPLITE,
213 .pr_flags = PR_ATOMIC|PR_ADDR,
214 .pr_input = udp6_input,
215 .pr_ctlinput = udplite6_ctlinput,
216 .pr_ctloutput = udp_ctloutput,
217 #ifndef INET /* Do not call initialization twice. */
218 .pr_init = udplite_init,
220 .pr_usrreqs = &udp6_usrreqs,
224 .pr_domain = &inet6domain,
225 .pr_protocol = IPPROTO_RAW,
226 .pr_flags = PR_ATOMIC|PR_ADDR,
227 .pr_input = rip6_input,
228 .pr_output = rip6_output,
229 .pr_ctlinput = rip6_ctlinput,
230 .pr_ctloutput = rip6_ctloutput,
231 #ifndef INET /* Do not call initialization twice. */
234 .pr_usrreqs = &rip6_usrreqs
238 .pr_domain = &inet6domain,
239 .pr_protocol = IPPROTO_ICMPV6,
240 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
241 .pr_input = icmp6_input,
242 .pr_output = rip6_output,
243 .pr_ctlinput = rip6_ctlinput,
244 .pr_ctloutput = rip6_ctloutput,
245 .pr_fasttimo = icmp6_fasttimo,
246 .pr_slowtimo = icmp6_slowtimo,
247 .pr_usrreqs = &rip6_usrreqs
251 .pr_domain = &inet6domain,
252 .pr_protocol = IPPROTO_DSTOPTS,
253 .pr_flags = PR_ATOMIC|PR_ADDR,
254 .pr_input = dest6_input,
255 .pr_usrreqs = &nousrreqs
259 .pr_domain = &inet6domain,
260 .pr_protocol = IPPROTO_ROUTING,
261 .pr_flags = PR_ATOMIC|PR_ADDR,
262 .pr_input = route6_input,
263 .pr_usrreqs = &nousrreqs
267 .pr_domain = &inet6domain,
268 .pr_protocol = IPPROTO_FRAGMENT,
269 .pr_flags = PR_ATOMIC|PR_ADDR,
270 .pr_input = frag6_input,
271 .pr_usrreqs = &nousrreqs
276 .pr_domain = &inet6domain,
277 .pr_protocol = IPPROTO_IPV4,
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
287 .pr_domain = &inet6domain,
288 .pr_protocol = IPPROTO_IPV6,
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_usrreqs = &rip6_usrreqs
297 .pr_domain = &inet6domain,
298 .pr_protocol = IPPROTO_GRE,
299 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
300 .pr_input = encap6_input,
301 .pr_output = rip6_output,
302 .pr_ctloutput = rip6_ctloutput,
303 .pr_usrreqs = &rip6_usrreqs
307 .pr_domain = &inet6domain,
308 .pr_protocol = IPPROTO_PIM,
309 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
310 .pr_input = encap6_input,
311 .pr_output = rip6_output,
312 .pr_ctloutput = rip6_ctloutput,
313 .pr_usrreqs = &rip6_usrreqs
315 /* Spacer n-times for loadable protocols. */
327 .pr_domain = &inet6domain,
328 .pr_flags = PR_ATOMIC|PR_ADDR,
329 .pr_input = rip6_input,
330 .pr_output = rip6_output,
331 .pr_ctloutput = rip6_ctloutput,
332 .pr_usrreqs = &rip6_usrreqs
336 extern int in6_inithead(void **, int, u_int);
338 extern int in6_detachhead(void **, int);
341 struct domain inet6domain = {
342 .dom_family = AF_INET6,
343 .dom_name = "internet6",
344 .dom_protosw = (struct protosw *)inet6sw,
345 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)],
346 .dom_rtattach = in6_inithead,
348 .dom_rtdetach = in6_detachhead,
350 .dom_ifattach = in6_domifattach,
351 .dom_ifdetach = in6_domifdetach,
352 .dom_ifmtu = in6_domifmtu
355 VNET_DOMAIN_SET(inet6);
358 * Internet configuration info
360 #ifndef IPV6FORWARDING
362 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
364 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
365 #endif /* GATEWAY6 */
366 #endif /* !IPV6FORWARDING */
368 #ifndef IPV6_SENDREDIRECTS
369 #define IPV6_SENDREDIRECTS 1
372 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */
373 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
374 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
375 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
376 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
377 VNET_DEFINE(int, ip6_no_radr) = 0;
378 VNET_DEFINE(int, ip6_norbit_raif) = 0;
379 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
380 VNET_DEFINE(int, ip6_log_interval) = 5;
381 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
383 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */
384 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
385 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
387 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix
388 * walk list every 5 sec. */
389 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */
390 VNET_DEFINE(int, ip6_v6only) = 1;
392 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
394 VNET_DEFINE(int, ip6stealth) = 0;
396 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
401 * BSDI4 defines these variables in in_proto.c...
402 * XXX: what if we don't define INET? Should we define pmtu6_expire
403 * or so? (jinmei@kame.net 19990310)
405 VNET_DEFINE(int, pmtu_expire) = 60*10;
406 VNET_DEFINE(int, pmtu_probe) = 60*2;
408 /* ICMPV6 parameters */
409 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
410 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
411 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */
412 /* control how to respond to NI queries */
413 VNET_DEFINE(int, icmp6_nodeinfo) =
414 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
415 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
418 * sysctl related items.
420 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
424 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
426 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
428 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
430 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
433 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
436 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
437 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
443 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
447 val = V_ip6_temp_preferred_lifetime;
448 error = sysctl_handle_int(oidp, &val, 0, req);
449 if (error != 0 || !req->newptr)
451 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance)
453 V_ip6_temp_preferred_lifetime = val;
458 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
462 val = V_ip6_temp_valid_lifetime;
463 error = sysctl_handle_int(oidp, &val, 0, req);
464 if (error != 0 || !req->newptr)
466 if (val < V_ip6_temp_preferred_lifetime)
468 V_ip6_temp_valid_lifetime = val;
472 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
473 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
474 "Enable forwarding of IPv6 packets between interfaces");
475 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
476 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
477 "Send ICMPv6 redirects for unforwardable IPv6 packets");
478 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
479 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
480 "Default hop limit to use for outgoing IPv6 packets");
481 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
483 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
484 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
485 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
486 "Default value of per-interface flag for accepting ICMPv6 RA messages");
487 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
488 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
489 "Default value of per-interface flag to control whether routers "
490 "sending ICMPv6 RA messages on that interface are added into the "
491 "default router list");
492 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif,
493 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0,
494 "Always set clear the R flag in ICMPv6 NA messages when accepting RA "
496 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
497 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
498 "Accept the default router list from ICMPv6 RA messages even "
499 "when packet forwarding is enabled");
500 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
501 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
502 "Frequency in seconds at which to log IPv6 forwarding errors");
503 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
504 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
505 "Default maximum number of IPv6 extension headers permitted on "
506 "incoming IPv6 packets, 0 for no artificial limit");
507 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
508 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
509 "Number of ICMPv6 NS messages sent during duplicate address detection");
510 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
511 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
512 "Provide an IPv6 flowlabel in outbound packets");
513 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
514 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
515 "Default hop limit for IPv6 multicast packets originating from this "
517 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
518 CTLFLAG_RD, __KAME_VERSION, 0,
519 "KAME version string");
520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
521 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
522 "Allow the use of addresses whose preferred lifetimes have expired");
523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
524 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
525 ""); /* XXX unused */
526 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
527 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
528 "Create RFC3041 temporary addresses for autoconfigured addresses");
529 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
530 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
531 NULL, 0, sysctl_ip6_temppltime, "I",
532 "Maximum preferred lifetime for temporary addresses");
533 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
534 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
535 NULL, 0, sysctl_ip6_tempvltime, "I",
536 "Maximum valid lifetime for temporary addresses");
537 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
538 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
539 "Restrict AF_INET6 sockets to IPv6 addresses only");
540 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
541 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
542 "Default value of per-interface flag for automatically adding an IPv6 "
543 "link-local address to interfaces when attached");
544 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats,
545 struct rip6stat, rip6stat,
546 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)");
547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
548 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
549 "Prefer RFC3041 temporary addresses in source address selection");
550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
551 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
552 "Use the default scope zone when none is specified");
553 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu,
554 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0,
555 "Enable path MTU discovery for multicast packets");
557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW,
558 &VNET_NAME(ip6stealth), 0,
559 "Forward IPv6 packets without decrementing their TTL");
562 /* net.inet6.icmp6 */
563 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
564 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
565 "Accept ICMPv6 redirect messages");
566 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
567 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0,
568 "Delay in seconds before expiring redirect route");
569 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats,
570 struct icmp6stat, icmp6stat,
571 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)");
572 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
573 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0,
574 "Frequency in seconds of checks for expired prefixes and routers");
575 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay,
576 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0,
577 "Delay in seconds before probing for reachability");
578 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
579 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
580 "Number of ICMPv6 NS messages sent during reachability detection");
581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
582 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
583 "Number of ICMPv6 NS messages sent during address resolution");
584 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
585 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
586 "Create a loopback route when configuring an IPv6 address");
587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo,
588 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0,
589 "Mask of enabled RF4620 node information query types");
590 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
591 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW,
592 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0,
593 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup "
594 "for compatibility with KAME implementation");
595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
596 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0,
597 "Maximum number of ICMPv6 error messages per second");
598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
599 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0,
600 ""); /* XXX unused */
601 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
602 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0,
603 "Log NDP debug messages");
604 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
605 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW,
606 &VNET_NAME(nd6_onlink_ns_rfc4861), 0,
607 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861");
609 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
610 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW,
611 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0,
612 "Ignore the 'IPv6-Only flag' in RA messages in compliance with "
613 "draft-ietf-6man-ipv6only-flag");