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 __FBSDID("$FreeBSD: stable/12/sys/netinet6/in6_proto.c 373226 2023-10-02 09:10:21Z zlei $");
67
68 #include "opt_inet.h"
69 #include "opt_inet6.h"
70 #include "opt_ipsec.h"
71 #include "opt_ipstealth.h"
72 #include "opt_sctp.h"
73 #include "opt_mpath.h"
74 #include "opt_route.h"
75
76 #include <sys/param.h>
77 #include <sys/socket.h>
78 #include <sys/socketvar.h>
79 #include <sys/proc.h>
80 #include <sys/protosw.h>
81 #include <sys/jail.h>
82 #include <sys/kernel.h>
83 #include <sys/malloc.h>
84 #include <sys/domain.h>
85 #include <sys/mbuf.h>
86 #include <sys/systm.h>
87 #include <sys/sysctl.h>
88
89 #include <net/if.h>
90 #include <net/if_var.h>
91 #include <net/radix.h>
92 #include <net/route.h>
93 #ifdef RADIX_MPATH
94 #include <net/radix_mpath.h>
95 #endif
96
97 #include <netinet/in.h>
98 #include <netinet/in_systm.h>
99 #include <netinet/in_var.h>
100 #include <netinet/ip_encap.h>
101 #include <netinet/ip.h>
102 #include <netinet/ip_var.h>
103 #include <netinet/ip6.h>
104 #include <netinet6/ip6_var.h>
105 #include <netinet/icmp6.h>
106
107 #include <netinet/tcp.h>
108 #include <netinet/tcp_timer.h>
109 #include <netinet/tcp_var.h>
110 #include <netinet/udp.h>
111 #include <netinet/udp_var.h>
112 #include <netinet6/tcp6_var.h>
113 #include <netinet6/raw_ip6.h>
114 #include <netinet6/udp6_var.h>
115 #include <netinet6/pim6_var.h>
116 #include <netinet6/nd6.h>
117
118 #ifdef SCTP
119 #include <netinet/in_pcb.h>
120 #include <netinet/sctp_pcb.h>
121 #include <netinet/sctp.h>
122 #include <netinet/sctp_var.h>
123 #include <netinet6/sctp6_var.h>
124 #endif /* SCTP */
125
126 #include <netinet6/ip6protosw.h>
127
128 /*
129 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
130 */
131 FEATURE(inet6, "Internet Protocol version 6");
132
133 extern struct domain inet6domain;
134 static struct pr_usrreqs nousrreqs;
135
136 #define PR_LISTEN 0
137 #define PR_ABRTACPTDIS 0
138
139 /* Spacer for loadable protocols. */
140 #define IP6PROTOSPACER \
141 { \
142 .pr_domain = &inet6domain, \
143 .pr_protocol = PROTO_SPACER, \
144 .pr_usrreqs = &nousrreqs \
145 }
146
147 struct protosw inet6sw[] = {
148 {
149 .pr_type = 0,
150 .pr_domain = &inet6domain,
151 .pr_protocol = IPPROTO_IPV6,
152 .pr_init = ip6_init,
153 .pr_slowtimo = frag6_slowtimo,
154 .pr_drain = frag6_drain,
155 .pr_usrreqs = &nousrreqs,
156 },
157 {
158 .pr_type = SOCK_DGRAM,
159 .pr_domain = &inet6domain,
160 .pr_protocol = IPPROTO_UDP,
161 .pr_flags = PR_ATOMIC|PR_ADDR,
162 .pr_input = udp6_input,
163 .pr_ctlinput = udp6_ctlinput,
164 .pr_ctloutput = ip6_ctloutput,
165 #ifndef INET /* Do not call initialization twice. */
166 .pr_init = udp_init,
167 #endif
168 .pr_usrreqs = &udp6_usrreqs,
169 },
170 {
171 .pr_type = SOCK_STREAM,
172 .pr_domain = &inet6domain,
173 .pr_protocol = IPPROTO_TCP,
174 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_LISTEN,
175 .pr_input = tcp6_input,
176 .pr_ctlinput = tcp6_ctlinput,
177 .pr_ctloutput = tcp_ctloutput,
178 #ifndef INET /* don't call initialization and timeout routines twice */
179 .pr_init = tcp_init,
180 .pr_slowtimo = tcp_slowtimo,
181 #endif
182 .pr_drain = tcp_drain,
183 .pr_usrreqs = &tcp6_usrreqs,
184 },
185 #ifdef SCTP
186 {
187 .pr_type = SOCK_SEQPACKET,
188 .pr_domain = &inet6domain,
189 .pr_protocol = IPPROTO_SCTP,
190 .pr_flags = PR_WANTRCVD|PR_LASTHDR,
191 .pr_input = sctp6_input,
192 .pr_ctlinput = sctp6_ctlinput,
193 .pr_ctloutput = sctp_ctloutput,
194 .pr_drain = sctp_drain,
195 #ifndef INET /* Do not call initialization twice. */
196 .pr_init = sctp_init,
197 #endif
198 .pr_usrreqs = &sctp6_usrreqs
199 },
200 {
201 .pr_type = SOCK_STREAM,
202 .pr_domain = &inet6domain,
203 .pr_protocol = IPPROTO_SCTP,
204 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
205 .pr_input = sctp6_input,
206 .pr_ctlinput = sctp6_ctlinput,
207 .pr_ctloutput = sctp_ctloutput,
208 .pr_drain = sctp_drain,
209 .pr_usrreqs = &sctp6_usrreqs
210 },
211 #endif /* SCTP */
212 {
213 .pr_type = SOCK_DGRAM,
214 .pr_domain = &inet6domain,
215 .pr_protocol = IPPROTO_UDPLITE,
216 .pr_flags = PR_ATOMIC|PR_ADDR,
217 .pr_input = udp6_input,
218 .pr_ctlinput = udplite6_ctlinput,
219 .pr_ctloutput = udp_ctloutput,
220 #ifndef INET /* Do not call initialization twice. */
221 .pr_init = udplite_init,
222 #endif
223 .pr_usrreqs = &udp6_usrreqs,
224 },
225 {
226 .pr_type = SOCK_RAW,
227 .pr_domain = &inet6domain,
228 .pr_protocol = IPPROTO_RAW,
229 .pr_flags = PR_ATOMIC|PR_ADDR,
230 .pr_input = rip6_input,
231 .pr_output = rip6_output,
232 .pr_ctlinput = rip6_ctlinput,
233 .pr_ctloutput = rip6_ctloutput,
234 #ifndef INET /* Do not call initialization twice. */
235 .pr_init = rip_init,
236 #endif
237 .pr_usrreqs = &rip6_usrreqs
238 },
239 {
240 .pr_type = SOCK_RAW,
241 .pr_domain = &inet6domain,
242 .pr_protocol = IPPROTO_ICMPV6,
243 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
244 .pr_input = icmp6_input,
245 .pr_output = rip6_output,
246 .pr_ctlinput = rip6_ctlinput,
247 .pr_ctloutput = rip6_ctloutput,
248 .pr_fasttimo = icmp6_fasttimo,
249 .pr_slowtimo = icmp6_slowtimo,
250 .pr_usrreqs = &rip6_usrreqs
251 },
252 {
253 .pr_type = SOCK_RAW,
254 .pr_domain = &inet6domain,
255 .pr_protocol = IPPROTO_DSTOPTS,
256 .pr_flags = PR_ATOMIC|PR_ADDR,
257 .pr_input = dest6_input,
258 .pr_usrreqs = &nousrreqs
259 },
260 {
261 .pr_type = SOCK_RAW,
262 .pr_domain = &inet6domain,
263 .pr_protocol = IPPROTO_ROUTING,
264 .pr_flags = PR_ATOMIC|PR_ADDR,
265 .pr_input = route6_input,
266 .pr_usrreqs = &nousrreqs
267 },
268 {
269 .pr_type = SOCK_RAW,
270 .pr_domain = &inet6domain,
271 .pr_protocol = IPPROTO_FRAGMENT,
272 .pr_flags = PR_ATOMIC|PR_ADDR,
273 .pr_input = frag6_input,
274 .pr_usrreqs = &nousrreqs
275 },
276 #ifdef INET
277 {
278 .pr_type = SOCK_RAW,
279 .pr_domain = &inet6domain,
280 .pr_protocol = IPPROTO_IPV4,
281 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
282 .pr_input = encap6_input,
283 .pr_output = rip6_output,
284 .pr_ctloutput = rip6_ctloutput,
285 .pr_usrreqs = &rip6_usrreqs
286 },
287 #endif /* INET */
288 {
289 .pr_type = SOCK_RAW,
290 .pr_domain = &inet6domain,
291 .pr_protocol = IPPROTO_IPV6,
292 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
293 .pr_input = encap6_input,
294 .pr_output = rip6_output,
295 .pr_ctloutput = rip6_ctloutput,
296 .pr_usrreqs = &rip6_usrreqs
297 },
298 {
299 .pr_type = SOCK_RAW,
300 .pr_domain = &inet6domain,
301 .pr_protocol = IPPROTO_ETHERIP,
302 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
303 .pr_input = encap6_input,
304 .pr_ctloutput = rip6_ctloutput,
305 .pr_usrreqs = &rip6_usrreqs
306 },
307 {
308 .pr_type = SOCK_RAW,
309 .pr_domain = &inet6domain,
310 .pr_protocol = IPPROTO_GRE,
311 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
312 .pr_input = encap6_input,
313 .pr_output = rip6_output,
314 .pr_ctloutput = rip6_ctloutput,
315 .pr_usrreqs = &rip6_usrreqs
316 },
317 {
318 .pr_type = SOCK_RAW,
319 .pr_domain = &inet6domain,
320 .pr_protocol = IPPROTO_PIM,
321 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
322 .pr_input = encap6_input,
323 .pr_output = rip6_output,
324 .pr_ctloutput = rip6_ctloutput,
325 .pr_usrreqs = &rip6_usrreqs
326 },
327 /* Spacer n-times for loadable protocols. */
328 IP6PROTOSPACER,
329 IP6PROTOSPACER,
330 IP6PROTOSPACER,
331 IP6PROTOSPACER,
332 IP6PROTOSPACER,
333 IP6PROTOSPACER,
334 IP6PROTOSPACER,
335 IP6PROTOSPACER,
336 /* raw wildcard */
337 {
338 .pr_type = SOCK_RAW,
339 .pr_domain = &inet6domain,
340 .pr_flags = PR_ATOMIC|PR_ADDR,
341 .pr_input = rip6_input,
342 .pr_output = rip6_output,
343 .pr_ctloutput = rip6_ctloutput,
344 .pr_usrreqs = &rip6_usrreqs
345 },
346 };
347
348 extern int in6_inithead(void **, int);
349 #ifdef VIMAGE
350 extern int in6_detachhead(void **, int);
351 #endif
352
353 struct domain inet6domain = {
354 .dom_family = AF_INET6,
355 .dom_name = "internet6",
356 .dom_protosw = (struct protosw *)inet6sw,
357 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)],
358 #ifdef RADIX_MPATH
359 .dom_rtattach = rn6_mpath_inithead,
360 #else
361 .dom_rtattach = in6_inithead,
362 #endif
363 #ifdef VIMAGE
364 .dom_rtdetach = in6_detachhead,
365 #endif
366 .dom_ifattach = in6_domifattach,
367 .dom_ifdetach = in6_domifdetach,
368 .dom_ifmtu = in6_domifmtu
369 };
370
371 VNET_DOMAIN_SET(inet6);
372
373 /*
374 * Internet configuration info
375 */
376 #ifndef IPV6FORWARDING
377 #ifdef GATEWAY6
378 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
379 #else
380 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
381 #endif /* GATEWAY6 */
382 #endif /* !IPV6FORWARDING */
383
384 #ifndef IPV6_SENDREDIRECTS
385 #define IPV6_SENDREDIRECTS 1
386 #endif
387
388 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */
389 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
390 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
391 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
392 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
393 VNET_DEFINE(int, ip6_no_radr) = 0;
394 VNET_DEFINE(int, ip6_norbit_raif) = 0;
395 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
396 VNET_DEFINE(int, ip6_log_interval) = 5;
397 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
398 * process? */
399 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */
400 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
401 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
402 * (RFC2462 5.5.4) */
403 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix
404 * walk list every 5 sec. */
405 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */
406 VNET_DEFINE(int, ip6_v6only) = 1;
407
408 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
409 #ifdef IPSTEALTH
410 VNET_DEFINE(int, ip6stealth) = 0;
411 #endif
412 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
413 * (RFC 4861) */
414
415 /* icmp6 */
416 /*
417 * BSDI4 defines these variables in in_proto.c...
418 * XXX: what if we don't define INET? Should we define pmtu6_expire
419 * or so? (jinmei@kame.net 19990310)
420 */
421 VNET_DEFINE(int, pmtu_expire) = 60*10;
422 VNET_DEFINE(int, pmtu_probe) = 60*2;
423
424 /* ICMPV6 parameters */
425 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
426 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
427 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */
428 /* control how to respond to NI queries */
429 VNET_DEFINE(int, icmp6_nodeinfo) =
430 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
431 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
432
433 /*
434 * sysctl related items.
435 */
436 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0,
437 "Internet6 Family");
438
439 /* net.inet6 */
440 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
441 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6");
442 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6");
443 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6");
444 #if defined(SCTP) || defined(SCTP_SUPPORT)
445 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW, 0, "SCTP6");
446 #endif
447 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
448 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6");
449 #endif /* IPSEC */
450
451 /* net.inet6.ip6 */
452 static int
sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)453 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
454 {
455 int error, val;
456
457 val = V_ip6_temp_preferred_lifetime;
458 error = sysctl_handle_int(oidp, &val, 0, req);
459 if (error != 0 || !req->newptr)
460 return (error);
461 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance)
462 return (EINVAL);
463 V_ip6_temp_preferred_lifetime = val;
464 return (0);
465 }
466
467 static int
sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)468 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
469 {
470 int error, val;
471
472 val = V_ip6_temp_valid_lifetime;
473 error = sysctl_handle_int(oidp, &val, 0, req);
474 if (error != 0 || !req->newptr)
475 return (error);
476 if (val < V_ip6_temp_preferred_lifetime)
477 return (EINVAL);
478 V_ip6_temp_valid_lifetime = val;
479 return (0);
480 }
481
482 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
483 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
484 "Enable forwarding of IPv6 packets between interfaces");
485 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
486 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
487 "Send ICMPv6 redirects for unforwardable IPv6 packets");
488 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
489 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
490 "Default hop limit to use for outgoing IPv6 packets");
491 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
492 ip6stat,
493 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
494 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
495 CTLFLAG_VNET | CTLFLAG_RWTUN, &VNET_NAME(ip6_accept_rtadv), 0,
496 "Default value of per-interface flag for accepting ICMPv6 RA messages");
497 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
498 CTLFLAG_VNET | CTLFLAG_RWTUN, &VNET_NAME(ip6_no_radr), 0,
499 "Default value of per-interface flag to control whether routers "
500 "sending ICMPv6 RA messages on that interface are added into the "
501 "default router list");
502 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif,
503 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0,
504 "Always set clear the R flag in ICMPv6 NA messages when accepting RA "
505 "on the interface");
506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
508 "Accept the default router list from ICMPv6 RA messages even "
509 "when packet forwarding is enabled");
510 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
511 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
512 "Frequency in seconds at which to log IPv6 forwarding errors");
513 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
514 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
515 "Default maximum number of IPv6 extension headers permitted on "
516 "incoming IPv6 packets, 0 for no artificial limit");
517 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
518 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
519 "Number of ICMPv6 NS messages sent during duplicate address detection");
520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
521 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
522 "Provide an IPv6 flowlabel in outbound packets");
523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
524 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
525 "Default hop limit for IPv6 multicast packets originating from this "
526 "node");
527 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
528 CTLFLAG_RD, __KAME_VERSION, 0,
529 "KAME version string");
530 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
531 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
532 "Allow the use of addresses whose preferred lifetimes have expired");
533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
534 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
535 ""); /* XXX unused */
536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
538 "Create RFC3041 temporary addresses for autoconfigured addresses");
539 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
540 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
541 NULL, 0, sysctl_ip6_temppltime, "I",
542 "Maximum preferred lifetime for temporary addresses");
543 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
544 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
545 NULL, 0, sysctl_ip6_tempvltime, "I",
546 "Maximum valid lifetime for temporary addresses");
547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
548 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
549 "Restrict AF_INET6 sockets to IPv6 addresses only");
550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
551 CTLFLAG_VNET | CTLFLAG_RWTUN, &VNET_NAME(ip6_auto_linklocal), 0,
552 "Default value of per-interface flag for automatically adding an IPv6 "
553 "link-local address to interfaces when attached");
554 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats,
555 struct rip6stat, rip6stat,
556 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)");
557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
558 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
559 "Prefer RFC3041 temporary addresses in source address selection");
560 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
561 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
562 "Use the default scope zone when none is specified");
563 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu,
564 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0,
565 "Enable path MTU discovery for multicast packets");
566 #ifdef IPSTEALTH
567 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW,
568 &VNET_NAME(ip6stealth), 0,
569 "Forward IPv6 packets without decrementing their TTL");
570 #endif
571
572 /* net.inet6.icmp6 */
573 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
574 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
575 "Accept ICMPv6 redirect messages");
576 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
577 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0,
578 ""); /* XXX unused */
579 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats,
580 struct icmp6stat, icmp6stat,
581 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)");
582 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
583 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0,
584 "Frequency in seconds of checks for expired prefixes and routers");
585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay,
586 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0,
587 "Delay in seconds before probing for reachability");
588 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
589 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
590 "Number of ICMPv6 NS messages sent during reachability detection");
591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
592 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
593 "Number of ICMPv6 NS messages sent during address resolution");
594 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
595 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
596 "Create a loopback route when configuring an IPv6 address");
597 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo,
598 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0,
599 "Mask of enabled RFC4620 node information query types");
600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
601 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW,
602 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0,
603 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup "
604 "for compatibility with KAME implementation");
605 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
606 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0,
607 "Maximum number of ICMPv6 error messages per second");
608 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
609 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0,
610 ""); /* XXX unused */
611 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
612 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0,
613 "Log NDP debug messages");
614 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
615 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW,
616 &VNET_NAME(nd6_onlink_ns_rfc4861), 0,
617 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861");
618