1 /*
2 * Copyright (c) 2008-2020 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 /*
30 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. Neither the name of the project nor the names of its contributors
42 * may be used to endorse or promote products derived from this software
43 * without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57
58 /*
59 * Copyright (c) 1982, 1986, 1993
60 * The Regents of the University of California. All rights reserved.
61 *
62 * Redistribution and use in source and binary forms, with or without
63 * modification, are permitted provided that the following conditions
64 * are met:
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in the
69 * documentation and/or other materials provided with the distribution.
70 * 3. All advertising materials mentioning features or use of this software
71 * must display the following acknowledgement:
72 * This product includes software developed by the University of
73 * California, Berkeley and its contributors.
74 * 4. Neither the name of the University nor the names of its contributors
75 * may be used to endorse or promote products derived from this software
76 * without specific prior written permission.
77 *
78 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
79 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
80 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
81 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
82 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
83 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
84 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
88 * SUCH DAMAGE.
89 *
90 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93
91 */
92
93
94 #include <sys/param.h>
95 #include <sys/socket.h>
96 #include <sys/socketvar.h>
97 #include <sys/protosw.h>
98 #include <sys/kernel.h>
99 #include <sys/domain.h>
100 #include <sys/mbuf.h>
101 #include <sys/systm.h>
102 #include <sys/sysctl.h>
103
104 #include <net/if.h>
105 #include <net/radix.h>
106 #include <net/route.h>
107 #include <net/nat464_utils.h>
108
109 #include <netinet/in.h>
110 #include <netinet/in_systm.h>
111 #include <netinet/in_var.h>
112 #include <netinet/ip_encap.h>
113 #include <netinet/ip.h>
114 #include <netinet/ip_var.h>
115 #include <netinet/ip6.h>
116 #include <netinet6/ip6_var.h>
117 #include <netinet6/in6_var.h>
118 #include <netinet/icmp6.h>
119
120 #include <netinet/tcp.h>
121 #include <netinet/tcp_timer.h>
122 #include <netinet/tcp_var.h>
123 #include <netinet/udp.h>
124 #include <netinet/udp_var.h>
125 #include <netinet6/tcp6_var.h>
126 #include <netinet6/raw_ip6.h>
127 #include <netinet6/udp6_var.h>
128 #include <netinet6/nd6.h>
129 #include <netinet6/mld6_var.h>
130
131 #if IPSEC
132 #include <netinet6/ipsec.h>
133 #include <netinet6/ipsec6.h>
134 #include <netinet6/ah.h>
135 #include <netinet6/ah6.h>
136 #if IPSEC_ESP
137 #include <netinet6/esp.h>
138 #include <netinet6/esp6.h>
139 #endif
140 #endif /*IPSEC*/
141
142 #include <netinet6/ip6protosw.h>
143
144 #include <net/net_osdep.h>
145
146 /*
147 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
148 */
149
150 extern struct domain inet6domain_s;
151 struct domain *inet6domain = NULL;
152
153 static struct pr_usrreqs nousrreqs;
154 lck_mtx_t *inet6_domain_mutex;
155
156 static void in6_dinit(struct domain *);
157 static int rip6_pr_output(struct mbuf *, struct socket *,
158 struct sockaddr_in6 *, struct mbuf *);
159
160 struct ip6protosw inet6sw[] = {
161 {
162 .pr_type = 0,
163 .pr_protocol = IPPROTO_IPV6,
164 .pr_init = ip6_init,
165 .pr_drain = ip6_drain,
166 .pr_usrreqs = &nousrreqs,
167 },
168 {
169 .pr_type = SOCK_DGRAM,
170 .pr_protocol = IPPROTO_UDP,
171 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK | PR_PCBLOCK |
172 PR_EVCONNINFO | PR_PRECONN_WRITE,
173 .pr_input = udp6_input,
174 .pr_ctlinput = udp6_ctlinput,
175 .pr_ctloutput = udp_ctloutput,
176 #if !INET /* don't call initialization twice */
177 .pr_init = udp_init,
178 #endif /* !INET */
179 .pr_usrreqs = &udp6_usrreqs,
180 .pr_lock = udp_lock,
181 .pr_unlock = udp_unlock,
182 .pr_getlock = udp_getlock,
183 .pr_update_last_owner = inp_update_last_owner,
184 .pr_copy_last_owner = inp_copy_last_owner,
185 },
186 {
187 .pr_type = SOCK_STREAM,
188 .pr_protocol = IPPROTO_TCP,
189 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_PCBLOCK |
190 PR_PROTOLOCK | PR_DISPOSE | PR_EVCONNINFO |
191 PR_PRECONN_WRITE | PR_DATA_IDEMPOTENT,
192 .pr_input = tcp6_input,
193 .pr_ctlinput = tcp6_ctlinput,
194 .pr_ctloutput = tcp_ctloutput,
195 #if !INET /* don't call initialization and timeout routines twice */
196 .pr_init = tcp_init,
197 #endif /* !INET */
198 .pr_drain = tcp_drain,
199 .pr_usrreqs = &tcp6_usrreqs,
200 .pr_lock = tcp_lock,
201 .pr_unlock = tcp_unlock,
202 .pr_getlock = tcp_getlock,
203 .pr_update_last_owner = inp_update_last_owner,
204 .pr_copy_last_owner = inp_copy_last_owner,
205 },
206 {
207 .pr_type = SOCK_RAW,
208 .pr_protocol = IPPROTO_RAW,
209 .pr_flags = PR_ATOMIC | PR_ADDR,
210 .pr_input = rip6_input,
211 .pr_output = rip6_pr_output,
212 .pr_ctlinput = rip6_ctlinput,
213 .pr_ctloutput = rip6_ctloutput,
214 #if !INET /* don't call initialization and timeout routines twice */
215 .pr_init = rip_init,
216 #endif /* !INET */
217 .pr_usrreqs = &rip6_usrreqs,
218 .pr_unlock = rip_unlock,
219 .pr_update_last_owner = inp_update_last_owner,
220 .pr_copy_last_owner = inp_copy_last_owner,
221 },
222 {
223 .pr_type = SOCK_RAW,
224 .pr_protocol = IPPROTO_ICMPV6,
225 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
226 .pr_input = icmp6_input,
227 .pr_output = rip6_pr_output,
228 .pr_ctlinput = rip6_ctlinput,
229 .pr_ctloutput = rip6_ctloutput,
230 .pr_init = icmp6_init,
231 .pr_usrreqs = &rip6_usrreqs,
232 .pr_unlock = rip_unlock,
233 .pr_update_last_owner = inp_update_last_owner,
234 .pr_copy_last_owner = inp_copy_last_owner,
235 },
236 {
237 .pr_type = SOCK_DGRAM,
238 .pr_protocol = IPPROTO_ICMPV6,
239 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
240 .pr_input = icmp6_input,
241 .pr_output = rip6_pr_output,
242 .pr_ctlinput = rip6_ctlinput,
243 .pr_ctloutput = icmp6_dgram_ctloutput,
244 .pr_init = icmp6_init,
245 .pr_usrreqs = &icmp6_dgram_usrreqs,
246 .pr_unlock = rip_unlock,
247 .pr_update_last_owner = inp_update_last_owner,
248 .pr_copy_last_owner = inp_copy_last_owner,
249 },
250 {
251 .pr_type = SOCK_RAW,
252 .pr_protocol = IPPROTO_DSTOPTS,
253 .pr_flags = PR_ATOMIC | PR_ADDR,
254 .pr_input = dest6_input,
255 .pr_usrreqs = &nousrreqs,
256 },
257 {
258 .pr_type = SOCK_RAW,
259 .pr_protocol = IPPROTO_ROUTING,
260 .pr_flags = PR_ATOMIC | PR_ADDR,
261 .pr_input = route6_input,
262 .pr_usrreqs = &nousrreqs,
263 },
264 {
265 .pr_type = SOCK_RAW,
266 .pr_protocol = IPPROTO_FRAGMENT,
267 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
268 .pr_input = frag6_input,
269 .pr_usrreqs = &nousrreqs,
270 },
271 #if IPSEC
272 {
273 .pr_type = SOCK_RAW,
274 .pr_protocol = IPPROTO_AH,
275 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
276 .pr_input = ah6_input,
277 .pr_usrreqs = &nousrreqs,
278 },
279 #if IPSEC_ESP
280 {
281 .pr_type = SOCK_RAW,
282 .pr_protocol = IPPROTO_ESP,
283 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
284 .pr_input = esp6_input,
285 .pr_ctlinput = esp6_ctlinput,
286 .pr_usrreqs = &nousrreqs,
287 },
288 #endif /* IPSEC_ESP */
289 #endif /* IPSEC */
290 #if INET
291 {
292 .pr_type = SOCK_RAW,
293 .pr_protocol = IPPROTO_IPV4,
294 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
295 .pr_input = encap6_input,
296 .pr_output = rip6_pr_output,
297 .pr_ctloutput = rip6_ctloutput,
298 .pr_usrreqs = &rip6_usrreqs,
299 .pr_unlock = rip_unlock,
300 .pr_update_last_owner = inp_update_last_owner,
301 .pr_copy_last_owner = inp_copy_last_owner,
302 },
303 #endif /*INET*/
304 {
305 .pr_type = SOCK_RAW,
306 .pr_protocol = IPPROTO_IPV6,
307 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
308 .pr_input = encap6_input,
309 .pr_output = rip6_pr_output,
310 .pr_ctloutput = rip6_ctloutput,
311 .pr_usrreqs = &rip6_usrreqs,
312 .pr_unlock = rip_unlock,
313 .pr_update_last_owner = inp_update_last_owner,
314 .pr_copy_last_owner = inp_copy_last_owner,
315 },
316 /* raw wildcard */
317 {
318 .pr_type = SOCK_RAW,
319 .pr_protocol = 0,
320 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
321 .pr_input = rip6_input,
322 .pr_output = rip6_pr_output,
323 .pr_ctloutput = rip6_ctloutput,
324 .pr_usrreqs = &rip6_usrreqs,
325 .pr_unlock = rip_unlock,
326 .pr_update_last_owner = inp_update_last_owner,
327 .pr_copy_last_owner = inp_copy_last_owner,
328 },
329 };
330
331 int in6_proto_count = (sizeof(inet6sw) / sizeof(struct ip6protosw));
332
333 struct domain inet6domain_s = {
334 .dom_family = PF_INET6,
335 .dom_flags = DOM_REENTRANT,
336 .dom_name = "internet6",
337 .dom_init = in6_dinit,
338 .dom_rtattach = in6_inithead,
339 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3,
340 .dom_maxrtkey = sizeof(struct sockaddr_in6),
341 .dom_protohdrlen = sizeof(struct sockaddr_in6),
342 };
343
344 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
345 void
in6_dinit(struct domain * dp)346 in6_dinit(struct domain *dp)
347 {
348 struct ip6protosw *pr;
349 int i;
350
351 VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
352 VERIFY(inet6domain == NULL);
353
354 inet6domain = dp;
355
356 _CASSERT(sizeof(struct protosw) == sizeof(struct ip6protosw));
357 _CASSERT(offsetof(struct ip6protosw, pr_entry) ==
358 offsetof(struct protosw, pr_entry));
359 _CASSERT(offsetof(struct ip6protosw, pr_domain) ==
360 offsetof(struct protosw, pr_domain));
361 _CASSERT(offsetof(struct ip6protosw, pr_protosw) ==
362 offsetof(struct protosw, pr_protosw));
363 _CASSERT(offsetof(struct ip6protosw, pr_type) ==
364 offsetof(struct protosw, pr_type));
365 _CASSERT(offsetof(struct ip6protosw, pr_protocol) ==
366 offsetof(struct protosw, pr_protocol));
367 _CASSERT(offsetof(struct ip6protosw, pr_flags) ==
368 offsetof(struct protosw, pr_flags));
369 _CASSERT(offsetof(struct ip6protosw, pr_input) ==
370 offsetof(struct protosw, pr_input));
371 _CASSERT(offsetof(struct ip6protosw, pr_output) ==
372 offsetof(struct protosw, pr_output));
373 _CASSERT(offsetof(struct ip6protosw, pr_ctlinput) ==
374 offsetof(struct protosw, pr_ctlinput));
375 _CASSERT(offsetof(struct ip6protosw, pr_ctloutput) ==
376 offsetof(struct protosw, pr_ctloutput));
377 _CASSERT(offsetof(struct ip6protosw, pr_usrreqs) ==
378 offsetof(struct protosw, pr_usrreqs));
379 _CASSERT(offsetof(struct ip6protosw, pr_init) ==
380 offsetof(struct protosw, pr_init));
381 _CASSERT(offsetof(struct ip6protosw, pr_drain) ==
382 offsetof(struct protosw, pr_drain));
383 _CASSERT(offsetof(struct ip6protosw, pr_sysctl) ==
384 offsetof(struct protosw, pr_sysctl));
385 _CASSERT(offsetof(struct ip6protosw, pr_lock) ==
386 offsetof(struct protosw, pr_lock));
387 _CASSERT(offsetof(struct ip6protosw, pr_unlock) ==
388 offsetof(struct protosw, pr_unlock));
389 _CASSERT(offsetof(struct ip6protosw, pr_getlock) ==
390 offsetof(struct protosw, pr_getlock));
391 _CASSERT(offsetof(struct ip6protosw, pr_filter_head) ==
392 offsetof(struct protosw, pr_filter_head));
393 _CASSERT(offsetof(struct ip6protosw, pr_old) ==
394 offsetof(struct protosw, pr_old));
395 _CASSERT(offsetof(struct ip6protosw, pr_update_last_owner) ==
396 offsetof(struct protosw, pr_update_last_owner));
397 _CASSERT(offsetof(struct ip6protosw, pr_copy_last_owner) ==
398 offsetof(struct protosw, pr_copy_last_owner));
399
400 /*
401 * Attach first, then initialize. ip6_init() needs raw IP6 handler.
402 */
403 for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
404 net_add_proto((struct protosw *)pr, dp, 0);
405 }
406 for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
407 net_init_proto((struct protosw *)pr, dp);
408 }
409
410 inet6_domain_mutex = dp->dom_mtx;
411 }
412
413 static int
rip6_pr_output(struct mbuf * m,struct socket * so,struct sockaddr_in6 * sin6,struct mbuf * m1)414 rip6_pr_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *sin6,
415 struct mbuf *m1)
416 {
417 #pragma unused(m, so, sin6, m1)
418 panic("%s", __func__);
419 /* NOTREACHED */
420 return 0;
421 }
422
423 /*
424 * Internet configuration info
425 */
426 #ifndef IPV6FORWARDING
427 #if GATEWAY6
428 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
429 #else
430 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
431 #endif /* GATEWAY6 */
432 #endif /* !IPV6FORWARDING */
433
434 #ifndef IPV6_SENDREDIRECTS
435 #define IPV6_SENDREDIRECTS 1
436 #endif
437
438 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
439 int ip6_sendredirects = IPV6_SENDREDIRECTS;
440 int ip6_defhlim = IPV6_DEFHLIM;
441 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
442 int ip6_accept_rtadv = 1; /* deprecated */
443 int ip6_log_interval = 5;
444 int ip6_hdrnestlimit = 15; /* How many header options will we process? */
445 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
446 int ip6_auto_flowlabel = 1;
447 int ip6_gif_hlim = 0;
448 int ip6_use_deprecated = 1; /* allow deprecated addr [RFC 4862, 5.5.4] */
449 int ip6_rr_prune = 5; /* router renumbering prefix
450 * walk list every 5 sec. */
451 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
452 int ip6_v6only = 0; /* Mapped addresses off by default - Radar 3347718 -- REVISITING FOR 10.7 -- TESTING WITH MAPPED@ OFF */
453
454 int ip6_neighborgcthresh = 1024; /* Threshold # of NDP entries for GC */
455 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */
456 int ip6_maxifdefrouters = 64; /* Max acceptable default or RTI routers via RA */
457 int ip6_maxdynroutes = 1024; /* Max # of routes created via redirect */
458 int ip6_only_allow_rfc4193_prefix = 0; /* Only allow RFC4193 style Unique Local IPv6 Unicast prefixes */
459
460 static int ip6_keepfaith = 0;
461 uint64_t ip6_log_time = 0;
462 int nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
463
464 /* icmp6 */
465 /*
466 * BSDI4 defines these variables in in_proto.c...
467 * XXX: what if we don't define INET? Should we define pmtu6_expire
468 * or so? ([email protected] 19990310)
469 */
470 int pmtu_expire = 60 * 10;
471 int pmtu_probe = 60 * 2;
472
473 /* raw IP6 parameters */
474 /*
475 * Nominal space allocated to a raw ip socket.
476 */
477 #define RIPV6SNDQ 8192
478 #define RIPV6RCVQ 8192
479
480 u_int32_t rip6_sendspace = RIPV6SNDQ;
481 u_int32_t rip6_recvspace = RIPV6RCVQ;
482
483 /* ICMPV6 parameters */
484 int icmp6_rediraccept = 1; /* accept and process redirects */
485 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
486 uint32_t icmp6errppslim = 500; /* 500 packets per second */
487 uint32_t icmp6errppslim_random_incr = 500; /* We further randomize icmp6errppslim
488 * with this during icmpv6 initialization*/
489 int icmp6rappslim = 10; /* 10 packets per second */
490 int icmp6_nodeinfo = 0; /* enable/disable NI response */
491
492 /* UDP on IP6 parameters */
493 int udp6_sendspace = 9216; /* really max datagram size */
494 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
495 /* 40 1K datagrams */
496
497 /*
498 * sysctl related items.
499 */
500 SYSCTL_NODE(_net, PF_INET6, inet6,
501 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet6 Family");
502
503 /* net.inet6 */
504 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6,
505 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IP6");
506 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,
507 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "ICMP6");
508 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6,
509 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "UDP6");
510 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6,
511 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "TCP6");
512 #if IPSEC
513 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6,
514 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IPSEC6");
515 #endif /* IPSEC */
516
517 /* net.inet6.ip6 */
518 static int
519 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
520 {
521 #pragma unused(oidp, arg2)
522 int error = 0;
523 int value = 0;
524
525 error = SYSCTL_OUT(req, arg1, sizeof(int));
526 if (error || !req->newptr) {
527 return error;
528 }
529
530 error = SYSCTL_IN(req, &value, sizeof(value));
531 if (error) {
532 return error;
533 }
534
535 if (value > ND6_MAX_LIFETIME ||
536 value < ip6_desync_factor + ip6_temp_regen_advance) {
537 return EINVAL;
538 }
539
540 ip6_temp_preferred_lifetime = value;
541 return error;
542 }
543
544 static int
545 sysctl_ip6_tempvltime SYSCTL_HANDLER_ARGS
546 {
547 #pragma unused(oidp, arg2)
548 int error = 0;
549 int value = 0;
550
551 error = SYSCTL_OUT(req, arg1, sizeof(int));
552 if (error || !req->newptr) {
553 return error;
554 }
555
556 error = SYSCTL_IN(req, &value, sizeof(value));
557 if (error) {
558 return error;
559 }
560
561 if (value > ND6_MAX_LIFETIME ||
562 value < ip6_temp_preferred_lifetime) {
563 return EINVAL;
564 }
565
566 ip6_temp_valid_lifetime = value;
567 return error;
568 }
569
570 static int
571 sysctl_ip6_cga_conflict_retries SYSCTL_HANDLER_ARGS
572 {
573 #pragma unused(oidp, arg2)
574 int error = 0;
575 int value = 0;
576
577 error = SYSCTL_OUT(req, arg1, sizeof(int));
578 if (error || !req->newptr) {
579 return error;
580 }
581
582 error = SYSCTL_IN(req, &value, sizeof(value));
583 if (error) {
584 return error;
585 }
586 if (value > IPV6_CGA_CONFLICT_RETRIES_MAX || value < 0) {
587 return EINVAL;
588 }
589
590 ip6_cga_conflict_retries = value;
591 return 0;
592 }
593
594 static int
595 ip6_getstat SYSCTL_HANDLER_ARGS
596 {
597 #pragma unused(oidp, arg1, arg2)
598 if (req->oldptr == USER_ADDR_NULL) {
599 req->oldlen = (size_t)sizeof(struct ip6stat);
600 }
601
602 return SYSCTL_OUT(req, &ip6stat, MIN(sizeof(ip6stat), req->oldlen));
603 }
604
605 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
606 forwarding, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_forwarding, 0, "");
607 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
608 redirect, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_sendredirects, 0, "");
609 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
610 hlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defhlim, 0, "");
611 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_STATS, stats,
612 CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
613 0, 0, ip6_getstat, "S,ip6stat", "");
614
615 #if (DEVELOPMENT || DEBUG)
616 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
617 accept_rtadv, CTLFLAG_RW | CTLFLAG_LOCKED,
618 &ip6_accept_rtadv, 0, "");
619 #else
620 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
621 accept_rtadv, CTLFLAG_RD | CTLFLAG_LOCKED,
622 &ip6_accept_rtadv, 0, "");
623 #endif /* (DEVELOPMENT || DEBUG) */
624 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
625 keepfaith, CTLFLAG_RD | CTLFLAG_LOCKED, &ip6_keepfaith, 0, "");
626 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
627 log_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_log_interval, 0, "");
628 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
629 hdrnestlimit, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_hdrnestlimit, 0, "");
630 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
631 dad_count, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_dad_count, 0, "");
632 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
633 auto_flowlabel, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_flowlabel, 0, "");
634 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
635 defmcasthlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defmcasthlim, 0, "");
636 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
637 gifhlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_gif_hlim, 0, "");
638 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
639 kame_version, CTLFLAG_RD | CTLFLAG_LOCKED, (void *)((uintptr_t)(__KAME_VERSION)), 0, "");
640 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
641 use_deprecated, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_deprecated, 0, "");
642 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
643 rr_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_rr_prune, 0, "");
644 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
645 use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_tempaddr, 0, "");
646 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ULA_USETEMPADDR,
647 ula_use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_ula_use_tempaddr, 0, "");
648 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
649 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_preferred_lifetime, 0,
650 sysctl_ip6_temppltime, "I", "");
651 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
652 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_valid_lifetime, 0,
653 sysctl_ip6_tempvltime, "I", "");
654 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
655 v6only, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_v6only, 0, "");
656 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
657 auto_linklocal, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_linklocal, 0, "");
658 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD | CTLFLAG_LOCKED,
659 &rip6stat, rip6stat, "");
660 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
661 prefer_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_prefer_tempaddr, 0, "");
662 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
663 use_defaultzone, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_defzone, 0, "");
664 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
665 mcast_pmtu, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_mcast_pmtu, 0, "");
666 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NEIGHBORGCTHRESH,
667 neighborgcthresh, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_neighborgcthresh, 0, "");
668 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFPREFIXES,
669 maxifprefixes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifprefixes, 0, "");
670 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFDEFROUTERS,
671 maxifdefrouters, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifdefrouters, 0, "");
672 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXDYNROUTES,
673 maxdynroutes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxdynroutes, 0, "");
674 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
675 only_allow_rfc4193_prefixes, CTLFLAG_RW | CTLFLAG_LOCKED,
676 &ip6_only_allow_rfc4193_prefix, 0, "");
677 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
678 clat_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &clat_debug, 0, "");
679
680 SYSCTL_PROC(_net_inet6_ip6, OID_AUTO,
681 cga_conflict_retries, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
682 &ip6_cga_conflict_retries, 0, sysctl_ip6_cga_conflict_retries, "IU", "");
683
684 /*
685 * One single sysctl to set v6 stack profile for IPv6 compliance testing.
686 * A lot of compliance test suites are not aware of other enhancements in IPv6
687 * protocol and expect some arguably obsolete behavior.
688 */
689 int v6_compliance_profile = 0;
690 static int
691 sysctl_set_v6_compliance_profile SYSCTL_HANDLER_ARGS
692 {
693 #pragma unused(oidp, arg2)
694 int changed, error;
695 int value = *(int *) arg1;
696
697 error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
698 if (error || !changed) {
699 return error;
700 }
701
702 if (value != 0 && value != 1) {
703 return ERANGE;
704 }
705
706 if (value == 1) {
707 ip6_use_tempaddr = 0;
708 dad_enhanced = 0;
709 icmp6_rediraccept = 1;
710 nd6_optimistic_dad = 0;
711 nd6_process_rti = ND6_PROCESS_RTI_ENABLE;
712 } else {
713 ip6_use_tempaddr = IP6_USE_TMPADDR_DEFAULT;
714 dad_enhanced = ND6_DAD_ENHANCED_DEFAULT;
715 icmp6_rediraccept = ICMP6_REDIRACCEPT_DEFAULT;
716 nd6_optimistic_dad = ND6_OPTIMISTIC_DAD_DEFAULT;
717 nd6_process_rti = ND6_PROCESS_RTI_DEFAULT;
718 }
719
720 v6_compliance_profile = value;
721 return 0;
722 }
723
724 SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, compliance_profile,
725 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
726 &v6_compliance_profile, 0, sysctl_set_v6_compliance_profile,
727 "I", "set IPv6 compliance profile");
728
729 /* net.inet6.icmp6 */
730 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
731 rediraccept, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_rediraccept, 0, "");
732 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
733 redirtimeout, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_redirtimeout, 0, "");
734 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
735 &icmp6stat, icmp6stat, "");
736 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
737 nd6_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune, 0, "");
738 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
739 nd6_prune_lazy, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune_lazy, 0, "");
740 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
741 nd6_delay, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_delay, 0, "");
742 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
743 nd6_umaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_umaxtries, 0, "");
744 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
745 nd6_mmaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_mmaxtries, 0, "");
746 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
747 nd6_useloopback, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_useloopback, 0, "");
748 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ACCEPT_6TO4,
749 nd6_accept_6to4, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_accept_6to4, 0, "");
750 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
751 nodeinfo, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_nodeinfo, 0, "");
752 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
753 errppslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim, 0, "");
754 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT_RANDOM_INCR,
755 errppslimit_random_incr, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim_random_incr, 0, "");
756 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
757 rappslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6rappslim, 0, "");
758 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
759 nd6_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_debug, 0, "");
760 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
761 nd6_onlink_ns_rfc4861, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_onlink_ns_rfc4861, 0,
762 "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
763 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_OPTIMISTIC_DAD,
764 nd6_optimistic_dad, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_optimistic_dad, 0, "");
765