1 /*
2 * Copyright (c) 2008-2024 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/kauth.h>
99 #include <sys/kernel.h>
100 #include <sys/domain.h>
101 #include <sys/mbuf.h>
102 #include <sys/systm.h>
103 #include <sys/sysctl.h>
104
105 #include <net/if.h>
106 #include <net/radix.h>
107 #include <net/route.h>
108 #include <net/nat464_utils.h>
109
110 #include <netinet/in.h>
111 #include <netinet/in_systm.h>
112 #include <netinet/in_var.h>
113 #include <netinet/ip_encap.h>
114 #include <netinet/ip.h>
115 #include <netinet/ip_var.h>
116 #include <netinet/ip6.h>
117 #include <netinet6/ip6_var.h>
118 #include <netinet6/in6_var.h>
119 #include <netinet/icmp6.h>
120
121 #include <netinet/tcp.h>
122 #include <netinet/tcp_timer.h>
123 #include <netinet/tcp_var.h>
124 #include <netinet/udp.h>
125 #include <netinet/udp_var.h>
126 #include <netinet6/tcp6_var.h>
127 #include <netinet6/raw_ip6.h>
128 #include <netinet6/udp6_var.h>
129 #include <netinet6/nd6.h>
130 #include <netinet6/mld6_var.h>
131
132 #if IPSEC
133 #include <netinet6/ipsec.h>
134 #include <netinet6/ipsec6.h>
135 #include <netinet6/ah.h>
136 #include <netinet6/ah6.h>
137 #if IPSEC_ESP
138 #include <netinet6/esp.h>
139 #include <netinet6/esp6.h>
140 #endif
141 #endif /*IPSEC*/
142
143 #include <netinet6/ip6protosw.h>
144
145 #include <net/net_osdep.h>
146 #include <os/log.h>
147
148 #include <IOKit/IOBSD.h>
149
150 /*
151 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
152 */
153
154 extern struct domain inet6domain_s;
155 struct domain *inet6domain = NULL;
156
157 static struct pr_usrreqs nousrreqs;
158 lck_mtx_t *inet6_domain_mutex;
159
160 static void in6_dinit(struct domain *);
161 static int rip6_pr_output(struct mbuf *, struct socket *,
162 struct sockaddr_in6 *, struct mbuf *);
163
164 struct ip6protosw inet6sw[] = {
165 {
166 .pr_type = 0,
167 .pr_protocol = IPPROTO_IPV6,
168 .pr_init = ip6_init,
169 .pr_drain = ip6_drain,
170 .pr_usrreqs = &nousrreqs,
171 },
172 {
173 .pr_type = SOCK_DGRAM,
174 .pr_protocol = IPPROTO_UDP,
175 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK | PR_PCBLOCK |
176 PR_EVCONNINFO | PR_PRECONN_WRITE,
177 .pr_input = udp6_input,
178 .pr_ctlinput = udp6_ctlinput,
179 .pr_ctloutput = udp_ctloutput,
180 #if !INET /* don't call initialization twice */
181 .pr_init = udp_init,
182 #endif /* !INET */
183 .pr_usrreqs = &udp6_usrreqs,
184 .pr_lock = udp_lock,
185 .pr_unlock = udp_unlock,
186 .pr_getlock = udp_getlock,
187 .pr_update_last_owner = inp_update_last_owner,
188 .pr_copy_last_owner = inp_copy_last_owner,
189 },
190 {
191 .pr_type = SOCK_STREAM,
192 .pr_protocol = IPPROTO_TCP,
193 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_PCBLOCK |
194 PR_PROTOLOCK | PR_DISPOSE | PR_EVCONNINFO |
195 PR_PRECONN_WRITE | PR_DATA_IDEMPOTENT,
196 .pr_input = tcp6_input,
197 .pr_ctlinput = tcp6_ctlinput,
198 .pr_ctloutput = tcp_ctloutput,
199 #if !INET /* don't call initialization and timeout routines twice */
200 .pr_init = tcp_init,
201 #endif /* !INET */
202 .pr_drain = tcp_drain,
203 .pr_usrreqs = &tcp6_usrreqs,
204 .pr_lock = tcp_lock,
205 .pr_unlock = tcp_unlock,
206 .pr_getlock = tcp_getlock,
207 .pr_update_last_owner = inp_update_last_owner,
208 .pr_copy_last_owner = inp_copy_last_owner,
209 },
210 {
211 .pr_type = SOCK_RAW,
212 .pr_protocol = IPPROTO_RAW,
213 .pr_flags = PR_ATOMIC | PR_ADDR,
214 .pr_input = rip6_input,
215 .pr_output = rip6_pr_output,
216 .pr_ctlinput = rip6_ctlinput,
217 .pr_ctloutput = rip6_ctloutput,
218 #if !INET /* don't call initialization and timeout routines twice */
219 .pr_init = rip_init,
220 #endif /* !INET */
221 .pr_usrreqs = &rip6_usrreqs,
222 .pr_unlock = rip_unlock,
223 .pr_update_last_owner = inp_update_last_owner,
224 .pr_copy_last_owner = inp_copy_last_owner,
225 },
226 {
227 .pr_type = SOCK_RAW,
228 .pr_protocol = IPPROTO_ICMPV6,
229 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
230 .pr_input = icmp6_input,
231 .pr_output = rip6_pr_output,
232 .pr_ctlinput = rip6_ctlinput,
233 .pr_ctloutput = rip6_ctloutput,
234 .pr_init = icmp6_init,
235 .pr_usrreqs = &rip6_usrreqs,
236 .pr_unlock = rip_unlock,
237 .pr_update_last_owner = inp_update_last_owner,
238 .pr_copy_last_owner = inp_copy_last_owner,
239 },
240 {
241 .pr_type = SOCK_DGRAM,
242 .pr_protocol = IPPROTO_ICMPV6,
243 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
244 .pr_input = icmp6_input,
245 .pr_output = rip6_pr_output,
246 .pr_ctlinput = rip6_ctlinput,
247 .pr_ctloutput = icmp6_dgram_ctloutput,
248 .pr_init = icmp6_init,
249 .pr_usrreqs = &icmp6_dgram_usrreqs,
250 .pr_unlock = rip_unlock,
251 .pr_update_last_owner = inp_update_last_owner,
252 .pr_copy_last_owner = inp_copy_last_owner,
253 },
254 {
255 .pr_type = SOCK_RAW,
256 .pr_protocol = IPPROTO_DSTOPTS,
257 .pr_flags = PR_ATOMIC | PR_ADDR,
258 .pr_input = dest6_input,
259 .pr_usrreqs = &nousrreqs,
260 },
261 {
262 .pr_type = SOCK_RAW,
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_protocol = IPPROTO_FRAGMENT,
271 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
272 .pr_input = frag6_input,
273 .pr_usrreqs = &nousrreqs,
274 },
275 #if IPSEC
276 {
277 .pr_type = SOCK_RAW,
278 .pr_protocol = IPPROTO_AH,
279 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
280 .pr_input = ah6_input,
281 .pr_usrreqs = &nousrreqs,
282 },
283 #if IPSEC_ESP
284 {
285 .pr_type = SOCK_RAW,
286 .pr_protocol = IPPROTO_ESP,
287 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
288 .pr_input = esp6_input,
289 .pr_ctlinput = esp6_ctlinput,
290 .pr_usrreqs = &nousrreqs,
291 },
292 #endif /* IPSEC_ESP */
293 #endif /* IPSEC */
294 #if INET
295 {
296 .pr_type = SOCK_RAW,
297 .pr_protocol = IPPROTO_IPV4,
298 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
299 .pr_input = encap6_input,
300 .pr_output = rip6_pr_output,
301 .pr_ctloutput = rip6_ctloutput,
302 .pr_usrreqs = &rip6_usrreqs,
303 .pr_unlock = rip_unlock,
304 .pr_update_last_owner = inp_update_last_owner,
305 .pr_copy_last_owner = inp_copy_last_owner,
306 },
307 #endif /*INET*/
308 {
309 .pr_type = SOCK_RAW,
310 .pr_protocol = IPPROTO_IPV6,
311 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
312 .pr_input = encap6_input,
313 .pr_output = rip6_pr_output,
314 .pr_ctloutput = rip6_ctloutput,
315 .pr_usrreqs = &rip6_usrreqs,
316 .pr_unlock = rip_unlock,
317 .pr_update_last_owner = inp_update_last_owner,
318 .pr_copy_last_owner = inp_copy_last_owner,
319 },
320 /* raw wildcard */
321 {
322 .pr_type = SOCK_RAW,
323 .pr_protocol = 0,
324 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
325 .pr_input = rip6_input,
326 .pr_output = rip6_pr_output,
327 .pr_ctloutput = rip6_ctloutput,
328 .pr_usrreqs = &rip6_usrreqs,
329 .pr_unlock = rip_unlock,
330 .pr_update_last_owner = inp_update_last_owner,
331 .pr_copy_last_owner = inp_copy_last_owner,
332 },
333 };
334
335 int in6_proto_count = (sizeof(inet6sw) / sizeof(struct ip6protosw));
336
337 struct domain inet6domain_s = {
338 .dom_family = PF_INET6,
339 .dom_flags = DOM_REENTRANT,
340 .dom_name = "internet6",
341 .dom_init = in6_dinit,
342 .dom_rtattach = in6_inithead,
343 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3,
344 .dom_maxrtkey = sizeof(struct sockaddr_in6),
345 .dom_protohdrlen = sizeof(struct sockaddr_in6),
346 };
347
348 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
349 void
in6_dinit(struct domain * dp)350 in6_dinit(struct domain *dp)
351 {
352 struct ip6protosw *pr;
353 int i;
354
355 VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
356 VERIFY(inet6domain == NULL);
357
358 inet6domain = dp;
359
360 _CASSERT(sizeof(struct protosw) == sizeof(struct ip6protosw));
361 _CASSERT(offsetof(struct ip6protosw, pr_entry) ==
362 offsetof(struct protosw, pr_entry));
363 _CASSERT(offsetof(struct ip6protosw, pr_domain) ==
364 offsetof(struct protosw, pr_domain));
365 _CASSERT(offsetof(struct ip6protosw, pr_protosw) ==
366 offsetof(struct protosw, pr_protosw));
367 _CASSERT(offsetof(struct ip6protosw, pr_type) ==
368 offsetof(struct protosw, pr_type));
369 _CASSERT(offsetof(struct ip6protosw, pr_protocol) ==
370 offsetof(struct protosw, pr_protocol));
371 _CASSERT(offsetof(struct ip6protosw, pr_flags) ==
372 offsetof(struct protosw, pr_flags));
373 _CASSERT(offsetof(struct ip6protosw, pr_input) ==
374 offsetof(struct protosw, pr_input));
375 _CASSERT(offsetof(struct ip6protosw, pr_output) ==
376 offsetof(struct protosw, pr_output));
377 _CASSERT(offsetof(struct ip6protosw, pr_ctlinput) ==
378 offsetof(struct protosw, pr_ctlinput));
379 _CASSERT(offsetof(struct ip6protosw, pr_ctloutput) ==
380 offsetof(struct protosw, pr_ctloutput));
381 _CASSERT(offsetof(struct ip6protosw, pr_usrreqs) ==
382 offsetof(struct protosw, pr_usrreqs));
383 _CASSERT(offsetof(struct ip6protosw, pr_init) ==
384 offsetof(struct protosw, pr_init));
385 _CASSERT(offsetof(struct ip6protosw, pr_drain) ==
386 offsetof(struct protosw, pr_drain));
387 _CASSERT(offsetof(struct ip6protosw, pr_sysctl) ==
388 offsetof(struct protosw, pr_sysctl));
389 _CASSERT(offsetof(struct ip6protosw, pr_lock) ==
390 offsetof(struct protosw, pr_lock));
391 _CASSERT(offsetof(struct ip6protosw, pr_unlock) ==
392 offsetof(struct protosw, pr_unlock));
393 _CASSERT(offsetof(struct ip6protosw, pr_getlock) ==
394 offsetof(struct protosw, pr_getlock));
395 _CASSERT(offsetof(struct ip6protosw, pr_filter_head) ==
396 offsetof(struct protosw, pr_filter_head));
397 _CASSERT(offsetof(struct ip6protosw, pr_old) ==
398 offsetof(struct protosw, pr_old));
399 _CASSERT(offsetof(struct ip6protosw, pr_update_last_owner) ==
400 offsetof(struct protosw, pr_update_last_owner));
401 _CASSERT(offsetof(struct ip6protosw, pr_copy_last_owner) ==
402 offsetof(struct protosw, pr_copy_last_owner));
403
404 /*
405 * Attach first, then initialize. ip6_init() needs raw IP6 handler.
406 */
407 for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
408 net_add_proto((struct protosw *)pr, dp, 0);
409 }
410 for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
411 net_init_proto((struct protosw *)pr, dp);
412 }
413
414 inet6_domain_mutex = dp->dom_mtx;
415 }
416
417 static int
rip6_pr_output(struct mbuf * m,struct socket * so,struct sockaddr_in6 * sin6,struct mbuf * m1)418 rip6_pr_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *sin6,
419 struct mbuf *m1)
420 {
421 #pragma unused(m, so, sin6, m1)
422 panic("%s", __func__);
423 /* NOTREACHED */
424 return 0;
425 }
426
427 /*
428 * Internet configuration info
429 */
430 #ifndef IPV6FORWARDING
431 #if GATEWAY6
432 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
433 #else
434 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
435 #endif /* GATEWAY6 */
436 #endif /* !IPV6FORWARDING */
437
438 #ifndef IPV6_SENDREDIRECTS
439 #define IPV6_SENDREDIRECTS 1
440 #endif
441
442 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
443 int ip6_sendredirects = IPV6_SENDREDIRECTS;
444 int ip6_defhlim = IPV6_DEFHLIM;
445 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
446 int ip6_accept_rtadv = 1; /* deprecated */
447 int ip6_log_interval = 5;
448 int ip6_hdrnestlimit = 15; /* How many header options will we process? */
449 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
450 int ip6_auto_flowlabel = 1;
451 int ip6_gif_hlim = 0;
452 int ip6_use_deprecated = 1; /* allow deprecated addr [RFC 4862, 5.5.4] */
453 int ip6_rr_prune = 5; /* router renumbering prefix
454 * walk list every 5 sec. */
455 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
456 int ip6_v6only = 0; /* Mapped addresses off by default - Radar 3347718 -- REVISITING FOR 10.7 -- TESTING WITH MAPPED@ OFF */
457
458 int ip6_neighborgcthresh = 1024; /* Threshold # of NDP entries for GC */
459 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */
460 int ip6_maxifdefrouters = 64; /* Max acceptable default or RTI routers via RA */
461 int ip6_maxdynroutes = 1024; /* Max # of routes created via redirect */
462 int ip6_only_allow_rfc4193_prefix = 0; /* Only allow RFC4193 style Unique Local IPv6 Unicast prefixes */
463
464 static int ip6_keepfaith = 0;
465 uint64_t ip6_log_time = 0;
466 int nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
467
468 /* icmp6 */
469 /*
470 * BSDI4 defines these variables in in_proto.c...
471 * XXX: what if we don't define INET? Should we define pmtu6_expire
472 * or so? ([email protected] 19990310)
473 */
474 int pmtu_expire = 60 * 10;
475 int pmtu_probe = 60 * 2;
476
477 /* raw IP6 parameters */
478 /*
479 * Nominal space allocated to a raw ip socket.
480 */
481 #define RIPV6SNDQ 8192
482 #define RIPV6RCVQ 8192
483
484 u_int32_t rip6_sendspace = RIPV6SNDQ;
485 u_int32_t rip6_recvspace = RIPV6RCVQ;
486
487 /* ICMPV6 parameters */
488 int icmp6_rediraccept = 1; /* accept and process redirects */
489 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
490 uint32_t icmp6errppslim = 500; /* 500 packets per second */
491 uint32_t icmp6errppslim_random_incr = 500; /* We further randomize icmp6errppslim
492 * with this during icmpv6 initialization*/
493 int icmp6rappslim = 10; /* 10 packets per second */
494 int icmp6_nodeinfo = 0; /* enable/disable NI response */
495
496 /* UDP on IP6 parameters */
497 int udp6_sendspace = 9216; /* really max datagram size */
498 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
499 /* 40 1K datagrams */
500
501 /*
502 * sysctl related items.
503 */
504 SYSCTL_NODE(_net, PF_INET6, inet6,
505 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet6 Family");
506
507 /* net.inet6 */
508 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6,
509 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IP6");
510 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,
511 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "ICMP6");
512 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6,
513 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "UDP6");
514 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6,
515 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "TCP6");
516 #if IPSEC
517 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6,
518 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IPSEC6");
519 #endif /* IPSEC */
520
521 /* net.inet6.ip6 */
522 static int
523 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
524 {
525 #pragma unused(oidp, arg2)
526 int error = 0;
527 int value = 0;
528
529 error = SYSCTL_OUT(req, arg1, sizeof(int));
530 if (error || !req->newptr) {
531 return error;
532 }
533
534 error = SYSCTL_IN(req, &value, sizeof(value));
535 if (error) {
536 return error;
537 }
538
539 if (value > ND6_MAX_LIFETIME ||
540 value < ip6_desync_factor + ip6_temp_regen_advance) {
541 return EINVAL;
542 }
543
544 ip6_temp_preferred_lifetime = value;
545 return error;
546 }
547
548 static int
549 sysctl_ip6_tempvltime SYSCTL_HANDLER_ARGS
550 {
551 #pragma unused(oidp, arg2)
552 int error = 0;
553 uint32_t value = 0;
554
555 error = SYSCTL_OUT(req, arg1, sizeof(uint32_t));
556 if (error || !req->newptr) {
557 return error;
558 }
559
560 error = SYSCTL_IN(req, &value, sizeof(value));
561 if (error) {
562 return error;
563 }
564
565 if (value > ND6_MAX_LIFETIME ||
566 value < ip6_temp_preferred_lifetime) {
567 return EINVAL;
568 }
569
570 ip6_temp_valid_lifetime = value;
571 return error;
572 }
573
574 static int
575 sysctl_ip6_cga_conflict_retries SYSCTL_HANDLER_ARGS
576 {
577 #pragma unused(oidp, arg2)
578 int error = 0;
579 int value = 0;
580
581 error = SYSCTL_OUT(req, arg1, sizeof(int));
582 if (error || !req->newptr) {
583 return error;
584 }
585
586 error = SYSCTL_IN(req, &value, sizeof(value));
587 if (error) {
588 return error;
589 }
590 if (value > IPV6_CGA_CONFLICT_RETRIES_MAX || value < 0) {
591 return EINVAL;
592 }
593
594 ip6_cga_conflict_retries = value;
595 return 0;
596 }
597
598 static int
599 ip6_getstat SYSCTL_HANDLER_ARGS
600 {
601 #pragma unused(oidp, arg1, arg2)
602 if (req->oldptr == USER_ADDR_NULL) {
603 req->oldlen = (size_t)sizeof(struct ip6stat);
604 }
605
606 return SYSCTL_OUT(req, &ip6stat, MIN(sizeof(ip6stat), req->oldlen));
607 }
608
609 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
610 redirect, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_sendredirects, 0, "");
611 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
612 hlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defhlim, 0, "");
613 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_STATS, stats,
614 CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
615 0, 0, ip6_getstat, "S,ip6stat", "");
616
617 #if (DEVELOPMENT || DEBUG)
618 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
619 accept_rtadv, CTLFLAG_RW | CTLFLAG_LOCKED,
620 &ip6_accept_rtadv, 0, "");
621 #else
622 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
623 accept_rtadv, CTLFLAG_RD | CTLFLAG_LOCKED,
624 &ip6_accept_rtadv, 0, "");
625 #endif /* (DEVELOPMENT || DEBUG) */
626 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
627 keepfaith, CTLFLAG_RD | CTLFLAG_LOCKED, &ip6_keepfaith, 0, "");
628 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
629 log_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_log_interval, 0, "");
630 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
631 hdrnestlimit, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_hdrnestlimit, 0, "");
632 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
633 dad_count, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_dad_count, 0, "");
634 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
635 auto_flowlabel, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_flowlabel, 0, "");
636 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
637 defmcasthlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defmcasthlim, 0, "");
638 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
639 gifhlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_gif_hlim, 0, "");
640 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
641 kame_version, CTLFLAG_RD | CTLFLAG_LOCKED, __unsafe_forge_single(void *, __KAME_VERSION), 0, "");
642 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
643 use_deprecated, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_deprecated, 0, "");
644 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
645 rr_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_rr_prune, 0, "");
646 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
647 use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_tempaddr, 0, "");
648 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ULA_USETEMPADDR,
649 ula_use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_ula_use_tempaddr, 0, "");
650 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
651 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_preferred_lifetime, 0,
652 sysctl_ip6_temppltime, "I", "");
653 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
654 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_valid_lifetime, 0,
655 sysctl_ip6_tempvltime, "I", "");
656 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
657 v6only, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_v6only, 0, "");
658 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
659 auto_linklocal, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_linklocal, 0, "");
660 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD | CTLFLAG_LOCKED,
661 &rip6stat, rip6stat, "");
662 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
663 prefer_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_prefer_tempaddr, 0, "");
664 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
665 use_defaultzone, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_defzone, 0, "");
666 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
667 mcast_pmtu, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_mcast_pmtu, 0, "");
668 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NEIGHBORGCTHRESH,
669 neighborgcthresh, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_neighborgcthresh, 0, "");
670 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFPREFIXES,
671 maxifprefixes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifprefixes, 0, "");
672 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFDEFROUTERS,
673 maxifdefrouters, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifdefrouters, 0, "");
674 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXDYNROUTES,
675 maxdynroutes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxdynroutes, 0, "");
676 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
677 only_allow_rfc4193_prefixes, CTLFLAG_RW | CTLFLAG_LOCKED,
678 &ip6_only_allow_rfc4193_prefix, 0, "");
679 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
680 clat_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &clat_debug, 0, "");
681
682 SYSCTL_PROC(_net_inet6_ip6, OID_AUTO,
683 cga_conflict_retries, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
684 &ip6_cga_conflict_retries, 0, sysctl_ip6_cga_conflict_retries, "IU", "");
685
686
687 static int sysctl_ip6_forwarding SYSCTL_HANDLER_ARGS;
688
689 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
690 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_forwarding, 0,
691 sysctl_ip6_forwarding, "I", "");
692
693 static int
694 sysctl_ip6_forwarding SYSCTL_HANDLER_ARGS
695 {
696 #pragma unused(arg1, arg2)
697 int error, i;
698 char proc_name_string[MAXCOMLEN + 1];
699 proc_name(proc_pid(current_proc()), proc_name_string, sizeof(proc_name_string));
700
701 i = ip6_forwarding;
702 os_log(OS_LOG_DEFAULT, "%s:%s entry: ip6_forwarding is %d",
703 proc_name_string, __func__, ip6_forwarding);
704
705 error = sysctl_handle_int(oidp, &i, 0, req);
706 if (error || req->newptr == USER_ADDR_NULL) {
707 goto done;
708 }
709 /* impose bounds */
710 if (i < 0) {
711 error = EINVAL;
712 goto done;
713 }
714
715 if (i > 0) {
716 i = 1;
717 }
718
719 ip6_forwarding = i;
720 done:
721 os_log(OS_LOG_DEFAULT, "%s:%s return: ip6_forwarding is %d "
722 "and error is %d", proc_name_string, __func__, ip6_forwarding, error);
723 return error;
724 }
725
726 static int sysctl_nd6_debug SYSCTL_HANDLER_ARGS;
727
728 SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
729 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED, &nd6_debug, 0,
730 sysctl_nd6_debug, "I", "");
731
732 static int
733 sysctl_nd6_debug SYSCTL_HANDLER_ARGS
734 {
735 #pragma unused(arg1, arg2)
736 int error;
737 int old_value = nd6_debug;
738 int value = old_value;
739 #if (DEBUG || DEVELOPMENT)
740 char proc_name_string[MAXCOMLEN + 1];
741
742 proc_name(proc_pid(current_proc()), proc_name_string, sizeof(proc_name_string));
743 #endif
744
745 error = sysctl_handle_int(oidp, &value, 0, req);
746 if (error || req->newptr == USER_ADDR_NULL) {
747 goto done;
748 }
749
750 if (!(kauth_cred_issuser(kauth_cred_get()) != 0 ||
751 IOCurrentTaskHasEntitlement("com.apple.private.networking.elevated-logging"))) {
752 #if (DEBUG || DEVELOPMENT)
753 os_log(OS_LOG_DEFAULT, "%s:%s: sysctl not allowed\n",
754 proc_name_string, __func__);
755 #endif
756 error = EPERM;
757 goto done;
758 }
759
760 /* impose bounds */
761 if (value < 0) {
762 error = EINVAL;
763 goto done;
764 }
765
766 nd6_debug = value;
767
768 done:
769 #if (DEBUG || DEVELOPMENT)
770 os_log(OS_LOG_DEFAULT, "%s:%s return: nd6_debug is %d "
771 "and error is %d\n", proc_name_string, __func__, nd6_debug, error);
772 #endif
773 return error;
774 }
775
776 /*
777 * One single sysctl to set v6 stack profile for IPv6 compliance testing.
778 * A lot of compliance test suites are not aware of other enhancements in IPv6
779 * protocol and expect some arguably obsolete behavior.
780 */
781 static int v6_compliance_profile;
782 static int
783 sysctl_set_v6_compliance_profile SYSCTL_HANDLER_ARGS
784 {
785 #pragma unused(oidp, arg2)
786 int changed, error;
787 int value = *(int *) arg1;
788
789 error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
790 if (error || !changed) {
791 return error;
792 }
793
794 if (value != 0 && value != 1) {
795 return ERANGE;
796 }
797
798 if (value == 1) {
799 ip6_use_tempaddr = 0;
800 dad_enhanced = 0;
801 icmp6_rediraccept = 1;
802 nd6_optimistic_dad = 0;
803 nd6_process_rti = ND6_PROCESS_RTI_ENABLE;
804 } else {
805 ip6_use_tempaddr = IP6_USE_TMPADDR_DEFAULT;
806 dad_enhanced = ND6_DAD_ENHANCED_DEFAULT;
807 icmp6_rediraccept = ICMP6_REDIRACCEPT_DEFAULT;
808 nd6_optimistic_dad = ND6_OPTIMISTIC_DAD_DEFAULT;
809 nd6_process_rti = ND6_PROCESS_RTI_DEFAULT;
810 }
811
812 v6_compliance_profile = value;
813 return 0;
814 }
815
816 SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, compliance_profile,
817 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
818 &v6_compliance_profile, 0, sysctl_set_v6_compliance_profile,
819 "I", "set IPv6 compliance profile");
820
821 /* net.inet6.icmp6 */
822 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
823 rediraccept, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_rediraccept, 0, "");
824 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
825 redirtimeout, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_redirtimeout, 0, "");
826 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
827 &icmp6stat, icmp6stat, "");
828 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
829 nd6_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune, 0, "");
830 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
831 nd6_prune_lazy, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune_lazy, 0, "");
832 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
833 nd6_delay, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_delay, 0, "");
834 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
835 nd6_umaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_umaxtries, 0, "");
836 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
837 nd6_mmaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_mmaxtries, 0, "");
838 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
839 nd6_useloopback, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_useloopback, 0, "");
840 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ACCEPT_6TO4,
841 nd6_accept_6to4, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_accept_6to4, 0, "");
842 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
843 nodeinfo, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_nodeinfo, 0, "");
844 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
845 errppslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim, 0, "");
846 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT_RANDOM_INCR,
847 errppslimit_random_incr, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim_random_incr, 0, "");
848 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
849 rappslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6rappslim, 0, "");
850 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
851 nd6_onlink_ns_rfc4861, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_onlink_ns_rfc4861, 0,
852 "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
853 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_OPTIMISTIC_DAD,
854 nd6_optimistic_dad, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_optimistic_dad, 0, "");
855