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 .pr_init = udp_init,
181 .pr_usrreqs = &udp6_usrreqs,
182 .pr_lock = udp_lock,
183 .pr_unlock = udp_unlock,
184 .pr_getlock = udp_getlock,
185 .pr_update_last_owner = inp_update_last_owner,
186 .pr_copy_last_owner = inp_copy_last_owner,
187 },
188 {
189 .pr_type = SOCK_STREAM,
190 .pr_protocol = IPPROTO_TCP,
191 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_PCBLOCK |
192 PR_PROTOLOCK | PR_DISPOSE | PR_EVCONNINFO |
193 PR_PRECONN_WRITE | PR_DATA_IDEMPOTENT,
194 .pr_input = tcp6_input,
195 .pr_ctlinput = tcp6_ctlinput,
196 .pr_ctloutput = tcp_ctloutput,
197 .pr_init = tcp_init,
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 .pr_init = rip_init,
215 .pr_usrreqs = &rip6_usrreqs,
216 .pr_unlock = rip_unlock,
217 .pr_update_last_owner = inp_update_last_owner,
218 .pr_copy_last_owner = inp_copy_last_owner,
219 },
220 {
221 .pr_type = SOCK_RAW,
222 .pr_protocol = IPPROTO_ICMPV6,
223 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
224 .pr_input = icmp6_input,
225 .pr_output = rip6_pr_output,
226 .pr_ctlinput = rip6_ctlinput,
227 .pr_ctloutput = rip6_ctloutput,
228 .pr_init = icmp6_init,
229 .pr_usrreqs = &rip6_usrreqs,
230 .pr_unlock = rip_unlock,
231 .pr_update_last_owner = inp_update_last_owner,
232 .pr_copy_last_owner = inp_copy_last_owner,
233 },
234 {
235 .pr_type = SOCK_DGRAM,
236 .pr_protocol = IPPROTO_ICMPV6,
237 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
238 .pr_input = icmp6_input,
239 .pr_output = rip6_pr_output,
240 .pr_ctlinput = rip6_ctlinput,
241 .pr_ctloutput = icmp6_dgram_ctloutput,
242 .pr_init = icmp6_init,
243 .pr_usrreqs = &icmp6_dgram_usrreqs,
244 .pr_unlock = rip_unlock,
245 .pr_update_last_owner = inp_update_last_owner,
246 .pr_copy_last_owner = inp_copy_last_owner,
247 },
248 {
249 .pr_type = SOCK_RAW,
250 .pr_protocol = IPPROTO_DSTOPTS,
251 .pr_flags = PR_ATOMIC | PR_ADDR,
252 .pr_input = dest6_input,
253 .pr_usrreqs = &nousrreqs,
254 },
255 {
256 .pr_type = SOCK_RAW,
257 .pr_protocol = IPPROTO_ROUTING,
258 .pr_flags = PR_ATOMIC | PR_ADDR,
259 .pr_input = route6_input,
260 .pr_usrreqs = &nousrreqs,
261 },
262 {
263 .pr_type = SOCK_RAW,
264 .pr_protocol = IPPROTO_FRAGMENT,
265 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
266 .pr_input = frag6_input,
267 .pr_usrreqs = &nousrreqs,
268 },
269 #if IPSEC
270 {
271 .pr_type = SOCK_RAW,
272 .pr_protocol = IPPROTO_AH,
273 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
274 .pr_input = ah6_input,
275 .pr_usrreqs = &nousrreqs,
276 },
277 #if IPSEC_ESP
278 {
279 .pr_type = SOCK_RAW,
280 .pr_protocol = IPPROTO_ESP,
281 .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
282 .pr_input = esp6_input,
283 .pr_ctlinput = esp6_ctlinput,
284 .pr_usrreqs = &nousrreqs,
285 },
286 #endif /* IPSEC_ESP */
287 #endif /* IPSEC */
288 #if INET
289 {
290 .pr_type = SOCK_RAW,
291 .pr_protocol = IPPROTO_IPV4,
292 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
293 .pr_input = encap6_input,
294 .pr_output = rip6_pr_output,
295 .pr_ctloutput = rip6_ctloutput,
296 .pr_usrreqs = &rip6_usrreqs,
297 .pr_unlock = rip_unlock,
298 .pr_update_last_owner = inp_update_last_owner,
299 .pr_copy_last_owner = inp_copy_last_owner,
300 },
301 #endif /*INET*/
302 {
303 .pr_type = SOCK_RAW,
304 .pr_protocol = IPPROTO_IPV6,
305 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
306 .pr_input = encap6_input,
307 .pr_output = rip6_pr_output,
308 .pr_ctloutput = rip6_ctloutput,
309 .pr_usrreqs = &rip6_usrreqs,
310 .pr_unlock = rip_unlock,
311 .pr_update_last_owner = inp_update_last_owner,
312 .pr_copy_last_owner = inp_copy_last_owner,
313 },
314 /* raw wildcard */
315 {
316 .pr_type = SOCK_RAW,
317 .pr_protocol = 0,
318 .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
319 .pr_input = rip6_input,
320 .pr_output = rip6_pr_output,
321 .pr_ctloutput = rip6_ctloutput,
322 .pr_usrreqs = &rip6_usrreqs,
323 .pr_unlock = rip_unlock,
324 .pr_update_last_owner = inp_update_last_owner,
325 .pr_copy_last_owner = inp_copy_last_owner,
326 },
327 };
328
329 int in6_proto_count = (sizeof(inet6sw) / sizeof(struct ip6protosw));
330
331 struct domain inet6domain_s = {
332 .dom_family = PF_INET6,
333 .dom_flags = DOM_REENTRANT,
334 .dom_name = "internet6",
335 .dom_init = in6_dinit,
336 .dom_rtattach = in6_inithead,
337 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3,
338 .dom_maxrtkey = sizeof(struct sockaddr_in6),
339 .dom_protohdrlen = sizeof(struct sockaddr_in6),
340 };
341
342 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
343 void
in6_dinit(struct domain * dp)344 in6_dinit(struct domain *dp)
345 {
346 struct ip6protosw *pr;
347 int i;
348
349 VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
350 VERIFY(inet6domain == NULL);
351
352 inet6domain = dp;
353
354 static_assert(sizeof(struct protosw) == sizeof(struct ip6protosw));
355 static_assert(offsetof(struct ip6protosw, pr_entry) == offsetof(struct protosw, pr_entry));
356 static_assert(offsetof(struct ip6protosw, pr_domain) == offsetof(struct protosw, pr_domain));
357 static_assert(offsetof(struct ip6protosw, pr_protosw) == offsetof(struct protosw, pr_protosw));
358 static_assert(offsetof(struct ip6protosw, pr_type) == offsetof(struct protosw, pr_type));
359 static_assert(offsetof(struct ip6protosw, pr_protocol) == offsetof(struct protosw, pr_protocol));
360 static_assert(offsetof(struct ip6protosw, pr_flags) == offsetof(struct protosw, pr_flags));
361 static_assert(offsetof(struct ip6protosw, pr_input) == offsetof(struct protosw, pr_input));
362 static_assert(offsetof(struct ip6protosw, pr_output) == offsetof(struct protosw, pr_output));
363 static_assert(offsetof(struct ip6protosw, pr_ctlinput) == offsetof(struct protosw, pr_ctlinput));
364 static_assert(offsetof(struct ip6protosw, pr_ctloutput) == offsetof(struct protosw, pr_ctloutput));
365 static_assert(offsetof(struct ip6protosw, pr_usrreqs) == offsetof(struct protosw, pr_usrreqs));
366 static_assert(offsetof(struct ip6protosw, pr_init) == offsetof(struct protosw, pr_init));
367 static_assert(offsetof(struct ip6protosw, pr_drain) == offsetof(struct protosw, pr_drain));
368 static_assert(offsetof(struct ip6protosw, pr_lock) == offsetof(struct protosw, pr_lock));
369 static_assert(offsetof(struct ip6protosw, pr_unlock) == offsetof(struct protosw, pr_unlock));
370 static_assert(offsetof(struct ip6protosw, pr_getlock) == offsetof(struct protosw, pr_getlock));
371 static_assert(offsetof(struct ip6protosw, pr_filter_head) == offsetof(struct protosw, pr_filter_head));
372 static_assert(offsetof(struct ip6protosw, pr_old) == offsetof(struct protosw, pr_old));
373 static_assert(offsetof(struct ip6protosw, pr_update_last_owner) == offsetof(struct protosw, pr_update_last_owner));
374 static_assert(offsetof(struct ip6protosw, pr_copy_last_owner) == offsetof(struct protosw, pr_copy_last_owner));
375 static_assert(offsetof(struct ip6protosw, pr_mem_acct) == offsetof(struct protosw, pr_mem_acct));
376
377 /*
378 * Attach first, then initialize. ip6_init() needs raw IP6 handler.
379 */
380 for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
381 net_add_proto((struct protosw *)pr, dp, 0);
382 }
383 for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
384 net_init_proto((struct protosw *)pr, dp);
385 }
386
387 inet6_domain_mutex = dp->dom_mtx;
388 }
389
390 static int
rip6_pr_output(struct mbuf * m,struct socket * so,struct sockaddr_in6 * sin6,struct mbuf * m1)391 rip6_pr_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *sin6,
392 struct mbuf *m1)
393 {
394 #pragma unused(m, so, sin6, m1)
395 panic("%s", __func__);
396 /* NOTREACHED */
397 return 0;
398 }
399
400 /*
401 * Internet configuration info
402 */
403 #ifndef IPV6FORWARDING
404 #if GATEWAY6
405 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */
406 #else
407 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */
408 #endif /* GATEWAY6 */
409 #endif /* !IPV6FORWARDING */
410
411 #ifndef IPV6_SENDREDIRECTS
412 #define IPV6_SENDREDIRECTS 1
413 #endif
414
415 int ip6_forwarding = IPV6FORWARDING; /* act as router? */
416 int ip6_sendredirects = IPV6_SENDREDIRECTS;
417 int ip6_defhlim = IPV6_DEFHLIM;
418 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
419 int ip6_accept_rtadv = 1; /* deprecated */
420 int ip6_log_interval = 5;
421 int ip6_hdrnestlimit = 15; /* How many header options will we process? */
422 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */
423 int ip6_auto_flowlabel = 1;
424 int ip6_gif_hlim = 0;
425 int ip6_use_deprecated = 1; /* allow deprecated addr [RFC 4862, 5.5.4] */
426 int ip6_rr_prune = 5; /* router renumbering prefix
427 * walk list every 5 sec. */
428 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */
429 int ip6_v6only = 0; /* Mapped addresses off by default - Radar 3347718 -- REVISITING FOR 10.7 -- TESTING WITH MAPPED@ OFF */
430
431 int ip6_neighborgcthresh = 1024; /* Threshold # of NDP entries for GC */
432 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */
433 int ip6_maxifdefrouters = 64; /* Max acceptable default or RTI routers via RA */
434 int ip6_maxdynroutes = 1024; /* Max # of routes created via redirect */
435 int ip6_only_allow_rfc4193_prefix = 0; /* Only allow RFC4193 style Unique Local IPv6 Unicast prefixes */
436
437 static int ip6_keepfaith = 0;
438 uint64_t ip6_log_time = 0;
439 int nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
440
441 /* icmp6 */
442 /*
443 * BSDI4 defines these variables in in_proto.c...
444 * XXX: what if we don't define INET? Should we define pmtu6_expire
445 * or so? ([email protected] 19990310)
446 */
447 int pmtu_expire = 60 * 10;
448 int pmtu_probe = 60 * 2;
449
450 /* raw IP6 parameters */
451 /*
452 * Nominal space allocated to a raw ip socket.
453 */
454 #define RIPV6SNDQ 8192
455 #define RIPV6RCVQ 8192
456
457 u_int32_t rip6_sendspace = RIPV6SNDQ;
458 u_int32_t rip6_recvspace = RIPV6RCVQ;
459
460 /* ICMPV6 parameters */
461 int icmp6_rediraccept = 1; /* accept and process redirects */
462 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */
463 uint32_t icmp6errppslim = 500; /* 500 packets per second */
464 uint32_t icmp6errppslim_random_incr = 500; /* We further randomize icmp6errppslim
465 * with this during icmpv6 initialization*/
466 int icmp6rappslim = 10; /* 10 packets per second */
467 int icmp6_nodeinfo = 0; /* enable/disable NI response */
468
469 /* UDP on IP6 parameters */
470 int udp6_sendspace = 9216; /* really max datagram size */
471 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
472 /* 40 1K datagrams */
473
474 /*
475 * sysctl related items.
476 */
477 SYSCTL_NODE(_net, PF_INET6, inet6,
478 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet6 Family");
479
480 /* net.inet6 */
481 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6,
482 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IP6");
483 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,
484 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "ICMP6");
485 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6,
486 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "UDP6");
487 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6,
488 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "TCP6");
489 #if IPSEC
490 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6,
491 CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IPSEC6");
492 #endif /* IPSEC */
493
494 /* net.inet6.ip6 */
495 static int
496 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
497 {
498 #pragma unused(oidp, arg2)
499 int error = 0;
500 int value = 0;
501
502 error = SYSCTL_OUT(req, arg1, sizeof(int));
503 if (error || !req->newptr) {
504 return error;
505 }
506
507 error = SYSCTL_IN(req, &value, sizeof(value));
508 if (error) {
509 return error;
510 }
511
512 if (value > ND6_MAX_LIFETIME ||
513 value < ip6_desync_factor + ip6_temp_regen_advance) {
514 return EINVAL;
515 }
516
517 ip6_temp_preferred_lifetime = value;
518 return error;
519 }
520
521 static int
522 sysctl_ip6_tempvltime SYSCTL_HANDLER_ARGS
523 {
524 #pragma unused(oidp, arg2)
525 int error = 0;
526 uint32_t value = 0;
527
528 error = SYSCTL_OUT(req, arg1, sizeof(uint32_t));
529 if (error || !req->newptr) {
530 return error;
531 }
532
533 error = SYSCTL_IN(req, &value, sizeof(value));
534 if (error) {
535 return error;
536 }
537
538 if (value > ND6_MAX_LIFETIME ||
539 value < ip6_temp_preferred_lifetime) {
540 return EINVAL;
541 }
542
543 ip6_temp_valid_lifetime = value;
544 return error;
545 }
546
547 static int
548 sysctl_ip6_cga_conflict_retries SYSCTL_HANDLER_ARGS
549 {
550 #pragma unused(oidp, arg2)
551 int error = 0;
552 int value = 0;
553
554 error = SYSCTL_OUT(req, arg1, sizeof(int));
555 if (error || !req->newptr) {
556 return error;
557 }
558
559 error = SYSCTL_IN(req, &value, sizeof(value));
560 if (error) {
561 return error;
562 }
563 if (value > IPV6_CGA_CONFLICT_RETRIES_MAX || value < 0) {
564 return EINVAL;
565 }
566
567 ip6_cga_conflict_retries = value;
568 return 0;
569 }
570
571 static int
572 ip6_getstat SYSCTL_HANDLER_ARGS
573 {
574 #pragma unused(oidp, arg1, arg2)
575 if (req->oldptr == USER_ADDR_NULL) {
576 req->oldlen = (size_t)sizeof(struct ip6stat);
577 }
578
579 return SYSCTL_OUT(req, &ip6stat, MIN(sizeof(ip6stat), req->oldlen));
580 }
581
582 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
583 redirect, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_sendredirects, 0, "");
584 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
585 hlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defhlim, 0, "");
586 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_STATS, stats,
587 CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
588 0, 0, ip6_getstat, "S,ip6stat", "");
589
590 #if (DEVELOPMENT || DEBUG)
591 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
592 accept_rtadv, CTLFLAG_RW | CTLFLAG_LOCKED,
593 &ip6_accept_rtadv, 0, "");
594 #else
595 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
596 accept_rtadv, CTLFLAG_RD | CTLFLAG_LOCKED,
597 &ip6_accept_rtadv, 0, "");
598 #endif /* (DEVELOPMENT || DEBUG) */
599 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
600 keepfaith, CTLFLAG_RD | CTLFLAG_LOCKED, &ip6_keepfaith, 0, "");
601 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
602 log_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_log_interval, 0, "");
603 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
604 hdrnestlimit, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_hdrnestlimit, 0, "");
605 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
606 dad_count, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_dad_count, 0, "");
607 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
608 auto_flowlabel, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_flowlabel, 0, "");
609 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
610 defmcasthlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defmcasthlim, 0, "");
611 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
612 gifhlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_gif_hlim, 0, "");
613 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
614 kame_version, CTLFLAG_RD | CTLFLAG_LOCKED, __unsafe_forge_single(void *, __KAME_VERSION), 0, "");
615 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
616 use_deprecated, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_deprecated, 0, "");
617 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
618 rr_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_rr_prune, 0, "");
619 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
620 use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_tempaddr, 0, "");
621 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ULA_USETEMPADDR,
622 ula_use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_ula_use_tempaddr, 0, "");
623 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
624 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_preferred_lifetime, 0,
625 sysctl_ip6_temppltime, "I", "");
626 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
627 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_valid_lifetime, 0,
628 sysctl_ip6_tempvltime, "I", "");
629 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
630 v6only, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_v6only, 0, "");
631 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
632 auto_linklocal, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_linklocal, 0, "");
633 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD | CTLFLAG_LOCKED,
634 &rip6stat, rip6stat, "");
635 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
636 prefer_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_prefer_tempaddr, 0, "");
637 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
638 use_defaultzone, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_defzone, 0, "");
639 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
640 mcast_pmtu, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_mcast_pmtu, 0, "");
641 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NEIGHBORGCTHRESH,
642 neighborgcthresh, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_neighborgcthresh, 0, "");
643 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFPREFIXES,
644 maxifprefixes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifprefixes, 0, "");
645 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFDEFROUTERS,
646 maxifdefrouters, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifdefrouters, 0, "");
647 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXDYNROUTES,
648 maxdynroutes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxdynroutes, 0, "");
649 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
650 only_allow_rfc4193_prefixes, CTLFLAG_RW | CTLFLAG_LOCKED,
651 &ip6_only_allow_rfc4193_prefix, 0, "");
652 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
653 clat_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &clat_debug, 0, "");
654
655 SYSCTL_PROC(_net_inet6_ip6, OID_AUTO,
656 cga_conflict_retries, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
657 &ip6_cga_conflict_retries, 0, sysctl_ip6_cga_conflict_retries, "IU", "");
658
659
660 static int sysctl_ip6_forwarding SYSCTL_HANDLER_ARGS;
661
662 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
663 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_forwarding, 0,
664 sysctl_ip6_forwarding, "I", "");
665
666 static int
667 sysctl_ip6_forwarding SYSCTL_HANDLER_ARGS
668 {
669 #pragma unused(arg1, arg2)
670 int error, i;
671 char proc_name_string[MAXCOMLEN + 1];
672 proc_name(proc_pid(current_proc()), proc_name_string, sizeof(proc_name_string));
673
674 i = ip6_forwarding;
675 os_log(OS_LOG_DEFAULT, "%s:%s entry: ip6_forwarding is %d",
676 proc_name_string, __func__, ip6_forwarding);
677
678 error = sysctl_handle_int(oidp, &i, 0, req);
679 if (error || req->newptr == USER_ADDR_NULL) {
680 goto done;
681 }
682 /* impose bounds */
683 if (i < 0) {
684 error = EINVAL;
685 goto done;
686 }
687
688 if (i > 0) {
689 i = 1;
690 }
691
692 ip6_forwarding = i;
693 done:
694 os_log(OS_LOG_DEFAULT, "%s:%s return: ip6_forwarding is %d "
695 "and error is %d", proc_name_string, __func__, ip6_forwarding, error);
696 return error;
697 }
698
699 static int sysctl_nd6_debug SYSCTL_HANDLER_ARGS;
700
701 SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
702 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED, &nd6_debug, 0,
703 sysctl_nd6_debug, "I", "");
704
705 static int
706 sysctl_nd6_debug SYSCTL_HANDLER_ARGS
707 {
708 #pragma unused(arg1, arg2)
709 int error;
710 int old_value = nd6_debug;
711 int value = old_value;
712 #if (DEBUG || DEVELOPMENT)
713 char proc_name_string[MAXCOMLEN + 1];
714
715 proc_name(proc_pid(current_proc()), proc_name_string, sizeof(proc_name_string));
716 #endif
717
718 error = sysctl_handle_int(oidp, &value, 0, req);
719 if (error || req->newptr == USER_ADDR_NULL) {
720 goto done;
721 }
722
723 if (!(kauth_cred_issuser(kauth_cred_get()) != 0 ||
724 IOCurrentTaskHasEntitlement("com.apple.private.networking.elevated-logging"))) {
725 #if (DEBUG || DEVELOPMENT)
726 os_log(OS_LOG_DEFAULT, "%s:%s: sysctl not allowed\n",
727 proc_name_string, __func__);
728 #endif
729 error = EPERM;
730 goto done;
731 }
732
733 /* impose bounds */
734 if (value < 0) {
735 error = EINVAL;
736 goto done;
737 }
738
739 nd6_debug = value;
740
741 done:
742 #if (DEBUG || DEVELOPMENT)
743 os_log(OS_LOG_DEFAULT, "%s:%s return: nd6_debug is %d "
744 "and error is %d\n", proc_name_string, __func__, nd6_debug, error);
745 #endif
746 return error;
747 }
748
749 /*
750 * One single sysctl to set v6 stack profile for IPv6 compliance testing.
751 * A lot of compliance test suites are not aware of other enhancements in IPv6
752 * protocol and expect some arguably obsolete behavior.
753 */
754 static int v6_compliance_profile;
755 static int
756 sysctl_set_v6_compliance_profile SYSCTL_HANDLER_ARGS
757 {
758 #pragma unused(oidp, arg2)
759 int changed, error;
760 int value = *(int *) arg1;
761
762 error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
763 if (error || !changed) {
764 return error;
765 }
766
767 if (value != 0 && value != 1) {
768 return ERANGE;
769 }
770
771 if (value == 1) {
772 ip6_use_tempaddr = 0;
773 dad_enhanced = 0;
774 icmp6_rediraccept = 1;
775 nd6_optimistic_dad = 0;
776 nd6_process_rti = ND6_PROCESS_RTI_ENABLE;
777 } else {
778 ip6_use_tempaddr = IP6_USE_TMPADDR_DEFAULT;
779 dad_enhanced = ND6_DAD_ENHANCED_DEFAULT;
780 icmp6_rediraccept = ICMP6_REDIRACCEPT_DEFAULT;
781 nd6_optimistic_dad = ND6_OPTIMISTIC_DAD_DEFAULT;
782 nd6_process_rti = ND6_PROCESS_RTI_DEFAULT;
783 }
784
785 v6_compliance_profile = value;
786 return 0;
787 }
788
789 SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, compliance_profile,
790 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
791 &v6_compliance_profile, 0, sysctl_set_v6_compliance_profile,
792 "I", "set IPv6 compliance profile");
793
794 /* net.inet6.icmp6 */
795 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
796 rediraccept, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_rediraccept, 0, "");
797 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
798 redirtimeout, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_redirtimeout, 0, "");
799 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
800 &icmp6stat, icmp6stat, "");
801 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
802 nd6_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune, 0, "");
803 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
804 nd6_prune_lazy, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune_lazy, 0, "");
805 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
806 nd6_delay, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_delay, 0, "");
807 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
808 nd6_umaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_umaxtries, 0, "");
809 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
810 nd6_mmaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_mmaxtries, 0, "");
811 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
812 nd6_useloopback, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_useloopback, 0, "");
813 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ACCEPT_6TO4,
814 nd6_accept_6to4, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_accept_6to4, 0, "");
815 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
816 nodeinfo, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_nodeinfo, 0, "");
817 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
818 errppslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim, 0, "");
819 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT_RANDOM_INCR,
820 errppslimit_random_incr, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim_random_incr, 0, "");
821 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
822 rappslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6rappslim, 0, "");
823 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
824 nd6_onlink_ns_rfc4861, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_onlink_ns_rfc4861, 0,
825 "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
826 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_OPTIMISTIC_DAD,
827 nd6_optimistic_dad, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_optimistic_dad, 0, "");
828