bsd/netinet6/in6_proto.c

   1 /*
   2  * Copyright (c) 2008-2015 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
 108 #include <netinet/in.h>
 109 #include <netinet/in_systm.h>
 110 #include <netinet/in_var.h>
 111 #include <netinet/ip_encap.h>
 112 #include <netinet/ip.h>
 113 #include <netinet/ip_var.h>
 114 #include <netinet/ip6.h>
 115 #include <netinet6/ip6_var.h>
 116 #include <netinet6/in6_var.h>
 117 #include <netinet/icmp6.h>
 118
 119 #include <netinet/tcp.h>
 120 #include <netinet/tcp_timer.h>
 121 #include <netinet/tcp_var.h>
 122 #include <netinet/udp.h>
 123 #include <netinet/udp_var.h>
 124 #include <netinet6/tcp6_var.h>
 125 #include <netinet6/raw_ip6.h>
 126 #include <netinet6/udp6_var.h>
 127 #include <netinet6/nd6.h>
 128 #include <netinet6/mld6_var.h>
 129
 130 #if IPSEC
 131 #include <netinet6/ipsec.h>
 132 #if INET6
 133 #include <netinet6/ipsec6.h>
 134 #endif
 135 #include <netinet6/ah.h>
 136 #if INET6
 137 #include <netinet6/ah6.h>
 138 #endif
 139 #if IPSEC_ESP
 140 #include <netinet6/esp.h>
 141 #if INET6
 142 #include <netinet6/esp6.h>
 143 #endif
 144 #endif
 145 #include <netinet6/ipcomp.h>
 146 #if INET6
 147 #include <netinet6/ipcomp6.h>
 148 #endif
 149 #endif /*IPSEC*/
 150
 151 #include <netinet6/ip6protosw.h>
 152
 153 #include <net/net_osdep.h>
 154
 155 /*
 156  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 157  */
 158
 159 extern struct domain inet6domain_s;
 160 struct domain *inet6domain = NULL;
 161
 162 static struct pr_usrreqs nousrreqs;
 163 lck_mtx_t *inet6_domain_mutex;
 164
 165 static void in6_dinit(struct domain *);
 166 static int rip6_pr_output(struct mbuf *, struct socket *,
 167     struct sockaddr_in6 *, struct mbuf *);
 168
 169 struct ip6protosw inet6sw[] = {
 170 {
 171         .pr_type =              0,
 172         .pr_protocol =          IPPROTO_IPV6,
 173         .pr_init =              ip6_init,
 174         .pr_drain =             ip6_drain,
 175         .pr_usrreqs =           &nousrreqs,
 176 },
 177 {
 178         .pr_type =              SOCK_DGRAM,
 179         .pr_protocol =          IPPROTO_UDP,
 180         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK|PR_PCBLOCK|
 181                                 PR_EVCONNINFO|PR_PRECONN_WRITE,
 182         .pr_input =             udp6_input,
 183         .pr_ctlinput =          udp6_ctlinput,
 184         .pr_ctloutput =         ip6_ctloutput,
 185 #if !INET       /* don't call initialization twice */
 186         .pr_init =              udp_init,
 187 #endif /* !INET */
 188         .pr_usrreqs =           &udp6_usrreqs,
 189         .pr_lock =              udp_lock,
 190         .pr_unlock =            udp_unlock,
 191         .pr_getlock =           udp_getlock,
 192 },
 193 {
 194         .pr_type =              SOCK_STREAM,
 195         .pr_protocol =          IPPROTO_TCP,
 196         .pr_flags =             PR_CONNREQUIRED|PR_WANTRCVD|PR_PCBLOCK|
 197                                 PR_PROTOLOCK|PR_DISPOSE|PR_EVCONNINFO|
 198                                 PR_PRECONN_WRITE|PR_DATA_IDEMPOTENT,
 199         .pr_input =             tcp6_input,
 200         .pr_ctlinput =          tcp6_ctlinput,
 201         .pr_ctloutput =         tcp_ctloutput,
 202 #if !INET       /* don't call initialization and timeout routines twice */
 203         .pr_init =              tcp_init,
 204 #endif /* !INET */
 205         .pr_drain =             tcp_drain,
 206         .pr_usrreqs =           &tcp6_usrreqs,
 207         .pr_lock =              tcp_lock,
 208         .pr_unlock =            tcp_unlock,
 209         .pr_getlock =           tcp_getlock,
 210 },
 211 {
 212         .pr_type =              SOCK_RAW,
 213         .pr_protocol =          IPPROTO_RAW,
 214         .pr_flags =             PR_ATOMIC|PR_ADDR,
 215         .pr_input =             rip6_input,
 216         .pr_output =            rip6_pr_output,
 217         .pr_ctlinput =          rip6_ctlinput,
 218         .pr_ctloutput =         rip6_ctloutput,
 219 #if !INET       /* don't call initialization and timeout routines twice */
 220         .pr_init =              rip_init,
 221 #endif /* !INET */
 222         .pr_usrreqs =           &rip6_usrreqs,
 223         .pr_unlock =            rip_unlock,
 224 },
 225 {
 226         .pr_type =              SOCK_RAW,
 227         .pr_protocol =          IPPROTO_ICMPV6,
 228         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 229         .pr_input =             icmp6_input,
 230         .pr_output =            rip6_pr_output,
 231         .pr_ctlinput =          rip6_ctlinput,
 232         .pr_ctloutput =         rip6_ctloutput,
 233         .pr_init =              icmp6_init,
 234         .pr_usrreqs =           &rip6_usrreqs,
 235         .pr_unlock =            rip_unlock,
 236 },
 237 {
 238         .pr_type =              SOCK_DGRAM,
 239         .pr_protocol =          IPPROTO_ICMPV6,
 240         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 241         .pr_input =             icmp6_input,
 242         .pr_output =            rip6_pr_output,
 243         .pr_ctlinput =          rip6_ctlinput,
 244         .pr_ctloutput =         icmp6_dgram_ctloutput,
 245         .pr_init =              icmp6_init,
 246         .pr_usrreqs =           &icmp6_dgram_usrreqs,
 247         .pr_unlock =            rip_unlock,
 248 },
 249 {
 250         .pr_type =              SOCK_RAW,
 251         .pr_protocol =          IPPROTO_DSTOPTS,
 252         .pr_flags =             PR_ATOMIC|PR_ADDR,
 253         .pr_input =             dest6_input,
 254         .pr_usrreqs =           &nousrreqs,
 255 },
 256 {
 257         .pr_type =              SOCK_RAW,
 258         .pr_protocol =          IPPROTO_ROUTING,
 259         .pr_flags =             PR_ATOMIC|PR_ADDR,
 260         .pr_input =             route6_input,
 261         .pr_usrreqs =           &nousrreqs,
 262 },
 263 {
 264         .pr_type =              SOCK_RAW,
 265         .pr_protocol =          IPPROTO_FRAGMENT,
 266         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 267         .pr_input =             frag6_input,
 268         .pr_usrreqs =           &nousrreqs,
 269 },
 270 #if IPSEC
 271 {
 272         .pr_type =              SOCK_RAW,
 273         .pr_protocol =          IPPROTO_AH,
 274         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 275         .pr_input =             ah6_input,
 276         .pr_usrreqs =           &nousrreqs,
 277 },
 278 #if IPSEC_ESP
 279 {
 280         .pr_type =              SOCK_RAW,
 281         .pr_protocol =          IPPROTO_ESP,
 282         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 283         .pr_input =             esp6_input,
 284         .pr_ctlinput =          esp6_ctlinput,
 285         .pr_usrreqs =           &nousrreqs,
 286 },
 287 #endif /* IPSEC_ESP */
 288 {
 289         .pr_type =              SOCK_RAW,
 290         .pr_protocol =          IPPROTO_IPCOMP,
 291         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 292         .pr_input =             ipcomp6_input,
 293         .pr_usrreqs =           &nousrreqs,
 294 },
 295 #endif /* IPSEC */
 296 #if INET
 297 {
 298         .pr_type =              SOCK_RAW,
 299         .pr_protocol =          IPPROTO_IPV4,
 300         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 301         .pr_input =             encap6_input,
 302         .pr_output =            rip6_pr_output,
 303         .pr_ctloutput =         rip6_ctloutput,
 304         .pr_init =              encap6_init,
 305         .pr_usrreqs =           &rip6_usrreqs,
 306         .pr_unlock =            rip_unlock,
 307 },
 308 #endif /*INET*/
 309 {
 310         .pr_type =              SOCK_RAW,
 311         .pr_protocol =          IPPROTO_IPV6,
 312         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 313         .pr_input =             encap6_input,
 314         .pr_output =            rip6_pr_output,
 315         .pr_ctloutput =         rip6_ctloutput,
 316         .pr_init =              encap6_init,
 317         .pr_usrreqs =           &rip6_usrreqs,
 318         .pr_unlock =            rip_unlock,
 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 },
 331 };
 332
 333 int in6_proto_count = (sizeof (inet6sw) / sizeof (struct ip6protosw));
 334
 335 struct domain inet6domain_s = {
 336         .dom_family =           PF_INET6,
 337         .dom_flags =            DOM_REENTRANT,
 338         .dom_name =             "internet6",
 339         .dom_init =             in6_dinit,
 340         .dom_rtattach =         in6_inithead,
 341         .dom_rtoffset =         offsetof(struct sockaddr_in6, sin6_addr) << 3,
 342         .dom_maxrtkey =         sizeof (struct sockaddr_in6),
 343         .dom_protohdrlen =      sizeof (struct sockaddr_in6),
 344 };
 345
 346 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
 347 void
 348 in6_dinit(struct domain *dp)
 349 {
 350         struct ip6protosw *pr;
 351         int i;
 352
 353         VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
 354         VERIFY(inet6domain == NULL);
 355
 356         inet6domain = dp;
 357
 358         _CASSERT(sizeof (struct protosw) == sizeof (struct ip6protosw));
 359         _CASSERT(offsetof(struct ip6protosw, pr_entry) ==
 360             offsetof(struct protosw, pr_entry));
 361         _CASSERT(offsetof(struct ip6protosw, pr_domain) ==
 362             offsetof(struct protosw, pr_domain));
 363         _CASSERT(offsetof(struct ip6protosw, pr_protosw) ==
 364             offsetof(struct protosw, pr_protosw));
 365         _CASSERT(offsetof(struct ip6protosw, pr_type) ==
 366             offsetof(struct protosw, pr_type));
 367         _CASSERT(offsetof(struct ip6protosw, pr_protocol) ==
 368             offsetof(struct protosw, pr_protocol));
 369         _CASSERT(offsetof(struct ip6protosw, pr_flags) ==
 370             offsetof(struct protosw, pr_flags));
 371         _CASSERT(offsetof(struct ip6protosw, pr_input) ==
 372             offsetof(struct protosw, pr_input));
 373         _CASSERT(offsetof(struct ip6protosw, pr_output) ==
 374             offsetof(struct protosw, pr_output));
 375         _CASSERT(offsetof(struct ip6protosw, pr_ctlinput) ==
 376             offsetof(struct protosw, pr_ctlinput));
 377         _CASSERT(offsetof(struct ip6protosw, pr_ctloutput) ==
 378             offsetof(struct protosw, pr_ctloutput));
 379         _CASSERT(offsetof(struct ip6protosw, pr_usrreqs) ==
 380             offsetof(struct protosw, pr_usrreqs));
 381         _CASSERT(offsetof(struct ip6protosw, pr_init) ==
 382             offsetof(struct protosw, pr_init));
 383         _CASSERT(offsetof(struct ip6protosw, pr_drain) ==
 384             offsetof(struct protosw, pr_drain));
 385         _CASSERT(offsetof(struct ip6protosw, pr_sysctl) ==
 386             offsetof(struct protosw, pr_sysctl));
 387         _CASSERT(offsetof(struct ip6protosw, pr_lock) ==
 388             offsetof(struct protosw, pr_lock));
 389         _CASSERT(offsetof(struct ip6protosw, pr_unlock) ==
 390             offsetof(struct protosw, pr_unlock));
 391         _CASSERT(offsetof(struct ip6protosw, pr_getlock) ==
 392             offsetof(struct protosw, pr_getlock));
 393         _CASSERT(offsetof(struct ip6protosw, pr_filter_head) ==
 394             offsetof(struct protosw, pr_filter_head));
 395         _CASSERT(offsetof(struct ip6protosw, pr_old) ==
 396             offsetof(struct protosw, pr_old));
 397
 398         /*
 399          * Attach first, then initialize.  ip6_init() needs raw IP6 handler.
 400          */
 401         for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++)
 402                 net_add_proto((struct protosw *)pr, dp, 0);
 403         for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++)
 404                 net_init_proto((struct protosw *)pr, dp);
 405
 406         inet6_domain_mutex = dp->dom_mtx;
 407 }
 408
 409 static int
 410 rip6_pr_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *sin6,
 411     struct mbuf *m1)
 412 {
 413 #pragma unused(m, so, sin6, m1)
 414         panic("%s\n", __func__);
 415         /* NOTREACHED */
 416         return (0);
 417 }
 418
 419 /*
 420  * Internet configuration info
 421  */
 422 #ifndef IPV6FORWARDING
 423 #if GATEWAY6
 424 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 425 #else
 426 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 427 #endif /* GATEWAY6 */
 428 #endif /* !IPV6FORWARDING */
 429
 430 #ifndef IPV6_SENDREDIRECTS
 431 #define IPV6_SENDREDIRECTS      1
 432 #endif
 433
 434 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 435 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 436 int     ip6_defhlim = IPV6_DEFHLIM;
 437 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 438 int     ip6_accept_rtadv = 1;   /* deprecated */
 439 int     ip6_log_interval = 5;
 440 int     ip6_hdrnestlimit = 15;  /* How many header options will we process? */
 441 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 442 int     ip6_auto_flowlabel = 1;
 443 int     ip6_gif_hlim = 0;
 444 int     ip6_use_deprecated = 1; /* allow deprecated addr [RFC 4862, 5.5.4] */
 445 int     ip6_rr_prune = 5;       /* router renumbering prefix
 446                                  * walk list every 5 sec.    */
 447 int     ip6_mcast_pmtu = 0;     /* enable pMTU discovery for multicast? */
 448 int     ip6_v6only = 0;         /* Mapped addresses off by default -  Radar 3347718  -- REVISITING FOR 10.7 -- TESTING WITH MAPPED@ OFF */
 449
 450 int     ip6_neighborgcthresh = 1024;    /* Threshold # of NDP entries for GC */
 451 int     ip6_maxifprefixes = 16;         /* Max acceptable prefixes via RA per IF */
 452 int     ip6_maxifdefrouters = 16;       /* Max acceptable def routers via RA */
 453 int     ip6_maxdynroutes = 1024;        /* Max # of routes created via redirect */
 454 int     ip6_only_allow_rfc4193_prefix = 0;      /* Only allow RFC4193 style Unique Local IPv6 Unicast prefixes */
 455
 456 static int ip6_keepfaith = 0;
 457 uint64_t ip6_log_time = 0;
 458 int     nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
 459
 460 /* icmp6 */
 461 /*
 462  * BSDI4 defines these variables in in_proto.c...
 463  * XXX: what if we don't define INET? Should we define pmtu6_expire
 464  * or so? (jinmei@kame.net 19990310)
 465  */
 466 int pmtu_expire = 60*10;
 467 int pmtu_probe = 60*2;
 468
 469 /* raw IP6 parameters */
 470 /*
 471  * Nominal space allocated to a raw ip socket.
 472  */
 473 #define RIPV6SNDQ       8192
 474 #define RIPV6RCVQ       8192
 475
 476 u_int32_t       rip6_sendspace = RIPV6SNDQ;
 477 u_int32_t       rip6_recvspace = RIPV6RCVQ;
 478
 479 /* ICMPV6 parameters */
 480 int     icmp6_rediraccept = 0;          /* accept and process redirects */
 481 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 482 int     icmp6errppslim = 500;           /* 500 packets per second */
 483 int     icmp6rappslim = 10;             /* 10 packets per second */
 484 int     icmp6_nodeinfo = 3;             /* enable/disable NI response */
 485
 486 /* UDP on IP6 parameters */
 487 int     udp6_sendspace = 9216;          /* really max datagram size */
 488 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 489                                         /* 40 1K datagrams */
 490
 491 /*
 492  * sysctl related items.
 493  */
 494 SYSCTL_NODE(_net, PF_INET6, inet6,
 495         CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet6 Family");
 496
 497 /* net.inet6 */
 498 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6,
 499         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "IP6");
 500 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,
 501         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "ICMP6");
 502 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6,
 503         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "UDP6");
 504 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6,
 505         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "TCP6");
 506 #if IPSEC
 507 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6,
 508         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "IPSEC6");
 509 #endif /* IPSEC */
 510
 511 /* net.inet6.ip6 */
 512 static int
 513 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
 514 {
 515 #pragma unused(oidp, arg2)
 516         int error = 0;
 517         int old;
 518
 519         error = SYSCTL_OUT(req, arg1, sizeof(int));
 520         if (error || !req->newptr)
 521                 return (error);
 522         old = ip6_temp_preferred_lifetime;
 523         error = SYSCTL_IN(req, arg1, sizeof(int));
 524         if (ip6_temp_preferred_lifetime > ND6_MAX_LIFETIME ||
 525             ip6_temp_preferred_lifetime <
 526             ip6_desync_factor + ip6_temp_regen_advance) {
 527                 ip6_temp_preferred_lifetime = old;
 528                 return (EINVAL);
 529         }
 530         return (error);
 531 }
 532
 533 static int
 534 sysctl_ip6_tempvltime SYSCTL_HANDLER_ARGS
 535 {
 536 #pragma unused(oidp, arg2)
 537         int error = 0;
 538         int old;
 539
 540         error = SYSCTL_OUT(req, arg1, sizeof(int));
 541         if (error || !req->newptr)
 542                 return (error);
 543         old = ip6_temp_valid_lifetime;
 544         error = SYSCTL_IN(req, arg1, sizeof(int));
 545         if (ip6_temp_valid_lifetime > ND6_MAX_LIFETIME ||
 546             ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 547                 ip6_temp_valid_lifetime = old;
 548                 return (EINVAL);
 549         }
 550         return (error);
 551 }
 552
 553 static int
 554 ip6_getstat SYSCTL_HANDLER_ARGS
 555 {
 556 #pragma unused(oidp, arg1, arg2)
 557         if (req->oldptr == USER_ADDR_NULL)
 558                 req->oldlen = (size_t)sizeof (struct ip6stat);
 559
 560         return (SYSCTL_OUT(req, &ip6stat, MIN(sizeof (ip6stat), req->oldlen)));
 561 }
 562
 563 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
 564         forwarding, CTLFLAG_RW | CTLFLAG_LOCKED,        &ip6_forwarding,        0, "");
 565 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
 566         redirect, CTLFLAG_RW | CTLFLAG_LOCKED,  &ip6_sendredirects,     0, "");
 567 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 568         hlim, CTLFLAG_RW | CTLFLAG_LOCKED,              &ip6_defhlim,   0, "");
 569 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_STATS, stats,
 570         CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
 571         0, 0, ip6_getstat, "S,ip6stat", "");
 572 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
 573         accept_rtadv, CTLFLAG_RD | CTLFLAG_LOCKED,
 574         &ip6_accept_rtadv,      0, "");
 575 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 576         keepfaith, CTLFLAG_RD | CTLFLAG_LOCKED,         &ip6_keepfaith, 0, "");
 577 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 578         log_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_log_interval,   0, "");
 579 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
 580         hdrnestlimit, CTLFLAG_RW | CTLFLAG_LOCKED,      &ip6_hdrnestlimit,      0, "");
 581 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
 582         dad_count, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_dad_count, 0, "");
 583 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
 584         auto_flowlabel, CTLFLAG_RW | CTLFLAG_LOCKED,    &ip6_auto_flowlabel,    0, "");
 585 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
 586         defmcasthlim, CTLFLAG_RW | CTLFLAG_LOCKED,      &ip6_defmcasthlim,      0, "");
 587 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
 588         gifhlim, CTLFLAG_RW | CTLFLAG_LOCKED,   &ip6_gif_hlim,                  0, "");
 589 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 590         kame_version, CTLFLAG_RD | CTLFLAG_LOCKED, (void *)((uintptr_t)(__KAME_VERSION)),               0, "");
 591 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
 592         use_deprecated, CTLFLAG_RW | CTLFLAG_LOCKED,    &ip6_use_deprecated,    0, "");
 593 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 594         rr_prune, CTLFLAG_RW | CTLFLAG_LOCKED,  &ip6_rr_prune,                  0, "");
 595 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
 596         use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_tempaddr,           0, "");
 597 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 598            CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_preferred_lifetime, 0,
 599            sysctl_ip6_temppltime, "I", "");
 600 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 601            CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_valid_lifetime, 0,
 602            sysctl_ip6_tempvltime, "I", "");
 603 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
 604         v6only, CTLFLAG_RW | CTLFLAG_LOCKED,    &ip6_v6only,            0, "");
 605 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
 606         auto_linklocal, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_linklocal,       0, "");
 607 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 608         &rip6stat, rip6stat, "");
 609 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
 610         prefer_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_prefer_tempaddr,     0, "");
 611 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
 612         use_defaultzone, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_defzone,         0,"");
 613 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
 614         mcast_pmtu, CTLFLAG_RW | CTLFLAG_LOCKED,        &ip6_mcast_pmtu,        0, "");
 615 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NEIGHBORGCTHRESH,
 616         neighborgcthresh, CTLFLAG_RW | CTLFLAG_LOCKED,  &ip6_neighborgcthresh,  0, "");
 617 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFPREFIXES,
 618         maxifprefixes, CTLFLAG_RW | CTLFLAG_LOCKED,     &ip6_maxifprefixes,     0, "");
 619 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFDEFROUTERS,
 620         maxifdefrouters, CTLFLAG_RW | CTLFLAG_LOCKED,   &ip6_maxifdefrouters,   0, "");
 621 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXDYNROUTES,
 622         maxdynroutes, CTLFLAG_RW | CTLFLAG_LOCKED,      &ip6_maxdynroutes,      0, "");
 623 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
 624         only_allow_rfc4193_prefixes, CTLFLAG_RW | CTLFLAG_LOCKED,
 625         &ip6_only_allow_rfc4193_prefix, 0, "");
 626
 627 /* net.inet6.icmp6 */
 628 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
 629         rediraccept, CTLFLAG_RW | CTLFLAG_LOCKED,       &icmp6_rediraccept,     0, "");
 630 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
 631         redirtimeout, CTLFLAG_RW | CTLFLAG_LOCKED,      &icmp6_redirtimeout,    0, "");
 632 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 633         &icmp6stat, icmp6stat, "");
 634 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
 635         nd6_prune, CTLFLAG_RW | CTLFLAG_LOCKED,         &nd6_prune,     0, "");
 636 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
 637         nd6_prune_lazy, CTLFLAG_RW | CTLFLAG_LOCKED,    &nd6_prune_lazy, 0, "");
 638 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
 639         nd6_delay, CTLFLAG_RW | CTLFLAG_LOCKED,         &nd6_delay,     0, "");
 640 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
 641         nd6_umaxtries, CTLFLAG_RW | CTLFLAG_LOCKED,     &nd6_umaxtries, 0, "");
 642 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
 643         nd6_mmaxtries, CTLFLAG_RW | CTLFLAG_LOCKED,     &nd6_mmaxtries, 0, "");
 644 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
 645         nd6_useloopback, CTLFLAG_RW | CTLFLAG_LOCKED,   &nd6_useloopback, 0, "");
 646 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ACCEPT_6TO4,
 647         nd6_accept_6to4, CTLFLAG_RW | CTLFLAG_LOCKED,   &nd6_accept_6to4, 0, "");
 648 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 649         nodeinfo, CTLFLAG_RW | CTLFLAG_LOCKED,  &icmp6_nodeinfo,        0, "");
 650 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 651         errppslimit, CTLFLAG_RW | CTLFLAG_LOCKED,       &icmp6errppslim,        0, "");
 652 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
 653         rappslimit, CTLFLAG_RW | CTLFLAG_LOCKED,        &icmp6rappslim, 0, "");
 654 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
 655         nd6_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_debug,             0, "");
 656 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
 657         nd6_onlink_ns_rfc4861, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_onlink_ns_rfc4861, 0,
 658         "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
 659 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_OPTIMISTIC_DAD,
 660         nd6_optimistic_dad, CTLFLAG_RW | CTLFLAG_LOCKED,        &nd6_optimistic_dad,            0, "");