bsd/netinet6/in6_proto.c

   1 /*
   2  * Copyright (c) 2008-2013 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/pim6_var.h>
 128 #include <netinet6/nd6.h>
 129 #include <netinet6/mld6_var.h>
 130
 131 #include <netinet6/ip6_mroute.h>
 132
 133 #if IPSEC
 134 #include <netinet6/ipsec.h>
 135 #if INET6
 136 #include <netinet6/ipsec6.h>
 137 #endif
 138 #include <netinet6/ah.h>
 139 #if INET6
 140 #include <netinet6/ah6.h>
 141 #endif
 142 #if IPSEC_ESP
 143 #include <netinet6/esp.h>
 144 #if INET6
 145 #include <netinet6/esp6.h>
 146 #endif
 147 #endif
 148 #include <netinet6/ipcomp.h>
 149 #if INET6
 150 #include <netinet6/ipcomp6.h>
 151 #endif
 152 #endif /*IPSEC*/
 153
 154 #include <netinet6/ip6protosw.h>
 155
 156 #include <net/net_osdep.h>
 157
 158 /*
 159  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 160  */
 161
 162 extern struct domain inet6domain_s;
 163 struct domain *inet6domain = NULL;
 164
 165 static struct pr_usrreqs nousrreqs;
 166 lck_mtx_t *inet6_domain_mutex;
 167
 168 static void in6_dinit(struct domain *);
 169 static int rip6_pr_output(struct mbuf *, struct socket *,
 170     struct sockaddr_in6 *, struct mbuf *);
 171
 172 struct ip6protosw inet6sw[] = {
 173 {
 174         .pr_type =              0,
 175         .pr_protocol =          IPPROTO_IPV6,
 176         .pr_init =              ip6_init,
 177         .pr_drain =             ip6_drain,
 178         .pr_usrreqs =           &nousrreqs,
 179 },
 180 {
 181         .pr_type =              SOCK_DGRAM,
 182         .pr_protocol =          IPPROTO_UDP,
 183         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK|PR_PCBLOCK|
 184                                 PR_EVCONNINFO,
 185         .pr_input =             udp6_input,
 186         .pr_ctlinput =          udp6_ctlinput,
 187         .pr_ctloutput =         ip6_ctloutput,
 188 #if !INET       /* don't call initialization twice */
 189         .pr_init =              udp_init,
 190 #endif /* !INET */
 191         .pr_usrreqs =           &udp6_usrreqs,
 192         .pr_lock =              udp_lock,
 193         .pr_unlock =            udp_unlock,
 194         .pr_getlock =           udp_getlock,
 195 },
 196 {
 197         .pr_type =              SOCK_STREAM,
 198         .pr_protocol =          IPPROTO_TCP,
 199         .pr_flags =             PR_CONNREQUIRED|PR_WANTRCVD|PR_PCBLOCK|
 200                                 PR_PROTOLOCK|PR_DISPOSE|PR_EVCONNINFO,
 201         .pr_input =             tcp6_input,
 202         .pr_ctlinput =          tcp6_ctlinput,
 203         .pr_ctloutput =         tcp_ctloutput,
 204 #if !INET       /* don't call initialization and timeout routines twice */
 205         .pr_init =              tcp_init,
 206 #endif /* !INET */
 207         .pr_drain =             tcp_drain,
 208         .pr_usrreqs =           &tcp6_usrreqs,
 209         .pr_lock =              tcp_lock,
 210         .pr_unlock =            tcp_unlock,
 211         .pr_getlock =           tcp_getlock,
 212 },
 213 {
 214         .pr_type =              SOCK_RAW,
 215         .pr_protocol =          IPPROTO_RAW,
 216         .pr_flags =             PR_ATOMIC|PR_ADDR,
 217         .pr_input =             rip6_input,
 218         .pr_output =            rip6_pr_output,
 219         .pr_ctlinput =          rip6_ctlinput,
 220         .pr_ctloutput =         rip6_ctloutput,
 221 #if !INET       /* don't call initialization and timeout routines twice */
 222         .pr_init =              rip_init,
 223 #endif /* !INET */
 224         .pr_usrreqs =           &rip6_usrreqs,
 225         .pr_unlock =            rip_unlock,
 226 },
 227 {
 228         .pr_type =              SOCK_RAW,
 229         .pr_protocol =          IPPROTO_ICMPV6,
 230         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 231         .pr_input =             icmp6_input,
 232         .pr_output =            rip6_pr_output,
 233         .pr_ctlinput =          rip6_ctlinput,
 234         .pr_ctloutput =         rip6_ctloutput,
 235         .pr_init =              icmp6_init,
 236         .pr_usrreqs =           &rip6_usrreqs,
 237         .pr_unlock =            rip_unlock,
 238 },
 239 {
 240         .pr_type =              SOCK_DGRAM,
 241         .pr_protocol =          IPPROTO_ICMPV6,
 242         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 243         .pr_input =             icmp6_input,
 244         .pr_output =            rip6_pr_output,
 245         .pr_ctlinput =          rip6_ctlinput,
 246         .pr_ctloutput =         icmp6_dgram_ctloutput,
 247         .pr_init =              icmp6_init,
 248         .pr_usrreqs =           &icmp6_dgram_usrreqs,
 249         .pr_unlock =            rip_unlock,
 250 },
 251 {
 252         .pr_type =              SOCK_RAW,
 253         .pr_protocol =          IPPROTO_DSTOPTS,
 254         .pr_flags =             PR_ATOMIC|PR_ADDR,
 255         .pr_input =             dest6_input,
 256         .pr_usrreqs =           &nousrreqs,
 257 },
 258 {
 259         .pr_type =              SOCK_RAW,
 260         .pr_protocol =          IPPROTO_ROUTING,
 261         .pr_flags =             PR_ATOMIC|PR_ADDR,
 262         .pr_input =             route6_input,
 263         .pr_usrreqs =           &nousrreqs,
 264 },
 265 {
 266         .pr_type =              SOCK_RAW,
 267         .pr_protocol =          IPPROTO_FRAGMENT,
 268         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 269         .pr_input =             frag6_input,
 270         .pr_usrreqs =           &nousrreqs,
 271 },
 272 #if IPSEC
 273 {
 274         .pr_type =              SOCK_RAW,
 275         .pr_protocol =          IPPROTO_AH,
 276         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 277         .pr_input =             ah6_input,
 278         .pr_usrreqs =           &nousrreqs,
 279 },
 280 #if IPSEC_ESP
 281 {
 282         .pr_type =              SOCK_RAW,
 283         .pr_protocol =          IPPROTO_ESP,
 284         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 285         .pr_input =             esp6_input,
 286         .pr_ctlinput =          esp6_ctlinput,
 287         .pr_usrreqs =           &nousrreqs,
 288 },
 289 #endif /* IPSEC_ESP */
 290 {
 291         .pr_type =              SOCK_RAW,
 292         .pr_protocol =          IPPROTO_IPCOMP,
 293         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 294         .pr_input =             ipcomp6_input,
 295         .pr_usrreqs =           &nousrreqs,
 296 },
 297 #endif /* IPSEC */
 298 #if INET
 299 {
 300         .pr_type =              SOCK_RAW,
 301         .pr_protocol =          IPPROTO_IPV4,
 302         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 303         .pr_input =             encap6_input,
 304         .pr_output =            rip6_pr_output,
 305         .pr_ctloutput =         rip6_ctloutput,
 306         .pr_init =              encap6_init,
 307         .pr_usrreqs =           &rip6_usrreqs,
 308         .pr_unlock =            rip_unlock,
 309 },
 310 #endif /*INET*/
 311 {
 312         .pr_type =              SOCK_RAW,
 313         .pr_protocol =          IPPROTO_IPV6,
 314         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 315         .pr_input =             encap6_input,
 316         .pr_output =            rip6_pr_output,
 317         .pr_ctloutput =         rip6_ctloutput,
 318         .pr_init =              encap6_init,
 319         .pr_usrreqs =           &rip6_usrreqs,
 320         .pr_unlock =            rip_unlock,
 321 },
 322 #if MROUTING
 323 {
 324         .pr_type =              SOCK_RAW,
 325         .pr_protocol =          IPPROTO_PIM,
 326         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 327         .pr_input =             pim6_input,
 328         .pr_output =            rip6_pr_output,
 329         .pr_ctloutput =         rip6_ctloutput,
 330         .pr_usrreqs =           &rip6_usrreqs,
 331         .pr_unlock =            rip_unlock,
 332 },
 333 #endif /* MROUTING */
 334 /* raw wildcard */
 335 {
 336         .pr_type =              SOCK_RAW,
 337         .pr_protocol =          0,
 338         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 339         .pr_input =             rip6_input,
 340         .pr_output =            rip6_pr_output,
 341         .pr_ctloutput =         rip6_ctloutput,
 342         .pr_usrreqs =           &rip6_usrreqs,
 343         .pr_unlock =            rip_unlock,
 344 },
 345 };
 346
 347 int in6_proto_count = (sizeof (inet6sw) / sizeof (struct ip6protosw));
 348
 349 struct domain inet6domain_s = {
 350         .dom_family =           PF_INET6,
 351         .dom_flags =            DOM_REENTRANT,
 352         .dom_name =             "internet6",
 353         .dom_init =             in6_dinit,
 354         .dom_rtattach =         in6_inithead,
 355         .dom_rtoffset =         offsetof(struct sockaddr_in6, sin6_addr) << 3,
 356         .dom_maxrtkey =         sizeof (struct sockaddr_in6),
 357         .dom_protohdrlen =      sizeof (struct sockaddr_in6),
 358 };
 359
 360 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
 361 void
 362 in6_dinit(struct domain *dp)
 363 {
 364         struct ip6protosw *pr;
 365         int i;
 366
 367         VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
 368         VERIFY(inet6domain == NULL);
 369
 370         inet6domain = dp;
 371
 372         _CASSERT(sizeof (struct protosw) == sizeof (struct ip6protosw));
 373         _CASSERT(offsetof(struct ip6protosw, pr_entry) ==
 374             offsetof(struct protosw, pr_entry));
 375         _CASSERT(offsetof(struct ip6protosw, pr_domain) ==
 376             offsetof(struct protosw, pr_domain));
 377         _CASSERT(offsetof(struct ip6protosw, pr_protosw) ==
 378             offsetof(struct protosw, pr_protosw));
 379         _CASSERT(offsetof(struct ip6protosw, pr_type) ==
 380             offsetof(struct protosw, pr_type));
 381         _CASSERT(offsetof(struct ip6protosw, pr_protocol) ==
 382             offsetof(struct protosw, pr_protocol));
 383         _CASSERT(offsetof(struct ip6protosw, pr_flags) ==
 384             offsetof(struct protosw, pr_flags));
 385         _CASSERT(offsetof(struct ip6protosw, pr_input) ==
 386             offsetof(struct protosw, pr_input));
 387         _CASSERT(offsetof(struct ip6protosw, pr_output) ==
 388             offsetof(struct protosw, pr_output));
 389         _CASSERT(offsetof(struct ip6protosw, pr_ctlinput) ==
 390             offsetof(struct protosw, pr_ctlinput));
 391         _CASSERT(offsetof(struct ip6protosw, pr_ctloutput) ==
 392             offsetof(struct protosw, pr_ctloutput));
 393         _CASSERT(offsetof(struct ip6protosw, pr_usrreqs) ==
 394             offsetof(struct protosw, pr_usrreqs));
 395         _CASSERT(offsetof(struct ip6protosw, pr_init) ==
 396             offsetof(struct protosw, pr_init));
 397         _CASSERT(offsetof(struct ip6protosw, pr_drain) ==
 398             offsetof(struct protosw, pr_drain));
 399         _CASSERT(offsetof(struct ip6protosw, pr_sysctl) ==
 400             offsetof(struct protosw, pr_sysctl));
 401         _CASSERT(offsetof(struct ip6protosw, pr_lock) ==
 402             offsetof(struct protosw, pr_lock));
 403         _CASSERT(offsetof(struct ip6protosw, pr_unlock) ==
 404             offsetof(struct protosw, pr_unlock));
 405         _CASSERT(offsetof(struct ip6protosw, pr_getlock) ==
 406             offsetof(struct protosw, pr_getlock));
 407         _CASSERT(offsetof(struct ip6protosw, pr_filter_head) ==
 408             offsetof(struct protosw, pr_filter_head));
 409         _CASSERT(offsetof(struct ip6protosw, pr_old) ==
 410             offsetof(struct protosw, pr_old));
 411
 412         /*
 413          * Attach first, then initialize.  ip6_init() needs raw IP6 handler.
 414          */
 415         for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++)
 416                 net_add_proto((struct protosw *)pr, dp, 0);
 417         for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++)
 418                 net_init_proto((struct protosw *)pr, dp);
 419
 420         inet6_domain_mutex = dp->dom_mtx;
 421 }
 422
 423 static int
 424 rip6_pr_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *sin6,
 425     struct mbuf *m1)
 426 {
 427 #pragma unused(m, so, sin6, m1)
 428         panic("%s\n", __func__);
 429         /* NOTREACHED */
 430         return (0);
 431 }
 432
 433 /*
 434  * Internet configuration info
 435  */
 436 #ifndef IPV6FORWARDING
 437 #if GATEWAY6
 438 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 439 #else
 440 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 441 #endif /* GATEWAY6 */
 442 #endif /* !IPV6FORWARDING */
 443
 444 #ifndef IPV6_SENDREDIRECTS
 445 #define IPV6_SENDREDIRECTS      1
 446 #endif
 447
 448 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 449 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 450 int     ip6_defhlim = IPV6_DEFHLIM;
 451 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 452 int     ip6_accept_rtadv = 1;   /* deprecated */
 453 int     ip6_log_interval = 5;
 454 int     ip6_hdrnestlimit = 15;  /* How many header options will we process? */
 455 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 456 int     ip6_auto_flowlabel = 1;
 457 int     ip6_gif_hlim = 0;
 458 int     ip6_use_deprecated = 1; /* allow deprecated addr [RFC 4862, 5.5.4] */
 459 int     ip6_rr_prune = 5;       /* router renumbering prefix
 460                                  * walk list every 5 sec.    */
 461 int     ip6_mcast_pmtu = 0;     /* enable pMTU discovery for multicast? */
 462 int     ip6_v6only = 0;         /* Mapped addresses off by default -  Radar 3347718  -- REVISITING FOR 10.7 -- TESTING WITH MAPPED@ OFF */
 463
 464 int     ip6_neighborgcthresh = 1024;    /* Threshold # of NDP entries for GC */
 465 int     ip6_maxifprefixes = 16;         /* Max acceptable prefixes via RA per IF */
 466 int     ip6_maxifdefrouters = 16;       /* Max acceptable def routers via RA */
 467 int     ip6_maxdynroutes = 1024;        /* Max # of routes created via redirect */
 468 int     ip6_only_allow_rfc4193_prefix = 0;      /* Only allow RFC4193 style Unique Local IPv6 Unicast prefixes */
 469
 470 static int ip6_keepfaith = 0;
 471 uint64_t ip6_log_time = 0;
 472 int     nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
 473
 474 /* icmp6 */
 475 /*
 476  * BSDI4 defines these variables in in_proto.c...
 477  * XXX: what if we don't define INET? Should we define pmtu6_expire
 478  * or so? (jinmei@kame.net 19990310)
 479  */
 480 int pmtu_expire = 60*10;
 481 int pmtu_probe = 60*2;
 482
 483 /* raw IP6 parameters */
 484 /*
 485  * Nominal space allocated to a raw ip socket.
 486  */
 487 #define RIPV6SNDQ       8192
 488 #define RIPV6RCVQ       8192
 489
 490 u_int32_t       rip6_sendspace = RIPV6SNDQ;
 491 u_int32_t       rip6_recvspace = RIPV6RCVQ;
 492
 493 /* ICMPV6 parameters */
 494 int     icmp6_rediraccept = 1;          /* accept and process redirects */
 495 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 496 int     icmp6errppslim = 500;           /* 500 packets per second */
 497 int     icmp6_nodeinfo = 3;             /* enable/disable NI response */
 498
 499 /* UDP on IP6 parameters */
 500 int     udp6_sendspace = 9216;          /* really max datagram size */
 501 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 502                                         /* 40 1K datagrams */
 503
 504 /*
 505  * sysctl related items.
 506  */
 507 SYSCTL_NODE(_net, PF_INET6, inet6,
 508         CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet6 Family");
 509
 510 /* net.inet6 */
 511 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6,
 512         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "IP6");
 513 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,
 514         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "ICMP6");
 515 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6,
 516         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "UDP6");
 517 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6,
 518         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "TCP6");
 519 #if IPSEC
 520 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6,
 521         CTLFLAG_RW|CTLFLAG_LOCKED, 0, "IPSEC6");
 522 #endif /* IPSEC */
 523
 524 /* net.inet6.ip6 */
 525 static int
 526 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
 527 {
 528 #pragma unused(oidp, arg2)
 529         int error = 0;
 530         int old;
 531
 532         error = SYSCTL_OUT(req, arg1, sizeof(int));
 533         if (error || !req->newptr)
 534                 return (error);
 535         old = ip6_temp_preferred_lifetime;
 536         error = SYSCTL_IN(req, arg1, sizeof(int));
 537         if (ip6_temp_preferred_lifetime > ND6_MAX_LIFETIME ||
 538             ip6_temp_preferred_lifetime <
 539             ip6_desync_factor + ip6_temp_regen_advance) {
 540                 ip6_temp_preferred_lifetime = old;
 541                 return (EINVAL);
 542         }
 543         return (error);
 544 }
 545
 546 static int
 547 sysctl_ip6_tempvltime SYSCTL_HANDLER_ARGS
 548 {
 549 #pragma unused(oidp, arg2)
 550         int error = 0;
 551         int old;
 552
 553         error = SYSCTL_OUT(req, arg1, sizeof(int));
 554         if (error || !req->newptr)
 555                 return (error);
 556         old = ip6_temp_valid_lifetime;
 557         error = SYSCTL_IN(req, arg1, sizeof(int));
 558         if (ip6_temp_valid_lifetime > ND6_MAX_LIFETIME ||
 559             ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 560                 ip6_temp_valid_lifetime = old;
 561                 return (EINVAL);
 562         }
 563         return (error);
 564 }
 565
 566 static int
 567 ip6_getstat SYSCTL_HANDLER_ARGS
 568 {
 569 #pragma unused(oidp, arg1, arg2)
 570         if (req->oldptr == USER_ADDR_NULL)
 571                 req->oldlen = (size_t)sizeof (struct ip6stat);
 572
 573         return (SYSCTL_OUT(req, &ip6stat, MIN(sizeof (ip6stat), req->oldlen)));
 574 }
 575
 576 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
 577         forwarding, CTLFLAG_RW | CTLFLAG_LOCKED,        &ip6_forwarding,        0, "");
 578 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
 579         redirect, CTLFLAG_RW | CTLFLAG_LOCKED,  &ip6_sendredirects,     0, "");
 580 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 581         hlim, CTLFLAG_RW | CTLFLAG_LOCKED,              &ip6_defhlim,   0, "");
 582 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 583         0, 0, ip6_getstat, "S,ip6stat", "");
 584 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
 585         accept_rtadv, CTLFLAG_RD | CTLFLAG_LOCKED,
 586         &ip6_accept_rtadv,      0, "");
 587 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 588         keepfaith, CTLFLAG_RD | CTLFLAG_LOCKED,         &ip6_keepfaith, 0, "");
 589 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 590         log_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_log_interval,   0, "");
 591 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
 592         hdrnestlimit, CTLFLAG_RW | CTLFLAG_LOCKED,      &ip6_hdrnestlimit,      0, "");
 593 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
 594         dad_count, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_dad_count, 0, "");
 595 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
 596         auto_flowlabel, CTLFLAG_RW | CTLFLAG_LOCKED,    &ip6_auto_flowlabel,    0, "");
 597 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
 598         defmcasthlim, CTLFLAG_RW | CTLFLAG_LOCKED,      &ip6_defmcasthlim,      0, "");
 599 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
 600         gifhlim, CTLFLAG_RW | CTLFLAG_LOCKED,   &ip6_gif_hlim,                  0, "");
 601 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 602         kame_version, CTLFLAG_RD | CTLFLAG_LOCKED, (void *)((uintptr_t)(__KAME_VERSION)),               0, "");
 603 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
 604         use_deprecated, CTLFLAG_RW | CTLFLAG_LOCKED,    &ip6_use_deprecated,    0, "");
 605 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 606         rr_prune, CTLFLAG_RW | CTLFLAG_LOCKED,  &ip6_rr_prune,                  0, "");
 607 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
 608         use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_tempaddr,           0, "");
 609 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 610            CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_preferred_lifetime, 0,
 611            sysctl_ip6_temppltime, "I", "");
 612 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 613            CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_valid_lifetime, 0,
 614            sysctl_ip6_tempvltime, "I", "");
 615 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
 616         v6only, CTLFLAG_RW | CTLFLAG_LOCKED,    &ip6_v6only,            0, "");
 617 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
 618         auto_linklocal, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_linklocal,       0, "");
 619 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 620         &rip6stat, rip6stat, "");
 621 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
 622         prefer_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_prefer_tempaddr,     0, "");
 623 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
 624         use_defaultzone, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_defzone,         0,"");
 625 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
 626         mcast_pmtu, CTLFLAG_RW | CTLFLAG_LOCKED,        &ip6_mcast_pmtu,        0, "");
 627 #if MROUTING
 628 SYSCTL_STRUCT(_net_inet6_ip6, OID_AUTO, mrt6stat, CTLFLAG_RD | CTLFLAG_LOCKED,
 629         &mrt6stat, mrt6stat, "");
 630 #endif
 631 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NEIGHBORGCTHRESH,
 632         neighborgcthresh, CTLFLAG_RW | CTLFLAG_LOCKED,  &ip6_neighborgcthresh,  0, "");
 633 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFPREFIXES,
 634         maxifprefixes, CTLFLAG_RW | CTLFLAG_LOCKED,     &ip6_maxifprefixes,     0, "");
 635 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFDEFROUTERS,
 636         maxifdefrouters, CTLFLAG_RW | CTLFLAG_LOCKED,   &ip6_maxifdefrouters,   0, "");
 637 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXDYNROUTES,
 638         maxdynroutes, CTLFLAG_RW | CTLFLAG_LOCKED,      &ip6_maxdynroutes,      0, "");
 639 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
 640         only_allow_rfc4193_prefixes, CTLFLAG_RW | CTLFLAG_LOCKED,
 641         &ip6_only_allow_rfc4193_prefix, 0, "");
 642
 643 /* net.inet6.icmp6 */
 644 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
 645         rediraccept, CTLFLAG_RW | CTLFLAG_LOCKED,       &icmp6_rediraccept,     0, "");
 646 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
 647         redirtimeout, CTLFLAG_RW | CTLFLAG_LOCKED,      &icmp6_redirtimeout,    0, "");
 648 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 649         &icmp6stat, icmp6stat, "");
 650 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
 651         nd6_prune, CTLFLAG_RW | CTLFLAG_LOCKED,         &nd6_prune,     0, "");
 652 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
 653         nd6_prune_lazy, CTLFLAG_RW | CTLFLAG_LOCKED,    &nd6_prune_lazy, 0, "");
 654 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
 655         nd6_delay, CTLFLAG_RW | CTLFLAG_LOCKED,         &nd6_delay,     0, "");
 656 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
 657         nd6_umaxtries, CTLFLAG_RW | CTLFLAG_LOCKED,     &nd6_umaxtries, 0, "");
 658 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
 659         nd6_mmaxtries, CTLFLAG_RW | CTLFLAG_LOCKED,     &nd6_mmaxtries, 0, "");
 660 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
 661         nd6_useloopback, CTLFLAG_RW | CTLFLAG_LOCKED,   &nd6_useloopback, 0, "");
 662 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ACCEPT_6TO4,
 663         nd6_accept_6to4, CTLFLAG_RW | CTLFLAG_LOCKED,   &nd6_accept_6to4, 0, "");
 664 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 665         nodeinfo, CTLFLAG_RW | CTLFLAG_LOCKED,  &icmp6_nodeinfo,        0, "");
 666 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 667         errppslimit, CTLFLAG_RW | CTLFLAG_LOCKED,       &icmp6errppslim,        0, "");
 668 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
 669         nd6_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_debug,             0, "");
 670 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
 671         nd6_onlink_ns_rfc4861, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_onlink_ns_rfc4861, 0,
 672         "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
 673 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_OPTIMISTIC_DAD,
 674         nd6_optimistic_dad, CTLFLAG_RW | CTLFLAG_LOCKED,        &nd6_optimistic_dad,            0, "");