bsd/netinet6/in6_proto.c

   1 /*
   2  * Copyright (c) 2008-2019 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*
  30  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  31  * All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. Neither the name of the project nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 /*
  59  * Copyright (c) 1982, 1986, 1993
  60  *      The Regents of the University of California.  All rights reserved.
  61  *
  62  * Redistribution and use in source and binary forms, with or without
  63  * modification, are permitted provided that the following conditions
  64  * are met:
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  * 2. Redistributions in binary form must reproduce the above copyright
  68  *    notice, this list of conditions and the following disclaimer in the
  69  *    documentation and/or other materials provided with the distribution.
  70  * 3. All advertising materials mentioning features or use of this software
  71  *    must display the following acknowledgement:
  72  *      This product includes software developed by the University of
  73  *      California, Berkeley and its contributors.
  74  * 4. Neither the name of the University nor the names of its contributors
  75  *    may be used to endorse or promote products derived from this software
  76  *    without specific prior written permission.
  77  *
  78  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  79  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  80  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  81  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  82  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  83  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  84  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  85  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  86  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  87  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  88  * SUCH DAMAGE.
  89  *
  90  *      @(#)in_proto.c  8.1 (Berkeley) 6/10/93
  91  */
  92
  93
  94 #include <sys/param.h>
  95 #include <sys/socket.h>
  96 #include <sys/socketvar.h>
  97 #include <sys/protosw.h>
  98 #include <sys/kernel.h>
  99 #include <sys/domain.h>
 100 #include <sys/mbuf.h>
 101 #include <sys/systm.h>
 102 #include <sys/sysctl.h>
 103
 104 #include <net/if.h>
 105 #include <net/radix.h>
 106 #include <net/route.h>
 107 #include <net/nat464_utils.h>
 108
 109 #include <netinet/in.h>
 110 #include <netinet/in_systm.h>
 111 #include <netinet/in_var.h>
 112 #include <netinet/ip_encap.h>
 113 #include <netinet/ip.h>
 114 #include <netinet/ip_var.h>
 115 #include <netinet/ip6.h>
 116 #include <netinet6/ip6_var.h>
 117 #include <netinet6/in6_var.h>
 118 #include <netinet/icmp6.h>
 119
 120 #include <netinet/tcp.h>
 121 #include <netinet/tcp_timer.h>
 122 #include <netinet/tcp_var.h>
 123 #include <netinet/udp.h>
 124 #include <netinet/udp_var.h>
 125 #include <netinet6/tcp6_var.h>
 126 #include <netinet6/raw_ip6.h>
 127 #include <netinet6/udp6_var.h>
 128 #include <netinet6/nd6.h>
 129 #include <netinet6/mld6_var.h>
 130
 131 #if IPSEC
 132 #include <netinet6/ipsec.h>
 133 #if INET6
 134 #include <netinet6/ipsec6.h>
 135 #endif
 136 #include <netinet6/ah.h>
 137 #if INET6
 138 #include <netinet6/ah6.h>
 139 #endif
 140 #if IPSEC_ESP
 141 #include <netinet6/esp.h>
 142 #if INET6
 143 #include <netinet6/esp6.h>
 144 #endif
 145 #endif
 146 #endif /*IPSEC*/
 147
 148 #include <netinet6/ip6protosw.h>
 149
 150 #include <net/net_osdep.h>
 151
 152 /*
 153  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 154  */
 155
 156 extern struct domain inet6domain_s;
 157 struct domain *inet6domain = NULL;
 158
 159 static struct pr_usrreqs nousrreqs;
 160 lck_mtx_t *inet6_domain_mutex;
 161
 162 static void in6_dinit(struct domain *);
 163 static int rip6_pr_output(struct mbuf *, struct socket *,
 164     struct sockaddr_in6 *, struct mbuf *);
 165
 166 struct ip6protosw inet6sw[] = {
 167         {
 168                 .pr_type =              0,
 169                 .pr_protocol =          IPPROTO_IPV6,
 170                 .pr_init =              ip6_init,
 171                 .pr_drain =             ip6_drain,
 172                 .pr_usrreqs =           &nousrreqs,
 173         },
 174         {
 175                 .pr_type =              SOCK_DGRAM,
 176                 .pr_protocol =          IPPROTO_UDP,
 177                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_PROTOLOCK | PR_PCBLOCK |
 178     PR_EVCONNINFO | PR_PRECONN_WRITE,
 179                 .pr_input =             udp6_input,
 180                 .pr_ctlinput =          udp6_ctlinput,
 181                 .pr_ctloutput =         ip6_ctloutput,
 182 #if !INET       /* don't call initialization twice */
 183                 .pr_init =              udp_init,
 184 #endif /* !INET */
 185                 .pr_usrreqs =           &udp6_usrreqs,
 186                 .pr_lock =              udp_lock,
 187                 .pr_unlock =            udp_unlock,
 188                 .pr_getlock =           udp_getlock,
 189                 .pr_update_last_owner = inp_update_last_owner,
 190                 .pr_copy_last_owner =   inp_copy_last_owner,
 191         },
 192         {
 193                 .pr_type =              SOCK_STREAM,
 194                 .pr_protocol =          IPPROTO_TCP,
 195                 .pr_flags =             PR_CONNREQUIRED | PR_WANTRCVD | PR_PCBLOCK |
 196     PR_PROTOLOCK | PR_DISPOSE | PR_EVCONNINFO |
 197     PR_PRECONN_WRITE | PR_DATA_IDEMPOTENT,
 198                 .pr_input =             tcp6_input,
 199                 .pr_ctlinput =          tcp6_ctlinput,
 200                 .pr_ctloutput =         tcp_ctloutput,
 201 #if !INET       /* don't call initialization and timeout routines twice */
 202                 .pr_init =              tcp_init,
 203 #endif /* !INET */
 204                 .pr_drain =             tcp_drain,
 205                 .pr_usrreqs =           &tcp6_usrreqs,
 206                 .pr_lock =              tcp_lock,
 207                 .pr_unlock =            tcp_unlock,
 208                 .pr_getlock =           tcp_getlock,
 209                 .pr_update_last_owner = inp_update_last_owner,
 210                 .pr_copy_last_owner =   inp_copy_last_owner,
 211         },
 212         {
 213                 .pr_type =              SOCK_RAW,
 214                 .pr_protocol =          IPPROTO_RAW,
 215                 .pr_flags =             PR_ATOMIC | PR_ADDR,
 216                 .pr_input =             rip6_input,
 217                 .pr_output =            rip6_pr_output,
 218                 .pr_ctlinput =          rip6_ctlinput,
 219                 .pr_ctloutput =         rip6_ctloutput,
 220 #if !INET       /* don't call initialization and timeout routines twice */
 221                 .pr_init =              rip_init,
 222 #endif /* !INET */
 223                 .pr_usrreqs =           &rip6_usrreqs,
 224                 .pr_unlock =            rip_unlock,
 225                 .pr_update_last_owner = inp_update_last_owner,
 226                 .pr_copy_last_owner =   inp_copy_last_owner,
 227         },
 228         {
 229                 .pr_type =              SOCK_RAW,
 230                 .pr_protocol =          IPPROTO_ICMPV6,
 231                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_LASTHDR,
 232                 .pr_input =             icmp6_input,
 233                 .pr_output =            rip6_pr_output,
 234                 .pr_ctlinput =          rip6_ctlinput,
 235                 .pr_ctloutput =         rip6_ctloutput,
 236                 .pr_init =              icmp6_init,
 237                 .pr_usrreqs =           &rip6_usrreqs,
 238                 .pr_unlock =            rip_unlock,
 239                 .pr_update_last_owner = inp_update_last_owner,
 240                 .pr_copy_last_owner =   inp_copy_last_owner,
 241         },
 242         {
 243                 .pr_type =              SOCK_DGRAM,
 244                 .pr_protocol =          IPPROTO_ICMPV6,
 245                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_LASTHDR,
 246                 .pr_input =             icmp6_input,
 247                 .pr_output =            rip6_pr_output,
 248                 .pr_ctlinput =          rip6_ctlinput,
 249                 .pr_ctloutput =         icmp6_dgram_ctloutput,
 250                 .pr_init =              icmp6_init,
 251                 .pr_usrreqs =           &icmp6_dgram_usrreqs,
 252                 .pr_unlock =            rip_unlock,
 253                 .pr_update_last_owner = inp_update_last_owner,
 254                 .pr_copy_last_owner =   inp_copy_last_owner,
 255         },
 256         {
 257                 .pr_type =              SOCK_RAW,
 258                 .pr_protocol =          IPPROTO_DSTOPTS,
 259                 .pr_flags =             PR_ATOMIC | PR_ADDR,
 260                 .pr_input =             dest6_input,
 261                 .pr_usrreqs =           &nousrreqs,
 262         },
 263         {
 264                 .pr_type =              SOCK_RAW,
 265                 .pr_protocol =          IPPROTO_ROUTING,
 266                 .pr_flags =             PR_ATOMIC | PR_ADDR,
 267                 .pr_input =             route6_input,
 268                 .pr_usrreqs =           &nousrreqs,
 269         },
 270         {
 271                 .pr_type =              SOCK_RAW,
 272                 .pr_protocol =          IPPROTO_FRAGMENT,
 273                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
 274                 .pr_input =             frag6_input,
 275                 .pr_usrreqs =           &nousrreqs,
 276         },
 277 #if IPSEC
 278         {
 279                 .pr_type =              SOCK_RAW,
 280                 .pr_protocol =          IPPROTO_AH,
 281                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
 282                 .pr_input =             ah6_input,
 283                 .pr_usrreqs =           &nousrreqs,
 284         },
 285 #if IPSEC_ESP
 286         {
 287                 .pr_type =              SOCK_RAW,
 288                 .pr_protocol =          IPPROTO_ESP,
 289                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
 290                 .pr_input =             esp6_input,
 291                 .pr_ctlinput =          esp6_ctlinput,
 292                 .pr_usrreqs =           &nousrreqs,
 293         },
 294 #endif /* IPSEC_ESP */
 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                 .pr_update_last_owner = inp_update_last_owner,
 308                 .pr_copy_last_owner =   inp_copy_last_owner,
 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                 .pr_update_last_owner = inp_update_last_owner,
 322                 .pr_copy_last_owner =   inp_copy_last_owner,
 323         },
 324 /* raw wildcard */
 325         {
 326                 .pr_type =              SOCK_RAW,
 327                 .pr_protocol =          0,
 328                 .pr_flags =             PR_ATOMIC | PR_ADDR | PR_LASTHDR,
 329                 .pr_input =             rip6_input,
 330                 .pr_output =            rip6_pr_output,
 331                 .pr_ctloutput =         rip6_ctloutput,
 332                 .pr_usrreqs =           &rip6_usrreqs,
 333                 .pr_unlock =            rip_unlock,
 334                 .pr_update_last_owner = inp_update_last_owner,
 335                 .pr_copy_last_owner =   inp_copy_last_owner,
 336         },
 337 };
 338
 339 int in6_proto_count = (sizeof(inet6sw) / sizeof(struct ip6protosw));
 340
 341 struct domain inet6domain_s = {
 342         .dom_family =           PF_INET6,
 343         .dom_flags =            DOM_REENTRANT,
 344         .dom_name =             "internet6",
 345         .dom_init =             in6_dinit,
 346         .dom_rtattach =         in6_inithead,
 347         .dom_rtoffset =         offsetof(struct sockaddr_in6, sin6_addr) << 3,
 348                 .dom_maxrtkey =         sizeof(struct sockaddr_in6),
 349                 .dom_protohdrlen =      sizeof(struct sockaddr_in6),
 350 };
 351
 352 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
 353 void
 354 in6_dinit(struct domain *dp)
 355 {
 356         struct ip6protosw *pr;
 357         int i;
 358
 359         VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
 360         VERIFY(inet6domain == NULL);
 361
 362         inet6domain = dp;
 363
 364         _CASSERT(sizeof(struct protosw) == sizeof(struct ip6protosw));
 365         _CASSERT(offsetof(struct ip6protosw, pr_entry) ==
 366             offsetof(struct protosw, pr_entry));
 367         _CASSERT(offsetof(struct ip6protosw, pr_domain) ==
 368             offsetof(struct protosw, pr_domain));
 369         _CASSERT(offsetof(struct ip6protosw, pr_protosw) ==
 370             offsetof(struct protosw, pr_protosw));
 371         _CASSERT(offsetof(struct ip6protosw, pr_type) ==
 372             offsetof(struct protosw, pr_type));
 373         _CASSERT(offsetof(struct ip6protosw, pr_protocol) ==
 374             offsetof(struct protosw, pr_protocol));
 375         _CASSERT(offsetof(struct ip6protosw, pr_flags) ==
 376             offsetof(struct protosw, pr_flags));
 377         _CASSERT(offsetof(struct ip6protosw, pr_input) ==
 378             offsetof(struct protosw, pr_input));
 379         _CASSERT(offsetof(struct ip6protosw, pr_output) ==
 380             offsetof(struct protosw, pr_output));
 381         _CASSERT(offsetof(struct ip6protosw, pr_ctlinput) ==
 382             offsetof(struct protosw, pr_ctlinput));
 383         _CASSERT(offsetof(struct ip6protosw, pr_ctloutput) ==
 384             offsetof(struct protosw, pr_ctloutput));
 385         _CASSERT(offsetof(struct ip6protosw, pr_usrreqs) ==
 386             offsetof(struct protosw, pr_usrreqs));
 387         _CASSERT(offsetof(struct ip6protosw, pr_init) ==
 388             offsetof(struct protosw, pr_init));
 389         _CASSERT(offsetof(struct ip6protosw, pr_drain) ==
 390             offsetof(struct protosw, pr_drain));
 391         _CASSERT(offsetof(struct ip6protosw, pr_sysctl) ==
 392             offsetof(struct protosw, pr_sysctl));
 393         _CASSERT(offsetof(struct ip6protosw, pr_lock) ==
 394             offsetof(struct protosw, pr_lock));
 395         _CASSERT(offsetof(struct ip6protosw, pr_unlock) ==
 396             offsetof(struct protosw, pr_unlock));
 397         _CASSERT(offsetof(struct ip6protosw, pr_getlock) ==
 398             offsetof(struct protosw, pr_getlock));
 399         _CASSERT(offsetof(struct ip6protosw, pr_filter_head) ==
 400             offsetof(struct protosw, pr_filter_head));
 401         _CASSERT(offsetof(struct ip6protosw, pr_old) ==
 402             offsetof(struct protosw, pr_old));
 403         _CASSERT(offsetof(struct ip6protosw, pr_update_last_owner) ==
 404             offsetof(struct protosw, pr_update_last_owner));
 405         _CASSERT(offsetof(struct ip6protosw, pr_copy_last_owner) ==
 406             offsetof(struct protosw, pr_copy_last_owner));
 407
 408         /*
 409          * Attach first, then initialize.  ip6_init() needs raw IP6 handler.
 410          */
 411         for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
 412                 net_add_proto((struct protosw *)pr, dp, 0);
 413         }
 414         for (i = 0, pr = &inet6sw[0]; i < in6_proto_count; i++, pr++) {
 415                 net_init_proto((struct protosw *)pr, dp);
 416         }
 417
 418         inet6_domain_mutex = dp->dom_mtx;
 419 }
 420
 421 static int
 422 rip6_pr_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *sin6,
 423     struct mbuf *m1)
 424 {
 425 #pragma unused(m, so, sin6, m1)
 426         panic("%s\n", __func__);
 427         /* NOTREACHED */
 428         return 0;
 429 }
 430
 431 /*
 432  * Internet configuration info
 433  */
 434 #ifndef IPV6FORWARDING
 435 #if GATEWAY6
 436 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 437 #else
 438 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 439 #endif /* GATEWAY6 */
 440 #endif /* !IPV6FORWARDING */
 441
 442 #ifndef IPV6_SENDREDIRECTS
 443 #define IPV6_SENDREDIRECTS      1
 444 #endif
 445
 446 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 447 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 448 int     ip6_defhlim = IPV6_DEFHLIM;
 449 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 450 int     ip6_accept_rtadv = 1;   /* deprecated */
 451 int     ip6_log_interval = 5;
 452 int     ip6_hdrnestlimit = 15;  /* How many header options will we process? */
 453 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 454 int     ip6_auto_flowlabel = 1;
 455 int     ip6_gif_hlim = 0;
 456 int     ip6_use_deprecated = 1; /* allow deprecated addr [RFC 4862, 5.5.4] */
 457 int     ip6_rr_prune = 5;       /* router renumbering prefix
 458                                  * walk list every 5 sec.    */
 459 int     ip6_mcast_pmtu = 0;     /* enable pMTU discovery for multicast? */
 460 int     ip6_v6only = 0;         /* Mapped addresses off by default -  Radar 3347718  -- REVISITING FOR 10.7 -- TESTING WITH MAPPED@ OFF */
 461
 462 int     ip6_neighborgcthresh = 1024;    /* Threshold # of NDP entries for GC */
 463 int     ip6_maxifprefixes = 16;         /* Max acceptable prefixes via RA per IF */
 464 int     ip6_maxifdefrouters = 16;       /* Max acceptable def routers via RA */
 465 int     ip6_maxdynroutes = 1024;        /* Max # of routes created via redirect */
 466 int     ip6_only_allow_rfc4193_prefix = 0;      /* Only allow RFC4193 style Unique Local IPv6 Unicast prefixes */
 467
 468 static int ip6_keepfaith = 0;
 469 uint64_t ip6_log_time = 0;
 470 int     nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' nd6 NS (as in RFC 4861) */
 471
 472 /* icmp6 */
 473 /*
 474  * BSDI4 defines these variables in in_proto.c...
 475  * XXX: what if we don't define INET? Should we define pmtu6_expire
 476  * or so? (jinmei@kame.net 19990310)
 477  */
 478 int pmtu_expire = 60 * 10;
 479 int pmtu_probe = 60 * 2;
 480
 481 /* raw IP6 parameters */
 482 /*
 483  * Nominal space allocated to a raw ip socket.
 484  */
 485 #define RIPV6SNDQ       8192
 486 #define RIPV6RCVQ       8192
 487
 488 u_int32_t       rip6_sendspace = RIPV6SNDQ;
 489 u_int32_t       rip6_recvspace = RIPV6RCVQ;
 490
 491 /* ICMPV6 parameters */
 492 int     icmp6_rediraccept = 1;          /* accept and process redirects */
 493 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 494 int     icmp6errppslim = 500;           /* 500 packets per second */
 495 int     icmp6rappslim = 10;             /* 10 packets per second */
 496 int     icmp6_nodeinfo = 3;             /* enable/disable NI response */
 497
 498 /* UDP on IP6 parameters */
 499 int     udp6_sendspace = 9216;          /* really max datagram size */
 500 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 501 /* 40 1K datagrams */
 502
 503 /*
 504  * sysctl related items.
 505  */
 506 SYSCTL_NODE(_net, PF_INET6, inet6,
 507     CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet6 Family");
 508
 509 /* net.inet6 */
 510 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6,
 511     CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IP6");
 512 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,
 513     CTLFLAG_RW | CTLFLAG_LOCKED, 0, "ICMP6");
 514 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6,
 515     CTLFLAG_RW | CTLFLAG_LOCKED, 0, "UDP6");
 516 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6,
 517     CTLFLAG_RW | CTLFLAG_LOCKED, 0, "TCP6");
 518 #if IPSEC
 519 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6,
 520     CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IPSEC6");
 521 #endif /* IPSEC */
 522
 523 /* net.inet6.ip6 */
 524 static int
 525 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
 526 {
 527 #pragma unused(oidp, arg2)
 528         int error = 0;
 529         int old;
 530
 531         error = SYSCTL_OUT(req, arg1, sizeof(int));
 532         if (error || !req->newptr) {
 533                 return error;
 534         }
 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         }
 557         old = ip6_temp_valid_lifetime;
 558         error = SYSCTL_IN(req, arg1, sizeof(int));
 559         if (ip6_temp_valid_lifetime > ND6_MAX_LIFETIME ||
 560             ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 561                 ip6_temp_valid_lifetime = old;
 562                 return EINVAL;
 563         }
 564         return error;
 565 }
 566
 567 static int
 568 ip6_getstat SYSCTL_HANDLER_ARGS
 569 {
 570 #pragma unused(oidp, arg1, arg2)
 571         if (req->oldptr == USER_ADDR_NULL) {
 572                 req->oldlen = (size_t)sizeof(struct ip6stat);
 573         }
 574
 575         return SYSCTL_OUT(req, &ip6stat, MIN(sizeof(ip6stat), req->oldlen));
 576 }
 577
 578 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
 579     forwarding, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_forwarding, 0, "");
 580 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
 581     redirect, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_sendredirects, 0, "");
 582 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 583     hlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defhlim, 0, "");
 584 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_STATS, stats,
 585     CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
 586     0, 0, ip6_getstat, "S,ip6stat", "");
 587
 588 #if (DEVELOPMENT || DEBUG)
 589 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
 590     accept_rtadv, CTLFLAG_RW | CTLFLAG_LOCKED,
 591     &ip6_accept_rtadv, 0, "");
 592 #else
 593 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
 594     accept_rtadv, CTLFLAG_RD | CTLFLAG_LOCKED,
 595     &ip6_accept_rtadv, 0, "");
 596 #endif /* (DEVELOPMENT || DEBUG) */
 597 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 598     keepfaith, CTLFLAG_RD | CTLFLAG_LOCKED, &ip6_keepfaith, 0, "");
 599 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 600     log_interval, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_log_interval, 0, "");
 601 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
 602     hdrnestlimit, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_hdrnestlimit, 0, "");
 603 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
 604     dad_count, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_dad_count, 0, "");
 605 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
 606     auto_flowlabel, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_flowlabel, 0, "");
 607 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
 608     defmcasthlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_defmcasthlim, 0, "");
 609 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
 610     gifhlim, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_gif_hlim, 0, "");
 611 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 612     kame_version, CTLFLAG_RD | CTLFLAG_LOCKED, (void *)((uintptr_t)(__KAME_VERSION)), 0, "");
 613 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
 614     use_deprecated, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_deprecated, 0, "");
 615 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 616     rr_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_rr_prune, 0, "");
 617 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
 618     use_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_tempaddr, 0, "");
 619 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 620     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_preferred_lifetime, 0,
 621     sysctl_ip6_temppltime, "I", "");
 622 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 623     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_temp_valid_lifetime, 0,
 624     sysctl_ip6_tempvltime, "I", "");
 625 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
 626     v6only, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_v6only, 0, "");
 627 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
 628     auto_linklocal, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_auto_linklocal, 0, "");
 629 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 630     &rip6stat, rip6stat, "");
 631 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR,
 632     prefer_tempaddr, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_prefer_tempaddr, 0, "");
 633 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE,
 634     use_defaultzone, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_use_defzone, 0, "");
 635 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU,
 636     mcast_pmtu, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_mcast_pmtu, 0, "");
 637 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NEIGHBORGCTHRESH,
 638     neighborgcthresh, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_neighborgcthresh, 0, "");
 639 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFPREFIXES,
 640     maxifprefixes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifprefixes, 0, "");
 641 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXIFDEFROUTERS,
 642     maxifdefrouters, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxifdefrouters, 0, "");
 643 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXDYNROUTES,
 644     maxdynroutes, CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_maxdynroutes, 0, "");
 645 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
 646     only_allow_rfc4193_prefixes, CTLFLAG_RW | CTLFLAG_LOCKED,
 647     &ip6_only_allow_rfc4193_prefix, 0, "");
 648 SYSCTL_INT(_net_inet6_ip6, OID_AUTO,
 649     clat_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &clat_debug, 0, "");
 650
 651 /* net.inet6.icmp6 */
 652 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
 653     rediraccept, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_rediraccept, 0, "");
 654 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
 655     redirtimeout, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_redirtimeout, 0, "");
 656 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
 657     &icmp6stat, icmp6stat, "");
 658 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
 659     nd6_prune, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune, 0, "");
 660 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
 661     nd6_prune_lazy, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_prune_lazy, 0, "");
 662 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
 663     nd6_delay, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_delay, 0, "");
 664 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
 665     nd6_umaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_umaxtries, 0, "");
 666 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
 667     nd6_mmaxtries, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_mmaxtries, 0, "");
 668 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
 669     nd6_useloopback, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_useloopback, 0, "");
 670 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ACCEPT_6TO4,
 671     nd6_accept_6to4, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_accept_6to4, 0, "");
 672 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 673     nodeinfo, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6_nodeinfo, 0, "");
 674 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 675     errppslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6errppslim, 0, "");
 676 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO,
 677     rappslimit, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp6rappslim, 0, "");
 678 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
 679     nd6_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_debug, 0, "");
 680 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
 681     nd6_onlink_ns_rfc4861, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_onlink_ns_rfc4861, 0,
 682     "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
 683 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_OPTIMISTIC_DAD,
 684     nd6_optimistic_dad, CTLFLAG_RW | CTLFLAG_LOCKED, &nd6_optimistic_dad, 0, "");