sys/netinet6/in6_proto.c

   1 /*      $FreeBSD: src/sys/netinet6/in6_proto.c,v 1.6.2.9 2003/01/24 05:11:35 sam Exp $  */
   2 /*      $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $      */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)in_proto.c  8.1 (Berkeley) 6/10/93
  62  */
  63
  64 #include "opt_inet.h"
  65 #include "opt_inet6.h"
  66 #include "opt_ipsec.h"
  67 #include "opt_carp.h"
  68
  69 #include <sys/param.h>
  70 #include <sys/socket.h>
  71 #include <sys/socketvar.h>
  72 #include <sys/protosw.h>
  73 #include <sys/kernel.h>
  74 #include <sys/domain.h>
  75 #include <sys/mbuf.h>
  76 #include <sys/systm.h>
  77 #include <sys/sysctl.h>
  78
  79 #include <net/if.h>
  80 #include <net/radix.h>
  81 #include <net/route.h>
  82
  83 #include <netinet/in.h>
  84 #include <netinet/in_systm.h>
  85 #include <netinet/in_var.h>
  86 #include <netinet/ip_encap.h>
  87 #include <netinet/ip.h>
  88 #include <netinet/ip_var.h>
  89 #include <netinet/ip6.h>
  90 #include <netinet6/ip6_var.h>
  91 #include <netinet/icmp6.h>
  92
  93 #include <netinet/tcp.h>
  94 #include <netinet/tcp_timer.h>
  95 #include <netinet/tcp_var.h>
  96 #include <netinet/udp.h>
  97 #include <netinet/udp_var.h>
  98 #include <netinet6/tcp6_var.h>
  99 #include <netinet6/raw_ip6.h>
 100 #include <netinet6/udp6_var.h>
 101 #include <netinet6/pim6_var.h>
 102 #include <netinet6/nd6.h>
 103
 104 #ifdef IPSEC
 105 #include <netinet6/ipsec.h>
 106 #ifdef INET6
 107 #include <netinet6/ipsec6.h>
 108 #endif
 109 #include <netinet6/ah.h>
 110 #ifdef INET6
 111 #include <netinet6/ah6.h>
 112 #endif
 113 #ifdef IPSEC_ESP
 114 #include <netinet6/esp.h>
 115 #ifdef INET6
 116 #include <netinet6/esp6.h>
 117 #endif
 118 #endif
 119 #include <netinet6/ipcomp.h>
 120 #ifdef INET6
 121 #include <netinet6/ipcomp6.h>
 122 #endif
 123 #endif /* IPSEC */
 124
 125 #ifdef FAST_IPSEC
 126 #include <netproto/ipsec/ipsec6.h>
 127 #define IPSEC
 128 #define IPSEC_ESP
 129 #define ah6_input       ipsec6_common_input
 130 #define esp6_input      ipsec6_common_input
 131 #define ipcomp6_input   ipsec6_common_input
 132 #endif /* FAST_IPSEC */
 133
 134 #include <netinet6/ip6protosw.h>
 135
 136 #include <net/net_osdep.h>
 137
 138 #ifdef CARP
 139 #include <netinet/ip_carp.h>
 140 #endif
 141
 142
 143 /*
 144  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 145  */
 146
 147 extern  struct domain inet6domain;
 148 static struct pr_usrreqs nousrreqs;
 149
 150 #define PR_LISTEN       0
 151 #define PR_ABRTACPTDIS  0
 152
 153 struct protosw inet6sw[] = {
 154     {
 155         .pr_type = 0,
 156         .pr_domain = &inet6domain,
 157         .pr_protocol = IPPROTO_IPV6,
 158         .pr_flags = 0,
 159
 160         .pr_init = ip6_init,
 161         .pr_fasttimo = NULL,
 162         .pr_slowtimo = frag6_slowtimo,
 163         .pr_drain = frag6_drain,
 164         .pr_usrreqs = &nousrreqs
 165     },
 166     {
 167         .pr_type = SOCK_DGRAM,
 168         .pr_domain = &inet6domain,
 169         .pr_protocol = IPPROTO_UDP,
 170         .pr_flags = PR_ATOMIC | PR_ADDR | PR_MPSAFE | PR_LASTHDR,
 171
 172         .pr_input = udp6_input,
 173         .pr_output = 0,
 174         .pr_ctlinput = udp6_ctlinput,
 175         .pr_ctloutput = ip6_ctloutput_dispatch,
 176
 177         .pr_ctlport = cpu0_ctlport,
 178         .pr_usrreqs = &udp6_usrreqs
 179     },
 180     {
 181         .pr_type = SOCK_STREAM,
 182         .pr_domain = &inet6domain,
 183         .pr_protocol = IPPROTO_TCP,
 184         .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN |
 185                     PR_MPSAFE | PR_LASTHDR | PR_ASYNC_SEND | PR_ASYNC_RCVD,
 186
 187         .pr_input = tcp6_input,
 188         .pr_output = NULL,
 189         .pr_ctlinput = tcp6_ctlinput,
 190         .pr_ctloutput = tcp_ctloutput,
 191
 192         .pr_ctlport = cpu0_ctlport,
 193 #ifndef INET
 194         /* don't call initialization and timeout routines twice */
 195         .pr_init = tcp_init,
 196         .pr_slowtimo = NULL,
 197 #endif
 198         .pr_drain = tcp_drain,
 199         .pr_usrreqs = &tcp6_usrreqs
 200     },
 201     {
 202         .pr_type = SOCK_RAW,
 203         .pr_domain = &inet6domain,
 204         .pr_protocol = IPPROTO_RAW,
 205         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 206
 207         .pr_input = rip6_input,
 208         .pr_output = rip6_output,
 209         .pr_ctlinput = rip6_ctlinput,
 210         .pr_ctloutput = rip6_ctloutput,
 211
 212         .pr_ctlport = cpu0_ctlport,
 213         .pr_usrreqs = &rip6_usrreqs
 214     },
 215     {
 216         .pr_type = SOCK_RAW,
 217         .pr_domain = &inet6domain,
 218         .pr_protocol = IPPROTO_ICMPV6,
 219         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 220
 221         .pr_input = icmp6_input,
 222         .pr_output = rip6_output,
 223         .pr_ctlinput = rip6_ctlinput,
 224         .pr_ctloutput = rip6_ctloutput,
 225
 226         .pr_ctlport = cpu0_ctlport,
 227         .pr_init = icmp6_init,
 228         .pr_fasttimo = icmp6_fasttimo,
 229         .pr_slowtimo = NULL,
 230         .pr_drain = NULL,
 231
 232         .pr_usrreqs = &rip6_usrreqs
 233     },
 234     {
 235         .pr_type = SOCK_RAW,
 236         .pr_domain = &inet6domain,
 237         .pr_protocol = IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
 238
 239         .pr_input = dest6_input,
 240         .pr_output = NULL,
 241         .pr_ctlinput = NULL,
 242         .pr_ctloutput = NULL,
 243
 244         .pr_usrreqs = &nousrreqs
 245     },
 246     {
 247         .pr_type = SOCK_RAW,
 248         .pr_domain = &inet6domain,
 249         .pr_protocol = IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
 250
 251         .pr_input = route6_input,
 252         .pr_output = NULL,
 253         .pr_ctlinput = NULL,
 254         .pr_ctloutput = NULL,
 255
 256         .pr_usrreqs = &nousrreqs
 257     },
 258     {
 259         .pr_type = SOCK_RAW,
 260         .pr_domain = &inet6domain,
 261         .pr_protocol = IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
 262
 263         .pr_input = frag6_input,
 264         .pr_output = NULL,
 265         .pr_ctlinput = NULL,
 266         .pr_ctloutput = NULL,
 267
 268         .pr_usrreqs = &nousrreqs
 269     },
 270 #ifdef IPSEC
 271     {
 272         .pr_type = SOCK_RAW,
 273         .pr_domain = &inet6domain,
 274         .pr_protocol = IPPROTO_AH,
 275         .pr_flags = PR_ATOMIC|PR_ADDR,
 276
 277         .pr_input = ah6_input,
 278         .pr_output = NULL,
 279         .pr_ctlinput = NULL,
 280         .pr_ctloutput = NULL,
 281
 282         .pr_usrreqs = &nousrreqs
 283     },
 284 #ifdef IPSEC_ESP
 285     {
 286         .pr_type = SOCK_RAW,
 287         .pr_domain = &inet6domain,
 288         .pr_protocol = IPPROTO_ESP,
 289         .pr_flags = PR_ATOMIC|PR_ADDR,
 290
 291         .pr_input = esp6_input,
 292         .pr_output = NULL,
 293         .pr_ctlinput = esp6_ctlinput,
 294         .pr_ctloutput = NULL,
 295
 296         .pr_usrreqs = &nousrreqs
 297     },
 298 #endif
 299     {
 300         .pr_type = SOCK_RAW,
 301         .pr_domain = &inet6domain,
 302         .pr_protocol = IPPROTO_IPCOMP,
 303         .pr_flags = PR_ATOMIC|PR_ADDR,
 304
 305         .pr_input = ipcomp6_input,
 306         .pr_output = NULL,
 307         .pr_ctlinput = NULL,
 308         .pr_ctloutput = NULL,
 309
 310         .pr_usrreqs = &nousrreqs
 311     },
 312 #endif /* IPSEC */
 313 #ifdef INET
 314     {
 315         .pr_type = SOCK_RAW,
 316         .pr_domain = &inet6domain,
 317         .pr_protocol = IPPROTO_IPV4,
 318         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 319
 320         .pr_input = encap6_input,
 321         .pr_output = rip6_output,
 322         .pr_ctlinput = NULL,
 323         .pr_ctloutput = rip6_ctloutput,
 324
 325         .pr_init = encap_init,
 326         .pr_usrreqs = &rip6_usrreqs
 327     },
 328 #endif /* INET */
 329     {
 330         .pr_type = SOCK_RAW,
 331         .pr_domain = &inet6domain,
 332         .pr_protocol = IPPROTO_IPV6,
 333         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 334
 335         .pr_input = encap6_input,
 336         .pr_output = rip6_output,
 337         .pr_ctlinput = NULL,
 338         .pr_ctloutput = rip6_ctloutput,
 339
 340         .pr_init = encap_init,
 341         .pr_usrreqs = &rip6_usrreqs
 342     },
 343     {
 344         .pr_type = SOCK_RAW,
 345         .pr_domain = &inet6domain,
 346         .pr_protocol = IPPROTO_PIM,
 347         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 348
 349         .pr_input = pim6_input,
 350         .pr_output = rip6_output,
 351         .pr_ctlinput = NULL,
 352         .pr_ctloutput = rip6_ctloutput,
 353
 354         .pr_usrreqs = &rip6_usrreqs
 355     },
 356 #ifdef CARP
 357     {
 358         .pr_type = SOCK_RAW,
 359         .pr_domain = &inet6domain,
 360         .pr_protocol = IPPROTO_CARP,
 361         .pr_flags = PR_ATOMIC|PR_ADDR,
 362
 363         .pr_input = carp6_proto_input,
 364         .pr_output = rip6_output,
 365         .pr_ctlinput = NULL,
 366         .pr_ctloutput = rip6_ctloutput,
 367
 368         .pr_usrreqs = &rip6_usrreqs
 369     },
 370 #endif /* CARP */
 371
 372     /* raw wildcard */
 373     {
 374         .pr_type = SOCK_RAW,
 375         .pr_domain = &inet6domain,
 376         .pr_protocol = 0,
 377         .pr_flags = PR_ATOMIC|PR_ADDR,
 378
 379         .pr_input = rip6_input,
 380         .pr_output = rip6_output,
 381         .pr_ctlinput = NULL,
 382         .pr_ctloutput = rip6_ctloutput,
 383
 384         .pr_usrreqs = &rip6_usrreqs
 385     },
 386 };
 387
 388 extern int in6_inithead (void **, int);
 389
 390 struct domain inet6domain = {
 391         AF_INET6, "internet6", NULL, NULL, NULL,
 392         (struct protosw *)inet6sw,
 393         &inet6sw[NELEM(inet6sw)],
 394         SLIST_ENTRY_INITIALIZER,
 395         in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3,
 396         sizeof(struct sockaddr_in6), in6_domifattach, in6_domifdetach
 397 };
 398
 399 DOMAIN_SET(inet6);
 400
 401 /*
 402  * Internet configuration info
 403  */
 404 #ifndef IPV6FORWARDING
 405 #ifdef GATEWAY6
 406 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 407 #else
 408 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 409 #endif /* GATEWAY6 */
 410 #endif /* !IPV6FORWARDING */
 411
 412 #ifndef IPV6_SENDREDIRECTS
 413 #define IPV6_SENDREDIRECTS      1
 414 #endif
 415
 416 int     nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' NS/NA (as in RFC 4861) */
 417
 418 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 419 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 420 int     ip6_defhlim = IPV6_DEFHLIM;
 421 int     ip6_minhlim = IPV6_MINHLIM;
 422 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 423 int     ip6_accept_rtadv = 0;   /* "IPV6FORWARDING ? 0 : 1" is dangerous */
 424 int     ip6_maxfragpackets;     /* initialized in frag6.c:frag6_init() */
 425 int     ip6_maxfrags;           /* initialized in frag6.c:frag6_init() */
 426 int     ip6_log_interval = 5;
 427 int     ip6_hdrnestlimit = 50;  /* appropriate? */
 428 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 429 u_int32_t ip6_flow_seq;
 430 int     ip6_auto_flowlabel = 1;
 431 int     ip6_gif_hlim = 0;
 432 int     ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
 433 int     ip6_rr_prune = 5;       /* router renumbering prefix
 434                                  * walk list every 5 sec. */
 435
 436 u_int32_t ip6_id = 0UL;
 437 int     ip6_keepfaith = 0;
 438 time_t  ip6_log_time = (time_t)0L;
 439
 440 /* icmp6 */
 441 /*
 442  * BSDI4 defines these variables in in_proto.c...
 443  * XXX: what if we don't define INET? Should we define pmtu6_expire
 444  * or so? (jinmei@kame.net 19990310)
 445  */
 446 int pmtu_expire = 60*10;
 447 int pmtu_probe = 60*2;
 448
 449 /* raw IP6 parameters */
 450 /*
 451  * Nominal space allocated to a raw ip socket.
 452  */
 453 #define RIPV6SNDQ       8192
 454 #define RIPV6RCVQ       8192
 455
 456 u_long  rip6_sendspace = RIPV6SNDQ;
 457 u_long  rip6_recvspace = RIPV6RCVQ;
 458
 459 /* ICMPV6 parameters */
 460 int     icmp6_rediraccept = 1;          /* accept and process redirects */
 461 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 462 int     icmp6errppslim = 100;           /* 100pps */
 463 int     icmp6_nodeinfo = 3;             /* enable/disable NI response */
 464
 465 /* UDP on IP6 parameters */
 466 int     udp6_sendspace = 9216;          /* really max datagram size */
 467 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 468                                         /* 40 1K datagrams */
 469
 470 /*
 471  * sysctl related items.
 472  */
 473 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
 474         "Internet6 Family");
 475
 476 /* net.inet6 */
 477 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
 478 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
 479 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
 480 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
 481 #ifdef IPSEC
 482 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
 483 #endif /* IPSEC */
 484
 485 /* net.inet6.ip6 */
 486 static int
 487 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
 488 {
 489         int error = 0;
 490         int old;
 491
 492         error = SYSCTL_OUT(req, arg1, sizeof(int));
 493         if (error || !req->newptr)
 494                 return (error);
 495         old = ip6_temp_preferred_lifetime;
 496         error = SYSCTL_IN(req, arg1, sizeof(int));
 497         if (ip6_temp_preferred_lifetime <
 498             ip6_desync_factor + ip6_temp_regen_advance) {
 499                 ip6_temp_preferred_lifetime = old;
 500                 return (EINVAL);
 501         }
 502         return (error);
 503 }
 504
 505 static int
 506 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
 507 {
 508         int error = 0;
 509         int old;
 510
 511         error = SYSCTL_OUT(req, arg1, sizeof(int));
 512         if (error || !req->newptr)
 513                 return (error);
 514         old = ip6_temp_valid_lifetime;
 515         error = SYSCTL_IN(req, arg1, sizeof(int));
 516         if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 517                 ip6_temp_preferred_lifetime = old;
 518                 return (EINVAL);
 519         }
 520         return (error);
 521 }
 522
 523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
 524     &ip6_forwarding, 0, "Enable IP forwarding between interfaces");
 525 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
 526     &ip6_sendredirects, 0, "Enable sending IP redirects");
 527 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 528     hlim, CTLFLAG_RW, &ip6_defhlim, 0, "Default hop limit");
 529 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MINHLIM,
 530     minhlim, CTLFLAG_RW, &ip6_minhlim, 0, "Default hop limit");
 531 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
 532     &ip6stat, ip6stat, "IP stats");
 533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
 534     CTLFLAG_RW, &ip6_maxfragpackets, 0, "Maximum packets in reassembly queue");
 535 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
 536     CTLFLAG_RW, &ip6_accept_rtadv, 0, "Acts as a host not a router");
 537 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 538     keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0,
 539     "Enable packet capture for FAITH IPv4->IPv6 translator daemon");
 540 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 541         log_interval, CTLFLAG_RW,       &ip6_log_interval,      0, "");
 542 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, CTLFLAG_RW,
 543     &ip6_hdrnestlimit,  0, "Upper limit of # of extension headers");
 544 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
 545     &ip6_dad_count, 0, "Number of times to perform duplicate address detectione");
 546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, CTLFLAG_RW,
 547     &ip6_auto_flowlabel, 0, "Enable attaching flowlabel automatically");
 548 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, CTLFLAG_RW,
 549     &ip6_defmcasthlim, 0, "Default multicast hop limit");
 550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, gifhlim, CTLFLAG_RW,
 551     &ip6_gif_hlim,      0, "Hop limit for gif encap packet");
 552 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 553         kame_version, CTLFLAG_RD,       __KAME_VERSION,         0, "Kame version");
 554 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, CTLFLAG_RW,
 555     &ip6_use_deprecated, 0, "Allow deprecated addr as source");
 556 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 557         rr_prune, CTLFLAG_RW,   &ip6_rr_prune,  0,
 558     "Walk timer for router renumbering");
 559 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, CTLFLAG_RW,
 560     &ip6_use_tempaddr, 0, "Whether to use temporary addresses");
 561 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 562     CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
 563     sysctl_ip6_temppltime, "I",
 564     "Preferred lifetime for tmpaddrs");
 565 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 566     CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
 567     sysctl_ip6_tempvltime, "I",
 568     "Valid lifetime for tmpaddrs");
 569 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, CTLFLAG_RW,
 570     &ip6_auto_linklocal, 0, "Enable auto-assigning a link-local address");
 571 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
 572     &rip6stat, rip6stat, "Raw stats");
 573 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW,
 574     &ip6_maxfrags, 0, "Maximum fragments in reassembly queues");
 575
 576 /* net.inet6.icmp6 */
 577 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, CTLFLAG_RW,
 578     &icmp6_rediraccept, 0, "If enabled, accept and process redirects");
 579 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, CTLFLAG_RW,
 580     &icmp6_redirtimeout, 0, "Cache time for redirect routes");
 581 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
 582     &icmp6stat, icmp6stat, "Stats");
 583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
 584     &nd6_prune, 0, "Prune interval");
 585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
 586     &nd6_delay, 0, "Reachability timeout for stale neighbors");
 587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, CTLFLAG_RW,
 588     &nd6_umaxtries,     0, "Maximum unicast query");
 589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, CTLFLAG_RW,
 590     &nd6_mmaxtries, 0, "Maximum multicast query");
 591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, CTLFLAG_RW,
 592     &nd6_useloopback, 0, "Use loopback interface for local traffic");
 593 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 594     nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "Enable/disable NI response");
 595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 596         errppslimit, CTLFLAG_RW,        &icmp6errppslim,        0,
 597     "ICMPv6 error maximum packet-per-second value (default: 100pps)");
 598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, CTLFLAG_RW,
 599     &nd6_maxnudhint, 0, "Max # of subsequent upper layer hints");
 600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
 601     &nd6_debug, 0, "Enable debug output");
 602 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, nd6_onlink_ns_rfc4861, CTLFLAG_RW,
 603     &nd6_onlink_ns_rfc4861, 0, "Accept 'on-link' NS/NA in compliance with RFC 4861.");