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 /*      $DragonFly: src/sys/netinet6/in6_proto.c,v 1.14 2008/10/27 02:56:30 sephe Exp $ */
   3 /*      $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $      */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1982, 1986, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)in_proto.c  8.1 (Berkeley) 6/10/93
  67  */
  68
  69 #include "opt_inet.h"
  70 #include "opt_inet6.h"
  71 #include "opt_ipsec.h"
  72 #include "opt_carp.h"
  73
  74 #include <sys/param.h>
  75 #include <sys/socket.h>
  76 #include <sys/socketvar.h>
  77 #include <sys/protosw.h>
  78 #include <sys/kernel.h>
  79 #include <sys/domain.h>
  80 #include <sys/mbuf.h>
  81 #include <sys/systm.h>
  82 #include <sys/sysctl.h>
  83
  84 #include <net/if.h>
  85 #include <net/radix.h>
  86 #include <net/route.h>
  87
  88 #include <netinet/in.h>
  89 #include <netinet/in_systm.h>
  90 #include <netinet/in_var.h>
  91 #include <netinet/ip_encap.h>
  92 #include <netinet/ip.h>
  93 #include <netinet/ip_var.h>
  94 #include <netinet/ip6.h>
  95 #include <netinet6/ip6_var.h>
  96 #include <netinet/icmp6.h>
  97
  98 #include <netinet/tcp.h>
  99 #include <netinet/tcp_timer.h>
 100 #include <netinet/tcp_var.h>
 101 #include <netinet/udp.h>
 102 #include <netinet/udp_var.h>
 103 #include <netinet6/tcp6_var.h>
 104 #include <netinet6/raw_ip6.h>
 105 #include <netinet6/udp6_var.h>
 106 #include <netinet6/pim6_var.h>
 107 #include <netinet6/nd6.h>
 108 #include <netinet6/in6_prefix.h>
 109
 110 #ifdef IPSEC
 111 #include <netinet6/ipsec.h>
 112 #ifdef INET6
 113 #include <netinet6/ipsec6.h>
 114 #endif
 115 #include <netinet6/ah.h>
 116 #ifdef INET6
 117 #include <netinet6/ah6.h>
 118 #endif
 119 #ifdef IPSEC_ESP
 120 #include <netinet6/esp.h>
 121 #ifdef INET6
 122 #include <netinet6/esp6.h>
 123 #endif
 124 #endif
 125 #include <netinet6/ipcomp.h>
 126 #ifdef INET6
 127 #include <netinet6/ipcomp6.h>
 128 #endif
 129 #endif /* IPSEC */
 130
 131 #ifdef FAST_IPSEC
 132 #include <netproto/ipsec/ipsec6.h>
 133 #define IPSEC
 134 #define IPSEC_ESP
 135 #define ah6_input       ipsec6_common_input
 136 #define esp6_input      ipsec6_common_input
 137 #define ipcomp6_input   ipsec6_common_input
 138 #endif /* FAST_IPSEC */
 139
 140 #include <netinet6/ip6protosw.h>
 141
 142 #include <net/net_osdep.h>
 143
 144 #ifdef CARP
 145 #include <netinet/ip_carp.h>
 146 #endif
 147
 148
 149 /*
 150  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 151  */
 152
 153 extern  struct domain inet6domain;
 154 static struct pr_usrreqs nousrreqs;
 155
 156 #define PR_LISTEN       0
 157 #define PR_ABRTACPTDIS  0
 158
 159 struct ip6protosw inet6sw[] = {
 160 { 0,            &inet6domain,   IPPROTO_IPV6,   0,
 161   0,            0,              0,              0,
 162   cpu0_soport,  NULL,
 163   ip6_init,     0,              frag6_slowtimo, frag6_drain,
 164   &nousrreqs,
 165 },
 166 { SOCK_DGRAM,   &inet6domain,   IPPROTO_UDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 167   udp6_input,   0,              udp6_ctlinput,  ip6_ctloutput,
 168   cpu0_soport,  cpu0_ctlport,
 169   0,            0,              0,              0,
 170   &udp6_usrreqs,
 171 },
 172 { SOCK_STREAM,  &inet6domain,   IPPROTO_TCP,    PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR,
 173   tcp6_input,   0,              tcp6_ctlinput,  tcp_ctloutput,
 174   tcp6_soport,  cpu0_ctlport,
 175 #ifdef INET     /* don't call initialization and timeout routines twice */
 176   0,            0,              0,              tcp_drain,
 177 #else
 178   tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
 179 #endif
 180   &tcp6_usrreqs,
 181 },
 182 { SOCK_RAW,     &inet6domain,   IPPROTO_RAW,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 183   rip6_input,   rip6_output,    rip6_ctlinput,  rip6_ctloutput,
 184   cpu0_soport,  cpu0_ctlport,
 185   0,            0,              0,              0,
 186   &rip6_usrreqs
 187 },
 188 { SOCK_RAW,     &inet6domain,   IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 189   icmp6_input,  rip6_output,    rip6_ctlinput,  rip6_ctloutput,
 190   cpu0_soport,  cpu0_ctlport,
 191   icmp6_init,   icmp6_fasttimo, 0,              0,
 192   &rip6_usrreqs
 193 },
 194 { SOCK_RAW,     &inet6domain,   IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
 195   dest6_input,  0,              0,              0,
 196   cpu0_soport,  NULL,
 197   0,            0,              0,              0,
 198   &nousrreqs
 199 },
 200 { SOCK_RAW,     &inet6domain,   IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
 201   route6_input, 0,              0,              0,
 202   cpu0_soport,  NULL,
 203   0,            0,              0,              0,
 204   &nousrreqs
 205 },
 206 { SOCK_RAW,     &inet6domain,   IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
 207   frag6_input,  0,              0,              0,
 208   cpu0_soport,  NULL,
 209   0,            0,              0,              0,
 210   &nousrreqs
 211 },
 212 #ifdef IPSEC
 213 { SOCK_RAW,     &inet6domain,   IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 214   ah6_input,    0,              0,              0,
 215   cpu0_soport,  NULL,
 216   0,            0,              0,              0,
 217   &nousrreqs,
 218 },
 219 #ifdef IPSEC_ESP
 220 { SOCK_RAW,     &inet6domain,   IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 221   esp6_input,   0,
 222   esp6_ctlinput,
 223   0,
 224   cpu0_soport,  NULL,
 225   0,            0,              0,              0,
 226   &nousrreqs,
 227 },
 228 #endif
 229 { SOCK_RAW,     &inet6domain,   IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 230   ipcomp6_input, 0,             0,              0,
 231   cpu0_soport,  NULL,
 232   0,            0,              0,              0,
 233   &nousrreqs,
 234 },
 235 #endif /* IPSEC */
 236 #ifdef INET
 237 { SOCK_RAW,     &inet6domain,   IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 238   encap6_input, rip6_output,    0,              rip6_ctloutput,
 239   cpu0_soport,  NULL,
 240   encap_init,   0,              0,              0,
 241   &rip6_usrreqs
 242 },
 243 #endif /* INET */
 244 { SOCK_RAW,     &inet6domain,   IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 245   encap6_input, rip6_output,    0,              rip6_ctloutput,
 246   cpu0_soport,  NULL,
 247   encap_init,   0,              0,              0,
 248   &rip6_usrreqs
 249 },
 250 { SOCK_RAW,     &inet6domain,   IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 251   pim6_input,   rip6_output,    0,              rip6_ctloutput,
 252   cpu0_soport,  NULL,
 253   0,            0,              0,              0,
 254   &rip6_usrreqs
 255 },
 256 #ifdef CARP
 257 { SOCK_RAW,     &inet6domain,   IPPROTO_CARP,   PR_ATOMIC|PR_ADDR,
 258   carp6_input,  rip6_output,    0,              rip6_ctloutput,
 259   cpu0_soport,  NULL,
 260   0,            0,              0,              0,
 261   &rip6_usrreqs
 262 },
 263 #endif /* CARP */
 264
 265 /* raw wildcard */
 266 { SOCK_RAW,     &inet6domain,   0,              PR_ATOMIC|PR_ADDR,
 267   rip6_input,   rip6_output,    0,              rip6_ctloutput,
 268   cpu0_soport,  NULL,
 269   0,            0,              0,              0,
 270   &rip6_usrreqs
 271 },
 272 };
 273
 274 extern int in6_inithead (void **, int);
 275
 276 struct domain inet6domain = {
 277         AF_INET6, "internet6", NULL, NULL, NULL,
 278         (struct protosw *)inet6sw,
 279         (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
 280         SLIST_ENTRY_INITIALIZER,
 281         in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3,
 282         sizeof(struct sockaddr_in6), in6_domifattach, in6_domifdetach
 283 };
 284
 285 DOMAIN_SET(inet6);
 286
 287 /*
 288  * Internet configuration info
 289  */
 290 #ifndef IPV6FORWARDING
 291 #ifdef GATEWAY6
 292 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 293 #else
 294 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 295 #endif /* GATEWAY6 */
 296 #endif /* !IPV6FORWARDING */
 297
 298 #ifndef IPV6_SENDREDIRECTS
 299 #define IPV6_SENDREDIRECTS      1
 300 #endif
 301
 302 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 303 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 304 int     ip6_defhlim = IPV6_DEFHLIM;
 305 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 306 int     ip6_accept_rtadv = 0;   /* "IPV6FORWARDING ? 0 : 1" is dangerous */
 307 int     ip6_maxfragpackets;     /* initialized in frag6.c:frag6_init() */
 308 int     ip6_log_interval = 5;
 309 int     ip6_hdrnestlimit = 50;  /* appropriate? */
 310 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 311 u_int32_t ip6_flow_seq;
 312 int     ip6_auto_flowlabel = 1;
 313 int     ip6_gif_hlim = 0;
 314 int     ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
 315 int     ip6_rr_prune = 5;       /* router renumbering prefix
 316                                  * walk list every 5 sec.    */
 317 int     ip6_v6only = 1;
 318
 319 u_int32_t ip6_id = 0UL;
 320 int     ip6_keepfaith = 0;
 321 time_t  ip6_log_time = (time_t)0L;
 322
 323 /* icmp6 */
 324 /*
 325  * BSDI4 defines these variables in in_proto.c...
 326  * XXX: what if we don't define INET? Should we define pmtu6_expire
 327  * or so? (jinmei@kame.net 19990310)
 328  */
 329 int pmtu_expire = 60*10;
 330 int pmtu_probe = 60*2;
 331
 332 /* raw IP6 parameters */
 333 /*
 334  * Nominal space allocated to a raw ip socket.
 335  */
 336 #define RIPV6SNDQ       8192
 337 #define RIPV6RCVQ       8192
 338
 339 u_long  rip6_sendspace = RIPV6SNDQ;
 340 u_long  rip6_recvspace = RIPV6RCVQ;
 341
 342 /* ICMPV6 parameters */
 343 int     icmp6_rediraccept = 1;          /* accept and process redirects */
 344 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 345 int     icmp6errppslim = 100;           /* 100pps */
 346 int     icmp6_nodeinfo = 3;             /* enable/disable NI response */
 347
 348 /* UDP on IP6 parameters */
 349 int     udp6_sendspace = 9216;          /* really max datagram size */
 350 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 351                                         /* 40 1K datagrams */
 352
 353 /*
 354  * sysctl related items.
 355  */
 356 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
 357         "Internet6 Family");
 358
 359 /* net.inet6 */
 360 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
 361 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
 362 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
 363 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
 364 #ifdef IPSEC
 365 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
 366 #endif /* IPSEC */
 367
 368 /* net.inet6.ip6 */
 369 static int
 370 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
 371 {
 372         int error = 0;
 373         int old;
 374
 375         error = SYSCTL_OUT(req, arg1, sizeof(int));
 376         if (error || !req->newptr)
 377                 return (error);
 378         old = ip6_temp_preferred_lifetime;
 379         error = SYSCTL_IN(req, arg1, sizeof(int));
 380         if (ip6_temp_preferred_lifetime <
 381             ip6_desync_factor + ip6_temp_regen_advance) {
 382                 ip6_temp_preferred_lifetime = old;
 383                 return (EINVAL);
 384         }
 385         return (error);
 386 }
 387
 388 static int
 389 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
 390 {
 391         int error = 0;
 392         int old;
 393
 394         error = SYSCTL_OUT(req, arg1, sizeof(int));
 395         if (error || !req->newptr)
 396                 return (error);
 397         old = ip6_temp_valid_lifetime;
 398         error = SYSCTL_IN(req, arg1, sizeof(int));
 399         if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 400                 ip6_temp_preferred_lifetime = old;
 401                 return (EINVAL);
 402         }
 403         return (error);
 404 }
 405
 406 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
 407         forwarding, CTLFLAG_RW,         &ip6_forwarding,        0, "");
 408 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
 409         redirect, CTLFLAG_RW,           &ip6_sendredirects,     0, "");
 410 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 411         hlim, CTLFLAG_RW,               &ip6_defhlim,   0, "");
 412 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
 413         &ip6stat, ip6stat, "");
 414 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
 415         maxfragpackets, CTLFLAG_RW,     &ip6_maxfragpackets,    0, "");
 416 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
 417         accept_rtadv, CTLFLAG_RW,       &ip6_accept_rtadv,      0, "");
 418 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 419         keepfaith, CTLFLAG_RW,          &ip6_keepfaith, 0, "");
 420 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 421         log_interval, CTLFLAG_RW,       &ip6_log_interval,      0, "");
 422 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
 423         hdrnestlimit, CTLFLAG_RW,       &ip6_hdrnestlimit,      0, "");
 424 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
 425         dad_count, CTLFLAG_RW,  &ip6_dad_count, 0, "");
 426 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
 427         auto_flowlabel, CTLFLAG_RW,     &ip6_auto_flowlabel,    0, "");
 428 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
 429         defmcasthlim, CTLFLAG_RW,       &ip6_defmcasthlim,      0, "");
 430 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
 431         gifhlim, CTLFLAG_RW,    &ip6_gif_hlim,                  0, "");
 432 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 433         kame_version, CTLFLAG_RD,       __KAME_VERSION,         0, "");
 434 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
 435         use_deprecated, CTLFLAG_RW,     &ip6_use_deprecated,    0, "");
 436 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 437         rr_prune, CTLFLAG_RW,   &ip6_rr_prune,                  0, "");
 438 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
 439         use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr,            0, "");
 440 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 441            CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
 442            sysctl_ip6_temppltime, "I", "");
 443 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 444            CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
 445            sysctl_ip6_tempvltime, "I", "");
 446 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
 447         v6only, CTLFLAG_RW,     &ip6_v6only,                    0, "");
 448 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
 449         auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal,        0, "");
 450 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
 451         &rip6stat, rip6stat, "");
 452
 453 /* net.inet6.icmp6 */
 454 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
 455         rediraccept, CTLFLAG_RW,        &icmp6_rediraccept,     0, "");
 456 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
 457         redirtimeout, CTLFLAG_RW,       &icmp6_redirtimeout,    0, "");
 458 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
 459         &icmp6stat, icmp6stat, "");
 460 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
 461         nd6_prune, CTLFLAG_RW,          &nd6_prune,     0, "");
 462 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
 463         nd6_delay, CTLFLAG_RW,          &nd6_delay,     0, "");
 464 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
 465         nd6_umaxtries, CTLFLAG_RW,      &nd6_umaxtries, 0, "");
 466 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
 467         nd6_mmaxtries, CTLFLAG_RW,      &nd6_mmaxtries, 0, "");
 468 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
 469         nd6_useloopback, CTLFLAG_RW,    &nd6_useloopback, 0, "");
 470 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 471         nodeinfo, CTLFLAG_RW,   &icmp6_nodeinfo,        0, "");
 472 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 473         errppslimit, CTLFLAG_RW,        &icmp6errppslim,        0, "");
 474 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
 475         nd6_maxnudhint, CTLFLAG_RW,     &nd6_maxnudhint, 0, "");
 476 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
 477         nd6_debug, CTLFLAG_RW,  &nd6_debug,             0, "");