bsd/netinet6/in6_proto.c

   1 /*      $FreeBSD: src/sys/netinet6/in6_proto.c,v 1.6.2.7 2001/07/24 19:10:18 brooks 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. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      @(#)in_proto.c  8.1 (Berkeley) 6/10/93
  66  */
  67
  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 #include <netinet6/in6_prefix.h>
 104
 105 #if IPSEC
 106 #include <netinet6/ipsec.h>
 107 #if INET6
 108 #include <netinet6/ipsec6.h>
 109 #endif
 110 #include <netinet6/ah.h>
 111 #if INET6
 112 #include <netinet6/ah6.h>
 113 #endif
 114 #if IPSEC_ESP
 115 #include <netinet6/esp.h>
 116 #if INET6
 117 #include <netinet6/esp6.h>
 118 #endif
 119 #endif
 120 #include <netinet6/ipcomp.h>
 121 #if INET6
 122 #include <netinet6/ipcomp6.h>
 123 #endif
 124 #endif /*IPSEC*/
 125
 126 #include <netinet6/ip6protosw.h>
 127
 128 #include <net/net_osdep.h>
 129
 130 /*
 131  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
 132  */
 133
 134 extern  struct domain inet6domain;
 135 static struct pr_usrreqs nousrreqs;
 136
 137 #define PR_LISTEN       0
 138 #define PR_ABRTACPTDIS  0
 139
 140 extern struct domain inet6domain;
 141 extern int in6_inithead __P((void **, int));
 142 void in6_dinit(void);
 143
 144 struct ip6protosw inet6sw[] = {
 145 { 0,            &inet6domain,   IPPROTO_IPV6,   0,
 146   0,            0,              0,              0,
 147   0,
 148   ip6_init,     0,              frag6_slowtimo, frag6_drain,
 149   0, &nousrreqs
 150 },
 151 { SOCK_DGRAM,   &inet6domain,   IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
 152   udp6_input,   0,              udp6_ctlinput,  ip6_ctloutput,
 153   0,
 154   0,            0,              0,              0,
 155   0, &udp6_usrreqs
 156 },
 157 { SOCK_STREAM,  &inet6domain,   IPPROTO_TCP,    PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
 158   tcp6_input,   0,              tcp6_ctlinput,  tcp_ctloutput,
 159   0,
 160 #if INET        /* don't call initialization and timeout routines twice */
 161   0,            0,              0,              tcp_drain,
 162 #else
 163   tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
 164 #endif
 165   0, &tcp6_usrreqs,
 166 },
 167 { SOCK_RAW,     &inet6domain,   IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 168   rip6_input,   rip6_output,    rip6_ctlinput,  rip6_ctloutput,
 169   0,
 170   0,            0,              0,              0,
 171   0, &rip6_usrreqs
 172 },
 173 { SOCK_RAW,     &inet6domain,   IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 174   icmp6_input,  rip6_output,    rip6_ctlinput,  rip6_ctloutput,
 175   0,
 176   icmp6_init,   icmp6_fasttimo, 0,              0,
 177   0, &rip6_usrreqs
 178 },
 179 { SOCK_RAW,     &inet6domain,   IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
 180   dest6_input,  0,              0,              0,
 181   0,
 182   0,            0,              0,              0,
 183   0, &nousrreqs
 184 },
 185 { SOCK_RAW,     &inet6domain,   IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
 186   route6_input, 0,              0,              0,
 187   0,
 188   0,            0,              0,              0,
 189   0, &nousrreqs
 190 },
 191 { SOCK_RAW,     &inet6domain,   IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
 192   frag6_input,  0,              0,              0,
 193   0,
 194   0,            0,              0,              0,
 195   0, &nousrreqs
 196 },
 197 #if IPSEC
 198 { SOCK_RAW,     &inet6domain,   IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 199   ah6_input,    0,              0,              0,
 200   0,
 201   0,            0,              0,              0,
 202   0, &nousrreqs
 203 },
 204 #if IPSEC_ESP
 205 { SOCK_RAW,     &inet6domain,   IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 206   esp6_input,   0,
 207   esp6_ctlinput,
 208   0,
 209   0,
 210   0,            0,              0,              0,
 211   0, &nousrreqs
 212 },
 213 #endif
 214 { SOCK_RAW,     &inet6domain,   IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 215   ipcomp6_input, 0,             0,              0,
 216   0,
 217   0,            0,              0,              0,
 218   0, &nousrreqs
 219 },
 220 #endif /* IPSEC */
 221 #if INET
 222 { SOCK_RAW,     &inet6domain,   IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 223   encap6_input, rip6_output,    0,              rip6_ctloutput,
 224   0,
 225   encap_init,   0,              0,              0,
 226   0, &rip6_usrreqs
 227 },
 228 #endif /*INET*/
 229 { SOCK_RAW,     &inet6domain,   IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 230   encap6_input, rip6_output,    0,              rip6_ctloutput,
 231   0,
 232   encap_init,   0,              0,              0,
 233   0, &rip6_usrreqs
 234 },
 235 { SOCK_RAW,     &inet6domain,   IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 236   pim6_input,   rip6_output,    0,              rip6_ctloutput,
 237   0,
 238   0,            0,              0,              0,
 239   0, &rip6_usrreqs
 240 },
 241 /* raw wildcard */
 242 { SOCK_RAW,     &inet6domain,   0,              PR_ATOMIC|PR_ADDR,
 243   rip6_input,   rip6_output,    0,              rip6_ctloutput,
 244   0,
 245   0,            0,              0,              0,
 246   0, &rip6_usrreqs
 247 },
 248 };
 249
 250
 251 int in6_proto_count = (sizeof (inet6sw) / sizeof (struct ip6protosw));
 252
 253 struct domain inet6domain =
 254     { AF_INET6, "internet6", in6_dinit, 0, 0,
 255       inet6sw, 0,
 256       in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3, sizeof(struct sockaddr_in6) ,
 257       sizeof(struct sockaddr_in6), 0
 258     };
 259
 260 DOMAIN_SET(inet6);
 261
 262 /* Initialize the PF_INET6 domain, and add in the pre-defined protos */
 263 void
 264 in6_dinit()
 265 {
 266         register int i;
 267         register struct ip6protosw *pr;
 268         register struct domain *dp;
 269         static inet6domain_initted = 0;
 270
 271         if (!inet6domain_initted) {
 272                 dp = &inet6domain;
 273
 274                 for (i=0, pr = &inet6sw[0]; i<in6_proto_count; i++, pr++)
 275                         net_add_proto((struct protosw*)pr, dp);
 276
 277                 inet6domain_initted = 1;
 278         }
 279 }
 280
 281
 282 /*
 283  * Internet configuration info
 284  */
 285 #ifndef IPV6FORWARDING
 286 #if GATEWAY6
 287 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 288 #else
 289 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 290 #endif /* GATEWAY6 */
 291 #endif /* !IPV6FORWARDING */
 292
 293 #ifndef IPV6_SENDREDIRECTS
 294 #define IPV6_SENDREDIRECTS      1
 295 #endif
 296
 297 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 298 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 299 int     ip6_defhlim = IPV6_DEFHLIM;
 300 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 301 //int   ip6_accept_rtadv = 0;   /* "IPV6FORWARDING ? 0 : 1" is dangerous */
 302 int     ip6_accept_rtadv = 1;   /* "IPV6FORWARDING ? 0 : 1" is dangerous */
 303 int     ip6_maxfragpackets;     /* initialized in frag6.c:frag6_init() */
 304 int     ip6_log_interval = 5;
 305 int     ip6_hdrnestlimit = 50;  /* appropriate? */
 306 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 307 u_int32_t ip6_flow_seq;
 308 int     ip6_auto_flowlabel = 1;
 309 int     ip6_gif_hlim = 0;
 310 int     ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
 311 int     ip6_rr_prune = 5;       /* router renumbering prefix
 312                                  * walk list every 5 sec.    */
 313 int     ip6_v6only = 0;
 314 #ifdef __APPLE__
 315 int     ip6_auto_on = 1;        /* Start IPv6 per interface triggered by IPv4 address assignment */
 316 #endif
 317
 318 u_int32_t ip6_id = 0UL;
 319 int     ip6_keepfaith = 0;
 320 time_t  ip6_log_time = (time_t)0L;
 321
 322 /* icmp6 */
 323 /*
 324  * BSDI4 defines these variables in in_proto.c...
 325  * XXX: what if we don't define INET? Should we define pmtu6_expire
 326  * or so? (jinmei@kame.net 19990310)
 327  */
 328 int pmtu_expire = 60*10;
 329 int pmtu_probe = 60*2;
 330
 331 /* raw IP6 parameters */
 332 /*
 333  * Nominal space allocated to a raw ip socket.
 334  */
 335 #define RIPV6SNDQ       8192
 336 #define RIPV6RCVQ       8192
 337
 338 u_long  rip6_sendspace = RIPV6SNDQ;
 339 u_long  rip6_recvspace = RIPV6RCVQ;
 340
 341 /* ICMPV6 parameters */
 342 int     icmp6_rediraccept = 1;          /* accept and process redirects */
 343 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 344 int     icmp6errppslim = 100;           /* 100pps */
 345 int     icmp6_nodeinfo = 1;             /* enable/disable NI response */
 346
 347 /* UDP on IP6 parameters */
 348 int     udp6_sendspace = 9216;          /* really max datagram size */
 349 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 350                                         /* 40 1K datagrams */
 351
 352 /*
 353  * sysctl related items.
 354  */
 355 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
 356         "Internet6 Family");
 357
 358 /* net.inet6 */
 359 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
 360 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
 361 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
 362 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
 363 #if IPSEC
 364 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
 365 #endif /* IPSEC */
 366
 367 /* net.inet6.ip6 */
 368 static int
 369 sysctl_ip6_temppltime SYSCTL_HANDLER_ARGS
 370 {
 371         int error = 0;
 372         int old;
 373
 374         error = SYSCTL_OUT(req, arg1, sizeof(int));
 375         if (error || !req->newptr)
 376                 return (error);
 377         old = ip6_temp_preferred_lifetime;
 378         error = SYSCTL_IN(req, arg1, sizeof(int));
 379         if (ip6_temp_preferred_lifetime <
 380             ip6_desync_factor + ip6_temp_regen_advance) {
 381                 ip6_temp_preferred_lifetime = old;
 382                 return(EINVAL);
 383         }
 384         return(error);
 385 }
 386
 387 static int
 388 sysctl_ip6_tempvltime SYSCTL_HANDLER_ARGS
 389 {
 390         int error = 0;
 391         int old;
 392
 393         error = SYSCTL_OUT(req, arg1, sizeof(int));
 394         if (error || !req->newptr)
 395                 return (error);
 396         old = ip6_temp_valid_lifetime;
 397         error = SYSCTL_IN(req, arg1, sizeof(int));
 398         if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 399                 ip6_temp_preferred_lifetime = old;
 400                 return(EINVAL);
 401         }
 402         return(error);
 403 }
 404
 405 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING,
 406         forwarding, CTLFLAG_RW,         &ip6_forwarding,        0, "");
 407 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS,
 408         redirect, CTLFLAG_RW,           &ip6_sendredirects,     0, "");
 409 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 410         hlim, CTLFLAG_RW,               &ip6_defhlim,   0, "");
 411 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
 412         &ip6stat, ip6stat, "");
 413 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS,
 414         maxfragpackets, CTLFLAG_RW,     &ip6_maxfragpackets,    0, "");
 415 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV,
 416         accept_rtadv, CTLFLAG_RW,       &ip6_accept_rtadv,      0, "");
 417 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 418         keepfaith, CTLFLAG_RW,          &ip6_keepfaith, 0, "");
 419 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 420         log_interval, CTLFLAG_RW,       &ip6_log_interval,      0, "");
 421 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT,
 422         hdrnestlimit, CTLFLAG_RW,       &ip6_hdrnestlimit,      0, "");
 423 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT,
 424         dad_count, CTLFLAG_RW,  &ip6_dad_count, 0, "");
 425 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL,
 426         auto_flowlabel, CTLFLAG_RW,     &ip6_auto_flowlabel,    0, "");
 427 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM,
 428         defmcasthlim, CTLFLAG_RW,       &ip6_defmcasthlim,      0, "");
 429 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM,
 430         gifhlim, CTLFLAG_RW,    &ip6_gif_hlim,                  0, "");
 431 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 432         kame_version, CTLFLAG_RD,       __KAME_VERSION,         0, "");
 433 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED,
 434         use_deprecated, CTLFLAG_RW,     &ip6_use_deprecated,    0, "");
 435 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 436         rr_prune, CTLFLAG_RW,   &ip6_rr_prune,                  0, "");
 437 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR,
 438         use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr,            0, "");
 439 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 440            CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
 441            sysctl_ip6_temppltime, "I", "");
 442 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 443            CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
 444            sysctl_ip6_tempvltime, "I", "");
 445 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY,
 446         v6only, CTLFLAG_RW,     &ip6_v6only,                    0, "");
 447 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL,
 448         auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal,        0, "");
 449 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
 450         &rip6stat, rip6stat, "");
 451
 452 /* net.inet6.icmp6 */
 453 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT,
 454         rediraccept, CTLFLAG_RW,        &icmp6_rediraccept,     0, "");
 455 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT,
 456         redirtimeout, CTLFLAG_RW,       &icmp6_redirtimeout,    0, "");
 457 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
 458         &icmp6stat, icmp6stat, "");
 459 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE,
 460         nd6_prune, CTLFLAG_RW,          &nd6_prune,     0, "");
 461 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY,
 462         nd6_delay, CTLFLAG_RW,          &nd6_delay,     0, "");
 463 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES,
 464         nd6_umaxtries, CTLFLAG_RW,      &nd6_umaxtries, 0, "");
 465 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES,
 466         nd6_mmaxtries, CTLFLAG_RW,      &nd6_mmaxtries, 0, "");
 467 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK,
 468         nd6_useloopback, CTLFLAG_RW,    &nd6_useloopback, 0, "");
 469 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 470         nodeinfo, CTLFLAG_RW,   &icmp6_nodeinfo,        0, "");
 471 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 472         errppslimit, CTLFLAG_RW,        &icmp6errppslim,        0, "");
 473 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT,
 474         nd6_maxnudhint, CTLFLAG_RW,     &nd6_maxnudhint, 0, "");
 475 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG,
 476         nd6_debug, CTLFLAG_RW,  &nd6_debug,             0, "");
 477
 478 #ifdef __APPLE__
 479 SYSCTL_INT(_net_inet6_ip6, OID_AUTO, auto_on, CTLFLAG_RW, &ip6_auto_on,0, "");
 480 #endif