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_drain = frag6_drain,
 162         .pr_usrreqs = &nousrreqs
 163     },
 164     {
 165         .pr_type = SOCK_DGRAM,
 166         .pr_domain = &inet6domain,
 167         .pr_protocol = IPPROTO_UDP,
 168         .pr_flags = PR_ATOMIC | PR_ADDR | PR_MPSAFE | PR_LASTHDR,
 169
 170         .pr_input = udp6_input,
 171         .pr_output = 0,
 172         .pr_ctlinput = udp6_ctlinput,
 173         .pr_ctloutput = ip6_ctloutput_dispatch,
 174
 175         .pr_ctlport = cpu0_ctlport,
 176         .pr_usrreqs = &udp6_usrreqs
 177     },
 178     {
 179         .pr_type = SOCK_STREAM,
 180         .pr_domain = &inet6domain,
 181         .pr_protocol = IPPROTO_TCP,
 182         .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN |
 183                     PR_MPSAFE | PR_LASTHDR | PR_ASYNC_SEND | PR_ASYNC_RCVD,
 184
 185         .pr_input = tcp6_input,
 186         .pr_output = NULL,
 187         .pr_ctlinput = tcp6_ctlinput,
 188         .pr_ctloutput = tcp_ctloutput,
 189
 190         .pr_ctlport = cpu0_ctlport,
 191 #ifndef INET
 192         /* don't call initialization and timeout routines twice */
 193         .pr_init = tcp_init,
 194 #endif
 195         .pr_drain = tcp_drain,
 196         .pr_usrreqs = &tcp6_usrreqs
 197     },
 198     {
 199         .pr_type = SOCK_RAW,
 200         .pr_domain = &inet6domain,
 201         .pr_protocol = IPPROTO_RAW,
 202         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 203
 204         .pr_input = rip6_input,
 205         .pr_output = rip6_output,
 206         .pr_ctlinput = rip6_ctlinput,
 207         .pr_ctloutput = rip6_ctloutput,
 208
 209         .pr_ctlport = cpu0_ctlport,
 210         .pr_usrreqs = &rip6_usrreqs
 211     },
 212     {
 213         .pr_type = SOCK_RAW,
 214         .pr_domain = &inet6domain,
 215         .pr_protocol = IPPROTO_ICMPV6,
 216         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 217
 218         .pr_input = icmp6_input,
 219         .pr_output = rip6_output,
 220         .pr_ctlinput = rip6_ctlinput,
 221         .pr_ctloutput = rip6_ctloutput,
 222
 223         .pr_ctlport = cpu0_ctlport,
 224         .pr_init = icmp6_init,
 225         .pr_drain = NULL,
 226
 227         .pr_usrreqs = &rip6_usrreqs
 228     },
 229     {
 230         .pr_type = SOCK_RAW,
 231         .pr_domain = &inet6domain,
 232         .pr_protocol = IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR,
 233
 234         .pr_input = dest6_input,
 235         .pr_output = NULL,
 236         .pr_ctlinput = NULL,
 237         .pr_ctloutput = NULL,
 238
 239         .pr_usrreqs = &nousrreqs
 240     },
 241     {
 242         .pr_type = SOCK_RAW,
 243         .pr_domain = &inet6domain,
 244         .pr_protocol = IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR,
 245
 246         .pr_input = route6_input,
 247         .pr_output = NULL,
 248         .pr_ctlinput = NULL,
 249         .pr_ctloutput = NULL,
 250
 251         .pr_usrreqs = &nousrreqs
 252     },
 253     {
 254         .pr_type = SOCK_RAW,
 255         .pr_domain = &inet6domain,
 256         .pr_protocol = IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR,
 257
 258         .pr_input = frag6_input,
 259         .pr_output = NULL,
 260         .pr_ctlinput = NULL,
 261         .pr_ctloutput = NULL,
 262
 263         .pr_usrreqs = &nousrreqs
 264     },
 265 #ifdef IPSEC
 266     {
 267         .pr_type = SOCK_RAW,
 268         .pr_domain = &inet6domain,
 269         .pr_protocol = IPPROTO_AH,
 270         .pr_flags = PR_ATOMIC|PR_ADDR,
 271
 272         .pr_input = ah6_input,
 273         .pr_output = NULL,
 274         .pr_ctlinput = NULL,
 275         .pr_ctloutput = NULL,
 276
 277         .pr_usrreqs = &nousrreqs
 278     },
 279 #ifdef IPSEC_ESP
 280     {
 281         .pr_type = SOCK_RAW,
 282         .pr_domain = &inet6domain,
 283         .pr_protocol = IPPROTO_ESP,
 284         .pr_flags = PR_ATOMIC|PR_ADDR,
 285
 286         .pr_input = esp6_input,
 287         .pr_output = NULL,
 288         .pr_ctlinput = esp6_ctlinput,
 289         .pr_ctloutput = NULL,
 290
 291         .pr_usrreqs = &nousrreqs
 292     },
 293 #endif
 294     {
 295         .pr_type = SOCK_RAW,
 296         .pr_domain = &inet6domain,
 297         .pr_protocol = IPPROTO_IPCOMP,
 298         .pr_flags = PR_ATOMIC|PR_ADDR,
 299
 300         .pr_input = ipcomp6_input,
 301         .pr_output = NULL,
 302         .pr_ctlinput = NULL,
 303         .pr_ctloutput = NULL,
 304
 305         .pr_usrreqs = &nousrreqs
 306     },
 307 #endif /* IPSEC */
 308 #ifdef INET
 309     {
 310         .pr_type = SOCK_RAW,
 311         .pr_domain = &inet6domain,
 312         .pr_protocol = IPPROTO_IPV4,
 313         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 314
 315         .pr_input = encap6_input,
 316         .pr_output = rip6_output,
 317         .pr_ctlinput = NULL,
 318         .pr_ctloutput = rip6_ctloutput,
 319
 320         .pr_init = encap_init,
 321         .pr_usrreqs = &rip6_usrreqs
 322     },
 323 #endif /* INET */
 324     {
 325         .pr_type = SOCK_RAW,
 326         .pr_domain = &inet6domain,
 327         .pr_protocol = IPPROTO_IPV6,
 328         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 329
 330         .pr_input = encap6_input,
 331         .pr_output = rip6_output,
 332         .pr_ctlinput = NULL,
 333         .pr_ctloutput = rip6_ctloutput,
 334
 335         .pr_init = encap_init,
 336         .pr_usrreqs = &rip6_usrreqs
 337     },
 338     {
 339         .pr_type = SOCK_RAW,
 340         .pr_domain = &inet6domain,
 341         .pr_protocol = IPPROTO_PIM,
 342         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 343
 344         .pr_input = pim6_input,
 345         .pr_output = rip6_output,
 346         .pr_ctlinput = NULL,
 347         .pr_ctloutput = rip6_ctloutput,
 348
 349         .pr_usrreqs = &rip6_usrreqs
 350     },
 351 #ifdef CARP
 352     {
 353         .pr_type = SOCK_RAW,
 354         .pr_domain = &inet6domain,
 355         .pr_protocol = IPPROTO_CARP,
 356         .pr_flags = PR_ATOMIC|PR_ADDR,
 357
 358         .pr_input = carp6_proto_input,
 359         .pr_output = rip6_output,
 360         .pr_ctlinput = NULL,
 361         .pr_ctloutput = rip6_ctloutput,
 362
 363         .pr_usrreqs = &rip6_usrreqs
 364     },
 365 #endif /* CARP */
 366
 367     /* raw wildcard */
 368     {
 369         .pr_type = SOCK_RAW,
 370         .pr_domain = &inet6domain,
 371         .pr_protocol = 0,
 372         .pr_flags = PR_ATOMIC|PR_ADDR,
 373
 374         .pr_input = rip6_input,
 375         .pr_output = rip6_output,
 376         .pr_ctlinput = NULL,
 377         .pr_ctloutput = rip6_ctloutput,
 378
 379         .pr_usrreqs = &rip6_usrreqs
 380     },
 381 };
 382
 383 extern int in6_inithead (void **, int);
 384
 385 struct domain inet6domain = {
 386         .dom_family             = AF_INET6,
 387         .dom_name               = "internet6",
 388         .dom_init               = NULL,
 389         .dom_externalize        = NULL,
 390         .dom_dispose            = NULL,
 391         .dom_protosw            = inet6sw,
 392         .dom_protoswNPROTOSW    = &inet6sw[NELEM(inet6sw)],
 393         .dom_next               = SLIST_ENTRY_INITIALIZER,
 394         .dom_rtattach           = in6_inithead,
 395         .dom_rtoffset           = offsetof(struct sockaddr_in6, sin6_addr) << 3,
 396         .dom_maxrtkey           = sizeof(struct sockaddr_in6),
 397         .dom_ifattach           = in6_domifattach,
 398         .dom_ifdetach           = in6_domifdetach
 399 };
 400
 401 DOMAIN_SET(inet6);
 402
 403 /*
 404  * Internet configuration info
 405  */
 406 #ifndef IPV6FORWARDING
 407 #ifdef GATEWAY6
 408 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
 409 #else
 410 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
 411 #endif /* GATEWAY6 */
 412 #endif /* !IPV6FORWARDING */
 413
 414 #ifndef IPV6_SENDREDIRECTS
 415 #define IPV6_SENDREDIRECTS      1
 416 #endif
 417
 418 int     nd6_onlink_ns_rfc4861 = 0; /* allow 'on-link' NS/NA (as in RFC 4861) */
 419
 420 int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
 421 int     ip6_sendredirects = IPV6_SENDREDIRECTS;
 422 int     ip6_defhlim = IPV6_DEFHLIM;
 423 int     ip6_minhlim = IPV6_MINHLIM;
 424 int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
 425 int     ip6_accept_rtadv = 0;   /* "IPV6FORWARDING ? 0 : 1" is dangerous */
 426 int     ip6_maxfragpackets;     /* initialized in frag6.c:frag6_init() */
 427 int     ip6_maxfrags;           /* initialized in frag6.c:frag6_init() */
 428 int     ip6_log_interval = 5;
 429 int     ip6_hdrnestlimit = 50;  /* appropriate? */
 430 int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
 431 u_int32_t ip6_flow_seq;
 432 int     ip6_auto_flowlabel = 1;
 433 int     ip6_gif_hlim = 0;
 434 int     ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
 435 int     ip6_rr_prune = 5;       /* router renumbering prefix
 436                                  * walk list every 5 sec. */
 437
 438 u_int32_t ip6_id = 0UL;
 439 int     ip6_keepfaith = 0;
 440 time_t  ip6_log_time = (time_t)0L;
 441
 442 /* icmp6 */
 443 /*
 444  * BSDI4 defines these variables in in_proto.c...
 445  * XXX: what if we don't define INET? Should we define pmtu6_expire
 446  * or so? (jinmei@kame.net 19990310)
 447  */
 448 int pmtu_expire = 60*10;
 449 int pmtu_probe = 60*2;
 450
 451 /* raw IP6 parameters */
 452 /*
 453  * Nominal space allocated to a raw ip socket.
 454  */
 455 #define RIPV6SNDQ       8192
 456 #define RIPV6RCVQ       8192
 457
 458 u_long  rip6_sendspace = RIPV6SNDQ;
 459 u_long  rip6_recvspace = RIPV6RCVQ;
 460
 461 /* ICMPV6 parameters */
 462 int     icmp6_rediraccept = 1;          /* accept and process redirects */
 463 int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
 464 int     icmp6errppslim = 100;           /* 100pps */
 465 int     icmp6_nodeinfo = 3;             /* enable/disable NI response */
 466
 467 /* UDP on IP6 parameters */
 468 int     udp6_sendspace = 9216;          /* really max datagram size */
 469 int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
 470                                         /* 40 1K datagrams */
 471
 472 /*
 473  * sysctl related items.
 474  */
 475 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
 476         "Internet6 Family");
 477
 478 /* net.inet6 */
 479 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
 480 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
 481 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
 482 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
 483 #ifdef IPSEC
 484 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
 485 #endif /* IPSEC */
 486
 487 /* net.inet6.ip6 */
 488 static int
 489 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
 490 {
 491         int error = 0;
 492         int old;
 493
 494         error = SYSCTL_OUT(req, arg1, sizeof(int));
 495         if (error || !req->newptr)
 496                 return (error);
 497         old = ip6_temp_preferred_lifetime;
 498         error = SYSCTL_IN(req, arg1, sizeof(int));
 499         if (ip6_temp_preferred_lifetime <
 500             ip6_desync_factor + ip6_temp_regen_advance) {
 501                 ip6_temp_preferred_lifetime = old;
 502                 return (EINVAL);
 503         }
 504         return (error);
 505 }
 506
 507 static int
 508 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
 509 {
 510         int error = 0;
 511         int old;
 512
 513         error = SYSCTL_OUT(req, arg1, sizeof(int));
 514         if (error || !req->newptr)
 515                 return (error);
 516         old = ip6_temp_valid_lifetime;
 517         error = SYSCTL_IN(req, arg1, sizeof(int));
 518         if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) {
 519                 ip6_temp_preferred_lifetime = old;
 520                 return (EINVAL);
 521         }
 522         return (error);
 523 }
 524
 525 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
 526     &ip6_forwarding, 0, "Enable IP forwarding between interfaces");
 527 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
 528     &ip6_sendredirects, 0, "Enable sending IP redirects");
 529 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM,
 530     hlim, CTLFLAG_RW, &ip6_defhlim, 0, "Default hop limit");
 531 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MINHLIM,
 532     minhlim, CTLFLAG_RW, &ip6_minhlim, 0, "Default hop limit");
 533 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
 534     &ip6stat, ip6stat, "IP stats");
 535 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
 536     CTLFLAG_RW, &ip6_maxfragpackets, 0, "Maximum packets in reassembly queue");
 537 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
 538     CTLFLAG_RW, &ip6_accept_rtadv, 0, "Acts as a host not a router");
 539 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH,
 540     keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0,
 541     "Enable packet capture for FAITH IPv4->IPv6 translator daemon");
 542 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL,
 543         log_interval, CTLFLAG_RW,       &ip6_log_interval,      0, "");
 544 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, CTLFLAG_RW,
 545     &ip6_hdrnestlimit,  0, "Upper limit of # of extension headers");
 546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
 547     &ip6_dad_count, 0, "Number of times to perform duplicate address detectione");
 548 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, CTLFLAG_RW,
 549     &ip6_auto_flowlabel, 0, "Enable attaching flowlabel automatically");
 550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, CTLFLAG_RW,
 551     &ip6_defmcasthlim, 0, "Default multicast hop limit");
 552 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, gifhlim, CTLFLAG_RW,
 553     &ip6_gif_hlim,      0, "Hop limit for gif encap packet");
 554 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION,
 555         kame_version, CTLFLAG_RD,       __KAME_VERSION,         0, "Kame version");
 556 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, CTLFLAG_RW,
 557     &ip6_use_deprecated, 0, "Allow deprecated addr as source");
 558 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE,
 559         rr_prune, CTLFLAG_RW,   &ip6_rr_prune,  0,
 560     "Walk timer for router renumbering");
 561 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, CTLFLAG_RW,
 562     &ip6_use_tempaddr, 0, "Whether to use temporary addresses");
 563 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
 564     CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0,
 565     sysctl_ip6_temppltime, "I",
 566     "Preferred lifetime for tmpaddrs");
 567 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
 568     CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0,
 569     sysctl_ip6_tempvltime, "I",
 570     "Valid lifetime for tmpaddrs");
 571 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, CTLFLAG_RW,
 572     &ip6_auto_linklocal, 0, "Enable auto-assigning a link-local address");
 573 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
 574     &rip6stat, rip6stat, "Raw stats");
 575 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW,
 576     &ip6_maxfrags, 0, "Maximum fragments in reassembly queues");
 577
 578 /* net.inet6.icmp6 */
 579 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, CTLFLAG_RW,
 580     &icmp6_rediraccept, 0, "If enabled, accept and process redirects");
 581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, CTLFLAG_RW,
 582     &icmp6_redirtimeout, 0, "Cache time for redirect routes");
 583 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
 584     &icmp6stat, icmp6stat, "Stats");
 585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
 586     &nd6_prune, 0, "Prune interval");
 587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
 588     &nd6_delay, 0, "Reachability timeout for stale neighbors");
 589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, CTLFLAG_RW,
 590     &nd6_umaxtries,     0, "Maximum unicast query");
 591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, CTLFLAG_RW,
 592     &nd6_mmaxtries, 0, "Maximum multicast query");
 593 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, CTLFLAG_RW,
 594     &nd6_useloopback, 0, "Use loopback interface for local traffic");
 595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO,
 596     nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "Enable/disable NI response");
 597 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT,
 598         errppslimit, CTLFLAG_RW,        &icmp6errppslim,        0,
 599     "ICMPv6 error maximum packet-per-second value (default: 100pps)");
 600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, CTLFLAG_RW,
 601     &nd6_maxnudhint, 0, "Max # of subsequent upper layer hints");
 602 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
 603     &nd6_debug, 0, "Enable debug output");
 604 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, nd6_onlink_ns_rfc4861, CTLFLAG_RW,
 605     &nd6_onlink_ns_rfc4861, 0, "Accept 'on-link' NS/NA in compliance with RFC 4861.");