The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6_proto.c

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    1 /*-
    2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the project nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $
   30  */
   31 
   32 /*-
   33  * Copyright (c) 1982, 1986, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 4. Neither the name of the University nor the names of its contributors
   45  *    may be used to endorse or promote products derived from this software
   46  *    without specific prior written permission.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   58  * SUCH DAMAGE.
   59  *
   60  *      @(#)in_proto.c  8.1 (Berkeley) 6/10/93
   61  */
   62 
   63 #include <sys/cdefs.h>
   64 __FBSDID("$FreeBSD: stable/8/sys/netinet6/in6_proto.c 231453 2012-02-10 22:26:33Z tuexen $");
   65 
   66 #include "opt_inet.h"
   67 #include "opt_inet6.h"
   68 #include "opt_ipsec.h"
   69 #include "opt_ipstealth.h"
   70 #include "opt_sctp.h"
   71 #include "opt_mpath.h"
   72 
   73 #include <sys/param.h>
   74 #include <sys/socket.h>
   75 #include <sys/socketvar.h>
   76 #include <sys/proc.h>
   77 #include <sys/protosw.h>
   78 #include <sys/jail.h>
   79 #include <sys/kernel.h>
   80 #include <sys/domain.h>
   81 #include <sys/mbuf.h>
   82 #include <sys/systm.h>
   83 #include <sys/sysctl.h>
   84 
   85 #include <net/if.h>
   86 #include <net/radix.h>
   87 #include <net/route.h>
   88 #ifdef RADIX_MPATH
   89 #include <net/radix_mpath.h>
   90 #endif
   91 
   92 #include <netinet/in.h>
   93 #include <netinet/in_systm.h>
   94 #include <netinet/in_var.h>
   95 #include <netinet/ip_encap.h>
   96 #include <netinet/ip.h>
   97 #include <netinet/ip_var.h>
   98 #include <netinet/ip6.h>
   99 #include <netinet6/ip6_var.h>
  100 #include <netinet/icmp6.h>
  101 
  102 #include <netinet/tcp.h>
  103 #include <netinet/tcp_timer.h>
  104 #include <netinet/tcp_var.h>
  105 #include <netinet/udp.h>
  106 #include <netinet/udp_var.h>
  107 #include <netinet6/tcp6_var.h>
  108 #include <netinet6/raw_ip6.h>
  109 #include <netinet6/udp6_var.h>
  110 #include <netinet6/pim6_var.h>
  111 #include <netinet6/nd6.h>
  112 
  113 #ifdef SCTP
  114 #include <netinet/in_pcb.h>
  115 #include <netinet/sctp_pcb.h>
  116 #include <netinet/sctp.h>
  117 #include <netinet/sctp_var.h>
  118 #include <netinet6/sctp6_var.h>
  119 #endif /* SCTP */
  120 
  121 #ifdef IPSEC
  122 #include <netipsec/ipsec.h>
  123 #include <netipsec/ipsec6.h>
  124 #endif /* IPSEC */
  125 
  126 #include <netinet6/ip6protosw.h>
  127 
  128 /*
  129  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
  130  */
  131 FEATURE(inet6, "Internet Protocol version 6");
  132 
  133 extern  struct domain inet6domain;
  134 static  struct pr_usrreqs nousrreqs;
  135 
  136 #define PR_LISTEN       0
  137 #define PR_ABRTACPTDIS  0
  138 
  139 /* Spacer for loadable protocols. */
  140 #define IP6PROTOSPACER                          \
  141 {                                               \
  142         .pr_domain =            &inet6domain,   \
  143         .pr_protocol =          PROTO_SPACER,   \
  144         .pr_usrreqs =           &nousrreqs      \
  145 }
  146 
  147 struct ip6protosw inet6sw[] = {
  148 {
  149         .pr_type =              0,
  150         .pr_domain =            &inet6domain,
  151         .pr_protocol =          IPPROTO_IPV6,
  152         .pr_init =              ip6_init,
  153 #ifdef VIMAGE
  154         .pr_destroy =           ip6_destroy,
  155 #endif
  156         .pr_slowtimo =          frag6_slowtimo,
  157         .pr_drain =             frag6_drain,
  158         .pr_usrreqs =           &nousrreqs,
  159 },
  160 {
  161         .pr_type =              SOCK_DGRAM,
  162         .pr_domain =            &inet6domain,
  163         .pr_protocol =          IPPROTO_UDP,
  164         .pr_flags =             PR_ATOMIC|PR_ADDR,
  165         .pr_input =             udp6_input,
  166         .pr_ctlinput =          udp6_ctlinput,
  167         .pr_ctloutput =         ip6_ctloutput,
  168         .pr_usrreqs =           &udp6_usrreqs,
  169 },
  170 {
  171         .pr_type =              SOCK_STREAM,
  172         .pr_domain =            &inet6domain,
  173         .pr_protocol =          IPPROTO_TCP,
  174         .pr_flags =             PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
  175         .pr_input =             tcp6_input,
  176         .pr_ctlinput =          tcp6_ctlinput,
  177         .pr_ctloutput =         tcp_ctloutput,
  178 #ifndef INET    /* don't call initialization and timeout routines twice */
  179         .pr_init =              tcp_init,
  180         .pr_slowtimo =          tcp_slowtimo,
  181 #endif
  182         .pr_drain =             tcp_drain,
  183         .pr_usrreqs =           &tcp6_usrreqs,
  184 },
  185 #ifdef SCTP
  186 {
  187         .pr_type =              SOCK_SEQPACKET,
  188         .pr_domain =            &inet6domain,
  189         .pr_protocol =          IPPROTO_SCTP,
  190         .pr_flags =             PR_WANTRCVD,
  191         .pr_input =             sctp6_input,
  192         .pr_ctlinput =          sctp6_ctlinput,
  193         .pr_ctloutput = sctp_ctloutput,
  194         .pr_drain =             sctp_drain,
  195 #ifndef INET    /* Do not call initialization twice. */
  196         .pr_init =              sctp_init,
  197 #endif
  198         .pr_usrreqs =           &sctp6_usrreqs
  199 },
  200 {
  201         .pr_type =              SOCK_STREAM,
  202         .pr_domain =            &inet6domain,
  203         .pr_protocol =          IPPROTO_SCTP,
  204         .pr_flags =             PR_WANTRCVD,
  205         .pr_input =             sctp6_input,
  206         .pr_ctlinput =  sctp6_ctlinput,
  207         .pr_ctloutput =         sctp_ctloutput,
  208         .pr_drain =             sctp_drain,
  209         .pr_usrreqs =           &sctp6_usrreqs
  210 },
  211 #endif /* SCTP */
  212 {
  213         .pr_type =              SOCK_RAW,
  214         .pr_domain =            &inet6domain,
  215         .pr_protocol =          IPPROTO_RAW,
  216         .pr_flags =             PR_ATOMIC|PR_ADDR,
  217         .pr_input =             rip6_input,
  218         .pr_output =            rip6_output,
  219         .pr_ctlinput =          rip6_ctlinput,
  220         .pr_ctloutput =         rip6_ctloutput,
  221         .pr_usrreqs =           &rip6_usrreqs
  222 },
  223 {
  224         .pr_type =              SOCK_RAW,
  225         .pr_domain =            &inet6domain,
  226         .pr_protocol =          IPPROTO_ICMPV6,
  227         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  228         .pr_input =             icmp6_input,
  229         .pr_output =            rip6_output,
  230         .pr_ctlinput =          rip6_ctlinput,
  231         .pr_ctloutput =         rip6_ctloutput,
  232         .pr_fasttimo =          icmp6_fasttimo,
  233         .pr_slowtimo =          icmp6_slowtimo,
  234         .pr_usrreqs =           &rip6_usrreqs
  235 },
  236 {
  237         .pr_type =              SOCK_RAW,
  238         .pr_domain =            &inet6domain,
  239         .pr_protocol =          IPPROTO_DSTOPTS,
  240         .pr_flags =             PR_ATOMIC|PR_ADDR,
  241         .pr_input =             dest6_input,
  242         .pr_usrreqs =           &nousrreqs
  243 },
  244 {
  245         .pr_type =              SOCK_RAW,
  246         .pr_domain =            &inet6domain,
  247         .pr_protocol =          IPPROTO_ROUTING,
  248         .pr_flags =             PR_ATOMIC|PR_ADDR,
  249         .pr_input =             route6_input,
  250         .pr_usrreqs =           &nousrreqs
  251 },
  252 {
  253         .pr_type =              SOCK_RAW,
  254         .pr_domain =            &inet6domain,
  255         .pr_protocol =          IPPROTO_FRAGMENT,
  256         .pr_flags =             PR_ATOMIC|PR_ADDR,
  257         .pr_input =             frag6_input,
  258         .pr_usrreqs =           &nousrreqs
  259 },
  260 #ifdef IPSEC
  261 {
  262         .pr_type =              SOCK_RAW,
  263         .pr_domain =            &inet6domain,
  264         .pr_protocol =          IPPROTO_AH,
  265         .pr_flags =             PR_ATOMIC|PR_ADDR,
  266         .pr_input =             ipsec6_common_input,
  267         .pr_usrreqs =           &nousrreqs,
  268 },
  269 {
  270         .pr_type =              SOCK_RAW,
  271         .pr_domain =            &inet6domain,
  272         .pr_protocol =          IPPROTO_ESP,
  273         .pr_flags =             PR_ATOMIC|PR_ADDR,
  274         .pr_input =             ipsec6_common_input,
  275         .pr_ctlinput =          esp6_ctlinput,
  276         .pr_usrreqs =           &nousrreqs,
  277 },
  278 {
  279         .pr_type =              SOCK_RAW,
  280         .pr_domain =            &inet6domain,
  281         .pr_protocol =          IPPROTO_IPCOMP,
  282         .pr_flags =             PR_ATOMIC|PR_ADDR,
  283         .pr_input =             ipsec6_common_input,
  284         .pr_usrreqs =           &nousrreqs,
  285 },
  286 #endif /* IPSEC */
  287 #ifdef INET
  288 {
  289         .pr_type =              SOCK_RAW,
  290         .pr_domain =            &inet6domain,
  291         .pr_protocol =          IPPROTO_IPV4,
  292         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  293         .pr_input =             encap6_input,
  294         .pr_output =            rip6_output,
  295         .pr_ctloutput =         rip6_ctloutput,
  296         .pr_init =              encap_init,
  297         .pr_usrreqs =           &rip6_usrreqs
  298 },
  299 #endif /* INET */
  300 {
  301         .pr_type =              SOCK_RAW,
  302         .pr_domain =            &inet6domain,
  303         .pr_protocol =          IPPROTO_IPV6,
  304         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  305         .pr_input =             encap6_input,
  306         .pr_output =            rip6_output,
  307         .pr_ctloutput =         rip6_ctloutput,
  308         .pr_init =              encap_init,
  309         .pr_usrreqs =           &rip6_usrreqs
  310 },
  311 {
  312         .pr_type =              SOCK_RAW,
  313         .pr_domain =            &inet6domain,
  314         .pr_protocol =          IPPROTO_PIM,
  315         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  316         .pr_input =             encap6_input,
  317         .pr_output =            rip6_output,
  318         .pr_ctloutput =         rip6_ctloutput,
  319         .pr_usrreqs =           &rip6_usrreqs
  320 },
  321 /* Spacer n-times for loadable protocols. */
  322 IP6PROTOSPACER,
  323 IP6PROTOSPACER,
  324 IP6PROTOSPACER,
  325 IP6PROTOSPACER,
  326 IP6PROTOSPACER,
  327 IP6PROTOSPACER,
  328 IP6PROTOSPACER,
  329 IP6PROTOSPACER,
  330 /* raw wildcard */
  331 {
  332         .pr_type =              SOCK_RAW,
  333         .pr_domain =            &inet6domain,
  334         .pr_flags =             PR_ATOMIC|PR_ADDR,
  335         .pr_input =             rip6_input,
  336         .pr_output =            rip6_output,
  337         .pr_ctloutput =         rip6_ctloutput,
  338         .pr_usrreqs =           &rip6_usrreqs
  339 },
  340 };
  341 
  342 extern int in6_inithead(void **, int);
  343 #ifdef VIMAGE
  344 extern int in6_detachhead(void **, int);
  345 #endif
  346 
  347 struct domain inet6domain = {
  348         .dom_family =           AF_INET6,
  349         .dom_name =             "internet6",
  350         .dom_protosw =          (struct protosw *)inet6sw,
  351         .dom_protoswNPROTOSW =  (struct protosw *)
  352                                 &inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
  353 #ifdef RADIX_MPATH
  354         .dom_rtattach =         rn6_mpath_inithead,
  355 #else
  356         .dom_rtattach =         in6_inithead,
  357 #endif
  358 #ifdef VIMAGE
  359         .dom_rtdetach =         in6_detachhead,
  360 #endif
  361         .dom_rtoffset =         offsetof(struct sockaddr_in6, sin6_addr) << 3,
  362         .dom_maxrtkey =         sizeof(struct sockaddr_in6),
  363         .dom_ifattach =         in6_domifattach,
  364         .dom_ifdetach =         in6_domifdetach
  365 };
  366 
  367 VNET_DOMAIN_SET(inet6);
  368 
  369 /*
  370  * Internet configuration info
  371  */
  372 #ifndef IPV6FORWARDING
  373 #ifdef GATEWAY6
  374 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
  375 #else
  376 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
  377 #endif /* GATEWAY6 */
  378 #endif /* !IPV6FORWARDING */
  379 
  380 #ifndef IPV6_SENDREDIRECTS
  381 #define IPV6_SENDREDIRECTS      1
  382 #endif
  383 
  384 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING;      /* act as router? */
  385 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
  386 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
  387 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
  388 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
  389 VNET_DEFINE(int, ip6_maxfragpackets);   /* initialized in frag6.c:frag6_init() */
  390 VNET_DEFINE(int, ip6_maxfrags);         /* initialized in frag6.c:frag6_init() */
  391 VNET_DEFINE(int, ip6_log_interval) = 5;
  392 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
  393                                          * process? */
  394 VNET_DEFINE(int, ip6_dad_count) = 1;    /* DupAddrDetectionTransmits */
  395 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
  396 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
  397                                          * (RFC2462 5.5.4) */
  398 VNET_DEFINE(int, ip6_rr_prune) = 5;     /* router renumbering prefix
  399                                          * walk list every 5 sec. */
  400 VNET_DEFINE(int, ip6_mcast_pmtu) = 0;   /* enable pMTU discovery for multicast? */
  401 VNET_DEFINE(int, ip6_v6only) = 1;
  402 
  403 VNET_DEFINE(int, ip6_keepfaith) = 0;
  404 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
  405 #ifdef IPSTEALTH
  406 VNET_DEFINE(int, ip6stealth) = 0;
  407 #endif
  408 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
  409                                              * (RFC 4861) */
  410 
  411 /* icmp6 */
  412 /*
  413  * BSDI4 defines these variables in in_proto.c...
  414  * XXX: what if we don't define INET? Should we define pmtu6_expire
  415  * or so? (jinmei@kame.net 19990310)
  416  */
  417 VNET_DEFINE(int, pmtu_expire) = 60*10;
  418 VNET_DEFINE(int, pmtu_probe) = 60*2;
  419 
  420 /* raw IP6 parameters */
  421 /*
  422  * Nominal space allocated to a raw ip socket.
  423  */
  424 #define RIPV6SNDQ       8192
  425 #define RIPV6RCVQ       8192
  426 
  427 VNET_DEFINE(u_long, rip6_sendspace) = RIPV6SNDQ;
  428 VNET_DEFINE(u_long, rip6_recvspace) = RIPV6RCVQ;
  429 
  430 /* ICMPV6 parameters */
  431 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
  432 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
  433 VNET_DEFINE(int, icmp6errppslim) = 100;         /* 100pps */
  434 /* control how to respond to NI queries */
  435 VNET_DEFINE(int, icmp6_nodeinfo) =
  436     (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
  437 
  438 /* UDP on IP6 parameters */
  439 VNET_DEFINE(int, udp6_sendspace) = 9216;/* really max datagram size */
  440 VNET_DEFINE(int, udp6_recvspace) = 40 * (1024 + sizeof(struct sockaddr_in6));
  441                                         /* 40 1K datagrams */
  442 
  443 /*
  444  * sysctl related items.
  445  */
  446 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
  447         "Internet6 Family");
  448 
  449 /* net.inet6 */
  450 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
  451 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
  452 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
  453 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
  454 #ifdef SCTP
  455 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP,   sctp6,  CTLFLAG_RW, 0,  "SCTP6");
  456 #endif
  457 #ifdef IPSEC
  458 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
  459 #endif /* IPSEC */
  460 
  461 /* net.inet6.ip6 */
  462 static int
  463 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
  464 {
  465         int error = 0;
  466         int old;
  467 
  468         VNET_SYSCTL_ARG(req, arg1);
  469 
  470         error = SYSCTL_OUT(req, arg1, sizeof(int));
  471         if (error || !req->newptr)
  472                 return (error);
  473         old = V_ip6_temp_preferred_lifetime;
  474         error = SYSCTL_IN(req, arg1, sizeof(int));
  475         if (V_ip6_temp_preferred_lifetime <
  476             V_ip6_desync_factor + V_ip6_temp_regen_advance) {
  477                 V_ip6_temp_preferred_lifetime = old;
  478                 return (EINVAL);
  479         }
  480         return (error);
  481 }
  482 
  483 static int
  484 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
  485 {
  486         int error = 0;
  487         int old;
  488 
  489         VNET_SYSCTL_ARG(req, arg1);
  490 
  491         error = SYSCTL_OUT(req, arg1, sizeof(int));
  492         if (error || !req->newptr)
  493                 return (error);
  494         old = V_ip6_temp_valid_lifetime;
  495         error = SYSCTL_IN(req, arg1, sizeof(int));
  496         if (V_ip6_temp_valid_lifetime < V_ip6_temp_preferred_lifetime) {
  497                 V_ip6_temp_preferred_lifetime = old;
  498                 return (EINVAL);
  499         }
  500         return (error);
  501 }
  502 
  503 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
  504         &VNET_NAME(ip6_forwarding), 0, "");
  505 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
  506         &VNET_NAME(ip6_sendredirects), 0, "");
  507 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, CTLFLAG_RW,
  508         &VNET_NAME(ip6_defhlim), 0, "");
  509 SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD,
  510         &VNET_NAME(ip6stat), ip6stat, "");
  511 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
  512         CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0, "");
  513 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
  514         CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, "");
  515 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH, keepfaith, CTLFLAG_RW,
  516         &VNET_NAME(ip6_keepfaith), 0, "");
  517 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
  518         CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, "");
  519 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
  520         CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, "");
  521 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
  522         &VNET_NAME(ip6_dad_count), 0, "");
  523 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
  524         CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, "");
  525 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
  526         CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, "");
  527 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
  528         CTLFLAG_RD, __KAME_VERSION, 0, "");
  529 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
  530         CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, "");
  531 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, CTLFLAG_RW,
  532         &VNET_NAME(ip6_rr_prune), 0, "");
  533 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
  534         CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, "");
  535 SYSCTL_VNET_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
  536         CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_preferred_lifetime), 0,
  537         sysctl_ip6_temppltime, "I", "");
  538 SYSCTL_VNET_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
  539         CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_valid_lifetime), 0,
  540         sysctl_ip6_tempvltime, "I", "");
  541 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, CTLFLAG_RW,
  542         &VNET_NAME(ip6_v6only), 0, "");
  543 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
  544         CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, "");
  545 SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD,
  546         &VNET_NAME(rip6stat), rip6stat, "");
  547 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
  548         CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, "");
  549 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
  550         CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,"");
  551 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW,
  552         &VNET_NAME(ip6_maxfrags), 0, "");
  553 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, CTLFLAG_RW,
  554         &VNET_NAME(ip6_mcast_pmtu), 0, "");
  555 #ifdef IPSTEALTH
  556 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_RW,
  557         &VNET_NAME(ip6stealth), 0, "");
  558 #endif
  559 
  560 /* net.inet6.icmp6 */
  561 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
  562         CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, "");
  563 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
  564         CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, "");
  565 SYSCTL_VNET_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD,
  566         &VNET_NAME(icmp6stat), icmp6stat, "");
  567 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
  568         &VNET_NAME(nd6_prune), 0, "");
  569 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
  570         &VNET_NAME(nd6_delay), 0, "");
  571 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
  572         CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, "");
  573 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
  574         CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, "");
  575 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
  576         CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, "");
  577 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, CTLFLAG_RW,
  578         &VNET_NAME(icmp6_nodeinfo), 0, "");
  579 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
  580         CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, "");
  581 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
  582         CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, "");
  583 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
  584         &VNET_NAME(nd6_debug), 0, "");
  585 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
  586         nd6_onlink_ns_rfc4861, CTLFLAG_RW, &VNET_NAME(nd6_onlink_ns_rfc4861),
  587         0, "Accept 'on-link' nd6 NS in compliance with RFC 4861.");

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