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: releng/9.2/sys/netinet6/in6_proto.c 252021 2013-06-20 07:23:04Z hrs $");
   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 #include "opt_route.h"
   73 
   74 #include <sys/param.h>
   75 #include <sys/socket.h>
   76 #include <sys/socketvar.h>
   77 #include <sys/proc.h>
   78 #include <sys/protosw.h>
   79 #include <sys/jail.h>
   80 #include <sys/kernel.h>
   81 #include <sys/domain.h>
   82 #include <sys/mbuf.h>
   83 #include <sys/systm.h>
   84 #include <sys/sysctl.h>
   85 
   86 #include <net/if.h>
   87 #include <net/radix.h>
   88 #include <net/route.h>
   89 #ifdef RADIX_MPATH
   90 #include <net/radix_mpath.h>
   91 #endif
   92 
   93 #include <netinet/in.h>
   94 #include <netinet/in_systm.h>
   95 #include <netinet/in_var.h>
   96 #include <netinet/ip_encap.h>
   97 #include <netinet/ip.h>
   98 #include <netinet/ip_var.h>
   99 #include <netinet/ip6.h>
  100 #include <netinet6/ip6_var.h>
  101 #include <netinet/icmp6.h>
  102 
  103 #include <netinet/tcp.h>
  104 #include <netinet/tcp_timer.h>
  105 #include <netinet/tcp_var.h>
  106 #include <netinet/udp.h>
  107 #include <netinet/udp_var.h>
  108 #include <netinet6/tcp6_var.h>
  109 #include <netinet6/raw_ip6.h>
  110 #include <netinet6/udp6_var.h>
  111 #include <netinet6/pim6_var.h>
  112 #include <netinet6/nd6.h>
  113 
  114 #ifdef SCTP
  115 #include <netinet/in_pcb.h>
  116 #include <netinet/sctp_pcb.h>
  117 #include <netinet/sctp.h>
  118 #include <netinet/sctp_var.h>
  119 #include <netinet6/sctp6_var.h>
  120 #endif /* SCTP */
  121 
  122 #ifdef IPSEC
  123 #include <netipsec/ipsec.h>
  124 #include <netipsec/ipsec6.h>
  125 #endif /* IPSEC */
  126 
  127 #include <netinet6/ip6protosw.h>
  128 
  129 #ifdef FLOWTABLE
  130 #include <net/flowtable.h>
  131 #endif
  132 
  133 /*
  134  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
  135  */
  136 FEATURE(inet6, "Internet Protocol version 6");
  137 
  138 extern  struct domain inet6domain;
  139 static  struct pr_usrreqs nousrreqs;
  140 
  141 #define PR_LISTEN       0
  142 #define PR_ABRTACPTDIS  0
  143 
  144 /* Spacer for loadable protocols. */
  145 #define IP6PROTOSPACER                          \
  146 {                                               \
  147         .pr_domain =            &inet6domain,   \
  148         .pr_protocol =          PROTO_SPACER,   \
  149         .pr_usrreqs =           &nousrreqs      \
  150 }
  151 
  152 struct ip6protosw inet6sw[] = {
  153 {
  154         .pr_type =              0,
  155         .pr_domain =            &inet6domain,
  156         .pr_protocol =          IPPROTO_IPV6,
  157         .pr_init =              ip6_init,
  158 #ifdef VIMAGE
  159         .pr_destroy =           ip6_destroy,
  160 #endif
  161         .pr_slowtimo =          frag6_slowtimo,
  162         .pr_drain =             frag6_drain,
  163         .pr_usrreqs =           &nousrreqs,
  164 },
  165 {
  166         .pr_type =              SOCK_DGRAM,
  167         .pr_domain =            &inet6domain,
  168         .pr_protocol =          IPPROTO_UDP,
  169         .pr_flags =             PR_ATOMIC|PR_ADDR,
  170         .pr_input =             udp6_input,
  171         .pr_ctlinput =          udp6_ctlinput,
  172         .pr_ctloutput =         ip6_ctloutput,
  173 #ifndef INET    /* Do not call initialization twice. */
  174         .pr_init =              udp_init,
  175 #endif
  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_input =             tcp6_input,
  184         .pr_ctlinput =          tcp6_ctlinput,
  185         .pr_ctloutput =         tcp_ctloutput,
  186 #ifndef INET    /* don't call initialization and timeout routines twice */
  187         .pr_init =              tcp_init,
  188         .pr_slowtimo =          tcp_slowtimo,
  189 #endif
  190         .pr_drain =             tcp_drain,
  191         .pr_usrreqs =           &tcp6_usrreqs,
  192 },
  193 #ifdef SCTP
  194 {
  195         .pr_type =              SOCK_SEQPACKET,
  196         .pr_domain =            &inet6domain,
  197         .pr_protocol =          IPPROTO_SCTP,
  198         .pr_flags =             PR_WANTRCVD,
  199         .pr_input =             sctp6_input,
  200         .pr_ctlinput =          sctp6_ctlinput,
  201         .pr_ctloutput = sctp_ctloutput,
  202         .pr_drain =             sctp_drain,
  203 #ifndef INET    /* Do not call initialization twice. */
  204         .pr_init =              sctp_init,
  205 #endif
  206         .pr_usrreqs =           &sctp6_usrreqs
  207 },
  208 {
  209         .pr_type =              SOCK_STREAM,
  210         .pr_domain =            &inet6domain,
  211         .pr_protocol =          IPPROTO_SCTP,
  212         .pr_flags =             PR_WANTRCVD,
  213         .pr_input =             sctp6_input,
  214         .pr_ctlinput =  sctp6_ctlinput,
  215         .pr_ctloutput =         sctp_ctloutput,
  216         .pr_drain =             sctp_drain,
  217         .pr_usrreqs =           &sctp6_usrreqs
  218 },
  219 #endif /* SCTP */
  220 {
  221         .pr_type =              SOCK_RAW,
  222         .pr_domain =            &inet6domain,
  223         .pr_protocol =          IPPROTO_RAW,
  224         .pr_flags =             PR_ATOMIC|PR_ADDR,
  225         .pr_input =             rip6_input,
  226         .pr_output =            rip6_output,
  227         .pr_ctlinput =          rip6_ctlinput,
  228         .pr_ctloutput =         rip6_ctloutput,
  229 #ifndef INET    /* Do not call initialization twice. */
  230         .pr_init =              rip_init,
  231 #endif
  232         .pr_usrreqs =           &rip6_usrreqs
  233 },
  234 {
  235         .pr_type =              SOCK_RAW,
  236         .pr_domain =            &inet6domain,
  237         .pr_protocol =          IPPROTO_ICMPV6,
  238         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  239         .pr_input =             icmp6_input,
  240         .pr_output =            rip6_output,
  241         .pr_ctlinput =          rip6_ctlinput,
  242         .pr_ctloutput =         rip6_ctloutput,
  243         .pr_fasttimo =          icmp6_fasttimo,
  244         .pr_slowtimo =          icmp6_slowtimo,
  245         .pr_usrreqs =           &rip6_usrreqs
  246 },
  247 {
  248         .pr_type =              SOCK_RAW,
  249         .pr_domain =            &inet6domain,
  250         .pr_protocol =          IPPROTO_DSTOPTS,
  251         .pr_flags =             PR_ATOMIC|PR_ADDR,
  252         .pr_input =             dest6_input,
  253         .pr_usrreqs =           &nousrreqs
  254 },
  255 {
  256         .pr_type =              SOCK_RAW,
  257         .pr_domain =            &inet6domain,
  258         .pr_protocol =          IPPROTO_ROUTING,
  259         .pr_flags =             PR_ATOMIC|PR_ADDR,
  260         .pr_input =             route6_input,
  261         .pr_usrreqs =           &nousrreqs
  262 },
  263 {
  264         .pr_type =              SOCK_RAW,
  265         .pr_domain =            &inet6domain,
  266         .pr_protocol =          IPPROTO_FRAGMENT,
  267         .pr_flags =             PR_ATOMIC|PR_ADDR,
  268         .pr_input =             frag6_input,
  269         .pr_usrreqs =           &nousrreqs
  270 },
  271 #ifdef IPSEC
  272 {
  273         .pr_type =              SOCK_RAW,
  274         .pr_domain =            &inet6domain,
  275         .pr_protocol =          IPPROTO_AH,
  276         .pr_flags =             PR_ATOMIC|PR_ADDR,
  277         .pr_input =             ipsec6_common_input,
  278         .pr_usrreqs =           &nousrreqs,
  279 },
  280 {
  281         .pr_type =              SOCK_RAW,
  282         .pr_domain =            &inet6domain,
  283         .pr_protocol =          IPPROTO_ESP,
  284         .pr_flags =             PR_ATOMIC|PR_ADDR,
  285         .pr_input =             ipsec6_common_input,
  286         .pr_ctlinput =          esp6_ctlinput,
  287         .pr_usrreqs =           &nousrreqs,
  288 },
  289 {
  290         .pr_type =              SOCK_RAW,
  291         .pr_domain =            &inet6domain,
  292         .pr_protocol =          IPPROTO_IPCOMP,
  293         .pr_flags =             PR_ATOMIC|PR_ADDR,
  294         .pr_input =             ipsec6_common_input,
  295         .pr_usrreqs =           &nousrreqs,
  296 },
  297 #endif /* IPSEC */
  298 #ifdef INET
  299 {
  300         .pr_type =              SOCK_RAW,
  301         .pr_domain =            &inet6domain,
  302         .pr_protocol =          IPPROTO_IPV4,
  303         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  304         .pr_input =             encap6_input,
  305         .pr_output =            rip6_output,
  306         .pr_ctloutput =         rip6_ctloutput,
  307         .pr_init =              encap_init,
  308         .pr_usrreqs =           &rip6_usrreqs
  309 },
  310 #endif /* INET */
  311 {
  312         .pr_type =              SOCK_RAW,
  313         .pr_domain =            &inet6domain,
  314         .pr_protocol =          IPPROTO_IPV6,
  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_init =              encap_init,
  320         .pr_usrreqs =           &rip6_usrreqs
  321 },
  322 {
  323         .pr_type =              SOCK_RAW,
  324         .pr_domain =            &inet6domain,
  325         .pr_protocol =          IPPROTO_PIM,
  326         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  327         .pr_input =             encap6_input,
  328         .pr_output =            rip6_output,
  329         .pr_ctloutput =         rip6_ctloutput,
  330         .pr_usrreqs =           &rip6_usrreqs
  331 },
  332 /* Spacer n-times for loadable protocols. */
  333 IP6PROTOSPACER,
  334 IP6PROTOSPACER,
  335 IP6PROTOSPACER,
  336 IP6PROTOSPACER,
  337 IP6PROTOSPACER,
  338 IP6PROTOSPACER,
  339 IP6PROTOSPACER,
  340 IP6PROTOSPACER,
  341 /* raw wildcard */
  342 {
  343         .pr_type =              SOCK_RAW,
  344         .pr_domain =            &inet6domain,
  345         .pr_flags =             PR_ATOMIC|PR_ADDR,
  346         .pr_input =             rip6_input,
  347         .pr_output =            rip6_output,
  348         .pr_ctloutput =         rip6_ctloutput,
  349         .pr_usrreqs =           &rip6_usrreqs
  350 },
  351 };
  352 
  353 extern int in6_inithead(void **, int);
  354 #ifdef VIMAGE
  355 extern int in6_detachhead(void **, int);
  356 #endif
  357 
  358 struct domain inet6domain = {
  359         .dom_family =           AF_INET6,
  360         .dom_name =             "internet6",
  361         .dom_protosw =          (struct protosw *)inet6sw,
  362         .dom_protoswNPROTOSW =  (struct protosw *)
  363                                 &inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])],
  364 #ifdef RADIX_MPATH
  365         .dom_rtattach =         rn6_mpath_inithead,
  366 #else
  367         .dom_rtattach =         in6_inithead,
  368 #endif
  369 #ifdef VIMAGE
  370         .dom_rtdetach =         in6_detachhead,
  371 #endif
  372         .dom_rtoffset =         offsetof(struct sockaddr_in6, sin6_addr) << 3,
  373         .dom_maxrtkey =         sizeof(struct sockaddr_in6),
  374         .dom_ifattach =         in6_domifattach,
  375         .dom_ifdetach =         in6_domifdetach
  376 };
  377 
  378 VNET_DOMAIN_SET(inet6);
  379 
  380 /*
  381  * Internet configuration info
  382  */
  383 #ifndef IPV6FORWARDING
  384 #ifdef GATEWAY6
  385 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
  386 #else
  387 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
  388 #endif /* GATEWAY6 */
  389 #endif /* !IPV6FORWARDING */
  390 
  391 #ifndef IPV6_SENDREDIRECTS
  392 #define IPV6_SENDREDIRECTS      1
  393 #endif
  394 
  395 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING;      /* act as router? */
  396 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
  397 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
  398 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
  399 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
  400 VNET_DEFINE(int, ip6_no_radr) = 0;
  401 VNET_DEFINE(int, ip6_norbit_raif) = 0;
  402 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
  403 VNET_DEFINE(int, ip6_maxfragpackets);   /* initialized in frag6.c:frag6_init() */
  404 VNET_DEFINE(int, ip6_maxfrags);         /* initialized in frag6.c:frag6_init() */
  405 VNET_DEFINE(int, ip6_log_interval) = 5;
  406 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
  407                                          * process? */
  408 VNET_DEFINE(int, ip6_dad_count) = 1;    /* DupAddrDetectionTransmits */
  409 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
  410 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
  411                                          * (RFC2462 5.5.4) */
  412 VNET_DEFINE(int, ip6_rr_prune) = 5;     /* router renumbering prefix
  413                                          * walk list every 5 sec. */
  414 VNET_DEFINE(int, ip6_mcast_pmtu) = 0;   /* enable pMTU discovery for multicast? */
  415 VNET_DEFINE(int, ip6_v6only) = 1;
  416 
  417 VNET_DEFINE(int, ip6_keepfaith) = 0;
  418 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
  419 #ifdef IPSTEALTH
  420 VNET_DEFINE(int, ip6stealth) = 0;
  421 #endif
  422 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
  423                                              * (RFC 4861) */
  424 
  425 /* icmp6 */
  426 /*
  427  * BSDI4 defines these variables in in_proto.c...
  428  * XXX: what if we don't define INET? Should we define pmtu6_expire
  429  * or so? (jinmei@kame.net 19990310)
  430  */
  431 VNET_DEFINE(int, pmtu_expire) = 60*10;
  432 VNET_DEFINE(int, pmtu_probe) = 60*2;
  433 
  434 /* raw IP6 parameters */
  435 /*
  436  * Nominal space allocated to a raw ip socket.
  437  */
  438 #define RIPV6SNDQ       8192
  439 #define RIPV6RCVQ       8192
  440 
  441 VNET_DEFINE(u_long, rip6_sendspace) = RIPV6SNDQ;
  442 VNET_DEFINE(u_long, rip6_recvspace) = RIPV6RCVQ;
  443 
  444 /* ICMPV6 parameters */
  445 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
  446 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
  447 VNET_DEFINE(int, icmp6errppslim) = 100;         /* 100pps */
  448 /* control how to respond to NI queries */
  449 VNET_DEFINE(int, icmp6_nodeinfo) =
  450     (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
  451 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
  452 
  453 /* UDP on IP6 parameters */
  454 VNET_DEFINE(int, udp6_sendspace) = 9216;/* really max datagram size */
  455 VNET_DEFINE(int, udp6_recvspace) = 40 * (1024 + sizeof(struct sockaddr_in6));
  456                                         /* 40 1K datagrams */
  457 
  458 /*
  459  * sysctl related items.
  460  */
  461 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
  462         "Internet6 Family");
  463 
  464 /* net.inet6 */
  465 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
  466 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
  467 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
  468 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
  469 #ifdef SCTP
  470 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP,   sctp6,  CTLFLAG_RW, 0,  "SCTP6");
  471 #endif
  472 #ifdef IPSEC
  473 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
  474 #endif /* IPSEC */
  475 
  476 /* net.inet6.ip6 */
  477 static int
  478 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
  479 {
  480         int error = 0;
  481         int old;
  482 
  483         VNET_SYSCTL_ARG(req, arg1);
  484 
  485         error = SYSCTL_OUT(req, arg1, sizeof(int));
  486         if (error || !req->newptr)
  487                 return (error);
  488         old = V_ip6_temp_preferred_lifetime;
  489         error = SYSCTL_IN(req, arg1, sizeof(int));
  490         if (V_ip6_temp_preferred_lifetime <
  491             V_ip6_desync_factor + V_ip6_temp_regen_advance) {
  492                 V_ip6_temp_preferred_lifetime = old;
  493                 return (EINVAL);
  494         }
  495         return (error);
  496 }
  497 
  498 static int
  499 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
  500 {
  501         int error = 0;
  502         int old;
  503 
  504         VNET_SYSCTL_ARG(req, arg1);
  505 
  506         error = SYSCTL_OUT(req, arg1, sizeof(int));
  507         if (error || !req->newptr)
  508                 return (error);
  509         old = V_ip6_temp_valid_lifetime;
  510         error = SYSCTL_IN(req, arg1, sizeof(int));
  511         if (V_ip6_temp_valid_lifetime < V_ip6_temp_preferred_lifetime) {
  512                 V_ip6_temp_preferred_lifetime = old;
  513                 return (EINVAL);
  514         }
  515         return (error);
  516 }
  517 
  518 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
  519         &VNET_NAME(ip6_forwarding), 0, "");
  520 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
  521         &VNET_NAME(ip6_sendredirects), 0, "");
  522 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, CTLFLAG_RW,
  523         &VNET_NAME(ip6_defhlim), 0, "");
  524 SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RW,
  525         &VNET_NAME(ip6stat), ip6stat, "");
  526 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
  527         CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0, "");
  528 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
  529         CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
  530         "Default value of per-interface flag for accepting ICMPv6 Router"
  531         "Advertisement messages");
  532 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
  533         CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
  534         "Default value of per-interface flag to control whether routers "
  535         "sending ICMPv6 RA messages on that interface are added into the "
  536         "default router list.");
  537 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, CTLFLAG_RW,
  538         &VNET_NAME(ip6_norbit_raif), 0,
  539         "Always set 0 to R flag in ICMPv6 NA messages when accepting RA"
  540         " on the interface.");
  541 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
  542         CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
  543         "Accept the default router list from ICMPv6 RA messages even "
  544         "when packet forwarding enabled.");
  545 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH, keepfaith, CTLFLAG_RW,
  546         &VNET_NAME(ip6_keepfaith), 0, "");
  547 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
  548         CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, "");
  549 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
  550         CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, "");
  551 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
  552         &VNET_NAME(ip6_dad_count), 0, "");
  553 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
  554         CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, "");
  555 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
  556         CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, "");
  557 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
  558         CTLFLAG_RD, __KAME_VERSION, 0, "");
  559 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
  560         CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, "");
  561 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, CTLFLAG_RW,
  562         &VNET_NAME(ip6_rr_prune), 0, "");
  563 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
  564         CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, "");
  565 SYSCTL_VNET_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
  566         CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_preferred_lifetime), 0,
  567         sysctl_ip6_temppltime, "I", "");
  568 SYSCTL_VNET_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
  569         CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_valid_lifetime), 0,
  570         sysctl_ip6_tempvltime, "I", "");
  571 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, CTLFLAG_RW,
  572         &VNET_NAME(ip6_v6only), 0, "");
  573 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
  574         CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
  575         "Default value of per-interface flag for automatically adding an IPv6"
  576         " link-local address to interfaces when attached");
  577 SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RW,
  578         &VNET_NAME(rip6stat), rip6stat, "");
  579 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
  580         CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, "");
  581 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
  582         CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,"");
  583 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW,
  584         &VNET_NAME(ip6_maxfrags), 0, "");
  585 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, CTLFLAG_RW,
  586         &VNET_NAME(ip6_mcast_pmtu), 0, "");
  587 #ifdef IPSTEALTH
  588 SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_RW,
  589         &VNET_NAME(ip6stealth), 0, "");
  590 #endif
  591 
  592 #ifdef FLOWTABLE
  593 VNET_DEFINE(int, ip6_output_flowtable_size) = 2048;
  594 VNET_DEFINE(struct flowtable *, ip6_ft);
  595 #define V_ip6_output_flowtable_size     VNET(ip6_output_flowtable_size)
  596 
  597 SYSCTL_VNET_INT(_net_inet6_ip6, OID_AUTO, output_flowtable_size, CTLFLAG_RDTUN,
  598     &VNET_NAME(ip6_output_flowtable_size), 2048,
  599     "number of entries in the per-cpu output flow caches");
  600 #endif
  601 
  602 /* net.inet6.icmp6 */
  603 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
  604         CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, "");
  605 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
  606         CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, "");
  607 SYSCTL_VNET_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RW,
  608         &VNET_NAME(icmp6stat), icmp6stat, "");
  609 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
  610         &VNET_NAME(nd6_prune), 0, "");
  611 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
  612         &VNET_NAME(nd6_delay), 0, "");
  613 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
  614         CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, "");
  615 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
  616         CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, "");
  617 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
  618         CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, "");
  619 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, CTLFLAG_RW,
  620         &VNET_NAME(icmp6_nodeinfo), 0, "");
  621 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
  622         nodeinfo_oldmcprefix, CTLFLAG_RW,
  623         &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 
  624         "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup"
  625         " for compatibility with KAME implememtation.");
  626 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
  627         CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, "");
  628 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
  629         CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, "");
  630 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
  631         &VNET_NAME(nd6_debug), 0, "");
  632 SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
  633         nd6_onlink_ns_rfc4861, CTLFLAG_RW, &VNET_NAME(nd6_onlink_ns_rfc4861),
  634         0, "Accept 'on-link' nd6 NS in compliance with RFC 4861.");

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