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/11.0/sys/netinet6/in6_proto.c 301114 2016-06-01 10:14:04Z bz $");
   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/malloc.h>
   82 #include <sys/domain.h>
   83 #include <sys/mbuf.h>
   84 #include <sys/systm.h>
   85 #include <sys/sysctl.h>
   86 
   87 #include <net/if.h>
   88 #include <net/if_var.h>
   89 #include <net/radix.h>
   90 #include <net/route.h>
   91 #ifdef RADIX_MPATH
   92 #include <net/radix_mpath.h>
   93 #endif
   94 
   95 #include <netinet/in.h>
   96 #include <netinet/in_systm.h>
   97 #include <netinet/in_var.h>
   98 #include <netinet/ip_encap.h>
   99 #include <netinet/ip.h>
  100 #include <netinet/ip_var.h>
  101 #include <netinet/ip6.h>
  102 #include <netinet6/ip6_var.h>
  103 #include <netinet/icmp6.h>
  104 
  105 #include <netinet/tcp.h>
  106 #include <netinet/tcp_timer.h>
  107 #include <netinet/tcp_var.h>
  108 #include <netinet/udp.h>
  109 #include <netinet/udp_var.h>
  110 #include <netinet6/tcp6_var.h>
  111 #include <netinet6/raw_ip6.h>
  112 #include <netinet6/udp6_var.h>
  113 #include <netinet6/pim6_var.h>
  114 #include <netinet6/nd6.h>
  115 
  116 #ifdef SCTP
  117 #include <netinet/in_pcb.h>
  118 #include <netinet/sctp_pcb.h>
  119 #include <netinet/sctp.h>
  120 #include <netinet/sctp_var.h>
  121 #include <netinet6/sctp6_var.h>
  122 #endif /* SCTP */
  123 
  124 #ifdef IPSEC
  125 #include <netipsec/ipsec.h>
  126 #include <netipsec/ipsec6.h>
  127 #endif /* IPSEC */
  128 
  129 #include <netinet6/ip6protosw.h>
  130 
  131 /*
  132  * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
  133  */
  134 FEATURE(inet6, "Internet Protocol version 6");
  135 
  136 extern  struct domain inet6domain;
  137 static  struct pr_usrreqs nousrreqs;
  138 
  139 #define PR_LISTEN       0
  140 #define PR_ABRTACPTDIS  0
  141 
  142 /* Spacer for loadable protocols. */
  143 #define IP6PROTOSPACER                          \
  144 {                                               \
  145         .pr_domain =            &inet6domain,   \
  146         .pr_protocol =          PROTO_SPACER,   \
  147         .pr_usrreqs =           &nousrreqs      \
  148 }
  149 
  150 struct protosw inet6sw[] = {
  151 {
  152         .pr_type =              0,
  153         .pr_domain =            &inet6domain,
  154         .pr_protocol =          IPPROTO_IPV6,
  155         .pr_init =              ip6_init,
  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 #ifndef INET    /* Do not call initialization twice. */
  169         .pr_init =              udp_init,
  170 #endif
  171         .pr_usrreqs =           &udp6_usrreqs,
  172 },
  173 {
  174         .pr_type =              SOCK_STREAM,
  175         .pr_domain =            &inet6domain,
  176         .pr_protocol =          IPPROTO_TCP,
  177         .pr_flags =             PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN,
  178         .pr_input =             tcp6_input,
  179         .pr_ctlinput =          tcp6_ctlinput,
  180         .pr_ctloutput =         tcp_ctloutput,
  181 #ifndef INET    /* don't call initialization and timeout routines twice */
  182         .pr_init =              tcp_init,
  183         .pr_slowtimo =          tcp_slowtimo,
  184 #endif
  185         .pr_drain =             tcp_drain,
  186         .pr_usrreqs =           &tcp6_usrreqs,
  187 },
  188 #ifdef SCTP
  189 {
  190         .pr_type =              SOCK_SEQPACKET,
  191         .pr_domain =            &inet6domain,
  192         .pr_protocol =          IPPROTO_SCTP,
  193         .pr_flags =             PR_WANTRCVD,
  194         .pr_input =             sctp6_input,
  195         .pr_ctlinput =          sctp6_ctlinput,
  196         .pr_ctloutput = sctp_ctloutput,
  197         .pr_drain =             sctp_drain,
  198 #ifndef INET    /* Do not call initialization twice. */
  199         .pr_init =              sctp_init,
  200 #endif
  201         .pr_usrreqs =           &sctp6_usrreqs
  202 },
  203 {
  204         .pr_type =              SOCK_STREAM,
  205         .pr_domain =            &inet6domain,
  206         .pr_protocol =          IPPROTO_SCTP,
  207         .pr_flags =             PR_CONNREQUIRED|PR_WANTRCVD,
  208         .pr_input =             sctp6_input,
  209         .pr_ctlinput =          sctp6_ctlinput,
  210         .pr_ctloutput =         sctp_ctloutput,
  211         .pr_drain =             sctp_drain,
  212         .pr_usrreqs =           &sctp6_usrreqs
  213 },
  214 #endif /* SCTP */
  215 {
  216         .pr_type =              SOCK_DGRAM,
  217         .pr_domain =            &inet6domain,
  218         .pr_protocol =          IPPROTO_UDPLITE,
  219         .pr_flags =             PR_ATOMIC|PR_ADDR,
  220         .pr_input =             udp6_input,
  221         .pr_ctlinput =          udplite6_ctlinput,
  222         .pr_ctloutput =         udp_ctloutput,
  223 #ifndef INET    /* Do not call initialization twice. */
  224         .pr_init =              udplite_init,
  225 #endif
  226         .pr_usrreqs =           &udp6_usrreqs,
  227 },
  228 {
  229         .pr_type =              SOCK_RAW,
  230         .pr_domain =            &inet6domain,
  231         .pr_protocol =          IPPROTO_RAW,
  232         .pr_flags =             PR_ATOMIC|PR_ADDR,
  233         .pr_input =             rip6_input,
  234         .pr_output =            rip6_output,
  235         .pr_ctlinput =          rip6_ctlinput,
  236         .pr_ctloutput =         rip6_ctloutput,
  237 #ifndef INET    /* Do not call initialization twice. */
  238         .pr_init =              rip_init,
  239 #endif
  240         .pr_usrreqs =           &rip6_usrreqs
  241 },
  242 {
  243         .pr_type =              SOCK_RAW,
  244         .pr_domain =            &inet6domain,
  245         .pr_protocol =          IPPROTO_ICMPV6,
  246         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  247         .pr_input =             icmp6_input,
  248         .pr_output =            rip6_output,
  249         .pr_ctlinput =          rip6_ctlinput,
  250         .pr_ctloutput =         rip6_ctloutput,
  251         .pr_fasttimo =          icmp6_fasttimo,
  252         .pr_slowtimo =          icmp6_slowtimo,
  253         .pr_usrreqs =           &rip6_usrreqs
  254 },
  255 {
  256         .pr_type =              SOCK_RAW,
  257         .pr_domain =            &inet6domain,
  258         .pr_protocol =          IPPROTO_DSTOPTS,
  259         .pr_flags =             PR_ATOMIC|PR_ADDR,
  260         .pr_input =             dest6_input,
  261         .pr_usrreqs =           &nousrreqs
  262 },
  263 {
  264         .pr_type =              SOCK_RAW,
  265         .pr_domain =            &inet6domain,
  266         .pr_protocol =          IPPROTO_ROUTING,
  267         .pr_flags =             PR_ATOMIC|PR_ADDR,
  268         .pr_input =             route6_input,
  269         .pr_usrreqs =           &nousrreqs
  270 },
  271 {
  272         .pr_type =              SOCK_RAW,
  273         .pr_domain =            &inet6domain,
  274         .pr_protocol =          IPPROTO_FRAGMENT,
  275         .pr_flags =             PR_ATOMIC|PR_ADDR,
  276         .pr_input =             frag6_input,
  277         .pr_usrreqs =           &nousrreqs
  278 },
  279 #ifdef IPSEC
  280 {
  281         .pr_type =              SOCK_RAW,
  282         .pr_domain =            &inet6domain,
  283         .pr_protocol =          IPPROTO_AH,
  284         .pr_flags =             PR_ATOMIC|PR_ADDR,
  285         .pr_input =             ipsec6_common_input,
  286         .pr_usrreqs =           &nousrreqs,
  287 },
  288 {
  289         .pr_type =              SOCK_RAW,
  290         .pr_domain =            &inet6domain,
  291         .pr_protocol =          IPPROTO_ESP,
  292         .pr_flags =             PR_ATOMIC|PR_ADDR,
  293         .pr_input =             ipsec6_common_input,
  294         .pr_ctlinput =          esp6_ctlinput,
  295         .pr_usrreqs =           &nousrreqs,
  296 },
  297 {
  298         .pr_type =              SOCK_RAW,
  299         .pr_domain =            &inet6domain,
  300         .pr_protocol =          IPPROTO_IPCOMP,
  301         .pr_flags =             PR_ATOMIC|PR_ADDR,
  302         .pr_input =             ipsec6_common_input,
  303         .pr_usrreqs =           &nousrreqs,
  304 },
  305 #endif /* IPSEC */
  306 #ifdef INET
  307 {
  308         .pr_type =              SOCK_RAW,
  309         .pr_domain =            &inet6domain,
  310         .pr_protocol =          IPPROTO_IPV4,
  311         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  312         .pr_input =             encap6_input,
  313         .pr_output =            rip6_output,
  314         .pr_ctloutput =         rip6_ctloutput,
  315         .pr_init =              encap_init,
  316         .pr_usrreqs =           &rip6_usrreqs
  317 },
  318 #endif /* INET */
  319 {
  320         .pr_type =              SOCK_RAW,
  321         .pr_domain =            &inet6domain,
  322         .pr_protocol =          IPPROTO_IPV6,
  323         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  324         .pr_input =             encap6_input,
  325         .pr_output =            rip6_output,
  326         .pr_ctloutput =         rip6_ctloutput,
  327         .pr_init =              encap_init,
  328         .pr_usrreqs =           &rip6_usrreqs
  329 },
  330 {
  331         .pr_type =              SOCK_RAW,
  332         .pr_domain =            &inet6domain,
  333         .pr_protocol =          IPPROTO_GRE,
  334         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  335         .pr_input =             encap6_input,
  336         .pr_output =            rip6_output,
  337         .pr_ctloutput =         rip6_ctloutput,
  338         .pr_init =              encap_init,
  339         .pr_usrreqs =           &rip6_usrreqs
  340 },
  341 {
  342         .pr_type =              SOCK_RAW,
  343         .pr_domain =            &inet6domain,
  344         .pr_protocol =          IPPROTO_PIM,
  345         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  346         .pr_input =             encap6_input,
  347         .pr_output =            rip6_output,
  348         .pr_ctloutput =         rip6_ctloutput,
  349         .pr_usrreqs =           &rip6_usrreqs
  350 },
  351 /* Spacer n-times for loadable protocols. */
  352 IP6PROTOSPACER,
  353 IP6PROTOSPACER,
  354 IP6PROTOSPACER,
  355 IP6PROTOSPACER,
  356 IP6PROTOSPACER,
  357 IP6PROTOSPACER,
  358 IP6PROTOSPACER,
  359 IP6PROTOSPACER,
  360 /* raw wildcard */
  361 {
  362         .pr_type =              SOCK_RAW,
  363         .pr_domain =            &inet6domain,
  364         .pr_flags =             PR_ATOMIC|PR_ADDR,
  365         .pr_input =             rip6_input,
  366         .pr_output =            rip6_output,
  367         .pr_ctloutput =         rip6_ctloutput,
  368         .pr_usrreqs =           &rip6_usrreqs
  369 },
  370 };
  371 
  372 extern int in6_inithead(void **, int);
  373 #ifdef VIMAGE
  374 extern int in6_detachhead(void **, int);
  375 #endif
  376 
  377 struct domain inet6domain = {
  378         .dom_family =           AF_INET6,
  379         .dom_name =             "internet6",
  380         .dom_protosw =          (struct protosw *)inet6sw,
  381         .dom_protoswNPROTOSW =  (struct protosw *)&inet6sw[nitems(inet6sw)],
  382 #ifdef RADIX_MPATH
  383         .dom_rtattach =         rn6_mpath_inithead,
  384 #else
  385         .dom_rtattach =         in6_inithead,
  386 #endif
  387 #ifdef VIMAGE
  388         .dom_rtdetach =         in6_detachhead,
  389 #endif
  390         .dom_ifattach =         in6_domifattach,
  391         .dom_ifdetach =         in6_domifdetach,
  392         .dom_ifmtu    =         in6_domifmtu
  393 };
  394 
  395 VNET_DOMAIN_SET(inet6);
  396 
  397 /*
  398  * Internet configuration info
  399  */
  400 #ifndef IPV6FORWARDING
  401 #ifdef GATEWAY6
  402 #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
  403 #else
  404 #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
  405 #endif /* GATEWAY6 */
  406 #endif /* !IPV6FORWARDING */
  407 
  408 #ifndef IPV6_SENDREDIRECTS
  409 #define IPV6_SENDREDIRECTS      1
  410 #endif
  411 
  412 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING;      /* act as router? */
  413 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
  414 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
  415 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
  416 VNET_DEFINE(int, ip6_accept_rtadv) = 0;
  417 VNET_DEFINE(int, ip6_no_radr) = 0;
  418 VNET_DEFINE(int, ip6_norbit_raif) = 0;
  419 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
  420 VNET_DEFINE(int, ip6_maxfragpackets);   /* initialized in frag6.c:frag6_init() */
  421 VNET_DEFINE(int, ip6_maxfrags);         /* initialized in frag6.c:frag6_init() */
  422 VNET_DEFINE(int, ip6_log_interval) = 5;
  423 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we
  424                                          * process? */
  425 VNET_DEFINE(int, ip6_dad_count) = 1;    /* DupAddrDetectionTransmits */
  426 VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
  427 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
  428                                          * (RFC2462 5.5.4) */
  429 VNET_DEFINE(int, ip6_rr_prune) = 5;     /* router renumbering prefix
  430                                          * walk list every 5 sec. */
  431 VNET_DEFINE(int, ip6_mcast_pmtu) = 0;   /* enable pMTU discovery for multicast? */
  432 VNET_DEFINE(int, ip6_v6only) = 1;
  433 
  434 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;
  435 #ifdef IPSTEALTH
  436 VNET_DEFINE(int, ip6stealth) = 0;
  437 #endif
  438 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS
  439                                              * (RFC 4861) */
  440 
  441 /* icmp6 */
  442 /*
  443  * BSDI4 defines these variables in in_proto.c...
  444  * XXX: what if we don't define INET? Should we define pmtu6_expire
  445  * or so? (jinmei@kame.net 19990310)
  446  */
  447 VNET_DEFINE(int, pmtu_expire) = 60*10;
  448 VNET_DEFINE(int, pmtu_probe) = 60*2;
  449 
  450 /* ICMPV6 parameters */
  451 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
  452 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
  453 VNET_DEFINE(int, icmp6errppslim) = 100;         /* 100pps */
  454 /* control how to respond to NI queries */
  455 VNET_DEFINE(int, icmp6_nodeinfo) =
  456     (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
  457 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1;
  458 
  459 /*
  460  * sysctl related items.
  461  */
  462 SYSCTL_NODE(_net,       PF_INET6,       inet6,  CTLFLAG_RW,     0,
  463         "Internet6 Family");
  464 
  465 /* net.inet6 */
  466 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6,   ip6,    CTLFLAG_RW, 0,  "IP6");
  467 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6,  CTLFLAG_RW, 0,  "ICMP6");
  468 SYSCTL_NODE(_net_inet6, IPPROTO_UDP,    udp6,   CTLFLAG_RW, 0,  "UDP6");
  469 SYSCTL_NODE(_net_inet6, IPPROTO_TCP,    tcp6,   CTLFLAG_RW, 0,  "TCP6");
  470 #ifdef SCTP
  471 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP,   sctp6,  CTLFLAG_RW, 0,  "SCTP6");
  472 #endif
  473 #ifdef IPSEC
  474 SYSCTL_NODE(_net_inet6, IPPROTO_ESP,    ipsec6, CTLFLAG_RW, 0,  "IPSEC6");
  475 #endif /* IPSEC */
  476 
  477 /* net.inet6.ip6 */
  478 static int
  479 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS)
  480 {
  481         int error, val;
  482 
  483         val = V_ip6_temp_preferred_lifetime;
  484         error = sysctl_handle_int(oidp, &val, 0, req);
  485         if (error != 0 || !req->newptr)
  486                 return (error);
  487         if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance)
  488                 return (EINVAL);
  489         V_ip6_temp_preferred_lifetime = val;
  490         return (0);
  491 }
  492 
  493 static int
  494 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS)
  495 {
  496         int error, val;
  497 
  498         val = V_ip6_temp_valid_lifetime;
  499         error = sysctl_handle_int(oidp, &val, 0, req);
  500         if (error != 0 || !req->newptr)
  501                 return (error);
  502         if (val < V_ip6_temp_preferred_lifetime)
  503                 return (EINVAL);
  504         V_ip6_temp_valid_lifetime = val;
  505         return (0);
  506 }
  507 
  508 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
  509         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
  510         "Enable IPv6 forwarding between interfaces");
  511 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
  512         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
  513         "Send a redirect message when forwarding back to a source link");
  514 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
  515         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
  516         "Default hop limit");
  517 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
  518         ip6stat,
  519         "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
  520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
  521         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0,
  522         "Maximum allowed number of outstanding fragmented IPv6 packets");
  523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
  524         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
  525         "Default value of per-interface flag for accepting ICMPv6 RA messages");
  526 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
  527         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
  528         "Default value of per-interface flag to control whether routers "
  529         "sending ICMPv6 RA messages on that interface are added into the "
  530         "default router list");
  531 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif,
  532         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0,
  533         "Always set clear the R flag in ICMPv6 NA messages when accepting RA "
  534         "on the interface");
  535 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
  536         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
  537         "Accept the default router list from ICMPv6 RA messages even "
  538         "when packet forwarding is enabled");
  539 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
  540         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
  541         "Frequency in seconds at which to log IPv6 forwarding errors");
  542 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
  543         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
  544         "Maximum allowed number of nested protocol headers");
  545 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
  546         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
  547         "Number of ICMPv6 NS messages sent during duplicate address detection");
  548 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
  549         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
  550         "Provide an IPv6 flowlabel in outbound packets");
  551 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
  552         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
  553         "Default hop limit for multicast packets");
  554 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
  555         CTLFLAG_RD, __KAME_VERSION, 0,
  556         "KAME version string");
  557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
  558         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
  559         "Allow the use of addresses whose preferred lifetimes have expired");
  560 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
  561         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
  562         ""); /* XXX unused */
  563 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
  564         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
  565         "Create RFC3041 temporary addresses for autoconfigured addresses");
  566 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
  567         CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
  568         NULL, 0, sysctl_ip6_temppltime, "I",
  569         "Maximum preferred lifetime for temporary addresses");
  570 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
  571         CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
  572         NULL, 0, sysctl_ip6_tempvltime, "I",
  573         "Maximum valid lifetime for temporary addresses");
  574 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
  575         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
  576         "Restrict AF_INET6 sockets to IPv6 addresses only");
  577 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
  578         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
  579         "Default value of per-interface flag for automatically adding an IPv6 "
  580         "link-local address to interfaces when attached");
  581 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats,
  582         struct rip6stat, rip6stat,
  583         "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)");
  584 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
  585         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
  586         "Prefer RFC3041 temporary addresses in source address selection");
  587 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
  588         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
  589         "Use the default scope zone when none is specified");
  590 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags,
  591         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfrags), 0,
  592         "Maximum allowed number of outstanding IPv6 packet fragments");
  593 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu,
  594         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0,
  595         "Enable path MTU discovery for multicast packets");
  596 #ifdef IPSTEALTH
  597 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW,
  598         &VNET_NAME(ip6stealth), 0,
  599         "Forward IPv6 packets without decrementing their TTL");
  600 #endif
  601 
  602 /* net.inet6.icmp6 */
  603 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
  604         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
  605         "Accept ICMPv6 redirect messages");
  606 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
  607         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0,
  608         ""); /* XXX unused */
  609 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats,
  610         struct icmp6stat, icmp6stat,
  611         "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)");
  612 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
  613         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0,
  614         "Frequency in seconds of checks for expired prefixes and routers");
  615 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay,
  616         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0,
  617         "Delay in seconds before probing for reachability");
  618 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
  619         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
  620         "Number of ICMPv6 NS messages sent during reachability detection");
  621 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
  622         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
  623         "Number of ICMPv6 NS messages sent during address resolution");
  624 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
  625         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
  626         "Create a loopback route when configuring an IPv6 address");
  627 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo,
  628         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0,
  629         "Mask of enabled RF4620 node information query types");
  630 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX,
  631         nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW,
  632         &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0,
  633         "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup "
  634         "for compatibility with KAME implementation");
  635 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
  636         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0,
  637         "Maximum number of ICMPv6 error messages per second");
  638 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
  639         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0,
  640         ""); /* XXX unused */
  641 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug,
  642         CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0,
  643         "Log NDP debug messages");
  644 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
  645         nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW,
  646         &VNET_NAME(nd6_onlink_ns_rfc4861), 0,
  647         "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861");

Cache object: 10274bca1f008611f3e3a7f44544280c


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