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/11/sys/netinet6/in6_proto.c 364161 2020-08-12 12:07:15Z ae $"); 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#include <netinet6/ip6protosw.h> 125 126/* 127 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 128 */ 129FEATURE(inet6, "Internet Protocol version 6"); 130 131extern struct domain inet6domain; 132static struct pr_usrreqs nousrreqs; 133 134#define PR_LISTEN 0 135#define PR_ABRTACPTDIS 0 136 137/* Spacer for loadable protocols. */ 138#define IP6PROTOSPACER \ 139{ \ 140 .pr_domain = &inet6domain, \ 141 .pr_protocol = PROTO_SPACER, \ 142 .pr_usrreqs = &nousrreqs \ 143} 144 145struct protosw inet6sw[] = { 146{ 147 .pr_type = 0, 148 .pr_domain = &inet6domain, 149 .pr_protocol = IPPROTO_IPV6, 150 .pr_init = ip6_init, 151 .pr_slowtimo = frag6_slowtimo, 152 .pr_drain = frag6_drain, 153 .pr_usrreqs = &nousrreqs, 154}, 155{ 156 .pr_type = SOCK_DGRAM, 157 .pr_domain = &inet6domain, 158 .pr_protocol = IPPROTO_UDP, 159 .pr_flags = PR_ATOMIC|PR_ADDR, 160 .pr_input = udp6_input, 161 .pr_ctlinput = udp6_ctlinput, 162 .pr_ctloutput = ip6_ctloutput, 163#ifndef INET /* Do not call initialization twice. */ 164 .pr_init = udp_init, 165#endif 166 .pr_usrreqs = &udp6_usrreqs, 167}, 168{ 169 .pr_type = SOCK_STREAM, 170 .pr_domain = &inet6domain, 171 .pr_protocol = IPPROTO_TCP, 172 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN, 173 .pr_input = tcp6_input, 174 .pr_ctlinput = tcp6_ctlinput, 175 .pr_ctloutput = tcp_ctloutput, 176#ifndef INET /* don't call initialization and timeout routines twice */ 177 .pr_init = tcp_init, 178 .pr_slowtimo = tcp_slowtimo, 179#endif 180 .pr_drain = tcp_drain, 181 .pr_usrreqs = &tcp6_usrreqs, 182}, 183#ifdef SCTP 184{ 185 .pr_type = SOCK_SEQPACKET, 186 .pr_domain = &inet6domain, 187 .pr_protocol = IPPROTO_SCTP, 188 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 189 .pr_input = sctp6_input, 190 .pr_ctlinput = sctp6_ctlinput, 191 .pr_ctloutput = sctp_ctloutput, 192 .pr_drain = sctp_drain, 193#ifndef INET /* Do not call initialization twice. */ 194 .pr_init = sctp_init, 195#endif 196 .pr_usrreqs = &sctp6_usrreqs 197}, 198{ 199 .pr_type = SOCK_STREAM, 200 .pr_domain = &inet6domain, 201 .pr_protocol = IPPROTO_SCTP, 202 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 203 .pr_input = sctp6_input, 204 .pr_ctlinput = sctp6_ctlinput, 205 .pr_ctloutput = sctp_ctloutput, 206 .pr_drain = sctp_drain, 207 .pr_usrreqs = &sctp6_usrreqs 208}, 209#endif /* SCTP */ 210{ 211 .pr_type = SOCK_DGRAM, 212 .pr_domain = &inet6domain, 213 .pr_protocol = IPPROTO_UDPLITE, 214 .pr_flags = PR_ATOMIC|PR_ADDR, 215 .pr_input = udp6_input, 216 .pr_ctlinput = udplite6_ctlinput, 217 .pr_ctloutput = udp_ctloutput, 218#ifndef INET /* Do not call initialization twice. */ 219 .pr_init = udplite_init, 220#endif 221 .pr_usrreqs = &udp6_usrreqs, 222}, 223{ 224 .pr_type = SOCK_RAW, 225 .pr_domain = &inet6domain, 226 .pr_protocol = IPPROTO_RAW, 227 .pr_flags = PR_ATOMIC|PR_ADDR, 228 .pr_input = rip6_input, 229 .pr_output = rip6_output, 230 .pr_ctlinput = rip6_ctlinput, 231 .pr_ctloutput = rip6_ctloutput, 232#ifndef INET /* Do not call initialization twice. */ 233 .pr_init = rip_init, 234#endif 235 .pr_usrreqs = &rip6_usrreqs 236}, 237{ 238 .pr_type = SOCK_RAW, 239 .pr_domain = &inet6domain, 240 .pr_protocol = IPPROTO_ICMPV6, 241 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 242 .pr_input = icmp6_input, 243 .pr_output = rip6_output, 244 .pr_ctlinput = rip6_ctlinput, 245 .pr_ctloutput = rip6_ctloutput, 246 .pr_fasttimo = icmp6_fasttimo, 247 .pr_slowtimo = icmp6_slowtimo, 248 .pr_usrreqs = &rip6_usrreqs 249}, 250{ 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inet6domain, 253 .pr_protocol = IPPROTO_DSTOPTS, 254 .pr_flags = PR_ATOMIC|PR_ADDR, 255 .pr_input = dest6_input, 256 .pr_usrreqs = &nousrreqs 257}, 258{ 259 .pr_type = SOCK_RAW, 260 .pr_domain = &inet6domain, 261 .pr_protocol = IPPROTO_ROUTING, 262 .pr_flags = PR_ATOMIC|PR_ADDR, 263 .pr_input = route6_input, 264 .pr_usrreqs = &nousrreqs 265}, 266{ 267 .pr_type = SOCK_RAW, 268 .pr_domain = &inet6domain, 269 .pr_protocol = IPPROTO_FRAGMENT, 270 .pr_flags = PR_ATOMIC|PR_ADDR, 271 .pr_input = frag6_input, 272 .pr_usrreqs = &nousrreqs 273}, 274#ifdef INET 275{ 276 .pr_type = SOCK_RAW, 277 .pr_domain = &inet6domain, 278 .pr_protocol = IPPROTO_IPV4, 279 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 280 .pr_input = encap6_input, 281 .pr_output = rip6_output, 282 .pr_ctloutput = rip6_ctloutput, 283 .pr_usrreqs = &rip6_usrreqs 284}, 285#endif /* INET */ 286{ 287 .pr_type = SOCK_RAW, 288 .pr_domain = &inet6domain, 289 .pr_protocol = IPPROTO_IPV6, 290 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 291 .pr_input = encap6_input, 292 .pr_output = rip6_output, 293 .pr_ctloutput = rip6_ctloutput, 294 .pr_usrreqs = &rip6_usrreqs 295}, 296{ 297 .pr_type = SOCK_RAW, 298 .pr_domain = &inet6domain, 299 .pr_protocol = IPPROTO_GRE, 300 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 301 .pr_input = encap6_input, 302 .pr_output = rip6_output, 303 .pr_ctloutput = rip6_ctloutput, 304 .pr_usrreqs = &rip6_usrreqs 305}, 306{ 307 .pr_type = SOCK_RAW, 308 .pr_domain = &inet6domain, 309 .pr_protocol = IPPROTO_PIM, 310 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 311 .pr_input = encap6_input, 312 .pr_output = rip6_output, 313 .pr_ctloutput = rip6_ctloutput, 314 .pr_usrreqs = &rip6_usrreqs 315}, 316/* Spacer n-times for loadable protocols. */ 317IP6PROTOSPACER, 318IP6PROTOSPACER, 319IP6PROTOSPACER, 320IP6PROTOSPACER, 321IP6PROTOSPACER, 322IP6PROTOSPACER, 323IP6PROTOSPACER, 324IP6PROTOSPACER, 325/* raw wildcard */ 326{ 327 .pr_type = SOCK_RAW, 328 .pr_domain = &inet6domain, 329 .pr_flags = PR_ATOMIC|PR_ADDR, 330 .pr_input = rip6_input, 331 .pr_output = rip6_output, 332 .pr_ctloutput = rip6_ctloutput, 333 .pr_usrreqs = &rip6_usrreqs 334}, 335}; 336 337extern int in6_inithead(void **, int); 338#ifdef VIMAGE 339extern int in6_detachhead(void **, int); 340#endif 341 342struct domain inet6domain = { 343 .dom_family = AF_INET6, 344 .dom_name = "internet6", 345 .dom_protosw = (struct protosw *)inet6sw, 346 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], 347#ifdef RADIX_MPATH 348 .dom_rtattach = rn6_mpath_inithead, 349#else 350 .dom_rtattach = in6_inithead, 351#endif 352#ifdef VIMAGE 353 .dom_rtdetach = in6_detachhead, 354#endif 355 .dom_ifattach = in6_domifattach, 356 .dom_ifdetach = in6_domifdetach, 357 .dom_ifmtu = in6_domifmtu 358}; 359 360VNET_DOMAIN_SET(inet6); 361 362/* 363 * Internet configuration info 364 */ 365#ifndef IPV6FORWARDING 366#ifdef GATEWAY6 367#define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 368#else 369#define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 370#endif /* GATEWAY6 */ 371#endif /* !IPV6FORWARDING */ 372 373#ifndef IPV6_SENDREDIRECTS 374#define IPV6_SENDREDIRECTS 1 375#endif 376 377VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 378VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 379VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 380VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 381VNET_DEFINE(int, ip6_accept_rtadv) = 0; 382VNET_DEFINE(int, ip6_no_radr) = 0; 383VNET_DEFINE(int, ip6_norbit_raif) = 0; 384VNET_DEFINE(int, ip6_rfc6204w3) = 0; 385VNET_DEFINE(int, ip6_maxfragpackets); /* initialized in frag6.c:frag6_init() */ 386int ip6_maxfrags; /* initialized in frag6.c:frag6_init() */ 387VNET_DEFINE(int, ip6_maxfragbucketsize);/* initialized in frag6.c:frag6_init() */ 388VNET_DEFINE(int, ip6_maxfragsperpacket); /* initialized in frag6.c:frag6_init() */ 389VNET_DEFINE(int, ip6_log_interval) = 5; 390VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 391 * process? */ 392VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 393VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 394VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 395 * (RFC2462 5.5.4) */ 396VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 397 * walk list every 5 sec. */ 398VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 399VNET_DEFINE(int, ip6_v6only) = 1; 400 401VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 402#ifdef IPSTEALTH 403VNET_DEFINE(int, ip6stealth) = 0; 404#endif 405VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 406 * (RFC 4861) */ 407 408/* icmp6 */ 409/* 410 * BSDI4 defines these variables in in_proto.c... 411 * XXX: what if we don't define INET? Should we define pmtu6_expire 412 * or so? (jinmei@kame.net 19990310) 413 */ 414VNET_DEFINE(int, pmtu_expire) = 60*10; 415VNET_DEFINE(int, pmtu_probe) = 60*2; 416 417/* ICMPV6 parameters */ 418VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 419VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 420VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 421/* control how to respond to NI queries */ 422VNET_DEFINE(int, icmp6_nodeinfo) = 423 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 424VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 425 426/* 427 * sysctl related items. 428 */ 429SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0, 430 "Internet6 Family"); 431 432/* net.inet6 */ 433SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6"); 434SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6"); 435SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6"); 436SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6"); 437#ifdef SCTP 438SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW, 0, "SCTP6"); 439#endif 440#if defined(IPSEC) || defined(IPSEC_SUPPORT) 441SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6"); 442#endif /* IPSEC */ 443 444/* net.inet6.ip6 */ 445static int 446sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 447{ 448 int error, val; 449 450 val = V_ip6_temp_preferred_lifetime; 451 error = sysctl_handle_int(oidp, &val, 0, req); 452 if (error != 0 || !req->newptr) 453 return (error); 454 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 455 return (EINVAL); 456 V_ip6_temp_preferred_lifetime = val; 457 return (0); 458} 459 460static int 461sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 462{ 463 int error, val; 464 465 val = V_ip6_temp_valid_lifetime; 466 error = sysctl_handle_int(oidp, &val, 0, req); 467 if (error != 0 || !req->newptr) 468 return (error); 469 if (val < V_ip6_temp_preferred_lifetime) 470 return (EINVAL); 471 V_ip6_temp_valid_lifetime = val; 472 return (0); 473} 474 475static int 476sysctl_ip6_maxfragpackets(SYSCTL_HANDLER_ARGS) 477{ 478 int error, val; 479 480 val = V_ip6_maxfragpackets; 481 error = sysctl_handle_int(oidp, &val, 0, req); 482 if (error != 0 || !req->newptr) 483 return (error); 484 V_ip6_maxfragpackets = val; 485 frag6_set_bucketsize(); 486 return (0); 487} 488 489SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 490 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 491 "Enable forwarding of IPv6 packets between interfaces"); 492SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 493 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 494 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 495SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 496 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 497 "Default hop limit to use for outgoing IPv6 packets"); 498SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 499 ip6stat, 500 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 501SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets, 502 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW, NULL, 0, 503 sysctl_ip6_maxfragpackets, "I", 504 "Default maximum number of outstanding fragmented IPv6 packets. " 505 "A value of 0 means no fragmented packets will be accepted, while a " 506 "a value of -1 means no limit"); 507SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 508 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 509 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 510SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 511 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 512 "Default value of per-interface flag to control whether routers " 513 "sending ICMPv6 RA messages on that interface are added into the " 514 "default router list"); 515SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 516 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 517 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 518 "on the interface"); 519SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 520 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 521 "Accept the default router list from ICMPv6 RA messages even " 522 "when packet forwarding is enabled"); 523SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 524 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 525 "Frequency in seconds at which to log IPv6 forwarding errors"); 526SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 527 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 528 "Default maximum number of IPv6 extension headers permitted on " 529 "incoming IPv6 packets, 0 for no artificial limit"); 530SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 531 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 532 "Number of ICMPv6 NS messages sent during duplicate address detection"); 533SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 534 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 535 "Provide an IPv6 flowlabel in outbound packets"); 536SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 538 "Default hop limit for IPv6 multicast packets originating from this " 539 "node"); 540SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 541 CTLFLAG_RD, __KAME_VERSION, 0, 542 "KAME version string"); 543SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 544 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 545 "Allow the use of addresses whose preferred lifetimes have expired"); 546SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 547 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 548 ""); /* XXX unused */ 549SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 550 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 551 "Create RFC3041 temporary addresses for autoconfigured addresses"); 552SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 553 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW, 554 NULL, 0, sysctl_ip6_temppltime, "I", 555 "Maximum preferred lifetime for temporary addresses"); 556SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 557 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW, 558 NULL, 0, sysctl_ip6_tempvltime, "I", 559 "Maximum valid lifetime for temporary addresses"); 560SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 561 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 562 "Restrict AF_INET6 sockets to IPv6 addresses only"); 563SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 564 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 565 "Default value of per-interface flag for automatically adding an IPv6 " 566 "link-local address to interfaces when attached"); 567SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 568 struct rip6stat, rip6stat, 569 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 570SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 571 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 572 "Prefer RFC3041 temporary addresses in source address selection"); 573SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 574 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 575 "Use the default scope zone when none is specified"); 576SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, 577 CTLFLAG_RW, &ip6_maxfrags, 0, 578 "Maximum allowed number of outstanding IPv6 packet fragments. " 579 "A value of 0 means no fragmented packets will be accepted, while a " 580 "a value of -1 means no limit"); 581SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGBUCKETSIZE, maxfragbucketsize, 582 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragbucketsize), 0, 583 "Maximum number of reassembly queues per hash bucket"); 584SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGSPERPACKET, maxfragsperpacket, 585 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragsperpacket), 0, 586 "Maximum allowed number of fragments per packet"); 587SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 588 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 589 "Enable path MTU discovery for multicast packets"); 590#ifdef IPSTEALTH 591SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 592 &VNET_NAME(ip6stealth), 0, 593 "Forward IPv6 packets without decrementing their TTL"); 594#endif 595 596/* net.inet6.icmp6 */ 597SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 598 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 599 "Accept ICMPv6 redirect messages"); 600SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 601 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 602 ""); /* XXX unused */ 603SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 604 struct icmp6stat, icmp6stat, 605 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 606SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 607 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 608 "Frequency in seconds of checks for expired prefixes and routers"); 609SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 610 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 611 "Delay in seconds before probing for reachability"); 612SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 613 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 614 "Number of ICMPv6 NS messages sent during reachability detection"); 615SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 616 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 617 "Number of ICMPv6 NS messages sent during address resolution"); 618SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 619 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 620 "Create a loopback route when configuring an IPv6 address"); 621SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 622 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 623 "Mask of enabled RFC4620 node information query types"); 624SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 625 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 626 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 627 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 628 "for compatibility with KAME implementation"); 629SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 630 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 631 "Maximum number of ICMPv6 error messages per second"); 632SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 633 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 634 ""); /* XXX unused */ 635SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 636 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 637 "Log NDP debug messages"); 638SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 639 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 640 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 641 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 642