1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ 32 */ 33 34 /*- 35 * Copyright (c) 1982, 1986, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 63 */ 64 65 #include <sys/cdefs.h> 66 __FBSDID("$FreeBSD$"); 67 68 #include "opt_inet.h" 69 #include "opt_inet6.h" 70 #include "opt_ipsec.h" 71 #include "opt_ipstealth.h" 72 #include "opt_sctp.h" 73 #include "opt_route.h" 74 75 #include <sys/param.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/proc.h> 79 #include <sys/protosw.h> 80 #include <sys/jail.h> 81 #include <sys/kernel.h> 82 #include <sys/malloc.h> 83 #include <sys/domain.h> 84 #include <sys/mbuf.h> 85 #include <sys/systm.h> 86 #include <sys/sysctl.h> 87 88 #include <net/if.h> 89 #include <net/if_var.h> 90 #include <net/radix.h> 91 #include <net/route.h> 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 #include <netinet6/ip6protosw.h> 123 124 /* 125 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 126 */ 127 FEATURE(inet6, "Internet Protocol version 6"); 128 129 extern struct domain inet6domain; 130 static struct pr_usrreqs nousrreqs; 131 132 #define PR_LISTEN 0 133 #define PR_ABRTACPTDIS 0 134 135 /* Spacer for loadable protocols. */ 136 #define IP6PROTOSPACER \ 137 { \ 138 .pr_domain = &inet6domain, \ 139 .pr_protocol = PROTO_SPACER, \ 140 .pr_usrreqs = &nousrreqs \ 141 } 142 143 struct protosw inet6sw[] = { 144 { 145 .pr_type = 0, 146 .pr_domain = &inet6domain, 147 .pr_protocol = IPPROTO_IPV6, 148 .pr_flags = PR_CAPATTACH, 149 .pr_slowtimo = frag6_slowtimo, 150 .pr_drain = frag6_drain, 151 .pr_usrreqs = &nousrreqs, 152 }, 153 { 154 .pr_type = SOCK_DGRAM, 155 .pr_domain = &inet6domain, 156 .pr_protocol = IPPROTO_UDP, 157 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, 158 .pr_input = udp6_input, 159 .pr_ctlinput = udp6_ctlinput, 160 .pr_ctloutput = ip6_ctloutput, 161 .pr_usrreqs = &udp6_usrreqs, 162 }, 163 { 164 .pr_type = SOCK_STREAM, 165 .pr_domain = &inet6domain, 166 .pr_protocol = IPPROTO_TCP, 167 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD| 168 PR_LISTEN|PR_CAPATTACH, 169 .pr_input = tcp6_input, 170 .pr_ctlinput = tcp6_ctlinput, 171 .pr_ctloutput = tcp_ctloutput, 172 #ifndef INET /* don't call initialization, timeout, and drain routines twice */ 173 .pr_slowtimo = tcp_slowtimo, 174 .pr_drain = tcp_drain, 175 #endif 176 .pr_usrreqs = &tcp6_usrreqs, 177 }, 178 #ifdef SCTP 179 { 180 .pr_type = SOCK_SEQPACKET, 181 .pr_domain = &inet6domain, 182 .pr_protocol = IPPROTO_SCTP, 183 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 184 .pr_input = sctp6_input, 185 .pr_ctlinput = sctp6_ctlinput, 186 .pr_ctloutput = sctp_ctloutput, 187 #ifndef INET /* Do not call initialization and drain routines twice. */ 188 .pr_drain = sctp_drain, 189 #endif 190 .pr_usrreqs = &sctp6_usrreqs 191 }, 192 { 193 .pr_type = SOCK_STREAM, 194 .pr_domain = &inet6domain, 195 .pr_protocol = IPPROTO_SCTP, 196 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 197 .pr_input = sctp6_input, 198 .pr_ctlinput = sctp6_ctlinput, 199 .pr_ctloutput = sctp_ctloutput, 200 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */ 201 .pr_usrreqs = &sctp6_usrreqs 202 }, 203 #endif /* SCTP */ 204 { 205 .pr_type = SOCK_DGRAM, 206 .pr_domain = &inet6domain, 207 .pr_protocol = IPPROTO_UDPLITE, 208 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, 209 .pr_input = udp6_input, 210 .pr_ctlinput = udplite6_ctlinput, 211 .pr_ctloutput = udp_ctloutput, 212 .pr_usrreqs = &udp6_usrreqs, 213 }, 214 { 215 .pr_type = SOCK_RAW, 216 .pr_domain = &inet6domain, 217 .pr_protocol = IPPROTO_RAW, 218 .pr_flags = PR_ATOMIC|PR_ADDR, 219 .pr_input = rip6_input, 220 .pr_ctlinput = rip6_ctlinput, 221 .pr_ctloutput = rip6_ctloutput, 222 .pr_usrreqs = &rip6_usrreqs 223 }, 224 { 225 .pr_type = SOCK_RAW, 226 .pr_domain = &inet6domain, 227 .pr_protocol = IPPROTO_ICMPV6, 228 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 229 .pr_input = icmp6_input, 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 INET 261 { 262 .pr_type = SOCK_RAW, 263 .pr_domain = &inet6domain, 264 .pr_protocol = IPPROTO_IPV4, 265 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 266 .pr_input = encap6_input, 267 .pr_ctloutput = rip6_ctloutput, 268 .pr_usrreqs = &rip6_usrreqs 269 }, 270 #endif /* INET */ 271 { 272 .pr_type = SOCK_RAW, 273 .pr_domain = &inet6domain, 274 .pr_protocol = IPPROTO_IPV6, 275 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 276 .pr_input = encap6_input, 277 .pr_ctloutput = rip6_ctloutput, 278 .pr_usrreqs = &rip6_usrreqs 279 }, 280 { 281 .pr_type = SOCK_RAW, 282 .pr_domain = &inet6domain, 283 .pr_protocol = IPPROTO_ETHERIP, 284 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 285 .pr_input = encap6_input, 286 .pr_ctloutput = rip6_ctloutput, 287 .pr_usrreqs = &rip6_usrreqs 288 }, 289 { 290 .pr_type = SOCK_RAW, 291 .pr_domain = &inet6domain, 292 .pr_protocol = IPPROTO_GRE, 293 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 294 .pr_input = encap6_input, 295 .pr_ctloutput = rip6_ctloutput, 296 .pr_usrreqs = &rip6_usrreqs 297 }, 298 { 299 .pr_type = SOCK_RAW, 300 .pr_domain = &inet6domain, 301 .pr_protocol = IPPROTO_PIM, 302 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 303 .pr_input = encap6_input, 304 .pr_ctloutput = rip6_ctloutput, 305 .pr_usrreqs = &rip6_usrreqs 306 }, 307 /* Spacer n-times for loadable protocols. */ 308 IP6PROTOSPACER, 309 IP6PROTOSPACER, 310 IP6PROTOSPACER, 311 IP6PROTOSPACER, 312 IP6PROTOSPACER, 313 IP6PROTOSPACER, 314 IP6PROTOSPACER, 315 IP6PROTOSPACER, 316 /* raw wildcard */ 317 { 318 .pr_type = SOCK_RAW, 319 .pr_domain = &inet6domain, 320 .pr_flags = PR_ATOMIC|PR_ADDR, 321 .pr_input = rip6_input, 322 .pr_ctloutput = rip6_ctloutput, 323 .pr_usrreqs = &rip6_usrreqs 324 }, 325 }; 326 327 struct domain inet6domain = { 328 .dom_family = AF_INET6, 329 .dom_name = "internet6", 330 .dom_protosw = (struct protosw *)inet6sw, 331 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], 332 .dom_rtattach = in6_inithead, 333 #ifdef VIMAGE 334 .dom_rtdetach = in6_detachhead, 335 #endif 336 .dom_ifattach = in6_domifattach, 337 .dom_ifdetach = in6_domifdetach, 338 .dom_ifmtu = in6_domifmtu 339 }; 340 341 DOMAIN_SET(inet6); 342 343 /* 344 * Internet configuration info 345 */ 346 #ifndef IPV6FORWARDING 347 #ifdef GATEWAY6 348 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 349 #else 350 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 351 #endif /* GATEWAY6 */ 352 #endif /* !IPV6FORWARDING */ 353 354 #ifndef IPV6_SENDREDIRECTS 355 #define IPV6_SENDREDIRECTS 1 356 #endif 357 358 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 359 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 360 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 361 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 362 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 363 VNET_DEFINE(int, ip6_no_radr) = 0; 364 VNET_DEFINE(int, ip6_norbit_raif) = 0; 365 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 366 VNET_DEFINE(int, ip6_log_interval) = 5; 367 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 368 * process? */ 369 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 370 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 371 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 372 * (RFC2462 5.5.4) */ 373 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 374 * walk list every 5 sec. */ 375 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 376 VNET_DEFINE(int, ip6_v6only) = 1; 377 378 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 379 #ifdef IPSTEALTH 380 VNET_DEFINE(int, ip6stealth) = 0; 381 #endif 382 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 383 * (RFC 4861) */ 384 385 /* icmp6 */ 386 /* 387 * BSDI4 defines these variables in in_proto.c... 388 * XXX: what if we don't define INET? Should we define pmtu6_expire 389 * or so? (jinmei@kame.net 19990310) 390 */ 391 VNET_DEFINE(int, pmtu_expire) = 60*10; 392 VNET_DEFINE(int, pmtu_probe) = 60*2; 393 394 /* ICMPV6 parameters */ 395 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 396 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 397 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 398 /* control how to respond to NI queries */ 399 VNET_DEFINE(int, icmp6_nodeinfo) = 400 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 401 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 402 403 /* 404 * sysctl related items. 405 */ 406 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 407 "Internet6 Family"); 408 409 /* net.inet6 */ 410 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 411 "IP6"); 412 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 413 "ICMP6"); 414 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 415 "UDP6"); 416 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 417 "TCP6"); 418 #if defined(SCTP) || defined(SCTP_SUPPORT) 419 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 420 "SCTP6"); 421 #endif 422 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 423 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 424 "IPSEC6"); 425 #endif /* IPSEC */ 426 427 /* net.inet6.ip6 */ 428 static int 429 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 430 { 431 int error, val; 432 433 val = V_ip6_temp_preferred_lifetime; 434 error = sysctl_handle_int(oidp, &val, 0, req); 435 if (error != 0 || !req->newptr) 436 return (error); 437 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 438 return (EINVAL); 439 V_ip6_temp_preferred_lifetime = val; 440 return (0); 441 } 442 443 static int 444 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 445 { 446 int error, val; 447 448 val = V_ip6_temp_valid_lifetime; 449 error = sysctl_handle_int(oidp, &val, 0, req); 450 if (error != 0 || !req->newptr) 451 return (error); 452 if (val < V_ip6_temp_preferred_lifetime) 453 return (EINVAL); 454 V_ip6_temp_valid_lifetime = val; 455 return (0); 456 } 457 458 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 459 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 460 "Enable forwarding of IPv6 packets between interfaces"); 461 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 462 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 463 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 464 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 465 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 466 "Default hop limit to use for outgoing IPv6 packets"); 467 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 468 ip6stat, 469 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 470 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 471 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 472 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 473 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 474 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 475 "Default value of per-interface flag to control whether routers " 476 "sending ICMPv6 RA messages on that interface are added into the " 477 "default router list"); 478 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 479 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 480 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 481 "on the interface"); 482 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 483 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 484 "Accept the default router list from ICMPv6 RA messages even " 485 "when packet forwarding is enabled"); 486 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 487 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 488 "Frequency in seconds at which to log IPv6 forwarding errors"); 489 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 490 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 491 "Default maximum number of IPv6 extension headers permitted on " 492 "incoming IPv6 packets, 0 for no artificial limit"); 493 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 494 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 495 "Number of ICMPv6 NS messages sent during duplicate address detection"); 496 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 497 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 498 "Provide an IPv6 flowlabel in outbound packets"); 499 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 500 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 501 "Default hop limit for IPv6 multicast packets originating from this " 502 "node"); 503 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 504 CTLFLAG_RD, __KAME_VERSION, 0, 505 "KAME version string"); 506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 508 "Allow the use of addresses whose preferred lifetimes have expired"); 509 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 510 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 511 ""); /* XXX unused */ 512 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 513 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 514 "Create RFC3041 temporary addresses for autoconfigured addresses"); 515 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 516 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 517 NULL, 0, sysctl_ip6_temppltime, "I", 518 "Maximum preferred lifetime for temporary addresses"); 519 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 520 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 521 NULL, 0, sysctl_ip6_tempvltime, "I", 522 "Maximum valid lifetime for temporary addresses"); 523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 524 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 525 "Restrict AF_INET6 sockets to IPv6 addresses only"); 526 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 527 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 528 "Default value of per-interface flag for automatically adding an IPv6 " 529 "link-local address to interfaces when attached"); 530 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 531 struct rip6stat, rip6stat, 532 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 534 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 535 "Prefer RFC3041 temporary addresses in source address selection"); 536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 538 "Use the default scope zone when none is specified"); 539 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 540 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 541 "Enable path MTU discovery for multicast packets"); 542 #ifdef IPSTEALTH 543 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 544 &VNET_NAME(ip6stealth), 0, 545 "Forward IPv6 packets without decrementing their TTL"); 546 #endif 547 548 /* net.inet6.icmp6 */ 549 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 550 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 551 "Accept ICMPv6 redirect messages"); 552 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 553 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 554 "Delay in seconds before expiring redirect route"); 555 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 556 struct icmp6stat, icmp6stat, 557 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 558 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 559 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 560 "Frequency in seconds of checks for expired prefixes and routers"); 561 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 562 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 563 "Delay in seconds before probing for reachability"); 564 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 565 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 566 "Number of ICMPv6 NS messages sent during reachability detection"); 567 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 568 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 569 "Number of ICMPv6 NS messages sent during address resolution"); 570 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 571 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 572 "Create a loopback route when configuring an IPv6 address"); 573 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 574 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 575 "Mask of enabled RFC4620 node information query types"); 576 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 577 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 578 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 579 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 580 "for compatibility with KAME implementation"); 581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 582 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 583 "Maximum number of ICMPv6 error messages per second"); 584 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 585 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 586 ""); /* XXX unused */ 587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 588 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 589 "Log NDP debug messages"); 590 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 591 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 592 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 593 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 594 #ifdef EXPERIMENTAL 595 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 596 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 597 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 598 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 599 "draft-ietf-6man-ipv6only-flag"); 600 #endif 601