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_init = ip6_init, 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, 158 .pr_input = udp6_input, 159 .pr_ctlinput = udp6_ctlinput, 160 .pr_ctloutput = ip6_ctloutput, 161 #ifndef INET /* Do not call initialization twice. */ 162 .pr_init = udp_init, 163 #endif 164 .pr_usrreqs = &udp6_usrreqs, 165 }, 166 { 167 .pr_type = SOCK_STREAM, 168 .pr_domain = &inet6domain, 169 .pr_protocol = IPPROTO_TCP, 170 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_LISTEN, 171 .pr_input = tcp6_input, 172 .pr_ctlinput = tcp6_ctlinput, 173 .pr_ctloutput = tcp_ctloutput, 174 #ifndef INET /* don't call initialization, timeout, and drain routines twice */ 175 .pr_init = tcp_init, 176 .pr_slowtimo = tcp_slowtimo, 177 .pr_drain = tcp_drain, 178 #endif 179 .pr_usrreqs = &tcp6_usrreqs, 180 }, 181 #ifdef SCTP 182 { 183 .pr_type = SOCK_SEQPACKET, 184 .pr_domain = &inet6domain, 185 .pr_protocol = IPPROTO_SCTP, 186 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 187 .pr_input = sctp6_input, 188 .pr_ctlinput = sctp6_ctlinput, 189 .pr_ctloutput = sctp_ctloutput, 190 #ifndef INET /* Do not call initialization and drain routines twice. */ 191 .pr_drain = sctp_drain, 192 .pr_init = sctp_init, 193 #endif 194 .pr_usrreqs = &sctp6_usrreqs 195 }, 196 { 197 .pr_type = SOCK_STREAM, 198 .pr_domain = &inet6domain, 199 .pr_protocol = IPPROTO_SCTP, 200 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 201 .pr_input = sctp6_input, 202 .pr_ctlinput = sctp6_ctlinput, 203 .pr_ctloutput = sctp_ctloutput, 204 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */ 205 .pr_usrreqs = &sctp6_usrreqs 206 }, 207 #endif /* SCTP */ 208 { 209 .pr_type = SOCK_DGRAM, 210 .pr_domain = &inet6domain, 211 .pr_protocol = IPPROTO_UDPLITE, 212 .pr_flags = PR_ATOMIC|PR_ADDR, 213 .pr_input = udp6_input, 214 .pr_ctlinput = udplite6_ctlinput, 215 .pr_ctloutput = udp_ctloutput, 216 #ifndef INET /* Do not call initialization twice. */ 217 .pr_init = udplite_init, 218 #endif 219 .pr_usrreqs = &udp6_usrreqs, 220 }, 221 { 222 .pr_type = SOCK_RAW, 223 .pr_domain = &inet6domain, 224 .pr_protocol = IPPROTO_RAW, 225 .pr_flags = PR_ATOMIC|PR_ADDR, 226 .pr_input = rip6_input, 227 .pr_output = rip6_output, 228 .pr_ctlinput = rip6_ctlinput, 229 .pr_ctloutput = rip6_ctloutput, 230 #ifndef INET /* Do not call initialization twice. */ 231 .pr_init = rip_init, 232 #endif 233 .pr_usrreqs = &rip6_usrreqs 234 }, 235 { 236 .pr_type = SOCK_RAW, 237 .pr_domain = &inet6domain, 238 .pr_protocol = IPPROTO_ICMPV6, 239 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 240 .pr_input = icmp6_input, 241 .pr_output = rip6_output, 242 .pr_ctlinput = rip6_ctlinput, 243 .pr_ctloutput = rip6_ctloutput, 244 .pr_fasttimo = icmp6_fasttimo, 245 .pr_slowtimo = icmp6_slowtimo, 246 .pr_usrreqs = &rip6_usrreqs 247 }, 248 { 249 .pr_type = SOCK_RAW, 250 .pr_domain = &inet6domain, 251 .pr_protocol = IPPROTO_DSTOPTS, 252 .pr_flags = PR_ATOMIC|PR_ADDR, 253 .pr_input = dest6_input, 254 .pr_usrreqs = &nousrreqs 255 }, 256 { 257 .pr_type = SOCK_RAW, 258 .pr_domain = &inet6domain, 259 .pr_protocol = IPPROTO_ROUTING, 260 .pr_flags = PR_ATOMIC|PR_ADDR, 261 .pr_input = route6_input, 262 .pr_usrreqs = &nousrreqs 263 }, 264 { 265 .pr_type = SOCK_RAW, 266 .pr_domain = &inet6domain, 267 .pr_protocol = IPPROTO_FRAGMENT, 268 .pr_flags = PR_ATOMIC|PR_ADDR, 269 .pr_input = frag6_input, 270 .pr_usrreqs = &nousrreqs 271 }, 272 #ifdef INET 273 { 274 .pr_type = SOCK_RAW, 275 .pr_domain = &inet6domain, 276 .pr_protocol = IPPROTO_IPV4, 277 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 278 .pr_input = encap6_input, 279 .pr_output = rip6_output, 280 .pr_ctloutput = rip6_ctloutput, 281 .pr_usrreqs = &rip6_usrreqs 282 }, 283 #endif /* INET */ 284 { 285 .pr_type = SOCK_RAW, 286 .pr_domain = &inet6domain, 287 .pr_protocol = IPPROTO_IPV6, 288 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 289 .pr_input = encap6_input, 290 .pr_output = rip6_output, 291 .pr_ctloutput = rip6_ctloutput, 292 .pr_usrreqs = &rip6_usrreqs 293 }, 294 { 295 .pr_type = SOCK_RAW, 296 .pr_domain = &inet6domain, 297 .pr_protocol = IPPROTO_GRE, 298 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 299 .pr_input = encap6_input, 300 .pr_output = rip6_output, 301 .pr_ctloutput = rip6_ctloutput, 302 .pr_usrreqs = &rip6_usrreqs 303 }, 304 { 305 .pr_type = SOCK_RAW, 306 .pr_domain = &inet6domain, 307 .pr_protocol = IPPROTO_PIM, 308 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 309 .pr_input = encap6_input, 310 .pr_output = rip6_output, 311 .pr_ctloutput = rip6_ctloutput, 312 .pr_usrreqs = &rip6_usrreqs 313 }, 314 /* Spacer n-times for loadable protocols. */ 315 IP6PROTOSPACER, 316 IP6PROTOSPACER, 317 IP6PROTOSPACER, 318 IP6PROTOSPACER, 319 IP6PROTOSPACER, 320 IP6PROTOSPACER, 321 IP6PROTOSPACER, 322 IP6PROTOSPACER, 323 /* raw wildcard */ 324 { 325 .pr_type = SOCK_RAW, 326 .pr_domain = &inet6domain, 327 .pr_flags = PR_ATOMIC|PR_ADDR, 328 .pr_input = rip6_input, 329 .pr_output = rip6_output, 330 .pr_ctloutput = rip6_ctloutput, 331 .pr_usrreqs = &rip6_usrreqs 332 }, 333 }; 334 335 struct domain inet6domain = { 336 .dom_family = AF_INET6, 337 .dom_name = "internet6", 338 .dom_protosw = (struct protosw *)inet6sw, 339 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], 340 .dom_rtattach = in6_inithead, 341 #ifdef VIMAGE 342 .dom_rtdetach = in6_detachhead, 343 #endif 344 .dom_ifattach = in6_domifattach, 345 .dom_ifdetach = in6_domifdetach, 346 .dom_ifmtu = in6_domifmtu 347 }; 348 349 VNET_DOMAIN_SET(inet6); 350 351 /* 352 * Internet configuration info 353 */ 354 #ifndef IPV6FORWARDING 355 #ifdef GATEWAY6 356 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 357 #else 358 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 359 #endif /* GATEWAY6 */ 360 #endif /* !IPV6FORWARDING */ 361 362 #ifndef IPV6_SENDREDIRECTS 363 #define IPV6_SENDREDIRECTS 1 364 #endif 365 366 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 367 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 368 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 369 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 370 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 371 VNET_DEFINE(int, ip6_no_radr) = 0; 372 VNET_DEFINE(int, ip6_norbit_raif) = 0; 373 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 374 VNET_DEFINE(int, ip6_log_interval) = 5; 375 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 376 * process? */ 377 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 378 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 379 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 380 * (RFC2462 5.5.4) */ 381 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 382 * walk list every 5 sec. */ 383 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 384 VNET_DEFINE(int, ip6_v6only) = 1; 385 386 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 387 #ifdef IPSTEALTH 388 VNET_DEFINE(int, ip6stealth) = 0; 389 #endif 390 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 391 * (RFC 4861) */ 392 393 /* icmp6 */ 394 /* 395 * BSDI4 defines these variables in in_proto.c... 396 * XXX: what if we don't define INET? Should we define pmtu6_expire 397 * or so? (jinmei@kame.net 19990310) 398 */ 399 VNET_DEFINE(int, pmtu_expire) = 60*10; 400 VNET_DEFINE(int, pmtu_probe) = 60*2; 401 402 /* ICMPV6 parameters */ 403 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 404 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 405 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 406 /* control how to respond to NI queries */ 407 VNET_DEFINE(int, icmp6_nodeinfo) = 408 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 409 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 410 411 /* 412 * sysctl related items. 413 */ 414 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 415 "Internet6 Family"); 416 417 /* net.inet6 */ 418 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 419 "IP6"); 420 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 421 "ICMP6"); 422 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 423 "UDP6"); 424 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 425 "TCP6"); 426 #if defined(SCTP) || defined(SCTP_SUPPORT) 427 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 428 "SCTP6"); 429 #endif 430 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 431 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 432 "IPSEC6"); 433 #endif /* IPSEC */ 434 435 /* net.inet6.ip6 */ 436 static int 437 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 438 { 439 int error, val; 440 441 val = V_ip6_temp_preferred_lifetime; 442 error = sysctl_handle_int(oidp, &val, 0, req); 443 if (error != 0 || !req->newptr) 444 return (error); 445 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 446 return (EINVAL); 447 V_ip6_temp_preferred_lifetime = val; 448 return (0); 449 } 450 451 static int 452 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 453 { 454 int error, val; 455 456 val = V_ip6_temp_valid_lifetime; 457 error = sysctl_handle_int(oidp, &val, 0, req); 458 if (error != 0 || !req->newptr) 459 return (error); 460 if (val < V_ip6_temp_preferred_lifetime) 461 return (EINVAL); 462 V_ip6_temp_valid_lifetime = val; 463 return (0); 464 } 465 466 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 467 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 468 "Enable forwarding of IPv6 packets between interfaces"); 469 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 470 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 471 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 472 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 473 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 474 "Default hop limit to use for outgoing IPv6 packets"); 475 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 476 ip6stat, 477 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 478 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 479 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 480 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 481 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 482 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 483 "Default value of per-interface flag to control whether routers " 484 "sending ICMPv6 RA messages on that interface are added into the " 485 "default router list"); 486 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 487 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 488 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 489 "on the interface"); 490 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 491 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 492 "Accept the default router list from ICMPv6 RA messages even " 493 "when packet forwarding is enabled"); 494 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 495 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 496 "Frequency in seconds at which to log IPv6 forwarding errors"); 497 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 498 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 499 "Default maximum number of IPv6 extension headers permitted on " 500 "incoming IPv6 packets, 0 for no artificial limit"); 501 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 502 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 503 "Number of ICMPv6 NS messages sent during duplicate address detection"); 504 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 505 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 506 "Provide an IPv6 flowlabel in outbound packets"); 507 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 508 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 509 "Default hop limit for IPv6 multicast packets originating from this " 510 "node"); 511 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 512 CTLFLAG_RD, __KAME_VERSION, 0, 513 "KAME version string"); 514 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 515 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 516 "Allow the use of addresses whose preferred lifetimes have expired"); 517 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 518 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 519 ""); /* XXX unused */ 520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 521 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 522 "Create RFC3041 temporary addresses for autoconfigured addresses"); 523 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 524 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 525 NULL, 0, sysctl_ip6_temppltime, "I", 526 "Maximum preferred lifetime for temporary addresses"); 527 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 528 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 529 NULL, 0, sysctl_ip6_tempvltime, "I", 530 "Maximum valid lifetime for temporary addresses"); 531 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 532 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 533 "Restrict AF_INET6 sockets to IPv6 addresses only"); 534 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 535 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 536 "Default value of per-interface flag for automatically adding an IPv6 " 537 "link-local address to interfaces when attached"); 538 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 539 struct rip6stat, rip6stat, 540 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 541 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 542 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 543 "Prefer RFC3041 temporary addresses in source address selection"); 544 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 545 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 546 "Use the default scope zone when none is specified"); 547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 548 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 549 "Enable path MTU discovery for multicast packets"); 550 #ifdef IPSTEALTH 551 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 552 &VNET_NAME(ip6stealth), 0, 553 "Forward IPv6 packets without decrementing their TTL"); 554 #endif 555 556 /* net.inet6.icmp6 */ 557 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 558 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 559 "Accept ICMPv6 redirect messages"); 560 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 561 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 562 "Delay in seconds before expiring redirect route"); 563 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 564 struct icmp6stat, icmp6stat, 565 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 566 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 567 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 568 "Frequency in seconds of checks for expired prefixes and routers"); 569 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 570 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 571 "Delay in seconds before probing for reachability"); 572 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 573 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 574 "Number of ICMPv6 NS messages sent during reachability detection"); 575 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 576 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 577 "Number of ICMPv6 NS messages sent during address resolution"); 578 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 579 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 580 "Create a loopback route when configuring an IPv6 address"); 581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 582 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 583 "Mask of enabled RFC4620 node information query types"); 584 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 585 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 586 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 587 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 588 "for compatibility with KAME implementation"); 589 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 590 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 591 "Maximum number of ICMPv6 error messages per second"); 592 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 593 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 594 ""); /* XXX unused */ 595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 596 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 597 "Log NDP debug messages"); 598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 599 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 600 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 601 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 602 #ifdef EXPERIMENTAL 603 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 604 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 605 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 606 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 607 "draft-ietf-6man-ipv6only-flag"); 608 #endif 609