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_init = ip6_init, 150 .pr_slowtimo = frag6_slowtimo, 151 .pr_drain = frag6_drain, 152 .pr_usrreqs = &nousrreqs, 153 }, 154 { 155 .pr_type = SOCK_DGRAM, 156 .pr_domain = &inet6domain, 157 .pr_protocol = IPPROTO_UDP, 158 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, 159 .pr_input = udp6_input, 160 .pr_ctlinput = udp6_ctlinput, 161 .pr_ctloutput = ip6_ctloutput, 162 #ifndef INET /* Do not call initialization twice. */ 163 .pr_init = udp_init, 164 #endif 165 .pr_usrreqs = &udp6_usrreqs, 166 }, 167 { 168 .pr_type = SOCK_STREAM, 169 .pr_domain = &inet6domain, 170 .pr_protocol = IPPROTO_TCP, 171 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD| 172 PR_LISTEN|PR_CAPATTACH, 173 .pr_input = tcp6_input, 174 .pr_ctlinput = tcp6_ctlinput, 175 .pr_ctloutput = tcp_ctloutput, 176 #ifndef INET /* don't call initialization, timeout, and drain routines twice */ 177 .pr_init = tcp_init, 178 .pr_slowtimo = tcp_slowtimo, 179 .pr_drain = tcp_drain, 180 #endif 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 #ifndef INET /* Do not call initialization and drain routines twice. */ 193 .pr_drain = sctp_drain, 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 = NULL, /* Covered by the SOCK_SEQPACKET entry. */ 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|PR_CAPATTACH, 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. */ 317 IP6PROTOSPACER, 318 IP6PROTOSPACER, 319 IP6PROTOSPACER, 320 IP6PROTOSPACER, 321 IP6PROTOSPACER, 322 IP6PROTOSPACER, 323 IP6PROTOSPACER, 324 IP6PROTOSPACER, 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 }; 336 337 struct domain inet6domain = { 338 .dom_family = AF_INET6, 339 .dom_name = "internet6", 340 .dom_protosw = (struct protosw *)inet6sw, 341 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], 342 .dom_rtattach = in6_inithead, 343 #ifdef VIMAGE 344 .dom_rtdetach = in6_detachhead, 345 #endif 346 .dom_ifattach = in6_domifattach, 347 .dom_ifdetach = in6_domifdetach, 348 .dom_ifmtu = in6_domifmtu 349 }; 350 351 VNET_DOMAIN_SET(inet6); 352 353 /* 354 * Internet configuration info 355 */ 356 #ifndef IPV6FORWARDING 357 #ifdef GATEWAY6 358 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 359 #else 360 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 361 #endif /* GATEWAY6 */ 362 #endif /* !IPV6FORWARDING */ 363 364 #ifndef IPV6_SENDREDIRECTS 365 #define IPV6_SENDREDIRECTS 1 366 #endif 367 368 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 369 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 370 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 371 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 372 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 373 VNET_DEFINE(int, ip6_no_radr) = 0; 374 VNET_DEFINE(int, ip6_norbit_raif) = 0; 375 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 376 VNET_DEFINE(int, ip6_log_interval) = 5; 377 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 378 * process? */ 379 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 380 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 381 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 382 * (RFC2462 5.5.4) */ 383 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 384 * walk list every 5 sec. */ 385 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 386 VNET_DEFINE(int, ip6_v6only) = 1; 387 388 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 389 #ifdef IPSTEALTH 390 VNET_DEFINE(int, ip6stealth) = 0; 391 #endif 392 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 393 * (RFC 4861) */ 394 395 /* icmp6 */ 396 /* 397 * BSDI4 defines these variables in in_proto.c... 398 * XXX: what if we don't define INET? Should we define pmtu6_expire 399 * or so? (jinmei@kame.net 19990310) 400 */ 401 VNET_DEFINE(int, pmtu_expire) = 60*10; 402 VNET_DEFINE(int, pmtu_probe) = 60*2; 403 404 /* ICMPV6 parameters */ 405 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 406 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 407 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 408 /* control how to respond to NI queries */ 409 VNET_DEFINE(int, icmp6_nodeinfo) = 410 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 411 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 412 413 /* 414 * sysctl related items. 415 */ 416 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 417 "Internet6 Family"); 418 419 /* net.inet6 */ 420 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 421 "IP6"); 422 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 423 "ICMP6"); 424 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 425 "UDP6"); 426 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 427 "TCP6"); 428 #if defined(SCTP) || defined(SCTP_SUPPORT) 429 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 430 "SCTP6"); 431 #endif 432 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 433 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 434 "IPSEC6"); 435 #endif /* IPSEC */ 436 437 /* net.inet6.ip6 */ 438 static int 439 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 440 { 441 int error, val; 442 443 val = V_ip6_temp_preferred_lifetime; 444 error = sysctl_handle_int(oidp, &val, 0, req); 445 if (error != 0 || !req->newptr) 446 return (error); 447 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 448 return (EINVAL); 449 V_ip6_temp_preferred_lifetime = val; 450 return (0); 451 } 452 453 static int 454 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 455 { 456 int error, val; 457 458 val = V_ip6_temp_valid_lifetime; 459 error = sysctl_handle_int(oidp, &val, 0, req); 460 if (error != 0 || !req->newptr) 461 return (error); 462 if (val < V_ip6_temp_preferred_lifetime) 463 return (EINVAL); 464 V_ip6_temp_valid_lifetime = val; 465 return (0); 466 } 467 468 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 469 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 470 "Enable forwarding of IPv6 packets between interfaces"); 471 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 472 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 473 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 474 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 475 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 476 "Default hop limit to use for outgoing IPv6 packets"); 477 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 478 ip6stat, 479 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 480 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 481 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 482 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 483 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 484 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 485 "Default value of per-interface flag to control whether routers " 486 "sending ICMPv6 RA messages on that interface are added into the " 487 "default router list"); 488 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 489 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 490 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 491 "on the interface"); 492 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 493 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 494 "Accept the default router list from ICMPv6 RA messages even " 495 "when packet forwarding is enabled"); 496 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 497 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 498 "Frequency in seconds at which to log IPv6 forwarding errors"); 499 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 500 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 501 "Default maximum number of IPv6 extension headers permitted on " 502 "incoming IPv6 packets, 0 for no artificial limit"); 503 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 504 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 505 "Number of ICMPv6 NS messages sent during duplicate address detection"); 506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 508 "Provide an IPv6 flowlabel in outbound packets"); 509 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 510 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 511 "Default hop limit for IPv6 multicast packets originating from this " 512 "node"); 513 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 514 CTLFLAG_RD, __KAME_VERSION, 0, 515 "KAME version string"); 516 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 517 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 518 "Allow the use of addresses whose preferred lifetimes have expired"); 519 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 520 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 521 ""); /* XXX unused */ 522 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 523 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 524 "Create RFC3041 temporary addresses for autoconfigured addresses"); 525 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 526 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 527 NULL, 0, sysctl_ip6_temppltime, "I", 528 "Maximum preferred lifetime for temporary addresses"); 529 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 530 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 531 NULL, 0, sysctl_ip6_tempvltime, "I", 532 "Maximum valid lifetime for temporary addresses"); 533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 534 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 535 "Restrict AF_INET6 sockets to IPv6 addresses only"); 536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 538 "Default value of per-interface flag for automatically adding an IPv6 " 539 "link-local address to interfaces when attached"); 540 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 541 struct rip6stat, rip6stat, 542 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 543 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 544 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 545 "Prefer RFC3041 temporary addresses in source address selection"); 546 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 547 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 548 "Use the default scope zone when none is specified"); 549 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 550 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 551 "Enable path MTU discovery for multicast packets"); 552 #ifdef IPSTEALTH 553 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 554 &VNET_NAME(ip6stealth), 0, 555 "Forward IPv6 packets without decrementing their TTL"); 556 #endif 557 558 /* net.inet6.icmp6 */ 559 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 560 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 561 "Accept ICMPv6 redirect messages"); 562 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 563 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 564 "Delay in seconds before expiring redirect route"); 565 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 566 struct icmp6stat, icmp6stat, 567 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 568 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 569 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 570 "Frequency in seconds of checks for expired prefixes and routers"); 571 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 572 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 573 "Delay in seconds before probing for reachability"); 574 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 575 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 576 "Number of ICMPv6 NS messages sent during reachability detection"); 577 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 578 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 579 "Number of ICMPv6 NS messages sent during address resolution"); 580 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 581 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 582 "Create a loopback route when configuring an IPv6 address"); 583 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 584 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 585 "Mask of enabled RFC4620 node information query types"); 586 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 587 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 588 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 589 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 590 "for compatibility with KAME implementation"); 591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 592 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 593 "Maximum number of ICMPv6 error messages per second"); 594 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 595 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 596 ""); /* XXX unused */ 597 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 598 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 599 "Log NDP debug messages"); 600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 601 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 602 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 603 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 604 #ifdef EXPERIMENTAL 605 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 606 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 607 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 608 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 609 "draft-ietf-6man-ipv6only-flag"); 610 #endif 611