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_mpath.h" 74 #include "opt_route.h" 75 76 #include <sys/param.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/proc.h> 80 #include <sys/protosw.h> 81 #include <sys/jail.h> 82 #include <sys/kernel.h> 83 #include <sys/malloc.h> 84 #include <sys/domain.h> 85 #include <sys/mbuf.h> 86 #include <sys/systm.h> 87 #include <sys/sysctl.h> 88 89 #include <net/if.h> 90 #include <net/if_var.h> 91 #include <net/radix.h> 92 #include <net/route.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_systm.h> 96 #include <netinet/in_var.h> 97 #include <netinet/ip_encap.h> 98 #include <netinet/ip.h> 99 #include <netinet/ip_var.h> 100 #include <netinet/ip6.h> 101 #include <netinet6/ip6_var.h> 102 #include <netinet/icmp6.h> 103 104 #include <netinet/tcp.h> 105 #include <netinet/tcp_timer.h> 106 #include <netinet/tcp_var.h> 107 #include <netinet/udp.h> 108 #include <netinet/udp_var.h> 109 #include <netinet6/tcp6_var.h> 110 #include <netinet6/raw_ip6.h> 111 #include <netinet6/udp6_var.h> 112 #include <netinet6/pim6_var.h> 113 #include <netinet6/nd6.h> 114 115 #ifdef SCTP 116 #include <netinet/in_pcb.h> 117 #include <netinet/sctp_pcb.h> 118 #include <netinet/sctp.h> 119 #include <netinet/sctp_var.h> 120 #include <netinet6/sctp6_var.h> 121 #endif /* SCTP */ 122 123 #include <netinet6/ip6protosw.h> 124 125 /* 126 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 127 */ 128 FEATURE(inet6, "Internet Protocol version 6"); 129 130 extern struct domain inet6domain; 131 static struct pr_usrreqs nousrreqs; 132 133 #define PR_LISTEN 0 134 #define PR_ABRTACPTDIS 0 135 136 /* Spacer for loadable protocols. */ 137 #define IP6PROTOSPACER \ 138 { \ 139 .pr_domain = &inet6domain, \ 140 .pr_protocol = PROTO_SPACER, \ 141 .pr_usrreqs = &nousrreqs \ 142 } 143 144 struct protosw inet6sw[] = { 145 { 146 .pr_type = 0, 147 .pr_domain = &inet6domain, 148 .pr_protocol = IPPROTO_IPV6, 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, 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|PR_LISTEN, 172 .pr_input = tcp6_input, 173 .pr_ctlinput = tcp6_ctlinput, 174 .pr_ctloutput = tcp_ctloutput, 175 #ifndef INET /* don't call initialization, timeout, and drain routines twice */ 176 .pr_init = tcp_init, 177 .pr_slowtimo = tcp_slowtimo, 178 .pr_drain = tcp_drain, 179 #endif 180 .pr_usrreqs = &tcp6_usrreqs, 181 }, 182 #ifdef SCTP 183 { 184 .pr_type = SOCK_SEQPACKET, 185 .pr_domain = &inet6domain, 186 .pr_protocol = IPPROTO_SCTP, 187 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 188 .pr_input = sctp6_input, 189 .pr_ctlinput = sctp6_ctlinput, 190 .pr_ctloutput = sctp_ctloutput, 191 #ifndef INET /* Do not call initialization and drain routines twice. */ 192 .pr_drain = sctp_drain, 193 .pr_init = sctp_init, 194 #endif 195 .pr_usrreqs = &sctp6_usrreqs 196 }, 197 { 198 .pr_type = SOCK_STREAM, 199 .pr_domain = &inet6domain, 200 .pr_protocol = IPPROTO_SCTP, 201 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 202 .pr_input = sctp6_input, 203 .pr_ctlinput = sctp6_ctlinput, 204 .pr_ctloutput = sctp_ctloutput, 205 .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */ 206 .pr_usrreqs = &sctp6_usrreqs 207 }, 208 #endif /* SCTP */ 209 { 210 .pr_type = SOCK_DGRAM, 211 .pr_domain = &inet6domain, 212 .pr_protocol = IPPROTO_UDPLITE, 213 .pr_flags = PR_ATOMIC|PR_ADDR, 214 .pr_input = udp6_input, 215 .pr_ctlinput = udplite6_ctlinput, 216 .pr_ctloutput = udp_ctloutput, 217 #ifndef INET /* Do not call initialization twice. */ 218 .pr_init = udplite_init, 219 #endif 220 .pr_usrreqs = &udp6_usrreqs, 221 }, 222 { 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inet6domain, 225 .pr_protocol = IPPROTO_RAW, 226 .pr_flags = PR_ATOMIC|PR_ADDR, 227 .pr_input = rip6_input, 228 .pr_output = rip6_output, 229 .pr_ctlinput = rip6_ctlinput, 230 .pr_ctloutput = rip6_ctloutput, 231 #ifndef INET /* Do not call initialization twice. */ 232 .pr_init = rip_init, 233 #endif 234 .pr_usrreqs = &rip6_usrreqs 235 }, 236 { 237 .pr_type = SOCK_RAW, 238 .pr_domain = &inet6domain, 239 .pr_protocol = IPPROTO_ICMPV6, 240 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 241 .pr_input = icmp6_input, 242 .pr_output = rip6_output, 243 .pr_ctlinput = rip6_ctlinput, 244 .pr_ctloutput = rip6_ctloutput, 245 .pr_fasttimo = icmp6_fasttimo, 246 .pr_slowtimo = icmp6_slowtimo, 247 .pr_usrreqs = &rip6_usrreqs 248 }, 249 { 250 .pr_type = SOCK_RAW, 251 .pr_domain = &inet6domain, 252 .pr_protocol = IPPROTO_DSTOPTS, 253 .pr_flags = PR_ATOMIC|PR_ADDR, 254 .pr_input = dest6_input, 255 .pr_usrreqs = &nousrreqs 256 }, 257 { 258 .pr_type = SOCK_RAW, 259 .pr_domain = &inet6domain, 260 .pr_protocol = IPPROTO_ROUTING, 261 .pr_flags = PR_ATOMIC|PR_ADDR, 262 .pr_input = route6_input, 263 .pr_usrreqs = &nousrreqs 264 }, 265 { 266 .pr_type = SOCK_RAW, 267 .pr_domain = &inet6domain, 268 .pr_protocol = IPPROTO_FRAGMENT, 269 .pr_flags = PR_ATOMIC|PR_ADDR, 270 .pr_input = frag6_input, 271 .pr_usrreqs = &nousrreqs 272 }, 273 #ifdef INET 274 { 275 .pr_type = SOCK_RAW, 276 .pr_domain = &inet6domain, 277 .pr_protocol = IPPROTO_IPV4, 278 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 279 .pr_input = encap6_input, 280 .pr_output = rip6_output, 281 .pr_ctloutput = rip6_ctloutput, 282 .pr_usrreqs = &rip6_usrreqs 283 }, 284 #endif /* INET */ 285 { 286 .pr_type = SOCK_RAW, 287 .pr_domain = &inet6domain, 288 .pr_protocol = IPPROTO_IPV6, 289 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 290 .pr_input = encap6_input, 291 .pr_output = rip6_output, 292 .pr_ctloutput = rip6_ctloutput, 293 .pr_usrreqs = &rip6_usrreqs 294 }, 295 { 296 .pr_type = SOCK_RAW, 297 .pr_domain = &inet6domain, 298 .pr_protocol = IPPROTO_GRE, 299 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 300 .pr_input = encap6_input, 301 .pr_output = rip6_output, 302 .pr_ctloutput = rip6_ctloutput, 303 .pr_usrreqs = &rip6_usrreqs 304 }, 305 { 306 .pr_type = SOCK_RAW, 307 .pr_domain = &inet6domain, 308 .pr_protocol = IPPROTO_PIM, 309 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 310 .pr_input = encap6_input, 311 .pr_output = rip6_output, 312 .pr_ctloutput = rip6_ctloutput, 313 .pr_usrreqs = &rip6_usrreqs 314 }, 315 /* Spacer n-times for loadable protocols. */ 316 IP6PROTOSPACER, 317 IP6PROTOSPACER, 318 IP6PROTOSPACER, 319 IP6PROTOSPACER, 320 IP6PROTOSPACER, 321 IP6PROTOSPACER, 322 IP6PROTOSPACER, 323 IP6PROTOSPACER, 324 /* raw wildcard */ 325 { 326 .pr_type = SOCK_RAW, 327 .pr_domain = &inet6domain, 328 .pr_flags = PR_ATOMIC|PR_ADDR, 329 .pr_input = rip6_input, 330 .pr_output = rip6_output, 331 .pr_ctloutput = rip6_ctloutput, 332 .pr_usrreqs = &rip6_usrreqs 333 }, 334 }; 335 336 extern int in6_inithead(void **, int, u_int); 337 #ifdef VIMAGE 338 extern int in6_detachhead(void **, int); 339 #endif 340 341 struct domain inet6domain = { 342 .dom_family = AF_INET6, 343 .dom_name = "internet6", 344 .dom_protosw = (struct protosw *)inet6sw, 345 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], 346 .dom_rtattach = in6_inithead, 347 #ifdef VIMAGE 348 .dom_rtdetach = in6_detachhead, 349 #endif 350 .dom_ifattach = in6_domifattach, 351 .dom_ifdetach = in6_domifdetach, 352 .dom_ifmtu = in6_domifmtu 353 }; 354 355 VNET_DOMAIN_SET(inet6); 356 357 /* 358 * Internet configuration info 359 */ 360 #ifndef IPV6FORWARDING 361 #ifdef GATEWAY6 362 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 363 #else 364 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 365 #endif /* GATEWAY6 */ 366 #endif /* !IPV6FORWARDING */ 367 368 #ifndef IPV6_SENDREDIRECTS 369 #define IPV6_SENDREDIRECTS 1 370 #endif 371 372 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 373 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 374 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 375 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 376 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 377 VNET_DEFINE(int, ip6_no_radr) = 0; 378 VNET_DEFINE(int, ip6_norbit_raif) = 0; 379 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 380 VNET_DEFINE(int, ip6_log_interval) = 5; 381 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 382 * process? */ 383 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 384 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 385 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 386 * (RFC2462 5.5.4) */ 387 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 388 * walk list every 5 sec. */ 389 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 390 VNET_DEFINE(int, ip6_v6only) = 1; 391 392 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 393 #ifdef IPSTEALTH 394 VNET_DEFINE(int, ip6stealth) = 0; 395 #endif 396 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 397 * (RFC 4861) */ 398 399 /* icmp6 */ 400 /* 401 * BSDI4 defines these variables in in_proto.c... 402 * XXX: what if we don't define INET? Should we define pmtu6_expire 403 * or so? (jinmei@kame.net 19990310) 404 */ 405 VNET_DEFINE(int, pmtu_expire) = 60*10; 406 VNET_DEFINE(int, pmtu_probe) = 60*2; 407 408 /* ICMPV6 parameters */ 409 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 410 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 411 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 412 /* control how to respond to NI queries */ 413 VNET_DEFINE(int, icmp6_nodeinfo) = 414 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 415 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 416 417 /* 418 * sysctl related items. 419 */ 420 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 421 "Internet6 Family"); 422 423 /* net.inet6 */ 424 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 425 "IP6"); 426 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 427 "ICMP6"); 428 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 429 "UDP6"); 430 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 431 "TCP6"); 432 #if defined(SCTP) || defined(SCTP_SUPPORT) 433 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 434 "SCTP6"); 435 #endif 436 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 437 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 438 "IPSEC6"); 439 #endif /* IPSEC */ 440 441 /* net.inet6.ip6 */ 442 static int 443 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 444 { 445 int error, val; 446 447 val = V_ip6_temp_preferred_lifetime; 448 error = sysctl_handle_int(oidp, &val, 0, req); 449 if (error != 0 || !req->newptr) 450 return (error); 451 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 452 return (EINVAL); 453 V_ip6_temp_preferred_lifetime = val; 454 return (0); 455 } 456 457 static int 458 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 459 { 460 int error, val; 461 462 val = V_ip6_temp_valid_lifetime; 463 error = sysctl_handle_int(oidp, &val, 0, req); 464 if (error != 0 || !req->newptr) 465 return (error); 466 if (val < V_ip6_temp_preferred_lifetime) 467 return (EINVAL); 468 V_ip6_temp_valid_lifetime = val; 469 return (0); 470 } 471 472 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 473 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 474 "Enable forwarding of IPv6 packets between interfaces"); 475 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 476 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 477 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 478 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 479 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 480 "Default hop limit to use for outgoing IPv6 packets"); 481 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 482 ip6stat, 483 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 484 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 485 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 486 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 487 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 488 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 489 "Default value of per-interface flag to control whether routers " 490 "sending ICMPv6 RA messages on that interface are added into the " 491 "default router list"); 492 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 493 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 494 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 495 "on the interface"); 496 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 497 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 498 "Accept the default router list from ICMPv6 RA messages even " 499 "when packet forwarding is enabled"); 500 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 501 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 502 "Frequency in seconds at which to log IPv6 forwarding errors"); 503 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 504 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 505 "Default maximum number of IPv6 extension headers permitted on " 506 "incoming IPv6 packets, 0 for no artificial limit"); 507 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 508 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 509 "Number of ICMPv6 NS messages sent during duplicate address detection"); 510 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 511 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 512 "Provide an IPv6 flowlabel in outbound packets"); 513 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 514 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 515 "Default hop limit for IPv6 multicast packets originating from this " 516 "node"); 517 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 518 CTLFLAG_RD, __KAME_VERSION, 0, 519 "KAME version string"); 520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 521 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 522 "Allow the use of addresses whose preferred lifetimes have expired"); 523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 524 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 525 ""); /* XXX unused */ 526 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 527 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 528 "Create RFC3041 temporary addresses for autoconfigured addresses"); 529 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 530 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 531 NULL, 0, sysctl_ip6_temppltime, "I", 532 "Maximum preferred lifetime for temporary addresses"); 533 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 534 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 535 NULL, 0, sysctl_ip6_tempvltime, "I", 536 "Maximum valid lifetime for temporary addresses"); 537 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 538 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 539 "Restrict AF_INET6 sockets to IPv6 addresses only"); 540 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 541 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 542 "Default value of per-interface flag for automatically adding an IPv6 " 543 "link-local address to interfaces when attached"); 544 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 545 struct rip6stat, rip6stat, 546 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 548 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 549 "Prefer RFC3041 temporary addresses in source address selection"); 550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 551 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 552 "Use the default scope zone when none is specified"); 553 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 554 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 555 "Enable path MTU discovery for multicast packets"); 556 #ifdef IPSTEALTH 557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 558 &VNET_NAME(ip6stealth), 0, 559 "Forward IPv6 packets without decrementing their TTL"); 560 #endif 561 562 /* net.inet6.icmp6 */ 563 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 564 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 565 "Accept ICMPv6 redirect messages"); 566 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 567 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 568 "Delay in seconds before expiring redirect route"); 569 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 570 struct icmp6stat, icmp6stat, 571 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 572 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 573 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 574 "Frequency in seconds of checks for expired prefixes and routers"); 575 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 576 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 577 "Delay in seconds before probing for reachability"); 578 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 579 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 580 "Number of ICMPv6 NS messages sent during reachability detection"); 581 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 582 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 583 "Number of ICMPv6 NS messages sent during address resolution"); 584 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 585 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 586 "Create a loopback route when configuring an IPv6 address"); 587 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 588 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 589 "Mask of enabled RF4620 node information query types"); 590 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 591 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 592 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 593 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 594 "for compatibility with KAME implementation"); 595 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 596 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 597 "Maximum number of ICMPv6 error messages per second"); 598 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 599 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 600 ""); /* XXX unused */ 601 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 602 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 603 "Log NDP debug messages"); 604 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 605 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 606 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 607 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 608 #ifdef EXPERIMENTAL 609 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 610 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 611 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 612 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 613 "draft-ietf-6man-ipv6only-flag"); 614 #endif 615