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sys/netinet6/in6_proto.c
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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 #ifdef RADIX_MPATH 94 #include <net/radix_mpath.h> 95 #endif 96 97 #include <netinet/in.h> 98 #include <netinet/in_systm.h> 99 #include <netinet/in_var.h> 100 #include <netinet/ip_encap.h> 101 #include <netinet/ip.h> 102 #include <netinet/ip_var.h> 103 #include <netinet/ip6.h> 104 #include <netinet6/ip6_var.h> 105 #include <netinet/icmp6.h> 106 107 #include <netinet/tcp.h> 108 #include <netinet/tcp_timer.h> 109 #include <netinet/tcp_var.h> 110 #include <netinet/udp.h> 111 #include <netinet/udp_var.h> 112 #include <netinet6/tcp6_var.h> 113 #include <netinet6/raw_ip6.h> 114 #include <netinet6/udp6_var.h> 115 #include <netinet6/pim6_var.h> 116 #include <netinet6/nd6.h> 117 118 #ifdef SCTP 119 #include <netinet/in_pcb.h> 120 #include <netinet/sctp_pcb.h> 121 #include <netinet/sctp.h> 122 #include <netinet/sctp_var.h> 123 #include <netinet6/sctp6_var.h> 124 #endif /* SCTP */ 125 126 #include <netinet6/ip6protosw.h> 127 128 /* 129 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 130 */ 131 FEATURE(inet6, "Internet Protocol version 6"); 132 133 extern struct domain inet6domain; 134 static struct pr_usrreqs nousrreqs; 135 136 #define PR_LISTEN 0 137 #define PR_ABRTACPTDIS 0 138 139 /* Spacer for loadable protocols. */ 140 #define IP6PROTOSPACER \ 141 { \ 142 .pr_domain = &inet6domain, \ 143 .pr_protocol = PROTO_SPACER, \ 144 .pr_usrreqs = &nousrreqs \ 145 } 146 147 struct protosw inet6sw[] = { 148 { 149 .pr_type = 0, 150 .pr_domain = &inet6domain, 151 .pr_protocol = IPPROTO_IPV6, 152 .pr_init = ip6_init, 153 .pr_slowtimo = frag6_slowtimo, 154 .pr_drain = frag6_drain, 155 .pr_usrreqs = &nousrreqs, 156 }, 157 { 158 .pr_type = SOCK_DGRAM, 159 .pr_domain = &inet6domain, 160 .pr_protocol = IPPROTO_UDP, 161 .pr_flags = PR_ATOMIC|PR_ADDR, 162 .pr_input = udp6_input, 163 .pr_ctlinput = udp6_ctlinput, 164 .pr_ctloutput = ip6_ctloutput, 165 #ifndef INET /* Do not call initialization twice. */ 166 .pr_init = udp_init, 167 #endif 168 .pr_usrreqs = &udp6_usrreqs, 169 }, 170 { 171 .pr_type = SOCK_STREAM, 172 .pr_domain = &inet6domain, 173 .pr_protocol = IPPROTO_TCP, 174 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_LISTEN, 175 .pr_input = tcp6_input, 176 .pr_ctlinput = tcp6_ctlinput, 177 .pr_ctloutput = tcp_ctloutput, 178 #ifndef INET /* don't call initialization and timeout routines twice */ 179 .pr_init = tcp_init, 180 .pr_slowtimo = tcp_slowtimo, 181 #endif 182 .pr_drain = tcp_drain, 183 .pr_usrreqs = &tcp6_usrreqs, 184 }, 185 #ifdef SCTP 186 { 187 .pr_type = SOCK_SEQPACKET, 188 .pr_domain = &inet6domain, 189 .pr_protocol = IPPROTO_SCTP, 190 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 191 .pr_input = sctp6_input, 192 .pr_ctlinput = sctp6_ctlinput, 193 .pr_ctloutput = sctp_ctloutput, 194 .pr_drain = sctp_drain, 195 #ifndef INET /* Do not call initialization twice. */ 196 .pr_init = sctp_init, 197 #endif 198 .pr_usrreqs = &sctp6_usrreqs 199 }, 200 { 201 .pr_type = SOCK_STREAM, 202 .pr_domain = &inet6domain, 203 .pr_protocol = IPPROTO_SCTP, 204 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 205 .pr_input = sctp6_input, 206 .pr_ctlinput = sctp6_ctlinput, 207 .pr_ctloutput = sctp_ctloutput, 208 .pr_drain = sctp_drain, 209 .pr_usrreqs = &sctp6_usrreqs 210 }, 211 #endif /* SCTP */ 212 { 213 .pr_type = SOCK_DGRAM, 214 .pr_domain = &inet6domain, 215 .pr_protocol = IPPROTO_UDPLITE, 216 .pr_flags = PR_ATOMIC|PR_ADDR, 217 .pr_input = udp6_input, 218 .pr_ctlinput = udplite6_ctlinput, 219 .pr_ctloutput = udp_ctloutput, 220 #ifndef INET /* Do not call initialization twice. */ 221 .pr_init = udplite_init, 222 #endif 223 .pr_usrreqs = &udp6_usrreqs, 224 }, 225 { 226 .pr_type = SOCK_RAW, 227 .pr_domain = &inet6domain, 228 .pr_protocol = IPPROTO_RAW, 229 .pr_flags = PR_ATOMIC|PR_ADDR, 230 .pr_input = rip6_input, 231 .pr_output = rip6_output, 232 .pr_ctlinput = rip6_ctlinput, 233 .pr_ctloutput = rip6_ctloutput, 234 #ifndef INET /* Do not call initialization twice. */ 235 .pr_init = rip_init, 236 #endif 237 .pr_usrreqs = &rip6_usrreqs 238 }, 239 { 240 .pr_type = SOCK_RAW, 241 .pr_domain = &inet6domain, 242 .pr_protocol = IPPROTO_ICMPV6, 243 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 244 .pr_input = icmp6_input, 245 .pr_output = rip6_output, 246 .pr_ctlinput = rip6_ctlinput, 247 .pr_ctloutput = rip6_ctloutput, 248 .pr_fasttimo = icmp6_fasttimo, 249 .pr_slowtimo = icmp6_slowtimo, 250 .pr_usrreqs = &rip6_usrreqs 251 }, 252 { 253 .pr_type = SOCK_RAW, 254 .pr_domain = &inet6domain, 255 .pr_protocol = IPPROTO_DSTOPTS, 256 .pr_flags = PR_ATOMIC|PR_ADDR, 257 .pr_input = dest6_input, 258 .pr_usrreqs = &nousrreqs 259 }, 260 { 261 .pr_type = SOCK_RAW, 262 .pr_domain = &inet6domain, 263 .pr_protocol = IPPROTO_ROUTING, 264 .pr_flags = PR_ATOMIC|PR_ADDR, 265 .pr_input = route6_input, 266 .pr_usrreqs = &nousrreqs 267 }, 268 { 269 .pr_type = SOCK_RAW, 270 .pr_domain = &inet6domain, 271 .pr_protocol = IPPROTO_FRAGMENT, 272 .pr_flags = PR_ATOMIC|PR_ADDR, 273 .pr_input = frag6_input, 274 .pr_usrreqs = &nousrreqs 275 }, 276 #ifdef INET 277 { 278 .pr_type = SOCK_RAW, 279 .pr_domain = &inet6domain, 280 .pr_protocol = IPPROTO_IPV4, 281 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 282 .pr_input = encap6_input, 283 .pr_output = rip6_output, 284 .pr_ctloutput = rip6_ctloutput, 285 .pr_usrreqs = &rip6_usrreqs 286 }, 287 #endif /* INET */ 288 { 289 .pr_type = SOCK_RAW, 290 .pr_domain = &inet6domain, 291 .pr_protocol = IPPROTO_IPV6, 292 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 293 .pr_input = encap6_input, 294 .pr_output = rip6_output, 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_ETHERIP, 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 { 308 .pr_type = SOCK_RAW, 309 .pr_domain = &inet6domain, 310 .pr_protocol = IPPROTO_GRE, 311 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 312 .pr_input = encap6_input, 313 .pr_output = rip6_output, 314 .pr_ctloutput = rip6_ctloutput, 315 .pr_usrreqs = &rip6_usrreqs 316 }, 317 { 318 .pr_type = SOCK_RAW, 319 .pr_domain = &inet6domain, 320 .pr_protocol = IPPROTO_PIM, 321 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 322 .pr_input = encap6_input, 323 .pr_output = rip6_output, 324 .pr_ctloutput = rip6_ctloutput, 325 .pr_usrreqs = &rip6_usrreqs 326 }, 327 /* Spacer n-times for loadable protocols. */ 328 IP6PROTOSPACER, 329 IP6PROTOSPACER, 330 IP6PROTOSPACER, 331 IP6PROTOSPACER, 332 IP6PROTOSPACER, 333 IP6PROTOSPACER, 334 IP6PROTOSPACER, 335 IP6PROTOSPACER, 336 /* raw wildcard */ 337 { 338 .pr_type = SOCK_RAW, 339 .pr_domain = &inet6domain, 340 .pr_flags = PR_ATOMIC|PR_ADDR, 341 .pr_input = rip6_input, 342 .pr_output = rip6_output, 343 .pr_ctloutput = rip6_ctloutput, 344 .pr_usrreqs = &rip6_usrreqs 345 }, 346 }; 347 348 extern int in6_inithead(void **, int); 349 #ifdef VIMAGE 350 extern int in6_detachhead(void **, int); 351 #endif 352 353 struct domain inet6domain = { 354 .dom_family = AF_INET6, 355 .dom_name = "internet6", 356 .dom_protosw = (struct protosw *)inet6sw, 357 .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], 358 #ifdef RADIX_MPATH 359 .dom_rtattach = rn6_mpath_inithead, 360 #else 361 .dom_rtattach = in6_inithead, 362 #endif 363 #ifdef VIMAGE 364 .dom_rtdetach = in6_detachhead, 365 #endif 366 .dom_ifattach = in6_domifattach, 367 .dom_ifdetach = in6_domifdetach, 368 .dom_ifmtu = in6_domifmtu 369 }; 370 371 VNET_DOMAIN_SET(inet6); 372 373 /* 374 * Internet configuration info 375 */ 376 #ifndef IPV6FORWARDING 377 #ifdef GATEWAY6 378 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 379 #else 380 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 381 #endif /* GATEWAY6 */ 382 #endif /* !IPV6FORWARDING */ 383 384 #ifndef IPV6_SENDREDIRECTS 385 #define IPV6_SENDREDIRECTS 1 386 #endif 387 388 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 389 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 390 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 391 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 392 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 393 VNET_DEFINE(int, ip6_no_radr) = 0; 394 VNET_DEFINE(int, ip6_norbit_raif) = 0; 395 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 396 VNET_DEFINE(int, ip6_log_interval) = 5; 397 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 398 * process? */ 399 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 400 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 401 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 402 * (RFC2462 5.5.4) */ 403 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 404 * walk list every 5 sec. */ 405 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 406 VNET_DEFINE(int, ip6_v6only) = 1; 407 408 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 409 #ifdef IPSTEALTH 410 VNET_DEFINE(int, ip6stealth) = 0; 411 #endif 412 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 413 * (RFC 4861) */ 414 415 /* icmp6 */ 416 /* 417 * BSDI4 defines these variables in in_proto.c... 418 * XXX: what if we don't define INET? Should we define pmtu6_expire 419 * or so? (jinmei@kame.net 19990310) 420 */ 421 VNET_DEFINE(int, pmtu_expire) = 60*10; 422 VNET_DEFINE(int, pmtu_probe) = 60*2; 423 424 /* ICMPV6 parameters */ 425 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 426 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 427 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 428 /* control how to respond to NI queries */ 429 VNET_DEFINE(int, icmp6_nodeinfo) = 430 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 431 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 432 433 /* 434 * sysctl related items. 435 */ 436 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0, 437 "Internet6 Family"); 438 439 /* net.inet6 */ 440 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6"); 441 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6"); 442 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6"); 443 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6"); 444 #if defined(SCTP) || defined(SCTP_SUPPORT) 445 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW, 0, "SCTP6"); 446 #endif 447 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 448 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6"); 449 #endif /* IPSEC */ 450 451 /* net.inet6.ip6 */ 452 static int 453 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 454 { 455 int error, val; 456 457 val = V_ip6_temp_preferred_lifetime; 458 error = sysctl_handle_int(oidp, &val, 0, req); 459 if (error != 0 || !req->newptr) 460 return (error); 461 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 462 return (EINVAL); 463 V_ip6_temp_preferred_lifetime = val; 464 return (0); 465 } 466 467 static int 468 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 469 { 470 int error, val; 471 472 val = V_ip6_temp_valid_lifetime; 473 error = sysctl_handle_int(oidp, &val, 0, req); 474 if (error != 0 || !req->newptr) 475 return (error); 476 if (val < V_ip6_temp_preferred_lifetime) 477 return (EINVAL); 478 V_ip6_temp_valid_lifetime = val; 479 return (0); 480 } 481 482 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 483 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 484 "Enable forwarding of IPv6 packets between interfaces"); 485 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 486 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 487 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 488 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 489 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 490 "Default hop limit to use for outgoing IPv6 packets"); 491 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 492 ip6stat, 493 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 494 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 495 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 496 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 497 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 498 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 499 "Default value of per-interface flag to control whether routers " 500 "sending ICMPv6 RA messages on that interface are added into the " 501 "default router list"); 502 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 503 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 504 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 505 "on the interface"); 506 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 508 "Accept the default router list from ICMPv6 RA messages even " 509 "when packet forwarding is enabled"); 510 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 511 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 512 "Frequency in seconds at which to log IPv6 forwarding errors"); 513 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 514 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 515 "Default maximum number of IPv6 extension headers permitted on " 516 "incoming IPv6 packets, 0 for no artificial limit"); 517 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 518 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 519 "Number of ICMPv6 NS messages sent during duplicate address detection"); 520 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 521 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 522 "Provide an IPv6 flowlabel in outbound packets"); 523 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 524 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 525 "Default hop limit for IPv6 multicast packets originating from this " 526 "node"); 527 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 528 CTLFLAG_RD, __KAME_VERSION, 0, 529 "KAME version string"); 530 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 531 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 532 "Allow the use of addresses whose preferred lifetimes have expired"); 533 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 534 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 535 ""); /* XXX unused */ 536 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 537 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 538 "Create RFC3041 temporary addresses for autoconfigured addresses"); 539 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 540 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW, 541 NULL, 0, sysctl_ip6_temppltime, "I", 542 "Maximum preferred lifetime for temporary addresses"); 543 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 544 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW, 545 NULL, 0, sysctl_ip6_tempvltime, "I", 546 "Maximum valid lifetime for temporary addresses"); 547 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 548 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 549 "Restrict AF_INET6 sockets to IPv6 addresses only"); 550 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 551 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 552 "Default value of per-interface flag for automatically adding an IPv6 " 553 "link-local address to interfaces when attached"); 554 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 555 struct rip6stat, rip6stat, 556 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 557 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 558 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 559 "Prefer RFC3041 temporary addresses in source address selection"); 560 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 561 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 562 "Use the default scope zone when none is specified"); 563 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 564 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 565 "Enable path MTU discovery for multicast packets"); 566 #ifdef IPSTEALTH 567 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 568 &VNET_NAME(ip6stealth), 0, 569 "Forward IPv6 packets without decrementing their TTL"); 570 #endif 571 572 /* net.inet6.icmp6 */ 573 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 574 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 575 "Accept ICMPv6 redirect messages"); 576 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 577 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 578 ""); /* XXX unused */ 579 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 580 struct icmp6stat, icmp6stat, 581 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 582 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 583 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 584 "Frequency in seconds of checks for expired prefixes and routers"); 585 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 586 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 587 "Delay in seconds before probing for reachability"); 588 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 589 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 590 "Number of ICMPv6 NS messages sent during reachability detection"); 591 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 592 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 593 "Number of ICMPv6 NS messages sent during address resolution"); 594 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 595 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 596 "Create a loopback route when configuring an IPv6 address"); 597 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 598 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 599 "Mask of enabled RFC4620 node information query types"); 600 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 601 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 602 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 603 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 604 "for compatibility with KAME implementation"); 605 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 606 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 607 "Maximum number of ICMPv6 error messages per second"); 608 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 609 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 610 ""); /* XXX unused */ 611 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 612 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 613 "Log NDP debug messages"); 614 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 615 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 616 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 617 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861");
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