1 /* $FreeBSD: src/sys/netinet6/in6_proto.c,v 1.6.2.9 2003/01/24 05:11:35 sam Exp $ */ 2 /* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 62 */ 63 64 #include "opt_inet.h" 65 #include "opt_inet6.h" 66 #include "opt_carp.h" 67 68 #include <sys/param.h> 69 #include <sys/socket.h> 70 #include <sys/socketvar.h> 71 #include <sys/protosw.h> 72 #include <sys/kernel.h> 73 #include <sys/domain.h> 74 #include <sys/mbuf.h> 75 #include <sys/systm.h> 76 #include <sys/sysctl.h> 77 78 #include <net/if.h> 79 #include <net/radix.h> 80 #include <net/route.h> 81 82 #include <netinet/in.h> 83 #include <netinet/in_systm.h> 84 #include <netinet/in_var.h> 85 #include <netinet/ip_encap.h> 86 #include <netinet/ip.h> 87 #include <netinet/ip_var.h> 88 #include <netinet/ip6.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet/icmp6.h> 91 92 #include <netinet/tcp.h> 93 #include <netinet/tcp_timer.h> 94 #include <netinet/tcp_var.h> 95 #include <netinet/udp.h> 96 #include <netinet/udp_var.h> 97 #include <netinet6/tcp6_var.h> 98 #include <netinet6/raw_ip6.h> 99 #include <netinet6/udp6_var.h> 100 #include <netinet6/pim6_var.h> 101 #include <netinet6/nd6.h> 102 103 #include <netinet6/ip6protosw.h> 104 105 #include <net/net_osdep.h> 106 107 #ifdef CARP 108 #include <netinet/ip_carp.h> 109 #endif 110 111 112 /* 113 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 114 */ 115 116 extern struct domain inet6domain; 117 static struct pr_usrreqs nousrreqs; 118 119 #define PR_LISTEN 0 120 #define PR_ABRTACPTDIS 0 121 122 struct protosw inet6sw[] = { 123 { 124 .pr_type = 0, 125 .pr_domain = &inet6domain, 126 .pr_protocol = IPPROTO_IPV6, 127 .pr_flags = 0, 128 129 .pr_init = ip6_init, 130 .pr_drain = frag6_drain, 131 .pr_usrreqs = &nousrreqs 132 }, 133 { 134 .pr_type = SOCK_DGRAM, 135 .pr_domain = &inet6domain, 136 .pr_protocol = IPPROTO_UDP, 137 .pr_flags = PR_ATOMIC | PR_ADDR | PR_MPSAFE | PR_LASTHDR, 138 139 .pr_input = udp6_input, 140 .pr_output = 0, 141 .pr_ctlinput = udp6_ctlinput, 142 .pr_ctloutput = ip6_ctloutput_dispatch, 143 144 .pr_ctlport = cpu0_ctlport, 145 .pr_usrreqs = &udp6_usrreqs 146 }, 147 { 148 .pr_type = SOCK_STREAM, 149 .pr_domain = &inet6domain, 150 .pr_protocol = IPPROTO_TCP, 151 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN | 152 PR_MPSAFE | PR_LASTHDR | PR_ASYNC_SEND | PR_ASYNC_RCVD, 153 154 .pr_input = tcp6_input, 155 .pr_output = NULL, 156 .pr_ctlinput = tcp6_ctlinput, 157 .pr_ctloutput = tcp_ctloutput, 158 159 .pr_ctlport = cpu0_ctlport, 160 #ifndef INET 161 /* don't call initialization and timeout routines twice */ 162 .pr_init = tcp_init, 163 #endif 164 .pr_drain = tcp_drain, 165 .pr_usrreqs = &tcp6_usrreqs 166 }, 167 { 168 .pr_type = SOCK_RAW, 169 .pr_domain = &inet6domain, 170 .pr_protocol = IPPROTO_RAW, 171 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 172 173 .pr_input = rip6_input, 174 .pr_output = rip6_output, 175 .pr_ctlinput = rip6_ctlinput, 176 .pr_ctloutput = rip6_ctloutput, 177 178 .pr_ctlport = cpu0_ctlport, 179 .pr_usrreqs = &rip6_usrreqs 180 }, 181 { 182 .pr_type = SOCK_RAW, 183 .pr_domain = &inet6domain, 184 .pr_protocol = IPPROTO_ICMPV6, 185 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 186 187 .pr_input = icmp6_input, 188 .pr_output = rip6_output, 189 .pr_ctlinput = rip6_ctlinput, 190 .pr_ctloutput = rip6_ctloutput, 191 192 .pr_ctlport = cpu0_ctlport, 193 .pr_init = icmp6_init, 194 .pr_drain = NULL, 195 196 .pr_usrreqs = &rip6_usrreqs 197 }, 198 { 199 .pr_type = SOCK_RAW, 200 .pr_domain = &inet6domain, 201 .pr_protocol = IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR, 202 203 .pr_input = dest6_input, 204 .pr_output = NULL, 205 .pr_ctlinput = NULL, 206 .pr_ctloutput = NULL, 207 208 .pr_usrreqs = &nousrreqs 209 }, 210 { 211 .pr_type = SOCK_RAW, 212 .pr_domain = &inet6domain, 213 .pr_protocol = IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR, 214 215 .pr_input = route6_input, 216 .pr_output = NULL, 217 .pr_ctlinput = NULL, 218 .pr_ctloutput = NULL, 219 220 .pr_usrreqs = &nousrreqs 221 }, 222 { 223 .pr_type = SOCK_RAW, 224 .pr_domain = &inet6domain, 225 .pr_protocol = IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR, 226 227 .pr_input = frag6_input, 228 .pr_output = NULL, 229 .pr_ctlinput = NULL, 230 .pr_ctloutput = NULL, 231 232 .pr_usrreqs = &nousrreqs 233 }, 234 #ifdef INET 235 { 236 .pr_type = SOCK_RAW, 237 .pr_domain = &inet6domain, 238 .pr_protocol = IPPROTO_IPV4, 239 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 240 241 .pr_input = encap6_input, 242 .pr_output = rip6_output, 243 .pr_ctlinput = NULL, 244 .pr_ctloutput = rip6_ctloutput, 245 246 .pr_init = encap_init, 247 .pr_usrreqs = &rip6_usrreqs 248 }, 249 #endif /* INET */ 250 { 251 .pr_type = SOCK_RAW, 252 .pr_domain = &inet6domain, 253 .pr_protocol = IPPROTO_IPV6, 254 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 255 256 .pr_input = encap6_input, 257 .pr_output = rip6_output, 258 .pr_ctlinput = NULL, 259 .pr_ctloutput = rip6_ctloutput, 260 261 .pr_init = encap_init, 262 .pr_usrreqs = &rip6_usrreqs 263 }, 264 { 265 .pr_type = SOCK_RAW, 266 .pr_domain = &inet6domain, 267 .pr_protocol = IPPROTO_PIM, 268 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 269 270 .pr_input = pim6_input, 271 .pr_output = rip6_output, 272 .pr_ctlinput = NULL, 273 .pr_ctloutput = rip6_ctloutput, 274 275 .pr_usrreqs = &rip6_usrreqs 276 }, 277 #ifdef CARP 278 { 279 .pr_type = SOCK_RAW, 280 .pr_domain = &inet6domain, 281 .pr_protocol = IPPROTO_CARP, 282 .pr_flags = PR_ATOMIC|PR_ADDR, 283 284 .pr_input = carp6_proto_input, 285 .pr_output = rip6_output, 286 .pr_ctlinput = NULL, 287 .pr_ctloutput = rip6_ctloutput, 288 289 .pr_usrreqs = &rip6_usrreqs 290 }, 291 #endif /* CARP */ 292 293 /* raw wildcard */ 294 { 295 .pr_type = SOCK_RAW, 296 .pr_domain = &inet6domain, 297 .pr_protocol = 0, 298 .pr_flags = PR_ATOMIC|PR_ADDR, 299 300 .pr_input = rip6_input, 301 .pr_output = rip6_output, 302 .pr_ctlinput = NULL, 303 .pr_ctloutput = rip6_ctloutput, 304 305 .pr_usrreqs = &rip6_usrreqs 306 }, 307 }; 308 309 extern int in6_inithead (void **, int); 310 311 struct domain inet6domain = { 312 .dom_family = AF_INET6, 313 .dom_name = "internet6", 314 .dom_init = NULL, 315 .dom_externalize = NULL, 316 .dom_dispose = NULL, 317 .dom_protosw = inet6sw, 318 .dom_protoswNPROTOSW = &inet6sw[NELEM(inet6sw)], 319 .dom_next = SLIST_ENTRY_INITIALIZER, 320 .dom_rtattach = in6_inithead, 321 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr), 322 .dom_maxrtkey = sizeof(struct sockaddr_in6), 323 .dom_ifattach = in6_domifattach, 324 .dom_ifdetach = in6_domifdetach, 325 .dom_if_up = in6_if_up, 326 .dom_if_down = in6_if_down 327 }; 328 329 DOMAIN_SET(inet6); 330 331 /* 332 * Internet configuration info 333 */ 334 #ifndef IPV6FORWARDING 335 #ifdef GATEWAY6 336 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 337 #else 338 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 339 #endif /* GATEWAY6 */ 340 #endif /* !IPV6FORWARDING */ 341 342 #ifndef IPV6_SENDREDIRECTS 343 #define IPV6_SENDREDIRECTS 1 344 #endif 345 346 int nd6_onlink_ns_rfc4861 = 1; /* allow 'on-link' NS/NA (as in RFC 4861) */ 347 348 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 349 int ip6_sendredirects = IPV6_SENDREDIRECTS; 350 int ip6_defhlim = IPV6_DEFHLIM; 351 int ip6_minhlim = IPV6_MINHLIM; 352 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 353 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 354 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */ 355 int ip6_maxfrags; /* initialized in frag6.c:frag6_init() */ 356 int ip6_log_interval = 5; 357 int ip6_hdrnestlimit = 50; /* appropriate? */ 358 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 359 u_int32_t ip6_flow_seq; 360 int ip6_auto_flowlabel = 1; 361 int ip6_gif_hlim = 0; 362 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 363 int ip6_rr_prune = 5; /* router renumbering prefix 364 * walk list every 5 sec. */ 365 366 u_int32_t ip6_id = 0UL; 367 time_t ip6_log_time = (time_t)0L; 368 369 /* icmp6 */ 370 /* 371 * BSDI4 defines these variables in in_proto.c... 372 * XXX: what if we don't define INET? Should we define pmtu6_expire 373 * or so? (jinmei@kame.net 19990310) 374 */ 375 int pmtu_expire = 60*10; 376 int pmtu_probe = 60*2; 377 378 /* raw IP6 parameters */ 379 /* 380 * Nominal space allocated to a raw ip socket. 381 */ 382 #define RIPV6SNDQ 8192 383 #define RIPV6RCVQ 8192 384 385 u_long rip6_sendspace = RIPV6SNDQ; 386 u_long rip6_recvspace = RIPV6RCVQ; 387 388 /* ICMPV6 parameters */ 389 int icmp6_rediraccept = 1; /* accept and process redirects */ 390 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 391 int icmp6errppslim = 100; /* 100pps */ 392 int icmp6_nodeinfo = 3; /* enable/disable NI response */ 393 394 /* UDP on IP6 parameters */ 395 int udp6_sendspace = 9216; /* really max datagram size */ 396 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 397 /* 40 1K datagrams */ 398 399 /* 400 * sysctl related items. 401 */ 402 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0, 403 "Internet6 Family"); 404 405 /* net.inet6 */ 406 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6"); 407 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6"); 408 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6"); 409 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6"); 410 411 /* net.inet6.ip6 */ 412 static int 413 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 414 { 415 int error = 0; 416 int old; 417 418 error = SYSCTL_OUT(req, arg1, sizeof(int)); 419 if (error || !req->newptr) 420 return (error); 421 old = ip6_temp_preferred_lifetime; 422 error = SYSCTL_IN(req, arg1, sizeof(int)); 423 if (ip6_temp_preferred_lifetime < 424 ip6_desync_factor + ip6_temp_regen_advance) { 425 ip6_temp_preferred_lifetime = old; 426 return (EINVAL); 427 } 428 return (error); 429 } 430 431 static int 432 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 433 { 434 int error = 0; 435 int old; 436 437 error = SYSCTL_OUT(req, arg1, sizeof(int)); 438 if (error || !req->newptr) 439 return (error); 440 old = ip6_temp_valid_lifetime; 441 error = SYSCTL_IN(req, arg1, sizeof(int)); 442 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) { 443 ip6_temp_preferred_lifetime = old; 444 return (EINVAL); 445 } 446 return (error); 447 } 448 449 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW, 450 &ip6_forwarding, 0, "Enable IP forwarding between interfaces"); 451 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW, 452 &ip6_sendredirects, 0, "Enable sending IP redirects"); 453 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, 454 hlim, CTLFLAG_RW, &ip6_defhlim, 0, "Default hop limit"); 455 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MINHLIM, 456 minhlim, CTLFLAG_RW, &ip6_minhlim, 0, "Default hop limit"); 457 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD, 458 &ip6stat, ip6stat, "IP stats"); 459 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets, 460 CTLFLAG_RW, &ip6_maxfragpackets, 0, "Maximum packets in reassembly queue"); 461 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 462 CTLFLAG_RW, &ip6_accept_rtadv, 0, "Acts as a host not a router"); 463 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, 464 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, ""); 465 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, CTLFLAG_RW, 466 &ip6_hdrnestlimit, 0, "Upper limit of # of extension headers"); 467 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW, 468 &ip6_dad_count, 0, "Number of times to perform duplicate address detectione"); 469 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, CTLFLAG_RW, 470 &ip6_auto_flowlabel, 0, "Enable attaching flowlabel automatically"); 471 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, CTLFLAG_RW, 472 &ip6_defmcasthlim, 0, "Default multicast hop limit"); 473 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, gifhlim, CTLFLAG_RW, 474 &ip6_gif_hlim, 0, "Hop limit for gif encap packet"); 475 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, 476 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "Kame version"); 477 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, CTLFLAG_RW, 478 &ip6_use_deprecated, 0, "Allow deprecated addr as source"); 479 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, 480 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, 481 "Walk timer for router renumbering"); 482 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, CTLFLAG_RW, 483 &ip6_use_tempaddr, 0, "Whether to use temporary addresses"); 484 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 485 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0, 486 sysctl_ip6_temppltime, "I", 487 "Preferred lifetime for tmpaddrs"); 488 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 489 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0, 490 sysctl_ip6_tempvltime, "I", 491 "Valid lifetime for tmpaddrs"); 492 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, CTLFLAG_RW, 493 &ip6_auto_linklocal, 0, "Enable auto-assigning a link-local address"); 494 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD, 495 &rip6stat, rip6stat, "Raw stats"); 496 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW, 497 &ip6_maxfrags, 0, "Maximum fragments in reassembly queues"); 498 499 /* net.inet6.icmp6 */ 500 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, CTLFLAG_RW, 501 &icmp6_rediraccept, 0, "If enabled, accept and process redirects"); 502 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, CTLFLAG_RW, 503 &icmp6_redirtimeout, 0, "Cache time for redirect routes"); 504 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD, 505 &icmp6stat, icmp6stat, "Stats"); 506 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW, 507 &nd6_prune, 0, "Prune interval"); 508 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW, 509 &nd6_delay, 0, "Reachability timeout for stale neighbors"); 510 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, CTLFLAG_RW, 511 &nd6_umaxtries, 0, "Maximum unicast query"); 512 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, CTLFLAG_RW, 513 &nd6_mmaxtries, 0, "Maximum multicast query"); 514 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, CTLFLAG_RW, 515 &nd6_useloopback, 0, "Use loopback interface for local traffic"); 516 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, 517 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, "Enable/disable NI response"); 518 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, 519 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, 520 "ICMPv6 error maximum packet-per-second value (default: 100pps)"); 521 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, CTLFLAG_RW, 522 &nd6_maxnudhint, 0, "Max # of subsequent upper layer hints"); 523 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW, 524 &nd6_debug, 0, "Enable debug output"); 525 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, nd6_onlink_ns_rfc4861, CTLFLAG_RW, 526 &nd6_onlink_ns_rfc4861, 0, "Accept 'on-link' NS/NA in compliance with RFC 4861."); 527