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 /* netinet6/raw_ip6.c */ 125 extern struct protosw rip6_protosw; 126 /* netinet6/udp6_usrreq.c */ 127 extern struct protosw udp6_protosw, udplite6_protosw; 128 129 /* 130 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 131 */ 132 FEATURE(inet6, "Internet Protocol version 6"); 133 134 struct domain inet6domain = { 135 .dom_family = AF_INET6, 136 .dom_name = "internet6", 137 .dom_rtattach = in6_inithead, 138 #ifdef VIMAGE 139 .dom_rtdetach = in6_detachhead, 140 #endif 141 .dom_ifattach = in6_domifattach, 142 .dom_ifdetach = in6_domifdetach, 143 .dom_ifmtu = in6_domifmtu, 144 .dom_nprotosw = 14, 145 .dom_protosw = { 146 &tcp6_protosw, 147 &udp6_protosw, 148 #ifdef SCTP 149 &sctp6_seqpacket_protosw, 150 &sctp6_stream_protosw, 151 #else 152 NULL, NULL, 153 #endif 154 &udplite6_protosw, 155 &rip6_protosw, 156 /* Spacer 8 times for loadable protocols. XXXGL: why 8? */ 157 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 158 }, 159 }; 160 161 DOMAIN_SET(inet6); 162 163 /* 164 * Internet configuration info 165 */ 166 #ifndef IPV6FORWARDING 167 #ifdef GATEWAY6 168 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 169 #else 170 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 171 #endif /* GATEWAY6 */ 172 #endif /* !IPV6FORWARDING */ 173 174 #ifndef IPV6_SENDREDIRECTS 175 #define IPV6_SENDREDIRECTS 1 176 #endif 177 178 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 179 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 180 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 181 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 182 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 183 VNET_DEFINE(int, ip6_no_radr) = 0; 184 VNET_DEFINE(int, ip6_norbit_raif) = 0; 185 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 186 VNET_DEFINE(int, ip6_log_interval) = 5; 187 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 188 * process? */ 189 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 190 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 191 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 192 * (RFC2462 5.5.4) */ 193 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 194 * walk list every 5 sec. */ 195 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 196 VNET_DEFINE(int, ip6_v6only) = 1; 197 198 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; 199 #ifdef IPSTEALTH 200 VNET_DEFINE(int, ip6stealth) = 0; 201 #endif 202 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 203 * (RFC 4861) */ 204 205 /* icmp6 */ 206 /* 207 * BSDI4 defines these variables in in_proto.c... 208 * XXX: what if we don't define INET? Should we define pmtu6_expire 209 * or so? (jinmei@kame.net 19990310) 210 */ 211 VNET_DEFINE(int, pmtu_expire) = 60*10; 212 VNET_DEFINE(int, pmtu_probe) = 60*2; 213 214 /* ICMPV6 parameters */ 215 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 216 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 217 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 218 /* control how to respond to NI queries */ 219 VNET_DEFINE(int, icmp6_nodeinfo) = 220 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 221 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 222 223 /* 224 * sysctl related items. 225 */ 226 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 227 "Internet6 Family"); 228 229 /* net.inet6 */ 230 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 231 "IP6"); 232 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 233 "ICMP6"); 234 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 235 "UDP6"); 236 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 237 "TCP6"); 238 #if defined(SCTP) || defined(SCTP_SUPPORT) 239 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 240 "SCTP6"); 241 #endif 242 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 243 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 244 "IPSEC6"); 245 #endif /* IPSEC */ 246 247 /* net.inet6.ip6 */ 248 static int 249 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 250 { 251 int error, val; 252 253 val = V_ip6_temp_preferred_lifetime; 254 error = sysctl_handle_int(oidp, &val, 0, req); 255 if (error != 0 || !req->newptr) 256 return (error); 257 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 258 return (EINVAL); 259 V_ip6_temp_preferred_lifetime = val; 260 return (0); 261 } 262 263 static int 264 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 265 { 266 int error, val; 267 268 val = V_ip6_temp_valid_lifetime; 269 error = sysctl_handle_int(oidp, &val, 0, req); 270 if (error != 0 || !req->newptr) 271 return (error); 272 if (val < V_ip6_temp_preferred_lifetime) 273 return (EINVAL); 274 V_ip6_temp_valid_lifetime = val; 275 return (0); 276 } 277 278 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 279 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 280 "Enable forwarding of IPv6 packets between interfaces"); 281 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 282 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 283 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 284 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 285 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 286 "Default hop limit to use for outgoing IPv6 packets"); 287 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 288 ip6stat, 289 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 290 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 291 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 292 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 293 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 294 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 295 "Default value of per-interface flag to control whether routers " 296 "sending ICMPv6 RA messages on that interface are added into the " 297 "default router list"); 298 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 299 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 300 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 301 "on the interface"); 302 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 303 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 304 "Accept the default router list from ICMPv6 RA messages even " 305 "when packet forwarding is enabled"); 306 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 307 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 308 "Frequency in seconds at which to log IPv6 forwarding errors"); 309 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 310 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 311 "Default maximum number of IPv6 extension headers permitted on " 312 "incoming IPv6 packets, 0 for no artificial limit"); 313 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 314 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 315 "Number of ICMPv6 NS messages sent during duplicate address detection"); 316 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 317 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 318 "Provide an IPv6 flowlabel in outbound packets"); 319 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 320 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 321 "Default hop limit for IPv6 multicast packets originating from this " 322 "node"); 323 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 324 CTLFLAG_RD, __KAME_VERSION, 0, 325 "KAME version string"); 326 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 327 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 328 "Allow the use of addresses whose preferred lifetimes have expired"); 329 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 330 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 331 ""); /* XXX unused */ 332 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 333 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 334 "Create RFC3041 temporary addresses for autoconfigured addresses"); 335 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 336 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 337 NULL, 0, sysctl_ip6_temppltime, "I", 338 "Maximum preferred lifetime for temporary addresses"); 339 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 340 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 341 NULL, 0, sysctl_ip6_tempvltime, "I", 342 "Maximum valid lifetime for temporary addresses"); 343 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 344 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 345 "Restrict AF_INET6 sockets to IPv6 addresses only"); 346 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 347 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 348 "Default value of per-interface flag for automatically adding an IPv6 " 349 "link-local address to interfaces when attached"); 350 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 351 struct rip6stat, rip6stat, 352 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 353 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 354 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 355 "Prefer RFC3041 temporary addresses in source address selection"); 356 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 357 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 358 "Use the default scope zone when none is specified"); 359 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 360 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 361 "Enable path MTU discovery for multicast packets"); 362 #ifdef IPSTEALTH 363 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 364 &VNET_NAME(ip6stealth), 0, 365 "Forward IPv6 packets without decrementing their TTL"); 366 #endif 367 368 /* net.inet6.icmp6 */ 369 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 370 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 371 "Accept ICMPv6 redirect messages"); 372 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 373 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 374 "Delay in seconds before expiring redirect route"); 375 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 376 struct icmp6stat, icmp6stat, 377 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 378 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 379 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 380 "Frequency in seconds of checks for expired prefixes and routers"); 381 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 382 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 383 "Delay in seconds before probing for reachability"); 384 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 385 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 386 "Number of ICMPv6 NS messages sent during reachability detection"); 387 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 388 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 389 "Number of ICMPv6 NS messages sent during address resolution"); 390 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 391 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 392 "Create a loopback route when configuring an IPv6 address"); 393 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 394 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 395 "Mask of enabled RFC4620 node information query types"); 396 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 397 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 398 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 399 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 400 "for compatibility with KAME implementation"); 401 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 402 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 403 "Maximum number of ICMPv6 error messages per second"); 404 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 405 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 406 ""); /* XXX unused */ 407 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 408 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 409 "Log NDP debug messages"); 410 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 411 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 412 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 413 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 414 #ifdef EXPERIMENTAL 415 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 416 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 417 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 418 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 419 "draft-ietf-6man-ipv6only-flag"); 420 #endif 421