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 <netinet/in.h> 91 #include <netinet/ip6.h> 92 #include <netinet6/in6_var.h> 93 #include <netinet6/ip6_var.h> 94 #include <netinet/icmp6.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/raw_ip6.h> 97 98 /* netinet6/raw_ip6.c */ 99 extern struct protosw rip6_protosw; 100 /* netinet6/udp6_usrreq.c */ 101 extern struct protosw udp6_protosw, udplite6_protosw; 102 /* netinet/tcp_usrreq.c */ 103 extern struct protosw tcp6_protosw; 104 /* netinet/sctp6_usrreq.c */ 105 extern struct protosw sctp6_seqpacket_protosw, sctp6_stream_protosw; 106 107 /* 108 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 109 */ 110 FEATURE(inet6, "Internet Protocol version 6"); 111 112 struct domain inet6domain = { 113 .dom_family = AF_INET6, 114 .dom_name = "internet6", 115 .dom_rtattach = in6_inithead, 116 #ifdef VIMAGE 117 .dom_rtdetach = in6_detachhead, 118 #endif 119 .dom_ifattach = in6_domifattach, 120 .dom_ifdetach = in6_domifdetach, 121 .dom_ifmtu = in6_domifmtu, 122 .dom_nprotosw = 14, 123 .dom_protosw = { 124 &tcp6_protosw, 125 &udp6_protosw, 126 #ifdef SCTP 127 &sctp6_seqpacket_protosw, 128 &sctp6_stream_protosw, 129 #else 130 NULL, NULL, 131 #endif 132 &udplite6_protosw, 133 &rip6_protosw, 134 /* Spacer 8 times for loadable protocols. XXXGL: why 8? */ 135 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 136 }, 137 }; 138 139 DOMAIN_SET(inet6); 140 141 /* 142 * Internet configuration info 143 */ 144 #ifndef IPV6FORWARDING 145 #ifdef GATEWAY6 146 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 147 #else 148 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 149 #endif /* GATEWAY6 */ 150 #endif /* !IPV6FORWARDING */ 151 152 #ifndef IPV6_SENDREDIRECTS 153 #define IPV6_SENDREDIRECTS 1 154 #endif 155 156 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 157 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 158 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 159 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 160 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 161 VNET_DEFINE(int, ip6_no_radr) = 0; 162 VNET_DEFINE(int, ip6_norbit_raif) = 0; 163 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 164 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 165 * process? */ 166 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 167 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 168 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 169 * (RFC2462 5.5.4) */ 170 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 171 * walk list every 5 sec. */ 172 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 173 VNET_DEFINE(int, ip6_v6only) = 1; 174 175 #ifdef IPSTEALTH 176 VNET_DEFINE(int, ip6stealth) = 0; 177 #endif 178 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 179 * (RFC 4861) */ 180 VNET_DEFINE(bool, ip6_log_cannot_forward) = 1; 181 182 /* icmp6 */ 183 /* 184 * BSDI4 defines these variables in in_proto.c... 185 * XXX: what if we don't define INET? Should we define pmtu6_expire 186 * or so? (jinmei@kame.net 19990310) 187 */ 188 VNET_DEFINE(int, pmtu_expire) = 60*10; 189 VNET_DEFINE(int, pmtu_probe) = 60*2; 190 191 /* ICMPV6 parameters */ 192 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 193 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 194 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 195 /* control how to respond to NI queries */ 196 VNET_DEFINE(int, icmp6_nodeinfo) = 197 (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); 198 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 199 200 VNET_DEFINE_STATIC(int, ip6_log_interval) = 5; 201 VNET_DEFINE_STATIC(int, ip6_log_count) = 0; 202 VNET_DEFINE_STATIC(struct timeval, ip6_log_last) = { 0 }; 203 204 #define V_ip6_log_interval VNET(ip6_log_interval) 205 #define V_ip6_log_count VNET(ip6_log_count) 206 #define V_ip6_log_last VNET(ip6_log_last) 207 208 /* 209 * sysctl related items. 210 */ 211 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 212 "Internet6 Family"); 213 214 /* net.inet6 */ 215 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 216 "IP6"); 217 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 218 "ICMP6"); 219 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 220 "UDP6"); 221 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 222 "TCP6"); 223 #if defined(SCTP) || defined(SCTP_SUPPORT) 224 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 225 "SCTP6"); 226 #endif 227 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 228 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 229 "IPSEC6"); 230 #endif /* IPSEC */ 231 232 /* net.inet6.ip6 */ 233 static int 234 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 235 { 236 int error, val; 237 238 val = V_ip6_temp_preferred_lifetime; 239 error = sysctl_handle_int(oidp, &val, 0, req); 240 if (error != 0 || !req->newptr) 241 return (error); 242 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 243 return (EINVAL); 244 V_ip6_temp_preferred_lifetime = val; 245 return (0); 246 } 247 248 static int 249 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 250 { 251 int error, val; 252 253 val = V_ip6_temp_valid_lifetime; 254 error = sysctl_handle_int(oidp, &val, 0, req); 255 if (error != 0 || !req->newptr) 256 return (error); 257 if (val < V_ip6_temp_preferred_lifetime) 258 return (EINVAL); 259 V_ip6_temp_valid_lifetime = val; 260 return (0); 261 } 262 263 int 264 ip6_log_ratelimit(void) 265 { 266 267 return (ppsratecheck(&V_ip6_log_last, &V_ip6_log_count, 268 V_ip6_log_interval)); 269 } 270 271 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 272 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 273 "Enable forwarding of IPv6 packets between interfaces"); 274 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 275 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 276 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 277 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 278 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 279 "Default hop limit to use for outgoing IPv6 packets"); 280 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 281 ip6stat, 282 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 283 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 284 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 285 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 286 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 287 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 288 "Default value of per-interface flag to control whether routers " 289 "sending ICMPv6 RA messages on that interface are added into the " 290 "default router list"); 291 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 292 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 293 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 294 "on the interface"); 295 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 296 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 297 "Accept the default router list from ICMPv6 RA messages even " 298 "when packet forwarding is enabled"); 299 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 300 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 301 "Frequency in seconds at which to log IPv6 forwarding errors"); 302 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 303 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 304 "Default maximum number of IPv6 extension headers permitted on " 305 "incoming IPv6 packets, 0 for no artificial limit"); 306 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 307 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 308 "Number of ICMPv6 NS messages sent during duplicate address detection"); 309 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 310 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 311 "Provide an IPv6 flowlabel in outbound packets"); 312 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 313 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 314 "Default hop limit for IPv6 multicast packets originating from this " 315 "node"); 316 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 317 CTLFLAG_RD, __KAME_VERSION, 0, 318 "KAME version string"); 319 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 320 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 321 "Allow the use of addresses whose preferred lifetimes have expired"); 322 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 323 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 324 ""); /* XXX unused */ 325 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 326 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 327 "Create RFC3041 temporary addresses for autoconfigured addresses"); 328 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 329 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 330 NULL, 0, sysctl_ip6_temppltime, "I", 331 "Maximum preferred lifetime for temporary addresses"); 332 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 333 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 334 NULL, 0, sysctl_ip6_tempvltime, "I", 335 "Maximum valid lifetime for temporary addresses"); 336 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 337 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 338 "Restrict AF_INET6 sockets to IPv6 addresses only"); 339 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 340 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 341 "Default value of per-interface flag for automatically adding an IPv6 " 342 "link-local address to interfaces when attached"); 343 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 344 struct rip6stat, rip6stat, 345 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 346 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 347 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 348 "Prefer RFC3041 temporary addresses in source address selection"); 349 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 350 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 351 "Use the default scope zone when none is specified"); 352 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 353 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 354 "Enable path MTU discovery for multicast packets"); 355 #ifdef IPSTEALTH 356 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 357 &VNET_NAME(ip6stealth), 0, 358 "Forward IPv6 packets without decrementing their TTL"); 359 #endif 360 SYSCTL_BOOL(_net_inet6_ip6, OID_AUTO, 361 log_cannot_forward, CTLFLAG_VNET | CTLFLAG_RW, 362 &VNET_NAME(ip6_log_cannot_forward), 1, 363 "Log packets that cannot be forwarded"); 364 365 /* net.inet6.icmp6 */ 366 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 367 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 368 "Accept ICMPv6 redirect messages"); 369 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 370 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 371 "Delay in seconds before expiring redirect route"); 372 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 373 struct icmp6stat, icmp6stat, 374 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 375 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 376 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 377 "Frequency in seconds of checks for expired prefixes and routers"); 378 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 379 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 380 "Delay in seconds before probing for reachability"); 381 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 382 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 383 "Number of ICMPv6 NS messages sent during reachability detection"); 384 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 385 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 386 "Number of ICMPv6 NS messages sent during address resolution"); 387 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 388 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 389 "Create a loopback route when configuring an IPv6 address"); 390 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 391 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 392 "Mask of enabled RFC4620 node information query types"); 393 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 394 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 395 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 396 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 397 "for compatibility with KAME implementation"); 398 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 399 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 400 "Maximum number of ICMPv6 error messages per second"); 401 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 402 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 403 ""); /* XXX unused */ 404 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 405 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 406 "Log NDP debug messages"); 407 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 408 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 409 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 410 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 411 #ifdef EXPERIMENTAL 412 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 413 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 414 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 415 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 416 "draft-ietf-6man-ipv6only-flag"); 417 #endif 418