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 #include "opt_inet.h" 67 #include "opt_inet6.h" 68 #include "opt_ipsec.h" 69 #include "opt_ipstealth.h" 70 #include "opt_sctp.h" 71 #include "opt_route.h" 72 73 #include <sys/param.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/proc.h> 77 #include <sys/protosw.h> 78 #include <sys/jail.h> 79 #include <sys/kernel.h> 80 #include <sys/malloc.h> 81 #include <sys/domain.h> 82 #include <sys/mbuf.h> 83 #include <sys/systm.h> 84 #include <sys/sysctl.h> 85 86 #include <net/if.h> 87 #include <net/if_var.h> 88 #include <netinet/in.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/in6_var.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/nd6.h> 94 #include <netinet6/raw_ip6.h> 95 96 /* netinet6/raw_ip6.c */ 97 extern struct protosw rip6_protosw; 98 /* netinet6/udp6_usrreq.c */ 99 extern struct protosw udp6_protosw, udplite6_protosw; 100 /* netinet/tcp_usrreq.c */ 101 extern struct protosw tcp6_protosw; 102 /* netinet/sctp6_usrreq.c */ 103 extern struct protosw sctp6_seqpacket_protosw, sctp6_stream_protosw; 104 105 /* 106 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 107 */ 108 FEATURE(inet6, "Internet Protocol version 6"); 109 110 struct domain inet6domain = { 111 .dom_family = AF_INET6, 112 .dom_name = "internet6", 113 .dom_rtattach = in6_inithead, 114 #ifdef VIMAGE 115 .dom_rtdetach = in6_detachhead, 116 #endif 117 .dom_ifattach = in6_domifattach, 118 .dom_ifdetach = in6_domifdetach, 119 .dom_ifmtu = in6_domifmtu, 120 .dom_nprotosw = 14, 121 .dom_protosw = { 122 &tcp6_protosw, 123 &udp6_protosw, 124 #ifdef SCTP 125 &sctp6_seqpacket_protosw, 126 &sctp6_stream_protosw, 127 #else 128 NULL, NULL, 129 #endif 130 &udplite6_protosw, 131 &rip6_protosw, 132 /* Spacer 8 times for loadable protocols. XXXGL: why 8? */ 133 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 134 }, 135 }; 136 137 DOMAIN_SET(inet6); 138 139 /* 140 * Internet configuration info 141 */ 142 #ifndef IPV6FORWARDING 143 #ifdef GATEWAY6 144 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 145 #else 146 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 147 #endif /* GATEWAY6 */ 148 #endif /* !IPV6FORWARDING */ 149 150 #ifndef IPV6_SENDREDIRECTS 151 #define IPV6_SENDREDIRECTS 1 152 #endif 153 154 VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ 155 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; 156 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; 157 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; 158 VNET_DEFINE(int, ip6_accept_rtadv) = 0; 159 VNET_DEFINE(int, ip6_no_radr) = 0; 160 VNET_DEFINE(int, ip6_norbit_raif) = 0; 161 VNET_DEFINE(int, ip6_rfc6204w3) = 0; 162 VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we 163 * process? */ 164 VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ 165 VNET_DEFINE(int, ip6_auto_flowlabel) = 1; 166 VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr 167 * (RFC2462 5.5.4) */ 168 VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix 169 * walk list every 5 sec. */ 170 VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ 171 VNET_DEFINE(int, ip6_v6only) = 1; 172 173 #ifdef IPSTEALTH 174 VNET_DEFINE(int, ip6stealth) = 0; 175 #endif 176 VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS 177 * (RFC 4861) */ 178 VNET_DEFINE(bool, ip6_log_cannot_forward) = 1; 179 180 /* icmp6 */ 181 /* 182 * BSDI4 defines these variables in in_proto.c... 183 * XXX: what if we don't define INET? Should we define pmtu6_expire 184 * or so? (jinmei@kame.net 19990310) 185 */ 186 VNET_DEFINE(int, pmtu_expire) = 60*10; 187 VNET_DEFINE(int, pmtu_probe) = 60*2; 188 189 /* ICMPV6 parameters */ 190 VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ 191 VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ 192 VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ 193 /* control how to respond to NI queries */ 194 VNET_DEFINE(int, icmp6_nodeinfo) = 0; 195 VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; 196 197 VNET_DEFINE_STATIC(int, ip6_log_interval) = 5; 198 VNET_DEFINE_STATIC(int, ip6_log_count) = 0; 199 VNET_DEFINE_STATIC(struct timeval, ip6_log_last) = { 0 }; 200 201 #define V_ip6_log_interval VNET(ip6_log_interval) 202 #define V_ip6_log_count VNET(ip6_log_count) 203 #define V_ip6_log_last VNET(ip6_log_last) 204 205 /* 206 * sysctl related items. 207 */ 208 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 209 "Internet6 Family"); 210 211 /* net.inet6 */ 212 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 213 "IP6"); 214 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 215 "ICMP6"); 216 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 217 "UDP6"); 218 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 219 "TCP6"); 220 #if defined(SCTP) || defined(SCTP_SUPPORT) 221 SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 222 "SCTP6"); 223 #endif 224 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 225 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 226 "IPSEC6"); 227 #endif /* IPSEC */ 228 229 /* net.inet6.ip6 */ 230 static int 231 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 232 { 233 int error, val; 234 235 val = V_ip6_temp_preferred_lifetime; 236 error = sysctl_handle_int(oidp, &val, 0, req); 237 if (error != 0 || !req->newptr) 238 return (error); 239 if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) 240 return (EINVAL); 241 V_ip6_temp_preferred_lifetime = val; 242 return (0); 243 } 244 245 static int 246 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 247 { 248 int error, val; 249 250 val = V_ip6_temp_valid_lifetime; 251 error = sysctl_handle_int(oidp, &val, 0, req); 252 if (error != 0 || !req->newptr) 253 return (error); 254 if (val < V_ip6_temp_preferred_lifetime) 255 return (EINVAL); 256 V_ip6_temp_valid_lifetime = val; 257 return (0); 258 } 259 260 int 261 ip6_log_ratelimit(void) 262 { 263 264 return (ppsratecheck(&V_ip6_log_last, &V_ip6_log_count, 265 V_ip6_log_interval)); 266 } 267 268 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, 269 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, 270 "Enable forwarding of IPv6 packets between interfaces"); 271 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, 272 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, 273 "Send ICMPv6 redirects for unforwardable IPv6 packets"); 274 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, 275 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, 276 "Default hop limit to use for outgoing IPv6 packets"); 277 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, 278 ip6stat, 279 "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); 280 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, 281 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, 282 "Default value of per-interface flag for accepting ICMPv6 RA messages"); 283 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, 284 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, 285 "Default value of per-interface flag to control whether routers " 286 "sending ICMPv6 RA messages on that interface are added into the " 287 "default router list"); 288 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, 289 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, 290 "Always set clear the R flag in ICMPv6 NA messages when accepting RA " 291 "on the interface"); 292 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, 293 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, 294 "Accept the default router list from ICMPv6 RA messages even " 295 "when packet forwarding is enabled"); 296 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, 297 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, 298 "Frequency in seconds at which to log IPv6 forwarding errors"); 299 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, 300 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, 301 "Default maximum number of IPv6 extension headers permitted on " 302 "incoming IPv6 packets, 0 for no artificial limit"); 303 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, 304 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, 305 "Number of ICMPv6 NS messages sent during duplicate address detection"); 306 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, 307 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, 308 "Provide an IPv6 flowlabel in outbound packets"); 309 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, 310 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, 311 "Default hop limit for IPv6 multicast packets originating from this " 312 "node"); 313 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, 314 CTLFLAG_RD, __KAME_VERSION, 0, 315 "KAME version string"); 316 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, 317 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, 318 "Allow the use of addresses whose preferred lifetimes have expired"); 319 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, 320 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, 321 ""); /* XXX unused */ 322 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, 323 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, 324 "Create RFC3041 temporary addresses for autoconfigured addresses"); 325 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 326 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 327 NULL, 0, sysctl_ip6_temppltime, "I", 328 "Maximum preferred lifetime for temporary addresses"); 329 SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 330 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 331 NULL, 0, sysctl_ip6_tempvltime, "I", 332 "Maximum valid lifetime for temporary addresses"); 333 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, 334 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, 335 "Restrict AF_INET6 sockets to IPv6 addresses only"); 336 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, 337 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, 338 "Default value of per-interface flag for automatically adding an IPv6 " 339 "link-local address to interfaces when attached"); 340 SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, 341 struct rip6stat, rip6stat, 342 "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); 343 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, 344 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, 345 "Prefer RFC3041 temporary addresses in source address selection"); 346 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, 347 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, 348 "Use the default scope zone when none is specified"); 349 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, 350 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, 351 "Enable path MTU discovery for multicast packets"); 352 #ifdef IPSTEALTH 353 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, 354 &VNET_NAME(ip6stealth), 0, 355 "Forward IPv6 packets without decrementing their TTL"); 356 #endif 357 SYSCTL_BOOL(_net_inet6_ip6, OID_AUTO, 358 log_cannot_forward, CTLFLAG_VNET | CTLFLAG_RW, 359 &VNET_NAME(ip6_log_cannot_forward), 1, 360 "Log packets that cannot be forwarded"); 361 362 /* net.inet6.icmp6 */ 363 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, 364 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, 365 "Accept ICMPv6 redirect messages"); 366 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, 367 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, 368 "Delay in seconds before expiring redirect route"); 369 SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, 370 struct icmp6stat, icmp6stat, 371 "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); 372 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, 373 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, 374 "Frequency in seconds of checks for expired prefixes and routers"); 375 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, 376 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, 377 "Delay in seconds before probing for reachability"); 378 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, 379 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, 380 "Number of ICMPv6 NS messages sent during reachability detection"); 381 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, 382 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, 383 "Number of ICMPv6 NS messages sent during address resolution"); 384 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, 385 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, 386 "Create a loopback route when configuring an IPv6 address"); 387 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, 388 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, 389 "Mask of enabled RFC4620 node information query types"); 390 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, 391 nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, 392 &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, 393 "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " 394 "for compatibility with KAME implementation"); 395 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, 396 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, 397 "Maximum number of ICMPv6 error messages per second"); 398 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, 399 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, 400 ""); /* XXX unused */ 401 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, 402 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, 403 "Log NDP debug messages"); 404 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, 405 nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, 406 &VNET_NAME(nd6_onlink_ns_rfc4861), 0, 407 "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); 408 #ifdef EXPERIMENTAL 409 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, 410 nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, 411 &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, 412 "Ignore the 'IPv6-Only flag' in RA messages in compliance with " 413 "draft-ietf-6man-ipv6only-flag"); 414 #endif 415