1 /* $FreeBSD: src/sys/netinet6/in6_proto.c,v 1.6.2.9 2003/01/24 05:11:35 sam Exp $ */ 2 /* $DragonFly: src/sys/netinet6/in6_proto.c,v 1.14 2008/10/27 02:56:30 sephe Exp $ */ 3 /* $KAME: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 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. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 67 */ 68 69 #include "opt_inet.h" 70 #include "opt_inet6.h" 71 #include "opt_ipsec.h" 72 #include "opt_carp.h" 73 74 #include <sys/param.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/protosw.h> 78 #include <sys/kernel.h> 79 #include <sys/domain.h> 80 #include <sys/mbuf.h> 81 #include <sys/systm.h> 82 #include <sys/sysctl.h> 83 84 #include <net/if.h> 85 #include <net/radix.h> 86 #include <net/route.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/in_var.h> 91 #include <netinet/ip_encap.h> 92 #include <netinet/ip.h> 93 #include <netinet/ip_var.h> 94 #include <netinet/ip6.h> 95 #include <netinet6/ip6_var.h> 96 #include <netinet/icmp6.h> 97 98 #include <netinet/tcp.h> 99 #include <netinet/tcp_timer.h> 100 #include <netinet/tcp_var.h> 101 #include <netinet/udp.h> 102 #include <netinet/udp_var.h> 103 #include <netinet6/tcp6_var.h> 104 #include <netinet6/raw_ip6.h> 105 #include <netinet6/udp6_var.h> 106 #include <netinet6/pim6_var.h> 107 #include <netinet6/nd6.h> 108 #include <netinet6/in6_prefix.h> 109 110 #ifdef IPSEC 111 #include <netinet6/ipsec.h> 112 #ifdef INET6 113 #include <netinet6/ipsec6.h> 114 #endif 115 #include <netinet6/ah.h> 116 #ifdef INET6 117 #include <netinet6/ah6.h> 118 #endif 119 #ifdef IPSEC_ESP 120 #include <netinet6/esp.h> 121 #ifdef INET6 122 #include <netinet6/esp6.h> 123 #endif 124 #endif 125 #include <netinet6/ipcomp.h> 126 #ifdef INET6 127 #include <netinet6/ipcomp6.h> 128 #endif 129 #endif /* IPSEC */ 130 131 #ifdef FAST_IPSEC 132 #include <netproto/ipsec/ipsec6.h> 133 #define IPSEC 134 #define IPSEC_ESP 135 #define ah6_input ipsec6_common_input 136 #define esp6_input ipsec6_common_input 137 #define ipcomp6_input ipsec6_common_input 138 #endif /* FAST_IPSEC */ 139 140 #include <netinet6/ip6protosw.h> 141 142 #include <net/net_osdep.h> 143 144 #ifdef CARP 145 #include <netinet/ip_carp.h> 146 #endif 147 148 149 /* 150 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 151 */ 152 153 extern struct domain inet6domain; 154 static struct pr_usrreqs nousrreqs; 155 156 #define PR_LISTEN 0 157 #define PR_ABRTACPTDIS 0 158 159 struct ip6protosw inet6sw[] = { 160 { 0, &inet6domain, IPPROTO_IPV6, 0, 161 0, 0, 0, 0, 162 cpu0_soport, NULL, 163 ip6_init, 0, frag6_slowtimo, frag6_drain, 164 &nousrreqs, 165 }, 166 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 167 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 168 cpu0_soport, cpu0_ctlport, 169 0, 0, 0, 0, 170 &udp6_usrreqs, 171 }, 172 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN, 173 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 174 tcp6_soport, cpu0_ctlport, 175 #ifdef INET /* don't call initialization and timeout routines twice */ 176 0, 0, 0, tcp_drain, 177 #else 178 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 179 #endif 180 &tcp6_usrreqs, 181 }, 182 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 183 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 184 cpu0_soport, cpu0_ctlport, 185 0, 0, 0, 0, 186 &rip6_usrreqs 187 }, 188 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 189 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 190 cpu0_soport, cpu0_ctlport, 191 icmp6_init, icmp6_fasttimo, 0, 0, 192 &rip6_usrreqs 193 }, 194 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS, PR_ATOMIC|PR_ADDR, 195 dest6_input, 0, 0, 0, 196 cpu0_soport, NULL, 197 0, 0, 0, 0, 198 &nousrreqs 199 }, 200 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING, PR_ATOMIC|PR_ADDR, 201 route6_input, 0, 0, 0, 202 cpu0_soport, NULL, 203 0, 0, 0, 0, 204 &nousrreqs 205 }, 206 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT, PR_ATOMIC|PR_ADDR, 207 frag6_input, 0, 0, 0, 208 cpu0_soport, NULL, 209 0, 0, 0, 0, 210 &nousrreqs 211 }, 212 #ifdef IPSEC 213 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 214 ah6_input, 0, 0, 0, 215 cpu0_soport, NULL, 216 0, 0, 0, 0, 217 &nousrreqs, 218 }, 219 #ifdef IPSEC_ESP 220 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 221 esp6_input, 0, 222 esp6_ctlinput, 223 0, 224 cpu0_soport, NULL, 225 0, 0, 0, 0, 226 &nousrreqs, 227 }, 228 #endif 229 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 230 ipcomp6_input, 0, 0, 0, 231 cpu0_soport, NULL, 232 0, 0, 0, 0, 233 &nousrreqs, 234 }, 235 #endif /* IPSEC */ 236 #ifdef INET 237 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 238 encap6_input, rip6_output, 0, rip6_ctloutput, 239 cpu0_soport, NULL, 240 encap_init, 0, 0, 0, 241 &rip6_usrreqs 242 }, 243 #endif /* INET */ 244 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 245 encap6_input, rip6_output, 0, rip6_ctloutput, 246 cpu0_soport, NULL, 247 encap_init, 0, 0, 0, 248 &rip6_usrreqs 249 }, 250 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 251 pim6_input, rip6_output, 0, rip6_ctloutput, 252 cpu0_soport, NULL, 253 0, 0, 0, 0, 254 &rip6_usrreqs 255 }, 256 #ifdef CARP 257 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 258 carp6_input, rip6_output, 0, rip6_ctloutput, 259 cpu0_soport, NULL, 260 0, 0, 0, 0, 261 &rip6_usrreqs 262 }, 263 #endif /* CARP */ 264 265 /* raw wildcard */ 266 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 267 rip6_input, rip6_output, 0, rip6_ctloutput, 268 cpu0_soport, NULL, 269 0, 0, 0, 0, 270 &rip6_usrreqs 271 }, 272 }; 273 274 extern int in6_inithead (void **, int); 275 276 struct domain inet6domain = { 277 AF_INET6, "internet6", NULL, NULL, NULL, 278 (struct protosw *)inet6sw, 279 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 280 SLIST_ENTRY_INITIALIZER, 281 in6_inithead, offsetof(struct sockaddr_in6, sin6_addr) << 3, 282 sizeof(struct sockaddr_in6), in6_domifattach, in6_domifdetach 283 }; 284 285 DOMAIN_SET(inet6); 286 287 /* 288 * Internet configuration info 289 */ 290 #ifndef IPV6FORWARDING 291 #ifdef GATEWAY6 292 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 293 #else 294 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 295 #endif /* GATEWAY6 */ 296 #endif /* !IPV6FORWARDING */ 297 298 #ifndef IPV6_SENDREDIRECTS 299 #define IPV6_SENDREDIRECTS 1 300 #endif 301 302 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 303 int ip6_sendredirects = IPV6_SENDREDIRECTS; 304 int ip6_defhlim = IPV6_DEFHLIM; 305 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 306 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 307 int ip6_maxfragpackets; /* initialized in frag6.c:frag6_init() */ 308 int ip6_log_interval = 5; 309 int ip6_hdrnestlimit = 50; /* appropriate? */ 310 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 311 u_int32_t ip6_flow_seq; 312 int ip6_auto_flowlabel = 1; 313 int ip6_gif_hlim = 0; 314 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 315 int ip6_rr_prune = 5; /* router renumbering prefix 316 * walk list every 5 sec. */ 317 int ip6_v6only = 1; 318 319 u_int32_t ip6_id = 0UL; 320 int ip6_keepfaith = 0; 321 time_t ip6_log_time = (time_t)0L; 322 323 /* icmp6 */ 324 /* 325 * BSDI4 defines these variables in in_proto.c... 326 * XXX: what if we don't define INET? Should we define pmtu6_expire 327 * or so? (jinmei@kame.net 19990310) 328 */ 329 int pmtu_expire = 60*10; 330 int pmtu_probe = 60*2; 331 332 /* raw IP6 parameters */ 333 /* 334 * Nominal space allocated to a raw ip socket. 335 */ 336 #define RIPV6SNDQ 8192 337 #define RIPV6RCVQ 8192 338 339 u_long rip6_sendspace = RIPV6SNDQ; 340 u_long rip6_recvspace = RIPV6RCVQ; 341 342 /* ICMPV6 parameters */ 343 int icmp6_rediraccept = 1; /* accept and process redirects */ 344 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 345 int icmp6errppslim = 100; /* 100pps */ 346 int icmp6_nodeinfo = 3; /* enable/disable NI response */ 347 348 /* UDP on IP6 parameters */ 349 int udp6_sendspace = 9216; /* really max datagram size */ 350 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 351 /* 40 1K datagrams */ 352 353 /* 354 * sysctl related items. 355 */ 356 SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW, 0, 357 "Internet6 Family"); 358 359 /* net.inet6 */ 360 SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6"); 361 SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0, "ICMP6"); 362 SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0, "UDP6"); 363 SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0, "TCP6"); 364 #ifdef IPSEC 365 SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0, "IPSEC6"); 366 #endif /* IPSEC */ 367 368 /* net.inet6.ip6 */ 369 static int 370 sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) 371 { 372 int error = 0; 373 int old; 374 375 error = SYSCTL_OUT(req, arg1, sizeof(int)); 376 if (error || !req->newptr) 377 return (error); 378 old = ip6_temp_preferred_lifetime; 379 error = SYSCTL_IN(req, arg1, sizeof(int)); 380 if (ip6_temp_preferred_lifetime < 381 ip6_desync_factor + ip6_temp_regen_advance) { 382 ip6_temp_preferred_lifetime = old; 383 return (EINVAL); 384 } 385 return (error); 386 } 387 388 static int 389 sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) 390 { 391 int error = 0; 392 int old; 393 394 error = SYSCTL_OUT(req, arg1, sizeof(int)); 395 if (error || !req->newptr) 396 return (error); 397 old = ip6_temp_valid_lifetime; 398 error = SYSCTL_IN(req, arg1, sizeof(int)); 399 if (ip6_temp_valid_lifetime < ip6_temp_preferred_lifetime) { 400 ip6_temp_preferred_lifetime = old; 401 return (EINVAL); 402 } 403 return (error); 404 } 405 406 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, 407 forwarding, CTLFLAG_RW, &ip6_forwarding, 0, ""); 408 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, 409 redirect, CTLFLAG_RW, &ip6_sendredirects, 0, ""); 410 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, 411 hlim, CTLFLAG_RW, &ip6_defhlim, 0, ""); 412 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RD, 413 &ip6stat, ip6stat, ""); 414 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, 415 maxfragpackets, CTLFLAG_RW, &ip6_maxfragpackets, 0, ""); 416 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, 417 accept_rtadv, CTLFLAG_RW, &ip6_accept_rtadv, 0, ""); 418 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH, 419 keepfaith, CTLFLAG_RW, &ip6_keepfaith, 0, ""); 420 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, 421 log_interval, CTLFLAG_RW, &ip6_log_interval, 0, ""); 422 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, 423 hdrnestlimit, CTLFLAG_RW, &ip6_hdrnestlimit, 0, ""); 424 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, 425 dad_count, CTLFLAG_RW, &ip6_dad_count, 0, ""); 426 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, 427 auto_flowlabel, CTLFLAG_RW, &ip6_auto_flowlabel, 0, ""); 428 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, 429 defmcasthlim, CTLFLAG_RW, &ip6_defmcasthlim, 0, ""); 430 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_GIF_HLIM, 431 gifhlim, CTLFLAG_RW, &ip6_gif_hlim, 0, ""); 432 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, 433 kame_version, CTLFLAG_RD, __KAME_VERSION, 0, ""); 434 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, 435 use_deprecated, CTLFLAG_RW, &ip6_use_deprecated, 0, ""); 436 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, 437 rr_prune, CTLFLAG_RW, &ip6_rr_prune, 0, ""); 438 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, 439 use_tempaddr, CTLFLAG_RW, &ip6_use_tempaddr, 0, ""); 440 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, 441 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_preferred_lifetime, 0, 442 sysctl_ip6_temppltime, "I", ""); 443 SYSCTL_OID(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, 444 CTLTYPE_INT|CTLFLAG_RW, &ip6_temp_valid_lifetime, 0, 445 sysctl_ip6_tempvltime, "I", ""); 446 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, 447 v6only, CTLFLAG_RW, &ip6_v6only, 0, ""); 448 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, 449 auto_linklocal, CTLFLAG_RW, &ip6_auto_linklocal, 0, ""); 450 SYSCTL_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RD, 451 &rip6stat, rip6stat, ""); 452 453 /* net.inet6.icmp6 */ 454 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, 455 rediraccept, CTLFLAG_RW, &icmp6_rediraccept, 0, ""); 456 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, 457 redirtimeout, CTLFLAG_RW, &icmp6_redirtimeout, 0, ""); 458 SYSCTL_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RD, 459 &icmp6stat, icmp6stat, ""); 460 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, 461 nd6_prune, CTLFLAG_RW, &nd6_prune, 0, ""); 462 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, 463 nd6_delay, CTLFLAG_RW, &nd6_delay, 0, ""); 464 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, 465 nd6_umaxtries, CTLFLAG_RW, &nd6_umaxtries, 0, ""); 466 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, 467 nd6_mmaxtries, CTLFLAG_RW, &nd6_mmaxtries, 0, ""); 468 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, 469 nd6_useloopback, CTLFLAG_RW, &nd6_useloopback, 0, ""); 470 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, 471 nodeinfo, CTLFLAG_RW, &icmp6_nodeinfo, 0, ""); 472 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, 473 errppslimit, CTLFLAG_RW, &icmp6errppslim, 0, ""); 474 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, 475 nd6_maxnudhint, CTLFLAG_RW, &nd6_maxnudhint, 0, ""); 476 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, 477 nd6_debug, CTLFLAG_RW, &nd6_debug, 0, ""); 478