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: ip6_var.h,v 1.62 2001/05/03 14:51:48 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 63 #ifndef _NETINET6_IP6_VAR_H_ 64 #define _NETINET6_IP6_VAR_H_ 65 66 #include <sys/epoch.h> 67 68 #ifdef _KERNEL 69 struct ip6asfrag; /* frag6.c */ 70 TAILQ_HEAD(ip6fraghead, ip6asfrag); 71 72 /* 73 * IP6 reassembly queue structure. Each fragment 74 * being reassembled is attached to one of these structures. 75 */ 76 struct ip6q { 77 struct ip6fraghead ip6q_frags; 78 u_int32_t ip6q_ident; 79 u_int8_t ip6q_nxt; 80 u_int8_t ip6q_ecn; 81 u_int16_t ip6q_ttl; 82 struct in6_addr ip6q_src, ip6q_dst; 83 TAILQ_ENTRY(ip6q) ip6q_tq; 84 int ip6q_unfrglen; /* len of unfragmentable part */ 85 int ip6q_nfrag; /* # of fragments */ 86 struct label *ip6q_label; 87 }; 88 #endif /* _KERNEL */ 89 90 /* 91 * IP6 reinjecting structure. 92 */ 93 struct ip6_direct_ctx { 94 uint32_t ip6dc_nxt; /* next header to process */ 95 uint32_t ip6dc_off; /* offset to next header */ 96 }; 97 98 #if defined(_NETINET6_IN6_VAR_H_) && defined(_KERNEL) 99 /* 100 * Structure attached to inpcb.in6p_moptions and 101 * passed to ip6_output when IPv6 multicast options are in use. 102 * This structure is lazy-allocated. 103 */ 104 struct ip6_moptions { 105 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 106 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 107 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 108 struct ip6_mfilter_head im6o_head; /* group membership list */ 109 }; 110 #else 111 struct ip6_moptions; 112 #endif 113 /* 114 * Control options for outgoing packets 115 */ 116 117 /* Routing header related info */ 118 struct ip6po_rhinfo { 119 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 120 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 121 }; 122 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 123 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 124 125 /* Nexthop related info */ 126 struct ip6po_nhinfo { 127 struct sockaddr *ip6po_nhi_nexthop; 128 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 129 }; 130 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 131 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 132 133 struct ip6_pktopts { 134 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 135 int ip6po_hlim; /* Hoplimit for outgoing packets */ 136 137 /* Outgoing IF/address information */ 138 struct in6_pktinfo *ip6po_pktinfo; 139 140 /* Next-hop address information */ 141 struct ip6po_nhinfo ip6po_nhinfo; 142 143 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 144 145 /* Destination options header (before a routing header) */ 146 struct ip6_dest *ip6po_dest1; 147 148 /* Routing header related info. */ 149 struct ip6po_rhinfo ip6po_rhinfo; 150 151 /* Destination options header (after a routing header) */ 152 struct ip6_dest *ip6po_dest2; 153 154 int ip6po_tclass; /* traffic class */ 155 156 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 157 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 158 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 159 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 160 161 int ip6po_prefer_tempaddr; /* whether temporary addresses are 162 preferred as source address */ 163 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 164 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 165 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 166 167 int ip6po_flags; 168 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 169 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 170 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 171 #endif 172 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 173 #define IP6PO_USECOA 0x08 /* use care of address */ 174 }; 175 176 /* 177 * Control options for incoming packets 178 */ 179 180 struct ip6stat { 181 uint64_t ip6s_total; /* total packets received */ 182 uint64_t ip6s_tooshort; /* packet too short */ 183 uint64_t ip6s_toosmall; /* not enough data */ 184 uint64_t ip6s_fragments; /* fragments received */ 185 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 186 uint64_t ip6s_fragtimeout; /* fragments timed out */ 187 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 188 uint64_t ip6s_forward; /* packets forwarded */ 189 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 190 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 191 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 192 uint64_t ip6s_localout; /* total ip packets generated here */ 193 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 194 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 195 uint64_t ip6s_atomicfrags; /* atomic fragments */ 196 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 197 uint64_t ip6s_ofragments; /* output fragments created */ 198 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 199 uint64_t ip6s_badoptions; /* error in option processing */ 200 uint64_t ip6s_noroute; /* packets discarded due to no route */ 201 uint64_t ip6s_badvers; /* ip6 version != 6 */ 202 uint64_t ip6s_rawout; /* total raw ip packets generated */ 203 uint64_t ip6s_badscope; /* scope error */ 204 uint64_t ip6s_notmember; /* don't join this multicast group */ 205 #define IP6S_HDRCNT 256 /* headers count */ 206 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 207 uint64_t ip6s_m1; /* one mbuf */ 208 #define IP6S_M2MMAX 32 209 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 210 uint64_t ip6s_mext1; /* one ext mbuf */ 211 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 212 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 213 uint64_t ip6s_nogif; /* no match gif found */ 214 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 215 216 /* 217 * statistics for improvement of the source address selection 218 * algorithm: 219 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 220 */ 221 #define IP6S_RULESMAX 16 222 #define IP6S_SCOPECNT 16 223 /* number of times that address selection fails */ 224 uint64_t ip6s_sources_none; 225 /* number of times that an address on the outgoing I/F is chosen */ 226 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 227 /* number of times that an address on a non-outgoing I/F is chosen */ 228 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 229 /* 230 * number of times that an address that has the same scope 231 * from the destination is chosen. 232 */ 233 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 234 /* 235 * number of times that an address that has a different scope 236 * from the destination is chosen. 237 */ 238 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 239 /* number of times that a deprecated address is chosen */ 240 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 241 242 /* number of times that each rule of source selection is applied. */ 243 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 244 }; 245 246 #ifdef _KERNEL 247 #include <sys/counter.h> 248 249 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 250 #define IP6STAT_ADD(name, val) \ 251 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) 252 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 253 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 254 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 255 #endif 256 257 #ifdef _KERNEL 258 /* flags passed to ip6_output as last parameter */ 259 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 260 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 261 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 262 263 #ifdef __NO_STRICT_ALIGNMENT 264 #define IP6_HDR_ALIGNED_P(ip) 1 265 #else 266 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 267 #endif 268 269 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 270 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 271 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 272 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 273 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 274 * walk list every 5 sec. */ 275 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 276 VNET_DECLARE(int, ip6_v6only); 277 #define V_ip6_defhlim VNET(ip6_defhlim) 278 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 279 #define V_ip6_forwarding VNET(ip6_forwarding) 280 #define V_ip6_use_deprecated VNET(ip6_use_deprecated) 281 #define V_ip6_rr_prune VNET(ip6_rr_prune) 282 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 283 #define V_ip6_v6only VNET(ip6_v6only) 284 285 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 286 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 287 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 288 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 289 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 290 * receiving IF. */ 291 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 292 forwarding enabled */ 293 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 294 * headers */ 295 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 296 #define V_ip6_mrouter VNET(ip6_mrouter) 297 #define V_ip6_sendredirects VNET(ip6_sendredirects) 298 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 299 #define V_ip6_no_radr VNET(ip6_no_radr) 300 #define V_ip6_norbit_raif VNET(ip6_norbit_raif) 301 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 302 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 303 #define V_ip6_dad_count VNET(ip6_dad_count) 304 305 VNET_DECLARE(int, ip6_auto_flowlabel); 306 VNET_DECLARE(int, ip6_auto_linklocal); 307 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 308 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 309 310 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 311 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 312 * addresses in the source address 313 * selection */ 314 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 315 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 316 317 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 318 * zone when unspecified */ 319 #define V_ip6_use_defzone VNET(ip6_use_defzone) 320 321 VNET_DECLARE(struct pfil_head *, inet6_pfil_head); 322 #define V_inet6_pfil_head VNET(inet6_pfil_head) 323 #define PFIL_INET6_NAME "inet6" 324 325 VNET_DECLARE(struct pfil_head *, inet6_local_pfil_head); 326 #define V_inet6_local_pfil_head VNET(inet6_local_pfil_head) 327 #define PFIL_INET6_LOCAL_NAME "inet6-local" 328 329 #ifdef IPSTEALTH 330 VNET_DECLARE(int, ip6stealth); 331 #define V_ip6stealth VNET(ip6stealth) 332 #endif 333 334 #ifdef EXPERIMENTAL 335 VNET_DECLARE(int, nd6_ignore_ipv6_only_ra); 336 #define V_nd6_ignore_ipv6_only_ra VNET(nd6_ignore_ipv6_only_ra) 337 #endif 338 339 VNET_DECLARE(bool, ip6_log_cannot_forward); 340 #define V_ip6_log_cannot_forward VNET(ip6_log_cannot_forward) 341 342 extern struct pr_usrreqs rip6_usrreqs; 343 struct sockopt; 344 345 struct inpcb; 346 struct ucred; 347 348 int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 349 350 void ip6_input(struct mbuf *); 351 void ip6_direct_input(struct mbuf *); 352 void ip6_freepcbopts(struct ip6_pktopts *); 353 354 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 355 int ip6_get_prevhdr(const struct mbuf *, int); 356 int ip6_nexthdr(const struct mbuf *, int, int, int *); 357 int ip6_lasthdr(const struct mbuf *, int, int, int *); 358 359 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 360 struct mbuf *); 361 362 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 363 u_int32_t *); 364 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 365 struct mbuf **, int *); 366 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 367 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 368 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 369 370 void ip6_forward(struct mbuf *, int); 371 372 void ip6_mloopback(struct ifnet *, struct mbuf *); 373 int ip6_output(struct mbuf *, struct ip6_pktopts *, 374 struct route_in6 *, 375 int, 376 struct ip6_moptions *, struct ifnet **, 377 struct inpcb *); 378 int ip6_ctloutput(struct socket *, struct sockopt *); 379 int ip6_raw_ctloutput(struct socket *, struct sockopt *); 380 void ip6_initpktopts(struct ip6_pktopts *); 381 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 382 struct ip6_pktopts *, struct ucred *, int); 383 void ip6_clearpktopts(struct ip6_pktopts *, int); 384 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 385 int ip6_optlen(struct inpcb *); 386 int ip6_deletefraghdr(struct mbuf *, int, int); 387 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 388 uint32_t); 389 390 int route6_input(struct mbuf **, int *, int); 391 392 void frag6_init(void); 393 void frag6_destroy(void); 394 int frag6_input(struct mbuf **, int *, int); 395 void frag6_drain(void); 396 397 void rip6_init(void); 398 int rip6_ctloutput(struct socket *, struct sockopt *); 399 int rip6_usrreq(struct socket *, 400 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 401 402 int dest6_input(struct mbuf **, int *, int); 403 int none_input(struct mbuf **, int *, int); 404 405 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 406 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 407 int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 408 uint32_t, struct ifnet *, struct in6_addr *, int *); 409 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 410 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 411 struct nhop_object **, u_int, uint32_t); 412 u_int32_t ip6_randomid(void); 413 u_int32_t ip6_randomflowlabel(void); 414 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 415 416 int ip6_log_ratelimit(void); 417 418 /* 419 * Argument type for the last arg of ip6proto_ctlinput_t(). 420 * 421 * IPv6 ICMP IPv6 [exthdrs] finalhdr payload 422 * ^ ^ ^ ^ 423 * | | ip6c_ip6 ip6c_off 424 * | ip6c_icmp6 425 * ip6c_m 426 * 427 * ip6c_finaldst's sin6_addr usually points to ip6c_ip6->ip6_dst. If the 428 * original * (internal) packet carries a routing header, it may point the 429 * final * destination address in the routing header. 430 * 431 * ip6c_src: ip6c_ip6->ip6_src + scope info + flowlabel in ip6c_ip6 432 * (beware of flowlabel, if you try to compare it against others) 433 * ip6c_dst: ip6c_finaldst + scope info 434 */ 435 struct ip6ctlparam { 436 struct mbuf *ip6c_m; /* start of mbuf chain */ 437 struct icmp6_hdr *ip6c_icmp6; /* icmp6 header of target packet */ 438 struct ip6_hdr *ip6c_ip6; /* ip6 header of target packet */ 439 int ip6c_off; /* offset of the target proto header */ 440 struct sockaddr_in6 *ip6c_src; /* srcaddr w/ additional info */ 441 struct sockaddr_in6 *ip6c_dst; /* (final) dstaddr w/ additional info */ 442 struct sockaddr_in6 *ip6c_finaldst; /* final destination address */ 443 void *ip6c_cmdarg; /* control command dependent data */ 444 u_int8_t ip6c_nxt; /* final next header field */ 445 }; 446 447 typedef int ip6proto_input_t(struct mbuf **, int *, int); 448 typedef void ip6proto_ctlinput_t(struct ip6ctlparam *); 449 int ip6proto_register(uint8_t, ip6proto_input_t, ip6proto_ctlinput_t); 450 int ip6proto_unregister(uint8_t); 451 #define IP6PROTO_REGISTER(prot, input, ctl) do { \ 452 int error __diagused; \ 453 error = ip6proto_register(prot, input, ctl); \ 454 MPASS(error == 0); \ 455 } while (0) 456 457 ip6proto_input_t rip6_input; 458 ip6proto_ctlinput_t rip6_ctlinput; 459 460 #endif /* _KERNEL */ 461 462 #endif /* !_NETINET6_IP6_VAR_H_ */ 463