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 69struct ip6asfrag; /* frag6.c */ 70TAILQ_HEAD(ip6fraghead, ip6asfrag); 71 72/* 73 * IP6 reassembly queue structure. Each fragment 74 * being reassembled is attached to one of these structures. 75 */ 76struct 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 */ 93struct 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 */ 104struct 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 111struct ip6_moptions; 112#endif 113/* 114 * Control options for outgoing packets 115 */ 116 117/* Routing header related info */ 118struct 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 */ 126struct 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/* 134 * Note that fields with valid data must be flagged in ip6po_valid. 135 * This is done to reduce cache misses in ip6_output(). Before 136 * ip6po_valid, ip6_output needed to check all the individual fields 137 * of ip6_pktopts needed to be checked themselves, and they are spread 138 * across 4 cachelines. ip6_output() is currently the only consumer of 139 * these flags, as it is in the critical path of every packet sent. 140 */ 141struct ip6_pktopts { 142 uint32_t ip6po_valid; 143#define IP6PO_VALID_HLIM 0x0001 144#define IP6PO_VALID_PKTINFO 0x0002 145#define IP6PO_VALID_NHINFO 0x0004 146#define IP6PO_VALID_HBH 0x0008 147#define IP6PO_VALID_DEST1 0x0010 148#define IP6PO_VALID_RHINFO 0x0020 149#define IP6PO_VALID_DEST2 0x0040 150#define IP6PO_VALID_TC 0x0080 151 152 int ip6po_hlim; /* Hoplimit for outgoing packets */ 153 int ip6po_tclass; /* traffic class */ 154 155 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 156#define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 157#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 158#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 159 160 int ip6po_prefer_tempaddr; /* whether temporary addresses are 161 preferred as source address */ 162#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 163#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 164#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 165 166 int ip6po_flags; 167#if 0 /* parameters in this block is obsolete. do not reuse the values. */ 168#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 169#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 170#endif 171#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 172#define IP6PO_USECOA 0x08 /* use care of address */ 173 174 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 175 176 /* Outgoing IF/address information */ 177 struct in6_pktinfo *ip6po_pktinfo; 178 179 /* Next-hop address information */ 180 struct ip6po_nhinfo ip6po_nhinfo; 181 182 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 183 184 /* Destination options header (before a routing header) */ 185 struct ip6_dest *ip6po_dest1; 186 187 /* Routing header related info. */ 188 struct ip6po_rhinfo ip6po_rhinfo; 189 190 /* Destination options header (after a routing header) */ 191 struct ip6_dest *ip6po_dest2; 192}; 193 194/* 195 * Control options for incoming packets 196 */ 197 198struct ip6stat { 199 uint64_t ip6s_total; /* total packets received */ 200 uint64_t ip6s_tooshort; /* packet too short */ 201 uint64_t ip6s_toosmall; /* not enough data */ 202 uint64_t ip6s_fragments; /* fragments received */ 203 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 204 uint64_t ip6s_fragtimeout; /* fragments timed out */ 205 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 206 uint64_t ip6s_forward; /* packets forwarded */ 207 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 208 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 209 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 210 uint64_t ip6s_localout; /* total ip packets generated here */ 211 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 212 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 213 uint64_t ip6s_atomicfrags; /* atomic fragments */ 214 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 215 uint64_t ip6s_ofragments; /* output fragments created */ 216 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 217 uint64_t ip6s_badoptions; /* error in option processing */ 218 uint64_t ip6s_noroute; /* packets discarded due to no route */ 219 uint64_t ip6s_badvers; /* ip6 version != 6 */ 220 uint64_t ip6s_rawout; /* total raw ip packets generated */ 221 uint64_t ip6s_badscope; /* scope error */ 222 uint64_t ip6s_notmember; /* don't join this multicast group */ 223#define IP6S_HDRCNT 256 /* headers count */ 224 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 225 uint64_t ip6s_m1; /* one mbuf */ 226#define IP6S_M2MMAX 32 227 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 228 uint64_t ip6s_mext1; /* one ext mbuf */ 229 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 230 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 231 uint64_t ip6s_nogif; /* no match gif found */ 232 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 233 234 /* 235 * statistics for improvement of the source address selection 236 * algorithm: 237 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 238 */ 239#define IP6S_RULESMAX 16 240#define IP6S_SCOPECNT 16 241 /* number of times that address selection fails */ 242 uint64_t ip6s_sources_none; 243 /* number of times that an address on the outgoing I/F is chosen */ 244 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 245 /* number of times that an address on a non-outgoing I/F is chosen */ 246 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 247 /* 248 * number of times that an address that has the same scope 249 * from the destination is chosen. 250 */ 251 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 252 /* 253 * number of times that an address that has a different scope 254 * from the destination is chosen. 255 */ 256 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 257 /* number of times that a deprecated address is chosen */ 258 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 259 260 /* number of times that each rule of source selection is applied. */ 261 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 262}; 263 264#ifdef _KERNEL 265#include <sys/counter.h> 266#include <netinet/in_kdtrace.h> 267 268VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 269#define IP6STAT_ADD(name, val) \ 270 do { \ 271 MIB_SDT_PROBE1(ip6, count, name, (val)); \ 272 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)); \ 273 } while (0) 274#define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 275#define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 276#define IP6STAT_INC2(name, type) \ 277 do { \ 278 MIB_SDT_PROBE2(ip6, count, name, 1, type); \ 279 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, 1); \ 280 } while (0) 281#define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 282#endif 283 284#ifdef _KERNEL 285/* flags passed to ip6_output as last parameter */ 286#define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 287#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 288#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 289 290#ifdef __NO_STRICT_ALIGNMENT 291#define IP6_HDR_ALIGNED_P(ip) 1 292#else 293#define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 294#endif 295 296VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 297VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 298VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 299VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 300VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 301 * walk list every 5 sec. */ 302VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 303VNET_DECLARE(int, ip6_v6only); 304#define V_ip6_defhlim VNET(ip6_defhlim) 305#define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 306#define V_ip6_forwarding VNET(ip6_forwarding) 307#define V_ip6_use_deprecated VNET(ip6_use_deprecated) 308#define V_ip6_rr_prune VNET(ip6_rr_prune) 309#define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 310#define V_ip6_v6only VNET(ip6_v6only) 311 312VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 313VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 314VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 315VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 316VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 317 * receiving IF. */ 318VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 319 forwarding enabled */ 320VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 321 * headers */ 322VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 323#define V_ip6_mrouter VNET(ip6_mrouter) 324#define V_ip6_sendredirects VNET(ip6_sendredirects) 325#define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 326#define V_ip6_no_radr VNET(ip6_no_radr) 327#define V_ip6_norbit_raif VNET(ip6_norbit_raif) 328#define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 329#define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 330#define V_ip6_dad_count VNET(ip6_dad_count) 331 332VNET_DECLARE(int, ip6_auto_flowlabel); 333VNET_DECLARE(int, ip6_auto_linklocal); 334#define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 335#define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 336 337VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 338VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 339 * addresses in the source address 340 * selection */ 341#define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 342#define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 343 344VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 345 * zone when unspecified */ 346#define V_ip6_use_defzone VNET(ip6_use_defzone) 347 348VNET_DECLARE(struct pfil_head *, inet6_pfil_head); 349#define V_inet6_pfil_head VNET(inet6_pfil_head) 350#define PFIL_INET6_NAME "inet6" 351 352VNET_DECLARE(struct pfil_head *, inet6_local_pfil_head); 353#define V_inet6_local_pfil_head VNET(inet6_local_pfil_head) 354#define PFIL_INET6_LOCAL_NAME "inet6-local" 355 356#ifdef IPSTEALTH 357VNET_DECLARE(int, ip6stealth); 358#define V_ip6stealth VNET(ip6stealth) 359#endif 360 361VNET_DECLARE(bool, ip6_log_cannot_forward); 362#define V_ip6_log_cannot_forward VNET(ip6_log_cannot_forward) 363 364extern struct pr_usrreqs rip6_usrreqs; 365struct sockopt; 366 367struct inpcb; 368struct ucred; 369 370int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 371 372void ip6_input(struct mbuf *); 373void ip6_direct_input(struct mbuf *); 374void ip6_freepcbopts(struct ip6_pktopts *); 375 376int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 377int ip6_get_prevhdr(const struct mbuf *, int); 378int ip6_nexthdr(const struct mbuf *, int, int, int *); 379int ip6_lasthdr(const struct mbuf *, int, int, int *); 380 381extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 382 struct mbuf *); 383 384int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 385 u_int32_t *); 386struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 387 struct mbuf **, int *); 388void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 389void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 390int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 391 392void ip6_forward(struct mbuf *, int); 393 394void ip6_mloopback(struct ifnet *, struct mbuf *); 395int ip6_output(struct mbuf *, struct ip6_pktopts *, 396 struct route_in6 *, 397 int, 398 struct ip6_moptions *, struct ifnet **, 399 struct inpcb *); 400int ip6_ctloutput(struct socket *, struct sockopt *); 401int ip6_raw_ctloutput(struct socket *, struct sockopt *); 402void ip6_initpktopts(struct ip6_pktopts *); 403int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 404 struct ip6_pktopts *, struct ucred *, int); 405void ip6_clearpktopts(struct ip6_pktopts *, int); 406struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 407int ip6_optlen(struct inpcb *); 408int ip6_deletefraghdr(struct mbuf *, int, int); 409int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 410 uint32_t); 411 412int route6_input(struct mbuf **, int *, int); 413 414void frag6_init(void); 415void frag6_destroy(void); 416int frag6_input(struct mbuf **, int *, int); 417void frag6_drain(void); 418 419void rip6_init(void); 420int rip6_ctloutput(struct socket *, struct sockopt *); 421int rip6_usrreq(struct socket *, 422 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 423 424int dest6_input(struct mbuf **, int *, int); 425int none_input(struct mbuf **, int *, int); 426 427int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 428 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 429int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 430 uint32_t, struct ifnet *, struct in6_addr *, int *); 431int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 432 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 433 struct nhop_object **, u_int, uint32_t); 434u_int32_t ip6_randomid(void); 435u_int32_t ip6_randomflowlabel(void); 436void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 437 438int ip6_log_ratelimit(void); 439 440/* 441 * Argument type for the last arg of ip6proto_ctlinput_t(). 442 * 443 * IPv6 ICMP IPv6 [exthdrs] finalhdr payload 444 * ^ ^ ^ ^ 445 * | | ip6c_ip6 ip6c_off 446 * | ip6c_icmp6 447 * ip6c_m 448 * 449 * ip6c_finaldst's sin6_addr usually points to ip6c_ip6->ip6_dst. If the 450 * original * (internal) packet carries a routing header, it may point the 451 * final * destination address in the routing header. 452 * 453 * ip6c_src: ip6c_ip6->ip6_src + scope info + flowlabel in ip6c_ip6 454 * (beware of flowlabel, if you try to compare it against others) 455 * ip6c_dst: ip6c_finaldst + scope info 456 */ 457struct ip6ctlparam { 458 struct mbuf *ip6c_m; /* start of mbuf chain */ 459 struct icmp6_hdr *ip6c_icmp6; /* icmp6 header of target packet */ 460 struct ip6_hdr *ip6c_ip6; /* ip6 header of target packet */ 461 int ip6c_off; /* offset of the target proto header */ 462 struct sockaddr_in6 *ip6c_src; /* srcaddr w/ additional info */ 463 struct sockaddr_in6 *ip6c_dst; /* (final) dstaddr w/ additional info */ 464 struct sockaddr_in6 *ip6c_finaldst; /* final destination address */ 465 void *ip6c_cmdarg; /* control command dependent data */ 466 u_int8_t ip6c_nxt; /* final next header field */ 467}; 468 469typedef int ip6proto_input_t(struct mbuf **, int *, int); 470typedef void ip6proto_ctlinput_t(struct ip6ctlparam *); 471int ip6proto_register(uint8_t, ip6proto_input_t, ip6proto_ctlinput_t); 472int ip6proto_unregister(uint8_t); 473#define IP6PROTO_REGISTER(prot, input, ctl) do { \ 474 int error __diagused; \ 475 error = ip6proto_register(prot, input, ctl); \ 476 MPASS(error == 0); \ 477} while (0) 478 479ip6proto_input_t rip6_input; 480ip6proto_ctlinput_t rip6_ctlinput; 481 482#endif /* _KERNEL */ 483 484#endif /* !_NETINET6_IP6_VAR_H_ */ 485