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 /* 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 */ 141 struct 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 */ 197 198 struct 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> 267 268 VNET_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 295 296 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 297 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 298 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 299 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 300 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 301 * walk list every 5 sec. */ 302 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 303 VNET_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) 311 312 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 313 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 314 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 315 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 316 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 317 * receiving IF. */ 318 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 319 forwarding enabled */ 320 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 321 * headers */ 322 VNET_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) 331 332 VNET_DECLARE(int, ip6_auto_flowlabel); 333 VNET_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) 336 337 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 338 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 339 * addresses in the source address 340 * selection */ 341 VNET_DECLARE(bool, ip6_use_stableaddr); /* Whether to use stable address generation (RFC 7217) */ 342 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 343 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 344 #define V_ip6_use_stableaddr VNET(ip6_use_stableaddr) 345 346 #define IP6_IDGEN_RETRIES 3 /* RFC 7217 section 7 default max retries */ 347 VNET_DECLARE(int, ip6_stableaddr_maxretries); 348 #define V_ip6_stableaddr_maxretries VNET(ip6_stableaddr_maxretries) 349 350 #define IP6_STABLEADDR_NETIFSRC_NAME 0 351 #define IP6_STABLEADDR_NETIFSRC_ID 1 352 #define IP6_STABLEADDR_NETIFSRC_MAC 2 353 VNET_DECLARE(int, ip6_stableaddr_netifsource); 354 #define V_ip6_stableaddr_netifsource VNET(ip6_stableaddr_netifsource) 355 356 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 357 * zone when unspecified */ 358 #define V_ip6_use_defzone VNET(ip6_use_defzone) 359 360 VNET_DECLARE(struct pfil_head *, inet6_pfil_head); 361 #define V_inet6_pfil_head VNET(inet6_pfil_head) 362 #define PFIL_INET6_NAME "inet6" 363 364 VNET_DECLARE(struct pfil_head *, inet6_local_pfil_head); 365 #define V_inet6_local_pfil_head VNET(inet6_local_pfil_head) 366 #define PFIL_INET6_LOCAL_NAME "inet6-local" 367 368 #ifdef IPSTEALTH 369 VNET_DECLARE(int, ip6stealth); 370 #define V_ip6stealth VNET(ip6stealth) 371 #endif 372 373 VNET_DECLARE(bool, ip6_log_cannot_forward); 374 #define V_ip6_log_cannot_forward VNET(ip6_log_cannot_forward) 375 376 extern struct pr_usrreqs rip6_usrreqs; 377 struct sockopt; 378 379 struct inpcb; 380 struct ucred; 381 382 int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 383 384 void ip6_input(struct mbuf *); 385 void ip6_direct_input(struct mbuf *); 386 void ip6_freepcbopts(struct ip6_pktopts *); 387 388 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 389 int ip6_get_prevhdr(const struct mbuf *, int); 390 int ip6_nexthdr(const struct mbuf *, int, int, int *); 391 int ip6_lasthdr(const struct mbuf *, int, int, int *); 392 393 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 394 struct mbuf *); 395 396 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 397 u_int32_t *); 398 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 399 struct mbuf **, int *); 400 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 401 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 402 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 403 404 void ip6_forward(struct mbuf *, int); 405 406 void ip6_mloopback(struct ifnet *, struct mbuf *); 407 int ip6_output(struct mbuf *, struct ip6_pktopts *, 408 struct route_in6 *, 409 int, 410 struct ip6_moptions *, struct ifnet **, 411 struct inpcb *); 412 int ip6_ctloutput(struct socket *, struct sockopt *); 413 int ip6_raw_ctloutput(struct socket *, struct sockopt *); 414 void ip6_initpktopts(struct ip6_pktopts *); 415 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 416 struct ip6_pktopts *, struct ucred *, int); 417 void ip6_clearpktopts(struct ip6_pktopts *, int); 418 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 419 int ip6_optlen(struct inpcb *); 420 int ip6_deletefraghdr(struct mbuf *, int, int); 421 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 422 uint32_t); 423 424 int route6_input(struct mbuf **, int *, int); 425 426 void frag6_init(void); 427 void frag6_destroy(void); 428 int frag6_input(struct mbuf **, int *, int); 429 void frag6_drain(void *, int); 430 431 void rip6_init(void); 432 int rip6_ctloutput(struct socket *, struct sockopt *); 433 int rip6_usrreq(struct socket *, 434 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 435 436 int dest6_input(struct mbuf **, int *, int); 437 int none_input(struct mbuf **, int *, int); 438 439 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 440 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 441 int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 442 uint32_t, struct ifnet *, struct in6_addr *, int *); 443 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 444 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 445 struct nhop_object **, u_int, uint32_t); 446 u_int32_t ip6_randomid(void); 447 u_int32_t ip6_randomflowlabel(void); 448 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 449 450 int ip6_log_ratelimit(void); 451 452 /* 453 * Argument type for the last arg of ip6proto_ctlinput_t(). 454 * 455 * IPv6 ICMP IPv6 [exthdrs] finalhdr payload 456 * ^ ^ ^ ^ 457 * | | ip6c_ip6 ip6c_off 458 * | ip6c_icmp6 459 * ip6c_m 460 * 461 * ip6c_finaldst's sin6_addr usually points to ip6c_ip6->ip6_dst. If the 462 * original * (internal) packet carries a routing header, it may point the 463 * final * destination address in the routing header. 464 * 465 * ip6c_src: ip6c_ip6->ip6_src + scope info + flowlabel in ip6c_ip6 466 * (beware of flowlabel, if you try to compare it against others) 467 * ip6c_dst: ip6c_finaldst + scope info 468 */ 469 struct ip6ctlparam { 470 struct mbuf *ip6c_m; /* start of mbuf chain */ 471 struct icmp6_hdr *ip6c_icmp6; /* icmp6 header of target packet */ 472 struct ip6_hdr *ip6c_ip6; /* ip6 header of target packet */ 473 int ip6c_off; /* offset of the target proto header */ 474 struct sockaddr_in6 *ip6c_src; /* srcaddr w/ additional info */ 475 struct sockaddr_in6 *ip6c_dst; /* (final) dstaddr w/ additional info */ 476 struct sockaddr_in6 *ip6c_finaldst; /* final destination address */ 477 void *ip6c_cmdarg; /* control command dependent data */ 478 u_int8_t ip6c_nxt; /* final next header field */ 479 }; 480 481 typedef int ip6proto_input_t(struct mbuf **, int *, int); 482 typedef void ip6proto_ctlinput_t(struct ip6ctlparam *); 483 int ip6proto_register(uint8_t, ip6proto_input_t, ip6proto_ctlinput_t); 484 int ip6proto_unregister(uint8_t); 485 #define IP6PROTO_REGISTER(prot, input, ctl) do { \ 486 int error __diagused; \ 487 error = ip6proto_register(prot, input, ctl); \ 488 MPASS(error == 0); \ 489 } while (0) 490 491 ip6proto_input_t rip6_input; 492 ip6proto_ctlinput_t rip6_ctlinput; 493 494 #endif /* _KERNEL */ 495 496 #endif /* !_NETINET6_IP6_VAR_H_ */ 497