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 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 63 * $FreeBSD$ 64 */ 65 66 #ifndef _NETINET6_IP6_VAR_H_ 67 #define _NETINET6_IP6_VAR_H_ 68 69 #include <sys/epoch.h> 70 71 #ifdef _KERNEL 72 struct ip6asfrag; /* frag6.c */ 73 TAILQ_HEAD(ip6fraghead, ip6asfrag); 74 75 /* 76 * IP6 reassembly queue structure. Each fragment 77 * being reassembled is attached to one of these structures. 78 */ 79 struct ip6q { 80 struct ip6fraghead ip6q_frags; 81 u_int32_t ip6q_ident; 82 u_int8_t ip6q_nxt; 83 u_int8_t ip6q_ecn; 84 u_int8_t ip6q_ttl; 85 struct in6_addr ip6q_src, ip6q_dst; 86 TAILQ_ENTRY(ip6q) ip6q_tq; 87 int ip6q_unfrglen; /* len of unfragmentable part */ 88 int ip6q_nfrag; /* # of fragments */ 89 struct label *ip6q_label; 90 }; 91 #endif /* _KERNEL */ 92 93 /* 94 * IP6 reinjecting structure. 95 */ 96 struct ip6_direct_ctx { 97 uint32_t ip6dc_nxt; /* next header to process */ 98 uint32_t ip6dc_off; /* offset to next header */ 99 }; 100 101 #if defined(_NETINET6_IN6_VAR_H_) && defined(_KERNEL) 102 /* 103 * Structure attached to inpcb.in6p_moptions and 104 * passed to ip6_output when IPv6 multicast options are in use. 105 * This structure is lazy-allocated. 106 */ 107 struct ip6_moptions { 108 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 109 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 110 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 111 struct ip6_mfilter_head im6o_head; /* group membership list */ 112 }; 113 #else 114 struct ip6_moptions; 115 #endif 116 /* 117 * Control options for outgoing packets 118 */ 119 120 /* Routing header related info */ 121 struct ip6po_rhinfo { 122 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 123 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 124 }; 125 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 126 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 127 128 /* Nexthop related info */ 129 struct ip6po_nhinfo { 130 struct sockaddr *ip6po_nhi_nexthop; 131 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 132 }; 133 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 134 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 135 136 struct ip6_pktopts { 137 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 138 int ip6po_hlim; /* Hoplimit for outgoing packets */ 139 140 /* Outgoing IF/address information */ 141 struct in6_pktinfo *ip6po_pktinfo; 142 143 /* Next-hop address information */ 144 struct ip6po_nhinfo ip6po_nhinfo; 145 146 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 147 148 /* Destination options header (before a routing header) */ 149 struct ip6_dest *ip6po_dest1; 150 151 /* Routing header related info. */ 152 struct ip6po_rhinfo ip6po_rhinfo; 153 154 /* Destination options header (after a routing header) */ 155 struct ip6_dest *ip6po_dest2; 156 157 int ip6po_tclass; /* traffic class */ 158 159 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 160 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 161 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 162 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 163 164 int ip6po_prefer_tempaddr; /* whether temporary addresses are 165 preferred as source address */ 166 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 167 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 168 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 169 170 int ip6po_flags; 171 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 172 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 173 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 174 #endif 175 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 176 #define IP6PO_USECOA 0x08 /* use care of address */ 177 }; 178 179 /* 180 * Control options for incoming packets 181 */ 182 183 struct ip6stat { 184 uint64_t ip6s_total; /* total packets received */ 185 uint64_t ip6s_tooshort; /* packet too short */ 186 uint64_t ip6s_toosmall; /* not enough data */ 187 uint64_t ip6s_fragments; /* fragments received */ 188 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 189 uint64_t ip6s_fragtimeout; /* fragments timed out */ 190 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 191 uint64_t ip6s_forward; /* packets forwarded */ 192 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 193 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 194 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 195 uint64_t ip6s_localout; /* total ip packets generated here */ 196 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 197 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 198 uint64_t ip6s_atomicfrags; /* atomic fragments */ 199 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 200 uint64_t ip6s_ofragments; /* output fragments created */ 201 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 202 uint64_t ip6s_badoptions; /* error in option processing */ 203 uint64_t ip6s_noroute; /* packets discarded due to no route */ 204 uint64_t ip6s_badvers; /* ip6 version != 6 */ 205 uint64_t ip6s_rawout; /* total raw ip packets generated */ 206 uint64_t ip6s_badscope; /* scope error */ 207 uint64_t ip6s_notmember; /* don't join this multicast group */ 208 #define IP6S_HDRCNT 256 /* headers count */ 209 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 210 uint64_t ip6s_m1; /* one mbuf */ 211 #define IP6S_M2MMAX 32 212 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 213 uint64_t ip6s_mext1; /* one ext mbuf */ 214 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 215 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 216 uint64_t ip6s_nogif; /* no match gif found */ 217 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 218 219 /* 220 * statistics for improvement of the source address selection 221 * algorithm: 222 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 223 */ 224 #define IP6S_RULESMAX 16 225 #define IP6S_SCOPECNT 16 226 /* number of times that address selection fails */ 227 uint64_t ip6s_sources_none; 228 /* number of times that an address on the outgoing I/F is chosen */ 229 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 230 /* number of times that an address on a non-outgoing I/F is chosen */ 231 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 232 /* 233 * number of times that an address that has the same scope 234 * from the destination is chosen. 235 */ 236 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 237 /* 238 * number of times that an address that has a different scope 239 * from the destination is chosen. 240 */ 241 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 242 /* number of times that a deprecated address is chosen */ 243 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 244 245 /* number of times that each rule of source selection is applied. */ 246 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 247 }; 248 249 #ifdef _KERNEL 250 #include <sys/counter.h> 251 252 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 253 #define IP6STAT_ADD(name, val) \ 254 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) 255 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 256 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 257 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 258 #endif 259 260 #ifdef _KERNEL 261 /* flags passed to ip6_output as last parameter */ 262 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 263 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 264 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 265 266 #ifdef __NO_STRICT_ALIGNMENT 267 #define IP6_HDR_ALIGNED_P(ip) 1 268 #else 269 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 270 #endif 271 272 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 273 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 274 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 275 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 276 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 277 * walk list every 5 sec. */ 278 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 279 VNET_DECLARE(int, ip6_v6only); 280 #define V_ip6_defhlim VNET(ip6_defhlim) 281 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 282 #define V_ip6_forwarding VNET(ip6_forwarding) 283 #define V_ip6_use_deprecated VNET(ip6_use_deprecated) 284 #define V_ip6_rr_prune VNET(ip6_rr_prune) 285 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 286 #define V_ip6_v6only VNET(ip6_v6only) 287 288 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 289 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 290 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 291 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 292 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 293 * receiving IF. */ 294 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 295 forwarding enabled */ 296 VNET_DECLARE(int, ip6_log_interval); 297 VNET_DECLARE(time_t, ip6_log_time); 298 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 299 * headers */ 300 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 301 #define V_ip6_mrouter VNET(ip6_mrouter) 302 #define V_ip6_sendredirects VNET(ip6_sendredirects) 303 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 304 #define V_ip6_no_radr VNET(ip6_no_radr) 305 #define V_ip6_norbit_raif VNET(ip6_norbit_raif) 306 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 307 #define V_ip6_log_interval VNET(ip6_log_interval) 308 #define V_ip6_log_time VNET(ip6_log_time) 309 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 310 #define V_ip6_dad_count VNET(ip6_dad_count) 311 312 VNET_DECLARE(int, ip6_auto_flowlabel); 313 VNET_DECLARE(int, ip6_auto_linklocal); 314 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 315 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 316 317 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 318 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 319 * addresses in the source address 320 * selection */ 321 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 322 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 323 324 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 325 * zone when unspecified */ 326 #define V_ip6_use_defzone VNET(ip6_use_defzone) 327 328 VNET_DECLARE(struct pfil_head *, inet6_pfil_head); 329 #define V_inet6_pfil_head VNET(inet6_pfil_head) 330 #define PFIL_INET6_NAME "inet6" 331 332 #ifdef IPSTEALTH 333 VNET_DECLARE(int, ip6stealth); 334 #define V_ip6stealth VNET(ip6stealth) 335 #endif 336 337 #ifdef EXPERIMENTAL 338 VNET_DECLARE(int, nd6_ignore_ipv6_only_ra); 339 #define V_nd6_ignore_ipv6_only_ra VNET(nd6_ignore_ipv6_only_ra) 340 #endif 341 342 extern struct pr_usrreqs rip6_usrreqs; 343 struct sockopt; 344 345 struct inpcb; 346 347 int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 348 349 struct in6_ifaddr; 350 int ip6proto_register(short); 351 int ip6proto_unregister(short); 352 353 void ip6_input(struct mbuf *); 354 void ip6_direct_input(struct mbuf *); 355 void ip6_freepcbopts(struct ip6_pktopts *); 356 357 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 358 int ip6_get_prevhdr(const struct mbuf *, int); 359 int ip6_nexthdr(const struct mbuf *, int, int, int *); 360 int ip6_lasthdr(const struct mbuf *, int, int, int *); 361 362 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 363 struct mbuf *); 364 365 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 366 u_int32_t *); 367 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 368 struct mbuf **, int *); 369 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 370 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 371 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 372 373 void ip6_forward(struct mbuf *, int); 374 375 void ip6_mloopback(struct ifnet *, struct mbuf *); 376 int ip6_output(struct mbuf *, struct ip6_pktopts *, 377 struct route_in6 *, 378 int, 379 struct ip6_moptions *, struct ifnet **, 380 struct inpcb *); 381 int ip6_ctloutput(struct socket *, struct sockopt *); 382 int ip6_raw_ctloutput(struct socket *, struct sockopt *); 383 void ip6_initpktopts(struct ip6_pktopts *); 384 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 385 struct ip6_pktopts *, struct ucred *, int); 386 void ip6_clearpktopts(struct ip6_pktopts *, int); 387 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 388 int ip6_optlen(struct inpcb *); 389 int ip6_deletefraghdr(struct mbuf *, int, int); 390 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 391 uint32_t); 392 393 int route6_input(struct mbuf **, int *, int); 394 395 void frag6_init(void); 396 void frag6_destroy(void); 397 int frag6_input(struct mbuf **, int *, int); 398 void frag6_slowtimo(void); 399 void frag6_drain(void); 400 401 void rip6_init(void); 402 int rip6_input(struct mbuf **, int *, int); 403 void rip6_ctlinput(int, struct sockaddr *, void *); 404 int rip6_ctloutput(struct socket *, struct sockopt *); 405 int rip6_output(struct mbuf *, struct socket *, ...); 406 int rip6_usrreq(struct socket *, 407 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 408 409 int dest6_input(struct mbuf **, int *, int); 410 int none_input(struct mbuf **, int *, int); 411 412 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 413 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 414 int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 415 uint32_t, struct ifnet *, struct in6_addr *, int *); 416 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 417 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 418 struct nhop_object **, u_int, uint32_t); 419 u_int32_t ip6_randomid(void); 420 u_int32_t ip6_randomflowlabel(void); 421 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 422 #endif /* _KERNEL */ 423 424 #endif /* !_NETINET6_IP6_VAR_H_ */ 425