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 struct ip6asfrag; 72 /* 73 * IP6 reassembly queue structure. Each fragment 74 * being reassembled is attached to one of these structures. 75 */ 76 struct ip6q { 77 struct ip6asfrag *ip6q_down; 78 struct ip6asfrag *ip6q_up; 79 u_int32_t ip6q_ident; 80 u_int8_t ip6q_nxt; 81 u_int8_t ip6q_ecn; 82 u_int8_t ip6q_ttl; 83 struct in6_addr ip6q_src, ip6q_dst; 84 struct ip6q *ip6q_next; 85 struct ip6q *ip6q_prev; 86 int ip6q_unfrglen; /* len of unfragmentable part */ 87 int ip6q_nfrag; /* # of fragments */ 88 struct label *ip6q_label; 89 }; 90 91 /* 92 * IP6 reinjecting structure. 93 */ 94 struct ip6_direct_ctx { 95 uint32_t ip6dc_nxt; /* next header to process */ 96 uint32_t ip6dc_off; /* offset to next header */ 97 }; 98 99 #if defined(_NETINET6_IN6_VAR_H_) && defined(_KERNEL) 100 /* 101 * Structure attached to inpcb.in6p_moptions and 102 * passed to ip6_output when IPv6 multicast options are in use. 103 * This structure is lazy-allocated. 104 */ 105 struct ip6_moptions { 106 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 107 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 108 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 109 struct ip6_mfilter_head im6o_head; /* group membership list */ 110 }; 111 #else 112 struct ip6_moptions; 113 #endif 114 /* 115 * Control options for outgoing packets 116 */ 117 118 /* Routing header related info */ 119 struct ip6po_rhinfo { 120 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 121 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 122 }; 123 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 124 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 125 126 /* Nexthop related info */ 127 struct ip6po_nhinfo { 128 struct sockaddr *ip6po_nhi_nexthop; 129 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 130 }; 131 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 132 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 133 134 struct ip6_pktopts { 135 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 136 int ip6po_hlim; /* Hoplimit for outgoing packets */ 137 138 /* Outgoing IF/address information */ 139 struct in6_pktinfo *ip6po_pktinfo; 140 141 /* Next-hop address information */ 142 struct ip6po_nhinfo ip6po_nhinfo; 143 144 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 145 146 /* Destination options header (before a routing header) */ 147 struct ip6_dest *ip6po_dest1; 148 149 /* Routing header related info. */ 150 struct ip6po_rhinfo ip6po_rhinfo; 151 152 /* Destination options header (after a routing header) */ 153 struct ip6_dest *ip6po_dest2; 154 155 int ip6po_tclass; /* traffic class */ 156 157 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 158 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 159 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 160 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 161 162 int ip6po_prefer_tempaddr; /* whether temporary addresses are 163 preferred as source address */ 164 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 165 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 166 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 167 168 int ip6po_flags; 169 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 170 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 171 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 172 #endif 173 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 174 #define IP6PO_USECOA 0x08 /* use care of address */ 175 }; 176 177 /* 178 * Control options for incoming packets 179 */ 180 181 struct ip6stat { 182 uint64_t ip6s_total; /* total packets received */ 183 uint64_t ip6s_tooshort; /* packet too short */ 184 uint64_t ip6s_toosmall; /* not enough data */ 185 uint64_t ip6s_fragments; /* fragments received */ 186 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 187 uint64_t ip6s_fragtimeout; /* fragments timed out */ 188 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 189 uint64_t ip6s_forward; /* packets forwarded */ 190 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 191 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 192 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 193 uint64_t ip6s_localout; /* total ip packets generated here */ 194 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 195 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 196 uint64_t ip6s_atomicfrags; /* atomic fragments */ 197 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 198 uint64_t ip6s_ofragments; /* output fragments created */ 199 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 200 uint64_t ip6s_badoptions; /* error in option processing */ 201 uint64_t ip6s_noroute; /* packets discarded due to no route */ 202 uint64_t ip6s_badvers; /* ip6 version != 6 */ 203 uint64_t ip6s_rawout; /* total raw ip packets generated */ 204 uint64_t ip6s_badscope; /* scope error */ 205 uint64_t ip6s_notmember; /* don't join this multicast group */ 206 #define IP6S_HDRCNT 256 /* headers count */ 207 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 208 uint64_t ip6s_m1; /* one mbuf */ 209 #define IP6S_M2MMAX 32 210 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 211 uint64_t ip6s_mext1; /* one ext mbuf */ 212 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 213 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 214 uint64_t ip6s_nogif; /* no match gif found */ 215 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 216 217 /* 218 * statistics for improvement of the source address selection 219 * algorithm: 220 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 221 */ 222 #define IP6S_RULESMAX 16 223 #define IP6S_SCOPECNT 16 224 /* number of times that address selection fails */ 225 uint64_t ip6s_sources_none; 226 /* number of times that an address on the outgoing I/F is chosen */ 227 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 228 /* number of times that an address on a non-outgoing I/F is chosen */ 229 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 230 /* 231 * number of times that an address that has the same scope 232 * from the destination is chosen. 233 */ 234 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 235 /* 236 * number of times that an address that has a different scope 237 * from the destination is chosen. 238 */ 239 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 240 /* number of times that a deprecated address is chosen */ 241 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 242 243 /* number of times that each rule of source selection is applied. */ 244 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 245 }; 246 247 #ifdef _KERNEL 248 #include <sys/counter.h> 249 250 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 251 #define IP6STAT_ADD(name, val) \ 252 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) 253 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 254 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 255 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 256 #endif 257 258 #ifdef _KERNEL 259 /* flags passed to ip6_output as last parameter */ 260 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 261 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 262 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 263 264 #ifdef __NO_STRICT_ALIGNMENT 265 #define IP6_HDR_ALIGNED_P(ip) 1 266 #else 267 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 268 #endif 269 270 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 271 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 272 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 273 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 274 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 275 * walk list every 5 sec. */ 276 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 277 VNET_DECLARE(int, ip6_v6only); 278 #define V_ip6_defhlim VNET(ip6_defhlim) 279 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 280 #define V_ip6_forwarding VNET(ip6_forwarding) 281 #define V_ip6_use_deprecated VNET(ip6_use_deprecated) 282 #define V_ip6_rr_prune VNET(ip6_rr_prune) 283 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 284 #define V_ip6_v6only VNET(ip6_v6only) 285 286 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 287 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 288 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 289 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 290 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 291 * receiving IF. */ 292 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 293 forwarding enabled */ 294 VNET_DECLARE(int, ip6_log_interval); 295 VNET_DECLARE(time_t, ip6_log_time); 296 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 297 * headers */ 298 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 299 #define V_ip6_mrouter VNET(ip6_mrouter) 300 #define V_ip6_sendredirects VNET(ip6_sendredirects) 301 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 302 #define V_ip6_no_radr VNET(ip6_no_radr) 303 #define V_ip6_norbit_raif VNET(ip6_norbit_raif) 304 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 305 #define V_ip6_log_interval VNET(ip6_log_interval) 306 #define V_ip6_log_time VNET(ip6_log_time) 307 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 308 #define V_ip6_dad_count VNET(ip6_dad_count) 309 310 VNET_DECLARE(int, ip6_auto_flowlabel); 311 VNET_DECLARE(int, ip6_auto_linklocal); 312 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 313 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 314 315 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 316 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 317 * addresses in the source address 318 * selection */ 319 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 320 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 321 322 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 323 * zone when unspecified */ 324 #define V_ip6_use_defzone VNET(ip6_use_defzone) 325 326 VNET_DECLARE(struct pfil_head *, inet6_pfil_head); 327 #define V_inet6_pfil_head VNET(inet6_pfil_head) 328 #define PFIL_INET6_NAME "inet6" 329 330 #ifdef IPSTEALTH 331 VNET_DECLARE(int, ip6stealth); 332 #define V_ip6stealth VNET(ip6stealth) 333 #endif 334 335 #ifdef EXPERIMENTAL 336 VNET_DECLARE(int, nd6_ignore_ipv6_only_ra); 337 #define V_nd6_ignore_ipv6_only_ra VNET(nd6_ignore_ipv6_only_ra) 338 #endif 339 340 extern struct pr_usrreqs rip6_usrreqs; 341 struct sockopt; 342 343 struct inpcb; 344 345 int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 346 347 struct in6_ifaddr; 348 void ip6_init(void); 349 int ip6proto_register(short); 350 int ip6proto_unregister(short); 351 352 void ip6_input(struct mbuf *); 353 void ip6_direct_input(struct mbuf *); 354 void ip6_freepcbopts(struct ip6_pktopts *); 355 356 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 357 int ip6_get_prevhdr(const struct mbuf *, int); 358 int ip6_nexthdr(const struct mbuf *, int, int, int *); 359 int ip6_lasthdr(const struct mbuf *, int, int, int *); 360 361 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 362 struct mbuf *); 363 364 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 365 u_int32_t *); 366 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 367 struct mbuf **, int *); 368 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 369 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 370 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 371 372 void ip6_forward(struct mbuf *, int); 373 374 void ip6_mloopback(struct ifnet *, struct mbuf *); 375 int ip6_output(struct mbuf *, struct ip6_pktopts *, 376 struct route_in6 *, 377 int, 378 struct ip6_moptions *, struct ifnet **, 379 struct inpcb *); 380 int ip6_ctloutput(struct socket *, struct sockopt *); 381 int ip6_raw_ctloutput(struct socket *, struct sockopt *); 382 void ip6_initpktopts(struct ip6_pktopts *); 383 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 384 struct ip6_pktopts *, struct ucred *, int); 385 void ip6_clearpktopts(struct ip6_pktopts *, int); 386 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 387 int ip6_optlen(struct inpcb *); 388 int ip6_deletefraghdr(struct mbuf *, int, int); 389 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 390 uint32_t); 391 392 int route6_input(struct mbuf **, int *, int); 393 394 void frag6_init(void); 395 int frag6_input(struct mbuf **, int *, int); 396 void frag6_slowtimo(void); 397 void frag6_drain(void); 398 399 void rip6_init(void); 400 int rip6_input(struct mbuf **, int *, int); 401 void rip6_ctlinput(int, struct sockaddr *, void *); 402 int rip6_ctloutput(struct socket *, struct sockopt *); 403 int rip6_output(struct mbuf *, struct socket *, ...); 404 int rip6_usrreq(struct socket *, 405 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 406 407 int dest6_input(struct mbuf **, int *, int); 408 int none_input(struct mbuf **, int *, int); 409 410 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 411 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 412 int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 413 uint32_t, struct ifnet *, struct in6_addr *, int *); 414 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 415 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 416 struct rtentry **); 417 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *, 418 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 419 struct rtentry **, u_int); 420 u_int32_t ip6_randomid(void); 421 u_int32_t ip6_randomflowlabel(void); 422 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 423 #endif /* _KERNEL */ 424 425 #endif /* !_NETINET6_IP6_VAR_H_ */ 426