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 /* 72 * IP6 reassembly queue structure. Each fragment 73 * being reassembled is attached to one of these structures. 74 */ 75 struct ip6q { 76 struct ip6asfrag *ip6q_down; 77 struct ip6asfrag *ip6q_up; 78 u_int32_t ip6q_ident; 79 u_int8_t ip6q_nxt; 80 u_int8_t ip6q_ecn; 81 u_int8_t ip6q_ttl; 82 struct in6_addr ip6q_src, ip6q_dst; 83 struct ip6q *ip6q_next; 84 struct ip6q *ip6q_prev; 85 int ip6q_unfrglen; /* len of unfragmentable part */ 86 #ifdef notyet 87 u_char *ip6q_nxtp; 88 #endif 89 int ip6q_nfrag; /* # of fragments */ 90 struct label *ip6q_label; 91 }; 92 93 struct ip6asfrag { 94 struct ip6asfrag *ip6af_down; 95 struct ip6asfrag *ip6af_up; 96 struct mbuf *ip6af_m; 97 int ip6af_offset; /* offset in ip6af_m to next header */ 98 int ip6af_frglen; /* fragmentable part length */ 99 int ip6af_off; /* fragment offset */ 100 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 101 }; 102 103 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 104 105 /* 106 * IP6 reinjecting structure. 107 */ 108 struct ip6_direct_ctx { 109 uint32_t ip6dc_nxt; /* next header to process */ 110 uint32_t ip6dc_off; /* offset to next header */ 111 }; 112 113 /* 114 * Structure attached to inpcb.in6p_moptions and 115 * passed to ip6_output when IPv6 multicast options are in use. 116 * This structure is lazy-allocated. 117 */ 118 struct ip6_moptions { 119 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 120 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 121 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 122 u_short im6o_num_memberships; /* no. memberships this socket */ 123 u_short im6o_max_memberships; /* max memberships this socket */ 124 struct in6_multi **im6o_membership; /* group memberships */ 125 struct in6_mfilter *im6o_mfilters; /* source filters */ 126 struct epoch_context imo6_epoch_ctx; 127 }; 128 129 /* 130 * Control options for outgoing packets 131 */ 132 133 /* Routing header related info */ 134 struct ip6po_rhinfo { 135 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 136 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 137 }; 138 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 139 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 140 141 /* Nexthop related info */ 142 struct ip6po_nhinfo { 143 struct sockaddr *ip6po_nhi_nexthop; 144 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 145 }; 146 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 147 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 148 149 struct ip6_pktopts { 150 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 151 int ip6po_hlim; /* Hoplimit for outgoing packets */ 152 153 /* Outgoing IF/address information */ 154 struct in6_pktinfo *ip6po_pktinfo; 155 156 /* Next-hop address information */ 157 struct ip6po_nhinfo ip6po_nhinfo; 158 159 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 160 161 /* Destination options header (before a routing header) */ 162 struct ip6_dest *ip6po_dest1; 163 164 /* Routing header related info. */ 165 struct ip6po_rhinfo ip6po_rhinfo; 166 167 /* Destination options header (after a routing header) */ 168 struct ip6_dest *ip6po_dest2; 169 170 int ip6po_tclass; /* traffic class */ 171 172 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 173 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 174 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 175 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 176 177 int ip6po_prefer_tempaddr; /* whether temporary addresses are 178 preferred as source address */ 179 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 180 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 181 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 182 183 int ip6po_flags; 184 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 185 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 186 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 187 #endif 188 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 189 #define IP6PO_USECOA 0x08 /* use care of address */ 190 }; 191 192 /* 193 * Control options for incoming packets 194 */ 195 196 struct ip6stat { 197 uint64_t ip6s_total; /* total packets received */ 198 uint64_t ip6s_tooshort; /* packet too short */ 199 uint64_t ip6s_toosmall; /* not enough data */ 200 uint64_t ip6s_fragments; /* fragments received */ 201 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 202 uint64_t ip6s_fragtimeout; /* fragments timed out */ 203 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 204 uint64_t ip6s_forward; /* packets forwarded */ 205 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 206 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 207 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 208 uint64_t ip6s_localout; /* total ip packets generated here */ 209 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 210 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 211 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 212 uint64_t ip6s_ofragments; /* output fragments created */ 213 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 214 uint64_t ip6s_badoptions; /* error in option processing */ 215 uint64_t ip6s_noroute; /* packets discarded due to no route */ 216 uint64_t ip6s_badvers; /* ip6 version != 6 */ 217 uint64_t ip6s_rawout; /* total raw ip packets generated */ 218 uint64_t ip6s_badscope; /* scope error */ 219 uint64_t ip6s_notmember; /* don't join this multicast group */ 220 #define IP6S_HDRCNT 256 /* headers count */ 221 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 222 uint64_t ip6s_m1; /* one mbuf */ 223 #define IP6S_M2MMAX 32 224 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 225 uint64_t ip6s_mext1; /* one ext mbuf */ 226 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 227 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 228 uint64_t ip6s_nogif; /* no match gif found */ 229 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 230 231 /* 232 * statistics for improvement of the source address selection 233 * algorithm: 234 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 235 */ 236 #define IP6S_RULESMAX 16 237 #define IP6S_SCOPECNT 16 238 /* number of times that address selection fails */ 239 uint64_t ip6s_sources_none; 240 /* number of times that an address on the outgoing I/F is chosen */ 241 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 242 /* number of times that an address on a non-outgoing I/F is chosen */ 243 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 244 /* 245 * number of times that an address that has the same scope 246 * from the destination is chosen. 247 */ 248 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 249 /* 250 * number of times that an address that has a different scope 251 * from the destination is chosen. 252 */ 253 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 254 /* number of times that a deprecated address is chosen */ 255 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 256 257 /* number of times that each rule of source selection is applied. */ 258 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 259 }; 260 261 #ifdef _KERNEL 262 #include <sys/counter.h> 263 264 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 265 #define IP6STAT_ADD(name, val) \ 266 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) 267 #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 268 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 269 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 270 #endif 271 272 #ifdef _KERNEL 273 /* flags passed to ip6_output as last parameter */ 274 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 275 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 276 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 277 278 #ifdef __NO_STRICT_ALIGNMENT 279 #define IP6_HDR_ALIGNED_P(ip) 1 280 #else 281 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 282 #endif 283 284 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 285 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 286 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 287 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 288 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 289 * walk list every 5 sec. */ 290 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 291 VNET_DECLARE(int, ip6_v6only); 292 #define V_ip6_defhlim VNET(ip6_defhlim) 293 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 294 #define V_ip6_forwarding VNET(ip6_forwarding) 295 #define V_ip6_use_deprecated VNET(ip6_use_deprecated) 296 #define V_ip6_rr_prune VNET(ip6_rr_prune) 297 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 298 #define V_ip6_v6only VNET(ip6_v6only) 299 300 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 301 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 302 VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly 303 * queue */ 304 extern int ip6_maxfrags; /* Maximum fragments in reassembly 305 * queue */ 306 VNET_DECLARE(int, ip6_maxfragbucketsize); /* Maximum reassembly queues per bucket */ 307 VNET_DECLARE(int, ip6_maxfragsperpacket); /* Maximum fragments per packet */ 308 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 309 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 310 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 311 * receiving IF. */ 312 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 313 forwarding enabled */ 314 VNET_DECLARE(int, ip6_log_interval); 315 VNET_DECLARE(time_t, ip6_log_time); 316 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 317 * headers */ 318 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 319 #define V_ip6_mrouter VNET(ip6_mrouter) 320 #define V_ip6_sendredirects VNET(ip6_sendredirects) 321 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets) 322 #define V_ip6_maxfragbucketsize VNET(ip6_maxfragbucketsize) 323 #define V_ip6_maxfragsperpacket VNET(ip6_maxfragsperpacket) 324 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 325 #define V_ip6_no_radr VNET(ip6_no_radr) 326 #define V_ip6_norbit_raif VNET(ip6_norbit_raif) 327 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 328 #define V_ip6_log_interval VNET(ip6_log_interval) 329 #define V_ip6_log_time VNET(ip6_log_time) 330 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 331 #define V_ip6_dad_count VNET(ip6_dad_count) 332 333 VNET_DECLARE(int, ip6_auto_flowlabel); 334 VNET_DECLARE(int, ip6_auto_linklocal); 335 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 336 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 337 338 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 339 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 340 * addresses in the source address 341 * selection */ 342 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 343 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 344 345 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 346 * zone when unspecified */ 347 #define V_ip6_use_defzone VNET(ip6_use_defzone) 348 349 VNET_DECLARE(struct pfil_head *, inet6_pfil_head); 350 #define V_inet6_pfil_head VNET(inet6_pfil_head) 351 #define PFIL_INET6_NAME "inet6" 352 353 #ifdef IPSTEALTH 354 VNET_DECLARE(int, ip6stealth); 355 #define V_ip6stealth VNET(ip6stealth) 356 #endif 357 358 extern struct pr_usrreqs rip6_usrreqs; 359 struct sockopt; 360 361 struct inpcb; 362 363 int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 364 365 struct in6_ifaddr; 366 void ip6_init(void); 367 int ip6proto_register(short); 368 int ip6proto_unregister(short); 369 370 void ip6_input(struct mbuf *); 371 void ip6_direct_input(struct mbuf *); 372 void ip6_freepcbopts(struct ip6_pktopts *); 373 374 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 375 int ip6_get_prevhdr(const struct mbuf *, int); 376 int ip6_nexthdr(const struct mbuf *, int, int, int *); 377 int ip6_lasthdr(const struct mbuf *, int, int, int *); 378 379 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 380 struct mbuf *); 381 382 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 383 u_int32_t *); 384 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 385 struct mbuf **, int *); 386 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 387 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 388 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 389 390 void ip6_forward(struct mbuf *, int); 391 392 void ip6_mloopback(struct ifnet *, struct mbuf *); 393 int ip6_output(struct mbuf *, struct ip6_pktopts *, 394 struct route_in6 *, 395 int, 396 struct ip6_moptions *, struct ifnet **, 397 struct inpcb *); 398 int ip6_ctloutput(struct socket *, struct sockopt *); 399 int ip6_raw_ctloutput(struct socket *, struct sockopt *); 400 void ip6_initpktopts(struct ip6_pktopts *); 401 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 402 struct ip6_pktopts *, struct ucred *, int); 403 void ip6_clearpktopts(struct ip6_pktopts *, int); 404 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 405 int ip6_optlen(struct inpcb *); 406 int ip6_deletefraghdr(struct mbuf *, int, int); 407 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 408 uint32_t); 409 410 int route6_input(struct mbuf **, int *, int); 411 412 void frag6_set_bucketsize(void); 413 void frag6_init(void); 414 int frag6_input(struct mbuf **, int *, int); 415 void frag6_slowtimo(void); 416 void frag6_drain(void); 417 418 void rip6_init(void); 419 int rip6_input(struct mbuf **, int *, int); 420 void rip6_ctlinput(int, struct sockaddr *, void *); 421 int rip6_ctloutput(struct socket *, struct sockopt *); 422 int rip6_output(struct mbuf *, struct socket *, ...); 423 int rip6_usrreq(struct socket *, 424 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 425 426 int dest6_input(struct mbuf **, int *, int); 427 int none_input(struct mbuf **, int *, int); 428 429 int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 430 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 431 int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 432 uint32_t, struct ifnet *, struct in6_addr *, int *); 433 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 434 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 435 struct rtentry **); 436 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *, 437 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 438 struct rtentry **, u_int); 439 u_int32_t ip6_randomid(void); 440 u_int32_t ip6_randomflowlabel(void); 441 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 442 #endif /* _KERNEL */ 443 444 #endif /* !_NETINET6_IP6_VAR_H_ */ 445