1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ 30 */ 31 32 /*- 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 61 * $FreeBSD$ 62 */ 63 64 #ifndef _NETINET6_IP6_VAR_H_ 65 #define _NETINET6_IP6_VAR_H_ 66 67 /* 68 * IP6 reassembly queue structure. Each fragment 69 * being reassembled is attached to one of these structures. 70 */ 71 struct ip6q { 72 struct ip6asfrag *ip6q_down; 73 struct ip6asfrag *ip6q_up; 74 u_int32_t ip6q_ident; 75 u_int8_t ip6q_nxt; 76 u_int8_t ip6q_ecn; 77 u_int8_t ip6q_ttl; 78 struct in6_addr ip6q_src, ip6q_dst; 79 struct ip6q *ip6q_next; 80 struct ip6q *ip6q_prev; 81 int ip6q_unfrglen; /* len of unfragmentable part */ 82 #ifdef notyet 83 u_char *ip6q_nxtp; 84 #endif 85 int ip6q_nfrag; /* # of fragments */ 86 struct label *ip6q_label; 87 }; 88 89 struct ip6asfrag { 90 struct ip6asfrag *ip6af_down; 91 struct ip6asfrag *ip6af_up; 92 struct mbuf *ip6af_m; 93 int ip6af_offset; /* offset in ip6af_m to next header */ 94 int ip6af_frglen; /* fragmentable part length */ 95 int ip6af_off; /* fragment offset */ 96 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 97 }; 98 99 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 100 101 /* 102 * Structure attached to inpcb.in6p_moptions and 103 * passed to ip6_output when IPv6 multicast options are in use. 104 * This structure is lazy-allocated. 105 */ 106 struct ip6_moptions { 107 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 108 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 109 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 110 u_short im6o_num_memberships; /* no. memberships this socket */ 111 u_short im6o_max_memberships; /* max memberships this socket */ 112 struct in6_multi **im6o_membership; /* group memberships */ 113 struct in6_mfilter *im6o_mfilters; /* source filters */ 114 }; 115 116 /* 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 u_quad_t ip6s_total; /* total packets received */ 185 u_quad_t ip6s_tooshort; /* packet too short */ 186 u_quad_t ip6s_toosmall; /* not enough data */ 187 u_quad_t ip6s_fragments; /* fragments received */ 188 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 189 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 190 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 191 u_quad_t ip6s_forward; /* packets forwarded */ 192 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 193 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 194 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 195 u_quad_t ip6s_localout; /* total ip packets generated here */ 196 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 197 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 198 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 199 u_quad_t ip6s_ofragments; /* output fragments created */ 200 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 201 u_quad_t ip6s_badoptions; /* error in option processing */ 202 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 203 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 204 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 205 u_quad_t ip6s_badscope; /* scope error */ 206 u_quad_t ip6s_notmember; /* don't join this multicast group */ 207 u_quad_t ip6s_nxthist[256]; /* next header history */ 208 u_quad_t ip6s_m1; /* one mbuf */ 209 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 210 u_quad_t ip6s_mext1; /* one ext mbuf */ 211 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 212 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 213 u_quad_t ip6s_nogif; /* no match gif found */ 214 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 215 216 /* 217 * statistics for improvement of the source address selection 218 * algorithm: 219 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 220 */ 221 /* number of times that address selection fails */ 222 u_quad_t ip6s_sources_none; 223 /* number of times that an address on the outgoing I/F is chosen */ 224 u_quad_t ip6s_sources_sameif[16]; 225 /* number of times that an address on a non-outgoing I/F is chosen */ 226 u_quad_t ip6s_sources_otherif[16]; 227 /* 228 * number of times that an address that has the same scope 229 * from the destination is chosen. 230 */ 231 u_quad_t ip6s_sources_samescope[16]; 232 /* 233 * number of times that an address that has a different scope 234 * from the destination is chosen. 235 */ 236 u_quad_t ip6s_sources_otherscope[16]; 237 /* number of times that a deprecated address is chosen */ 238 u_quad_t ip6s_sources_deprecated[16]; 239 240 /* number of times that each rule of source selection is applied. */ 241 u_quad_t ip6s_sources_rule[16]; 242 }; 243 244 #ifdef _KERNEL 245 #define IP6STAT_ADD(name, val) V_ip6stat.name += (val) 246 #define IP6STAT_SUB(name, val) V_ip6stat.name -= (val) 247 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 248 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 249 #endif 250 251 #ifdef _KERNEL 252 /* 253 * IPv6 onion peeling state. 254 * it will be initialized when we come into ip6_input(). 255 * XXX do not make it a kitchen sink! 256 */ 257 struct ip6aux { 258 u_int32_t ip6a_flags; 259 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 260 #define IP6A_HASEEN 0x02 /* HA was present */ 261 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 262 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 263 264 /* ip6.ip6_src */ 265 struct in6_addr ip6a_careof; /* care-of address of the peer */ 266 struct in6_addr ip6a_home; /* home address of the peer */ 267 u_int16_t ip6a_bruid; /* BR unique identifier */ 268 269 /* ip6.ip6_dst */ 270 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 271 272 /* rtalert */ 273 u_int16_t ip6a_rtalert; /* rtalert option value */ 274 275 /* 276 * decapsulation history will be here. 277 * with IPsec it may not be accurate. 278 */ 279 }; 280 #endif 281 282 #ifdef _KERNEL 283 /* flags passed to ip6_output as last parameter */ 284 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 285 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 286 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 287 288 #ifdef __NO_STRICT_ALIGNMENT 289 #define IP6_HDR_ALIGNED_P(ip) 1 290 #else 291 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 292 #endif 293 294 VNET_DECLARE(struct ip6stat, ip6stat); /* statistics */ 295 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 296 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 297 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 298 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 299 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 300 * walk list every 5 sec. */ 301 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 302 VNET_DECLARE(int, ip6_v6only); 303 #define V_ip6stat VNET(ip6stat) 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_maxfragpackets); /* Maximum packets in reassembly 315 * queue */ 316 VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly 317 * queue */ 318 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 319 VNET_DECLARE(int, ip6_keepfaith); /* Firewall Aided Internet Translator */ 320 VNET_DECLARE(int, ip6_log_interval); 321 VNET_DECLARE(time_t, ip6_log_time); 322 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 323 * headers */ 324 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 325 #define V_ip6_mrouter VNET(ip6_mrouter) 326 #define V_ip6_sendredirects VNET(ip6_sendredirects) 327 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets) 328 #define V_ip6_maxfrags VNET(ip6_maxfrags) 329 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 330 #define V_ip6_keepfaith VNET(ip6_keepfaith) 331 #define V_ip6_log_interval VNET(ip6_log_interval) 332 #define V_ip6_log_time VNET(ip6_log_time) 333 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 334 #define V_ip6_dad_count VNET(ip6_dad_count) 335 336 VNET_DECLARE(int, ip6_auto_flowlabel); 337 VNET_DECLARE(int, ip6_auto_linklocal); 338 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 339 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 340 341 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 342 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 343 * addresses in the source address 344 * selection */ 345 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 346 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 347 348 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 349 * zone when unspecified */ 350 #define V_ip6_use_defzone VNET(ip6_use_defzone) 351 352 VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */ 353 #define V_inet6_pfil_hook VNET(inet6_pfil_hook) 354 #ifdef IPSTEALTH 355 VNET_DECLARE(int, ip6stealth); 356 #define V_ip6stealth VNET(ip6stealth) 357 #endif 358 359 extern struct pr_usrreqs rip6_usrreqs; 360 struct sockopt; 361 362 struct inpcb; 363 364 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 365 366 struct in6_ifaddr; 367 void ip6_init __P((void)); 368 #ifdef VIMAGE 369 void ip6_destroy __P((void)); 370 #endif 371 int ip6proto_register(short); 372 int ip6proto_unregister(short); 373 374 void ip6_input __P((struct mbuf *)); 375 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 376 void ip6_freepcbopts __P((struct ip6_pktopts *)); 377 378 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 379 char * ip6_get_prevhdr __P((struct mbuf *, int)); 380 int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 381 int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 382 383 struct ip6aux *ip6_addaux __P((struct mbuf *)); 384 struct ip6aux *ip6_findaux __P((struct mbuf *)); 385 void ip6_delaux __P((struct mbuf *)); 386 387 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 388 struct mbuf *); 389 390 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 391 u_int32_t *)); 392 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 393 struct mbuf **, int *); 394 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 395 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 396 u_int32_t *)); 397 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 398 399 void ip6_forward __P((struct mbuf *, int)); 400 401 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 402 int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 403 struct route_in6 *, 404 int, 405 struct ip6_moptions *, struct ifnet **, 406 struct inpcb *)); 407 int ip6_ctloutput __P((struct socket *, struct sockopt *)); 408 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 409 void ip6_initpktopts __P((struct ip6_pktopts *)); 410 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 411 struct ip6_pktopts *, struct ucred *, int)); 412 void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 413 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 414 int ip6_optlen __P((struct inpcb *)); 415 416 int route6_input __P((struct mbuf **, int *, int)); 417 418 void frag6_init __P((void)); 419 int frag6_input __P((struct mbuf **, int *, int)); 420 void frag6_slowtimo __P((void)); 421 void frag6_drain __P((void)); 422 423 void rip6_init __P((void)); 424 int rip6_input __P((struct mbuf **, int *, int)); 425 void rip6_ctlinput __P((int, struct sockaddr *, void *)); 426 int rip6_ctloutput __P((struct socket *, struct sockopt *)); 427 int rip6_output __P((struct mbuf *, ...)); 428 int rip6_usrreq __P((struct socket *, 429 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 430 431 int dest6_input __P((struct mbuf **, int *, int)); 432 int none_input __P((struct mbuf **, int *, int)); 433 434 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 435 struct inpcb *inp, struct route_in6 *, struct ucred *cred, 436 struct ifnet **, struct in6_addr *); 437 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 438 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 439 struct rtentry **)); 440 u_int32_t ip6_randomid __P((void)); 441 u_int32_t ip6_randomflowlabel __P((void)); 442 #endif /* _KERNEL */ 443 444 #endif /* !_NETINET6_IP6_VAR_H_ */ 445