nd6.h revision 1.54
1 /* $NetBSD: nd6.h,v 1.54 2011/05/24 18:07:11 spz Exp $ */ 2 /* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef _NETINET6_ND6_H_ 34 #define _NETINET6_ND6_H_ 35 36 /* see net/route.h, or net/if_inarp.h */ 37 #ifndef RTF_ANNOUNCE 38 #define RTF_ANNOUNCE RTF_PROTO2 39 #endif 40 41 #include <sys/queue.h> 42 #include <sys/callout.h> 43 44 struct llinfo_nd6 { 45 struct llinfo_nd6 *ln_next; 46 struct llinfo_nd6 *ln_prev; 47 struct rtentry *ln_rt; 48 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 49 long ln_asked; /* number of queries already sent for this addr */ 50 u_long ln_expire; /* lifetime for NDP state transition */ 51 short ln_state; /* reachability state */ 52 short ln_router; /* 2^0: ND6 router bit */ 53 int ln_byhint; /* # of times we made it reachable by UL hint */ 54 55 long ln_ntick; 56 struct callout ln_timer_ch; 57 }; 58 59 #define ND6_LLINFO_NOSTATE -2 60 /* 61 * We don't need the WAITDELETE state any more, but we keep the definition 62 * in a comment line instead of removing it. This is necessary to avoid 63 * unintentionally reusing the value for another purpose, which might 64 * affect backward compatibility with old applications. 65 * (20000711 jinmei (at) kame.net) 66 */ 67 /* #define ND6_LLINFO_WAITDELETE -1 */ 68 #define ND6_LLINFO_INCOMPLETE 0 69 #define ND6_LLINFO_REACHABLE 1 70 #define ND6_LLINFO_STALE 2 71 #define ND6_LLINFO_DELAY 3 72 #define ND6_LLINFO_PROBE 4 73 74 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 75 #define ND6_LLINFO_PERMANENT(n) (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) 76 77 struct nd_ifinfo { 78 u_int32_t linkmtu; /* LinkMTU */ 79 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 80 u_int32_t basereachable; /* BaseReachableTime */ 81 u_int32_t reachable; /* Reachable Time */ 82 u_int32_t retrans; /* Retrans Timer */ 83 u_int32_t flags; /* Flags */ 84 int recalctm; /* BaseReacable re-calculation timer */ 85 u_int8_t chlim; /* CurHopLimit */ 86 u_int8_t initialized; /* Flag to see the entry is initialized */ 87 /* the following 3 members are for privacy extension for addrconf */ 88 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 89 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 90 u_int8_t randomid[8]; /* current random ID */ 91 }; 92 93 #define ND6_IFF_PERFORMNUD 0x01 94 #define ND6_IFF_ACCEPT_RTADV 0x02 /* See "RTADV Key", below. */ 95 #define ND6_IFF_PREFER_SOURCE 0x04 /* XXX: not related to ND. */ 96 #define ND6_IFF_IFDISABLED 0x08 /* IPv6 operation is disabled due to 97 * DAD failure. (XXX: not ND-specific) 98 */ 99 #define ND6_IFF_OVERRIDE_RTADV 0x10 /* See "RTADV Key", below. */ 100 101 /* 102 * RTADV Key 103 * 104 * The flags ND6_IFF_ACCEPT_RTADV and ND6_IFF_OVERRIDE_RTADV form a 105 * tri-state variable. (There are actually four different states, but 106 * two of the states are functionally identical.) 107 * 108 * ND6_IFF_OVERRIDE_RTADV or 0: This interface does not accept 109 * Router Advertisements. 110 * 111 * ND6_IFF_OVERRIDE_RTADV| 112 * ND6_IFF_ACCEPT_RTADV: This interface accepts Router 113 * Advertisements regardless of the 114 * global setting, ip6_accept_rtadv. 115 * 116 * ND6_IFF_ACCEPT_RTADV: This interface follows the global setting, 117 * ip6_accept_rtadv. If ip6_accept_rtadv == 0, 118 * this interface does not accept Router 119 * Advertisements. If ip6_accept_rtadv != 0, 120 * this interface does accept them. 121 */ 122 123 #ifdef _KERNEL 124 #define ND_IFINFO(ifp) \ 125 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 126 #define IN6_LINKMTU(ifp) \ 127 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 128 ? ND_IFINFO(ifp)->linkmtu \ 129 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 130 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 131 #endif 132 133 struct in6_nbrinfo { 134 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 135 struct in6_addr addr; /* IPv6 address of the neighbor */ 136 long asked; /* number of queries already sent for this addr */ 137 int isrouter; /* if it acts as a router */ 138 int state; /* reachability state */ 139 int expire; /* lifetime for NDP state transition */ 140 }; 141 142 #define DRLSTSIZ 10 143 #define PRLSTSIZ 10 144 struct in6_drlist { 145 char ifname[IFNAMSIZ]; 146 struct { 147 struct in6_addr rtaddr; 148 u_char flags; 149 u_short rtlifetime; 150 u_long expire; 151 u_short if_index; 152 } defrouter[DRLSTSIZ]; 153 }; 154 155 struct in6_defrouter { 156 struct sockaddr_in6 rtaddr; 157 u_char flags; 158 u_short rtlifetime; 159 u_long expire; 160 u_short if_index; 161 }; 162 163 #ifdef _KERNEL 164 struct in6_oprlist { 165 char ifname[IFNAMSIZ]; 166 struct { 167 struct in6_addr prefix; 168 struct prf_ra raflags; 169 u_char prefixlen; 170 u_char origin; 171 u_long vltime; 172 u_long pltime; 173 u_long expire; 174 u_short if_index; 175 u_short advrtrs; /* number of advertisement routers */ 176 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 177 } prefix[PRLSTSIZ]; 178 }; 179 #endif 180 181 struct in6_prlist { 182 char ifname[IFNAMSIZ]; 183 struct { 184 struct in6_addr prefix; 185 struct prf_ra raflags; 186 u_char prefixlen; 187 u_char origin; 188 u_int32_t vltime; 189 u_int32_t pltime; 190 time_t expire; 191 u_short if_index; 192 u_short advrtrs; /* number of advertisement routers */ 193 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 194 } prefix[PRLSTSIZ]; 195 }; 196 197 struct in6_prefix { 198 struct sockaddr_in6 prefix; 199 struct prf_ra raflags; 200 u_char prefixlen; 201 u_char origin; 202 u_int32_t vltime; 203 u_int32_t pltime; 204 time_t expire; 205 u_int32_t flags; 206 int refcnt; 207 u_short if_index; 208 u_short advrtrs; /* number of advertisement routers */ 209 /* struct sockaddr_in6 advrtr[] */ 210 }; 211 212 #ifdef _KERNEL 213 struct in6_ondireq { 214 char ifname[IFNAMSIZ]; 215 struct { 216 u_int32_t linkmtu; /* LinkMTU */ 217 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 218 u_int32_t basereachable; /* BaseReachableTime */ 219 u_int32_t reachable; /* Reachable Time */ 220 u_int32_t retrans; /* Retrans Timer */ 221 u_int32_t flags; /* Flags */ 222 int recalctm; /* BaseReacable re-calculation timer */ 223 u_int8_t chlim; /* CurHopLimit */ 224 u_int8_t receivedra; 225 } ndi; 226 }; 227 #endif 228 229 struct in6_ndireq { 230 char ifname[IFNAMSIZ]; 231 struct nd_ifinfo ndi; 232 }; 233 234 struct in6_ndifreq { 235 char ifname[IFNAMSIZ]; 236 u_long ifindex; 237 }; 238 239 /* Prefix status */ 240 #define NDPRF_ONLINK 0x1 241 #define NDPRF_DETACHED 0x2 242 #define NDPRF_HOME 0x4 243 244 /* protocol constants */ 245 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 246 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 247 #define MAX_RTR_SOLICITATIONS 3 248 249 #define ND6_INFINITE_LIFETIME ((u_int32_t)~0) 250 251 #ifdef _KERNEL 252 /* node constants */ 253 #define MAX_REACHABLE_TIME 3600000 /* msec */ 254 #define REACHABLE_TIME 30000 /* msec */ 255 #define RETRANS_TIMER 1000 /* msec */ 256 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 257 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 258 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 259 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 260 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 261 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 262 #define ND_COMPUTE_RTIME(x) \ 263 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 264 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 265 266 TAILQ_HEAD(nd_drhead, nd_defrouter); 267 struct nd_defrouter { 268 TAILQ_ENTRY(nd_defrouter) dr_entry; 269 struct in6_addr rtaddr; 270 u_char flags; /* flags on RA message */ 271 u_short rtlifetime; 272 u_long expire; 273 struct ifnet *ifp; 274 int installed; /* is installed into kernel routing table */ 275 }; 276 277 struct nd_prefixctl { 278 struct ifnet *ndpr_ifp; 279 280 /* prefix */ 281 struct sockaddr_in6 ndpr_prefix; 282 u_char ndpr_plen; 283 284 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 285 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 286 287 struct prf_ra ndpr_flags; 288 }; 289 290 struct nd_prefix { 291 struct ifnet *ndpr_ifp; 292 LIST_ENTRY(nd_prefix) ndpr_entry; 293 struct sockaddr_in6 ndpr_prefix; /* prefix */ 294 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 295 296 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 297 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 298 299 time_t ndpr_expire; /* expiration time of the prefix */ 300 time_t ndpr_preferred; /* preferred time of the prefix */ 301 time_t ndpr_lastupdate; /* reception time of last advertisement */ 302 303 struct prf_ra ndpr_flags; 304 u_int32_t ndpr_stateflags; /* actual state flags */ 305 /* list of routers that advertise the prefix: */ 306 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 307 u_char ndpr_plen; 308 int ndpr_refcnt; /* reference couter from addresses */ 309 }; 310 311 #define ndpr_raf ndpr_flags 312 #define ndpr_raf_onlink ndpr_flags.onlink 313 #define ndpr_raf_auto ndpr_flags.autonomous 314 #define ndpr_raf_router ndpr_flags.router 315 316 /* 317 * Message format for use in obtaining information about prefixes 318 * from inet6 sysctl function 319 */ 320 struct inet6_ndpr_msghdr { 321 u_short inpm_msglen; /* to skip over non-understood messages */ 322 u_char inpm_version; /* future binary compatibility */ 323 u_char inpm_type; /* message type */ 324 struct in6_addr inpm_prefix; 325 u_long prm_vltim; 326 u_long prm_pltime; 327 u_long prm_expire; 328 u_long prm_preferred; 329 struct in6_prflags prm_flags; 330 u_short prm_index; /* index for associated ifp */ 331 u_char prm_plen; /* length of prefix in bits */ 332 }; 333 334 #define prm_raf_onlink prm_flags.prf_ra.onlink 335 #define prm_raf_auto prm_flags.prf_ra.autonomous 336 337 #define prm_statef_onlink prm_flags.prf_state.onlink 338 339 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 340 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 341 342 struct nd_pfxrouter { 343 LIST_ENTRY(nd_pfxrouter) pfr_entry; 344 struct nd_defrouter *router; 345 }; 346 347 LIST_HEAD(nd_prhead, nd_prefix); 348 349 #include <sys/mallocvar.h> 350 MALLOC_DECLARE(M_IP6NDP); 351 352 /* nd6.c */ 353 extern int nd6_prune; 354 extern int nd6_delay; 355 extern int nd6_umaxtries; 356 extern int nd6_mmaxtries; 357 extern int nd6_useloopback; 358 extern int nd6_maxnudhint; 359 extern int nd6_gctimer; 360 extern struct llinfo_nd6 llinfo_nd6; 361 extern struct nd_drhead nd_defrouter; 362 extern struct nd_prhead nd_prefix; 363 extern int nd6_debug; 364 365 #define nd6log(x) do { if (nd6_debug) log x; } while (/*CONSTCOND*/ 0) 366 367 extern struct callout nd6_timer_ch; 368 369 /* nd6_rtr.c */ 370 extern int nd6_defifindex; 371 extern int ip6_desync_factor; /* seconds */ 372 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 373 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 374 extern int ip6_temp_regen_advance; /* seconds */ 375 extern int nd6_numroutes; 376 377 union nd_opts { 378 struct nd_opt_hdr *nd_opt_array[8]; 379 struct { 380 struct nd_opt_hdr *zero; 381 struct nd_opt_hdr *src_lladdr; 382 struct nd_opt_hdr *tgt_lladdr; 383 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 384 struct nd_opt_rd_hdr *rh; 385 struct nd_opt_mtu *mtu; 386 struct nd_opt_hdr *search; /* multiple opts */ 387 struct nd_opt_hdr *last; /* multiple opts */ 388 int done; 389 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 390 } nd_opt_each; 391 }; 392 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 393 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 394 #define nd_opts_pi nd_opt_each.pi_beg 395 #define nd_opts_pi_end nd_opt_each.pi_end 396 #define nd_opts_rh nd_opt_each.rh 397 #define nd_opts_mtu nd_opt_each.mtu 398 #define nd_opts_search nd_opt_each.search 399 #define nd_opts_last nd_opt_each.last 400 #define nd_opts_done nd_opt_each.done 401 402 /* XXX: need nd6_var.h?? */ 403 /* nd6.c */ 404 void nd6_init(void); 405 struct nd_ifinfo *nd6_ifattach(struct ifnet *); 406 void nd6_ifdetach(struct nd_ifinfo *); 407 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *); 408 void nd6_option_init(void *, int, union nd_opts *); 409 struct nd_opt_hdr *nd6_option(union nd_opts *); 410 int nd6_options(union nd_opts *); 411 struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *); 412 void nd6_setmtu(struct ifnet *); 413 void nd6_llinfo_settimer(struct llinfo_nd6 *, long); 414 void nd6_timer(void *); 415 void nd6_purge(struct ifnet *); 416 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); 417 int nd6_resolve(struct ifnet *, struct rtentry *, 418 struct mbuf *, struct sockaddr *, u_char *); 419 void nd6_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 420 int nd6_ioctl(u_long, void *, struct ifnet *); 421 struct rtentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 422 char *, int, int, int); 423 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 424 const struct sockaddr_in6 *, struct rtentry *); 425 int nd6_storelladdr(const struct ifnet *, const struct rtentry *, struct mbuf *, 426 const struct sockaddr *, uint8_t *, size_t); 427 int nd6_sysctl(int, void *, size_t *, void *, size_t); 428 int nd6_need_cache(struct ifnet *); 429 void nd6_llinfo_release_pkts(struct llinfo_nd6 *, struct ifnet *, 430 struct rtentry *); 431 432 /* nd6_nbr.c */ 433 void nd6_na_input(struct mbuf *, int, int); 434 void nd6_na_output(struct ifnet *, const struct in6_addr *, 435 const struct in6_addr *, u_long, int, const struct sockaddr *); 436 void nd6_ns_input(struct mbuf *, int, int); 437 void nd6_ns_output(struct ifnet *, const struct in6_addr *, 438 const struct in6_addr *, struct llinfo_nd6 *, int); 439 const void *nd6_ifptomac(const struct ifnet *); 440 void nd6_dad_start(struct ifaddr *, int); 441 void nd6_dad_stop(struct ifaddr *); 442 void nd6_dad_duplicated(struct ifaddr *); 443 444 /* nd6_rtr.c */ 445 void nd6_rs_input(struct mbuf *, int, int); 446 void nd6_ra_input(struct mbuf *, int, int); 447 void prelist_del(struct nd_prefix *); 448 void defrouter_addreq(struct nd_defrouter *); 449 void defrouter_reset(void); 450 void defrouter_select(void); 451 void defrtrlist_del(struct nd_defrouter *); 452 void prelist_remove(struct nd_prefix *); 453 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *, 454 struct nd_prefix **); 455 int nd6_prefix_onlink(struct nd_prefix *); 456 int nd6_prefix_offlink(struct nd_prefix *); 457 void pfxlist_onlink_check(void); 458 struct nd_defrouter *defrouter_lookup(const struct in6_addr *, struct ifnet *); 459 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *); 460 int in6_ifdel(struct ifnet *, struct in6_addr *); 461 void rt6_flush(struct in6_addr *, struct ifnet *); 462 int nd6_setdefaultiface(int); 463 int in6_tmpifadd(const struct in6_ifaddr *, int, int); 464 bool nd6_accepts_rtadv(const struct nd_ifinfo *); 465 466 #endif /* _KERNEL */ 467 468 #endif /* !_NETINET6_ND6_H_ */ 469
Indexes created Fri Sep 26 08:10:20 GMT 2025