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: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ 30 * $FreeBSD$ 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 llentry; 45 46 #define ND6_LLINFO_NOSTATE -2 47 /* 48 * We don't need the WAITDELETE state any more, but we keep the definition 49 * in a comment line instead of removing it. This is necessary to avoid 50 * unintentionally reusing the value for another purpose, which might 51 * affect backward compatibility with old applications. 52 * (20000711 jinmei@kame.net) 53 */ 54 /* #define ND6_LLINFO_WAITDELETE -1 */ 55 #define ND6_LLINFO_INCOMPLETE 0 56 #define ND6_LLINFO_REACHABLE 1 57 #define ND6_LLINFO_STALE 2 58 #define ND6_LLINFO_DELAY 3 59 #define ND6_LLINFO_PROBE 4 60 61 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 62 #define ND6_LLINFO_PERMANENT(n) (((n)->la_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) 63 64 struct nd_ifinfo { 65 u_int32_t linkmtu; /* LinkMTU */ 66 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 67 u_int32_t basereachable; /* BaseReachableTime */ 68 u_int32_t reachable; /* Reachable Time */ 69 u_int32_t retrans; /* Retrans Timer */ 70 u_int32_t flags; /* Flags */ 71 int recalctm; /* BaseReacable re-calculation timer */ 72 u_int8_t chlim; /* CurHopLimit */ 73 u_int8_t initialized; /* Flag to see the entry is initialized */ 74 /* the following 3 members are for privacy extension for addrconf */ 75 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 76 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 77 u_int8_t randomid[8]; /* current random ID */ 78 }; 79 80 #define ND6_IFF_PERFORMNUD 0x1 81 #define ND6_IFF_ACCEPT_RTADV 0x2 82 #define ND6_IFF_PREFER_SOURCE 0x4 /* XXX: not related to ND. */ 83 #define ND6_IFF_IFDISABLED 0x8 /* IPv6 operation is disabled due to 84 * DAD failure. (XXX: not ND-specific) 85 */ 86 #define ND6_IFF_DONT_SET_IFROUTE 0x10 87 88 #define ND6_CREATE LLE_CREATE 89 #define ND6_EXCLUSIVE LLE_EXCLUSIVE 90 91 #ifdef _KERNEL 92 #define ND_IFINFO(ifp) \ 93 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 94 #define IN6_LINKMTU(ifp) \ 95 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 96 ? ND_IFINFO(ifp)->linkmtu \ 97 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 98 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 99 #endif 100 101 struct in6_nbrinfo { 102 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 103 struct in6_addr addr; /* IPv6 address of the neighbor */ 104 long asked; /* number of queries already sent for this addr */ 105 int isrouter; /* if it acts as a router */ 106 int state; /* reachability state */ 107 int expire; /* lifetime for NDP state transition */ 108 }; 109 110 #define DRLSTSIZ 10 111 #define PRLSTSIZ 10 112 struct in6_drlist { 113 char ifname[IFNAMSIZ]; 114 struct { 115 struct in6_addr rtaddr; 116 u_char flags; 117 u_short rtlifetime; 118 u_long expire; 119 u_short if_index; 120 } defrouter[DRLSTSIZ]; 121 }; 122 123 struct in6_defrouter { 124 struct sockaddr_in6 rtaddr; 125 u_char flags; 126 u_short rtlifetime; 127 u_long expire; 128 u_short if_index; 129 }; 130 131 #ifdef _KERNEL 132 struct in6_oprlist { 133 char ifname[IFNAMSIZ]; 134 struct { 135 struct in6_addr prefix; 136 struct prf_ra raflags; 137 u_char prefixlen; 138 u_char origin; 139 u_long vltime; 140 u_long pltime; 141 u_long expire; 142 u_short if_index; 143 u_short advrtrs; /* number of advertisement routers */ 144 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 145 } prefix[PRLSTSIZ]; 146 }; 147 #endif 148 149 struct in6_prlist { 150 char ifname[IFNAMSIZ]; 151 struct { 152 struct in6_addr prefix; 153 struct prf_ra raflags; 154 u_char prefixlen; 155 u_char origin; 156 u_int32_t vltime; 157 u_int32_t pltime; 158 time_t expire; 159 u_short if_index; 160 u_short advrtrs; /* number of advertisement routers */ 161 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 162 } prefix[PRLSTSIZ]; 163 }; 164 165 struct in6_prefix { 166 struct sockaddr_in6 prefix; 167 struct prf_ra raflags; 168 u_char prefixlen; 169 u_char origin; 170 u_int32_t vltime; 171 u_int32_t pltime; 172 time_t expire; 173 u_int32_t flags; 174 int refcnt; 175 u_short if_index; 176 u_short advrtrs; /* number of advertisement routers */ 177 /* struct sockaddr_in6 advrtr[] */ 178 }; 179 180 #ifdef _KERNEL 181 struct in6_ondireq { 182 char ifname[IFNAMSIZ]; 183 struct { 184 u_int32_t linkmtu; /* LinkMTU */ 185 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 186 u_int32_t basereachable; /* BaseReachableTime */ 187 u_int32_t reachable; /* Reachable Time */ 188 u_int32_t retrans; /* Retrans Timer */ 189 u_int32_t flags; /* Flags */ 190 int recalctm; /* BaseReacable re-calculation timer */ 191 u_int8_t chlim; /* CurHopLimit */ 192 u_int8_t receivedra; 193 } ndi; 194 }; 195 #endif 196 197 struct in6_ndireq { 198 char ifname[IFNAMSIZ]; 199 struct nd_ifinfo ndi; 200 }; 201 202 struct in6_ndifreq { 203 char ifname[IFNAMSIZ]; 204 u_long ifindex; 205 }; 206 207 /* Prefix status */ 208 #define NDPRF_ONLINK 0x1 209 #define NDPRF_DETACHED 0x2 210 211 /* protocol constants */ 212 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 213 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 214 #define MAX_RTR_SOLICITATIONS 3 215 216 #define ND6_INFINITE_LIFETIME 0xffffffff 217 218 #ifdef _KERNEL 219 /* node constants */ 220 #define MAX_REACHABLE_TIME 3600000 /* msec */ 221 #define REACHABLE_TIME 30000 /* msec */ 222 #define RETRANS_TIMER 1000 /* msec */ 223 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 224 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 225 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 226 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 227 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 228 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 229 #define ND_COMPUTE_RTIME(x) \ 230 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 231 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 232 233 TAILQ_HEAD(nd_drhead, nd_defrouter); 234 struct nd_defrouter { 235 TAILQ_ENTRY(nd_defrouter) dr_entry; 236 struct in6_addr rtaddr; 237 u_char flags; /* flags on RA message */ 238 u_short rtlifetime; 239 u_long expire; 240 struct ifnet *ifp; 241 int installed; /* is installed into kernel routing table */ 242 }; 243 244 struct nd_prefixctl { 245 struct ifnet *ndpr_ifp; 246 247 /* prefix */ 248 struct sockaddr_in6 ndpr_prefix; 249 u_char ndpr_plen; 250 251 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 252 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 253 254 struct prf_ra ndpr_flags; 255 }; 256 257 258 struct nd_prefix { 259 struct ifnet *ndpr_ifp; 260 LIST_ENTRY(nd_prefix) ndpr_entry; 261 struct sockaddr_in6 ndpr_prefix; /* prefix */ 262 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 263 264 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 265 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 266 267 time_t ndpr_expire; /* expiration time of the prefix */ 268 time_t ndpr_preferred; /* preferred time of the prefix */ 269 time_t ndpr_lastupdate; /* reception time of last advertisement */ 270 271 struct prf_ra ndpr_flags; 272 u_int32_t ndpr_stateflags; /* actual state flags */ 273 /* list of routers that advertise the prefix: */ 274 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 275 u_char ndpr_plen; 276 int ndpr_refcnt; /* reference couter from addresses */ 277 }; 278 279 #define ndpr_next ndpr_entry.le_next 280 281 #define ndpr_raf ndpr_flags 282 #define ndpr_raf_onlink ndpr_flags.onlink 283 #define ndpr_raf_auto ndpr_flags.autonomous 284 #define ndpr_raf_router ndpr_flags.router 285 286 /* 287 * Message format for use in obtaining information about prefixes 288 * from inet6 sysctl function 289 */ 290 struct inet6_ndpr_msghdr { 291 u_short inpm_msglen; /* to skip over non-understood messages */ 292 u_char inpm_version; /* future binary compatibility */ 293 u_char inpm_type; /* message type */ 294 struct in6_addr inpm_prefix; 295 u_long prm_vltim; 296 u_long prm_pltime; 297 u_long prm_expire; 298 u_long prm_preferred; 299 struct in6_prflags prm_flags; 300 u_short prm_index; /* index for associated ifp */ 301 u_char prm_plen; /* length of prefix in bits */ 302 }; 303 304 #define prm_raf_onlink prm_flags.prf_ra.onlink 305 #define prm_raf_auto prm_flags.prf_ra.autonomous 306 307 #define prm_statef_onlink prm_flags.prf_state.onlink 308 309 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 310 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 311 312 struct nd_pfxrouter { 313 LIST_ENTRY(nd_pfxrouter) pfr_entry; 314 #define pfr_next pfr_entry.le_next 315 struct nd_defrouter *router; 316 }; 317 318 LIST_HEAD(nd_prhead, nd_prefix); 319 320 /* nd6.c */ 321 VNET_DECLARE(int, nd6_prune); 322 VNET_DECLARE(int, nd6_delay); 323 VNET_DECLARE(int, nd6_umaxtries); 324 VNET_DECLARE(int, nd6_mmaxtries); 325 VNET_DECLARE(int, nd6_useloopback); 326 VNET_DECLARE(int, nd6_maxnudhint); 327 VNET_DECLARE(int, nd6_gctimer); 328 VNET_DECLARE(struct nd_drhead, nd_defrouter); 329 VNET_DECLARE(struct nd_prhead, nd_prefix); 330 VNET_DECLARE(int, nd6_debug); 331 VNET_DECLARE(int, nd6_onlink_ns_rfc4861); 332 VNET_DECLARE(struct callout, nd6_timer_ch); 333 334 #define V_nd6_prune VNET(nd6_prune) 335 #define V_nd6_delay VNET(nd6_delay) 336 #define V_nd6_umaxtries VNET(nd6_umaxtries) 337 #define V_nd6_mmaxtries VNET(nd6_mmaxtries) 338 #define V_nd6_useloopback VNET(nd6_useloopback) 339 #define V_nd6_maxnudhint VNET(nd6_maxnudhint) 340 #define V_nd6_gctimer VNET(nd6_gctimer) 341 #define V_nd_defrouter VNET(nd_defrouter) 342 #define V_nd_prefix VNET(nd_prefix) 343 #define V_nd6_debug VNET(nd6_debug) 344 #define V_nd6_onlink_ns_rfc4861 VNET(nd6_onlink_ns_rfc4861) 345 #define V_nd6_timer_ch VNET(nd6_timer_ch) 346 347 /* nd6_rtr.c */ 348 VNET_DECLARE(int, nd6_defifindex); 349 VNET_DECLARE(int, ip6_desync_factor); /* seconds */ 350 VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */ 351 VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */ 352 VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */ 353 354 #define V_nd6_defifindex VNET(nd6_defifindex) 355 #define V_ip6_desync_factor VNET(ip6_desync_factor) 356 #define V_ip6_temp_preferred_lifetime VNET(ip6_temp_preferred_lifetime) 357 #define V_ip6_temp_valid_lifetime VNET(ip6_temp_valid_lifetime) 358 #define V_ip6_temp_regen_advance VNET(ip6_temp_regen_advance) 359 360 #define nd6log(x) do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0) 361 362 union nd_opts { 363 struct nd_opt_hdr *nd_opt_array[8]; /* max = target address list */ 364 struct { 365 struct nd_opt_hdr *zero; 366 struct nd_opt_hdr *src_lladdr; 367 struct nd_opt_hdr *tgt_lladdr; 368 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 369 struct nd_opt_rd_hdr *rh; 370 struct nd_opt_mtu *mtu; 371 struct nd_opt_hdr *search; /* multiple opts */ 372 struct nd_opt_hdr *last; /* multiple opts */ 373 int done; 374 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 375 } nd_opt_each; 376 }; 377 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 378 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 379 #define nd_opts_pi nd_opt_each.pi_beg 380 #define nd_opts_pi_end nd_opt_each.pi_end 381 #define nd_opts_rh nd_opt_each.rh 382 #define nd_opts_mtu nd_opt_each.mtu 383 #define nd_opts_search nd_opt_each.search 384 #define nd_opts_last nd_opt_each.last 385 #define nd_opts_done nd_opt_each.done 386 387 /* XXX: need nd6_var.h?? */ 388 /* nd6.c */ 389 void nd6_init __P((void)); 390 #ifdef VIMAGE 391 void nd6_destroy __P((void)); 392 #endif 393 struct nd_ifinfo *nd6_ifattach __P((struct ifnet *)); 394 void nd6_ifdetach __P((struct nd_ifinfo *)); 395 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); 396 void nd6_option_init __P((void *, int, union nd_opts *)); 397 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 398 int nd6_options __P((union nd_opts *)); 399 struct llentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 400 void nd6_setmtu __P((struct ifnet *)); 401 void nd6_llinfo_settimer __P((struct llentry *, long)); 402 void nd6_llinfo_settimer_locked __P((struct llentry *, long)); 403 void nd6_timer __P((void *)); 404 void nd6_purge __P((struct ifnet *)); 405 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); 406 int nd6_resolve __P((struct ifnet *, struct rtentry *, struct mbuf *, 407 struct sockaddr *, u_char *)); 408 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 409 struct llentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 410 char *, int, int, int)); 411 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, 412 struct sockaddr_in6 *, struct rtentry *)); 413 int nd6_output_lle __P((struct ifnet *, struct ifnet *, struct mbuf *, 414 struct sockaddr_in6 *, struct rtentry *, struct llentry *, 415 struct mbuf **)); 416 int nd6_output_flush __P((struct ifnet *, struct ifnet *, struct mbuf *, 417 struct sockaddr_in6 *, struct route *)); 418 int nd6_need_cache __P((struct ifnet *)); 419 int nd6_storelladdr __P((struct ifnet *, struct mbuf *, 420 struct sockaddr *, u_char *, struct llentry **)); 421 422 /* nd6_nbr.c */ 423 void nd6_na_input __P((struct mbuf *, int, int)); 424 void nd6_na_output __P((struct ifnet *, const struct in6_addr *, 425 const struct in6_addr *, u_long, int, struct sockaddr *)); 426 void nd6_ns_input __P((struct mbuf *, int, int)); 427 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *, 428 const struct in6_addr *, struct llentry *, int)); 429 caddr_t nd6_ifptomac __P((struct ifnet *)); 430 void nd6_dad_start __P((struct ifaddr *, int)); 431 void nd6_dad_stop __P((struct ifaddr *)); 432 void nd6_dad_duplicated __P((struct ifaddr *)); 433 434 /* nd6_rtr.c */ 435 void nd6_rs_input __P((struct mbuf *, int, int)); 436 void nd6_ra_input __P((struct mbuf *, int, int)); 437 void prelist_del __P((struct nd_prefix *)); 438 void defrouter_addreq __P((struct nd_defrouter *)); 439 void defrouter_reset __P((void)); 440 void defrouter_select __P((void)); 441 void defrtrlist_del __P((struct nd_defrouter *)); 442 void prelist_remove __P((struct nd_prefix *)); 443 int nd6_prelist_add __P((struct nd_prefixctl *, struct nd_defrouter *, 444 struct nd_prefix **)); 445 int nd6_prefix_onlink __P((struct nd_prefix *)); 446 int nd6_prefix_offlink __P((struct nd_prefix *)); 447 void pfxlist_onlink_check __P((void)); 448 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, struct ifnet *)); 449 struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefixctl *)); 450 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 451 int nd6_setdefaultiface __P((int)); 452 int in6_tmpifadd __P((const struct in6_ifaddr *, int, int)); 453 454 #endif /* _KERNEL */ 455 456 #endif /* _NETINET6_ND6_H_ */ 457