1 /* $FreeBSD: src/sys/netinet6/nd6.h,v 1.2.2.5 2002/04/28 05:40:27 suz Exp $ */ 2 /* $DragonFly: src/sys/netinet6/nd6.h,v 1.5 2004/12/30 02:26:12 hsu Exp $ */ 3 /* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef _NETINET6_ND6_H_ 35 #define _NETINET6_ND6_H_ 36 37 /* see net/route.h, or net/if_inarp.h */ 38 #ifndef RTF_ANNOUNCE 39 #define RTF_ANNOUNCE RTF_PROTO2 40 #endif 41 42 #include <sys/queue.h> 43 #include <sys/callout.h> 44 45 struct llinfo_nd6 { 46 struct llinfo_nd6 *ln_next; 47 struct llinfo_nd6 *ln_prev; 48 struct rtentry *ln_rt; 49 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 50 long ln_asked; /* number of queries already sent for this addr */ 51 u_long ln_expire; /* lifetime for NDP state transition */ 52 short ln_state; /* reachability state */ 53 short ln_router; /* 2^0: ND6 router bit */ 54 int ln_byhint; /* # of times we made it reachable by UL hint */ 55 }; 56 57 #define ND6_LLINFO_NOSTATE -2 58 /* 59 * We don't need the WAITDELETE state any more, but we keep the definition 60 * in a comment line instead of removing it. This is necessary to avoid 61 * unintentionally reusing the value for another purpose, which might 62 * affect backward compatibility with old applications. 63 * (20000711 jinmei@kame.net) 64 */ 65 /* #define ND6_LLINFO_WAITDELETE -1 */ 66 #define ND6_LLINFO_INCOMPLETE 0 67 #define ND6_LLINFO_REACHABLE 1 68 #define ND6_LLINFO_STALE 2 69 #define ND6_LLINFO_DELAY 3 70 #define ND6_LLINFO_PROBE 4 71 72 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 73 74 struct nd_ifinfo { 75 u_int32_t linkmtu; /* LinkMTU */ 76 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 77 u_int32_t basereachable; /* BaseReachableTime */ 78 u_int32_t reachable; /* Reachable Time */ 79 u_int32_t retrans; /* Retrans Timer */ 80 u_int32_t flags; /* Flags */ 81 int recalctm; /* BaseReacable re-calculation timer */ 82 u_int8_t chlim; /* CurHopLimit */ 83 u_int8_t receivedra; 84 /* the following 3 members are for privacy extension for addrconf */ 85 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 86 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 87 u_int8_t randomid[8]; /* current random ID */ 88 }; 89 90 #define ND6_IFF_PERFORMNUD 0x1 91 #define ND6_IFF_ACCEPT_RTADV 0x2 92 93 struct in6_nbrinfo { 94 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 95 struct in6_addr addr; /* IPv6 address of the neighbor */ 96 long asked; /* number of queries already sent for this addr */ 97 int isrouter; /* if it acts as a router */ 98 int state; /* reachability state */ 99 int expire; /* lifetime for NDP state transition */ 100 }; 101 102 #define DRLSTSIZ 10 103 #define PRLSTSIZ 10 104 struct in6_drlist { 105 char ifname[IFNAMSIZ]; 106 struct { 107 struct in6_addr rtaddr; 108 u_char flags; 109 u_short rtlifetime; 110 u_long expire; 111 u_short if_index; 112 } defrouter[DRLSTSIZ]; 113 }; 114 115 struct in6_defrouter { 116 struct sockaddr_in6 rtaddr; 117 u_char flags; 118 u_short rtlifetime; 119 u_long expire; 120 u_short if_index; 121 }; 122 123 struct in6_prlist { 124 char ifname[IFNAMSIZ]; 125 struct { 126 struct in6_addr prefix; 127 struct prf_ra raflags; 128 u_char prefixlen; 129 u_char origin; 130 u_int32_t vltime; 131 u_int32_t pltime; 132 time_t expire; 133 u_short if_index; 134 u_short advrtrs; /* number of advertisement routers */ 135 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 136 } prefix[PRLSTSIZ]; 137 }; 138 139 struct in6_prefix { 140 struct sockaddr_in6 prefix; 141 struct prf_ra raflags; 142 u_char prefixlen; 143 u_char origin; 144 u_long vltime; 145 u_long pltime; 146 u_long expire; 147 u_int32_t flags; 148 int refcnt; 149 u_short if_index; 150 u_short advrtrs; /* number of advertisement routers */ 151 /* struct sockaddr_in6 advrtr[] */ 152 }; 153 154 #ifdef _KERNEL 155 struct in6_ondireq { 156 char ifname[IFNAMSIZ]; 157 struct { 158 u_int32_t linkmtu; /* LinkMTU */ 159 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 160 u_int32_t basereachable; /* BaseReachableTime */ 161 u_int32_t reachable; /* Reachable Time */ 162 u_int32_t retrans; /* Retrans Timer */ 163 u_int32_t flags; /* Flags */ 164 int recalctm; /* BaseReacable re-calculation timer */ 165 u_int8_t chlim; /* CurHopLimit */ 166 u_int8_t receivedra; 167 } ndi; 168 }; 169 #endif 170 171 struct in6_ndireq { 172 char ifname[IFNAMSIZ]; 173 struct nd_ifinfo ndi; 174 }; 175 176 struct in6_ndifreq { 177 char ifname[IFNAMSIZ]; 178 u_long ifindex; 179 }; 180 181 /* Prefix status */ 182 #define NDPRF_ONLINK 0x1 183 #define NDPRF_DETACHED 0x2 184 185 /* protocol constants */ 186 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 187 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 188 #define MAX_RTR_SOLICITATIONS 3 189 190 #define ND6_INFINITE_LIFETIME 0xffffffff 191 192 #ifdef _KERNEL 193 /* node constants */ 194 #define MAX_REACHABLE_TIME 3600000 /* msec */ 195 #define REACHABLE_TIME 30000 /* msec */ 196 #define RETRANS_TIMER 1000 /* msec */ 197 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 198 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 199 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 200 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 201 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 202 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 203 #define ND_COMPUTE_RTIME(x) \ 204 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 205 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 206 207 TAILQ_HEAD(nd_drhead, nd_defrouter); 208 struct nd_defrouter { 209 TAILQ_ENTRY(nd_defrouter) dr_entry; 210 struct in6_addr rtaddr; 211 u_char flags; /* flags on RA message */ 212 u_short rtlifetime; 213 u_long expire; 214 u_long advint; /* Mobile IPv6 addition (milliseconds) */ 215 u_long advint_expire; /* Mobile IPv6 addition */ 216 int advints_lost; /* Mobile IPv6 addition */ 217 struct ifnet *ifp; 218 }; 219 220 struct nd_prefix { 221 struct ifnet *ndpr_ifp; 222 LIST_ENTRY(nd_prefix) ndpr_entry; 223 struct sockaddr_in6 ndpr_prefix; /* prefix */ 224 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 225 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 226 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 227 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 228 time_t ndpr_expire; /* expiration time of the prefix */ 229 time_t ndpr_preferred; /* preferred time of the prefix */ 230 struct prf_ra ndpr_flags; 231 u_int32_t ndpr_stateflags; /* actual state flags */ 232 /* list of routers that advertise the prefix: */ 233 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 234 u_char ndpr_plen; 235 int ndpr_refcnt; /* reference couter from addresses */ 236 }; 237 238 #define ndpr_next ndpr_entry.le_next 239 240 #define ndpr_raf ndpr_flags 241 #define ndpr_raf_onlink ndpr_flags.onlink 242 #define ndpr_raf_auto ndpr_flags.autonomous 243 244 /* 245 * We keep expired prefix for certain amount of time, for validation purposes. 246 * 1800s = MaxRtrAdvInterval 247 */ 248 #define NDPR_KEEP_EXPIRED (1800 * 2) 249 250 /* 251 * Message format for use in obtaining information about prefixes 252 * from inet6 sysctl function 253 */ 254 struct inet6_ndpr_msghdr { 255 u_short inpm_msglen; /* to skip over non-understood messages */ 256 u_char inpm_version; /* future binary compatibility */ 257 u_char inpm_type; /* message type */ 258 struct in6_addr inpm_prefix; 259 u_long prm_vltim; 260 u_long prm_pltime; 261 u_long prm_expire; 262 u_long prm_preferred; 263 struct in6_prflags prm_flags; 264 u_short prm_index; /* index for associated ifp */ 265 u_char prm_plen; /* length of prefix in bits */ 266 }; 267 268 #define prm_raf_onlink prm_flags.prf_ra.onlink 269 #define prm_raf_auto prm_flags.prf_ra.autonomous 270 271 #define prm_statef_onlink prm_flags.prf_state.onlink 272 273 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 274 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 275 276 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 277 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 278 279 struct nd_pfxrouter { 280 LIST_ENTRY(nd_pfxrouter) pfr_entry; 281 #define pfr_next pfr_entry.le_next 282 struct nd_defrouter *router; 283 }; 284 285 LIST_HEAD(nd_prhead, nd_prefix); 286 287 /* nd6.c */ 288 extern int nd6_prune; 289 extern int nd6_delay; 290 extern int nd6_umaxtries; 291 extern int nd6_mmaxtries; 292 extern int nd6_useloopback; 293 extern int nd6_maxnudhint; 294 extern int nd6_gctimer; 295 extern struct llinfo_nd6 llinfo_nd6; 296 extern struct nd_ifinfo *nd_ifinfo; 297 extern struct nd_drhead nd_defrouter; 298 extern struct nd_prhead nd_prefix; 299 extern int nd6_debug; 300 301 #define nd6log(x) do { if (nd6_debug) log x; } while (0) 302 303 extern struct callout nd6_timer_ch; 304 305 /* nd6_rtr.c */ 306 extern int nd6_defifindex; 307 extern int ip6_desync_factor; /* seconds */ 308 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 309 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 310 extern int ip6_temp_regen_advance; /* seconds */ 311 312 union nd_opts { 313 struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */ 314 struct { 315 struct nd_opt_hdr *zero; 316 struct nd_opt_hdr *src_lladdr; 317 struct nd_opt_hdr *tgt_lladdr; 318 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 319 struct nd_opt_rd_hdr *rh; 320 struct nd_opt_mtu *mtu; 321 struct nd_opt_hdr *six; 322 struct nd_opt_advint *adv; 323 struct nd_opt_hai *hai; 324 struct nd_opt_hdr *search; /* multiple opts */ 325 struct nd_opt_hdr *last; /* multiple opts */ 326 int done; 327 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 328 } nd_opt_each; 329 }; 330 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 331 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 332 #define nd_opts_pi nd_opt_each.pi_beg 333 #define nd_opts_pi_end nd_opt_each.pi_end 334 #define nd_opts_rh nd_opt_each.rh 335 #define nd_opts_mtu nd_opt_each.mtu 336 #define nd_opts_adv nd_opt_each.adv 337 #define nd_opts_hai nd_opt_each.hai 338 #define nd_opts_search nd_opt_each.search 339 #define nd_opts_last nd_opt_each.last 340 #define nd_opts_done nd_opt_each.done 341 342 /* XXX: need nd6_var.h?? */ 343 /* nd6.c */ 344 void nd6_init (void); 345 void nd6_ifattach (struct ifnet *); 346 int nd6_is_addr_neighbor (struct sockaddr_in6 *, struct ifnet *); 347 void nd6_option_init (void *, int, union nd_opts *); 348 struct nd_opt_hdr *nd6_option (union nd_opts *); 349 int nd6_options (union nd_opts *); 350 struct rtentry *nd6_lookup (struct in6_addr *, int, struct ifnet *); 351 void nd6_setmtu (struct ifnet *); 352 void nd6_timer (void *); 353 void nd6_purge (struct ifnet *); 354 struct llinfo_nd6 *nd6_free (struct rtentry *); 355 void nd6_nud_hint (struct rtentry *, struct in6_addr *, int); 356 int nd6_resolve (struct ifnet *, struct rtentry *, 357 struct mbuf *, struct sockaddr *, u_char *); 358 void nd6_rtrequest (int, struct rtentry *, struct rt_addrinfo *); 359 int nd6_ioctl (u_long, caddr_t, struct ifnet *); 360 struct rtentry *nd6_cache_lladdr (struct ifnet *, struct in6_addr *, 361 char *, int, int, int); 362 int nd6_output (struct ifnet *, struct ifnet *, struct mbuf *, 363 struct sockaddr_in6 *, struct rtentry *); 364 int nd6_storelladdr (struct ifnet *, struct rtentry *, struct mbuf *, 365 struct sockaddr *, u_char *); 366 int nd6_need_cache (struct ifnet *); 367 368 /* nd6_nbr.c */ 369 void nd6_na_input (struct mbuf *, int, int); 370 void nd6_na_output (struct ifnet *, const struct in6_addr *, 371 const struct in6_addr *, u_long, int, struct sockaddr *); 372 void nd6_ns_input (struct mbuf *, int, int); 373 void nd6_ns_output (struct ifnet *, const struct in6_addr *, 374 const struct in6_addr *, struct llinfo_nd6 *, int); 375 caddr_t nd6_ifptomac (struct ifnet *); 376 void nd6_dad_start (struct ifaddr *, int *); 377 void nd6_dad_stop (struct ifaddr *); 378 void nd6_dad_duplicated (struct ifaddr *); 379 380 /* nd6_rtr.c */ 381 void nd6_rs_input (struct mbuf *, int, int); 382 void nd6_ra_input (struct mbuf *, int, int); 383 void prelist_del (struct nd_prefix *); 384 void defrouter_addreq (struct nd_defrouter *); 385 void defrouter_delreq (struct nd_defrouter *, int); 386 void defrouter_select (void); 387 void defrtrlist_del (struct nd_defrouter *); 388 void prelist_remove (struct nd_prefix *); 389 int prelist_update (struct nd_prefix *, struct nd_defrouter *, 390 struct mbuf *); 391 int nd6_prelist_add (struct nd_prefix *, struct nd_defrouter *, 392 struct nd_prefix **); 393 int nd6_prefix_onlink (struct nd_prefix *); 394 int nd6_prefix_offlink (struct nd_prefix *); 395 void pfxlist_onlink_check (void); 396 struct nd_defrouter *defrouter_lookup (struct in6_addr *, 397 struct ifnet *); 398 struct nd_prefix *nd6_prefix_lookup (struct nd_prefix *); 399 int in6_init_prefix_ltimes (struct nd_prefix *ndpr); 400 void rt6_flush (struct in6_addr *, struct ifnet *); 401 int nd6_setdefaultiface (int); 402 int in6_tmpifadd (const struct in6_ifaddr *, int); 403 404 #endif /* _KERNEL */ 405 406 #endif /* _NETINET6_ND6_H_ */ 407