nd6.h revision 1.28
1 /* $NetBSD: nd6.h,v 1.28 2002/05/30 05:06:29 itojun Exp $ */ 2 /* $KAME: nd6.h,v 1.52 2001/02/19 04:40:37 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 56 #define ND6_LLINFO_NOSTATE -2 57 /* 58 * We don't need the WAITDELETE state any more, but we keep the definition 59 * in a comment line instead of removing it. This is necessary to avoid 60 * unintentionally reusing the value for another purpose, which might 61 * affect backward compatibility with old applications. 62 * (20000711 jinmei (at) kame.net) 63 */ 64 /* #define ND6_LLINFO_WAITDELETE -1 */ 65 #define ND6_LLINFO_INCOMPLETE 0 66 #define ND6_LLINFO_REACHABLE 1 67 #define ND6_LLINFO_STALE 2 68 #define ND6_LLINFO_DELAY 3 69 #define ND6_LLINFO_PROBE 4 70 71 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 72 73 /* 74 * Since the granularity of our retransmission timer is seconds, we should 75 * ensure that a positive timer value will be mapped to at least one second. 76 */ 77 #define ND6_RETRANS_SEC(r) (((r) + 999) / 1000) 78 79 struct nd_ifinfo { 80 u_int32_t linkmtu; /* LinkMTU */ 81 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 82 u_int32_t basereachable; /* BaseReachableTime */ 83 u_int32_t reachable; /* Reachable Time */ 84 u_int32_t retrans; /* Retrans Timer */ 85 u_int32_t flags; /* Flags */ 86 int recalctm; /* BaseReacable re-calculation timer */ 87 u_int8_t chlim; /* CurHopLimit */ 88 u_int8_t initialized; /* Flag to see the entry is initialized */ 89 /* the following 3 members are for privacy extension for addrconf */ 90 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 91 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 92 u_int8_t randomid[8]; /* current random ID */ 93 }; 94 95 #define ND6_IFF_PERFORMNUD 0x1 96 97 #ifdef _KERNEL 98 #define ND_IFINFO(ifp) \ 99 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 100 #define IN6_LINKMTU(ifp) \ 101 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 102 ? ND_IFINFO(ifp)->linkmtu : (ifp)->if_mtu) 103 #endif 104 105 struct in6_nbrinfo { 106 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 107 struct in6_addr addr; /* IPv6 address of the neighbor */ 108 long asked; /* number of queries already sent for this addr */ 109 int isrouter; /* if it acts as a router */ 110 int state; /* reachability state */ 111 int expire; /* lifetime for NDP state transition */ 112 }; 113 114 #define DRLSTSIZ 10 115 #define PRLSTSIZ 10 116 struct in6_drlist { 117 char ifname[IFNAMSIZ]; 118 struct { 119 struct in6_addr rtaddr; 120 u_char flags; 121 u_short rtlifetime; 122 u_long expire; 123 u_short if_index; 124 } defrouter[DRLSTSIZ]; 125 }; 126 127 struct in6_prlist { 128 char ifname[IFNAMSIZ]; 129 struct { 130 struct in6_addr prefix; 131 struct prf_ra raflags; 132 u_char prefixlen; 133 u_char origin; 134 u_long vltime; 135 u_long pltime; 136 u_long expire; 137 u_short if_index; 138 u_short advrtrs; /* number of advertisement routers */ 139 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 140 } prefix[PRLSTSIZ]; 141 }; 142 143 #ifdef _KERNEL 144 struct in6_ondireq { 145 char ifname[IFNAMSIZ]; 146 struct { 147 u_int32_t linkmtu; /* LinkMTU */ 148 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 149 u_int32_t basereachable; /* BaseReachableTime */ 150 u_int32_t reachable; /* Reachable Time */ 151 u_int32_t retrans; /* Retrans Timer */ 152 u_int32_t flags; /* Flags */ 153 int recalctm; /* BaseReacable re-calculation timer */ 154 u_int8_t chlim; /* CurHopLimit */ 155 u_int8_t receivedra; 156 } ndi; 157 }; 158 #endif 159 160 struct in6_ndireq { 161 char ifname[IFNAMSIZ]; 162 struct nd_ifinfo ndi; 163 }; 164 165 struct in6_ndifreq { 166 char ifname[IFNAMSIZ]; 167 u_long ifindex; 168 }; 169 170 171 /* protocol constants */ 172 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 173 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 174 #define MAX_RTR_SOLICITATIONS 3 175 176 #define ND6_INFINITE_LIFETIME 0xffffffff 177 178 #ifdef _KERNEL 179 /* node constants */ 180 #define MAX_REACHABLE_TIME 3600000 /* msec */ 181 #define REACHABLE_TIME 30000 /* msec */ 182 #define RETRANS_TIMER 1000 /* msec */ 183 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 184 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 185 #define ND_COMPUTE_RTIME(x) \ 186 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 187 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 188 189 TAILQ_HEAD(nd_drhead, nd_defrouter); 190 struct nd_defrouter { 191 TAILQ_ENTRY(nd_defrouter) dr_entry; 192 struct in6_addr rtaddr; 193 u_char flags; 194 u_short rtlifetime; 195 u_long expire; 196 struct ifnet *ifp; 197 }; 198 199 struct nd_prefix { 200 struct ifnet *ndpr_ifp; 201 LIST_ENTRY(nd_prefix) ndpr_entry; 202 struct sockaddr_in6 ndpr_prefix; /* prefix */ 203 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 204 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 205 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 206 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 207 time_t ndpr_expire; /* expiration time of the prefix */ 208 time_t ndpr_preferred; /* preferred time of the prefix */ 209 struct prf_ra ndpr_flags; 210 /* list of routers that advertise the prefix: */ 211 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 212 u_char ndpr_plen; 213 struct ndpr_stateflags { 214 /* if this prefix can be regarded as on-link */ 215 u_char onlink : 1; 216 } ndpr_stateflags; 217 }; 218 219 #define ndpr_next ndpr_entry.le_next 220 221 #define ndpr_raf ndpr_flags 222 #define ndpr_raf_onlink ndpr_flags.onlink 223 #define ndpr_raf_auto ndpr_flags.autonomous 224 225 #define ndpr_statef_onlink ndpr_stateflags.onlink 226 #define ndpr_statef_addmark ndpr_stateflags.addmark 227 228 /* 229 * We keep expired prefix for certain amount of time, for validation purposes. 230 * 1800s = MaxRtrAdvInterval 231 */ 232 #define NDPR_KEEP_EXPIRED (1800 * 2) 233 234 /* 235 * Message format for use in obtaining information about prefixes 236 * from inet6 sysctl function 237 */ 238 struct inet6_ndpr_msghdr { 239 u_short inpm_msglen; /* to skip over non-understood messages */ 240 u_char inpm_version; /* future binary compatibility */ 241 u_char inpm_type; /* message type */ 242 struct in6_addr inpm_prefix; 243 u_long prm_vltim; 244 u_long prm_pltime; 245 u_long prm_expire; 246 u_long prm_preferred; 247 struct in6_prflags prm_flags; 248 u_short prm_index; /* index for associated ifp */ 249 u_char prm_plen; /* length of prefix in bits */ 250 }; 251 252 #define prm_raf_onlink prm_flags.prf_ra.onlink 253 #define prm_raf_auto prm_flags.prf_ra.autonomous 254 255 #define prm_statef_onlink prm_flags.prf_state.onlink 256 257 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 258 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 259 260 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 261 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 262 263 struct nd_pfxrouter { 264 LIST_ENTRY(nd_pfxrouter) pfr_entry; 265 #define pfr_next pfr_entry.le_next 266 struct nd_defrouter *router; 267 }; 268 269 LIST_HEAD(nd_prhead, nd_prefix); 270 271 /* nd6.c */ 272 extern int nd6_prune; 273 extern int nd6_delay; 274 extern int nd6_umaxtries; 275 extern int nd6_mmaxtries; 276 extern int nd6_useloopback; 277 extern int nd6_maxnudhint; 278 extern int nd6_gctimer; 279 extern struct llinfo_nd6 llinfo_nd6; 280 extern struct nd_drhead nd_defrouter; 281 extern struct nd_prhead nd_prefix; 282 extern int nd6_debug; 283 284 #define nd6log(x) do { if (nd6_debug) log x; } while (0) 285 286 extern struct callout nd6_timer_ch; 287 288 /* nd6_rtr.c */ 289 extern int nd6_defifindex; 290 291 union nd_opts { 292 struct nd_opt_hdr *nd_opt_array[8]; 293 struct { 294 struct nd_opt_hdr *zero; 295 struct nd_opt_hdr *src_lladdr; 296 struct nd_opt_hdr *tgt_lladdr; 297 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 298 struct nd_opt_rd_hdr *rh; 299 struct nd_opt_mtu *mtu; 300 struct nd_opt_hdr *search; /* multiple opts */ 301 struct nd_opt_hdr *last; /* multiple opts */ 302 int done; 303 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 304 } nd_opt_each; 305 }; 306 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 307 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 308 #define nd_opts_pi nd_opt_each.pi_beg 309 #define nd_opts_pi_end nd_opt_each.pi_end 310 #define nd_opts_rh nd_opt_each.rh 311 #define nd_opts_mtu nd_opt_each.mtu 312 #define nd_opts_search nd_opt_each.search 313 #define nd_opts_last nd_opt_each.last 314 #define nd_opts_done nd_opt_each.done 315 316 /* XXX: need nd6_var.h?? */ 317 /* nd6.c */ 318 void nd6_init __P((void)); 319 struct nd_ifinfo *nd6_ifattach __P((struct ifnet *)); 320 void nd6_ifdetach __P((struct nd_ifinfo *)); 321 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); 322 void nd6_option_init __P((void *, int, union nd_opts *)); 323 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 324 int nd6_options __P((union nd_opts *)); 325 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 326 void nd6_setmtu __P((struct ifnet *)); 327 void nd6_timer __P((void *)); 328 void nd6_purge __P((struct ifnet *)); 329 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); 330 int nd6_resolve __P((struct ifnet *, struct rtentry *, 331 struct mbuf *, struct sockaddr *, u_char *)); 332 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 333 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 334 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 335 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 336 char *, int, int, int)); 337 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, 338 struct sockaddr_in6 *, struct rtentry *)); 339 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 340 struct sockaddr *, u_char *)); 341 int nd6_need_cache __P((struct ifnet *)); 342 343 /* nd6_nbr.c */ 344 void nd6_na_input __P((struct mbuf *, int, int)); 345 void nd6_na_output __P((struct ifnet *, const struct in6_addr *, 346 const struct in6_addr *, u_long, int, struct sockaddr *)); 347 void nd6_ns_input __P((struct mbuf *, int, int)); 348 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *, 349 const struct in6_addr *, struct llinfo_nd6 *, int)); 350 caddr_t nd6_ifptomac __P((struct ifnet *)); 351 void nd6_dad_start __P((struct ifaddr *, int *)); 352 void nd6_dad_stop __P((struct ifaddr *)); 353 void nd6_dad_duplicated __P((struct ifaddr *)); 354 355 /* nd6_rtr.c */ 356 void nd6_rs_input __P((struct mbuf *, int, int)); 357 void nd6_ra_input __P((struct mbuf *, int, int)); 358 void prelist_del __P((struct nd_prefix *)); 359 void defrouter_addreq __P((struct nd_defrouter *)); 360 void defrouter_delreq __P((struct nd_defrouter *, int)); 361 void defrouter_select __P((void)); 362 void defrtrlist_del __P((struct nd_defrouter *)); 363 void prelist_remove __P((struct nd_prefix *)); 364 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 365 struct mbuf *)); 366 void pfxlist_onlink_check __P((void)); 367 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 368 struct ifnet *)); 369 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 370 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 371 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 372 int nd6_setdefaultiface __P((int)); 373 374 #endif /* _KERNEL */ 375 376 #endif /* _NETINET6_ND6_H_ */ 377
Indexes created Sun Sep 28 16:09:52 GMT 2025