Watt-32 tcp/ip: inc/netinet6/nd6.h Source File

00001 00005 /* $FreeBSD: src/sys/netinet6/nd6.h,v 1.10 2002/04/19 04:46:23 suz Exp $ */ 00006 /* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ */ 00007 00008 /* 00009 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 00010 * All rights reserved. 00011 * 00012 * Redistribution and use in source and binary forms, with or without 00013 * modification, are permitted provided that the following conditions 00014 * are met: 00015 * 1. Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 2. Redistributions in binary form must reproduce the above copyright 00018 * notice, this list of conditions and the following disclaimer in the 00019 * documentation and/or other materials provided with the distribution. 00020 * 3. Neither the name of the project nor the names of its contributors 00021 * may be used to endorse or promote products derived from this software 00022 * without specific prior written permission. 00023 * 00024 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 00025 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00026 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00027 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 00028 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00029 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00030 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00031 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00032 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00033 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00034 * SUCH DAMAGE. 00035 */ 00036 00037 #ifndef _NETINET6_ND6_H_ 00038 #define _NETINET6_ND6_H_ 00039 00040 /* see net/route.h, or net/if_inarp.h */ 00041 #ifndef RTF_ANNOUNCE 00042 #define RTF_ANNOUNCE RTF_PROTO2 00043 #endif 00044 00045 #include <sys/queue.h> 00046 #include <sys/callout.h> 00047 00048 struct llinfo_nd6 { 00049 struct llinfo_nd6 *ln_next; 00050 struct llinfo_nd6 *ln_prev; 00051 struct rtentry *ln_rt; 00052 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 00053 long ln_asked; /* number of queries already sent for this addr */ 00054 u_long ln_expire; /* lifetime for NDP state transition */ 00055 short ln_state; /* reachability state */ 00056 short ln_router; /* 2^0: ND6 router bit */ 00057 int ln_byhint; /* # of times we made it reachable by UL hint */ 00058 }; 00059 00060 #define ND6_LLINFO_NOSTATE -2 00061 /* 00062 * We don't need the WAITDELETE state any more, but we keep the definition 00063 * in a comment line instead of removing it. This is necessary to avoid 00064 * unintentionally reusing the value for another purpose, which might 00065 * affect backward compatibility with old applications. 00066 * (20000711 jinmei@kame.net) 00067 */ 00068 /* #define ND6_LLINFO_WAITDELETE -1 */ 00069 #define ND6_LLINFO_INCOMPLETE 0 00070 #define ND6_LLINFO_REACHABLE 1 00071 #define ND6_LLINFO_STALE 2 00072 #define ND6_LLINFO_DELAY 3 00073 #define ND6_LLINFO_PROBE 4 00074 00075 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 00076 00077 struct nd_ifinfo { 00078 u_int32_t linkmtu; /* LinkMTU */ 00079 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 00080 u_int32_t basereachable; /* BaseReachableTime */ 00081 u_int32_t reachable; /* Reachable Time */ 00082 u_int32_t retrans; /* Retrans Timer */ 00083 u_int32_t flags; /* Flags */ 00084 int recalctm; /* BaseReacable re-calculation timer */ 00085 u_int8_t chlim; /* CurHopLimit */ 00086 u_int8_t receivedra; 00087 /* the following 3 members are for privacy extension for addrconf */ 00088 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 00089 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 00090 u_int8_t randomid[8]; /* current random ID */ 00091 }; 00092 00093 #define ND6_IFF_PERFORMNUD 0x1 00094 00095 struct in6_nbrinfo { 00096 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 00097 struct in6_addr addr; /* IPv6 address of the neighbor */ 00098 long asked; /* number of queries already sent for this addr */ 00099 int isrouter; /* if it acts as a router */ 00100 int state; /* reachability state */ 00101 int expire; /* lifetime for NDP state transition */ 00102 }; 00103 00104 #define DRLSTSIZ 10 00105 #define PRLSTSIZ 10 00106 struct in6_drlist { 00107 char ifname[IFNAMSIZ]; 00108 struct { 00109 struct in6_addr rtaddr; 00110 u_char flags; 00111 u_short rtlifetime; 00112 u_long expire; 00113 u_short if_index; 00114 } defrouter[DRLSTSIZ]; 00115 }; 00116 00117 struct in6_defrouter { 00118 struct sockaddr_in6 rtaddr; 00119 u_char flags; 00120 u_short rtlifetime; 00121 u_long expire; 00122 u_short if_index; 00123 }; 00124 00125 struct in6_prlist { 00126 char ifname[IFNAMSIZ]; 00127 struct { 00128 struct in6_addr prefix; 00129 struct prf_ra raflags; 00130 u_char prefixlen; 00131 u_char origin; 00132 u_int32_t vltime; 00133 u_int32_t pltime; 00134 time_t expire; 00135 u_short if_index; 00136 u_short advrtrs; /* number of advertisement routers */ 00137 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 00138 } prefix[PRLSTSIZ]; 00139 }; 00140 00141 struct in6_prefix { 00142 struct sockaddr_in6 prefix; 00143 struct prf_ra raflags; 00144 u_char prefixlen; 00145 u_char origin; 00146 u_long vltime; 00147 u_long pltime; 00148 u_long expire; 00149 u_int32_t flags; 00150 int refcnt; 00151 u_short if_index; 00152 u_short advrtrs; /* number of advertisement routers */ 00153 /* struct sockaddr_in6 advrtr[] */ 00154 }; 00155 00156 #ifdef _KERNEL 00157 struct in6_ondireq { 00158 char ifname[IFNAMSIZ]; 00159 struct { 00160 u_int32_t linkmtu; /* LinkMTU */ 00161 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 00162 u_int32_t basereachable; /* BaseReachableTime */ 00163 u_int32_t reachable; /* Reachable Time */ 00164 u_int32_t retrans; /* Retrans Timer */ 00165 u_int32_t flags; /* Flags */ 00166 int recalctm; /* BaseReacable re-calculation timer */ 00167 u_int8_t chlim; /* CurHopLimit */ 00168 u_int8_t receivedra; 00169 } ndi; 00170 }; 00171 #endif 00172 00173 struct in6_ndireq { 00174 char ifname[IFNAMSIZ]; 00175 struct nd_ifinfo ndi; 00176 }; 00177 00178 struct in6_ndifreq { 00179 char ifname[IFNAMSIZ]; 00180 u_long ifindex; 00181 }; 00182 00183 /* Prefix status */ 00184 #define NDPRF_ONLINK 0x1 00185 #define NDPRF_DETACHED 0x2 00186 00187 /* protocol constants */ 00188 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 00189 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 00190 #define MAX_RTR_SOLICITATIONS 3 00191 00192 #define ND6_INFINITE_LIFETIME 0xffffffff 00193 00194 #ifdef _KERNEL 00195 /* node constants */ 00196 #define MAX_REACHABLE_TIME 3600000 /* msec */ 00197 #define REACHABLE_TIME 30000 /* msec */ 00198 #define RETRANS_TIMER 1000 /* msec */ 00199 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 00200 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 00201 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 00202 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 00203 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 00204 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 00205 #define ND_COMPUTE_RTIME(x) \ 00206 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 00207 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 00208 00209 TAILQ_HEAD(nd_drhead, nd_defrouter); 00210 struct nd_defrouter { 00211 TAILQ_ENTRY(nd_defrouter) dr_entry; 00212 struct in6_addr rtaddr; 00213 u_char flags; /* flags on RA message */ 00214 u_short rtlifetime; 00215 u_long expire; 00216 u_long advint; /* Mobile IPv6 addition (milliseconds) */ 00217 u_long advint_expire; /* Mobile IPv6 addition */ 00218 int advints_lost; /* Mobile IPv6 addition */ 00219 struct ifnet *ifp; 00220 }; 00221 00222 struct nd_prefix { 00223 struct ifnet *ndpr_ifp; 00224 LIST_ENTRY(nd_prefix) ndpr_entry; 00225 struct sockaddr_in6 ndpr_prefix; /* prefix */ 00226 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 00227 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 00228 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 00229 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 00230 time_t ndpr_expire; /* expiration time of the prefix */ 00231 time_t ndpr_preferred; /* preferred time of the prefix */ 00232 struct prf_ra ndpr_flags; 00233 u_int32_t ndpr_stateflags; /* actual state flags */ 00234 /* list of routers that advertise the prefix: */ 00235 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 00236 u_char ndpr_plen; 00237 int ndpr_refcnt; /* reference couter from addresses */ 00238 }; 00239 00240 #define ndpr_next ndpr_entry.le_next 00241 00242 #define ndpr_raf ndpr_flags 00243 #define ndpr_raf_onlink ndpr_flags.onlink 00244 #define ndpr_raf_auto ndpr_flags.autonomous 00245 00246 /* 00247 * We keep expired prefix for certain amount of time, for validation purposes. 00248 * 1800s = MaxRtrAdvInterval 00249 */ 00250 #define NDPR_KEEP_EXPIRED (1800 * 2) 00251 00252 /* 00253 * Message format for use in obtaining information about prefixes 00254 * from inet6 sysctl function 00255 */ 00256 struct inet6_ndpr_msghdr { 00257 u_short inpm_msglen; /* to skip over non-understood messages */ 00258 u_char inpm_version; /* future binary compatibility */ 00259 u_char inpm_type; /* message type */ 00260 struct in6_addr inpm_prefix; 00261 u_long prm_vltim; 00262 u_long prm_pltime; 00263 u_long prm_expire; 00264 u_long prm_preferred; 00265 struct in6_prflags prm_flags; 00266 u_short prm_index; /* index for associated ifp */ 00267 u_char prm_plen; /* length of prefix in bits */ 00268 }; 00269 00270 #define prm_raf_onlink prm_flags.prf_ra.onlink 00271 #define prm_raf_auto prm_flags.prf_ra.autonomous 00272 00273 #define prm_statef_onlink prm_flags.prf_state.onlink 00274 00275 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 00276 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 00277 00278 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 00279 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 00280 00281 struct nd_pfxrouter { 00282 LIST_ENTRY(nd_pfxrouter) pfr_entry; 00283 #define pfr_next pfr_entry.le_next 00284 struct nd_defrouter *router; 00285 }; 00286 00287 LIST_HEAD(nd_prhead, nd_prefix); 00288 00289 /* nd6.c */ 00290 extern int nd6_prune; 00291 extern int nd6_delay; 00292 extern int nd6_umaxtries; 00293 extern int nd6_mmaxtries; 00294 extern int nd6_useloopback; 00295 extern int nd6_maxnudhint; 00296 extern int nd6_gctimer; 00297 extern struct llinfo_nd6 llinfo_nd6; 00298 extern struct nd_ifinfo *nd_ifinfo; 00299 extern struct nd_drhead nd_defrouter; 00300 extern struct nd_prhead nd_prefix; 00301 extern int nd6_debug; 00302 00303 #define nd6log(x) do { if (nd6_debug) log x; } while (0) 00304 00305 extern struct callout nd6_timer_ch; 00306 00307 /* nd6_rtr.c */ 00308 extern int nd6_defifindex; 00309 extern int ip6_desync_factor; /* seconds */ 00310 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 00311 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 00312 extern int ip6_temp_regen_advance; /* seconds */ 00313 00314 union nd_opts { 00315 struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */ 00316 struct { 00317 struct nd_opt_hdr *zero; 00318 struct nd_opt_hdr *src_lladdr; 00319 struct nd_opt_hdr *tgt_lladdr; 00320 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 00321 struct nd_opt_rd_hdr *rh; 00322 struct nd_opt_mtu *mtu; 00323 struct nd_opt_hdr *six; 00324 struct nd_opt_advint *adv; 00325 struct nd_opt_hai *hai; 00326 struct nd_opt_hdr *search; /* multiple opts */ 00327 struct nd_opt_hdr *last; /* multiple opts */ 00328 int done; 00329 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 00330 } nd_opt_each; 00331 }; 00332 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 00333 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 00334 #define nd_opts_pi nd_opt_each.pi_beg 00335 #define nd_opts_pi_end nd_opt_each.pi_end 00336 #define nd_opts_rh nd_opt_each.rh 00337 #define nd_opts_mtu nd_opt_each.mtu 00338 #define nd_opts_adv nd_opt_each.adv 00339 #define nd_opts_hai nd_opt_each.hai 00340 #define nd_opts_search nd_opt_each.search 00341 #define nd_opts_last nd_opt_each.last 00342 #define nd_opts_done nd_opt_each.done 00343 00344 /* XXX: need nd6_var.h?? */ 00345 /* nd6.c */ 00346 void nd6_init __P((void)); 00347 void nd6_ifattach __P((struct ifnet *)); 00348 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); 00349 void nd6_option_init __P((void *, int, union nd_opts *)); 00350 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 00351 int nd6_options __P((union nd_opts *)); 00352 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 00353 void nd6_setmtu __P((struct ifnet *)); 00354 void nd6_timer __P((void *)); 00355 void nd6_purge __P((struct ifnet *)); 00356 struct llinfo_nd6 *nd6_free __P((struct rtentry *)); 00357 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); 00358 int nd6_resolve __P((struct ifnet *, struct rtentry *, 00359 struct mbuf *, struct sockaddr *, u_char *)); 00360 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 00361 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 00362 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 00363 char *, int, int, int)); 00364 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, 00365 struct sockaddr_in6 *, struct rtentry *)); 00366 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 00367 struct sockaddr *, u_char *)); 00368 int nd6_need_cache __P((struct ifnet *)); 00369 00370 /* nd6_nbr.c */ 00371 void nd6_na_input __P((struct mbuf *, int, int)); 00372 void nd6_na_output __P((struct ifnet *, const struct in6_addr *, 00373 const struct in6_addr *, u_long, int, struct sockaddr *)); 00374 void nd6_ns_input __P((struct mbuf *, int, int)); 00375 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *, 00376 const struct in6_addr *, struct llinfo_nd6 *, int)); 00377 caddr_t nd6_ifptomac __P((struct ifnet *)); 00378 void nd6_dad_start __P((struct ifaddr *, int *)); 00379 void nd6_dad_stop __P((struct ifaddr *)); 00380 void nd6_dad_duplicated __P((struct ifaddr *)); 00381 00382 /* nd6_rtr.c */ 00383 void nd6_rs_input __P((struct mbuf *, int, int)); 00384 void nd6_ra_input __P((struct mbuf *, int, int)); 00385 void prelist_del __P((struct nd_prefix *)); 00386 void defrouter_addreq __P((struct nd_defrouter *)); 00387 void defrouter_delreq __P((struct nd_defrouter *, int)); 00388 void defrouter_select __P((void)); 00389 void defrtrlist_del __P((struct nd_defrouter *)); 00390 void prelist_remove __P((struct nd_prefix *)); 00391 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 00392 struct mbuf *)); 00393 int nd6_prelist_add __P((struct nd_prefix *, struct nd_defrouter *, 00394 struct nd_prefix **)); 00395 int nd6_prefix_onlink __P((struct nd_prefix *)); 00396 int nd6_prefix_offlink __P((struct nd_prefix *)); 00397 void pfxlist_onlink_check __P((void)); 00398 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 00399 struct ifnet *)); 00400 struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefix *)); 00401 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 00402 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 00403 int nd6_setdefaultiface __P((int)); 00404 int in6_tmpifadd __P((const struct in6_ifaddr *, int)); 00405 00406 #endif /* _KERNEL */ 00407 00408 #endif /* _NETINET6_ND6_H_ */