nd6.h revision 1.16
1 /* $NetBSD: nd6.h,v 1.16 2001/01/17 04:05:45 itojun Exp $ */ 2 /* $KAME: nd6.h,v 1.23 2000/06/04 12:54:57 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 #define ND6_LLINFO_WAITDELETE -1 58 #define ND6_LLINFO_INCOMPLETE 0 59 #define ND6_LLINFO_REACHABLE 1 60 #define ND6_LLINFO_STALE 2 61 #define ND6_LLINFO_DELAY 3 62 #define ND6_LLINFO_PROBE 4 63 64 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 65 66 struct nd_ifinfo { 67 u_int32_t linkmtu; /* LinkMTU */ 68 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 69 u_int32_t basereachable; /* BaseReachableTime */ 70 u_int32_t reachable; /* Reachable Time */ 71 u_int32_t retrans; /* Retrans Timer */ 72 u_int32_t flags; /* Flags */ 73 int recalctm; /* BaseReacable re-calculation timer */ 74 u_int8_t chlim; /* CurHopLimit */ 75 u_int8_t receivedra; 76 }; 77 78 #define ND6_IFF_PERFORMNUD 0x1 79 80 struct in6_nbrinfo { 81 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 82 struct in6_addr addr; /* IPv6 address of the neighbor */ 83 long asked; /* number of queries already sent for this addr */ 84 int isrouter; /* if it acts as a router */ 85 int state; /* reachability state */ 86 int expire; /* lifetime for NDP state transition */ 87 }; 88 89 #define DRLSTSIZ 10 90 #define PRLSTSIZ 10 91 struct in6_drlist { 92 char ifname[IFNAMSIZ]; 93 struct { 94 struct in6_addr rtaddr; 95 u_char flags; 96 u_short rtlifetime; 97 u_long expire; 98 u_short if_index; 99 } defrouter[DRLSTSIZ]; 100 }; 101 102 struct in6_prlist { 103 char ifname[IFNAMSIZ]; 104 struct { 105 struct in6_addr prefix; 106 struct prf_ra raflags; 107 u_char prefixlen; 108 u_char origin; 109 u_long vltime; 110 u_long pltime; 111 u_long expire; 112 u_short if_index; 113 u_short advrtrs; /* number of advertisement routers */ 114 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 115 } prefix[PRLSTSIZ]; 116 }; 117 118 struct in6_ndireq { 119 char ifname[IFNAMSIZ]; 120 struct nd_ifinfo ndi; 121 }; 122 123 struct in6_ndifreq { 124 char ifname[IFNAMSIZ]; 125 u_long ifindex; 126 }; 127 128 129 /* protocol constants */ 130 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 131 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 132 #define MAX_RTR_SOLICITATIONS 3 133 134 #define ND6_INFINITE_LIFETIME 0xffffffff 135 136 #ifdef _KERNEL 137 /* node constants */ 138 #define MAX_REACHABLE_TIME 3600000 /* msec */ 139 #define REACHABLE_TIME 30000 /* msec */ 140 #define RETRANS_TIMER 1000 /* msec */ 141 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 142 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 143 #define ND_COMPUTE_RTIME(x) \ 144 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 145 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 146 147 TAILQ_HEAD(nd_drhead, nd_defrouter); 148 struct nd_defrouter { 149 TAILQ_ENTRY(nd_defrouter) dr_entry; 150 struct in6_addr rtaddr; 151 u_char flags; 152 u_short rtlifetime; 153 u_long expire; 154 struct ifnet *ifp; 155 }; 156 157 struct nd_prefix { 158 struct ifnet *ndpr_ifp; 159 LIST_ENTRY(nd_prefix) ndpr_entry; 160 struct sockaddr_in6 ndpr_prefix; /* prefix */ 161 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 162 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 163 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 164 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 165 time_t ndpr_expire; /* expiration time of the prefix */ 166 time_t ndpr_preferred; /* preferred time of the prefix */ 167 struct prf_ra ndpr_flags; 168 /* list of routers that advertise the prefix: */ 169 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 170 u_char ndpr_plen; 171 struct ndpr_stateflags { 172 /* if this prefix can be regarded as on-link */ 173 u_char onlink : 1; 174 } ndpr_stateflags; 175 }; 176 177 #define ndpr_next ndpr_entry.le_next 178 179 #define ndpr_raf ndpr_flags 180 #define ndpr_raf_onlink ndpr_flags.onlink 181 #define ndpr_raf_auto ndpr_flags.autonomous 182 183 #define ndpr_statef_onlink ndpr_stateflags.onlink 184 #define ndpr_statef_addmark ndpr_stateflags.addmark 185 186 /* 187 * We keep expired prefix for certain amount of time, for validation purposes. 188 * 1800s = MaxRtrAdvInterval 189 */ 190 #define NDPR_KEEP_EXPIRED (1800 * 2) 191 192 /* 193 * Message format for use in obtaining information about prefixes 194 * from inet6 sysctl function 195 */ 196 struct inet6_ndpr_msghdr { 197 u_short inpm_msglen; /* to skip over non-understood messages */ 198 u_char inpm_version; /* future binary compatability */ 199 u_char inpm_type; /* message type */ 200 struct in6_addr inpm_prefix; 201 u_long prm_vltim; 202 u_long prm_pltime; 203 u_long prm_expire; 204 u_long prm_preferred; 205 struct in6_prflags prm_flags; 206 u_short prm_index; /* index for associated ifp */ 207 u_char prm_plen; /* length of prefix in bits */ 208 }; 209 210 #define prm_raf_onlink prm_flags.prf_ra.onlink 211 #define prm_raf_auto prm_flags.prf_ra.autonomous 212 213 #define prm_statef_onlink prm_flags.prf_state.onlink 214 215 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 216 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 217 218 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 219 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 220 221 struct nd_pfxrouter { 222 LIST_ENTRY(nd_pfxrouter) pfr_entry; 223 #define pfr_next pfr_entry.le_next 224 struct nd_defrouter *router; 225 }; 226 227 LIST_HEAD(nd_prhead, nd_prefix); 228 229 /* nd6.c */ 230 extern int nd6_prune; 231 extern int nd6_delay; 232 extern int nd6_umaxtries; 233 extern int nd6_mmaxtries; 234 extern int nd6_useloopback; 235 extern int nd6_maxnudhint; 236 extern struct llinfo_nd6 llinfo_nd6; 237 extern struct nd_ifinfo *nd_ifinfo; 238 extern struct nd_drhead nd_defrouter; 239 extern struct nd_prhead nd_prefix; 240 241 extern struct callout nd6_timer_ch; 242 243 /* nd6_rtr.c */ 244 extern int nd6_defifindex; 245 246 union nd_opts { 247 struct nd_opt_hdr *nd_opt_array[9]; 248 struct { 249 struct nd_opt_hdr *zero; 250 struct nd_opt_hdr *src_lladdr; 251 struct nd_opt_hdr *tgt_lladdr; 252 struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */ 253 struct nd_opt_rd_hdr *rh; 254 struct nd_opt_mtu *mtu; 255 struct nd_opt_hdr *search; /* multiple opts */ 256 struct nd_opt_hdr *last; /* multiple opts */ 257 int done; 258 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 259 } nd_opt_each; 260 }; 261 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 262 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 263 #define nd_opts_pi nd_opt_each.pi_beg 264 #define nd_opts_pi_end nd_opt_each.pi_end 265 #define nd_opts_rh nd_opt_each.rh 266 #define nd_opts_mtu nd_opt_each.mtu 267 #define nd_opts_search nd_opt_each.search 268 #define nd_opts_last nd_opt_each.last 269 #define nd_opts_done nd_opt_each.done 270 271 /* XXX: need nd6_var.h?? */ 272 /* nd6.c */ 273 void nd6_init __P((void)); 274 void nd6_ifattach __P((struct ifnet *)); 275 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); 276 void nd6_option_init __P((void *, int, union nd_opts *)); 277 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 278 int nd6_options __P((union nd_opts *)); 279 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 280 void nd6_setmtu __P((struct ifnet *)); 281 void nd6_timer __P((void *)); 282 void nd6_purge __P((struct ifnet *)); 283 void nd6_free __P((struct rtentry *)); 284 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); 285 int nd6_resolve __P((struct ifnet *, struct rtentry *, 286 struct mbuf *, struct sockaddr *, u_char *)); 287 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 288 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 289 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 290 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 291 char *, int, int, int)); 292 /* for test */ 293 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, 294 struct sockaddr_in6 *, struct rtentry *)); 295 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 296 struct sockaddr *, u_char *)); 297 298 /* nd6_nbr.c */ 299 void nd6_na_input __P((struct mbuf *, int, int)); 300 void nd6_na_output __P((struct ifnet *, struct in6_addr *, 301 struct in6_addr *, u_long, int, struct sockaddr *)); 302 void nd6_ns_input __P((struct mbuf *, int, int)); 303 void nd6_ns_output __P((struct ifnet *, struct in6_addr *, 304 struct in6_addr *, struct llinfo_nd6 *, int)); 305 caddr_t nd6_ifptomac __P((struct ifnet *)); 306 void nd6_dad_start __P((struct ifaddr *, int *)); 307 void nd6_dad_duplicated __P((struct ifaddr *)); 308 309 /* nd6_rtr.c */ 310 void nd6_rs_input __P((struct mbuf *, int, int)); 311 void nd6_ra_input __P((struct mbuf *, int, int)); 312 void prelist_del __P((struct nd_prefix *)); 313 void defrouter_addreq __P((struct nd_defrouter *)); 314 void defrouter_delreq __P((struct nd_defrouter *, int)); 315 void defrouter_select __P((void)); 316 void defrtrlist_del __P((struct nd_defrouter *)); 317 void prelist_remove __P((struct nd_prefix *)); 318 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 319 struct mbuf *)); 320 void pfxlist_onlink_check __P((void)); 321 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 322 struct ifnet *)); 323 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 324 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 325 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 326 int nd6_setdefaultiface __P((int)); 327 328 #endif /* _KERNEL */ 329 330 #endif /* _NETINET6_ND6_H_ */ 331
Indexes created Thu Sep 25 16:09:42 GMT 2025