nd6.h revision 1.9
1 /* $NetBSD: nd6.h,v 1.9 2000/02/26 08:39:20 itojun Exp $ */ 2 /* $KAME: nd6.h,v 1.16 2000/02/24 16:34:51 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 43 struct llinfo_nd6 { 44 struct llinfo_nd6 *ln_next; 45 struct llinfo_nd6 *ln_prev; 46 struct rtentry *ln_rt; 47 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 48 long ln_asked; /* number of queries already sent for this addr */ 49 u_long ln_expire; /* lifetime for NDP state transition */ 50 short ln_state; /* reachability state */ 51 short ln_router; /* 2^0: ND6 router bit */ 52 }; 53 54 #define ND6_LLINFO_NOSTATE -2 55 #define ND6_LLINFO_WAITDELETE -1 56 #define ND6_LLINFO_INCOMPLETE 0 57 #define ND6_LLINFO_REACHABLE 1 58 #define ND6_LLINFO_STALE 2 59 #define ND6_LLINFO_DELAY 3 60 #define ND6_LLINFO_PROBE 4 61 62 #define ND6_IS_LLINFO_PROBREACH(n) ((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 int recalctm; /* BaseReacable re-calculation timer */ 71 u_int8_t chlim; /* CurHopLimit */ 72 u_int8_t receivedra; 73 }; 74 75 struct in6_nbrinfo { 76 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 77 struct in6_addr addr; /* IPv6 address of the neighbor */ 78 long asked; /* number of queries already sent for this addr */ 79 int isrouter; /* if it acts as a router */ 80 int state; /* reachability state */ 81 int expire; /* lifetime for NDP state transition */ 82 }; 83 84 #define DRLSTSIZ 10 85 #define PRLSTSIZ 10 86 struct in6_drlist { 87 char ifname[IFNAMSIZ]; 88 struct { 89 struct in6_addr rtaddr; 90 u_char flags; 91 u_short rtlifetime; 92 u_long expire; 93 u_short if_index; 94 } defrouter[DRLSTSIZ]; 95 }; 96 97 struct in6_prlist { 98 char ifname[IFNAMSIZ]; 99 struct { 100 struct in6_addr prefix; 101 struct prf_ra raflags; 102 u_char prefixlen; 103 u_char origin; 104 u_long vltime; 105 u_long pltime; 106 u_long expire; 107 u_short if_index; 108 u_short advrtrs; /* number of advertisement routers */ 109 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 110 } prefix[PRLSTSIZ]; 111 }; 112 113 struct in6_ndireq { 114 char ifname[IFNAMSIZ]; 115 struct nd_ifinfo ndi; 116 }; 117 118 struct in6_ndifreq { 119 char ifname[IFNAMSIZ]; 120 u_long ifindex; 121 }; 122 123 124 /* protocol constants */ 125 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 126 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 127 #define MAX_RTR_SOLICITATIONS 3 128 129 #define ND6_INFINITE_LIFETIME 0xffffffff 130 131 #ifdef _KERNEL 132 /* node constants */ 133 #define MAX_REACHABLE_TIME 3600000 /* msec */ 134 #define REACHABLE_TIME 30000 /* msec */ 135 #define RETRANS_TIMER 1000 /* msec */ 136 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 137 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 138 #define ND_COMPUTE_RTIME(x) \ 139 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 140 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 141 142 TAILQ_HEAD(nd_drhead, nd_defrouter); 143 struct nd_defrouter { 144 TAILQ_ENTRY(nd_defrouter) dr_entry; 145 struct in6_addr rtaddr; 146 u_char flags; 147 u_short rtlifetime; 148 u_long expire; 149 struct ifnet *ifp; 150 }; 151 152 struct nd_prefix { 153 struct ifnet *ndpr_ifp; 154 LIST_ENTRY(nd_prefix) ndpr_entry; 155 struct sockaddr_in6 ndpr_prefix; /* prefix */ 156 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 157 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 158 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 159 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 160 time_t ndpr_expire; /* expiration time of the prefix */ 161 time_t ndpr_preferred; /* preferred time of the prefix */ 162 struct prf_ra ndpr_flags; 163 /* list of routers that advertise the prefix: */ 164 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 165 u_char ndpr_plen; 166 struct ndpr_stateflags { 167 /* if this prefix can be regarded as on-link */ 168 u_char onlink : 1; 169 } ndpr_stateflags; 170 }; 171 172 #define ndpr_next ndpr_entry.le_next 173 174 #define ndpr_raf ndpr_flags 175 #define ndpr_raf_onlink ndpr_flags.onlink 176 #define ndpr_raf_auto ndpr_flags.autonomous 177 178 #define ndpr_statef_onlink ndpr_stateflags.onlink 179 #define ndpr_statef_addmark ndpr_stateflags.addmark 180 181 /* 182 * We keep expired prefix for certain amount of time, for validation purposes. 183 * 1800s = MaxRtrAdvInterval 184 */ 185 #define NDPR_KEEP_EXPIRED (1800 * 2) 186 187 /* 188 * Message format for use in obtaining information about prefixes 189 * from inet6 sysctl function 190 */ 191 struct inet6_ndpr_msghdr { 192 u_short inpm_msglen; /* to skip over non-understood messages */ 193 u_char inpm_version; /* future binary compatability */ 194 u_char inpm_type; /* message type */ 195 struct in6_addr inpm_prefix; 196 u_long prm_vltim; 197 u_long prm_pltime; 198 u_long prm_expire; 199 u_long prm_preferred; 200 struct in6_prflags prm_flags; 201 u_short prm_index; /* index for associated ifp */ 202 u_char prm_plen; /* length of prefix in bits */ 203 }; 204 205 #define prm_raf_onlink prm_flags.prf_ra.onlink 206 #define prm_raf_auto prm_flags.prf_ra.autonomous 207 208 #define prm_statef_onlink prm_flags.prf_state.onlink 209 210 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 211 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 212 213 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 214 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 215 216 struct nd_pfxrouter { 217 LIST_ENTRY(nd_pfxrouter) pfr_entry; 218 #define pfr_next pfr_entry.le_next 219 struct nd_defrouter *router; 220 }; 221 222 LIST_HEAD(nd_prhead, nd_prefix); 223 224 /* nd6.c */ 225 extern int nd6_prune; 226 extern int nd6_delay; 227 extern int nd6_umaxtries; 228 extern int nd6_mmaxtries; 229 extern int nd6_useloopback; 230 extern struct llinfo_nd6 llinfo_nd6; 231 extern struct nd_ifinfo *nd_ifinfo; 232 extern struct nd_drhead nd_defrouter; 233 extern struct nd_prhead nd_prefix; 234 235 /* nd6_rtr.c */ 236 extern int nd6_defifindex; 237 238 union nd_opts { 239 struct nd_opt_hdr *nd_opt_array[9]; 240 struct { 241 struct nd_opt_hdr *zero; 242 struct nd_opt_hdr *src_lladdr; 243 struct nd_opt_hdr *tgt_lladdr; 244 struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */ 245 struct nd_opt_rd_hdr *rh; 246 struct nd_opt_mtu *mtu; 247 struct nd_opt_hdr *search; /* multiple opts */ 248 struct nd_opt_hdr *last; /* multiple opts */ 249 int done; 250 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 251 } nd_opt_each; 252 }; 253 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 254 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 255 #define nd_opts_pi nd_opt_each.pi_beg 256 #define nd_opts_pi_end nd_opt_each.pi_end 257 #define nd_opts_rh nd_opt_each.rh 258 #define nd_opts_mtu nd_opt_each.mtu 259 #define nd_opts_search nd_opt_each.search 260 #define nd_opts_last nd_opt_each.last 261 #define nd_opts_done nd_opt_each.done 262 263 /* XXX: need nd6_var.h?? */ 264 /* nd6.c */ 265 void nd6_init __P((void)); 266 void nd6_ifattach __P((struct ifnet *)); 267 int nd6_is_addr_neighbor __P((struct in6_addr *, struct ifnet *)); 268 void nd6_option_init __P((void *, int, union nd_opts *)); 269 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 270 int nd6_options __P((union nd_opts *)); 271 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 272 void nd6_setmtu __P((struct ifnet *)); 273 void nd6_timer __P((void *)); 274 void nd6_purge __P((struct ifnet *)); 275 void nd6_free __P((struct rtentry *)); 276 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *)); 277 int nd6_resolve __P((struct ifnet *, struct rtentry *, 278 struct mbuf *, struct sockaddr *, u_char *)); 279 void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 280 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 281 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 282 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 283 char *, int, int, int)); 284 /* for test */ 285 int nd6_output __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *, 286 struct rtentry *)); 287 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 288 struct sockaddr *, u_char *)); 289 290 /* nd6_nbr.c */ 291 void nd6_na_input __P((struct mbuf *, int, int)); 292 void nd6_na_output __P((struct ifnet *, struct in6_addr *, 293 struct in6_addr *, u_long, int, struct sockaddr *)); 294 void nd6_ns_input __P((struct mbuf *, int, int)); 295 void nd6_ns_output __P((struct ifnet *, struct in6_addr *, 296 struct in6_addr *, struct llinfo_nd6 *, int)); 297 caddr_t nd6_ifptomac __P((struct ifnet *)); 298 void nd6_dad_start __P((struct ifaddr *, int *)); 299 void nd6_dad_duplicated __P((struct ifaddr *)); 300 301 /* nd6_rtr.c */ 302 void nd6_rs_input __P((struct mbuf *, int, int)); 303 void nd6_ra_input __P((struct mbuf *, int, int)); 304 void prelist_del __P((struct nd_prefix *)); 305 void defrouter_addreq __P((struct nd_defrouter *)); 306 void defrouter_delreq __P((struct nd_defrouter *, int)); 307 void defrouter_select __P((void)); 308 void defrtrlist_del __P((struct nd_defrouter *)); 309 void prelist_remove __P((struct nd_prefix *)); 310 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 311 struct mbuf *)); 312 void pfxlist_onlink_check __P((void)); 313 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 314 struct ifnet *)); 315 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 316 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 317 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 318 int nd6_setdefaultiface __P((int)); 319 320 #endif /* _KERNEL */ 321 322 #endif /* _NETINET6_ND6_H_ */ 323
Indexes created Wed Sep 24 05:09:52 GMT 2025