nd6.h revision 1.10
1 /* $NetBSD: nd6.h,v 1.10 2000/03/23 07:03:31 thorpej 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 #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 }; 54 55 #define ND6_LLINFO_NOSTATE -2 56 #define ND6_LLINFO_WAITDELETE -1 57 #define ND6_LLINFO_INCOMPLETE 0 58 #define ND6_LLINFO_REACHABLE 1 59 #define ND6_LLINFO_STALE 2 60 #define ND6_LLINFO_DELAY 3 61 #define ND6_LLINFO_PROBE 4 62 63 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 64 65 struct nd_ifinfo { 66 u_int32_t linkmtu; /* LinkMTU */ 67 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 68 u_int32_t basereachable; /* BaseReachableTime */ 69 u_int32_t reachable; /* Reachable Time */ 70 u_int32_t retrans; /* Retrans Timer */ 71 int recalctm; /* BaseReacable re-calculation timer */ 72 u_int8_t chlim; /* CurHopLimit */ 73 u_int8_t receivedra; 74 }; 75 76 struct in6_nbrinfo { 77 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 78 struct in6_addr addr; /* IPv6 address of the neighbor */ 79 long asked; /* number of queries already sent for this addr */ 80 int isrouter; /* if it acts as a router */ 81 int state; /* reachability state */ 82 int expire; /* lifetime for NDP state transition */ 83 }; 84 85 #define DRLSTSIZ 10 86 #define PRLSTSIZ 10 87 struct in6_drlist { 88 char ifname[IFNAMSIZ]; 89 struct { 90 struct in6_addr rtaddr; 91 u_char flags; 92 u_short rtlifetime; 93 u_long expire; 94 u_short if_index; 95 } defrouter[DRLSTSIZ]; 96 }; 97 98 struct in6_prlist { 99 char ifname[IFNAMSIZ]; 100 struct { 101 struct in6_addr prefix; 102 struct prf_ra raflags; 103 u_char prefixlen; 104 u_char origin; 105 u_long vltime; 106 u_long pltime; 107 u_long expire; 108 u_short if_index; 109 u_short advrtrs; /* number of advertisement routers */ 110 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 111 } prefix[PRLSTSIZ]; 112 }; 113 114 struct in6_ndireq { 115 char ifname[IFNAMSIZ]; 116 struct nd_ifinfo ndi; 117 }; 118 119 struct in6_ndifreq { 120 char ifname[IFNAMSIZ]; 121 u_long ifindex; 122 }; 123 124 125 /* protocol constants */ 126 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 127 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 128 #define MAX_RTR_SOLICITATIONS 3 129 130 #define ND6_INFINITE_LIFETIME 0xffffffff 131 132 #ifdef _KERNEL 133 /* node constants */ 134 #define MAX_REACHABLE_TIME 3600000 /* msec */ 135 #define REACHABLE_TIME 30000 /* msec */ 136 #define RETRANS_TIMER 1000 /* msec */ 137 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 138 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 139 #define ND_COMPUTE_RTIME(x) \ 140 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 141 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 142 143 TAILQ_HEAD(nd_drhead, nd_defrouter); 144 struct nd_defrouter { 145 TAILQ_ENTRY(nd_defrouter) dr_entry; 146 struct in6_addr rtaddr; 147 u_char flags; 148 u_short rtlifetime; 149 u_long expire; 150 struct ifnet *ifp; 151 }; 152 153 struct nd_prefix { 154 struct ifnet *ndpr_ifp; 155 LIST_ENTRY(nd_prefix) ndpr_entry; 156 struct sockaddr_in6 ndpr_prefix; /* prefix */ 157 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 158 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 159 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 160 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 161 time_t ndpr_expire; /* expiration time of the prefix */ 162 time_t ndpr_preferred; /* preferred time of the prefix */ 163 struct prf_ra ndpr_flags; 164 /* list of routers that advertise the prefix: */ 165 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 166 u_char ndpr_plen; 167 struct ndpr_stateflags { 168 /* if this prefix can be regarded as on-link */ 169 u_char onlink : 1; 170 } ndpr_stateflags; 171 }; 172 173 #define ndpr_next ndpr_entry.le_next 174 175 #define ndpr_raf ndpr_flags 176 #define ndpr_raf_onlink ndpr_flags.onlink 177 #define ndpr_raf_auto ndpr_flags.autonomous 178 179 #define ndpr_statef_onlink ndpr_stateflags.onlink 180 #define ndpr_statef_addmark ndpr_stateflags.addmark 181 182 /* 183 * We keep expired prefix for certain amount of time, for validation purposes. 184 * 1800s = MaxRtrAdvInterval 185 */ 186 #define NDPR_KEEP_EXPIRED (1800 * 2) 187 188 /* 189 * Message format for use in obtaining information about prefixes 190 * from inet6 sysctl function 191 */ 192 struct inet6_ndpr_msghdr { 193 u_short inpm_msglen; /* to skip over non-understood messages */ 194 u_char inpm_version; /* future binary compatability */ 195 u_char inpm_type; /* message type */ 196 struct in6_addr inpm_prefix; 197 u_long prm_vltim; 198 u_long prm_pltime; 199 u_long prm_expire; 200 u_long prm_preferred; 201 struct in6_prflags prm_flags; 202 u_short prm_index; /* index for associated ifp */ 203 u_char prm_plen; /* length of prefix in bits */ 204 }; 205 206 #define prm_raf_onlink prm_flags.prf_ra.onlink 207 #define prm_raf_auto prm_flags.prf_ra.autonomous 208 209 #define prm_statef_onlink prm_flags.prf_state.onlink 210 211 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 212 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 213 214 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 215 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 216 217 struct nd_pfxrouter { 218 LIST_ENTRY(nd_pfxrouter) pfr_entry; 219 #define pfr_next pfr_entry.le_next 220 struct nd_defrouter *router; 221 }; 222 223 LIST_HEAD(nd_prhead, nd_prefix); 224 225 /* nd6.c */ 226 extern int nd6_prune; 227 extern int nd6_delay; 228 extern int nd6_umaxtries; 229 extern int nd6_mmaxtries; 230 extern int nd6_useloopback; 231 extern struct llinfo_nd6 llinfo_nd6; 232 extern struct nd_ifinfo *nd_ifinfo; 233 extern struct nd_drhead nd_defrouter; 234 extern struct nd_prhead nd_prefix; 235 236 extern struct callout nd6_timer_ch; 237 238 /* nd6_rtr.c */ 239 extern int nd6_defifindex; 240 241 union nd_opts { 242 struct nd_opt_hdr *nd_opt_array[9]; 243 struct { 244 struct nd_opt_hdr *zero; 245 struct nd_opt_hdr *src_lladdr; 246 struct nd_opt_hdr *tgt_lladdr; 247 struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */ 248 struct nd_opt_rd_hdr *rh; 249 struct nd_opt_mtu *mtu; 250 struct nd_opt_hdr *search; /* multiple opts */ 251 struct nd_opt_hdr *last; /* multiple opts */ 252 int done; 253 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 254 } nd_opt_each; 255 }; 256 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 257 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 258 #define nd_opts_pi nd_opt_each.pi_beg 259 #define nd_opts_pi_end nd_opt_each.pi_end 260 #define nd_opts_rh nd_opt_each.rh 261 #define nd_opts_mtu nd_opt_each.mtu 262 #define nd_opts_search nd_opt_each.search 263 #define nd_opts_last nd_opt_each.last 264 #define nd_opts_done nd_opt_each.done 265 266 /* XXX: need nd6_var.h?? */ 267 /* nd6.c */ 268 void nd6_init __P((void)); 269 void nd6_ifattach __P((struct ifnet *)); 270 int nd6_is_addr_neighbor __P((struct in6_addr *, struct ifnet *)); 271 void nd6_option_init __P((void *, int, union nd_opts *)); 272 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 273 int nd6_options __P((union nd_opts *)); 274 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 275 void nd6_setmtu __P((struct ifnet *)); 276 void nd6_timer __P((void *)); 277 void nd6_purge __P((struct ifnet *)); 278 void nd6_free __P((struct rtentry *)); 279 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *)); 280 int nd6_resolve __P((struct ifnet *, struct rtentry *, 281 struct mbuf *, struct sockaddr *, u_char *)); 282 void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 283 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 284 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 285 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 286 char *, int, int, int)); 287 /* for test */ 288 int nd6_output __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *, 289 struct rtentry *)); 290 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 291 struct sockaddr *, u_char *)); 292 293 /* nd6_nbr.c */ 294 void nd6_na_input __P((struct mbuf *, int, int)); 295 void nd6_na_output __P((struct ifnet *, struct in6_addr *, 296 struct in6_addr *, u_long, int, struct sockaddr *)); 297 void nd6_ns_input __P((struct mbuf *, int, int)); 298 void nd6_ns_output __P((struct ifnet *, struct in6_addr *, 299 struct in6_addr *, struct llinfo_nd6 *, int)); 300 caddr_t nd6_ifptomac __P((struct ifnet *)); 301 void nd6_dad_start __P((struct ifaddr *, int *)); 302 void nd6_dad_duplicated __P((struct ifaddr *)); 303 304 /* nd6_rtr.c */ 305 void nd6_rs_input __P((struct mbuf *, int, int)); 306 void nd6_ra_input __P((struct mbuf *, int, int)); 307 void prelist_del __P((struct nd_prefix *)); 308 void defrouter_addreq __P((struct nd_defrouter *)); 309 void defrouter_delreq __P((struct nd_defrouter *, int)); 310 void defrouter_select __P((void)); 311 void defrtrlist_del __P((struct nd_defrouter *)); 312 void prelist_remove __P((struct nd_prefix *)); 313 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 314 struct mbuf *)); 315 void pfxlist_onlink_check __P((void)); 316 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 317 struct ifnet *)); 318 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 319 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 320 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 321 int nd6_setdefaultiface __P((int)); 322 323 #endif /* _KERNEL */ 324 325 #endif /* _NETINET6_ND6_H_ */ 326
Indexes created Wed Sep 24 15:09:51 GMT 2025