nd6.h revision 1.6
1 /* $NetBSD: nd6.h,v 1.6 1999/12/13 15:17:23 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _NETINET6_ND6_H_ 33 #define _NETINET6_ND6_H_ 34 35 #include <sys/queue.h> 36 37 struct llinfo_nd6 { 38 struct llinfo_nd6 *ln_next; 39 struct llinfo_nd6 *ln_prev; 40 struct rtentry *ln_rt; 41 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 42 long ln_asked; /* number of queries already sent for this addr */ 43 u_long ln_expire; /* lifetime for NDP state transition */ 44 short ln_state; /* reachability state */ 45 short ln_router; /* 2^0: ND6 router bit */ 46 }; 47 48 #define ND6_LLINFO_NOSTATE -2 49 #define ND6_LLINFO_WAITDELETE -1 50 #define ND6_LLINFO_INCOMPLETE 0 51 #define ND6_LLINFO_REACHABLE 1 52 #define ND6_LLINFO_STALE 2 53 #define ND6_LLINFO_DELAY 3 54 #define ND6_LLINFO_PROBE 4 55 56 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 57 58 struct nd_ifinfo { 59 u_int32_t linkmtu; /* LinkMTU */ 60 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 61 u_int32_t basereachable; /* BaseReachableTime */ 62 u_int32_t reachable; /* Reachable Time */ 63 u_int32_t retrans; /* Retrans Timer */ 64 int recalctm; /* BaseReacable re-calculation timer */ 65 u_int8_t chlim; /* CurHopLimit */ 66 u_int8_t receivedra; 67 }; 68 69 struct in6_nbrinfo { 70 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 71 struct in6_addr addr; /* IPv6 address of the neighbor */ 72 long asked; /* number of queries already sent for this addr */ 73 int isrouter; /* if it acts as a router */ 74 int state; /* reachability state */ 75 int expire; /* lifetime for NDP state transition */ 76 }; 77 78 #define DRLSTSIZ 10 79 #define PRLSTSIZ 10 80 struct in6_drlist { 81 char ifname[IFNAMSIZ]; 82 struct { 83 struct in6_addr rtaddr; 84 u_char flags; 85 u_short rtlifetime; 86 u_long expire; 87 u_short if_index; 88 } defrouter[DRLSTSIZ]; 89 }; 90 91 struct in6_prlist { 92 char ifname[IFNAMSIZ]; 93 struct { 94 struct in6_addr prefix; 95 struct prf_ra raflags; 96 u_char prefixlen; 97 u_long vltime; 98 u_long pltime; 99 u_long expire; 100 u_short if_index; 101 u_short advrtrs; /* number of advertisement routers */ 102 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 103 } prefix[PRLSTSIZ]; 104 }; 105 106 struct in6_ndireq { 107 char ifname[IFNAMSIZ]; 108 struct nd_ifinfo ndi; 109 }; 110 111 struct in6_ndifreq { 112 char ifname[IFNAMSIZ]; 113 u_long ifindex; 114 }; 115 116 117 /* protocol constants */ 118 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 119 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 120 #define MAX_RTR_SOLICITATIONS 3 121 122 #define ND6_INFINITE_LIFETIME 0xffffffff 123 124 #ifdef _KERNEL 125 /* node constants */ 126 #define MAX_REACHABLE_TIME 3600000 /* msec */ 127 #define REACHABLE_TIME 30000 /* msec */ 128 #define RETRANS_TIMER 1000 /* msec */ 129 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 130 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 131 #define ND_COMPUTE_RTIME(x) \ 132 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 133 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 134 135 TAILQ_HEAD(nd_drhead, nd_defrouter); 136 struct nd_defrouter { 137 TAILQ_ENTRY(nd_defrouter) dr_entry; 138 struct in6_addr rtaddr; 139 u_char flags; 140 u_short rtlifetime; 141 u_long expire; 142 struct ifnet *ifp; 143 }; 144 145 struct nd_prefix { 146 struct ifnet *ndpr_ifp; 147 LIST_ENTRY(nd_prefix) ndpr_entry; 148 struct sockaddr_in6 ndpr_prefix; /* prefix */ 149 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 150 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 151 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 152 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 153 time_t ndpr_expire; /* expiration time of the prefix */ 154 time_t ndpr_preferred; /* preferred time of the prefix */ 155 struct prf_ra ndpr_flags; 156 /* list of routers that advertise the prefix: */ 157 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 158 u_char ndpr_plen; 159 struct ndpr_stateflags { 160 /* if this prefix can be regarded as on-link */ 161 u_char onlink : 1; 162 } ndpr_stateflags; 163 }; 164 165 #define ndpr_next ndpr_entry.le_next 166 167 #define ndpr_raf ndpr_flags 168 #define ndpr_raf_onlink ndpr_flags.onlink 169 #define ndpr_raf_auto ndpr_flags.autonomous 170 171 #define ndpr_statef_onlink ndpr_stateflags.onlink 172 #define ndpr_statef_addmark ndpr_stateflags.addmark 173 174 /* 175 * We keep expired prefix for certain amount of time, for validation purposes. 176 * 1800s = MaxRtrAdvInterval 177 */ 178 #define NDPR_KEEP_EXPIRED (1800 * 2) 179 180 /* 181 * Message format for use in obtaining information about prefixes 182 * from inet6 sysctl function 183 */ 184 struct inet6_ndpr_msghdr { 185 u_short inpm_msglen; /* to skip over non-understood messages */ 186 u_char inpm_version; /* future binary compatability */ 187 u_char inpm_type; /* message type */ 188 struct in6_addr inpm_prefix; 189 u_long prm_vltim; 190 u_long prm_pltime; 191 u_long prm_expire; 192 u_long prm_preferred; 193 struct in6_prflags prm_flags; 194 u_short prm_index; /* index for associated ifp */ 195 u_char prm_plen; /* length of prefix in bits */ 196 }; 197 198 #define prm_raf_onlink prm_flags.prf_ra.onlink 199 #define prm_raf_auto prm_flags.prf_ra.autonomous 200 201 #define prm_statef_onlink prm_flags.prf_state.onlink 202 203 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 204 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 205 206 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 207 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 208 209 struct nd_pfxrouter { 210 LIST_ENTRY(nd_pfxrouter) pfr_entry; 211 #define pfr_next pfr_entry.le_next 212 struct nd_defrouter *router; 213 }; 214 215 LIST_HEAD(nd_prhead, nd_prefix); 216 217 /* nd6.c */ 218 extern int nd6_prune; 219 extern int nd6_delay; 220 extern int nd6_umaxtries; 221 extern int nd6_mmaxtries; 222 extern int nd6_useloopback; 223 extern int nd6_proxyall; 224 extern struct llinfo_nd6 llinfo_nd6; 225 extern struct nd_ifinfo *nd_ifinfo; 226 extern struct nd_drhead nd_defrouter; 227 extern struct nd_prhead nd_prefix; 228 229 /* nd6_rtr.c */ 230 extern int nd6_defifindex; 231 232 union nd_opts { 233 struct nd_opt_hdr *nd_opt_array[9]; 234 struct { 235 struct nd_opt_hdr *zero; 236 struct nd_opt_hdr *src_lladdr; 237 struct nd_opt_hdr *tgt_lladdr; 238 struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */ 239 struct nd_opt_rd_hdr *rh; 240 struct nd_opt_mtu *mtu; 241 struct nd_opt_hdr *search; /* multiple opts */ 242 struct nd_opt_hdr *last; /* multiple opts */ 243 int done; 244 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 245 } nd_opt_each; 246 }; 247 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 248 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 249 #define nd_opts_pi nd_opt_each.pi_beg 250 #define nd_opts_pi_end nd_opt_each.pi_end 251 #define nd_opts_rh nd_opt_each.rh 252 #define nd_opts_mtu nd_opt_each.mtu 253 #define nd_opts_search nd_opt_each.search 254 #define nd_opts_last nd_opt_each.last 255 #define nd_opts_done nd_opt_each.done 256 257 /* XXX: need nd6_var.h?? */ 258 /* nd6.c */ 259 void nd6_init __P((void)); 260 void nd6_ifattach __P((struct ifnet *)); 261 int nd6_is_addr_neighbor __P((struct in6_addr *, struct ifnet *)); 262 void nd6_option_init __P((void *, int, union nd_opts *)); 263 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 264 int nd6_options __P((union nd_opts *)); 265 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 266 void nd6_setmtu __P((struct ifnet *)); 267 void nd6_timer __P((void *)); 268 void nd6_free __P((struct rtentry *)); 269 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *)); 270 int nd6_resolve __P((struct ifnet *, struct rtentry *, 271 struct mbuf *, struct sockaddr *, u_char *)); 272 #if defined(__bsdi__) && _BSDI_VERSION >= 199802 273 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 274 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 275 #else 276 void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 277 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 278 #endif 279 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 280 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 281 char *, int, int, int)); 282 /* for test */ 283 int nd6_output __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *, 284 struct rtentry *)); 285 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 286 struct sockaddr *, u_char *)); 287 288 /* nd6_nbr.c */ 289 void nd6_na_input __P((struct mbuf *, int, int)); 290 void nd6_na_output __P((struct ifnet *, struct in6_addr *, 291 struct in6_addr *, u_long, int)); 292 void nd6_ns_input __P((struct mbuf *, int, int)); 293 void nd6_ns_output __P((struct ifnet *, struct in6_addr *, 294 struct in6_addr *, struct llinfo_nd6 *, int)); 295 caddr_t nd6_ifptomac __P((struct ifnet *)); 296 void nd6_dad_start __P((struct ifaddr *, int *)); 297 void nd6_dad_duplicated __P((struct ifaddr *)); 298 299 /* nd6_rtr.c */ 300 void nd6_rs_input __P((struct mbuf *, int, int)); 301 void nd6_ra_input __P((struct mbuf *, int, int)); 302 void prelist_del __P((struct nd_prefix *)); 303 void defrouter_addreq __P((struct nd_defrouter *)); 304 void defrouter_delreq __P((struct nd_defrouter *, int)); 305 void defrouter_select __P((void)); 306 void defrtrlist_del __P((struct nd_defrouter *)); 307 void prelist_remove __P((struct nd_prefix *)); 308 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 309 struct mbuf *)); 310 void pfxlist_onlink_check __P((void)); 311 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 312 struct ifnet *)); 313 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 314 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 315 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 316 int nd6_setdefaultiface __P((int)); 317 318 #endif /* _KERNEL */ 319 320 #endif /* _NETINET6_ND6_H_ */ 321
Indexes created Tue Sep 23 14:10:03 GMT 2025