nd6.h revision 1.2
1 /* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _NETINET6_ND6_H_ 31 #define _NETINET6_ND6_H_ 32 33 #include <sys/queue.h> 34 35 struct llinfo_nd6 { 36 struct llinfo_nd6 *ln_next; 37 struct llinfo_nd6 *ln_prev; 38 struct rtentry *ln_rt; 39 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 40 long ln_asked; /* number of queries already sent for this addr */ 41 u_long ln_expire; /* lifetime for NDP state transition */ 42 short ln_state; /* reachability state */ 43 short ln_router; /* 2^0: ND6 router bit */ 44 }; 45 46 #define ND6_LLINFO_NOSTATE -2 47 #define ND6_LLINFO_WAITDELETE -1 48 #define ND6_LLINFO_INCOMPLETE 0 49 #define ND6_LLINFO_REACHABLE 1 50 #define ND6_LLINFO_STALE 2 51 #define ND6_LLINFO_DELAY 3 52 #define ND6_LLINFO_PROBE 4 53 54 struct nd_ifinfo { 55 u_int32_t linkmtu; /* LinkMTU */ 56 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 57 u_int32_t basereachable; /* BaseReachableTime */ 58 u_int32_t reachable; /* Reachable Time */ 59 u_int32_t retrans; /* Retrans Timer */ 60 int recalctm; /* BaseReacable re-calculation timer */ 61 u_int8_t chlim; /* CurHopLimit */ 62 u_int8_t receivedra; 63 }; 64 65 struct in6_nbrinfo { 66 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 67 struct in6_addr addr; /* IPv6 address of the neighbor */ 68 long asked; /* number of queries already sent for this addr */ 69 int isrouter; /* if it acts as a router */ 70 int state; /* reachability state */ 71 int expire; /* lifetime for NDP state transition */ 72 }; 73 74 #define DRLSTSIZ 10 75 #define PRLSTSIZ 10 76 struct in6_drlist { 77 char ifname[IFNAMSIZ]; 78 struct { 79 struct in6_addr rtaddr; 80 u_char flags; 81 u_short rtlifetime; 82 u_long expire; 83 u_short if_index; 84 } defrouter[DRLSTSIZ]; 85 }; 86 87 struct in6_prlist { 88 char ifname[IFNAMSIZ]; 89 struct { 90 struct in6_addr prefix; 91 struct prf_ra raflags; 92 u_char prefixlen; 93 u_long vltime; 94 u_long pltime; 95 u_long expire; 96 u_short if_index; 97 u_short advrtrs; /* number of advertisement routers */ 98 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 99 } prefix[PRLSTSIZ]; 100 }; 101 102 struct in6_ndireq { 103 char ifname[IFNAMSIZ]; 104 struct nd_ifinfo ndi; 105 }; 106 107 /* protocol constants */ 108 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 109 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 110 #define MAX_RTR_SOLICITATIONS 3 111 112 #define ND6_INFINITE_LIFETIME 0xffffffff 113 114 #ifdef _KERNEL 115 /* node constants */ 116 #define MAX_REACHABLE_TIME 3600000 /* msec */ 117 #define REACHABLE_TIME 30000 /* msec */ 118 #define RETRANS_TIMER 1000 /* msec */ 119 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 120 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 121 #define ND_COMPUTE_RTIME(x) \ 122 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 123 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 124 125 struct nd_defrouter { 126 LIST_ENTRY(nd_defrouter) dr_entry; 127 #define dr_next dr_entry.le_next 128 struct in6_addr rtaddr; 129 u_char flags; 130 u_short rtlifetime; 131 u_long expire; 132 struct ifnet *ifp; 133 }; 134 135 struct nd_prefix { 136 struct ifprefix ndpr_ifpr; 137 LIST_ENTRY(nd_prefix) ndpr_entry; 138 struct sockaddr_in6 ndpr_prefix; /* prefix */ 139 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 140 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 141 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 142 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 143 time_t ndpr_expire; /* expiration time of the prefix */ 144 time_t ndpr_preferred; /* preferred time of the prefix */ 145 struct in6_prflags ndpr_flags; 146 /* list of routers that advertise the prefix: */ 147 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 148 u_char ndpr_origin; /* from where this prefix info is obtained */ 149 struct ndpr_stateflags { 150 /* if this prefix can be regarded as on-link */ 151 u_char onlink : 1; 152 /* if some prefix should be added to this prefix */ 153 u_char addmark : 1; 154 u_char delmark : 1; /* if this prefix will be deleted */ 155 } ndpr_stateflags; 156 }; 157 158 #define ndpr_next ndpr_entry.le_next 159 #define ndpr_ifp ndpr_ifpr.ifpr_ifp 160 #define ndpr_plen ndpr_ifpr.ifpr_plen 161 162 #define ndpr_raf ndpr_flags.prf_ra 163 #define ndpr_raf_onlink ndpr_flags.prf_ra.onlink 164 #define ndpr_raf_auto ndpr_flags.prf_ra.autonomous 165 166 #define ndpr_statef_onlink ndpr_stateflags.onlink 167 #define ndpr_statef_addmark ndpr_stateflags.addmark 168 #define ndpr_statef_delmark ndpr_stateflags.delmark 169 170 #define ndpr_rrf ndpr_flags.prf_rr 171 #define ndpr_rrf_decrvalid ndpr_flags.prf_rr.decrvalid 172 #define ndpr_rrf_decrprefd ndpr_flags.prf_rr.decrprefd 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_drhead, nd_defrouter); 216 LIST_HEAD(nd_prhead, nd_prefix); 217 218 /* nd6.c */ 219 extern int nd6_prune; 220 extern int nd6_delay; 221 extern int nd6_umaxtries; 222 extern int nd6_mmaxtries; 223 extern int nd6_useloopback; 224 extern int nd6_proxyall; 225 extern struct llinfo_nd6 llinfo_nd6; 226 extern struct nd_ifinfo *nd_ifinfo; 227 extern struct nd_drhead nd_defrouter; 228 extern struct nd_prhead nd_prefix; 229 230 union nd_opts { 231 struct nd_opt_hdr *nd_opt_array[9]; 232 struct { 233 struct nd_opt_hdr *zero; 234 struct nd_opt_hdr *src_lladdr; 235 struct nd_opt_hdr *tgt_lladdr; 236 struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */ 237 struct nd_opt_rd_hdr *rh; 238 struct nd_opt_mtu *mtu; 239 struct nd_opt_hdr *search; /* multiple opts */ 240 struct nd_opt_hdr *last; /* multiple opts */ 241 int done; 242 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 243 } nd_opt_each; 244 }; 245 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 246 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 247 #define nd_opts_pi nd_opt_each.pi_beg 248 #define nd_opts_pi_end nd_opt_each.pi_end 249 #define nd_opts_rh nd_opt_each.rh 250 #define nd_opts_mtu nd_opt_each.mtu 251 #define nd_opts_search nd_opt_each.search 252 #define nd_opts_last nd_opt_each.last 253 #define nd_opts_done nd_opt_each.done 254 255 /* XXX: need nd6_var.h?? */ 256 /* nd6.c */ 257 void nd6_init __P((void)); 258 void nd6_ifattach __P((struct ifnet *)); 259 void nd6_option_init __P((void *, int, union nd_opts *)); 260 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 261 int nd6_options __P((union nd_opts *)); 262 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 263 void nd6_setmtu __P((struct ifnet *)); 264 void nd6_timer __P((void *)); 265 void nd6_free __P((struct rtentry *)); 266 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *)); 267 int nd6_resolve __P((struct ifnet *, struct rtentry *, 268 struct mbuf *, struct sockaddr *, u_char *)); 269 void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 270 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 271 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 272 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 273 char *, int, int)); 274 /* for test */ 275 int nd6_output __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *, 276 struct rtentry *)); 277 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 278 struct sockaddr *, u_char *)); 279 280 /* nd6_nbr.c */ 281 void nd6_na_input __P((struct mbuf *, int, int)); 282 void nd6_na_output __P((struct ifnet *, struct in6_addr *, 283 struct in6_addr *, u_long, int)); 284 void nd6_ns_input __P((struct mbuf *, int, int)); 285 void nd6_ns_output __P((struct ifnet *, struct in6_addr *, 286 struct in6_addr *, struct llinfo_nd6 *, int)); 287 caddr_t nd6_ifptomac __P((struct ifnet *)); 288 void nd6_dad_start __P((struct ifaddr *, int *)); 289 void nd6_dad_duplicated __P((struct ifaddr *)); 290 291 /* nd6_rtr.c */ 292 void nd6_rs_input __P((struct mbuf *, int, int)); 293 void nd6_ra_input __P((struct mbuf *, int, int)); 294 void prelist_del __P((struct nd_prefix *)); 295 void defrouter_addreq __P((struct nd_defrouter *)); 296 void defrouter_delreq __P((struct nd_defrouter *, int)); 297 void defrtrlist_del __P((struct nd_defrouter *)); 298 void prelist_remove __P((struct nd_prefix *)); 299 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 300 struct mbuf *)); 301 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 302 struct ifnet *)); 303 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 304 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 305 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 306 307 #endif /* _KERNEL */ 308 309 #endif /* _NETINET6_ND6_H_ */ 310
Indexes created Tue Sep 23 14:10:03 GMT 2025