nd6.c revision 1.18
1 1.18 itojun /* $NetBSD: nd6.c,v 1.18 2000/02/26 08:39:20 itojun Exp $ */ 2 1.18 itojun /* $KAME: nd6.c,v 1.41 2000/02/24 16:34:50 itojun Exp $ */ 3 1.4 thorpej 4 1.2 itojun /* 5 1.2 itojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 1.2 itojun * All rights reserved. 7 1.2 itojun * 8 1.2 itojun * Redistribution and use in source and binary forms, with or without 9 1.2 itojun * modification, are permitted provided that the following conditions 10 1.2 itojun * are met: 11 1.2 itojun * 1. Redistributions of source code must retain the above copyright 12 1.2 itojun * notice, this list of conditions and the following disclaimer. 13 1.2 itojun * 2. Redistributions in binary form must reproduce the above copyright 14 1.2 itojun * notice, this list of conditions and the following disclaimer in the 15 1.2 itojun * documentation and/or other materials provided with the distribution. 16 1.2 itojun * 3. Neither the name of the project nor the names of its contributors 17 1.2 itojun * may be used to endorse or promote products derived from this software 18 1.2 itojun * without specific prior written permission. 19 1.2 itojun * 20 1.2 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 1.2 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 1.2 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 1.2 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 1.2 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 1.2 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 1.2 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 1.2 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 1.2 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 1.2 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 1.2 itojun * SUCH DAMAGE. 31 1.2 itojun */ 32 1.2 itojun 33 1.2 itojun /* 34 1.2 itojun * XXX 35 1.2 itojun * KAME 970409 note: 36 1.2 itojun * BSD/OS version heavily modifies this code, related to llinfo. 37 1.2 itojun * Since we don't have BSD/OS version of net/route.c in our hand, 38 1.2 itojun * I left the code mostly as it was in 970310. -- itojun 39 1.2 itojun */ 40 1.2 itojun 41 1.2 itojun #include <sys/param.h> 42 1.2 itojun #include <sys/systm.h> 43 1.2 itojun #include <sys/malloc.h> 44 1.2 itojun #include <sys/mbuf.h> 45 1.2 itojun #include <sys/socket.h> 46 1.2 itojun #include <sys/sockio.h> 47 1.2 itojun #include <sys/time.h> 48 1.2 itojun #include <sys/kernel.h> 49 1.18 itojun #include <sys/protosw.h> 50 1.2 itojun #include <sys/errno.h> 51 1.2 itojun #include <sys/ioctl.h> 52 1.2 itojun #include <sys/syslog.h> 53 1.2 itojun #include <sys/queue.h> 54 1.2 itojun 55 1.2 itojun #include <net/if.h> 56 1.2 itojun #include <net/if_dl.h> 57 1.2 itojun #include <net/if_types.h> 58 1.2 itojun #include <net/if_atm.h> 59 1.2 itojun #include <net/route.h> 60 1.2 itojun 61 1.2 itojun #include <netinet/in.h> 62 1.2 itojun #include <net/if_ether.h> 63 1.2 itojun #include <netinet/if_inarp.h> 64 1.2 itojun #include <net/if_fddi.h> 65 1.2 itojun #include <netinet6/in6_var.h> 66 1.17 itojun #include <netinet/ip6.h> 67 1.2 itojun #include <netinet6/ip6_var.h> 68 1.2 itojun #include <netinet6/nd6.h> 69 1.12 itojun #include <netinet6/in6_prefix.h> 70 1.17 itojun #include <netinet/icmp6.h> 71 1.2 itojun 72 1.2 itojun #include "loop.h" 73 1.2 itojun extern struct ifnet loif[NLOOP]; 74 1.2 itojun 75 1.12 itojun #include <net/net_osdep.h> 76 1.12 itojun 77 1.2 itojun #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */ 78 1.2 itojun #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */ 79 1.2 itojun 80 1.2 itojun #define SIN6(s) ((struct sockaddr_in6 *)s) 81 1.2 itojun #define SDL(s) ((struct sockaddr_dl *)s) 82 1.2 itojun 83 1.2 itojun /* timer values */ 84 1.2 itojun int nd6_prune = 1; /* walk list every 1 seconds */ 85 1.2 itojun int nd6_delay = 5; /* delay first probe time 5 second */ 86 1.2 itojun int nd6_umaxtries = 3; /* maximum unicast query */ 87 1.2 itojun int nd6_mmaxtries = 3; /* maximum multicast query */ 88 1.2 itojun int nd6_useloopback = 1; /* use loopback interface for local traffic */ 89 1.2 itojun 90 1.12 itojun /* preventing too many loops in ND option parsing */ 91 1.12 itojun int nd6_maxndopt = 10; /* max # of ND options allowed */ 92 1.12 itojun 93 1.2 itojun /* for debugging? */ 94 1.2 itojun static int nd6_inuse, nd6_allocated; 95 1.2 itojun 96 1.2 itojun struct llinfo_nd6 llinfo_nd6 = {&llinfo_nd6, &llinfo_nd6}; 97 1.12 itojun struct nd_ifinfo *nd_ifinfo = NULL; 98 1.12 itojun struct nd_drhead nd_defrouter; 99 1.2 itojun struct nd_prhead nd_prefix = { 0 }; 100 1.2 itojun 101 1.2 itojun int nd6_recalc_reachtm_interval = ND6_RECALC_REACHTM_INTERVAL; 102 1.12 itojun static struct sockaddr_in6 all1_sa; 103 1.2 itojun 104 1.2 itojun static void nd6_slowtimo __P((void *)); 105 1.2 itojun 106 1.2 itojun void 107 1.2 itojun nd6_init() 108 1.2 itojun { 109 1.2 itojun static int nd6_init_done = 0; 110 1.12 itojun int i; 111 1.2 itojun 112 1.2 itojun if (nd6_init_done) { 113 1.2 itojun log(LOG_NOTICE, "nd6_init called more than once(ignored)\n"); 114 1.2 itojun return; 115 1.2 itojun } 116 1.12 itojun 117 1.12 itojun all1_sa.sin6_family = AF_INET6; 118 1.12 itojun all1_sa.sin6_len = sizeof(struct sockaddr_in6); 119 1.12 itojun for (i = 0; i < sizeof(all1_sa.sin6_addr); i++) 120 1.12 itojun all1_sa.sin6_addr.s6_addr[i] = 0xff; 121 1.12 itojun 122 1.12 itojun /* initialization of the default router list */ 123 1.12 itojun TAILQ_INIT(&nd_defrouter); 124 1.12 itojun 125 1.2 itojun nd6_init_done = 1; 126 1.2 itojun 127 1.2 itojun /* start timer */ 128 1.2 itojun timeout(nd6_slowtimo, (caddr_t)0, ND6_SLOWTIMER_INTERVAL * hz); 129 1.2 itojun } 130 1.2 itojun 131 1.2 itojun void 132 1.2 itojun nd6_ifattach(ifp) 133 1.2 itojun struct ifnet *ifp; 134 1.2 itojun { 135 1.2 itojun static size_t if_indexlim = 8; 136 1.2 itojun 137 1.2 itojun /* 138 1.2 itojun * We have some arrays that should be indexed by if_index. 139 1.2 itojun * since if_index will grow dynamically, they should grow too. 140 1.2 itojun */ 141 1.2 itojun if (nd_ifinfo == NULL || if_index >= if_indexlim) { 142 1.2 itojun size_t n; 143 1.2 itojun caddr_t q; 144 1.2 itojun 145 1.2 itojun while (if_index >= if_indexlim) 146 1.2 itojun if_indexlim <<= 1; 147 1.2 itojun 148 1.2 itojun /* grow nd_ifinfo */ 149 1.2 itojun n = if_indexlim * sizeof(struct nd_ifinfo); 150 1.2 itojun q = (caddr_t)malloc(n, M_IP6NDP, M_WAITOK); 151 1.2 itojun bzero(q, n); 152 1.2 itojun if (nd_ifinfo) { 153 1.2 itojun bcopy((caddr_t)nd_ifinfo, q, n/2); 154 1.2 itojun free((caddr_t)nd_ifinfo, M_IP6NDP); 155 1.2 itojun } 156 1.2 itojun nd_ifinfo = (struct nd_ifinfo *)q; 157 1.2 itojun } 158 1.2 itojun 159 1.2 itojun #define ND nd_ifinfo[ifp->if_index] 160 1.2 itojun ND.linkmtu = ifindex2ifnet[ifp->if_index]->if_mtu; 161 1.2 itojun ND.chlim = IPV6_DEFHLIM; 162 1.2 itojun ND.basereachable = REACHABLE_TIME; 163 1.2 itojun ND.reachable = ND_COMPUTE_RTIME(ND.basereachable); 164 1.2 itojun ND.retrans = RETRANS_TIMER; 165 1.2 itojun ND.receivedra = 0; 166 1.2 itojun nd6_setmtu(ifp); 167 1.2 itojun #undef ND 168 1.2 itojun } 169 1.2 itojun 170 1.2 itojun /* 171 1.2 itojun * Reset ND level link MTU. This function is called when the physical MTU 172 1.2 itojun * changes, which means we might have to adjust the ND level MTU. 173 1.2 itojun */ 174 1.2 itojun void 175 1.2 itojun nd6_setmtu(ifp) 176 1.2 itojun struct ifnet *ifp; 177 1.2 itojun { 178 1.2 itojun #define MIN(a,b) ((a) < (b) ? (a) : (b)) 179 1.2 itojun struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index]; 180 1.2 itojun u_long oldmaxmtu = ndi->maxmtu; 181 1.2 itojun u_long oldlinkmtu = ndi->linkmtu; 182 1.2 itojun 183 1.2 itojun switch(ifp->if_type) { 184 1.9 is case IFT_ARCNET: /* XXX MTU handling needs more work */ 185 1.9 is ndi->maxmtu = MIN(60480, ifp->if_mtu); 186 1.9 is break; 187 1.2 itojun case IFT_ETHER: 188 1.2 itojun ndi->maxmtu = MIN(ETHERMTU, ifp->if_mtu); 189 1.2 itojun break; 190 1.2 itojun case IFT_ATM: 191 1.2 itojun ndi->maxmtu = MIN(ATMMTU, ifp->if_mtu); 192 1.2 itojun break; 193 1.2 itojun default: 194 1.2 itojun ndi->maxmtu = ifp->if_mtu; 195 1.2 itojun break; 196 1.2 itojun } 197 1.2 itojun 198 1.2 itojun if (oldmaxmtu != ndi->maxmtu) { 199 1.2 itojun /* 200 1.2 itojun * If the ND level MTU is not set yet, or if the maxmtu 201 1.2 itojun * is reset to a smaller value than the ND level MTU, 202 1.2 itojun * also reset the ND level MTU. 203 1.2 itojun */ 204 1.2 itojun if (ndi->linkmtu == 0 || 205 1.2 itojun ndi->maxmtu < ndi->linkmtu) { 206 1.2 itojun ndi->linkmtu = ndi->maxmtu; 207 1.2 itojun /* also adjust in6_maxmtu if necessary. */ 208 1.2 itojun if (oldlinkmtu == 0) { 209 1.2 itojun /* 210 1.2 itojun * XXX: the case analysis is grotty, but 211 1.2 itojun * it is not efficient to call in6_setmaxmtu() 212 1.2 itojun * here when we are during the initialization 213 1.2 itojun * procedure. 214 1.2 itojun */ 215 1.2 itojun if (in6_maxmtu < ndi->linkmtu) 216 1.2 itojun in6_maxmtu = ndi->linkmtu; 217 1.2 itojun } 218 1.2 itojun else 219 1.2 itojun in6_setmaxmtu(); 220 1.2 itojun } 221 1.2 itojun } 222 1.2 itojun #undef MIN 223 1.2 itojun } 224 1.2 itojun 225 1.2 itojun void 226 1.2 itojun nd6_option_init(opt, icmp6len, ndopts) 227 1.2 itojun void *opt; 228 1.2 itojun int icmp6len; 229 1.2 itojun union nd_opts *ndopts; 230 1.2 itojun { 231 1.2 itojun bzero(ndopts, sizeof(*ndopts)); 232 1.2 itojun ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 233 1.2 itojun ndopts->nd_opts_last 234 1.2 itojun = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 235 1.2 itojun 236 1.2 itojun if (icmp6len == 0) { 237 1.2 itojun ndopts->nd_opts_done = 1; 238 1.2 itojun ndopts->nd_opts_search = NULL; 239 1.2 itojun } 240 1.2 itojun } 241 1.2 itojun 242 1.2 itojun /* 243 1.2 itojun * Take one ND option. 244 1.2 itojun */ 245 1.2 itojun struct nd_opt_hdr * 246 1.2 itojun nd6_option(ndopts) 247 1.2 itojun union nd_opts *ndopts; 248 1.2 itojun { 249 1.2 itojun struct nd_opt_hdr *nd_opt; 250 1.2 itojun int olen; 251 1.2 itojun 252 1.2 itojun if (!ndopts) 253 1.2 itojun panic("ndopts == NULL in nd6_option\n"); 254 1.2 itojun if (!ndopts->nd_opts_last) 255 1.2 itojun panic("uninitialized ndopts in nd6_option\n"); 256 1.2 itojun if (!ndopts->nd_opts_search) 257 1.2 itojun return NULL; 258 1.2 itojun if (ndopts->nd_opts_done) 259 1.2 itojun return NULL; 260 1.2 itojun 261 1.2 itojun nd_opt = ndopts->nd_opts_search; 262 1.2 itojun 263 1.2 itojun olen = nd_opt->nd_opt_len << 3; 264 1.2 itojun if (olen == 0) { 265 1.2 itojun /* 266 1.2 itojun * Message validation requires that all included 267 1.2 itojun * options have a length that is greater than zero. 268 1.2 itojun */ 269 1.2 itojun bzero(ndopts, sizeof(*ndopts)); 270 1.2 itojun return NULL; 271 1.2 itojun } 272 1.2 itojun 273 1.2 itojun ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 274 1.2 itojun if (!(ndopts->nd_opts_search < ndopts->nd_opts_last)) { 275 1.2 itojun ndopts->nd_opts_done = 1; 276 1.2 itojun ndopts->nd_opts_search = NULL; 277 1.2 itojun } 278 1.2 itojun return nd_opt; 279 1.2 itojun } 280 1.2 itojun 281 1.2 itojun /* 282 1.2 itojun * Parse multiple ND options. 283 1.2 itojun * This function is much easier to use, for ND routines that do not need 284 1.2 itojun * multiple options of the same type. 285 1.2 itojun */ 286 1.2 itojun int 287 1.2 itojun nd6_options(ndopts) 288 1.2 itojun union nd_opts *ndopts; 289 1.2 itojun { 290 1.2 itojun struct nd_opt_hdr *nd_opt; 291 1.2 itojun int i = 0; 292 1.2 itojun 293 1.2 itojun if (!ndopts) 294 1.2 itojun panic("ndopts == NULL in nd6_options\n"); 295 1.2 itojun if (!ndopts->nd_opts_last) 296 1.2 itojun panic("uninitialized ndopts in nd6_options\n"); 297 1.2 itojun if (!ndopts->nd_opts_search) 298 1.2 itojun return 0; 299 1.2 itojun 300 1.2 itojun while (1) { 301 1.2 itojun nd_opt = nd6_option(ndopts); 302 1.2 itojun if (!nd_opt && !ndopts->nd_opts_last) { 303 1.2 itojun /* 304 1.2 itojun * Message validation requires that all included 305 1.2 itojun * options have a length that is greater than zero. 306 1.2 itojun */ 307 1.2 itojun bzero(ndopts, sizeof(*ndopts)); 308 1.2 itojun return -1; 309 1.2 itojun } 310 1.2 itojun 311 1.2 itojun if (!nd_opt) 312 1.2 itojun goto skip1; 313 1.2 itojun 314 1.2 itojun switch (nd_opt->nd_opt_type) { 315 1.2 itojun case ND_OPT_SOURCE_LINKADDR: 316 1.2 itojun case ND_OPT_TARGET_LINKADDR: 317 1.2 itojun case ND_OPT_MTU: 318 1.2 itojun case ND_OPT_REDIRECTED_HEADER: 319 1.2 itojun if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 320 1.2 itojun printf("duplicated ND6 option found " 321 1.2 itojun "(type=%d)\n", nd_opt->nd_opt_type); 322 1.2 itojun /* XXX bark? */ 323 1.2 itojun } else { 324 1.2 itojun ndopts->nd_opt_array[nd_opt->nd_opt_type] 325 1.2 itojun = nd_opt; 326 1.2 itojun } 327 1.2 itojun break; 328 1.2 itojun case ND_OPT_PREFIX_INFORMATION: 329 1.2 itojun if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 330 1.2 itojun ndopts->nd_opt_array[nd_opt->nd_opt_type] 331 1.2 itojun = nd_opt; 332 1.2 itojun } 333 1.2 itojun ndopts->nd_opts_pi_end = 334 1.2 itojun (struct nd_opt_prefix_info *)nd_opt; 335 1.2 itojun break; 336 1.2 itojun default: 337 1.2 itojun /* 338 1.2 itojun * Unknown options must be silently ignored, 339 1.2 itojun * to accomodate future extension to the protocol. 340 1.2 itojun */ 341 1.2 itojun log(LOG_INFO, 342 1.2 itojun "nd6_options: unsupported option %d - " 343 1.2 itojun "option ignored\n", nd_opt->nd_opt_type); 344 1.2 itojun } 345 1.2 itojun 346 1.2 itojun skip1: 347 1.2 itojun i++; 348 1.12 itojun if (i > nd6_maxndopt) { 349 1.12 itojun icmp6stat.icp6s_nd_toomanyopt++; 350 1.2 itojun printf("too many loop in nd opt\n"); 351 1.2 itojun break; 352 1.2 itojun } 353 1.2 itojun 354 1.2 itojun if (ndopts->nd_opts_done) 355 1.2 itojun break; 356 1.2 itojun } 357 1.2 itojun 358 1.2 itojun return 0; 359 1.2 itojun } 360 1.2 itojun 361 1.2 itojun /* 362 1.2 itojun * ND6 timer routine to expire default route list and prefix list 363 1.2 itojun */ 364 1.2 itojun void 365 1.2 itojun nd6_timer(ignored_arg) 366 1.2 itojun void *ignored_arg; 367 1.2 itojun { 368 1.2 itojun int s; 369 1.2 itojun register struct llinfo_nd6 *ln; 370 1.2 itojun register struct nd_defrouter *dr; 371 1.2 itojun register struct nd_prefix *pr; 372 1.12 itojun long time_second = time.tv_sec; 373 1.2 itojun 374 1.5 itojun s = splsoftnet(); 375 1.2 itojun timeout(nd6_timer, (caddr_t)0, nd6_prune * hz); 376 1.2 itojun 377 1.2 itojun ln = llinfo_nd6.ln_next; 378 1.2 itojun /* XXX BSD/OS separates this code -- itojun */ 379 1.2 itojun while (ln && ln != &llinfo_nd6) { 380 1.2 itojun struct rtentry *rt; 381 1.2 itojun struct ifnet *ifp; 382 1.2 itojun struct sockaddr_in6 *dst; 383 1.2 itojun struct llinfo_nd6 *next = ln->ln_next; 384 1.2 itojun 385 1.2 itojun if ((rt = ln->ln_rt) == NULL) { 386 1.2 itojun ln = next; 387 1.2 itojun continue; 388 1.2 itojun } 389 1.2 itojun if ((ifp = rt->rt_ifp) == NULL) { 390 1.2 itojun ln = next; 391 1.2 itojun continue; 392 1.2 itojun } 393 1.2 itojun dst = (struct sockaddr_in6 *)rt_key(rt); 394 1.2 itojun 395 1.2 itojun if (ln->ln_expire > time_second) { 396 1.2 itojun ln = next; 397 1.2 itojun continue; 398 1.2 itojun } 399 1.2 itojun 400 1.2 itojun /* sanity check */ 401 1.2 itojun if (!rt) 402 1.2 itojun panic("rt=0 in nd6_timer(ln=%p)\n", ln); 403 1.2 itojun if (!dst) 404 1.2 itojun panic("dst=0 in nd6_timer(ln=%p)\n", ln); 405 1.2 itojun 406 1.2 itojun switch (ln->ln_state) { 407 1.2 itojun case ND6_LLINFO_INCOMPLETE: 408 1.2 itojun if (ln->ln_asked < nd6_mmaxtries) { 409 1.2 itojun ln->ln_asked++; 410 1.2 itojun ln->ln_expire = time_second + 411 1.2 itojun nd_ifinfo[ifp->if_index].retrans / 1000; 412 1.2 itojun nd6_ns_output(ifp, NULL, &dst->sin6_addr, 413 1.2 itojun ln, 0); 414 1.2 itojun } else { 415 1.2 itojun struct mbuf *m = ln->ln_hold; 416 1.2 itojun if (m) { 417 1.2 itojun if (rt->rt_ifp) { 418 1.2 itojun /* 419 1.2 itojun * Fake rcvif to make ICMP error 420 1.2 itojun * more helpful in diagnosing 421 1.2 itojun * for the receiver. 422 1.2 itojun * XXX: should we consider 423 1.2 itojun * older rcvif? 424 1.2 itojun */ 425 1.2 itojun m->m_pkthdr.rcvif = rt->rt_ifp; 426 1.2 itojun } 427 1.2 itojun icmp6_error(m, ICMP6_DST_UNREACH, 428 1.2 itojun ICMP6_DST_UNREACH_ADDR, 0); 429 1.2 itojun ln->ln_hold = NULL; 430 1.2 itojun } 431 1.2 itojun nd6_free(rt); 432 1.2 itojun } 433 1.2 itojun break; 434 1.2 itojun case ND6_LLINFO_REACHABLE: 435 1.18 itojun if (ln->ln_expire) 436 1.2 itojun ln->ln_state = ND6_LLINFO_STALE; 437 1.2 itojun break; 438 1.2 itojun /* 439 1.2 itojun * ND6_LLINFO_STALE state requires nothing for timer 440 1.2 itojun * routine. 441 1.2 itojun */ 442 1.2 itojun case ND6_LLINFO_DELAY: 443 1.2 itojun ln->ln_asked = 1; 444 1.2 itojun ln->ln_state = ND6_LLINFO_PROBE; 445 1.2 itojun ln->ln_expire = time_second + 446 1.2 itojun nd_ifinfo[ifp->if_index].retrans / 1000; 447 1.2 itojun nd6_ns_output(ifp, &dst->sin6_addr, &dst->sin6_addr, 448 1.2 itojun ln, 0); 449 1.2 itojun break; 450 1.2 itojun 451 1.2 itojun case ND6_LLINFO_PROBE: 452 1.2 itojun if (ln->ln_asked < nd6_umaxtries) { 453 1.2 itojun ln->ln_asked++; 454 1.2 itojun ln->ln_expire = time_second + 455 1.2 itojun nd_ifinfo[ifp->if_index].retrans / 1000; 456 1.2 itojun nd6_ns_output(ifp, &dst->sin6_addr, 457 1.2 itojun &dst->sin6_addr, ln, 0); 458 1.2 itojun } else { 459 1.2 itojun nd6_free(rt); 460 1.2 itojun } 461 1.2 itojun break; 462 1.2 itojun case ND6_LLINFO_WAITDELETE: 463 1.2 itojun nd6_free(rt); 464 1.2 itojun break; 465 1.2 itojun } 466 1.2 itojun ln = next; 467 1.2 itojun } 468 1.2 itojun 469 1.2 itojun /* expire */ 470 1.12 itojun dr = TAILQ_FIRST(&nd_defrouter); 471 1.2 itojun while (dr) { 472 1.2 itojun if (dr->expire && dr->expire < time_second) { 473 1.2 itojun struct nd_defrouter *t; 474 1.12 itojun t = TAILQ_NEXT(dr, dr_entry); 475 1.2 itojun defrtrlist_del(dr); 476 1.2 itojun dr = t; 477 1.2 itojun } else 478 1.12 itojun dr = TAILQ_NEXT(dr, dr_entry); 479 1.2 itojun } 480 1.2 itojun pr = nd_prefix.lh_first; 481 1.2 itojun while (pr) { 482 1.2 itojun struct in6_ifaddr *ia6; 483 1.2 itojun struct in6_addrlifetime *lt6; 484 1.2 itojun 485 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr)) 486 1.2 itojun ia6 = NULL; 487 1.2 itojun else 488 1.2 itojun ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr); 489 1.2 itojun 490 1.2 itojun if (ia6) { 491 1.2 itojun /* check address lifetime */ 492 1.2 itojun lt6 = &ia6->ia6_lifetime; 493 1.2 itojun if (lt6->ia6t_preferred && lt6->ia6t_preferred < time_second) 494 1.2 itojun ia6->ia6_flags |= IN6_IFF_DEPRECATED; 495 1.2 itojun if (lt6->ia6t_expire && lt6->ia6t_expire < time_second) { 496 1.2 itojun if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr)) 497 1.2 itojun in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr); 498 1.2 itojun /* xxx ND_OPT_PI_FLAG_ONLINK processing */ 499 1.2 itojun } 500 1.2 itojun } 501 1.2 itojun 502 1.2 itojun /* 503 1.2 itojun * check prefix lifetime. 504 1.2 itojun * since pltime is just for autoconf, pltime processing for 505 1.2 itojun * prefix is not necessary. 506 1.2 itojun * 507 1.2 itojun * we offset expire time by NDPR_KEEP_EXPIRE, so that we 508 1.2 itojun * can use the old prefix information to validate the 509 1.2 itojun * next prefix information to come. See prelist_update() 510 1.2 itojun * for actual validation. 511 1.2 itojun */ 512 1.2 itojun if (pr->ndpr_expire 513 1.2 itojun && pr->ndpr_expire + NDPR_KEEP_EXPIRED < time_second) { 514 1.2 itojun struct nd_prefix *t; 515 1.2 itojun t = pr->ndpr_next; 516 1.2 itojun 517 1.2 itojun /* 518 1.2 itojun * address expiration and prefix expiration are 519 1.2 itojun * separate. NEVER perform in6_ifdel here. 520 1.2 itojun */ 521 1.2 itojun 522 1.2 itojun prelist_remove(pr); 523 1.2 itojun pr = t; 524 1.2 itojun } else 525 1.2 itojun pr = pr->ndpr_next; 526 1.2 itojun } 527 1.2 itojun splx(s); 528 1.16 itojun } 529 1.16 itojun 530 1.16 itojun /* 531 1.16 itojun * Nuke neighbor cache/prefix/default router management table, right before 532 1.16 itojun * ifp goes away. 533 1.16 itojun */ 534 1.16 itojun void 535 1.16 itojun nd6_purge(ifp) 536 1.16 itojun struct ifnet *ifp; 537 1.16 itojun { 538 1.16 itojun struct llinfo_nd6 *ln, *nln; 539 1.16 itojun struct nd_defrouter *dr, *ndr, drany; 540 1.16 itojun struct nd_prefix *pr, *npr; 541 1.16 itojun 542 1.16 itojun /* Nuke default router list entries toward ifp */ 543 1.16 itojun if ((dr = TAILQ_FIRST(&nd_defrouter)) != NULL) { 544 1.16 itojun /* 545 1.16 itojun * The first entry of the list may be stored in 546 1.16 itojun * the routing table, so we'll delete it later. 547 1.16 itojun */ 548 1.16 itojun for (dr = TAILQ_NEXT(dr, dr_entry); dr; dr = ndr) { 549 1.16 itojun ndr = TAILQ_NEXT(dr, dr_entry); 550 1.16 itojun if (dr->ifp == ifp) 551 1.16 itojun defrtrlist_del(dr); 552 1.16 itojun } 553 1.16 itojun dr = TAILQ_FIRST(&nd_defrouter); 554 1.16 itojun if (dr->ifp == ifp) 555 1.16 itojun defrtrlist_del(dr); 556 1.16 itojun } 557 1.16 itojun 558 1.16 itojun /* Nuke prefix list entries toward ifp */ 559 1.16 itojun for (pr = nd_prefix.lh_first; pr; pr = npr) { 560 1.16 itojun npr = pr->ndpr_next; 561 1.16 itojun if (pr->ndpr_ifp == ifp) { 562 1.16 itojun if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr)) 563 1.16 itojun in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr); 564 1.16 itojun prelist_remove(pr); 565 1.16 itojun } 566 1.16 itojun } 567 1.16 itojun 568 1.16 itojun /* cancel default outgoing interface setting */ 569 1.16 itojun if (nd6_defifindex == ifp->if_index) 570 1.16 itojun nd6_setdefaultiface(0); 571 1.16 itojun 572 1.16 itojun /* refresh default router list */ 573 1.16 itojun bzero(&drany, sizeof(drany)); 574 1.16 itojun defrouter_delreq(&drany, 0); 575 1.16 itojun defrouter_select(); 576 1.16 itojun 577 1.16 itojun /* 578 1.16 itojun * Nuke neighbor cache entries for the ifp. 579 1.16 itojun * Note that rt->rt_ifp may not be the same as ifp, 580 1.16 itojun * due to KAME goto ours hack. See RTM_RESOLVE case in 581 1.18 itojun * nd6_rtrequest(), and ip6_input(). 582 1.16 itojun */ 583 1.16 itojun ln = llinfo_nd6.ln_next; 584 1.16 itojun while (ln && ln != &llinfo_nd6) { 585 1.16 itojun struct rtentry *rt; 586 1.16 itojun struct sockaddr_dl *sdl; 587 1.16 itojun 588 1.16 itojun nln = ln->ln_next; 589 1.16 itojun rt = ln->ln_rt; 590 1.16 itojun if (rt && rt->rt_gateway && 591 1.16 itojun rt->rt_gateway->sa_family == AF_LINK) { 592 1.16 itojun sdl = (struct sockaddr_dl *)rt->rt_gateway; 593 1.16 itojun if (sdl->sdl_index == ifp->if_index) 594 1.16 itojun nd6_free(rt); 595 1.16 itojun } 596 1.16 itojun ln = nln; 597 1.16 itojun } 598 1.16 itojun 599 1.16 itojun /* 600 1.18 itojun * Neighbor cache entry for interface route will be retained 601 1.18 itojun * with ND6_LLINFO_WAITDELETE state, by nd6_free(). Nuke it. 602 1.16 itojun */ 603 1.16 itojun ln = llinfo_nd6.ln_next; 604 1.16 itojun while (ln && ln != &llinfo_nd6) { 605 1.16 itojun struct rtentry *rt; 606 1.16 itojun struct sockaddr_dl *sdl; 607 1.16 itojun 608 1.16 itojun nln = ln->ln_next; 609 1.16 itojun rt = ln->ln_rt; 610 1.16 itojun if (rt && rt->rt_gateway && 611 1.16 itojun rt->rt_gateway->sa_family == AF_LINK) { 612 1.16 itojun sdl = (struct sockaddr_dl *)rt->rt_gateway; 613 1.16 itojun if (sdl->sdl_index == ifp->if_index) { 614 1.16 itojun rtrequest(RTM_DELETE, rt_key(rt), 615 1.16 itojun (struct sockaddr *)0, rt_mask(rt), 0, 616 1.16 itojun (struct rtentry **)0); 617 1.16 itojun } 618 1.16 itojun } 619 1.16 itojun ln = nln; 620 1.16 itojun } 621 1.2 itojun } 622 1.2 itojun 623 1.2 itojun struct rtentry * 624 1.2 itojun nd6_lookup(addr6, create, ifp) 625 1.2 itojun struct in6_addr *addr6; 626 1.2 itojun int create; 627 1.2 itojun struct ifnet *ifp; 628 1.2 itojun { 629 1.2 itojun struct rtentry *rt; 630 1.2 itojun struct sockaddr_in6 sin6; 631 1.2 itojun 632 1.2 itojun bzero(&sin6, sizeof(sin6)); 633 1.2 itojun sin6.sin6_len = sizeof(struct sockaddr_in6); 634 1.2 itojun sin6.sin6_family = AF_INET6; 635 1.2 itojun sin6.sin6_addr = *addr6; 636 1.13 itojun rt = rtalloc1((struct sockaddr *)&sin6, create); 637 1.2 itojun if (rt && (rt->rt_flags & RTF_LLINFO) == 0) { 638 1.2 itojun /* 639 1.2 itojun * This is the case for the default route. 640 1.2 itojun * If we want to create a neighbor cache for the address, we 641 1.2 itojun * should free the route for the destination and allocate an 642 1.2 itojun * interface route. 643 1.2 itojun */ 644 1.2 itojun if (create) { 645 1.2 itojun RTFREE(rt); 646 1.2 itojun rt = 0; 647 1.2 itojun } 648 1.2 itojun } 649 1.2 itojun if (!rt) { 650 1.2 itojun if (create && ifp) { 651 1.2 itojun /* 652 1.2 itojun * If no route is available and create is set, 653 1.2 itojun * we allocate a host route for the destination 654 1.2 itojun * and treat it like an interface route. 655 1.2 itojun * This hack is necessary for a neighbor which can't 656 1.2 itojun * be covered by our own prefix. 657 1.2 itojun */ 658 1.2 itojun struct ifaddr *ifa = 659 1.2 itojun ifaof_ifpforaddr((struct sockaddr *)&sin6, ifp); 660 1.2 itojun if (ifa == NULL) 661 1.2 itojun return(NULL); 662 1.2 itojun 663 1.2 itojun /* 664 1.2 itojun * Create a new route. RTF_LLINFO is necessary 665 1.2 itojun * to create a Neighbor Cache entry for the 666 1.2 itojun * destination in nd6_rtrequest which will be 667 1.2 itojun * called in rtequest via ifa->ifa_rtrequest. 668 1.2 itojun */ 669 1.2 itojun if (rtrequest(RTM_ADD, (struct sockaddr *)&sin6, 670 1.2 itojun ifa->ifa_addr, 671 1.2 itojun (struct sockaddr *)&all1_sa, 672 1.2 itojun (ifa->ifa_flags | 673 1.2 itojun RTF_HOST | RTF_LLINFO) & ~RTF_CLONING, 674 1.2 itojun &rt)) 675 1.2 itojun log(LOG_ERR, 676 1.2 itojun "nd6_lookup: failed to add route for a " 677 1.2 itojun "neighbor(%s)\n", ip6_sprintf(addr6)); 678 1.2 itojun if (rt == NULL) 679 1.2 itojun return(NULL); 680 1.2 itojun if (rt->rt_llinfo) { 681 1.2 itojun struct llinfo_nd6 *ln = 682 1.2 itojun (struct llinfo_nd6 *)rt->rt_llinfo; 683 1.2 itojun ln->ln_state = ND6_LLINFO_NOSTATE; 684 1.2 itojun } 685 1.2 itojun } 686 1.2 itojun else 687 1.2 itojun return(NULL); 688 1.2 itojun } 689 1.2 itojun rt->rt_refcnt--; 690 1.12 itojun /* 691 1.12 itojun * Validation for the entry. 692 1.12 itojun * XXX: we can't use rt->rt_ifp to check for the interface, since 693 1.12 itojun * it might be the loopback interface if the entry is for our 694 1.12 itojun * own address on a non-loopback interface. Instead, we should 695 1.12 itojun * use rt->rt_ifa->ifa_ifp, which would specify the REAL interface. 696 1.12 itojun */ 697 1.2 itojun if ((rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 || 698 1.12 itojun rt->rt_gateway->sa_family != AF_LINK || 699 1.12 itojun (ifp && rt->rt_ifa->ifa_ifp != ifp)) { 700 1.2 itojun if (create) { 701 1.12 itojun log(LOG_DEBUG, "nd6_lookup: failed to lookup %s (if = %s)\n", 702 1.12 itojun ip6_sprintf(addr6), ifp ? if_name(ifp) : "unspec"); 703 1.2 itojun /* xxx more logs... kazu */ 704 1.2 itojun } 705 1.2 itojun return(0); 706 1.2 itojun } 707 1.2 itojun return(rt); 708 1.6 itojun } 709 1.6 itojun 710 1.6 itojun /* 711 1.6 itojun * Detect if a given IPv6 address identifies a neighbor on a given link. 712 1.6 itojun * XXX: should take care of the destination of a p2p link? 713 1.6 itojun */ 714 1.6 itojun int 715 1.6 itojun nd6_is_addr_neighbor(addr, ifp) 716 1.6 itojun struct in6_addr *addr; 717 1.6 itojun struct ifnet *ifp; 718 1.6 itojun { 719 1.6 itojun register struct ifaddr *ifa; 720 1.6 itojun int i; 721 1.6 itojun 722 1.6 itojun #define IFADDR6(a) ((((struct in6_ifaddr *)(a))->ia_addr).sin6_addr) 723 1.6 itojun #define IFMASK6(a) ((((struct in6_ifaddr *)(a))->ia_prefixmask).sin6_addr) 724 1.6 itojun 725 1.6 itojun /* A link-local address is always a neighbor. */ 726 1.6 itojun if (IN6_IS_ADDR_LINKLOCAL(addr)) 727 1.6 itojun return(1); 728 1.6 itojun 729 1.6 itojun /* 730 1.6 itojun * If the address matches one of our addresses, 731 1.6 itojun * it should be a neighbor. 732 1.6 itojun */ 733 1.6 itojun for (ifa = ifp->if_addrlist.tqh_first; 734 1.6 itojun ifa; 735 1.6 itojun ifa = ifa->ifa_list.tqe_next) 736 1.6 itojun { 737 1.6 itojun if (ifa->ifa_addr->sa_family != AF_INET6) 738 1.6 itojun next: continue; 739 1.6 itojun 740 1.6 itojun for (i = 0; i < 4; i++) { 741 1.6 itojun if ((IFADDR6(ifa).s6_addr32[i] ^ addr->s6_addr32[i]) & 742 1.6 itojun IFMASK6(ifa).s6_addr32[i]) 743 1.6 itojun goto next; 744 1.6 itojun } 745 1.6 itojun return(1); 746 1.6 itojun } 747 1.6 itojun 748 1.6 itojun /* 749 1.6 itojun * Even if the address matches none of our addresses, it might be 750 1.6 itojun * in the neighbor cache. 751 1.6 itojun */ 752 1.6 itojun if (nd6_lookup(addr, 0, ifp)) 753 1.6 itojun return(1); 754 1.6 itojun 755 1.6 itojun return(0); 756 1.6 itojun #undef IFADDR6 757 1.6 itojun #undef IFMASK6 758 1.2 itojun } 759 1.2 itojun 760 1.2 itojun /* 761 1.2 itojun * Free an nd6 llinfo entry. 762 1.2 itojun */ 763 1.2 itojun void 764 1.2 itojun nd6_free(rt) 765 1.2 itojun struct rtentry *rt; 766 1.2 itojun { 767 1.2 itojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo; 768 1.2 itojun struct sockaddr_dl *sdl; 769 1.12 itojun struct in6_addr in6 = ((struct sockaddr_in6 *)rt_key(rt))->sin6_addr; 770 1.12 itojun struct nd_defrouter *dr; 771 1.2 itojun 772 1.18 itojun /* 773 1.18 itojun * Clear all destination cache entries for the neighbor. 774 1.18 itojun * XXX: is it better to restrict this to hosts? 775 1.18 itojun */ 776 1.18 itojun pfctlinput(PRC_HOSTDEAD, rt_key(rt)); 777 1.18 itojun 778 1.12 itojun if (!ip6_forwarding && ip6_accept_rtadv) { /* XXX: too restrictive? */ 779 1.2 itojun int s; 780 1.18 itojun #ifdef __NetBSD__ 781 1.5 itojun s = splsoftnet(); 782 1.18 itojun #else 783 1.18 itojun s = splnet(); 784 1.18 itojun #endif 785 1.12 itojun dr = defrouter_lookup(&((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 786 1.2 itojun rt->rt_ifp); 787 1.12 itojun if (ln->ln_router || dr) { 788 1.12 itojun /* 789 1.12 itojun * rt6_flush must be called whether or not the neighbor 790 1.12 itojun * is in the Default Router List. 791 1.12 itojun * See a corresponding comment in nd6_na_input(). 792 1.12 itojun */ 793 1.12 itojun rt6_flush(&in6, rt->rt_ifp); 794 1.12 itojun } 795 1.12 itojun 796 1.12 itojun if (dr) { 797 1.12 itojun /* 798 1.12 itojun * Unreachablity of a router might affect the default 799 1.12 itojun * router selection and on-link detection of advertised 800 1.12 itojun * prefixes. 801 1.12 itojun */ 802 1.12 itojun 803 1.2 itojun /* 804 1.12 itojun * Temporarily fake the state to choose a new default 805 1.12 itojun * router and to perform on-link determination of 806 1.12 itojun * prefixes coreectly. 807 1.12 itojun * Below the state will be set correctly, 808 1.12 itojun * or the entry itself will be deleted. 809 1.2 itojun */ 810 1.12 itojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 811 1.12 itojun 812 1.12 itojun if (dr == TAILQ_FIRST(&nd_defrouter)) { 813 1.12 itojun /* 814 1.12 itojun * It is used as the current default router, 815 1.12 itojun * so we have to move it to the end of the 816 1.12 itojun * list and choose a new one. 817 1.12 itojun * XXX: it is not very efficient if this is 818 1.12 itojun * the only router. 819 1.12 itojun */ 820 1.12 itojun TAILQ_REMOVE(&nd_defrouter, dr, dr_entry); 821 1.12 itojun TAILQ_INSERT_TAIL(&nd_defrouter, dr, dr_entry); 822 1.12 itojun 823 1.12 itojun defrouter_select(); 824 1.12 itojun } 825 1.12 itojun pfxlist_onlink_check(); 826 1.2 itojun } 827 1.2 itojun splx(s); 828 1.2 itojun } 829 1.12 itojun 830 1.2 itojun if (rt->rt_refcnt > 0 && (sdl = SDL(rt->rt_gateway)) && 831 1.12 itojun sdl->sdl_family == AF_LINK) { 832 1.2 itojun sdl->sdl_alen = 0; 833 1.2 itojun ln->ln_state = ND6_LLINFO_WAITDELETE; 834 1.2 itojun ln->ln_asked = 0; 835 1.2 itojun rt->rt_flags &= ~RTF_REJECT; 836 1.2 itojun return; 837 1.2 itojun } 838 1.12 itojun 839 1.12 itojun rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0, 840 1.12 itojun rt_mask(rt), 0, (struct rtentry **)0); 841 1.2 itojun } 842 1.2 itojun 843 1.2 itojun /* 844 1.2 itojun * Upper-layer reachability hint for Neighbor Unreachability Detection. 845 1.2 itojun * 846 1.2 itojun * XXX cost-effective metods? 847 1.2 itojun */ 848 1.2 itojun void 849 1.2 itojun nd6_nud_hint(rt, dst6) 850 1.2 itojun struct rtentry *rt; 851 1.2 itojun struct in6_addr *dst6; 852 1.2 itojun { 853 1.2 itojun struct llinfo_nd6 *ln; 854 1.12 itojun long time_second = time.tv_sec; 855 1.2 itojun 856 1.2 itojun /* 857 1.2 itojun * If the caller specified "rt", use that. Otherwise, resolve the 858 1.2 itojun * routing table by supplied "dst6". 859 1.2 itojun */ 860 1.2 itojun if (!rt) { 861 1.2 itojun if (!dst6) 862 1.2 itojun return; 863 1.2 itojun if (!(rt = nd6_lookup(dst6, 0, NULL))) 864 1.2 itojun return; 865 1.2 itojun } 866 1.2 itojun 867 1.2 itojun if ((rt->rt_flags & RTF_GATEWAY) 868 1.2 itojun || (rt->rt_flags & RTF_LLINFO) == 0 869 1.2 itojun || !rt->rt_llinfo 870 1.2 itojun || !rt->rt_gateway 871 1.2 itojun || rt->rt_gateway->sa_family != AF_LINK) { 872 1.2 itojun /* This is not a host route. */ 873 1.2 itojun return; 874 1.2 itojun } 875 1.2 itojun 876 1.2 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 877 1.2 itojun if (ln->ln_state == ND6_LLINFO_INCOMPLETE) 878 1.2 itojun return; 879 1.2 itojun 880 1.2 itojun ln->ln_state = ND6_LLINFO_REACHABLE; 881 1.2 itojun if (ln->ln_expire) 882 1.2 itojun ln->ln_expire = time_second + 883 1.2 itojun nd_ifinfo[rt->rt_ifp->if_index].reachable; 884 1.2 itojun } 885 1.2 itojun 886 1.12 itojun #ifdef OLDIP6OUTPUT 887 1.2 itojun /* 888 1.2 itojun * Resolve an IP6 address into an ethernet address. If success, 889 1.2 itojun * desten is filled in. If there is no entry in ndptab, 890 1.2 itojun * set one up and multicast a solicitation for the IP6 address. 891 1.2 itojun * Hold onto this mbuf and resend it once the address 892 1.2 itojun * is finally resolved. A return value of 1 indicates 893 1.2 itojun * that desten has been filled in and the packet should be sent 894 1.2 itojun * normally; a 0 return indicates that the packet has been 895 1.2 itojun * taken over here, either now or for later transmission. 896 1.2 itojun */ 897 1.2 itojun int 898 1.2 itojun nd6_resolve(ifp, rt, m, dst, desten) 899 1.2 itojun struct ifnet *ifp; 900 1.2 itojun struct rtentry *rt; 901 1.2 itojun struct mbuf *m; 902 1.2 itojun struct sockaddr *dst; 903 1.2 itojun u_char *desten; 904 1.2 itojun { 905 1.2 itojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)NULL; 906 1.2 itojun struct sockaddr_dl *sdl; 907 1.12 itojun long time_second = time.tv_sec; 908 1.2 itojun 909 1.2 itojun if (m->m_flags & M_MCAST) { 910 1.2 itojun switch (ifp->if_type) { 911 1.2 itojun case IFT_ETHER: 912 1.2 itojun case IFT_FDDI: 913 1.2 itojun ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr, 914 1.2 itojun desten); 915 1.2 itojun return(1); 916 1.2 itojun break; 917 1.9 is case IFT_ARCNET: 918 1.9 is *desten = 0; 919 1.9 is return(1); 920 1.12 itojun break; 921 1.2 itojun default: 922 1.2 itojun return(0); 923 1.2 itojun } 924 1.2 itojun } 925 1.2 itojun if (rt && (rt->rt_flags & RTF_LLINFO) != 0) 926 1.2 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 927 1.2 itojun else { 928 1.2 itojun if ((rt = nd6_lookup(&(SIN6(dst)->sin6_addr), 1, ifp)) != NULL) 929 1.2 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 930 1.2 itojun } 931 1.2 itojun if (!ln || !rt) { 932 1.2 itojun log(LOG_DEBUG, "nd6_resolve: can't allocate llinfo for %s\n", 933 1.2 itojun ip6_sprintf(&(SIN6(dst)->sin6_addr))); 934 1.2 itojun m_freem(m); 935 1.2 itojun return(0); 936 1.2 itojun } 937 1.2 itojun sdl = SDL(rt->rt_gateway); 938 1.2 itojun /* 939 1.2 itojun * Ckeck the address family and length is valid, the address 940 1.2 itojun * is resolved; otherwise, try to resolve. 941 1.2 itojun */ 942 1.2 itojun if (ln->ln_state >= ND6_LLINFO_REACHABLE 943 1.2 itojun && sdl->sdl_family == AF_LINK 944 1.2 itojun && sdl->sdl_alen != 0) { 945 1.2 itojun bcopy(LLADDR(sdl), desten, sdl->sdl_alen); 946 1.2 itojun if (ln->ln_state == ND6_LLINFO_STALE) { 947 1.2 itojun ln->ln_asked = 0; 948 1.2 itojun ln->ln_state = ND6_LLINFO_DELAY; 949 1.2 itojun ln->ln_expire = time_second + nd6_delay; 950 1.2 itojun } 951 1.2 itojun return(1); 952 1.2 itojun } 953 1.2 itojun /* 954 1.2 itojun * There is an ndp entry, but no ethernet address 955 1.2 itojun * response yet. Replace the held mbuf with this 956 1.2 itojun * latest one. 957 1.2 itojun * 958 1.2 itojun * XXX Does the code conform to rate-limiting rule? 959 1.2 itojun * (RFC 2461 7.2.2) 960 1.2 itojun */ 961 1.2 itojun if (ln->ln_state == ND6_LLINFO_WAITDELETE || 962 1.2 itojun ln->ln_state == ND6_LLINFO_NOSTATE) 963 1.2 itojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 964 1.2 itojun if (ln->ln_hold) 965 1.2 itojun m_freem(ln->ln_hold); 966 1.2 itojun ln->ln_hold = m; 967 1.2 itojun if (ln->ln_expire) { 968 1.2 itojun rt->rt_flags &= ~RTF_REJECT; 969 1.2 itojun if (ln->ln_asked < nd6_mmaxtries && 970 1.2 itojun ln->ln_expire < time_second) { 971 1.2 itojun ln->ln_asked++; 972 1.2 itojun ln->ln_expire = time_second + 973 1.2 itojun nd_ifinfo[ifp->if_index].retrans / 1000; 974 1.2 itojun nd6_ns_output(ifp, NULL, &(SIN6(dst)->sin6_addr), 975 1.2 itojun ln, 0); 976 1.2 itojun } 977 1.2 itojun } 978 1.2 itojun return(0); 979 1.2 itojun } 980 1.12 itojun #endif /* OLDIP6OUTPUT */ 981 1.2 itojun 982 1.2 itojun void 983 1.2 itojun nd6_rtrequest(req, rt, sa) 984 1.2 itojun int req; 985 1.2 itojun struct rtentry *rt; 986 1.2 itojun struct sockaddr *sa; /* xxx unused */ 987 1.2 itojun { 988 1.2 itojun struct sockaddr *gate = rt->rt_gateway; 989 1.2 itojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo; 990 1.2 itojun static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 991 1.2 itojun struct ifnet *ifp = rt->rt_ifp; 992 1.2 itojun struct ifaddr *ifa; 993 1.12 itojun long time_second = time.tv_sec; 994 1.2 itojun 995 1.2 itojun if (rt->rt_flags & RTF_GATEWAY) 996 1.2 itojun return; 997 1.2 itojun 998 1.2 itojun switch (req) { 999 1.2 itojun case RTM_ADD: 1000 1.2 itojun /* 1001 1.2 itojun * There is no backward compatibility :) 1002 1.2 itojun * 1003 1.2 itojun * if ((rt->rt_flags & RTF_HOST) == 0 && 1004 1.2 itojun * SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff) 1005 1.2 itojun * rt->rt_flags |= RTF_CLONING; 1006 1.2 itojun */ 1007 1.18 itojun if (rt->rt_flags & (RTF_CLONING | RTF_LLINFO)) { 1008 1.2 itojun /* 1009 1.2 itojun * Case 1: This route should come from 1010 1.2 itojun * a route to interface. RTF_LLINFO flag is set 1011 1.2 itojun * for a host route whose destination should be 1012 1.2 itojun * treated as on-link. 1013 1.2 itojun */ 1014 1.2 itojun rt_setgate(rt, rt_key(rt), 1015 1.2 itojun (struct sockaddr *)&null_sdl); 1016 1.2 itojun gate = rt->rt_gateway; 1017 1.2 itojun SDL(gate)->sdl_type = ifp->if_type; 1018 1.2 itojun SDL(gate)->sdl_index = ifp->if_index; 1019 1.2 itojun if (ln) 1020 1.2 itojun ln->ln_expire = time_second; 1021 1.2 itojun #if 1 1022 1.2 itojun if (ln && ln->ln_expire == 0) { 1023 1.2 itojun /* cludge for desktops */ 1024 1.2 itojun #if 0 1025 1.2 itojun printf("nd6_request: time.tv_sec is zero; " 1026 1.2 itojun "treat it as 1\n"); 1027 1.2 itojun #endif 1028 1.2 itojun ln->ln_expire = 1; 1029 1.2 itojun } 1030 1.2 itojun #endif 1031 1.2 itojun if (rt->rt_flags & RTF_CLONING) 1032 1.2 itojun break; 1033 1.2 itojun } 1034 1.18 itojun /* 1035 1.18 itojun * In IPv4 code, we try to annonuce new RTF_ANNOUNCE entry here. 1036 1.18 itojun * We don't do that here since llinfo is not ready yet. 1037 1.18 itojun * 1038 1.18 itojun * There are also couple of other things to be discussed: 1039 1.18 itojun * - unsolicited NA code needs improvement beforehand 1040 1.18 itojun * - RFC2461 says we MAY send multicast unsolicited NA 1041 1.18 itojun * (7.2.6 paragraph 4), however, it also says that we 1042 1.18 itojun * SHOULD provide a mechanism to prevent multicast NA storm. 1043 1.18 itojun * we don't have anything like it right now. 1044 1.18 itojun * note that the mechanism need a mutual agreement 1045 1.18 itojun * between proxies, which means that we need to implement 1046 1.18 itojun * a new protocol, or new kludge. 1047 1.18 itojun * - from RFC2461 6.2.4, host MUST NOT send unsolicited NA. 1048 1.18 itojun * we need to check ip6forwarding before sending it. 1049 1.18 itojun * (or should we allow proxy ND configuration only for 1050 1.18 itojun * routers? there's no mention about proxy ND from hosts) 1051 1.18 itojun */ 1052 1.18 itojun #if 0 1053 1.18 itojun /* XXX it does not work */ 1054 1.2 itojun if (rt->rt_flags & RTF_ANNOUNCE) 1055 1.2 itojun nd6_na_output(ifp, 1056 1.18 itojun &SIN6(rt_key(rt))->sin6_addr, 1057 1.18 itojun &SIN6(rt_key(rt))->sin6_addr, 1058 1.18 itojun ip6_forwarding ? ND_NA_FLAG_ROUTER : 0, 1059 1.18 itojun 1, NULL); 1060 1.18 itojun #endif 1061 1.2 itojun /* FALLTHROUGH */ 1062 1.2 itojun case RTM_RESOLVE: 1063 1.2 itojun if (gate->sa_family != AF_LINK || 1064 1.18 itojun gate->sa_len < sizeof(null_sdl)) { 1065 1.2 itojun log(LOG_DEBUG, "nd6_rtrequest: bad gateway value\n"); 1066 1.2 itojun break; 1067 1.2 itojun } 1068 1.2 itojun SDL(gate)->sdl_type = ifp->if_type; 1069 1.2 itojun SDL(gate)->sdl_index = ifp->if_index; 1070 1.2 itojun if (ln != 0) 1071 1.2 itojun break; /* This happens on a route change */ 1072 1.2 itojun /* 1073 1.2 itojun * Case 2: This route may come from cloning, or a manual route 1074 1.2 itojun * add with a LL address. 1075 1.2 itojun */ 1076 1.2 itojun R_Malloc(ln, struct llinfo_nd6 *, sizeof(*ln)); 1077 1.2 itojun rt->rt_llinfo = (caddr_t)ln; 1078 1.2 itojun if (!ln) { 1079 1.2 itojun log(LOG_DEBUG, "nd6_rtrequest: malloc failed\n"); 1080 1.2 itojun break; 1081 1.2 itojun } 1082 1.2 itojun nd6_inuse++; 1083 1.2 itojun nd6_allocated++; 1084 1.2 itojun Bzero(ln, sizeof(*ln)); 1085 1.2 itojun ln->ln_rt = rt; 1086 1.2 itojun /* this is required for "ndp" command. - shin */ 1087 1.2 itojun if (req == RTM_ADD) { 1088 1.2 itojun /* 1089 1.2 itojun * gate should have some valid AF_LINK entry, 1090 1.2 itojun * and ln->ln_expire should have some lifetime 1091 1.2 itojun * which is specified by ndp command. 1092 1.2 itojun */ 1093 1.2 itojun ln->ln_state = ND6_LLINFO_REACHABLE; 1094 1.2 itojun } else { 1095 1.2 itojun /* 1096 1.2 itojun * When req == RTM_RESOLVE, rt is created and 1097 1.2 itojun * initialized in rtrequest(), so rt_expire is 0. 1098 1.2 itojun */ 1099 1.12 itojun ln->ln_state = ND6_LLINFO_NOSTATE; 1100 1.2 itojun ln->ln_expire = time_second; 1101 1.2 itojun } 1102 1.2 itojun rt->rt_flags |= RTF_LLINFO; 1103 1.3 itojun ln->ln_next = llinfo_nd6.ln_next; 1104 1.3 itojun llinfo_nd6.ln_next = ln; 1105 1.3 itojun ln->ln_prev = &llinfo_nd6; 1106 1.3 itojun ln->ln_next->ln_prev = ln; 1107 1.2 itojun 1108 1.2 itojun /* 1109 1.2 itojun * check if rt_key(rt) is one of my address assigned 1110 1.2 itojun * to the interface. 1111 1.2 itojun */ 1112 1.2 itojun ifa = (struct ifaddr *)in6ifa_ifpwithaddr(rt->rt_ifp, 1113 1.2 itojun &SIN6(rt_key(rt))->sin6_addr); 1114 1.2 itojun if (ifa) { 1115 1.2 itojun caddr_t macp = nd6_ifptomac(ifp); 1116 1.2 itojun ln->ln_expire = 0; 1117 1.2 itojun ln->ln_state = ND6_LLINFO_REACHABLE; 1118 1.2 itojun if (macp) { 1119 1.2 itojun Bcopy(macp, LLADDR(SDL(gate)), ifp->if_addrlen); 1120 1.2 itojun SDL(gate)->sdl_alen = ifp->if_addrlen; 1121 1.2 itojun } 1122 1.2 itojun if (nd6_useloopback) { 1123 1.2 itojun rt->rt_ifp = &loif[0]; /*XXX*/ 1124 1.2 itojun /* 1125 1.2 itojun * Make sure rt_ifa be equal to the ifaddr 1126 1.2 itojun * corresponding to the address. 1127 1.2 itojun * We need this because when we refer 1128 1.2 itojun * rt_ifa->ia6_flags in ip6_input, we assume 1129 1.2 itojun * that the rt_ifa points to the address instead 1130 1.2 itojun * of the loopback address. 1131 1.2 itojun */ 1132 1.2 itojun if (ifa != rt->rt_ifa) { 1133 1.14 thorpej IFAFREE(rt->rt_ifa); 1134 1.14 thorpej IFAREF(ifa); 1135 1.2 itojun rt->rt_ifa = ifa; 1136 1.2 itojun } 1137 1.2 itojun } 1138 1.18 itojun } else if (rt->rt_flags & RTF_ANNOUNCE) { 1139 1.18 itojun ln->ln_expire = 0; 1140 1.18 itojun ln->ln_state = ND6_LLINFO_REACHABLE; 1141 1.18 itojun 1142 1.18 itojun /* join solicited node multicast for proxy ND */ 1143 1.18 itojun if (ifp->if_flags & IFF_MULTICAST) { 1144 1.18 itojun struct in6_addr llsol; 1145 1.18 itojun int error; 1146 1.18 itojun 1147 1.18 itojun llsol = SIN6(rt_key(rt))->sin6_addr; 1148 1.18 itojun llsol.s6_addr16[0] = htons(0xff02); 1149 1.18 itojun llsol.s6_addr16[1] = htons(ifp->if_index); 1150 1.18 itojun llsol.s6_addr32[1] = 0; 1151 1.18 itojun llsol.s6_addr32[2] = htonl(1); 1152 1.18 itojun llsol.s6_addr8[12] = 0xff; 1153 1.18 itojun 1154 1.18 itojun (void)in6_addmulti(&llsol, ifp, &error); 1155 1.18 itojun if (error) 1156 1.18 itojun printf( 1157 1.18 itojun "nd6_rtrequest: could not join solicited node multicast (errno=%d)\n", error); 1158 1.18 itojun } 1159 1.2 itojun } 1160 1.2 itojun break; 1161 1.2 itojun 1162 1.2 itojun case RTM_DELETE: 1163 1.2 itojun if (!ln) 1164 1.2 itojun break; 1165 1.18 itojun /* leave from solicited node multicast for proxy ND */ 1166 1.18 itojun if ((rt->rt_flags & RTF_ANNOUNCE) != 0 && 1167 1.18 itojun (ifp->if_flags & IFF_MULTICAST) != 0) { 1168 1.18 itojun struct in6_addr llsol; 1169 1.18 itojun struct in6_multi *in6m; 1170 1.18 itojun 1171 1.18 itojun llsol = SIN6(rt_key(rt))->sin6_addr; 1172 1.18 itojun llsol.s6_addr16[0] = htons(0xff02); 1173 1.18 itojun llsol.s6_addr16[1] = htons(ifp->if_index); 1174 1.18 itojun llsol.s6_addr32[1] = 0; 1175 1.18 itojun llsol.s6_addr32[2] = htonl(1); 1176 1.18 itojun llsol.s6_addr8[12] = 0xff; 1177 1.18 itojun 1178 1.18 itojun IN6_LOOKUP_MULTI(llsol, ifp, in6m); 1179 1.18 itojun if (in6m) 1180 1.18 itojun in6_delmulti(in6m); 1181 1.18 itojun } 1182 1.2 itojun nd6_inuse--; 1183 1.3 itojun ln->ln_next->ln_prev = ln->ln_prev; 1184 1.3 itojun ln->ln_prev->ln_next = ln->ln_next; 1185 1.3 itojun ln->ln_prev = NULL; 1186 1.2 itojun rt->rt_llinfo = 0; 1187 1.2 itojun rt->rt_flags &= ~RTF_LLINFO; 1188 1.2 itojun if (ln->ln_hold) 1189 1.2 itojun m_freem(ln->ln_hold); 1190 1.2 itojun Free((caddr_t)ln); 1191 1.2 itojun } 1192 1.2 itojun } 1193 1.2 itojun 1194 1.2 itojun void 1195 1.2 itojun nd6_p2p_rtrequest(req, rt, sa) 1196 1.2 itojun int req; 1197 1.2 itojun struct rtentry *rt; 1198 1.2 itojun struct sockaddr *sa; /* xxx unused */ 1199 1.2 itojun { 1200 1.2 itojun struct sockaddr *gate = rt->rt_gateway; 1201 1.2 itojun static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1202 1.2 itojun struct ifnet *ifp = rt->rt_ifp; 1203 1.2 itojun struct ifaddr *ifa; 1204 1.2 itojun 1205 1.2 itojun if (rt->rt_flags & RTF_GATEWAY) 1206 1.2 itojun return; 1207 1.2 itojun 1208 1.2 itojun switch (req) { 1209 1.2 itojun case RTM_ADD: 1210 1.2 itojun /* 1211 1.2 itojun * There is no backward compatibility :) 1212 1.2 itojun * 1213 1.2 itojun * if ((rt->rt_flags & RTF_HOST) == 0 && 1214 1.2 itojun * SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff) 1215 1.2 itojun * rt->rt_flags |= RTF_CLONING; 1216 1.2 itojun */ 1217 1.2 itojun if (rt->rt_flags & RTF_CLONING) { 1218 1.2 itojun /* 1219 1.2 itojun * Case 1: This route should come from 1220 1.2 itojun * a route to interface. 1221 1.2 itojun */ 1222 1.2 itojun rt_setgate(rt, rt_key(rt), 1223 1.2 itojun (struct sockaddr *)&null_sdl); 1224 1.2 itojun gate = rt->rt_gateway; 1225 1.2 itojun SDL(gate)->sdl_type = ifp->if_type; 1226 1.2 itojun SDL(gate)->sdl_index = ifp->if_index; 1227 1.2 itojun break; 1228 1.2 itojun } 1229 1.12 itojun /* Announce a new entry if requested. */ 1230 1.2 itojun if (rt->rt_flags & RTF_ANNOUNCE) 1231 1.2 itojun nd6_na_output(ifp, 1232 1.2 itojun &SIN6(rt_key(rt))->sin6_addr, 1233 1.2 itojun &SIN6(rt_key(rt))->sin6_addr, 1234 1.2 itojun ip6_forwarding ? ND_NA_FLAG_ROUTER : 0, 1235 1.18 itojun 1, NULL); 1236 1.2 itojun /* FALLTHROUGH */ 1237 1.2 itojun case RTM_RESOLVE: 1238 1.2 itojun /* 1239 1.2 itojun * check if rt_key(rt) is one of my address assigned 1240 1.2 itojun * to the interface. 1241 1.2 itojun */ 1242 1.2 itojun ifa = (struct ifaddr *)in6ifa_ifpwithaddr(rt->rt_ifp, 1243 1.2 itojun &SIN6(rt_key(rt))->sin6_addr); 1244 1.2 itojun if (ifa) { 1245 1.2 itojun if (nd6_useloopback) { 1246 1.12 itojun rt->rt_ifp = &loif[0]; /*XXX*/ 1247 1.2 itojun } 1248 1.2 itojun } 1249 1.2 itojun break; 1250 1.2 itojun } 1251 1.2 itojun } 1252 1.2 itojun 1253 1.2 itojun int 1254 1.2 itojun nd6_ioctl(cmd, data, ifp) 1255 1.2 itojun u_long cmd; 1256 1.2 itojun caddr_t data; 1257 1.2 itojun struct ifnet *ifp; 1258 1.2 itojun { 1259 1.2 itojun struct in6_drlist *drl = (struct in6_drlist *)data; 1260 1.2 itojun struct in6_prlist *prl = (struct in6_prlist *)data; 1261 1.2 itojun struct in6_ndireq *ndi = (struct in6_ndireq *)data; 1262 1.2 itojun struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1263 1.12 itojun struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1264 1.2 itojun struct nd_defrouter *dr, any; 1265 1.2 itojun struct nd_prefix *pr; 1266 1.2 itojun struct rtentry *rt; 1267 1.2 itojun int i = 0, error = 0; 1268 1.2 itojun int s; 1269 1.2 itojun 1270 1.2 itojun switch (cmd) { 1271 1.2 itojun case SIOCGDRLST_IN6: 1272 1.2 itojun bzero(drl, sizeof(*drl)); 1273 1.5 itojun s = splsoftnet(); 1274 1.12 itojun dr = TAILQ_FIRST(&nd_defrouter); 1275 1.2 itojun while (dr && i < DRLSTSIZ) { 1276 1.2 itojun drl->defrouter[i].rtaddr = dr->rtaddr; 1277 1.2 itojun if (IN6_IS_ADDR_LINKLOCAL(&drl->defrouter[i].rtaddr)) { 1278 1.2 itojun /* XXX: need to this hack for KAME stack */ 1279 1.2 itojun drl->defrouter[i].rtaddr.s6_addr16[1] = 0; 1280 1.2 itojun } 1281 1.2 itojun else 1282 1.2 itojun log(LOG_ERR, 1283 1.2 itojun "default router list contains a " 1284 1.2 itojun "non-linklocal address(%s)\n", 1285 1.2 itojun ip6_sprintf(&drl->defrouter[i].rtaddr)); 1286 1.2 itojun 1287 1.2 itojun drl->defrouter[i].flags = dr->flags; 1288 1.2 itojun drl->defrouter[i].rtlifetime = dr->rtlifetime; 1289 1.2 itojun drl->defrouter[i].expire = dr->expire; 1290 1.2 itojun drl->defrouter[i].if_index = dr->ifp->if_index; 1291 1.2 itojun i++; 1292 1.12 itojun dr = TAILQ_NEXT(dr, dr_entry); 1293 1.2 itojun } 1294 1.2 itojun splx(s); 1295 1.2 itojun break; 1296 1.2 itojun case SIOCGPRLST_IN6: 1297 1.18 itojun /* 1298 1.18 itojun * XXX meaning of fields, especialy "raflags", is very 1299 1.18 itojun * differnet between RA prefix list and RR/static prefix list. 1300 1.18 itojun * how about separating ioctls into two? 1301 1.18 itojun */ 1302 1.2 itojun bzero(prl, sizeof(*prl)); 1303 1.5 itojun s = splsoftnet(); 1304 1.2 itojun pr = nd_prefix.lh_first; 1305 1.2 itojun while (pr && i < PRLSTSIZ) { 1306 1.2 itojun struct nd_pfxrouter *pfr; 1307 1.2 itojun int j; 1308 1.2 itojun 1309 1.2 itojun prl->prefix[i].prefix = pr->ndpr_prefix.sin6_addr; 1310 1.2 itojun prl->prefix[i].raflags = pr->ndpr_raf; 1311 1.2 itojun prl->prefix[i].prefixlen = pr->ndpr_plen; 1312 1.2 itojun prl->prefix[i].vltime = pr->ndpr_vltime; 1313 1.2 itojun prl->prefix[i].pltime = pr->ndpr_pltime; 1314 1.2 itojun prl->prefix[i].if_index = pr->ndpr_ifp->if_index; 1315 1.2 itojun prl->prefix[i].expire = pr->ndpr_expire; 1316 1.2 itojun 1317 1.2 itojun pfr = pr->ndpr_advrtrs.lh_first; 1318 1.2 itojun j = 0; 1319 1.2 itojun while(pfr) { 1320 1.2 itojun if (j < DRLSTSIZ) { 1321 1.2 itojun #define RTRADDR prl->prefix[i].advrtr[j] 1322 1.2 itojun RTRADDR = pfr->router->rtaddr; 1323 1.2 itojun if (IN6_IS_ADDR_LINKLOCAL(&RTRADDR)) { 1324 1.2 itojun /* XXX: hack for KAME */ 1325 1.2 itojun RTRADDR.s6_addr16[1] = 0; 1326 1.2 itojun } 1327 1.2 itojun else 1328 1.2 itojun log(LOG_ERR, 1329 1.2 itojun "a router(%s) advertises " 1330 1.2 itojun "a prefix with " 1331 1.2 itojun "non-link local address\n", 1332 1.2 itojun ip6_sprintf(&RTRADDR)); 1333 1.2 itojun #undef RTRADDR 1334 1.2 itojun } 1335 1.2 itojun j++; 1336 1.2 itojun pfr = pfr->pfr_next; 1337 1.2 itojun } 1338 1.2 itojun prl->prefix[i].advrtrs = j; 1339 1.18 itojun prl->prefix[i].origin = PR_ORIG_RA; 1340 1.2 itojun 1341 1.2 itojun i++; 1342 1.2 itojun pr = pr->ndpr_next; 1343 1.2 itojun } 1344 1.12 itojun { 1345 1.12 itojun struct rr_prefix *rpp; 1346 1.12 itojun 1347 1.12 itojun for (rpp = LIST_FIRST(&rr_prefix); rpp; 1348 1.12 itojun rpp = LIST_NEXT(rpp, rp_entry)) { 1349 1.12 itojun if (i >= PRLSTSIZ) 1350 1.12 itojun break; 1351 1.12 itojun prl->prefix[i].prefix = rpp->rp_prefix.sin6_addr; 1352 1.12 itojun prl->prefix[i].raflags = rpp->rp_raf; 1353 1.12 itojun prl->prefix[i].prefixlen = rpp->rp_plen; 1354 1.12 itojun prl->prefix[i].vltime = rpp->rp_vltime; 1355 1.12 itojun prl->prefix[i].pltime = rpp->rp_pltime; 1356 1.12 itojun prl->prefix[i].if_index = rpp->rp_ifp->if_index; 1357 1.12 itojun prl->prefix[i].expire = rpp->rp_expire; 1358 1.12 itojun prl->prefix[i].advrtrs = 0; 1359 1.18 itojun prl->prefix[i].origin = rpp->rp_origin; 1360 1.12 itojun i++; 1361 1.12 itojun } 1362 1.12 itojun } 1363 1.18 itojun splx(s); 1364 1.12 itojun 1365 1.2 itojun break; 1366 1.2 itojun case SIOCGIFINFO_IN6: 1367 1.2 itojun ndi->ndi = nd_ifinfo[ifp->if_index]; 1368 1.2 itojun break; 1369 1.12 itojun case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1370 1.2 itojun /* flush default router list */ 1371 1.2 itojun /* 1372 1.2 itojun * xxx sumikawa: should not delete route if default 1373 1.2 itojun * route equals to the top of default router list 1374 1.2 itojun */ 1375 1.2 itojun bzero(&any, sizeof(any)); 1376 1.2 itojun defrouter_delreq(&any, 0); 1377 1.12 itojun defrouter_select(); 1378 1.2 itojun /* xxx sumikawa: flush prefix list */ 1379 1.2 itojun break; 1380 1.2 itojun case SIOCSPFXFLUSH_IN6: 1381 1.2 itojun { 1382 1.2 itojun /* flush all the prefix advertised by routers */ 1383 1.2 itojun struct nd_prefix *pr, *next; 1384 1.2 itojun 1385 1.5 itojun s = splsoftnet(); 1386 1.2 itojun for (pr = nd_prefix.lh_first; pr; pr = next) { 1387 1.2 itojun next = pr->ndpr_next; 1388 1.2 itojun if (!IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr)) 1389 1.2 itojun in6_ifdel(pr->ndpr_ifp, &pr->ndpr_addr); 1390 1.2 itojun prelist_remove(pr); 1391 1.2 itojun } 1392 1.2 itojun splx(s); 1393 1.2 itojun break; 1394 1.2 itojun } 1395 1.2 itojun case SIOCSRTRFLUSH_IN6: 1396 1.2 itojun { 1397 1.2 itojun /* flush all the default routers */ 1398 1.2 itojun struct nd_defrouter *dr, *next; 1399 1.2 itojun 1400 1.5 itojun s = splsoftnet(); 1401 1.12 itojun if ((dr = TAILQ_FIRST(&nd_defrouter)) != NULL) { 1402 1.2 itojun /* 1403 1.2 itojun * The first entry of the list may be stored in 1404 1.2 itojun * the routing table, so we'll delete it later. 1405 1.2 itojun */ 1406 1.12 itojun for (dr = TAILQ_NEXT(dr, dr_entry); dr; dr = next) { 1407 1.12 itojun next = TAILQ_NEXT(dr, dr_entry); 1408 1.2 itojun defrtrlist_del(dr); 1409 1.2 itojun } 1410 1.12 itojun defrtrlist_del(TAILQ_FIRST(&nd_defrouter)); 1411 1.2 itojun } 1412 1.2 itojun splx(s); 1413 1.2 itojun break; 1414 1.2 itojun } 1415 1.2 itojun case SIOCGNBRINFO_IN6: 1416 1.2 itojun { 1417 1.12 itojun struct llinfo_nd6 *ln; 1418 1.12 itojun struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 1419 1.12 itojun 1420 1.12 itojun /* 1421 1.12 itojun * XXX: KAME specific hack for scoped addresses 1422 1.12 itojun * XXXX: for other scopes than link-local? 1423 1.12 itojun */ 1424 1.12 itojun if (IN6_IS_ADDR_LINKLOCAL(&nbi->addr) || 1425 1.12 itojun IN6_IS_ADDR_MC_LINKLOCAL(&nbi->addr)) { 1426 1.12 itojun u_int16_t *idp = (u_int16_t *)&nb_addr.s6_addr[2]; 1427 1.12 itojun 1428 1.12 itojun if (*idp == 0) 1429 1.12 itojun *idp = htons(ifp->if_index); 1430 1.12 itojun } 1431 1.2 itojun 1432 1.12 itojun s = splsoftnet(); 1433 1.12 itojun if ((rt = nd6_lookup(&nb_addr, 0, ifp)) == NULL) { 1434 1.12 itojun error = EINVAL; 1435 1.12 itojun splx(s); 1436 1.12 itojun break; 1437 1.12 itojun } 1438 1.12 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1439 1.12 itojun nbi->state = ln->ln_state; 1440 1.12 itojun nbi->asked = ln->ln_asked; 1441 1.12 itojun nbi->isrouter = ln->ln_router; 1442 1.12 itojun nbi->expire = ln->ln_expire; 1443 1.12 itojun splx(s); 1444 1.12 itojun 1445 1.12 itojun break; 1446 1.2 itojun } 1447 1.12 itojun case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1448 1.12 itojun ndif->ifindex = nd6_defifindex; 1449 1.12 itojun break; 1450 1.12 itojun case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1451 1.12 itojun return(nd6_setdefaultiface(ndif->ifindex)); 1452 1.12 itojun break; 1453 1.2 itojun } 1454 1.2 itojun return(error); 1455 1.2 itojun } 1456 1.2 itojun 1457 1.2 itojun /* 1458 1.2 itojun * Create neighbor cache entry and cache link-layer address, 1459 1.2 itojun * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 1460 1.2 itojun */ 1461 1.2 itojun struct rtentry * 1462 1.8 itojun nd6_cache_lladdr(ifp, from, lladdr, lladdrlen, type, code) 1463 1.2 itojun struct ifnet *ifp; 1464 1.2 itojun struct in6_addr *from; 1465 1.2 itojun char *lladdr; 1466 1.2 itojun int lladdrlen; 1467 1.2 itojun int type; /* ICMP6 type */ 1468 1.8 itojun int code; /* type dependent information */ 1469 1.2 itojun { 1470 1.2 itojun struct rtentry *rt = NULL; 1471 1.2 itojun struct llinfo_nd6 *ln = NULL; 1472 1.2 itojun int is_newentry; 1473 1.2 itojun struct sockaddr_dl *sdl = NULL; 1474 1.2 itojun int do_update; 1475 1.2 itojun int olladdr; 1476 1.2 itojun int llchange; 1477 1.2 itojun int newstate = 0; 1478 1.12 itojun long time_second = time.tv_sec; 1479 1.2 itojun 1480 1.2 itojun if (!ifp) 1481 1.2 itojun panic("ifp == NULL in nd6_cache_lladdr"); 1482 1.2 itojun if (!from) 1483 1.2 itojun panic("from == NULL in nd6_cache_lladdr"); 1484 1.2 itojun 1485 1.2 itojun /* nothing must be updated for unspecified address */ 1486 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(from)) 1487 1.2 itojun return NULL; 1488 1.2 itojun 1489 1.2 itojun /* 1490 1.2 itojun * Validation about ifp->if_addrlen and lladdrlen must be done in 1491 1.2 itojun * the caller. 1492 1.2 itojun * 1493 1.2 itojun * XXX If the link does not have link-layer adderss, what should 1494 1.2 itojun * we do? (ifp->if_addrlen == 0) 1495 1.2 itojun * Spec says nothing in sections for RA, RS and NA. There's small 1496 1.2 itojun * description on it in NS section (RFC 2461 7.2.3). 1497 1.2 itojun */ 1498 1.2 itojun 1499 1.2 itojun rt = nd6_lookup(from, 0, ifp); 1500 1.2 itojun if (!rt) { 1501 1.2 itojun #if 0 1502 1.2 itojun /* nothing must be done if there's no lladdr */ 1503 1.2 itojun if (!lladdr || !lladdrlen) 1504 1.2 itojun return NULL; 1505 1.2 itojun #endif 1506 1.2 itojun 1507 1.2 itojun rt = nd6_lookup(from, 1, ifp); 1508 1.2 itojun is_newentry = 1; 1509 1.2 itojun } else 1510 1.2 itojun is_newentry = 0; 1511 1.2 itojun 1512 1.2 itojun if (!rt) 1513 1.2 itojun return NULL; 1514 1.2 itojun if ((rt->rt_flags & (RTF_GATEWAY | RTF_LLINFO)) != RTF_LLINFO) { 1515 1.2 itojun fail: 1516 1.2 itojun nd6_free(rt); 1517 1.2 itojun return NULL; 1518 1.2 itojun } 1519 1.2 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1520 1.2 itojun if (!ln) 1521 1.2 itojun goto fail; 1522 1.2 itojun if (!rt->rt_gateway) 1523 1.2 itojun goto fail; 1524 1.2 itojun if (rt->rt_gateway->sa_family != AF_LINK) 1525 1.2 itojun goto fail; 1526 1.2 itojun sdl = SDL(rt->rt_gateway); 1527 1.2 itojun 1528 1.2 itojun olladdr = (sdl->sdl_alen) ? 1 : 0; 1529 1.2 itojun if (olladdr && lladdr) { 1530 1.2 itojun if (bcmp(lladdr, LLADDR(sdl), ifp->if_addrlen)) 1531 1.2 itojun llchange = 1; 1532 1.2 itojun else 1533 1.2 itojun llchange = 0; 1534 1.2 itojun } else 1535 1.2 itojun llchange = 0; 1536 1.2 itojun 1537 1.2 itojun /* 1538 1.2 itojun * newentry olladdr lladdr llchange (*=record) 1539 1.2 itojun * 0 n n -- (1) 1540 1.2 itojun * 0 y n -- (2) 1541 1.2 itojun * 0 n y -- (3) * STALE 1542 1.2 itojun * 0 y y n (4) * 1543 1.2 itojun * 0 y y y (5) * STALE 1544 1.2 itojun * 1 -- n -- (6) NOSTATE(= PASSIVE) 1545 1.2 itojun * 1 -- y -- (7) * STALE 1546 1.2 itojun */ 1547 1.2 itojun 1548 1.2 itojun if (lladdr) { /*(3-5) and (7)*/ 1549 1.2 itojun /* 1550 1.2 itojun * Record source link-layer address 1551 1.2 itojun * XXX is it dependent to ifp->if_type? 1552 1.2 itojun */ 1553 1.2 itojun sdl->sdl_alen = ifp->if_addrlen; 1554 1.2 itojun bcopy(lladdr, LLADDR(sdl), ifp->if_addrlen); 1555 1.2 itojun } 1556 1.2 itojun 1557 1.2 itojun if (!is_newentry) { 1558 1.2 itojun if ((!olladdr && lladdr) /*(3)*/ 1559 1.2 itojun || (olladdr && lladdr && llchange)) { /*(5)*/ 1560 1.2 itojun do_update = 1; 1561 1.2 itojun newstate = ND6_LLINFO_STALE; 1562 1.2 itojun } else /*(1-2,4)*/ 1563 1.2 itojun do_update = 0; 1564 1.2 itojun } else { 1565 1.2 itojun do_update = 1; 1566 1.2 itojun if (!lladdr) /*(6)*/ 1567 1.2 itojun newstate = ND6_LLINFO_NOSTATE; 1568 1.2 itojun else /*(7)*/ 1569 1.2 itojun newstate = ND6_LLINFO_STALE; 1570 1.2 itojun } 1571 1.2 itojun 1572 1.2 itojun if (do_update) { 1573 1.2 itojun /* 1574 1.2 itojun * Update the state of the neighbor cache. 1575 1.2 itojun */ 1576 1.2 itojun ln->ln_state = newstate; 1577 1.2 itojun 1578 1.2 itojun if (ln->ln_state == ND6_LLINFO_STALE) { 1579 1.2 itojun rt->rt_flags &= ~RTF_REJECT; 1580 1.2 itojun if (ln->ln_hold) { 1581 1.12 itojun #ifdef OLDIP6OUTPUT 1582 1.2 itojun (*ifp->if_output)(ifp, ln->ln_hold, 1583 1.2 itojun rt_key(rt), rt); 1584 1.12 itojun #else 1585 1.12 itojun nd6_output(ifp, ln->ln_hold, 1586 1.12 itojun (struct sockaddr_in6 *)rt_key(rt), 1587 1.12 itojun rt); 1588 1.12 itojun #endif 1589 1.2 itojun ln->ln_hold = 0; 1590 1.2 itojun } 1591 1.2 itojun } else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) { 1592 1.2 itojun /* probe right away */ 1593 1.2 itojun ln->ln_expire = time_second; 1594 1.2 itojun } 1595 1.2 itojun } 1596 1.2 itojun 1597 1.2 itojun /* 1598 1.2 itojun * ICMP6 type dependent behavior. 1599 1.2 itojun * 1600 1.2 itojun * NS: clear IsRouter if new entry 1601 1.2 itojun * RS: clear IsRouter 1602 1.2 itojun * RA: set IsRouter if there's lladdr 1603 1.2 itojun * redir: clear IsRouter if new entry 1604 1.2 itojun * 1605 1.2 itojun * RA case, (1): 1606 1.2 itojun * The spec says that we must set IsRouter in the following cases: 1607 1.2 itojun * - If lladdr exist, set IsRouter. This means (1-5). 1608 1.2 itojun * - If it is old entry (!newentry), set IsRouter. This means (7). 1609 1.2 itojun * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 1610 1.2 itojun * A quetion arises for (1) case. (1) case has no lladdr in the 1611 1.2 itojun * neighbor cache, this is similar to (6). 1612 1.2 itojun * This case is rare but we figured that we MUST NOT set IsRouter. 1613 1.2 itojun * 1614 1.2 itojun * newentry olladdr lladdr llchange NS RS RA redir 1615 1.8 itojun * D R 1616 1.8 itojun * 0 n n -- (1) c ? s 1617 1.8 itojun * 0 y n -- (2) c s s 1618 1.8 itojun * 0 n y -- (3) c s s 1619 1.8 itojun * 0 y y n (4) c s s 1620 1.8 itojun * 0 y y y (5) c s s 1621 1.8 itojun * 1 -- n -- (6) c c c s 1622 1.8 itojun * 1 -- y -- (7) c c s c s 1623 1.2 itojun * 1624 1.2 itojun * (c=clear s=set) 1625 1.2 itojun */ 1626 1.2 itojun switch (type & 0xff) { 1627 1.2 itojun case ND_NEIGHBOR_SOLICIT: 1628 1.2 itojun /* 1629 1.2 itojun * New entry must have is_router flag cleared. 1630 1.2 itojun */ 1631 1.2 itojun if (is_newentry) /*(6-7)*/ 1632 1.8 itojun ln->ln_router = 0; 1633 1.8 itojun break; 1634 1.8 itojun case ND_REDIRECT: 1635 1.8 itojun /* 1636 1.8 itojun * If the icmp is a redirect to a better router, always set the 1637 1.8 itojun * is_router flag. Otherwise, if the entry is newly created, 1638 1.8 itojun * clear the flag. [RFC 2461, sec 8.3] 1639 1.8 itojun * 1640 1.8 itojun */ 1641 1.8 itojun if (code == ND_REDIRECT_ROUTER) 1642 1.8 itojun ln->ln_router = 1; 1643 1.8 itojun else if (is_newentry) /*(6-7)*/ 1644 1.2 itojun ln->ln_router = 0; 1645 1.2 itojun break; 1646 1.2 itojun case ND_ROUTER_SOLICIT: 1647 1.2 itojun /* 1648 1.2 itojun * is_router flag must always be cleared. 1649 1.2 itojun */ 1650 1.2 itojun ln->ln_router = 0; 1651 1.2 itojun break; 1652 1.2 itojun case ND_ROUTER_ADVERT: 1653 1.2 itojun /* 1654 1.2 itojun * Mark an entry with lladdr as a router. 1655 1.2 itojun */ 1656 1.2 itojun if ((!is_newentry && (olladdr || lladdr)) /*(2-5)*/ 1657 1.2 itojun || (is_newentry && lladdr)) { /*(7)*/ 1658 1.2 itojun ln->ln_router = 1; 1659 1.2 itojun } 1660 1.2 itojun break; 1661 1.2 itojun } 1662 1.2 itojun 1663 1.2 itojun return rt; 1664 1.2 itojun } 1665 1.2 itojun 1666 1.2 itojun static void 1667 1.2 itojun nd6_slowtimo(ignored_arg) 1668 1.2 itojun void *ignored_arg; 1669 1.2 itojun { 1670 1.5 itojun int s = splsoftnet(); 1671 1.2 itojun register int i; 1672 1.2 itojun register struct nd_ifinfo *nd6if; 1673 1.2 itojun 1674 1.2 itojun timeout(nd6_slowtimo, (caddr_t)0, ND6_SLOWTIMER_INTERVAL * hz); 1675 1.2 itojun for (i = 1; i < if_index + 1; i++) { 1676 1.2 itojun nd6if = &nd_ifinfo[i]; 1677 1.2 itojun if (nd6if->basereachable && /* already initialized */ 1678 1.2 itojun (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 1679 1.2 itojun /* 1680 1.2 itojun * Since reachable time rarely changes by router 1681 1.2 itojun * advertisements, we SHOULD insure that a new random 1682 1.2 itojun * value gets recomputed at least once every few hours. 1683 1.2 itojun * (RFC 2461, 6.3.4) 1684 1.2 itojun */ 1685 1.2 itojun nd6if->recalctm = nd6_recalc_reachtm_interval; 1686 1.2 itojun nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 1687 1.2 itojun } 1688 1.2 itojun } 1689 1.2 itojun splx(s); 1690 1.2 itojun } 1691 1.2 itojun 1692 1.2 itojun #define senderr(e) { error = (e); goto bad;} 1693 1.2 itojun int 1694 1.2 itojun nd6_output(ifp, m0, dst, rt0) 1695 1.2 itojun register struct ifnet *ifp; 1696 1.2 itojun struct mbuf *m0; 1697 1.2 itojun struct sockaddr_in6 *dst; 1698 1.2 itojun struct rtentry *rt0; 1699 1.2 itojun { 1700 1.2 itojun register struct mbuf *m = m0; 1701 1.2 itojun register struct rtentry *rt = rt0; 1702 1.2 itojun struct llinfo_nd6 *ln = NULL; 1703 1.2 itojun int error = 0; 1704 1.12 itojun long time_second = time.tv_sec; 1705 1.2 itojun 1706 1.2 itojun if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr)) 1707 1.2 itojun goto sendpkt; 1708 1.2 itojun 1709 1.2 itojun /* 1710 1.2 itojun * XXX: we currently do not make neighbor cache on any interface 1711 1.9 is * other than ARCnet, Ethernet and FDDI. 1712 1.2 itojun */ 1713 1.10 itojun switch (ifp->if_type) { 1714 1.10 itojun case IFT_ARCNET: 1715 1.10 itojun case IFT_ETHER: 1716 1.10 itojun case IFT_FDDI: 1717 1.10 itojun break; 1718 1.10 itojun default: 1719 1.2 itojun goto sendpkt; 1720 1.10 itojun } 1721 1.2 itojun 1722 1.2 itojun /* 1723 1.2 itojun * next hop determination. This routine is derived from ether_outpout. 1724 1.2 itojun */ 1725 1.2 itojun if (rt) { 1726 1.2 itojun if ((rt->rt_flags & RTF_UP) == 0) { 1727 1.2 itojun if ((rt0 = rt = rtalloc1((struct sockaddr *)dst, 1)) != 1728 1.12 itojun NULL) 1729 1.12 itojun { 1730 1.2 itojun rt->rt_refcnt--; 1731 1.2 itojun if (rt->rt_ifp != ifp) 1732 1.2 itojun return nd6_output(ifp, m0, dst, rt); /* XXX: loop care? */ 1733 1.2 itojun } else 1734 1.2 itojun senderr(EHOSTUNREACH); 1735 1.2 itojun } 1736 1.2 itojun if (rt->rt_flags & RTF_GATEWAY) { 1737 1.2 itojun if (rt->rt_gwroute == 0) 1738 1.2 itojun goto lookup; 1739 1.2 itojun if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 1740 1.2 itojun rtfree(rt); rt = rt0; 1741 1.2 itojun lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 1742 1.2 itojun if ((rt = rt->rt_gwroute) == 0) 1743 1.2 itojun senderr(EHOSTUNREACH); 1744 1.2 itojun } 1745 1.2 itojun } 1746 1.2 itojun if (rt->rt_flags & RTF_REJECT) 1747 1.2 itojun senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 1748 1.2 itojun } 1749 1.2 itojun 1750 1.2 itojun /* 1751 1.2 itojun * Address resolution or Neighbor Unreachability Detection 1752 1.2 itojun * for the next hop. 1753 1.2 itojun * At this point, the destination of the packet must be a unicast 1754 1.2 itojun * or an anycast address(i.e. not a multicast). 1755 1.2 itojun */ 1756 1.2 itojun 1757 1.2 itojun /* Look up the neighbor cache for the nexthop */ 1758 1.2 itojun if (rt && (rt->rt_flags & RTF_LLINFO) != 0) 1759 1.2 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1760 1.2 itojun else { 1761 1.2 itojun if ((rt = nd6_lookup(&dst->sin6_addr, 1, ifp)) != NULL) 1762 1.2 itojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1763 1.2 itojun } 1764 1.2 itojun if (!ln || !rt) { 1765 1.2 itojun log(LOG_DEBUG, "nd6_output: can't allocate llinfo for %s " 1766 1.2 itojun "(ln=%p, rt=%p)\n", 1767 1.2 itojun ip6_sprintf(&dst->sin6_addr), ln, rt); 1768 1.2 itojun senderr(EIO); /* XXX: good error? */ 1769 1.2 itojun } 1770 1.2 itojun 1771 1.2 itojun 1772 1.2 itojun /* 1773 1.2 itojun * The first time we send a packet to a neighbor whose entry is 1774 1.2 itojun * STALE, we have to change the state to DELAY and a sets a timer to 1775 1.2 itojun * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 1776 1.2 itojun * neighbor unreachability detection on expiration. 1777 1.2 itojun * (RFC 2461 7.3.3) 1778 1.2 itojun */ 1779 1.2 itojun if (ln->ln_state == ND6_LLINFO_STALE) { 1780 1.2 itojun ln->ln_asked = 0; 1781 1.2 itojun ln->ln_state = ND6_LLINFO_DELAY; 1782 1.2 itojun ln->ln_expire = time_second + nd6_delay; 1783 1.2 itojun } 1784 1.2 itojun 1785 1.2 itojun /* 1786 1.2 itojun * If the neighbor cache entry has a state other than INCOMPLETE 1787 1.2 itojun * (i.e. its link-layer address is already reloved), just 1788 1.2 itojun * send the packet. 1789 1.2 itojun */ 1790 1.2 itojun if (ln->ln_state > ND6_LLINFO_INCOMPLETE) 1791 1.2 itojun goto sendpkt; 1792 1.2 itojun 1793 1.2 itojun /* 1794 1.2 itojun * There is a neighbor cache entry, but no ethernet address 1795 1.2 itojun * response yet. Replace the held mbuf (if any) with this 1796 1.2 itojun * latest one. 1797 1.2 itojun * 1798 1.2 itojun * XXX Does the code conform to rate-limiting rule? 1799 1.2 itojun * (RFC 2461 7.2.2) 1800 1.2 itojun */ 1801 1.2 itojun if (ln->ln_state == ND6_LLINFO_WAITDELETE || 1802 1.2 itojun ln->ln_state == ND6_LLINFO_NOSTATE) 1803 1.2 itojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 1804 1.2 itojun if (ln->ln_hold) 1805 1.2 itojun m_freem(ln->ln_hold); 1806 1.2 itojun ln->ln_hold = m; 1807 1.2 itojun if (ln->ln_expire) { 1808 1.2 itojun rt->rt_flags &= ~RTF_REJECT; 1809 1.2 itojun if (ln->ln_asked < nd6_mmaxtries && 1810 1.2 itojun ln->ln_expire < time_second) { 1811 1.2 itojun ln->ln_asked++; 1812 1.2 itojun ln->ln_expire = time_second + 1813 1.2 itojun nd_ifinfo[ifp->if_index].retrans / 1000; 1814 1.2 itojun nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0); 1815 1.2 itojun } 1816 1.2 itojun } 1817 1.2 itojun return(0); 1818 1.2 itojun 1819 1.2 itojun sendpkt: 1820 1.2 itojun return((*ifp->if_output)(ifp, m, (struct sockaddr *)dst, rt)); 1821 1.2 itojun 1822 1.2 itojun bad: 1823 1.2 itojun if (m) 1824 1.2 itojun m_freem(m); 1825 1.2 itojun return (error); 1826 1.2 itojun } 1827 1.2 itojun #undef senderr 1828 1.2 itojun 1829 1.2 itojun int 1830 1.2 itojun nd6_storelladdr(ifp, rt, m, dst, desten) 1831 1.2 itojun struct ifnet *ifp; 1832 1.2 itojun struct rtentry *rt; 1833 1.2 itojun struct mbuf *m; 1834 1.2 itojun struct sockaddr *dst; 1835 1.2 itojun u_char *desten; 1836 1.2 itojun { 1837 1.2 itojun struct sockaddr_dl *sdl; 1838 1.2 itojun 1839 1.2 itojun if (m->m_flags & M_MCAST) { 1840 1.2 itojun switch (ifp->if_type) { 1841 1.2 itojun case IFT_ETHER: 1842 1.2 itojun case IFT_FDDI: 1843 1.2 itojun ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr, 1844 1.2 itojun desten); 1845 1.9 is return(1); 1846 1.9 is break; 1847 1.9 is case IFT_ARCNET: 1848 1.9 is *desten = 0; 1849 1.2 itojun return(1); 1850 1.2 itojun default: 1851 1.2 itojun return(0); 1852 1.2 itojun } 1853 1.2 itojun } 1854 1.2 itojun 1855 1.2 itojun if (rt == NULL || 1856 1.2 itojun rt->rt_gateway->sa_family != AF_LINK) { 1857 1.2 itojun printf("nd6_storelladdr: something odd happens\n"); 1858 1.2 itojun return(0); 1859 1.2 itojun } 1860 1.2 itojun sdl = SDL(rt->rt_gateway); 1861 1.2 itojun if (sdl->sdl_alen != 0) 1862 1.2 itojun bcopy(LLADDR(sdl), desten, sdl->sdl_alen); 1863 1.2 itojun 1864 1.2 itojun return(1); 1865 1.2 itojun } 1866
Indexes created Sat Sep 20 22:09:52 GMT 2025