1*da592434Sitojun /* $OpenBSD: nd6.c,v 1.59 2002/10/09 20:25:32 itojun Exp $ */ 2d8a7e3a7Sitojun /* $KAME: nd6.c,v 1.280 2002/06/08 19:52:07 itojun Exp $ */ 3287546eaSitojun 4287546eaSitojun /* 5287546eaSitojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6287546eaSitojun * All rights reserved. 7287546eaSitojun * 8287546eaSitojun * Redistribution and use in source and binary forms, with or without 9287546eaSitojun * modification, are permitted provided that the following conditions 10287546eaSitojun * are met: 11287546eaSitojun * 1. Redistributions of source code must retain the above copyright 12287546eaSitojun * notice, this list of conditions and the following disclaimer. 13287546eaSitojun * 2. Redistributions in binary form must reproduce the above copyright 14287546eaSitojun * notice, this list of conditions and the following disclaimer in the 15287546eaSitojun * documentation and/or other materials provided with the distribution. 16287546eaSitojun * 3. Neither the name of the project nor the names of its contributors 17287546eaSitojun * may be used to endorse or promote products derived from this software 18287546eaSitojun * without specific prior written permission. 19287546eaSitojun * 20287546eaSitojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21287546eaSitojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22287546eaSitojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23287546eaSitojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24287546eaSitojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25287546eaSitojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26287546eaSitojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27287546eaSitojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28287546eaSitojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29287546eaSitojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30287546eaSitojun * SUCH DAMAGE. 31287546eaSitojun */ 32287546eaSitojun 33287546eaSitojun #include <sys/param.h> 34287546eaSitojun #include <sys/systm.h> 35b3c1e4c1Sitojun #include <sys/timeout.h> 36287546eaSitojun #include <sys/malloc.h> 37287546eaSitojun #include <sys/mbuf.h> 38287546eaSitojun #include <sys/socket.h> 39287546eaSitojun #include <sys/sockio.h> 40287546eaSitojun #include <sys/time.h> 41287546eaSitojun #include <sys/kernel.h> 42f4f4d166Sitojun #include <sys/protosw.h> 43287546eaSitojun #include <sys/errno.h> 44287546eaSitojun #include <sys/ioctl.h> 45287546eaSitojun #include <sys/syslog.h> 46287546eaSitojun #include <sys/queue.h> 473c4c637fSangelos #include <dev/rndvar.h> 48287546eaSitojun 49287546eaSitojun #include <net/if.h> 50287546eaSitojun #include <net/if_dl.h> 51287546eaSitojun #include <net/if_types.h> 52d6b9e9b9Sitojun #include <net/if_fddi.h> 53287546eaSitojun #include <net/route.h> 54287546eaSitojun 55287546eaSitojun #include <netinet/in.h> 56287546eaSitojun #include <netinet/if_ether.h> 57cb39d30aSangelos #include <netinet/ip_ipsp.h> 5858aa7d74Sangelos 59287546eaSitojun #include <netinet6/in6_var.h> 60fa86ee14Sitojun #include <netinet/ip6.h> 61287546eaSitojun #include <netinet6/ip6_var.h> 62287546eaSitojun #include <netinet6/nd6.h> 63fa86ee14Sitojun #include <netinet/icmp6.h> 64287546eaSitojun 65287546eaSitojun #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */ 66287546eaSitojun #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */ 67287546eaSitojun 68287546eaSitojun #define SIN6(s) ((struct sockaddr_in6 *)s) 69287546eaSitojun #define SDL(s) ((struct sockaddr_dl *)s) 70287546eaSitojun 71287546eaSitojun /* timer values */ 72287546eaSitojun int nd6_prune = 1; /* walk list every 1 seconds */ 73287546eaSitojun int nd6_delay = 5; /* delay first probe time 5 second */ 74287546eaSitojun int nd6_umaxtries = 3; /* maximum unicast query */ 75287546eaSitojun int nd6_mmaxtries = 3; /* maximum multicast query */ 76287546eaSitojun int nd6_useloopback = 1; /* use loopback interface for local traffic */ 77be4e9e12Sitojun int nd6_gctimer = (60 * 60 * 24); /* 1 day: garbage collection timer */ 78287546eaSitojun 79287546eaSitojun /* preventing too many loops in ND option parsing */ 80287546eaSitojun int nd6_maxndopt = 10; /* max # of ND options allowed */ 81287546eaSitojun 82f6e55599Sitojun int nd6_maxnudhint = 0; /* max # of subsequent upper layer hints */ 83f6e55599Sitojun 84b79da24aSitojun #ifdef ND6_DEBUG 85b79da24aSitojun int nd6_debug = 1; 86b79da24aSitojun #else 87b79da24aSitojun int nd6_debug = 0; 88b79da24aSitojun #endif 89b79da24aSitojun 90287546eaSitojun /* for debugging? */ 91287546eaSitojun static int nd6_inuse, nd6_allocated; 92287546eaSitojun 93287546eaSitojun struct llinfo_nd6 llinfo_nd6 = {&llinfo_nd6, &llinfo_nd6}; 94f4f4d166Sitojun struct nd_drhead nd_defrouter; 95287546eaSitojun struct nd_prhead nd_prefix = { 0 }; 96287546eaSitojun 97287546eaSitojun int nd6_recalc_reachtm_interval = ND6_RECALC_REACHTM_INTERVAL; 98287546eaSitojun static struct sockaddr_in6 all1_sa; 99287546eaSitojun 1001b5f410aSitojun static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *); 101c4071fd1Smillert static void nd6_slowtimo(void *); 102d8a7e3a7Sitojun static struct llinfo_nd6 *nd6_free(struct rtentry *, int); 103287546eaSitojun 104b3c1e4c1Sitojun struct timeout nd6_slowtimo_ch; 105b3c1e4c1Sitojun struct timeout nd6_timer_ch; 106b3c1e4c1Sitojun extern struct timeout in6_tmpaddrtimer_ch; 107b3c1e4c1Sitojun 108d8a7e3a7Sitojun static int fill_drlist(void *, size_t *, size_t); 109d8a7e3a7Sitojun static int fill_prlist(void *, size_t *, size_t); 110d8a7e3a7Sitojun 111287546eaSitojun void 112287546eaSitojun nd6_init() 113287546eaSitojun { 114287546eaSitojun static int nd6_init_done = 0; 115287546eaSitojun int i; 116287546eaSitojun 117287546eaSitojun if (nd6_init_done) { 118287546eaSitojun log(LOG_NOTICE, "nd6_init called more than once(ignored)\n"); 119287546eaSitojun return; 120287546eaSitojun } 121287546eaSitojun 122287546eaSitojun all1_sa.sin6_family = AF_INET6; 123287546eaSitojun all1_sa.sin6_len = sizeof(struct sockaddr_in6); 124287546eaSitojun for (i = 0; i < sizeof(all1_sa.sin6_addr); i++) 125287546eaSitojun all1_sa.sin6_addr.s6_addr[i] = 0xff; 126287546eaSitojun 127f4f4d166Sitojun /* initialization of the default router list */ 128f4f4d166Sitojun TAILQ_INIT(&nd_defrouter); 129f4f4d166Sitojun 130287546eaSitojun nd6_init_done = 1; 131287546eaSitojun 132287546eaSitojun /* start timer */ 133b3c1e4c1Sitojun timeout_set(&nd6_slowtimo_ch, nd6_slowtimo, NULL); 134b3c1e4c1Sitojun timeout_add(&nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz); 135287546eaSitojun } 136287546eaSitojun 137d6b9e9b9Sitojun struct nd_ifinfo * 138287546eaSitojun nd6_ifattach(ifp) 139287546eaSitojun struct ifnet *ifp; 140287546eaSitojun { 141d6b9e9b9Sitojun struct nd_ifinfo *nd; 142287546eaSitojun 143d6b9e9b9Sitojun nd = (struct nd_ifinfo *)malloc(sizeof(*nd), M_IP6NDP, M_WAITOK); 144d6b9e9b9Sitojun bzero(nd, sizeof(*nd)); 145287546eaSitojun 146d6b9e9b9Sitojun nd->initialized = 1; 147287546eaSitojun 148d6b9e9b9Sitojun nd->chlim = IPV6_DEFHLIM; 149d6b9e9b9Sitojun nd->basereachable = REACHABLE_TIME; 150d6b9e9b9Sitojun nd->reachable = ND_COMPUTE_RTIME(nd->basereachable); 151d6b9e9b9Sitojun nd->retrans = RETRANS_TIMER; 152d8a7e3a7Sitojun /* 153d8a7e3a7Sitojun * Note that the default value of ip6_accept_rtadv is 0, which means 154d8a7e3a7Sitojun * we won't accept RAs by default even if we set ND6_IFF_ACCEPT_RTADV 155d8a7e3a7Sitojun * here. 156d8a7e3a7Sitojun */ 157d8a7e3a7Sitojun nd->flags = (ND6_IFF_PERFORMNUD | ND6_IFF_ACCEPT_RTADV); 1581b5f410aSitojun 1591b5f410aSitojun /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */ 1601b5f410aSitojun nd6_setmtu0(ifp, nd); 161d6b9e9b9Sitojun 162d6b9e9b9Sitojun return nd; 163287546eaSitojun } 164287546eaSitojun 165d6b9e9b9Sitojun void 166d6b9e9b9Sitojun nd6_ifdetach(nd) 167d6b9e9b9Sitojun struct nd_ifinfo *nd; 168d6b9e9b9Sitojun { 169d374aaacSitojun 170d6b9e9b9Sitojun free(nd, M_IP6NDP); 171287546eaSitojun } 172287546eaSitojun 173287546eaSitojun void 1741b5f410aSitojun nd6_setmtu(ifp) 1751b5f410aSitojun struct ifnet *ifp; 1761b5f410aSitojun { 1771b5f410aSitojun nd6_setmtu0(ifp, ND_IFINFO(ifp)); 1781b5f410aSitojun } 1791b5f410aSitojun 1801b5f410aSitojun void 1811b5f410aSitojun nd6_setmtu0(ifp, ndi) 182287546eaSitojun struct ifnet *ifp; 183d6b9e9b9Sitojun struct nd_ifinfo *ndi; 184287546eaSitojun { 1851b5f410aSitojun u_int32_t omaxmtu; 1861b5f410aSitojun 1871b5f410aSitojun omaxmtu = ndi->maxmtu; 188287546eaSitojun 189287546eaSitojun switch (ifp->if_type) { 1908ae3362bSitojun case IFT_ARCNET: 1918ae3362bSitojun ndi->maxmtu = MIN(60480, ifp->if_mtu); /* RFC2497 */ 192287546eaSitojun break; 193d6b9e9b9Sitojun case IFT_FDDI: 194d6b9e9b9Sitojun ndi->maxmtu = MIN(FDDIMTU, ifp->if_mtu); 195d6b9e9b9Sitojun break; 196287546eaSitojun default: 197287546eaSitojun ndi->maxmtu = ifp->if_mtu; 198287546eaSitojun break; 199287546eaSitojun } 200287546eaSitojun 2011b5f410aSitojun /* 2021b5f410aSitojun * Decreasing the interface MTU under IPV6 minimum MTU may cause 2031b5f410aSitojun * undesirable situation. We thus notify the operator of the change 2041b5f410aSitojun * explicitly. The check for omaxmtu is necessary to restrict the 2051b5f410aSitojun * log to the case of changing the MTU, not initializing it. 2061b5f410aSitojun */ 2071b5f410aSitojun if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) { 2081b5f410aSitojun log(LOG_NOTICE, "nd6_setmtu0: " 2091b5f410aSitojun "new link MTU on %s (%lu) is too small for IPv6\n", 2101b5f410aSitojun ifp->if_xname, (unsigned long)ndi->maxmtu); 211287546eaSitojun } 212d6b9e9b9Sitojun 213d6b9e9b9Sitojun if (ndi->maxmtu > in6_maxmtu) 214d6b9e9b9Sitojun in6_setmaxmtu(); /* check all interfaces just in case */ 215287546eaSitojun } 216287546eaSitojun 217287546eaSitojun void 218287546eaSitojun nd6_option_init(opt, icmp6len, ndopts) 219287546eaSitojun void *opt; 220287546eaSitojun int icmp6len; 221287546eaSitojun union nd_opts *ndopts; 222287546eaSitojun { 223d6b9e9b9Sitojun 224287546eaSitojun bzero(ndopts, sizeof(*ndopts)); 225287546eaSitojun ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 226287546eaSitojun ndopts->nd_opts_last 227287546eaSitojun = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 228287546eaSitojun 229287546eaSitojun if (icmp6len == 0) { 230287546eaSitojun ndopts->nd_opts_done = 1; 231287546eaSitojun ndopts->nd_opts_search = NULL; 232287546eaSitojun } 233287546eaSitojun } 234287546eaSitojun 235287546eaSitojun /* 236287546eaSitojun * Take one ND option. 237287546eaSitojun */ 238287546eaSitojun struct nd_opt_hdr * 239287546eaSitojun nd6_option(ndopts) 240287546eaSitojun union nd_opts *ndopts; 241287546eaSitojun { 242287546eaSitojun struct nd_opt_hdr *nd_opt; 243287546eaSitojun int olen; 244287546eaSitojun 245287546eaSitojun if (!ndopts) 246287546eaSitojun panic("ndopts == NULL in nd6_option\n"); 247287546eaSitojun if (!ndopts->nd_opts_last) 248287546eaSitojun panic("uninitialized ndopts in nd6_option\n"); 249287546eaSitojun if (!ndopts->nd_opts_search) 250287546eaSitojun return NULL; 251287546eaSitojun if (ndopts->nd_opts_done) 252287546eaSitojun return NULL; 253287546eaSitojun 254287546eaSitojun nd_opt = ndopts->nd_opts_search; 255287546eaSitojun 25615bd77d2Sitojun /* make sure nd_opt_len is inside the buffer */ 25715bd77d2Sitojun if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) { 25815bd77d2Sitojun bzero(ndopts, sizeof(*ndopts)); 25915bd77d2Sitojun return NULL; 26015bd77d2Sitojun } 26115bd77d2Sitojun 262287546eaSitojun olen = nd_opt->nd_opt_len << 3; 263287546eaSitojun if (olen == 0) { 264287546eaSitojun /* 265287546eaSitojun * Message validation requires that all included 266287546eaSitojun * options have a length that is greater than zero. 267287546eaSitojun */ 268287546eaSitojun bzero(ndopts, sizeof(*ndopts)); 269287546eaSitojun return NULL; 270287546eaSitojun } 271287546eaSitojun 272287546eaSitojun ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 27315bd77d2Sitojun if (ndopts->nd_opts_search > ndopts->nd_opts_last) { 27415bd77d2Sitojun /* option overruns the end of buffer, invalid */ 27515bd77d2Sitojun bzero(ndopts, sizeof(*ndopts)); 27615bd77d2Sitojun return NULL; 27715bd77d2Sitojun } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) { 27815bd77d2Sitojun /* reached the end of options chain */ 279287546eaSitojun ndopts->nd_opts_done = 1; 280287546eaSitojun ndopts->nd_opts_search = NULL; 281287546eaSitojun } 282287546eaSitojun return nd_opt; 283287546eaSitojun } 284287546eaSitojun 285287546eaSitojun /* 286287546eaSitojun * Parse multiple ND options. 287287546eaSitojun * This function is much easier to use, for ND routines that do not need 288287546eaSitojun * multiple options of the same type. 289287546eaSitojun */ 290287546eaSitojun int 291287546eaSitojun nd6_options(ndopts) 292287546eaSitojun union nd_opts *ndopts; 293287546eaSitojun { 294287546eaSitojun struct nd_opt_hdr *nd_opt; 295287546eaSitojun int i = 0; 296287546eaSitojun 297287546eaSitojun if (!ndopts) 298287546eaSitojun panic("ndopts == NULL in nd6_options\n"); 299287546eaSitojun if (!ndopts->nd_opts_last) 300287546eaSitojun panic("uninitialized ndopts in nd6_options\n"); 301287546eaSitojun if (!ndopts->nd_opts_search) 302287546eaSitojun return 0; 303287546eaSitojun 304287546eaSitojun while (1) { 305287546eaSitojun nd_opt = nd6_option(ndopts); 306287546eaSitojun if (!nd_opt && !ndopts->nd_opts_last) { 307287546eaSitojun /* 308287546eaSitojun * Message validation requires that all included 309287546eaSitojun * options have a length that is greater than zero. 310287546eaSitojun */ 311b79da24aSitojun icmp6stat.icp6s_nd_badopt++; 312287546eaSitojun bzero(ndopts, sizeof(*ndopts)); 313287546eaSitojun return -1; 314287546eaSitojun } 315287546eaSitojun 316287546eaSitojun if (!nd_opt) 317287546eaSitojun goto skip1; 318287546eaSitojun 319287546eaSitojun switch (nd_opt->nd_opt_type) { 320287546eaSitojun case ND_OPT_SOURCE_LINKADDR: 321287546eaSitojun case ND_OPT_TARGET_LINKADDR: 322287546eaSitojun case ND_OPT_MTU: 323287546eaSitojun case ND_OPT_REDIRECTED_HEADER: 324287546eaSitojun if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 32515bd77d2Sitojun nd6log((LOG_INFO, 32615bd77d2Sitojun "duplicated ND6 option found (type=%d)\n", 32715bd77d2Sitojun nd_opt->nd_opt_type)); 328287546eaSitojun /* XXX bark? */ 329287546eaSitojun } else { 330287546eaSitojun ndopts->nd_opt_array[nd_opt->nd_opt_type] 331287546eaSitojun = nd_opt; 332287546eaSitojun } 333287546eaSitojun break; 334287546eaSitojun case ND_OPT_PREFIX_INFORMATION: 335287546eaSitojun if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 336287546eaSitojun ndopts->nd_opt_array[nd_opt->nd_opt_type] 337287546eaSitojun = nd_opt; 338287546eaSitojun } 339287546eaSitojun ndopts->nd_opts_pi_end = 340287546eaSitojun (struct nd_opt_prefix_info *)nd_opt; 341287546eaSitojun break; 342287546eaSitojun default: 343287546eaSitojun /* 344287546eaSitojun * Unknown options must be silently ignored, 345e4d25771Stodd * to accommodate future extension to the protocol. 346287546eaSitojun */ 347b79da24aSitojun nd6log((LOG_DEBUG, 348287546eaSitojun "nd6_options: unsupported option %d - " 349b79da24aSitojun "option ignored\n", nd_opt->nd_opt_type)); 350287546eaSitojun } 351287546eaSitojun 352287546eaSitojun skip1: 353287546eaSitojun i++; 354287546eaSitojun if (i > nd6_maxndopt) { 355287546eaSitojun icmp6stat.icp6s_nd_toomanyopt++; 356b79da24aSitojun nd6log((LOG_INFO, "too many loop in nd opt\n")); 357287546eaSitojun break; 358287546eaSitojun } 359287546eaSitojun 360287546eaSitojun if (ndopts->nd_opts_done) 361287546eaSitojun break; 362287546eaSitojun } 363287546eaSitojun 364287546eaSitojun return 0; 365287546eaSitojun } 366287546eaSitojun 367287546eaSitojun /* 368287546eaSitojun * ND6 timer routine to expire default route list and prefix list 369287546eaSitojun */ 370287546eaSitojun void 371287546eaSitojun nd6_timer(ignored_arg) 372287546eaSitojun void *ignored_arg; 373287546eaSitojun { 374287546eaSitojun int s; 375b3c1e4c1Sitojun struct llinfo_nd6 *ln; 376b3c1e4c1Sitojun struct nd_defrouter *dr; 377b3c1e4c1Sitojun struct nd_prefix *pr; 378287546eaSitojun long time_second = time.tv_sec; 379d8a7e3a7Sitojun struct ifnet *ifp; 380d8a7e3a7Sitojun struct in6_ifaddr *ia6, *nia6; 381d8a7e3a7Sitojun struct in6_addrlifetime *lt6; 382287546eaSitojun 3836e92dee6Sitojun s = splsoftnet(); 384b3c1e4c1Sitojun timeout_set(&nd6_timer_ch, nd6_timer, NULL); 385b3c1e4c1Sitojun timeout_add(&nd6_timer_ch, nd6_prune * hz); 386287546eaSitojun 387287546eaSitojun ln = llinfo_nd6.ln_next; 388287546eaSitojun while (ln && ln != &llinfo_nd6) { 389287546eaSitojun struct rtentry *rt; 390287546eaSitojun struct sockaddr_in6 *dst; 391287546eaSitojun struct llinfo_nd6 *next = ln->ln_next; 392d374aaacSitojun /* XXX: used for the DELAY case only: */ 393d374aaacSitojun struct nd_ifinfo *ndi = NULL; 394287546eaSitojun 395287546eaSitojun if ((rt = ln->ln_rt) == NULL) { 396287546eaSitojun ln = next; 397287546eaSitojun continue; 398287546eaSitojun } 399287546eaSitojun if ((ifp = rt->rt_ifp) == NULL) { 400287546eaSitojun ln = next; 401287546eaSitojun continue; 402287546eaSitojun } 403d6b9e9b9Sitojun ndi = ND_IFINFO(ifp); 404287546eaSitojun dst = (struct sockaddr_in6 *)rt_key(rt); 405287546eaSitojun 406287546eaSitojun if (ln->ln_expire > time_second) { 407287546eaSitojun ln = next; 408287546eaSitojun continue; 409287546eaSitojun } 410287546eaSitojun 411287546eaSitojun /* sanity check */ 412287546eaSitojun if (!rt) 413287546eaSitojun panic("rt=0 in nd6_timer(ln=%p)\n", ln); 414d374aaacSitojun if (rt->rt_llinfo && (struct llinfo_nd6 *)rt->rt_llinfo != ln) 415d374aaacSitojun panic("rt_llinfo(%p) is not equal to ln(%p)\n", 416d374aaacSitojun rt->rt_llinfo, ln); 417287546eaSitojun if (!dst) 418287546eaSitojun panic("dst=0 in nd6_timer(ln=%p)\n", ln); 419287546eaSitojun 420287546eaSitojun switch (ln->ln_state) { 421287546eaSitojun case ND6_LLINFO_INCOMPLETE: 422287546eaSitojun if (ln->ln_asked < nd6_mmaxtries) { 423287546eaSitojun ln->ln_asked++; 424287546eaSitojun ln->ln_expire = time_second + 425d6b9e9b9Sitojun ND6_RETRANS_SEC(ND_IFINFO(ifp)->retrans); 426287546eaSitojun nd6_ns_output(ifp, NULL, &dst->sin6_addr, 427287546eaSitojun ln, 0); 428287546eaSitojun } else { 429287546eaSitojun struct mbuf *m = ln->ln_hold; 430287546eaSitojun if (m) { 431287546eaSitojun /* 432d8a7e3a7Sitojun * Fake rcvif to make the ICMP error 433d8a7e3a7Sitojun * more helpful in diagnosing for the 434d8a7e3a7Sitojun * receiver. 435287546eaSitojun * XXX: should we consider 436287546eaSitojun * older rcvif? 437287546eaSitojun */ 438287546eaSitojun m->m_pkthdr.rcvif = rt->rt_ifp; 439d8a7e3a7Sitojun 440287546eaSitojun icmp6_error(m, ICMP6_DST_UNREACH, 441287546eaSitojun ICMP6_DST_UNREACH_ADDR, 0); 442287546eaSitojun ln->ln_hold = NULL; 443287546eaSitojun } 444d8a7e3a7Sitojun next = nd6_free(rt, 0); 445287546eaSitojun } 446287546eaSitojun break; 447287546eaSitojun case ND6_LLINFO_REACHABLE: 448be4e9e12Sitojun if (ln->ln_expire) { 449287546eaSitojun ln->ln_state = ND6_LLINFO_STALE; 450be4e9e12Sitojun ln->ln_expire = time_second + nd6_gctimer; 451be4e9e12Sitojun } 452287546eaSitojun break; 453be4e9e12Sitojun 454be4e9e12Sitojun case ND6_LLINFO_STALE: 455be4e9e12Sitojun /* Garbage Collection(RFC 2461 5.3) */ 456be4e9e12Sitojun if (ln->ln_expire) 457d8a7e3a7Sitojun next = nd6_free(rt, 1); 458be4e9e12Sitojun break; 459be4e9e12Sitojun 460287546eaSitojun case ND6_LLINFO_DELAY: 461d374aaacSitojun if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) { 462d374aaacSitojun /* We need NUD */ 463287546eaSitojun ln->ln_asked = 1; 464287546eaSitojun ln->ln_state = ND6_LLINFO_PROBE; 465287546eaSitojun ln->ln_expire = time_second + 46676843262Sitojun ND6_RETRANS_SEC(ndi->retrans); 467d374aaacSitojun nd6_ns_output(ifp, &dst->sin6_addr, 468d8a7e3a7Sitojun &dst->sin6_addr, ln, 0); 469be4e9e12Sitojun } else { 470d374aaacSitojun ln->ln_state = ND6_LLINFO_STALE; /* XXX */ 471be4e9e12Sitojun ln->ln_expire = time_second + nd6_gctimer; 472be4e9e12Sitojun } 473287546eaSitojun break; 474287546eaSitojun case ND6_LLINFO_PROBE: 475287546eaSitojun if (ln->ln_asked < nd6_umaxtries) { 476287546eaSitojun ln->ln_asked++; 477287546eaSitojun ln->ln_expire = time_second + 478d6b9e9b9Sitojun ND6_RETRANS_SEC(ND_IFINFO(ifp)->retrans); 479287546eaSitojun nd6_ns_output(ifp, &dst->sin6_addr, 480287546eaSitojun &dst->sin6_addr, ln, 0); 481d8a7e3a7Sitojun } else { 482d8a7e3a7Sitojun next = nd6_free(rt, 0); 483d8a7e3a7Sitojun } 484287546eaSitojun break; 485287546eaSitojun } 486287546eaSitojun ln = next; 487287546eaSitojun } 488287546eaSitojun 4890a2c5741Sitojun /* expire default router list */ 490f4f4d166Sitojun dr = TAILQ_FIRST(&nd_defrouter); 491287546eaSitojun while (dr) { 492287546eaSitojun if (dr->expire && dr->expire < time_second) { 493287546eaSitojun struct nd_defrouter *t; 494f4f4d166Sitojun t = TAILQ_NEXT(dr, dr_entry); 495287546eaSitojun defrtrlist_del(dr); 496287546eaSitojun dr = t; 497d8a7e3a7Sitojun } else { 498f4f4d166Sitojun dr = TAILQ_NEXT(dr, dr_entry); 499287546eaSitojun } 500287546eaSitojun } 501287546eaSitojun 502287546eaSitojun /* 503d8a7e3a7Sitojun * expire interface addresses. 504d8a7e3a7Sitojun * in the past the loop was inside prefix expiry processing. 505d8a7e3a7Sitojun * However, from a stricter speci-confrmance standpoint, we should 506d8a7e3a7Sitojun * rather separate address lifetimes and prefix lifetimes. 507d8a7e3a7Sitojun */ 508d8a7e3a7Sitojun for (ia6 = in6_ifaddr; ia6; ia6 = nia6) { 509d8a7e3a7Sitojun nia6 = ia6->ia_next; 510d8a7e3a7Sitojun /* check address lifetime */ 511d8a7e3a7Sitojun lt6 = &ia6->ia6_lifetime; 512d8a7e3a7Sitojun if (IFA6_IS_INVALID(ia6)) { 513d8a7e3a7Sitojun in6_purgeaddr(&ia6->ia_ifa); 514d8a7e3a7Sitojun } 5157d37e67aSitojun if (IFA6_IS_DEPRECATED(ia6)) { 516d8a7e3a7Sitojun ia6->ia6_flags |= IN6_IFF_DEPRECATED; 517d8a7e3a7Sitojun } else { 518d8a7e3a7Sitojun /* 519d8a7e3a7Sitojun * A new RA might have made a deprecated address 520d8a7e3a7Sitojun * preferred. 521d8a7e3a7Sitojun */ 522d8a7e3a7Sitojun ia6->ia6_flags &= ~IN6_IFF_DEPRECATED; 523d8a7e3a7Sitojun } 524d8a7e3a7Sitojun } 525d8a7e3a7Sitojun 526d8a7e3a7Sitojun /* expire prefix list */ 527d8a7e3a7Sitojun pr = nd_prefix.lh_first; 528d8a7e3a7Sitojun while (pr) { 529d8a7e3a7Sitojun /* 530287546eaSitojun * check prefix lifetime. 531287546eaSitojun * since pltime is just for autoconf, pltime processing for 532287546eaSitojun * prefix is not necessary. 533287546eaSitojun */ 534d8a7e3a7Sitojun if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME && 535d8a7e3a7Sitojun time_second - pr->ndpr_lastupdate > pr->ndpr_vltime) { 536287546eaSitojun struct nd_prefix *t; 537287546eaSitojun t = pr->ndpr_next; 538287546eaSitojun 539287546eaSitojun /* 540287546eaSitojun * address expiration and prefix expiration are 541d8a7e3a7Sitojun * separate. NEVER perform in6_purgeaddr here. 542287546eaSitojun */ 543287546eaSitojun 544287546eaSitojun prelist_remove(pr); 545287546eaSitojun pr = t; 546287546eaSitojun } else 547287546eaSitojun pr = pr->ndpr_next; 548287546eaSitojun } 549287546eaSitojun splx(s); 550287546eaSitojun } 551287546eaSitojun 55222770369Sitojun /* 55322770369Sitojun * Nuke neighbor cache/prefix/default router management table, right before 55422770369Sitojun * ifp goes away. 55522770369Sitojun */ 55622770369Sitojun void 55722770369Sitojun nd6_purge(ifp) 55822770369Sitojun struct ifnet *ifp; 55922770369Sitojun { 56022770369Sitojun struct llinfo_nd6 *ln, *nln; 561d8a7e3a7Sitojun struct nd_defrouter *dr, *ndr; 56222770369Sitojun struct nd_prefix *pr, *npr; 56322770369Sitojun 56422770369Sitojun /* 565d8a7e3a7Sitojun * Nuke default router list entries toward ifp. 566d8a7e3a7Sitojun * We defer removal of default router list entries that is installed 567d8a7e3a7Sitojun * in the routing table, in order to keep additional side effects as 568d8a7e3a7Sitojun * small as possible. 56922770369Sitojun */ 570d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = ndr) { 571f4f4d166Sitojun ndr = TAILQ_NEXT(dr, dr_entry); 572d8a7e3a7Sitojun if (dr->installed) 573d8a7e3a7Sitojun continue; 574d8a7e3a7Sitojun 57522770369Sitojun if (dr->ifp == ifp) 57622770369Sitojun defrtrlist_del(dr); 57722770369Sitojun } 578d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = ndr) { 579d8a7e3a7Sitojun ndr = TAILQ_NEXT(dr, dr_entry); 580d8a7e3a7Sitojun if (!dr->installed) 581d8a7e3a7Sitojun continue; 582d8a7e3a7Sitojun 58322770369Sitojun if (dr->ifp == ifp) 58422770369Sitojun defrtrlist_del(dr); 58522770369Sitojun } 58622770369Sitojun 58722770369Sitojun /* Nuke prefix list entries toward ifp */ 58822770369Sitojun for (pr = nd_prefix.lh_first; pr; pr = npr) { 58922770369Sitojun npr = pr->ndpr_next; 59022770369Sitojun if (pr->ndpr_ifp == ifp) { 591d8a7e3a7Sitojun /* 592d8a7e3a7Sitojun * Previously, pr->ndpr_addr is removed as well, 593d8a7e3a7Sitojun * but I strongly believe we don't have to do it. 594d8a7e3a7Sitojun * nd6_purge() is only called from in6_ifdetach(), 595d8a7e3a7Sitojun * which removes all the associated interface addresses 596d8a7e3a7Sitojun * by itself. 597d8a7e3a7Sitojun * (jinmei@kame.net 20010129) 598d8a7e3a7Sitojun */ 59922770369Sitojun prelist_remove(pr); 60022770369Sitojun } 60122770369Sitojun } 60222770369Sitojun 603f4f4d166Sitojun /* cancel default outgoing interface setting */ 604f4f4d166Sitojun if (nd6_defifindex == ifp->if_index) 605f4f4d166Sitojun nd6_setdefaultiface(0); 606f4f4d166Sitojun 607e6e438a4Sitojun if (!ip6_forwarding && ip6_accept_rtadv) { /* XXX: too restrictive? */ 60822770369Sitojun /* refresh default router list */ 609f4f4d166Sitojun defrouter_select(); 610e6e438a4Sitojun } 61122770369Sitojun 61222770369Sitojun /* 61322770369Sitojun * Nuke neighbor cache entries for the ifp. 61422770369Sitojun * Note that rt->rt_ifp may not be the same as ifp, 61522770369Sitojun * due to KAME goto ours hack. See RTM_RESOLVE case in 61622770369Sitojun * nd6_rtrequest(), and ip6_input(). 61722770369Sitojun */ 61822770369Sitojun ln = llinfo_nd6.ln_next; 61922770369Sitojun while (ln && ln != &llinfo_nd6) { 62022770369Sitojun struct rtentry *rt; 62122770369Sitojun struct sockaddr_dl *sdl; 62222770369Sitojun 62322770369Sitojun nln = ln->ln_next; 62422770369Sitojun rt = ln->ln_rt; 62522770369Sitojun if (rt && rt->rt_gateway && 62622770369Sitojun rt->rt_gateway->sa_family == AF_LINK) { 62722770369Sitojun sdl = (struct sockaddr_dl *)rt->rt_gateway; 62822770369Sitojun if (sdl->sdl_index == ifp->if_index) 629d8a7e3a7Sitojun nln = nd6_free(rt, 0); 63022770369Sitojun } 63122770369Sitojun ln = nln; 63222770369Sitojun } 63322770369Sitojun } 63422770369Sitojun 635287546eaSitojun struct rtentry * 636287546eaSitojun nd6_lookup(addr6, create, ifp) 637287546eaSitojun struct in6_addr *addr6; 638287546eaSitojun int create; 639287546eaSitojun struct ifnet *ifp; 640287546eaSitojun { 641287546eaSitojun struct rtentry *rt; 642287546eaSitojun struct sockaddr_in6 sin6; 643287546eaSitojun 644287546eaSitojun bzero(&sin6, sizeof(sin6)); 645287546eaSitojun sin6.sin6_len = sizeof(struct sockaddr_in6); 646287546eaSitojun sin6.sin6_family = AF_INET6; 647287546eaSitojun sin6.sin6_addr = *addr6; 648d8a7e3a7Sitojun 64958aa7d74Sangelos rt = rtalloc1((struct sockaddr *)&sin6, create); 650287546eaSitojun if (rt && (rt->rt_flags & RTF_LLINFO) == 0) { 651287546eaSitojun /* 652287546eaSitojun * This is the case for the default route. 653287546eaSitojun * If we want to create a neighbor cache for the address, we 654287546eaSitojun * should free the route for the destination and allocate an 655287546eaSitojun * interface route. 656287546eaSitojun */ 657287546eaSitojun if (create) { 658287546eaSitojun RTFREE(rt); 659287546eaSitojun rt = 0; 660287546eaSitojun } 661287546eaSitojun } 662287546eaSitojun if (!rt) { 663287546eaSitojun if (create && ifp) { 664d374aaacSitojun int e; 665d374aaacSitojun 666287546eaSitojun /* 667287546eaSitojun * If no route is available and create is set, 668287546eaSitojun * we allocate a host route for the destination 669287546eaSitojun * and treat it like an interface route. 670287546eaSitojun * This hack is necessary for a neighbor which can't 671287546eaSitojun * be covered by our own prefix. 672287546eaSitojun */ 673287546eaSitojun struct ifaddr *ifa = 674287546eaSitojun ifaof_ifpforaddr((struct sockaddr *)&sin6, ifp); 675287546eaSitojun if (ifa == NULL) 676287546eaSitojun return (NULL); 677287546eaSitojun 678287546eaSitojun /* 679287546eaSitojun * Create a new route. RTF_LLINFO is necessary 680287546eaSitojun * to create a Neighbor Cache entry for the 681287546eaSitojun * destination in nd6_rtrequest which will be 68234deef1eSitojun * called in rtrequest via ifa->ifa_rtrequest. 683287546eaSitojun */ 684d374aaacSitojun if ((e = rtrequest(RTM_ADD, (struct sockaddr *)&sin6, 685d8a7e3a7Sitojun ifa->ifa_addr, (struct sockaddr *)&all1_sa, 686d8a7e3a7Sitojun (ifa->ifa_flags | RTF_HOST | RTF_LLINFO) & 687d8a7e3a7Sitojun ~RTF_CLONING, &rt)) != 0) { 688d8a7e3a7Sitojun #if 0 689287546eaSitojun log(LOG_ERR, 690287546eaSitojun "nd6_lookup: failed to add route for a " 691d374aaacSitojun "neighbor(%s), errno=%d\n", 692d374aaacSitojun ip6_sprintf(addr6), e); 693d8a7e3a7Sitojun #endif 694d8a7e3a7Sitojun return (NULL); 695d8a7e3a7Sitojun } 696287546eaSitojun if (rt == NULL) 697287546eaSitojun return (NULL); 698287546eaSitojun if (rt->rt_llinfo) { 699287546eaSitojun struct llinfo_nd6 *ln = 700287546eaSitojun (struct llinfo_nd6 *)rt->rt_llinfo; 701287546eaSitojun ln->ln_state = ND6_LLINFO_NOSTATE; 702287546eaSitojun } 703f6e55599Sitojun } else 704287546eaSitojun return (NULL); 705287546eaSitojun } 706287546eaSitojun rt->rt_refcnt--; 707287546eaSitojun /* 708287546eaSitojun * Validation for the entry. 709d8a7e3a7Sitojun * Note that the check for rt_llinfo is necessary because a cloned 710d8a7e3a7Sitojun * route from a parent route that has the L flag (e.g. the default 711d8a7e3a7Sitojun * route to a p2p interface) may have the flag, too, while the 712d8a7e3a7Sitojun * destination is not actually a neighbor. 713287546eaSitojun * XXX: we can't use rt->rt_ifp to check for the interface, since 714287546eaSitojun * it might be the loopback interface if the entry is for our 715287546eaSitojun * own address on a non-loopback interface. Instead, we should 716d8a7e3a7Sitojun * use rt->rt_ifa->ifa_ifp, which would specify the REAL 717d8a7e3a7Sitojun * interface. 718287546eaSitojun */ 719287546eaSitojun if ((rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 || 720d8a7e3a7Sitojun rt->rt_gateway->sa_family != AF_LINK || rt->rt_llinfo == NULL || 721287546eaSitojun (ifp && rt->rt_ifa->ifa_ifp != ifp)) { 722287546eaSitojun if (create) { 723*da592434Sitojun nd6log((LOG_DEBUG, 724d8a7e3a7Sitojun "nd6_lookup: failed to lookup %s (if = %s)\n", 725*da592434Sitojun ip6_sprintf(addr6), 726*da592434Sitojun ifp ? ifp->if_xname : "unspec")); 727287546eaSitojun } 728d8a7e3a7Sitojun return (NULL); 729287546eaSitojun } 730287546eaSitojun return (rt); 731287546eaSitojun } 732287546eaSitojun 733287546eaSitojun /* 734287546eaSitojun * Detect if a given IPv6 address identifies a neighbor on a given link. 735287546eaSitojun * XXX: should take care of the destination of a p2p link? 736287546eaSitojun */ 737287546eaSitojun int 738287546eaSitojun nd6_is_addr_neighbor(addr, ifp) 739cfb6b8dfSitojun struct sockaddr_in6 *addr; 740287546eaSitojun struct ifnet *ifp; 741287546eaSitojun { 742d8a7e3a7Sitojun struct nd_prefix *pr; 743d8a7e3a7Sitojun struct rtentry *rt; 744287546eaSitojun 745cfb6b8dfSitojun /* 746cfb6b8dfSitojun * A link-local address is always a neighbor. 747cfb6b8dfSitojun * XXX: we should use the sin6_scope_id field rather than the embedded 748cfb6b8dfSitojun * interface index. 749d8a7e3a7Sitojun * XXX: a link does not necessarily specify a single interface. 750cfb6b8dfSitojun */ 751cfb6b8dfSitojun if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr) && 752cfb6b8dfSitojun ntohs(*(u_int16_t *)&addr->sin6_addr.s6_addr[2]) == ifp->if_index) 753287546eaSitojun return (1); 754287546eaSitojun 755287546eaSitojun /* 756d8a7e3a7Sitojun * If the address matches one of our on-link prefixes, it should be a 757d8a7e3a7Sitojun * neighbor. 758287546eaSitojun */ 759d8a7e3a7Sitojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) { 760d8a7e3a7Sitojun if (pr->ndpr_ifp != ifp) 761d8a7e3a7Sitojun continue; 762287546eaSitojun 763d8a7e3a7Sitojun if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) 764d8a7e3a7Sitojun continue; 765d8a7e3a7Sitojun 766d8a7e3a7Sitojun if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 767d8a7e3a7Sitojun &addr->sin6_addr, &pr->ndpr_mask)) 768d8a7e3a7Sitojun return (1); 769287546eaSitojun } 770d8a7e3a7Sitojun 771d8a7e3a7Sitojun /* 772d8a7e3a7Sitojun * If the default router list is empty, all addresses are regarded 773d8a7e3a7Sitojun * as on-link, and thus, as a neighbor. 774d8a7e3a7Sitojun * XXX: we restrict the condition to hosts, because routers usually do 775d8a7e3a7Sitojun * not have the "default router list". 776d8a7e3a7Sitojun */ 777d8a7e3a7Sitojun if (!ip6_forwarding && TAILQ_FIRST(&nd_defrouter) == NULL && 778d8a7e3a7Sitojun nd6_defifindex == ifp->if_index) { 779287546eaSitojun return (1); 780287546eaSitojun } 781287546eaSitojun 782287546eaSitojun /* 783287546eaSitojun * Even if the address matches none of our addresses, it might be 784287546eaSitojun * in the neighbor cache. 785287546eaSitojun */ 786d8a7e3a7Sitojun if ((rt = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) 787287546eaSitojun return (1); 788287546eaSitojun 789287546eaSitojun return (0); 790287546eaSitojun } 791287546eaSitojun 792287546eaSitojun /* 793287546eaSitojun * Free an nd6 llinfo entry. 794d8a7e3a7Sitojun * Since the function would cause significant changes in the kernel, DO NOT 795d8a7e3a7Sitojun * make it global, unless you have a strong reason for the change, and are sure 796d8a7e3a7Sitojun * that the change is safe. 797287546eaSitojun */ 798d8a7e3a7Sitojun static struct llinfo_nd6 * 799d8a7e3a7Sitojun nd6_free(rt, gc) 800287546eaSitojun struct rtentry *rt; 801d8a7e3a7Sitojun int gc; 802287546eaSitojun { 80329760ae1Sitojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo, *next; 804f4f4d166Sitojun struct in6_addr in6 = ((struct sockaddr_in6 *)rt_key(rt))->sin6_addr; 805287546eaSitojun struct nd_defrouter *dr; 806287546eaSitojun 807287546eaSitojun /* 808d8a7e3a7Sitojun * we used to have pfctlinput(PRC_HOSTDEAD) here. 809d8a7e3a7Sitojun * even though it is not harmful, it was not really necessary. 810287546eaSitojun */ 811f4f4d166Sitojun 812f4f4d166Sitojun if (!ip6_forwarding && ip6_accept_rtadv) { /* XXX: too restrictive? */ 813f4f4d166Sitojun int s; 8146e92dee6Sitojun s = splsoftnet(); 815f4f4d166Sitojun dr = defrouter_lookup(&((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 816f4f4d166Sitojun rt->rt_ifp); 817d8a7e3a7Sitojun 818d8a7e3a7Sitojun if (dr != NULL && dr->expire && 819d8a7e3a7Sitojun ln->ln_state == ND6_LLINFO_STALE && gc) { 820d8a7e3a7Sitojun /* 821d8a7e3a7Sitojun * If the reason for the deletion is just garbage 822d8a7e3a7Sitojun * collection, and the neighbor is an active default 823d8a7e3a7Sitojun * router, do not delete it. Instead, reset the GC 824d8a7e3a7Sitojun * timer using the router's lifetime. 825d8a7e3a7Sitojun * Simply deleting the entry would affect default 826d8a7e3a7Sitojun * router selection, which is not necessarily a good 827d8a7e3a7Sitojun * thing, especially when we're using router preference 828d8a7e3a7Sitojun * values. 829d8a7e3a7Sitojun * XXX: the check for ln_state would be redundant, 830d8a7e3a7Sitojun * but we intentionally keep it just in case. 831d8a7e3a7Sitojun */ 832d8a7e3a7Sitojun ln->ln_expire = dr->expire; 833d8a7e3a7Sitojun splx(s); 834d8a7e3a7Sitojun return (ln->ln_next); 835d8a7e3a7Sitojun } 836d8a7e3a7Sitojun 837f4f4d166Sitojun if (ln->ln_router || dr) { 838f4f4d166Sitojun /* 839f4f4d166Sitojun * rt6_flush must be called whether or not the neighbor 840f4f4d166Sitojun * is in the Default Router List. 841f4f4d166Sitojun * See a corresponding comment in nd6_na_input(). 842f4f4d166Sitojun */ 843f4f4d166Sitojun rt6_flush(&in6, rt->rt_ifp); 844f4f4d166Sitojun } 845f4f4d166Sitojun 846f4f4d166Sitojun if (dr) { 847f4f4d166Sitojun /* 848f4f4d166Sitojun * Unreachablity of a router might affect the default 849f4f4d166Sitojun * router selection and on-link detection of advertised 850f4f4d166Sitojun * prefixes. 851f4f4d166Sitojun */ 852f4f4d166Sitojun 853f4f4d166Sitojun /* 854f4f4d166Sitojun * Temporarily fake the state to choose a new default 855f4f4d166Sitojun * router and to perform on-link determination of 85634deef1eSitojun * prefixes correctly. 857f4f4d166Sitojun * Below the state will be set correctly, 858f4f4d166Sitojun * or the entry itself will be deleted. 859f4f4d166Sitojun */ 860f4f4d166Sitojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 861f4f4d166Sitojun 862f4f4d166Sitojun /* 863d8a7e3a7Sitojun * Since defrouter_select() does not affect the 864d8a7e3a7Sitojun * on-link determination and MIP6 needs the check 865d8a7e3a7Sitojun * before the default router selection, we perform 866d8a7e3a7Sitojun * the check now. 867f4f4d166Sitojun */ 868f4f4d166Sitojun pfxlist_onlink_check(); 869d8a7e3a7Sitojun 870d8a7e3a7Sitojun /* 871d8a7e3a7Sitojun * refresh default router list 872d8a7e3a7Sitojun */ 873d8a7e3a7Sitojun defrouter_select(); 874287546eaSitojun } 875287546eaSitojun splx(s); 876287546eaSitojun } 877287546eaSitojun 87829760ae1Sitojun /* 87929760ae1Sitojun * Before deleting the entry, remember the next entry as the 88029760ae1Sitojun * return value. We need this because pfxlist_onlink_check() above 88129760ae1Sitojun * might have freed other entries (particularly the old next entry) as 88229760ae1Sitojun * a side effect (XXX). 88329760ae1Sitojun */ 88429760ae1Sitojun next = ln->ln_next; 88529760ae1Sitojun 88629760ae1Sitojun /* 88729760ae1Sitojun * Detach the route from the routing tree and the list of neighbor 88829760ae1Sitojun * caches, and disable the route entry not to be used in already 88929760ae1Sitojun * cached routes. 89029760ae1Sitojun */ 891f4f4d166Sitojun rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0, 892f4f4d166Sitojun rt_mask(rt), 0, (struct rtentry **)0); 89329760ae1Sitojun 8940a2c5741Sitojun return (next); 895287546eaSitojun } 896287546eaSitojun 897287546eaSitojun /* 898287546eaSitojun * Upper-layer reachability hint for Neighbor Unreachability Detection. 899287546eaSitojun * 900287546eaSitojun * XXX cost-effective metods? 901287546eaSitojun */ 902287546eaSitojun void 903f6e55599Sitojun nd6_nud_hint(rt, dst6, force) 904287546eaSitojun struct rtentry *rt; 905287546eaSitojun struct in6_addr *dst6; 906f6e55599Sitojun int force; 907287546eaSitojun { 908287546eaSitojun struct llinfo_nd6 *ln; 909287546eaSitojun long time_second = time.tv_sec; 910287546eaSitojun 911287546eaSitojun /* 912287546eaSitojun * If the caller specified "rt", use that. Otherwise, resolve the 913287546eaSitojun * routing table by supplied "dst6". 914287546eaSitojun */ 915287546eaSitojun if (!rt) { 916287546eaSitojun if (!dst6) 917287546eaSitojun return; 918287546eaSitojun if (!(rt = nd6_lookup(dst6, 0, NULL))) 919287546eaSitojun return; 920287546eaSitojun } 921287546eaSitojun 922f6e55599Sitojun if ((rt->rt_flags & RTF_GATEWAY) != 0 || 923f6e55599Sitojun (rt->rt_flags & RTF_LLINFO) == 0 || 924f6e55599Sitojun !rt->rt_llinfo || !rt->rt_gateway || 925f6e55599Sitojun rt->rt_gateway->sa_family != AF_LINK) { 926287546eaSitojun /* This is not a host route. */ 927287546eaSitojun return; 928287546eaSitojun } 929287546eaSitojun 930287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 931804d8827Sitojun if (ln->ln_state < ND6_LLINFO_REACHABLE) 932287546eaSitojun return; 933287546eaSitojun 934f6e55599Sitojun /* 935f6e55599Sitojun * if we get upper-layer reachability confirmation many times, 936f6e55599Sitojun * it is possible we have false information. 937f6e55599Sitojun */ 938f6e55599Sitojun if (!force) { 939f6e55599Sitojun ln->ln_byhint++; 940f6e55599Sitojun if (ln->ln_byhint > nd6_maxnudhint) 941f6e55599Sitojun return; 942f6e55599Sitojun } 943f6e55599Sitojun 944287546eaSitojun ln->ln_state = ND6_LLINFO_REACHABLE; 945287546eaSitojun if (ln->ln_expire) 946d6b9e9b9Sitojun ln->ln_expire = time_second + ND_IFINFO(rt->rt_ifp)->reachable; 947287546eaSitojun } 948287546eaSitojun 949287546eaSitojun void 950afed035cSitojun nd6_rtrequest(req, rt, info) 951287546eaSitojun int req; 952287546eaSitojun struct rtentry *rt; 953afed035cSitojun struct rt_addrinfo *info; /* xxx unused */ 954287546eaSitojun { 955287546eaSitojun struct sockaddr *gate = rt->rt_gateway; 956287546eaSitojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo; 957287546eaSitojun static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 958287546eaSitojun struct ifnet *ifp = rt->rt_ifp; 959287546eaSitojun struct ifaddr *ifa; 960287546eaSitojun long time_second = time.tv_sec; 961d8a7e3a7Sitojun int mine = 0; 962287546eaSitojun 963d8a7e3a7Sitojun if ((rt->rt_flags & RTF_GATEWAY) != 0) 964287546eaSitojun return; 965287546eaSitojun 966d8a7e3a7Sitojun if (nd6_need_cache(ifp) == 0 && (rt->rt_flags & RTF_HOST) == 0) { 967d8a7e3a7Sitojun /* 968d8a7e3a7Sitojun * This is probably an interface direct route for a link 969d8a7e3a7Sitojun * which does not need neighbor caches (e.g. fe80::%lo0/64). 970d8a7e3a7Sitojun * We do not need special treatment below for such a route. 971d8a7e3a7Sitojun * Moreover, the RTF_LLINFO flag which would be set below 972d8a7e3a7Sitojun * would annoy the ndp(8) command. 973d8a7e3a7Sitojun */ 974d8a7e3a7Sitojun return; 975d8a7e3a7Sitojun } 976d8a7e3a7Sitojun 977d8a7e3a7Sitojun if (req == RTM_RESOLVE && 978d8a7e3a7Sitojun (nd6_need_cache(ifp) == 0 || /* stf case */ 979d8a7e3a7Sitojun !nd6_is_addr_neighbor((struct sockaddr_in6 *)rt_key(rt), ifp))) { 980d8a7e3a7Sitojun /* 981d8a7e3a7Sitojun * FreeBSD and BSD/OS often make a cloned host route based 982d8a7e3a7Sitojun * on a less-specific route (e.g. the default route). 983d8a7e3a7Sitojun * If the less specific route does not have a "gateway" 984d8a7e3a7Sitojun * (this is the case when the route just goes to a p2p or an 985d8a7e3a7Sitojun * stf interface), we'll mistakenly make a neighbor cache for 986d8a7e3a7Sitojun * the host route, and will see strange neighbor solicitation 987d8a7e3a7Sitojun * for the corresponding destination. In order to avoid the 988d8a7e3a7Sitojun * confusion, we check if the destination of the route is 989d8a7e3a7Sitojun * a neighbor in terms of neighbor discovery, and stop the 990d8a7e3a7Sitojun * process if not. Additionally, we remove the LLINFO flag 991d8a7e3a7Sitojun * so that ndp(8) will not try to get the neighbor information 992d8a7e3a7Sitojun * of the destination. 993d8a7e3a7Sitojun */ 994d8a7e3a7Sitojun rt->rt_flags &= ~RTF_LLINFO; 995d8a7e3a7Sitojun return; 996d8a7e3a7Sitojun } 997d8a7e3a7Sitojun 998287546eaSitojun switch (req) { 999287546eaSitojun case RTM_ADD: 1000287546eaSitojun /* 1001287546eaSitojun * There is no backward compatibility :) 1002287546eaSitojun * 1003287546eaSitojun * if ((rt->rt_flags & RTF_HOST) == 0 && 1004287546eaSitojun * SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff) 1005287546eaSitojun * rt->rt_flags |= RTF_CLONING; 1006287546eaSitojun */ 1007f4f4d166Sitojun if (rt->rt_flags & (RTF_CLONING | RTF_LLINFO)) { 1008287546eaSitojun /* 1009287546eaSitojun * Case 1: This route should come from 1010287546eaSitojun * a route to interface. RTF_LLINFO flag is set 1011287546eaSitojun * for a host route whose destination should be 1012287546eaSitojun * treated as on-link. 1013287546eaSitojun */ 1014287546eaSitojun rt_setgate(rt, rt_key(rt), 1015287546eaSitojun (struct sockaddr *)&null_sdl); 1016287546eaSitojun gate = rt->rt_gateway; 1017287546eaSitojun SDL(gate)->sdl_type = ifp->if_type; 1018287546eaSitojun SDL(gate)->sdl_index = ifp->if_index; 1019287546eaSitojun if (ln) 1020287546eaSitojun ln->ln_expire = time_second; 1021287546eaSitojun #if 1 1022287546eaSitojun if (ln && ln->ln_expire == 0) { 10230a2c5741Sitojun /* kludge for desktops */ 1024287546eaSitojun #if 0 1025d8a7e3a7Sitojun printf("nd6_rtrequest: time.tv_sec is zero; " 1026287546eaSitojun "treat it as 1\n"); 1027287546eaSitojun #endif 1028287546eaSitojun ln->ln_expire = 1; 1029287546eaSitojun } 1030287546eaSitojun #endif 1031d8a7e3a7Sitojun if ((rt->rt_flags & RTF_CLONING) != 0) 1032287546eaSitojun break; 1033287546eaSitojun } 1034f4f4d166Sitojun /* 1035f4f4d166Sitojun * In IPv4 code, we try to annonuce new RTF_ANNOUNCE entry here. 1036f4f4d166Sitojun * We don't do that here since llinfo is not ready yet. 1037f4f4d166Sitojun * 1038f4f4d166Sitojun * There are also couple of other things to be discussed: 1039f4f4d166Sitojun * - unsolicited NA code needs improvement beforehand 1040f4f4d166Sitojun * - RFC2461 says we MAY send multicast unsolicited NA 1041f4f4d166Sitojun * (7.2.6 paragraph 4), however, it also says that we 1042f4f4d166Sitojun * SHOULD provide a mechanism to prevent multicast NA storm. 1043f4f4d166Sitojun * we don't have anything like it right now. 1044841d7adbSitojun * note that the mechanism needs a mutual agreement 1045f4f4d166Sitojun * between proxies, which means that we need to implement 1046841d7adbSitojun * a new protocol, or a new kludge. 1047841d7adbSitojun * - from RFC2461 6.2.4, host MUST NOT send an unsolicited NA. 1048f4f4d166Sitojun * we need to check ip6forwarding before sending it. 1049f4f4d166Sitojun * (or should we allow proxy ND configuration only for 1050f4f4d166Sitojun * routers? there's no mention about proxy ND from hosts) 1051f4f4d166Sitojun */ 1052f4f4d166Sitojun #if 0 1053f4f4d166Sitojun /* XXX it does not work */ 1054287546eaSitojun if (rt->rt_flags & RTF_ANNOUNCE) 1055287546eaSitojun nd6_na_output(ifp, 1056287546eaSitojun &SIN6(rt_key(rt))->sin6_addr, 1057287546eaSitojun &SIN6(rt_key(rt))->sin6_addr, 1058287546eaSitojun ip6_forwarding ? ND_NA_FLAG_ROUTER : 0, 1059f4f4d166Sitojun 1, NULL); 1060f4f4d166Sitojun #endif 1061287546eaSitojun /* FALLTHROUGH */ 1062287546eaSitojun case RTM_RESOLVE: 1063d8a7e3a7Sitojun if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) { 1064d374aaacSitojun /* 1065d374aaacSitojun * Address resolution isn't necessary for a point to 1066d374aaacSitojun * point link, so we can skip this test for a p2p link. 1067d374aaacSitojun */ 1068287546eaSitojun if (gate->sa_family != AF_LINK || 1069287546eaSitojun gate->sa_len < sizeof(null_sdl)) { 1070d374aaacSitojun log(LOG_DEBUG, 10710a2c5741Sitojun "nd6_rtrequest: bad gateway value: %s\n", 107293036e4eSangelos ifp->if_xname); 1073287546eaSitojun break; 1074287546eaSitojun } 1075287546eaSitojun SDL(gate)->sdl_type = ifp->if_type; 1076287546eaSitojun SDL(gate)->sdl_index = ifp->if_index; 1077d374aaacSitojun } 1078d374aaacSitojun if (ln != NULL) 1079287546eaSitojun break; /* This happens on a route change */ 1080287546eaSitojun /* 1081287546eaSitojun * Case 2: This route may come from cloning, or a manual route 1082287546eaSitojun * add with a LL address. 1083287546eaSitojun */ 1084287546eaSitojun R_Malloc(ln, struct llinfo_nd6 *, sizeof(*ln)); 1085287546eaSitojun rt->rt_llinfo = (caddr_t)ln; 1086287546eaSitojun if (!ln) { 1087287546eaSitojun log(LOG_DEBUG, "nd6_rtrequest: malloc failed\n"); 1088287546eaSitojun break; 1089287546eaSitojun } 1090287546eaSitojun nd6_inuse++; 1091287546eaSitojun nd6_allocated++; 1092287546eaSitojun Bzero(ln, sizeof(*ln)); 1093287546eaSitojun ln->ln_rt = rt; 1094287546eaSitojun /* this is required for "ndp" command. - shin */ 1095287546eaSitojun if (req == RTM_ADD) { 1096287546eaSitojun /* 1097287546eaSitojun * gate should have some valid AF_LINK entry, 1098287546eaSitojun * and ln->ln_expire should have some lifetime 1099287546eaSitojun * which is specified by ndp command. 1100287546eaSitojun */ 1101287546eaSitojun ln->ln_state = ND6_LLINFO_REACHABLE; 1102f6e55599Sitojun ln->ln_byhint = 0; 1103287546eaSitojun } else { 1104287546eaSitojun /* 1105287546eaSitojun * When req == RTM_RESOLVE, rt is created and 1106287546eaSitojun * initialized in rtrequest(), so rt_expire is 0. 1107287546eaSitojun */ 1108287546eaSitojun ln->ln_state = ND6_LLINFO_NOSTATE; 1109287546eaSitojun ln->ln_expire = time_second; 1110287546eaSitojun } 1111287546eaSitojun rt->rt_flags |= RTF_LLINFO; 1112287546eaSitojun ln->ln_next = llinfo_nd6.ln_next; 1113287546eaSitojun llinfo_nd6.ln_next = ln; 1114287546eaSitojun ln->ln_prev = &llinfo_nd6; 1115287546eaSitojun ln->ln_next->ln_prev = ln; 1116287546eaSitojun 1117287546eaSitojun /* 1118287546eaSitojun * check if rt_key(rt) is one of my address assigned 1119287546eaSitojun * to the interface. 1120287546eaSitojun */ 1121287546eaSitojun ifa = (struct ifaddr *)in6ifa_ifpwithaddr(rt->rt_ifp, 1122287546eaSitojun &SIN6(rt_key(rt))->sin6_addr); 1123287546eaSitojun if (ifa) { 1124287546eaSitojun caddr_t macp = nd6_ifptomac(ifp); 1125287546eaSitojun ln->ln_expire = 0; 1126287546eaSitojun ln->ln_state = ND6_LLINFO_REACHABLE; 1127f6e55599Sitojun ln->ln_byhint = 0; 1128d8a7e3a7Sitojun mine = 1; 1129287546eaSitojun if (macp) { 1130287546eaSitojun Bcopy(macp, LLADDR(SDL(gate)), ifp->if_addrlen); 1131287546eaSitojun SDL(gate)->sdl_alen = ifp->if_addrlen; 1132287546eaSitojun } 1133287546eaSitojun if (nd6_useloopback) { 1134fcc641efSmickey rt->rt_ifp = lo0ifp; /*XXX*/ 1135287546eaSitojun /* 1136287546eaSitojun * Make sure rt_ifa be equal to the ifaddr 1137287546eaSitojun * corresponding to the address. 1138287546eaSitojun * We need this because when we refer 1139287546eaSitojun * rt_ifa->ia6_flags in ip6_input, we assume 1140287546eaSitojun * that the rt_ifa points to the address instead 1141287546eaSitojun * of the loopback address. 1142287546eaSitojun */ 1143287546eaSitojun if (ifa != rt->rt_ifa) { 11444f587652Sitojun IFAFREE(rt->rt_ifa); 1145287546eaSitojun ifa->ifa_refcnt++; 1146287546eaSitojun rt->rt_ifa = ifa; 1147287546eaSitojun } 1148287546eaSitojun } 1149f4f4d166Sitojun } else if (rt->rt_flags & RTF_ANNOUNCE) { 1150f4f4d166Sitojun ln->ln_expire = 0; 1151f4f4d166Sitojun ln->ln_state = ND6_LLINFO_REACHABLE; 1152f6e55599Sitojun ln->ln_byhint = 0; 1153f4f4d166Sitojun 1154f4f4d166Sitojun /* join solicited node multicast for proxy ND */ 1155f4f4d166Sitojun if (ifp->if_flags & IFF_MULTICAST) { 1156f4f4d166Sitojun struct in6_addr llsol; 1157f4f4d166Sitojun int error; 1158f4f4d166Sitojun 1159f4f4d166Sitojun llsol = SIN6(rt_key(rt))->sin6_addr; 1160f4f4d166Sitojun llsol.s6_addr16[0] = htons(0xff02); 1161f4f4d166Sitojun llsol.s6_addr16[1] = htons(ifp->if_index); 1162f4f4d166Sitojun llsol.s6_addr32[1] = 0; 1163f4f4d166Sitojun llsol.s6_addr32[2] = htonl(1); 1164f4f4d166Sitojun llsol.s6_addr8[12] = 0xff; 1165f4f4d166Sitojun 1166d8a7e3a7Sitojun if (in6_addmulti(&llsol, ifp, &error)) { 1167d8a7e3a7Sitojun nd6log((LOG_ERR, "%s: failed to join " 1168d8a7e3a7Sitojun "%s (errno=%d)\n", ifp->if_xname, 1169d8a7e3a7Sitojun ip6_sprintf(&llsol), error)); 1170d8a7e3a7Sitojun } 1171f4f4d166Sitojun } 1172287546eaSitojun } 1173287546eaSitojun break; 1174287546eaSitojun 1175287546eaSitojun case RTM_DELETE: 1176287546eaSitojun if (!ln) 1177287546eaSitojun break; 1178f4f4d166Sitojun /* leave from solicited node multicast for proxy ND */ 1179f4f4d166Sitojun if ((rt->rt_flags & RTF_ANNOUNCE) != 0 && 1180f4f4d166Sitojun (ifp->if_flags & IFF_MULTICAST) != 0) { 1181f4f4d166Sitojun struct in6_addr llsol; 1182f4f4d166Sitojun struct in6_multi *in6m; 1183f4f4d166Sitojun 1184f4f4d166Sitojun llsol = SIN6(rt_key(rt))->sin6_addr; 1185f4f4d166Sitojun llsol.s6_addr16[0] = htons(0xff02); 1186f4f4d166Sitojun llsol.s6_addr16[1] = htons(ifp->if_index); 1187f4f4d166Sitojun llsol.s6_addr32[1] = 0; 1188f4f4d166Sitojun llsol.s6_addr32[2] = htonl(1); 1189f4f4d166Sitojun llsol.s6_addr8[12] = 0xff; 1190f4f4d166Sitojun 1191f4f4d166Sitojun IN6_LOOKUP_MULTI(llsol, ifp, in6m); 1192f4f4d166Sitojun if (in6m) 1193f4f4d166Sitojun in6_delmulti(in6m); 1194f4f4d166Sitojun } 1195287546eaSitojun nd6_inuse--; 1196287546eaSitojun ln->ln_next->ln_prev = ln->ln_prev; 1197287546eaSitojun ln->ln_prev->ln_next = ln->ln_next; 1198287546eaSitojun ln->ln_prev = NULL; 1199287546eaSitojun rt->rt_llinfo = 0; 1200287546eaSitojun rt->rt_flags &= ~RTF_LLINFO; 1201287546eaSitojun if (ln->ln_hold) 1202287546eaSitojun m_freem(ln->ln_hold); 1203287546eaSitojun Free((caddr_t)ln); 1204287546eaSitojun } 1205287546eaSitojun } 1206287546eaSitojun 1207287546eaSitojun int 1208287546eaSitojun nd6_ioctl(cmd, data, ifp) 1209287546eaSitojun u_long cmd; 1210287546eaSitojun caddr_t data; 1211287546eaSitojun struct ifnet *ifp; 1212287546eaSitojun { 1213287546eaSitojun struct in6_drlist *drl = (struct in6_drlist *)data; 1214d8a7e3a7Sitojun struct in6_oprlist *oprl = (struct in6_oprlist *)data; 1215287546eaSitojun struct in6_ndireq *ndi = (struct in6_ndireq *)data; 1216287546eaSitojun struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1217f4f4d166Sitojun struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1218d8a7e3a7Sitojun struct nd_defrouter *dr; 1219287546eaSitojun struct nd_prefix *pr; 1220287546eaSitojun struct rtentry *rt; 1221287546eaSitojun int i = 0, error = 0; 1222287546eaSitojun int s; 1223287546eaSitojun 1224287546eaSitojun switch (cmd) { 1225287546eaSitojun case SIOCGDRLST_IN6: 1226d8a7e3a7Sitojun /* 1227d8a7e3a7Sitojun * obsolete API, use sysctl under net.inet6.icmp6 1228d8a7e3a7Sitojun */ 1229287546eaSitojun bzero(drl, sizeof(*drl)); 12306e92dee6Sitojun s = splsoftnet(); 1231f4f4d166Sitojun dr = TAILQ_FIRST(&nd_defrouter); 1232287546eaSitojun while (dr && i < DRLSTSIZ) { 1233287546eaSitojun drl->defrouter[i].rtaddr = dr->rtaddr; 1234287546eaSitojun if (IN6_IS_ADDR_LINKLOCAL(&drl->defrouter[i].rtaddr)) { 1235287546eaSitojun /* XXX: need to this hack for KAME stack */ 1236287546eaSitojun drl->defrouter[i].rtaddr.s6_addr16[1] = 0; 1237f6e55599Sitojun } else 1238287546eaSitojun log(LOG_ERR, 1239287546eaSitojun "default router list contains a " 1240287546eaSitojun "non-linklocal address(%s)\n", 1241287546eaSitojun ip6_sprintf(&drl->defrouter[i].rtaddr)); 1242287546eaSitojun 1243287546eaSitojun drl->defrouter[i].flags = dr->flags; 1244287546eaSitojun drl->defrouter[i].rtlifetime = dr->rtlifetime; 1245287546eaSitojun drl->defrouter[i].expire = dr->expire; 1246287546eaSitojun drl->defrouter[i].if_index = dr->ifp->if_index; 1247287546eaSitojun i++; 1248f4f4d166Sitojun dr = TAILQ_NEXT(dr, dr_entry); 1249287546eaSitojun } 1250287546eaSitojun splx(s); 1251287546eaSitojun break; 1252287546eaSitojun case SIOCGPRLST_IN6: 1253f4f4d166Sitojun /* 1254d8a7e3a7Sitojun * obsolete API, use sysctl under net.inet6.icmp6 1255d8a7e3a7Sitojun * 1256d8a7e3a7Sitojun * XXX the structure in6_prlist was changed in backward- 1257d8a7e3a7Sitojun * incompatible manner. in6_oprlist is used for SIOCGPRLST_IN6, 1258d8a7e3a7Sitojun * in6_prlist is used for nd6_sysctl() - fill_prlist(). 1259d8a7e3a7Sitojun */ 1260d8a7e3a7Sitojun /* 1261f4f4d166Sitojun * XXX meaning of fields, especialy "raflags", is very 1262f4f4d166Sitojun * differnet between RA prefix list and RR/static prefix list. 1263f4f4d166Sitojun * how about separating ioctls into two? 1264f4f4d166Sitojun */ 1265d8a7e3a7Sitojun bzero(oprl, sizeof(*oprl)); 12666e92dee6Sitojun s = splsoftnet(); 1267287546eaSitojun pr = nd_prefix.lh_first; 1268287546eaSitojun while (pr && i < PRLSTSIZ) { 1269287546eaSitojun struct nd_pfxrouter *pfr; 1270287546eaSitojun int j; 1271287546eaSitojun 1272d8a7e3a7Sitojun oprl->prefix[i].prefix = pr->ndpr_prefix.sin6_addr; 1273d8a7e3a7Sitojun oprl->prefix[i].raflags = pr->ndpr_raf; 1274d8a7e3a7Sitojun oprl->prefix[i].prefixlen = pr->ndpr_plen; 1275d8a7e3a7Sitojun oprl->prefix[i].vltime = pr->ndpr_vltime; 1276d8a7e3a7Sitojun oprl->prefix[i].pltime = pr->ndpr_pltime; 1277d8a7e3a7Sitojun oprl->prefix[i].if_index = pr->ndpr_ifp->if_index; 1278d8a7e3a7Sitojun oprl->prefix[i].expire = pr->ndpr_expire; 1279287546eaSitojun 1280287546eaSitojun pfr = pr->ndpr_advrtrs.lh_first; 1281287546eaSitojun j = 0; 1282287546eaSitojun while(pfr) { 1283287546eaSitojun if (j < DRLSTSIZ) { 1284d8a7e3a7Sitojun #define RTRADDR oprl->prefix[i].advrtr[j] 1285287546eaSitojun RTRADDR = pfr->router->rtaddr; 1286287546eaSitojun if (IN6_IS_ADDR_LINKLOCAL(&RTRADDR)) { 1287287546eaSitojun /* XXX: hack for KAME */ 1288287546eaSitojun RTRADDR.s6_addr16[1] = 0; 1289f6e55599Sitojun } else 1290287546eaSitojun log(LOG_ERR, 1291287546eaSitojun "a router(%s) advertises " 1292287546eaSitojun "a prefix with " 1293287546eaSitojun "non-link local address\n", 1294287546eaSitojun ip6_sprintf(&RTRADDR)); 1295287546eaSitojun #undef RTRADDR 1296287546eaSitojun } 1297287546eaSitojun j++; 1298287546eaSitojun pfr = pfr->pfr_next; 1299287546eaSitojun } 1300d8a7e3a7Sitojun oprl->prefix[i].advrtrs = j; 1301d8a7e3a7Sitojun oprl->prefix[i].origin = PR_ORIG_RA; 1302287546eaSitojun 1303287546eaSitojun i++; 1304287546eaSitojun pr = pr->ndpr_next; 1305287546eaSitojun } 1306f4f4d166Sitojun splx(s); 1307287546eaSitojun 1308287546eaSitojun break; 1309d6b9e9b9Sitojun case OSIOCGIFINFO_IN6: 1310d6b9e9b9Sitojun /* XXX: old ndp(8) assumes a positive value for linkmtu. */ 1311191a775dSitojun bzero(&ndi->ndi, sizeof(ndi->ndi)); 1312d6b9e9b9Sitojun ndi->ndi.linkmtu = IN6_LINKMTU(ifp); 1313d6b9e9b9Sitojun ndi->ndi.maxmtu = ND_IFINFO(ifp)->maxmtu; 1314d6b9e9b9Sitojun ndi->ndi.basereachable = ND_IFINFO(ifp)->basereachable; 1315d6b9e9b9Sitojun ndi->ndi.reachable = ND_IFINFO(ifp)->reachable; 1316d6b9e9b9Sitojun ndi->ndi.retrans = ND_IFINFO(ifp)->retrans; 1317d6b9e9b9Sitojun ndi->ndi.flags = ND_IFINFO(ifp)->flags; 1318d6b9e9b9Sitojun ndi->ndi.recalctm = ND_IFINFO(ifp)->recalctm; 1319d6b9e9b9Sitojun ndi->ndi.chlim = ND_IFINFO(ifp)->chlim; 1320cfab95f2Sitojun break; 1321d6b9e9b9Sitojun case SIOCGIFINFO_IN6: 1322d6b9e9b9Sitojun ndi->ndi = *ND_IFINFO(ifp); 1323287546eaSitojun break; 1324d374aaacSitojun case SIOCSIFINFO_FLAGS: 1325d6b9e9b9Sitojun ND_IFINFO(ifp)->flags = ndi->ndi.flags; 1326d374aaacSitojun break; 1327f4f4d166Sitojun case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1328d8a7e3a7Sitojun /* sync kernel routing table with the default router list */ 1329d8a7e3a7Sitojun defrouter_reset(); 1330f4f4d166Sitojun defrouter_select(); 1331287546eaSitojun break; 1332287546eaSitojun case SIOCSPFXFLUSH_IN6: 1333287546eaSitojun { 1334287546eaSitojun /* flush all the prefix advertised by routers */ 1335287546eaSitojun struct nd_prefix *pr, *next; 1336287546eaSitojun 13376e92dee6Sitojun s = splsoftnet(); 1338287546eaSitojun for (pr = nd_prefix.lh_first; pr; pr = next) { 1339d8a7e3a7Sitojun struct in6_ifaddr *ia, *ia_next; 1340d8a7e3a7Sitojun 1341287546eaSitojun next = pr->ndpr_next; 1342d8a7e3a7Sitojun 1343d8a7e3a7Sitojun if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) 1344d8a7e3a7Sitojun continue; /* XXX */ 1345d8a7e3a7Sitojun 1346d8a7e3a7Sitojun /* do we really have to remove addresses as well? */ 1347d8a7e3a7Sitojun for (ia = in6_ifaddr; ia; ia = ia_next) { 1348d8a7e3a7Sitojun /* ia might be removed. keep the next ptr. */ 1349d8a7e3a7Sitojun ia_next = ia->ia_next; 1350d8a7e3a7Sitojun 1351d8a7e3a7Sitojun if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) 1352d8a7e3a7Sitojun continue; 1353d8a7e3a7Sitojun 1354d8a7e3a7Sitojun if (ia->ia6_ndpr == pr) 1355d8a7e3a7Sitojun in6_purgeaddr(&ia->ia_ifa); 1356d8a7e3a7Sitojun } 1357287546eaSitojun prelist_remove(pr); 1358287546eaSitojun } 1359287546eaSitojun splx(s); 1360287546eaSitojun break; 1361287546eaSitojun } 1362287546eaSitojun case SIOCSRTRFLUSH_IN6: 1363287546eaSitojun { 1364287546eaSitojun /* flush all the default routers */ 1365287546eaSitojun struct nd_defrouter *dr, *next; 1366287546eaSitojun 13676e92dee6Sitojun s = splsoftnet(); 1368d8a7e3a7Sitojun defrouter_reset(); 1369d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = next) { 1370f4f4d166Sitojun next = TAILQ_NEXT(dr, dr_entry); 1371287546eaSitojun defrtrlist_del(dr); 1372287546eaSitojun } 1373d8a7e3a7Sitojun defrouter_select(); 1374287546eaSitojun splx(s); 1375287546eaSitojun break; 1376287546eaSitojun } 1377287546eaSitojun case SIOCGNBRINFO_IN6: 1378287546eaSitojun { 1379287546eaSitojun struct llinfo_nd6 *ln; 1380287546eaSitojun struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 1381287546eaSitojun 1382287546eaSitojun /* 1383287546eaSitojun * XXX: KAME specific hack for scoped addresses 1384287546eaSitojun * XXXX: for other scopes than link-local? 1385287546eaSitojun */ 1386287546eaSitojun if (IN6_IS_ADDR_LINKLOCAL(&nbi->addr) || 1387287546eaSitojun IN6_IS_ADDR_MC_LINKLOCAL(&nbi->addr)) { 1388287546eaSitojun u_int16_t *idp = (u_int16_t *)&nb_addr.s6_addr[2]; 1389287546eaSitojun 1390287546eaSitojun if (*idp == 0) 1391287546eaSitojun *idp = htons(ifp->if_index); 1392287546eaSitojun } 1393287546eaSitojun 13946e92dee6Sitojun s = splsoftnet(); 1395d8a7e3a7Sitojun if ((rt = nd6_lookup(&nb_addr, 0, ifp)) == NULL || 1396d8a7e3a7Sitojun (ln = (struct llinfo_nd6 *)rt->rt_llinfo) == NULL) { 1397287546eaSitojun error = EINVAL; 139891e69634Sitojun splx(s); 1399287546eaSitojun break; 1400287546eaSitojun } 1401287546eaSitojun nbi->state = ln->ln_state; 1402287546eaSitojun nbi->asked = ln->ln_asked; 1403287546eaSitojun nbi->isrouter = ln->ln_router; 1404287546eaSitojun nbi->expire = ln->ln_expire; 1405287546eaSitojun splx(s); 1406287546eaSitojun 1407287546eaSitojun break; 1408287546eaSitojun } 1409f4f4d166Sitojun case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1410f4f4d166Sitojun ndif->ifindex = nd6_defifindex; 1411f4f4d166Sitojun break; 1412f4f4d166Sitojun case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1413f4f4d166Sitojun return (nd6_setdefaultiface(ndif->ifindex)); 1414f4f4d166Sitojun break; 1415287546eaSitojun } 1416287546eaSitojun return (error); 1417287546eaSitojun } 1418287546eaSitojun 1419287546eaSitojun /* 1420287546eaSitojun * Create neighbor cache entry and cache link-layer address, 1421287546eaSitojun * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 1422287546eaSitojun */ 1423287546eaSitojun struct rtentry * 1424287546eaSitojun nd6_cache_lladdr(ifp, from, lladdr, lladdrlen, type, code) 1425287546eaSitojun struct ifnet *ifp; 1426287546eaSitojun struct in6_addr *from; 1427287546eaSitojun char *lladdr; 1428287546eaSitojun int lladdrlen; 1429287546eaSitojun int type; /* ICMP6 type */ 1430287546eaSitojun int code; /* type dependent information */ 1431287546eaSitojun { 1432287546eaSitojun struct rtentry *rt = NULL; 1433287546eaSitojun struct llinfo_nd6 *ln = NULL; 1434287546eaSitojun int is_newentry; 1435287546eaSitojun struct sockaddr_dl *sdl = NULL; 1436287546eaSitojun int do_update; 1437287546eaSitojun int olladdr; 1438287546eaSitojun int llchange; 1439287546eaSitojun int newstate = 0; 1440287546eaSitojun long time_second = time.tv_sec; 1441287546eaSitojun 1442287546eaSitojun if (!ifp) 1443287546eaSitojun panic("ifp == NULL in nd6_cache_lladdr"); 1444287546eaSitojun if (!from) 1445287546eaSitojun panic("from == NULL in nd6_cache_lladdr"); 1446287546eaSitojun 1447287546eaSitojun /* nothing must be updated for unspecified address */ 1448287546eaSitojun if (IN6_IS_ADDR_UNSPECIFIED(from)) 1449287546eaSitojun return NULL; 1450287546eaSitojun 1451287546eaSitojun /* 1452287546eaSitojun * Validation about ifp->if_addrlen and lladdrlen must be done in 1453287546eaSitojun * the caller. 1454287546eaSitojun * 1455287546eaSitojun * XXX If the link does not have link-layer adderss, what should 1456287546eaSitojun * we do? (ifp->if_addrlen == 0) 1457287546eaSitojun * Spec says nothing in sections for RA, RS and NA. There's small 1458287546eaSitojun * description on it in NS section (RFC 2461 7.2.3). 1459287546eaSitojun */ 1460287546eaSitojun 1461287546eaSitojun rt = nd6_lookup(from, 0, ifp); 1462287546eaSitojun if (!rt) { 1463287546eaSitojun #if 0 1464287546eaSitojun /* nothing must be done if there's no lladdr */ 1465287546eaSitojun if (!lladdr || !lladdrlen) 1466287546eaSitojun return NULL; 1467287546eaSitojun #endif 1468287546eaSitojun 1469287546eaSitojun rt = nd6_lookup(from, 1, ifp); 1470287546eaSitojun is_newentry = 1; 14710a2c5741Sitojun } else { 14720a2c5741Sitojun /* do nothing if static ndp is set */ 14730a2c5741Sitojun if (rt->rt_flags & RTF_STATIC) 14740a2c5741Sitojun return NULL; 1475287546eaSitojun is_newentry = 0; 14760a2c5741Sitojun } 1477287546eaSitojun 1478287546eaSitojun if (!rt) 1479287546eaSitojun return NULL; 1480287546eaSitojun if ((rt->rt_flags & (RTF_GATEWAY | RTF_LLINFO)) != RTF_LLINFO) { 1481287546eaSitojun fail: 1482d8a7e3a7Sitojun (void)nd6_free(rt, 0); 1483287546eaSitojun return NULL; 1484287546eaSitojun } 1485287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1486287546eaSitojun if (!ln) 1487287546eaSitojun goto fail; 1488287546eaSitojun if (!rt->rt_gateway) 1489287546eaSitojun goto fail; 1490287546eaSitojun if (rt->rt_gateway->sa_family != AF_LINK) 1491287546eaSitojun goto fail; 1492287546eaSitojun sdl = SDL(rt->rt_gateway); 1493287546eaSitojun 1494287546eaSitojun olladdr = (sdl->sdl_alen) ? 1 : 0; 1495287546eaSitojun if (olladdr && lladdr) { 1496287546eaSitojun if (bcmp(lladdr, LLADDR(sdl), ifp->if_addrlen)) 1497287546eaSitojun llchange = 1; 1498287546eaSitojun else 1499287546eaSitojun llchange = 0; 1500287546eaSitojun } else 1501287546eaSitojun llchange = 0; 1502287546eaSitojun 1503287546eaSitojun /* 1504287546eaSitojun * newentry olladdr lladdr llchange (*=record) 1505287546eaSitojun * 0 n n -- (1) 1506287546eaSitojun * 0 y n -- (2) 1507287546eaSitojun * 0 n y -- (3) * STALE 1508287546eaSitojun * 0 y y n (4) * 1509287546eaSitojun * 0 y y y (5) * STALE 1510287546eaSitojun * 1 -- n -- (6) NOSTATE(= PASSIVE) 1511287546eaSitojun * 1 -- y -- (7) * STALE 1512287546eaSitojun */ 1513287546eaSitojun 1514287546eaSitojun if (lladdr) { /* (3-5) and (7) */ 1515287546eaSitojun /* 1516287546eaSitojun * Record source link-layer address 1517287546eaSitojun * XXX is it dependent to ifp->if_type? 1518287546eaSitojun */ 1519287546eaSitojun sdl->sdl_alen = ifp->if_addrlen; 1520287546eaSitojun bcopy(lladdr, LLADDR(sdl), ifp->if_addrlen); 1521287546eaSitojun } 1522287546eaSitojun 1523287546eaSitojun if (!is_newentry) { 1524d8a7e3a7Sitojun if ((!olladdr && lladdr) || /* (3) */ 1525d8a7e3a7Sitojun (olladdr && lladdr && llchange)) { /* (5) */ 1526287546eaSitojun do_update = 1; 1527287546eaSitojun newstate = ND6_LLINFO_STALE; 1528287546eaSitojun } else /* (1-2,4) */ 1529287546eaSitojun do_update = 0; 1530287546eaSitojun } else { 1531287546eaSitojun do_update = 1; 1532287546eaSitojun if (!lladdr) /* (6) */ 1533287546eaSitojun newstate = ND6_LLINFO_NOSTATE; 1534287546eaSitojun else /* (7) */ 1535287546eaSitojun newstate = ND6_LLINFO_STALE; 1536287546eaSitojun } 1537287546eaSitojun 1538287546eaSitojun if (do_update) { 1539287546eaSitojun /* 1540287546eaSitojun * Update the state of the neighbor cache. 1541287546eaSitojun */ 1542287546eaSitojun ln->ln_state = newstate; 1543287546eaSitojun 1544287546eaSitojun if (ln->ln_state == ND6_LLINFO_STALE) { 15458a7bb304Sitojun /* 15468a7bb304Sitojun * XXX: since nd6_output() below will cause 15478a7bb304Sitojun * state tansition to DELAY and reset the timer, 15488a7bb304Sitojun * we must set the timer now, although it is actually 15498a7bb304Sitojun * meaningless. 15508a7bb304Sitojun */ 15518a7bb304Sitojun ln->ln_expire = time_second + nd6_gctimer; 15528a7bb304Sitojun 1553287546eaSitojun if (ln->ln_hold) { 15546afad192Sitojun /* 15556afad192Sitojun * we assume ifp is not a p2p here, so just 15566afad192Sitojun * set the 2nd argument as the 1st one. 15576afad192Sitojun */ 15586afad192Sitojun nd6_output(ifp, ifp, ln->ln_hold, 1559d8a7e3a7Sitojun (struct sockaddr_in6 *)rt_key(rt), rt); 15608a7bb304Sitojun ln->ln_hold = NULL; 1561287546eaSitojun } 1562287546eaSitojun } else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) { 1563287546eaSitojun /* probe right away */ 1564287546eaSitojun ln->ln_expire = time_second; 1565287546eaSitojun } 1566287546eaSitojun } 1567287546eaSitojun 1568287546eaSitojun /* 1569287546eaSitojun * ICMP6 type dependent behavior. 1570287546eaSitojun * 1571287546eaSitojun * NS: clear IsRouter if new entry 1572287546eaSitojun * RS: clear IsRouter 1573287546eaSitojun * RA: set IsRouter if there's lladdr 1574287546eaSitojun * redir: clear IsRouter if new entry 1575287546eaSitojun * 1576287546eaSitojun * RA case, (1): 1577287546eaSitojun * The spec says that we must set IsRouter in the following cases: 1578287546eaSitojun * - If lladdr exist, set IsRouter. This means (1-5). 1579287546eaSitojun * - If it is old entry (!newentry), set IsRouter. This means (7). 1580287546eaSitojun * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 1581287546eaSitojun * A quetion arises for (1) case. (1) case has no lladdr in the 1582287546eaSitojun * neighbor cache, this is similar to (6). 1583287546eaSitojun * This case is rare but we figured that we MUST NOT set IsRouter. 1584287546eaSitojun * 1585287546eaSitojun * newentry olladdr lladdr llchange NS RS RA redir 1586287546eaSitojun * D R 1587287546eaSitojun * 0 n n -- (1) c ? s 1588287546eaSitojun * 0 y n -- (2) c s s 1589287546eaSitojun * 0 n y -- (3) c s s 1590287546eaSitojun * 0 y y n (4) c s s 1591287546eaSitojun * 0 y y y (5) c s s 1592287546eaSitojun * 1 -- n -- (6) c c c s 1593287546eaSitojun * 1 -- y -- (7) c c s c s 1594287546eaSitojun * 1595287546eaSitojun * (c=clear s=set) 1596287546eaSitojun */ 1597287546eaSitojun switch (type & 0xff) { 1598287546eaSitojun case ND_NEIGHBOR_SOLICIT: 1599287546eaSitojun /* 1600287546eaSitojun * New entry must have is_router flag cleared. 1601287546eaSitojun */ 1602287546eaSitojun if (is_newentry) /* (6-7) */ 1603287546eaSitojun ln->ln_router = 0; 1604287546eaSitojun break; 1605287546eaSitojun case ND_REDIRECT: 1606287546eaSitojun /* 1607287546eaSitojun * If the icmp is a redirect to a better router, always set the 1608287546eaSitojun * is_router flag. Otherwise, if the entry is newly created, 1609287546eaSitojun * clear the flag. [RFC 2461, sec 8.3] 1610287546eaSitojun */ 1611287546eaSitojun if (code == ND_REDIRECT_ROUTER) 1612287546eaSitojun ln->ln_router = 1; 1613287546eaSitojun else if (is_newentry) /* (6-7) */ 1614287546eaSitojun ln->ln_router = 0; 1615287546eaSitojun break; 1616287546eaSitojun case ND_ROUTER_SOLICIT: 1617287546eaSitojun /* 1618287546eaSitojun * is_router flag must always be cleared. 1619287546eaSitojun */ 1620287546eaSitojun ln->ln_router = 0; 1621287546eaSitojun break; 1622287546eaSitojun case ND_ROUTER_ADVERT: 1623287546eaSitojun /* 1624287546eaSitojun * Mark an entry with lladdr as a router. 1625287546eaSitojun */ 1626d8a7e3a7Sitojun if ((!is_newentry && (olladdr || lladdr)) || /* (2-5) */ 1627d8a7e3a7Sitojun (is_newentry && lladdr)) { /* (7) */ 1628287546eaSitojun ln->ln_router = 1; 1629287546eaSitojun } 1630287546eaSitojun break; 1631287546eaSitojun } 1632287546eaSitojun 163350ccc024Sitojun /* 163450ccc024Sitojun * When the link-layer address of a router changes, select the 163550ccc024Sitojun * best router again. In particular, when the neighbor entry is newly 163650ccc024Sitojun * created, it might affect the selection policy. 163750ccc024Sitojun * Question: can we restrict the first condition to the "is_newentry" 163850ccc024Sitojun * case? 163950ccc024Sitojun * XXX: when we hear an RA from a new router with the link-layer 164050ccc024Sitojun * address option, defrouter_select() is called twice, since 164150ccc024Sitojun * defrtrlist_update called the function as well. However, I believe 164250ccc024Sitojun * we can compromise the overhead, since it only happens the first 164350ccc024Sitojun * time. 1644d8a7e3a7Sitojun * XXX: although defrouter_select() should not have a bad effect 1645d8a7e3a7Sitojun * for those are not autoconfigured hosts, we explicitly avoid such 1646d8a7e3a7Sitojun * cases for safety. 164750ccc024Sitojun */ 164829ee75acSitojun if (do_update && ln->ln_router && !ip6_forwarding && ip6_accept_rtadv) 164950ccc024Sitojun defrouter_select(); 165050ccc024Sitojun 1651287546eaSitojun return rt; 1652287546eaSitojun } 1653287546eaSitojun 1654287546eaSitojun static void 1655287546eaSitojun nd6_slowtimo(ignored_arg) 1656287546eaSitojun void *ignored_arg; 1657287546eaSitojun { 16586e92dee6Sitojun int s = splsoftnet(); 1659b3c1e4c1Sitojun struct nd_ifinfo *nd6if; 1660d6b9e9b9Sitojun struct ifnet *ifp; 1661287546eaSitojun 1662b3c1e4c1Sitojun timeout_set(&nd6_slowtimo_ch, nd6_slowtimo, NULL); 1663b3c1e4c1Sitojun timeout_add(&nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz); 1664d6b9e9b9Sitojun for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 1665d6b9e9b9Sitojun { 1666d6b9e9b9Sitojun nd6if = ND_IFINFO(ifp); 1667287546eaSitojun if (nd6if->basereachable && /* already initialized */ 1668287546eaSitojun (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 1669287546eaSitojun /* 1670287546eaSitojun * Since reachable time rarely changes by router 1671287546eaSitojun * advertisements, we SHOULD insure that a new random 1672287546eaSitojun * value gets recomputed at least once every few hours. 1673287546eaSitojun * (RFC 2461, 6.3.4) 1674287546eaSitojun */ 1675287546eaSitojun nd6if->recalctm = nd6_recalc_reachtm_interval; 1676287546eaSitojun nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 1677287546eaSitojun } 1678287546eaSitojun } 1679287546eaSitojun splx(s); 1680287546eaSitojun } 1681287546eaSitojun 1682287546eaSitojun #define senderr(e) { error = (e); goto bad;} 1683287546eaSitojun int 16846afad192Sitojun nd6_output(ifp, origifp, m0, dst, rt0) 1685b3c1e4c1Sitojun struct ifnet *ifp; 16866afad192Sitojun struct ifnet *origifp; 1687287546eaSitojun struct mbuf *m0; 1688287546eaSitojun struct sockaddr_in6 *dst; 1689287546eaSitojun struct rtentry *rt0; 1690287546eaSitojun { 1691b3c1e4c1Sitojun struct mbuf *m = m0; 1692b3c1e4c1Sitojun struct rtentry *rt = rt0; 1693cfb6b8dfSitojun struct sockaddr_in6 *gw6 = NULL; 1694287546eaSitojun struct llinfo_nd6 *ln = NULL; 1695287546eaSitojun int error = 0; 1696287546eaSitojun long time_second = time.tv_sec; 1697cb39d30aSangelos #ifdef IPSEC 1698cb39d30aSangelos struct m_tag *mtag; 1699cb39d30aSangelos #endif /* IPSEC */ 1700287546eaSitojun 1701287546eaSitojun if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr)) 1702287546eaSitojun goto sendpkt; 1703287546eaSitojun 1704d8a7e3a7Sitojun if (nd6_need_cache(ifp) == 0) 1705287546eaSitojun goto sendpkt; 1706287546eaSitojun 1707287546eaSitojun /* 1708287546eaSitojun * next hop determination. This routine is derived from ether_outpout. 1709287546eaSitojun */ 1710287546eaSitojun if (rt) { 1711287546eaSitojun if ((rt->rt_flags & RTF_UP) == 0) { 1712d8a7e3a7Sitojun if ((rt0 = rt = rtalloc1((struct sockaddr *)dst, 1713d8a7e3a7Sitojun 1)) != NULL) 1714287546eaSitojun { 1715287546eaSitojun rt->rt_refcnt--; 17166afad192Sitojun if (rt->rt_ifp != ifp) { 17176afad192Sitojun /* XXX: loop care? */ 17186afad192Sitojun return nd6_output(ifp, origifp, m0, 17196afad192Sitojun dst, rt); 17206afad192Sitojun } 1721287546eaSitojun } else 1722287546eaSitojun senderr(EHOSTUNREACH); 1723287546eaSitojun } 1724cfb6b8dfSitojun 1725287546eaSitojun if (rt->rt_flags & RTF_GATEWAY) { 1726cfb6b8dfSitojun gw6 = (struct sockaddr_in6 *)rt->rt_gateway; 1727cfb6b8dfSitojun 1728cfb6b8dfSitojun /* 1729cfb6b8dfSitojun * We skip link-layer address resolution and NUD 1730cfb6b8dfSitojun * if the gateway is not a neighbor from ND point 1731d8a7e3a7Sitojun * of view, regardless of the value of nd_ifinfo.flags. 173234deef1eSitojun * The second condition is a bit tricky; we skip 1733cfb6b8dfSitojun * if the gateway is our own address, which is 1734cfb6b8dfSitojun * sometimes used to install a route to a p2p link. 1735cfb6b8dfSitojun */ 1736cfb6b8dfSitojun if (!nd6_is_addr_neighbor(gw6, ifp) || 1737cfb6b8dfSitojun in6ifa_ifpwithaddr(ifp, &gw6->sin6_addr)) { 1738cfb6b8dfSitojun /* 1739cfb6b8dfSitojun * We allow this kind of tricky route only 1740cfb6b8dfSitojun * when the outgoing interface is p2p. 1741cfb6b8dfSitojun * XXX: we may need a more generic rule here. 1742cfb6b8dfSitojun */ 1743cfb6b8dfSitojun if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1744cfb6b8dfSitojun senderr(EHOSTUNREACH); 1745cfb6b8dfSitojun 1746cfb6b8dfSitojun goto sendpkt; 1747cfb6b8dfSitojun } 1748cfb6b8dfSitojun 1749287546eaSitojun if (rt->rt_gwroute == 0) 1750287546eaSitojun goto lookup; 1751287546eaSitojun if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 1752287546eaSitojun rtfree(rt); rt = rt0; 1753d8a7e3a7Sitojun lookup: 1754d8a7e3a7Sitojun rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 1755287546eaSitojun if ((rt = rt->rt_gwroute) == 0) 1756287546eaSitojun senderr(EHOSTUNREACH); 1757287546eaSitojun } 1758287546eaSitojun } 1759287546eaSitojun } 1760287546eaSitojun 1761287546eaSitojun /* 1762287546eaSitojun * Address resolution or Neighbor Unreachability Detection 1763287546eaSitojun * for the next hop. 1764287546eaSitojun * At this point, the destination of the packet must be a unicast 1765287546eaSitojun * or an anycast address(i.e. not a multicast). 1766287546eaSitojun */ 1767287546eaSitojun 1768287546eaSitojun /* Look up the neighbor cache for the nexthop */ 1769287546eaSitojun if (rt && (rt->rt_flags & RTF_LLINFO) != 0) 1770287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1771287546eaSitojun else { 1772cfb6b8dfSitojun /* 1773cfb6b8dfSitojun * Since nd6_is_addr_neighbor() internally calls nd6_lookup(), 1774cfb6b8dfSitojun * the condition below is not very efficient. But we believe 1775cfb6b8dfSitojun * it is tolerable, because this should be a rare case. 1776cfb6b8dfSitojun */ 1777cfb6b8dfSitojun if (nd6_is_addr_neighbor(dst, ifp) && 1778cfb6b8dfSitojun (rt = nd6_lookup(&dst->sin6_addr, 1, ifp)) != NULL) 1779287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1780287546eaSitojun } 1781287546eaSitojun if (!ln || !rt) { 1782cfb6b8dfSitojun if ((ifp->if_flags & IFF_POINTOPOINT) == 0 && 1783d6b9e9b9Sitojun !(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) { 1784cfb6b8dfSitojun log(LOG_DEBUG, 1785cfb6b8dfSitojun "nd6_output: can't allocate llinfo for %s " 1786287546eaSitojun "(ln=%p, rt=%p)\n", 1787287546eaSitojun ip6_sprintf(&dst->sin6_addr), ln, rt); 1788287546eaSitojun senderr(EIO); /* XXX: good error? */ 1789287546eaSitojun } 1790287546eaSitojun 1791cfb6b8dfSitojun goto sendpkt; /* send anyway */ 1792cfb6b8dfSitojun } 1793cfb6b8dfSitojun 1794d374aaacSitojun /* We don't have to do link-layer address resolution on a p2p link. */ 1795d374aaacSitojun if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 1796be4e9e12Sitojun ln->ln_state < ND6_LLINFO_REACHABLE) { 1797d374aaacSitojun ln->ln_state = ND6_LLINFO_STALE; 1798be4e9e12Sitojun ln->ln_expire = time_second + nd6_gctimer; 1799be4e9e12Sitojun } 1800287546eaSitojun 1801287546eaSitojun /* 1802287546eaSitojun * The first time we send a packet to a neighbor whose entry is 1803287546eaSitojun * STALE, we have to change the state to DELAY and a sets a timer to 1804287546eaSitojun * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 1805287546eaSitojun * neighbor unreachability detection on expiration. 1806287546eaSitojun * (RFC 2461 7.3.3) 1807287546eaSitojun */ 1808287546eaSitojun if (ln->ln_state == ND6_LLINFO_STALE) { 1809287546eaSitojun ln->ln_asked = 0; 1810287546eaSitojun ln->ln_state = ND6_LLINFO_DELAY; 1811287546eaSitojun ln->ln_expire = time_second + nd6_delay; 1812287546eaSitojun } 1813287546eaSitojun 1814287546eaSitojun /* 1815287546eaSitojun * If the neighbor cache entry has a state other than INCOMPLETE 181634deef1eSitojun * (i.e. its link-layer address is already resolved), just 1817287546eaSitojun * send the packet. 1818287546eaSitojun */ 1819287546eaSitojun if (ln->ln_state > ND6_LLINFO_INCOMPLETE) 1820287546eaSitojun goto sendpkt; 1821287546eaSitojun 1822287546eaSitojun /* 1823287546eaSitojun * There is a neighbor cache entry, but no ethernet address 1824287546eaSitojun * response yet. Replace the held mbuf (if any) with this 1825287546eaSitojun * latest one. 1826287546eaSitojun */ 1827efcf292bSitojun if (ln->ln_state == ND6_LLINFO_NOSTATE) 1828287546eaSitojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 1829287546eaSitojun if (ln->ln_hold) 1830287546eaSitojun m_freem(ln->ln_hold); 1831287546eaSitojun ln->ln_hold = m; 183276843262Sitojun /* 183376843262Sitojun * If there has been no NS for the neighbor after entering the 183476843262Sitojun * INCOMPLETE state, send the first solicitation. 183576843262Sitojun * Technically this can be against the rate-limiting rule described in 183676843262Sitojun * Section 7.2.2 of RFC 2461 because the interval to the next scheduled 183776843262Sitojun * solicitation issued in nd6_timer() may be less than the specified 183876843262Sitojun * retransmission time. This should not be a problem from a practical 183976843262Sitojun * point of view, because we'll typically see an immediate response 184076843262Sitojun * from the neighbor, which suppresses the succeeding solicitations. 184176843262Sitojun */ 184276843262Sitojun if (ln->ln_expire && ln->ln_asked == 0) { 1843287546eaSitojun ln->ln_asked++; 1844287546eaSitojun ln->ln_expire = time_second + 1845d6b9e9b9Sitojun ND6_RETRANS_SEC(ND_IFINFO(ifp)->retrans); 1846287546eaSitojun nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0); 1847287546eaSitojun } 1848287546eaSitojun return (0); 1849287546eaSitojun 1850287546eaSitojun sendpkt: 1851cb39d30aSangelos #ifdef IPSEC 1852cb39d30aSangelos /* 1853cb39d30aSangelos * If the packet needs outgoing IPsec crypto processing and the 1854cb39d30aSangelos * interface doesn't support it, drop it. 1855cb39d30aSangelos */ 1856cb39d30aSangelos mtag = m_tag_find(m, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL); 1857cb39d30aSangelos #endif /* IPSEC */ 18586afad192Sitojun 18590a2c5741Sitojun if ((ifp->if_flags & IFF_LOOPBACK) != 0) { 1860cb39d30aSangelos #ifdef IPSEC 1861cb39d30aSangelos if (mtag != NULL && 1862cb39d30aSangelos (origifp->if_capabilities & IFCAP_IPSEC) == 0) { 1863cb39d30aSangelos /* Tell IPsec to do its own crypto. */ 1864cb39d30aSangelos ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 1865cb39d30aSangelos error = EACCES; 1866cb39d30aSangelos goto bad; 1867cb39d30aSangelos } 1868cb39d30aSangelos #endif /* IPSEC */ 18696afad192Sitojun return ((*ifp->if_output)(origifp, m, (struct sockaddr *)dst, 18706afad192Sitojun rt)); 18716afad192Sitojun } 1872cb39d30aSangelos #ifdef IPSEC 1873cb39d30aSangelos if (mtag != NULL && 1874cb39d30aSangelos (ifp->if_capabilities & IFCAP_IPSEC) == 0) { 1875cb39d30aSangelos /* Tell IPsec to do its own crypto. */ 1876cb39d30aSangelos ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 1877cb39d30aSangelos error = EACCES; 1878cb39d30aSangelos goto bad; 1879cb39d30aSangelos } 1880cb39d30aSangelos #endif /* IPSEC */ 1881287546eaSitojun return ((*ifp->if_output)(ifp, m, (struct sockaddr *)dst, rt)); 1882287546eaSitojun 1883287546eaSitojun bad: 1884287546eaSitojun if (m) 1885287546eaSitojun m_freem(m); 1886287546eaSitojun return (error); 1887287546eaSitojun } 1888287546eaSitojun #undef senderr 1889287546eaSitojun 1890287546eaSitojun int 1891d8a7e3a7Sitojun nd6_need_cache(ifp) 1892d8a7e3a7Sitojun struct ifnet *ifp; 1893d8a7e3a7Sitojun { 1894d8a7e3a7Sitojun /* 1895d8a7e3a7Sitojun * XXX: we currently do not make neighbor cache on any interface 1896d8a7e3a7Sitojun * other than ARCnet, Ethernet, FDDI and GIF. 1897d8a7e3a7Sitojun * 1898d8a7e3a7Sitojun * RFC2893 says: 1899d8a7e3a7Sitojun * - unidirectional tunnels needs no ND 1900d8a7e3a7Sitojun */ 1901d8a7e3a7Sitojun switch (ifp->if_type) { 1902d8a7e3a7Sitojun case IFT_ARCNET: 1903d8a7e3a7Sitojun case IFT_ETHER: 1904d8a7e3a7Sitojun case IFT_FDDI: 1905d8a7e3a7Sitojun case IFT_IEEE1394: 1906d8a7e3a7Sitojun case IFT_PROPVIRTUAL: 1907d8a7e3a7Sitojun case IFT_L2VLAN: 1908d8a7e3a7Sitojun case IFT_IEEE80211: 1909d8a7e3a7Sitojun case IFT_GIF: /* XXX need more cases? */ 1910d8a7e3a7Sitojun return (1); 1911d8a7e3a7Sitojun default: 1912d8a7e3a7Sitojun return (0); 1913d8a7e3a7Sitojun } 1914d8a7e3a7Sitojun } 1915d8a7e3a7Sitojun 1916d8a7e3a7Sitojun int 1917287546eaSitojun nd6_storelladdr(ifp, rt, m, dst, desten) 1918287546eaSitojun struct ifnet *ifp; 1919287546eaSitojun struct rtentry *rt; 1920287546eaSitojun struct mbuf *m; 1921287546eaSitojun struct sockaddr *dst; 1922287546eaSitojun u_char *desten; 1923287546eaSitojun { 1924287546eaSitojun struct sockaddr_dl *sdl; 1925287546eaSitojun 1926287546eaSitojun if (m->m_flags & M_MCAST) { 1927287546eaSitojun switch (ifp->if_type) { 1928287546eaSitojun case IFT_ETHER: 1929287546eaSitojun case IFT_FDDI: 1930287546eaSitojun ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr, 1931287546eaSitojun desten); 1932287546eaSitojun return (1); 1933287546eaSitojun break; 1934287546eaSitojun case IFT_ARCNET: 1935287546eaSitojun *desten = 0; 1936287546eaSitojun return (1); 1937287546eaSitojun default: 19380a2c5741Sitojun m_freem(m); 1939287546eaSitojun return (0); 1940287546eaSitojun } 1941287546eaSitojun } 1942287546eaSitojun 194372e30262Sitojun if (rt == NULL) { 194472e30262Sitojun /* this could happen, if we could not allocate memory */ 19450a2c5741Sitojun m_freem(m); 194672e30262Sitojun return (0); 194772e30262Sitojun } 194872e30262Sitojun if (rt->rt_gateway->sa_family != AF_LINK) { 1949287546eaSitojun printf("nd6_storelladdr: something odd happens\n"); 19500a2c5741Sitojun m_freem(m); 1951287546eaSitojun return (0); 1952287546eaSitojun } 1953287546eaSitojun sdl = SDL(rt->rt_gateway); 1954b4ee66fcSitojun if (sdl->sdl_alen == 0) { 1955bd2806bcSitojun /* this should be impossible, but we bark here for debugging */ 1956d8a7e3a7Sitojun printf("nd6_storelladdr: sdl_alen == 0, dst=%s, if=%s\n", 1957d8a7e3a7Sitojun ip6_sprintf(&SIN6(dst)->sin6_addr), ifp->if_xname); 19580a2c5741Sitojun m_freem(m); 1959b4ee66fcSitojun return (0); 1960b4ee66fcSitojun } 1961287546eaSitojun 1962b4ee66fcSitojun bcopy(LLADDR(sdl), desten, sdl->sdl_alen); 1963287546eaSitojun return (1); 1964287546eaSitojun } 1965d8a7e3a7Sitojun 1966d8a7e3a7Sitojun int 1967d8a7e3a7Sitojun nd6_sysctl(name, oldp, oldlenp, newp, newlen) 1968d8a7e3a7Sitojun int name; 1969db3db419Sitojun void *oldp; /* syscall arg, need copyout */ 1970d8a7e3a7Sitojun size_t *oldlenp; 1971db3db419Sitojun void *newp; /* syscall arg, need copyin */ 1972d8a7e3a7Sitojun size_t newlen; 1973d8a7e3a7Sitojun { 1974db3db419Sitojun void *p; 1975d8a7e3a7Sitojun size_t ol, l; 1976d8a7e3a7Sitojun int error; 1977d8a7e3a7Sitojun 1978d8a7e3a7Sitojun error = 0; 1979d8a7e3a7Sitojun l = 0; 1980d8a7e3a7Sitojun 1981d8a7e3a7Sitojun if (newp) 1982d8a7e3a7Sitojun return EPERM; 1983d8a7e3a7Sitojun if (oldp && !oldlenp) 1984d8a7e3a7Sitojun return EINVAL; 1985d8a7e3a7Sitojun ol = oldlenp ? *oldlenp : 0; 1986d8a7e3a7Sitojun 1987db3db419Sitojun if (oldp) { 1988db3db419Sitojun p = malloc(*oldlenp, M_TEMP, M_WAITOK); 1989db3db419Sitojun if (!p) 1990db3db419Sitojun return ENOMEM; 1991db3db419Sitojun } else 1992db3db419Sitojun p = NULL; 1993d8a7e3a7Sitojun switch (name) { 1994d8a7e3a7Sitojun case ICMPV6CTL_ND6_DRLIST: 1995db3db419Sitojun error = fill_drlist(p, oldlenp, ol); 1996db3db419Sitojun if (!error && p && oldp) 1997732568ffSitojun error = copyout(p, oldp, *oldlenp); 1998d8a7e3a7Sitojun break; 1999d8a7e3a7Sitojun 2000d8a7e3a7Sitojun case ICMPV6CTL_ND6_PRLIST: 2001db3db419Sitojun error = fill_prlist(p, oldlenp, ol); 2002db3db419Sitojun if (!error && p && oldp) 2003732568ffSitojun error = copyout(p, oldp, *oldlenp); 2004d8a7e3a7Sitojun break; 2005d8a7e3a7Sitojun 2006d8a7e3a7Sitojun default: 2007d8a7e3a7Sitojun error = ENOPROTOOPT; 2008d8a7e3a7Sitojun break; 2009d8a7e3a7Sitojun } 2010db3db419Sitojun if (p) 2011db3db419Sitojun free(p, M_TEMP); 2012d8a7e3a7Sitojun 2013d8a7e3a7Sitojun return (error); 2014d8a7e3a7Sitojun } 2015d8a7e3a7Sitojun 2016d8a7e3a7Sitojun static int 2017d8a7e3a7Sitojun fill_drlist(oldp, oldlenp, ol) 2018d8a7e3a7Sitojun void *oldp; 2019d8a7e3a7Sitojun size_t *oldlenp, ol; 2020d8a7e3a7Sitojun { 2021d8a7e3a7Sitojun int error = 0, s; 2022d8a7e3a7Sitojun struct in6_defrouter *d = NULL, *de = NULL; 2023d8a7e3a7Sitojun struct nd_defrouter *dr; 2024d8a7e3a7Sitojun size_t l; 2025d8a7e3a7Sitojun 20266e92dee6Sitojun s = splsoftnet(); 2027d8a7e3a7Sitojun 2028d8a7e3a7Sitojun if (oldp) { 2029d8a7e3a7Sitojun d = (struct in6_defrouter *)oldp; 2030d8a7e3a7Sitojun de = (struct in6_defrouter *)((caddr_t)oldp + *oldlenp); 2031d8a7e3a7Sitojun } 2032d8a7e3a7Sitojun l = 0; 2033d8a7e3a7Sitojun 2034d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; 2035d8a7e3a7Sitojun dr = TAILQ_NEXT(dr, dr_entry)) { 2036d8a7e3a7Sitojun 2037d8a7e3a7Sitojun if (oldp && d + 1 <= de) { 2038d8a7e3a7Sitojun bzero(d, sizeof(*d)); 2039d8a7e3a7Sitojun d->rtaddr.sin6_family = AF_INET6; 2040d8a7e3a7Sitojun d->rtaddr.sin6_len = sizeof(struct sockaddr_in6); 2041d8a7e3a7Sitojun d->rtaddr.sin6_addr = dr->rtaddr; 2042d8a7e3a7Sitojun in6_recoverscope(&d->rtaddr, &d->rtaddr.sin6_addr, 2043d8a7e3a7Sitojun dr->ifp); 2044d8a7e3a7Sitojun d->flags = dr->flags; 2045d8a7e3a7Sitojun d->rtlifetime = dr->rtlifetime; 2046d8a7e3a7Sitojun d->expire = dr->expire; 2047d8a7e3a7Sitojun d->if_index = dr->ifp->if_index; 2048d8a7e3a7Sitojun } 2049d8a7e3a7Sitojun 2050d8a7e3a7Sitojun l += sizeof(*d); 2051d8a7e3a7Sitojun if (d) 2052d8a7e3a7Sitojun d++; 2053d8a7e3a7Sitojun } 2054d8a7e3a7Sitojun 2055d8a7e3a7Sitojun if (oldp) { 2056d8a7e3a7Sitojun *oldlenp = l; /* (caddr_t)d - (caddr_t)oldp */ 2057d8a7e3a7Sitojun if (l > ol) 2058d8a7e3a7Sitojun error = ENOMEM; 2059d8a7e3a7Sitojun } else 2060d8a7e3a7Sitojun *oldlenp = l; 2061d8a7e3a7Sitojun 2062d8a7e3a7Sitojun splx(s); 2063d8a7e3a7Sitojun 2064d8a7e3a7Sitojun return (error); 2065d8a7e3a7Sitojun } 2066d8a7e3a7Sitojun 2067d8a7e3a7Sitojun static int 2068d8a7e3a7Sitojun fill_prlist(oldp, oldlenp, ol) 2069d8a7e3a7Sitojun void *oldp; 2070d8a7e3a7Sitojun size_t *oldlenp, ol; 2071d8a7e3a7Sitojun { 2072d8a7e3a7Sitojun int error = 0, s; 2073d8a7e3a7Sitojun struct nd_prefix *pr; 2074d8a7e3a7Sitojun struct in6_prefix *p = NULL; 2075d8a7e3a7Sitojun struct in6_prefix *pe = NULL; 2076d8a7e3a7Sitojun size_t l; 2077d8a7e3a7Sitojun 20786e92dee6Sitojun s = splsoftnet(); 2079d8a7e3a7Sitojun 2080d8a7e3a7Sitojun if (oldp) { 2081d8a7e3a7Sitojun p = (struct in6_prefix *)oldp; 2082d8a7e3a7Sitojun pe = (struct in6_prefix *)((caddr_t)oldp + *oldlenp); 2083d8a7e3a7Sitojun } 2084d8a7e3a7Sitojun l = 0; 2085d8a7e3a7Sitojun 2086d8a7e3a7Sitojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) { 2087d8a7e3a7Sitojun u_short advrtrs; 2088d8a7e3a7Sitojun size_t advance; 2089d8a7e3a7Sitojun struct sockaddr_in6 *sin6; 2090d8a7e3a7Sitojun struct sockaddr_in6 *s6; 2091d8a7e3a7Sitojun struct nd_pfxrouter *pfr; 2092d8a7e3a7Sitojun 2093d8a7e3a7Sitojun if (oldp && p + 1 <= pe) 2094d8a7e3a7Sitojun { 2095d8a7e3a7Sitojun bzero(p, sizeof(*p)); 2096d8a7e3a7Sitojun sin6 = (struct sockaddr_in6 *)(p + 1); 2097d8a7e3a7Sitojun 2098d8a7e3a7Sitojun p->prefix = pr->ndpr_prefix; 2099d8a7e3a7Sitojun if (in6_recoverscope(&p->prefix, 2100d8a7e3a7Sitojun &p->prefix.sin6_addr, pr->ndpr_ifp) != 0) 2101d8a7e3a7Sitojun log(LOG_ERR, 2102d8a7e3a7Sitojun "scope error in prefix list (%s)\n", 2103d8a7e3a7Sitojun ip6_sprintf(&p->prefix.sin6_addr)); 2104d8a7e3a7Sitojun p->raflags = pr->ndpr_raf; 2105d8a7e3a7Sitojun p->prefixlen = pr->ndpr_plen; 2106d8a7e3a7Sitojun p->vltime = pr->ndpr_vltime; 2107d8a7e3a7Sitojun p->pltime = pr->ndpr_pltime; 2108d8a7e3a7Sitojun p->if_index = pr->ndpr_ifp->if_index; 2109d8a7e3a7Sitojun if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME) 2110d8a7e3a7Sitojun p->expire = 0; 2111d8a7e3a7Sitojun else { 2112d8a7e3a7Sitojun time_t maxexpire; 2113d8a7e3a7Sitojun 2114d8a7e3a7Sitojun /* XXX: we assume time_t is signed. */ 2115d8a7e3a7Sitojun maxexpire = (-1) & 2116d8a7e3a7Sitojun ~(1 << ((sizeof(maxexpire) * 8) - 1)); 2117d8a7e3a7Sitojun if (pr->ndpr_vltime < 2118d8a7e3a7Sitojun maxexpire - pr->ndpr_lastupdate) { 2119d8a7e3a7Sitojun p->expire = pr->ndpr_lastupdate + 2120d8a7e3a7Sitojun pr->ndpr_vltime; 2121d8a7e3a7Sitojun } else 2122d8a7e3a7Sitojun p->expire = maxexpire; 2123d8a7e3a7Sitojun } 2124d8a7e3a7Sitojun p->refcnt = pr->ndpr_refcnt; 2125d8a7e3a7Sitojun p->flags = pr->ndpr_stateflags; 2126d8a7e3a7Sitojun p->origin = PR_ORIG_RA; 2127d8a7e3a7Sitojun advrtrs = 0; 2128d8a7e3a7Sitojun for (pfr = pr->ndpr_advrtrs.lh_first; pfr; 2129d8a7e3a7Sitojun pfr = pfr->pfr_next) { 2130d8a7e3a7Sitojun if ((void *)&sin6[advrtrs + 1] > (void *)pe) { 2131d8a7e3a7Sitojun advrtrs++; 2132d8a7e3a7Sitojun continue; 2133d8a7e3a7Sitojun } 2134d8a7e3a7Sitojun s6 = &sin6[advrtrs]; 2135d8a7e3a7Sitojun s6->sin6_family = AF_INET6; 2136d8a7e3a7Sitojun s6->sin6_len = sizeof(struct sockaddr_in6); 2137d8a7e3a7Sitojun s6->sin6_addr = pfr->router->rtaddr; 2138d8a7e3a7Sitojun in6_recoverscope(s6, &pfr->router->rtaddr, 2139d8a7e3a7Sitojun pfr->router->ifp); 2140d8a7e3a7Sitojun advrtrs++; 2141d8a7e3a7Sitojun } 2142d8a7e3a7Sitojun p->advrtrs = advrtrs; 2143d8a7e3a7Sitojun } 2144d8a7e3a7Sitojun else { 2145d8a7e3a7Sitojun advrtrs = 0; 2146d8a7e3a7Sitojun for (pfr = pr->ndpr_advrtrs.lh_first; pfr; 2147d8a7e3a7Sitojun pfr = pfr->pfr_next) 2148d8a7e3a7Sitojun advrtrs++; 2149d8a7e3a7Sitojun } 2150d8a7e3a7Sitojun 2151d8a7e3a7Sitojun advance = sizeof(*p) + sizeof(*sin6) * advrtrs; 2152d8a7e3a7Sitojun l += advance; 2153d8a7e3a7Sitojun if (p) 2154d8a7e3a7Sitojun p = (struct in6_prefix *)((caddr_t)p + advance); 2155d8a7e3a7Sitojun } 2156d8a7e3a7Sitojun 2157d8a7e3a7Sitojun if (oldp) { 2158d8a7e3a7Sitojun *oldlenp = l; /* (caddr_t)d - (caddr_t)oldp */ 2159d8a7e3a7Sitojun if (l > ol) 2160d8a7e3a7Sitojun error = ENOMEM; 2161d8a7e3a7Sitojun } else 2162d8a7e3a7Sitojun *oldlenp = l; 2163d8a7e3a7Sitojun 2164d8a7e3a7Sitojun splx(s); 2165d8a7e3a7Sitojun 2166d8a7e3a7Sitojun return (error); 2167d8a7e3a7Sitojun } 2168