1*a0aa363cSjsing /* $OpenBSD: nd6.c,v 1.83 2010/02/08 11:56:09 jsing 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 static int nd6_inuse, nd6_allocated; 91287546eaSitojun 92287546eaSitojun struct llinfo_nd6 llinfo_nd6 = {&llinfo_nd6, &llinfo_nd6}; 93f4f4d166Sitojun struct nd_drhead nd_defrouter; 94287546eaSitojun struct nd_prhead nd_prefix = { 0 }; 95287546eaSitojun 96287546eaSitojun int nd6_recalc_reachtm_interval = ND6_RECALC_REACHTM_INTERVAL; 97287546eaSitojun static struct sockaddr_in6 all1_sa; 98287546eaSitojun 99*a0aa363cSjsing void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *); 100*a0aa363cSjsing void nd6_slowtimo(void *); 101*a0aa363cSjsing struct llinfo_nd6 *nd6_free(struct rtentry *, int); 102*a0aa363cSjsing void nd6_llinfo_timer(void *); 103287546eaSitojun 104b3c1e4c1Sitojun struct timeout nd6_slowtimo_ch; 105b3c1e4c1Sitojun struct timeout nd6_timer_ch; 106b3c1e4c1Sitojun extern struct timeout in6_tmpaddrtimer_ch; 107b3c1e4c1Sitojun 108*a0aa363cSjsing int fill_drlist(void *, size_t *, size_t); 109*a0aa363cSjsing int fill_prlist(void *, size_t *, size_t); 110d8a7e3a7Sitojun 111f3fcf2f3Smcbride #define LN_DEQUEUE(ln) do { \ 112f3fcf2f3Smcbride (ln)->ln_next->ln_prev = (ln)->ln_prev; \ 113f3fcf2f3Smcbride (ln)->ln_prev->ln_next = (ln)->ln_next; \ 114f3fcf2f3Smcbride } while (0) 115f3fcf2f3Smcbride #define LN_INSERTHEAD(ln) do { \ 116f3fcf2f3Smcbride (ln)->ln_next = llinfo_nd6.ln_next; \ 117f3fcf2f3Smcbride llinfo_nd6.ln_next = (ln); \ 118f3fcf2f3Smcbride (ln)->ln_prev = &llinfo_nd6; \ 119f3fcf2f3Smcbride (ln)->ln_next->ln_prev = (ln); \ 120f3fcf2f3Smcbride } while (0) 121f3fcf2f3Smcbride 122287546eaSitojun void 123*a0aa363cSjsing nd6_init(void) 124287546eaSitojun { 125287546eaSitojun static int nd6_init_done = 0; 126287546eaSitojun int i; 127287546eaSitojun 128287546eaSitojun if (nd6_init_done) { 129287546eaSitojun log(LOG_NOTICE, "nd6_init called more than once(ignored)\n"); 130287546eaSitojun return; 131287546eaSitojun } 132287546eaSitojun 133287546eaSitojun all1_sa.sin6_family = AF_INET6; 134287546eaSitojun all1_sa.sin6_len = sizeof(struct sockaddr_in6); 135287546eaSitojun for (i = 0; i < sizeof(all1_sa.sin6_addr); i++) 136287546eaSitojun all1_sa.sin6_addr.s6_addr[i] = 0xff; 137287546eaSitojun 138f4f4d166Sitojun /* initialization of the default router list */ 139f4f4d166Sitojun TAILQ_INIT(&nd_defrouter); 140f4f4d166Sitojun 141287546eaSitojun nd6_init_done = 1; 142287546eaSitojun 143287546eaSitojun /* start timer */ 144b3c1e4c1Sitojun timeout_set(&nd6_slowtimo_ch, nd6_slowtimo, NULL); 14529e86e5eSblambert timeout_add_sec(&nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL); 146287546eaSitojun } 147287546eaSitojun 148d6b9e9b9Sitojun struct nd_ifinfo * 149ee37ea65Smcbride nd6_ifattach(struct ifnet *ifp) 150287546eaSitojun { 151d6b9e9b9Sitojun struct nd_ifinfo *nd; 152287546eaSitojun 153393af863Skrw nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO); 154287546eaSitojun 155d6b9e9b9Sitojun nd->initialized = 1; 156287546eaSitojun 157d6b9e9b9Sitojun nd->chlim = IPV6_DEFHLIM; 158d6b9e9b9Sitojun nd->basereachable = REACHABLE_TIME; 159d6b9e9b9Sitojun nd->reachable = ND_COMPUTE_RTIME(nd->basereachable); 160d6b9e9b9Sitojun nd->retrans = RETRANS_TIMER; 161d8a7e3a7Sitojun /* 162d8a7e3a7Sitojun * Note that the default value of ip6_accept_rtadv is 0, which means 163d8a7e3a7Sitojun * we won't accept RAs by default even if we set ND6_IFF_ACCEPT_RTADV 164d8a7e3a7Sitojun * here. 165d8a7e3a7Sitojun */ 166d8a7e3a7Sitojun nd->flags = (ND6_IFF_PERFORMNUD | ND6_IFF_ACCEPT_RTADV); 1671b5f410aSitojun 1681b5f410aSitojun /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */ 1691b5f410aSitojun nd6_setmtu0(ifp, nd); 170d6b9e9b9Sitojun 171d6b9e9b9Sitojun return nd; 172287546eaSitojun } 173287546eaSitojun 174d6b9e9b9Sitojun void 175ee37ea65Smcbride nd6_ifdetach(struct nd_ifinfo *nd) 176d6b9e9b9Sitojun { 177d374aaacSitojun 178d6b9e9b9Sitojun free(nd, M_IP6NDP); 179287546eaSitojun } 180287546eaSitojun 181287546eaSitojun void 182ee37ea65Smcbride nd6_setmtu(struct ifnet *ifp) 1831b5f410aSitojun { 1841b5f410aSitojun nd6_setmtu0(ifp, ND_IFINFO(ifp)); 1851b5f410aSitojun } 1861b5f410aSitojun 1871b5f410aSitojun void 188ee37ea65Smcbride nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi) 189287546eaSitojun { 1901b5f410aSitojun u_int32_t omaxmtu; 1911b5f410aSitojun 1921b5f410aSitojun omaxmtu = ndi->maxmtu; 193287546eaSitojun 19440765843Shenning if (ifp->if_type == IFT_FDDI) 195d6b9e9b9Sitojun ndi->maxmtu = MIN(FDDIMTU, ifp->if_mtu); 19640765843Shenning else 197287546eaSitojun ndi->maxmtu = ifp->if_mtu; 198287546eaSitojun 1991b5f410aSitojun /* 2001b5f410aSitojun * Decreasing the interface MTU under IPV6 minimum MTU may cause 2011b5f410aSitojun * undesirable situation. We thus notify the operator of the change 2021b5f410aSitojun * explicitly. The check for omaxmtu is necessary to restrict the 2031b5f410aSitojun * log to the case of changing the MTU, not initializing it. 2041b5f410aSitojun */ 2051b5f410aSitojun if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) { 2061b5f410aSitojun log(LOG_NOTICE, "nd6_setmtu0: " 2071b5f410aSitojun "new link MTU on %s (%lu) is too small for IPv6\n", 2081b5f410aSitojun ifp->if_xname, (unsigned long)ndi->maxmtu); 209287546eaSitojun } 210d6b9e9b9Sitojun 211d6b9e9b9Sitojun if (ndi->maxmtu > in6_maxmtu) 212d6b9e9b9Sitojun in6_setmaxmtu(); /* check all interfaces just in case */ 213287546eaSitojun } 214287546eaSitojun 215287546eaSitojun void 216ee37ea65Smcbride nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts) 217287546eaSitojun { 218287546eaSitojun bzero(ndopts, sizeof(*ndopts)); 219287546eaSitojun ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 220287546eaSitojun ndopts->nd_opts_last 221287546eaSitojun = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 222287546eaSitojun 223287546eaSitojun if (icmp6len == 0) { 224287546eaSitojun ndopts->nd_opts_done = 1; 225287546eaSitojun ndopts->nd_opts_search = NULL; 226287546eaSitojun } 227287546eaSitojun } 228287546eaSitojun 229287546eaSitojun /* 230287546eaSitojun * Take one ND option. 231287546eaSitojun */ 232287546eaSitojun struct nd_opt_hdr * 233ee37ea65Smcbride nd6_option(union nd_opts *ndopts) 234287546eaSitojun { 235287546eaSitojun struct nd_opt_hdr *nd_opt; 236287546eaSitojun int olen; 237287546eaSitojun 238287546eaSitojun if (!ndopts) 239bc84bce2Skrw panic("ndopts == NULL in nd6_option"); 240287546eaSitojun if (!ndopts->nd_opts_last) 241bc84bce2Skrw panic("uninitialized ndopts in nd6_option"); 242287546eaSitojun if (!ndopts->nd_opts_search) 243287546eaSitojun return NULL; 244287546eaSitojun if (ndopts->nd_opts_done) 245287546eaSitojun return NULL; 246287546eaSitojun 247287546eaSitojun nd_opt = ndopts->nd_opts_search; 248287546eaSitojun 24915bd77d2Sitojun /* make sure nd_opt_len is inside the buffer */ 25015bd77d2Sitojun if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) { 25115bd77d2Sitojun bzero(ndopts, sizeof(*ndopts)); 25215bd77d2Sitojun return NULL; 25315bd77d2Sitojun } 25415bd77d2Sitojun 255287546eaSitojun olen = nd_opt->nd_opt_len << 3; 256287546eaSitojun if (olen == 0) { 257287546eaSitojun /* 258287546eaSitojun * Message validation requires that all included 259287546eaSitojun * options have a length that is greater than zero. 260287546eaSitojun */ 261287546eaSitojun bzero(ndopts, sizeof(*ndopts)); 262287546eaSitojun return NULL; 263287546eaSitojun } 264287546eaSitojun 265287546eaSitojun ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 26615bd77d2Sitojun if (ndopts->nd_opts_search > ndopts->nd_opts_last) { 26715bd77d2Sitojun /* option overruns the end of buffer, invalid */ 26815bd77d2Sitojun bzero(ndopts, sizeof(*ndopts)); 26915bd77d2Sitojun return NULL; 27015bd77d2Sitojun } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) { 27115bd77d2Sitojun /* reached the end of options chain */ 272287546eaSitojun ndopts->nd_opts_done = 1; 273287546eaSitojun ndopts->nd_opts_search = NULL; 274287546eaSitojun } 275287546eaSitojun return nd_opt; 276287546eaSitojun } 277287546eaSitojun 278287546eaSitojun /* 279287546eaSitojun * Parse multiple ND options. 280287546eaSitojun * This function is much easier to use, for ND routines that do not need 281287546eaSitojun * multiple options of the same type. 282287546eaSitojun */ 283287546eaSitojun int 284ee37ea65Smcbride nd6_options(union nd_opts *ndopts) 285287546eaSitojun { 286287546eaSitojun struct nd_opt_hdr *nd_opt; 287287546eaSitojun int i = 0; 288287546eaSitojun 289287546eaSitojun if (!ndopts) 290bc84bce2Skrw panic("ndopts == NULL in nd6_options"); 291287546eaSitojun if (!ndopts->nd_opts_last) 292bc84bce2Skrw panic("uninitialized ndopts in nd6_options"); 293287546eaSitojun if (!ndopts->nd_opts_search) 294287546eaSitojun return 0; 295287546eaSitojun 296287546eaSitojun while (1) { 297287546eaSitojun nd_opt = nd6_option(ndopts); 298287546eaSitojun if (!nd_opt && !ndopts->nd_opts_last) { 299287546eaSitojun /* 300287546eaSitojun * Message validation requires that all included 301287546eaSitojun * options have a length that is greater than zero. 302287546eaSitojun */ 303b79da24aSitojun icmp6stat.icp6s_nd_badopt++; 304287546eaSitojun bzero(ndopts, sizeof(*ndopts)); 305287546eaSitojun return -1; 306287546eaSitojun } 307287546eaSitojun 308287546eaSitojun if (!nd_opt) 309287546eaSitojun goto skip1; 310287546eaSitojun 311287546eaSitojun switch (nd_opt->nd_opt_type) { 312287546eaSitojun case ND_OPT_SOURCE_LINKADDR: 313287546eaSitojun case ND_OPT_TARGET_LINKADDR: 314287546eaSitojun case ND_OPT_MTU: 315287546eaSitojun case ND_OPT_REDIRECTED_HEADER: 316287546eaSitojun if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 31715bd77d2Sitojun nd6log((LOG_INFO, 31815bd77d2Sitojun "duplicated ND6 option found (type=%d)\n", 31915bd77d2Sitojun nd_opt->nd_opt_type)); 320287546eaSitojun /* XXX bark? */ 321287546eaSitojun } else { 322287546eaSitojun ndopts->nd_opt_array[nd_opt->nd_opt_type] 323287546eaSitojun = nd_opt; 324287546eaSitojun } 325287546eaSitojun break; 326287546eaSitojun case ND_OPT_PREFIX_INFORMATION: 327287546eaSitojun if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 328287546eaSitojun ndopts->nd_opt_array[nd_opt->nd_opt_type] 329287546eaSitojun = nd_opt; 330287546eaSitojun } 331287546eaSitojun ndopts->nd_opts_pi_end = 332287546eaSitojun (struct nd_opt_prefix_info *)nd_opt; 333287546eaSitojun break; 334287546eaSitojun default: 335287546eaSitojun /* 336287546eaSitojun * Unknown options must be silently ignored, 337e4d25771Stodd * to accommodate future extension to the protocol. 338287546eaSitojun */ 339b79da24aSitojun nd6log((LOG_DEBUG, 340287546eaSitojun "nd6_options: unsupported option %d - " 341b79da24aSitojun "option ignored\n", nd_opt->nd_opt_type)); 342287546eaSitojun } 343287546eaSitojun 344287546eaSitojun skip1: 345287546eaSitojun i++; 346287546eaSitojun if (i > nd6_maxndopt) { 347287546eaSitojun icmp6stat.icp6s_nd_toomanyopt++; 348b79da24aSitojun nd6log((LOG_INFO, "too many loop in nd opt\n")); 349287546eaSitojun break; 350287546eaSitojun } 351287546eaSitojun 352287546eaSitojun if (ndopts->nd_opts_done) 353287546eaSitojun break; 354287546eaSitojun } 355287546eaSitojun 356287546eaSitojun return 0; 357287546eaSitojun } 358287546eaSitojun 359287546eaSitojun /* 3609631a17bSitojun * ND6 timer routine to handle ND6 entries 361287546eaSitojun */ 362287546eaSitojun void 3639631a17bSitojun nd6_llinfo_settimer(struct llinfo_nd6 *ln, long tick) 3649631a17bSitojun { 3659631a17bSitojun int s; 3669631a17bSitojun 3679631a17bSitojun s = splsoftnet(); 3689631a17bSitojun 3699631a17bSitojun if (tick < 0) { 3709631a17bSitojun ln->ln_expire = 0; 3719631a17bSitojun ln->ln_ntick = 0; 3729631a17bSitojun timeout_del(&ln->ln_timer_ch); 3739631a17bSitojun } else { 3743212dc31Stholo ln->ln_expire = time_second + tick / hz; 3759631a17bSitojun if (tick > INT_MAX) { 3769631a17bSitojun ln->ln_ntick = tick - INT_MAX; 3779631a17bSitojun timeout_add(&ln->ln_timer_ch, INT_MAX); 3789631a17bSitojun } else { 3799631a17bSitojun ln->ln_ntick = 0; 3809631a17bSitojun timeout_add(&ln->ln_timer_ch, tick); 3819631a17bSitojun } 3829631a17bSitojun } 3839631a17bSitojun 3849631a17bSitojun splx(s); 3859631a17bSitojun } 3869631a17bSitojun 387*a0aa363cSjsing void 3889631a17bSitojun nd6_llinfo_timer(void *arg) 389287546eaSitojun { 390287546eaSitojun int s; 391b3c1e4c1Sitojun struct llinfo_nd6 *ln; 392287546eaSitojun struct rtentry *rt; 393287546eaSitojun struct sockaddr_in6 *dst; 3949631a17bSitojun struct ifnet *ifp; 395d374aaacSitojun struct nd_ifinfo *ndi = NULL; 396287546eaSitojun 3979631a17bSitojun s = splsoftnet(); 3989631a17bSitojun 3999631a17bSitojun ln = (struct llinfo_nd6 *)arg; 4009631a17bSitojun 4019631a17bSitojun if (ln->ln_ntick > 0) { 4029631a17bSitojun if (ln->ln_ntick > INT_MAX) { 4039631a17bSitojun ln->ln_ntick -= INT_MAX; 4049631a17bSitojun nd6_llinfo_settimer(ln, INT_MAX); 4059631a17bSitojun } else { 4069631a17bSitojun ln->ln_ntick = 0; 4079631a17bSitojun nd6_llinfo_settimer(ln, ln->ln_ntick); 408287546eaSitojun } 4099631a17bSitojun splx(s); 4109631a17bSitojun return; 411287546eaSitojun } 4129631a17bSitojun 4139631a17bSitojun if ((rt = ln->ln_rt) == NULL) 4149631a17bSitojun panic("ln->ln_rt == NULL"); 4159631a17bSitojun if ((ifp = rt->rt_ifp) == NULL) 4169631a17bSitojun panic("ln->ln_rt->rt_ifp == NULL"); 417d6b9e9b9Sitojun ndi = ND_IFINFO(ifp); 418287546eaSitojun dst = (struct sockaddr_in6 *)rt_key(rt); 419287546eaSitojun 420287546eaSitojun /* sanity check */ 421d374aaacSitojun if (rt->rt_llinfo && (struct llinfo_nd6 *)rt->rt_llinfo != ln) 422bc84bce2Skrw panic("rt_llinfo(%p) is not equal to ln(%p)", 423d374aaacSitojun rt->rt_llinfo, ln); 424287546eaSitojun if (!dst) 425bc84bce2Skrw panic("dst=0 in nd6_timer(ln=%p)", ln); 426287546eaSitojun 427287546eaSitojun switch (ln->ln_state) { 428287546eaSitojun case ND6_LLINFO_INCOMPLETE: 429287546eaSitojun if (ln->ln_asked < nd6_mmaxtries) { 430287546eaSitojun ln->ln_asked++; 4319631a17bSitojun nd6_llinfo_settimer(ln, (long)ndi->retrans * hz / 1000); 4329631a17bSitojun nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0); 433287546eaSitojun } else { 434287546eaSitojun struct mbuf *m = ln->ln_hold; 435287546eaSitojun if (m) { 4368294a4dfSitojun ln->ln_hold = NULL; 437287546eaSitojun /* 438d8a7e3a7Sitojun * Fake rcvif to make the ICMP error 439d8a7e3a7Sitojun * more helpful in diagnosing for the 440d8a7e3a7Sitojun * receiver. 441287546eaSitojun * XXX: should we consider 442287546eaSitojun * older rcvif? 443287546eaSitojun */ 444287546eaSitojun m->m_pkthdr.rcvif = rt->rt_ifp; 445d8a7e3a7Sitojun 446287546eaSitojun icmp6_error(m, ICMP6_DST_UNREACH, 447287546eaSitojun ICMP6_DST_UNREACH_ADDR, 0); 448e212adedSkrw if (ln->ln_hold == m) { 449e212adedSkrw /* m is back in ln_hold. Discard. */ 450e212adedSkrw m_freem(ln->ln_hold); 451e212adedSkrw ln->ln_hold = NULL; 452e212adedSkrw } 453287546eaSitojun } 4549631a17bSitojun (void)nd6_free(rt, 0); 4559631a17bSitojun ln = NULL; 456287546eaSitojun } 457287546eaSitojun break; 458287546eaSitojun case ND6_LLINFO_REACHABLE: 4599631a17bSitojun if (!ND6_LLINFO_PERMANENT(ln)) { 460287546eaSitojun ln->ln_state = ND6_LLINFO_STALE; 4619631a17bSitojun nd6_llinfo_settimer(ln, (long)nd6_gctimer * hz); 462be4e9e12Sitojun } 463287546eaSitojun break; 464be4e9e12Sitojun 465be4e9e12Sitojun case ND6_LLINFO_STALE: 466f3fcf2f3Smcbride case ND6_LLINFO_PURGE: 467be4e9e12Sitojun /* Garbage Collection(RFC 2461 5.3) */ 4689631a17bSitojun if (!ND6_LLINFO_PERMANENT(ln)) { 4699631a17bSitojun (void)nd6_free(rt, 1); 4709631a17bSitojun ln = NULL; 4719631a17bSitojun } 472be4e9e12Sitojun break; 473be4e9e12Sitojun 474287546eaSitojun case ND6_LLINFO_DELAY: 475d374aaacSitojun if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) { 476d374aaacSitojun /* We need NUD */ 477287546eaSitojun ln->ln_asked = 1; 478287546eaSitojun ln->ln_state = ND6_LLINFO_PROBE; 4799631a17bSitojun nd6_llinfo_settimer(ln, (long)ndi->retrans * hz / 1000); 480d374aaacSitojun nd6_ns_output(ifp, &dst->sin6_addr, 481d8a7e3a7Sitojun &dst->sin6_addr, ln, 0); 482be4e9e12Sitojun } else { 483d374aaacSitojun ln->ln_state = ND6_LLINFO_STALE; /* XXX */ 4849631a17bSitojun nd6_llinfo_settimer(ln, (long)nd6_gctimer * hz); 485be4e9e12Sitojun } 486287546eaSitojun break; 487287546eaSitojun case ND6_LLINFO_PROBE: 488287546eaSitojun if (ln->ln_asked < nd6_umaxtries) { 489287546eaSitojun ln->ln_asked++; 4909631a17bSitojun nd6_llinfo_settimer(ln, (long)ndi->retrans * hz / 1000); 491287546eaSitojun nd6_ns_output(ifp, &dst->sin6_addr, 492287546eaSitojun &dst->sin6_addr, ln, 0); 493d8a7e3a7Sitojun } else { 4949631a17bSitojun (void)nd6_free(rt, 0); 4959631a17bSitojun ln = NULL; 496d8a7e3a7Sitojun } 497287546eaSitojun break; 498287546eaSitojun } 4999631a17bSitojun 5009631a17bSitojun splx(s); 501287546eaSitojun } 502287546eaSitojun 5039631a17bSitojun /* 5049631a17bSitojun * ND6 timer routine to expire default route list and prefix list 5059631a17bSitojun */ 5069631a17bSitojun void 507ee37ea65Smcbride nd6_timer(void *ignored_arg) 5089631a17bSitojun { 5099631a17bSitojun int s; 5109631a17bSitojun struct nd_defrouter *dr; 5119631a17bSitojun struct nd_prefix *pr; 5129631a17bSitojun struct in6_ifaddr *ia6, *nia6; 5139631a17bSitojun 5149631a17bSitojun s = splsoftnet(); 5159631a17bSitojun timeout_set(&nd6_timer_ch, nd6_timer, NULL); 51629e86e5eSblambert timeout_add_sec(&nd6_timer_ch, nd6_prune); 5179631a17bSitojun 5180a2c5741Sitojun /* expire default router list */ 519f4f4d166Sitojun dr = TAILQ_FIRST(&nd_defrouter); 520287546eaSitojun while (dr) { 5213212dc31Stholo if (dr->expire && dr->expire < time_second) { 522287546eaSitojun struct nd_defrouter *t; 523f4f4d166Sitojun t = TAILQ_NEXT(dr, dr_entry); 524287546eaSitojun defrtrlist_del(dr); 525287546eaSitojun dr = t; 526d8a7e3a7Sitojun } else { 527f4f4d166Sitojun dr = TAILQ_NEXT(dr, dr_entry); 528287546eaSitojun } 529287546eaSitojun } 530287546eaSitojun 531287546eaSitojun /* 532d8a7e3a7Sitojun * expire interface addresses. 533d8a7e3a7Sitojun * in the past the loop was inside prefix expiry processing. 5348b542bbeSpascoe * However, from a stricter spec-conformance standpoint, we should 535d8a7e3a7Sitojun * rather separate address lifetimes and prefix lifetimes. 536d8a7e3a7Sitojun */ 537d8a7e3a7Sitojun for (ia6 = in6_ifaddr; ia6; ia6 = nia6) { 538d8a7e3a7Sitojun nia6 = ia6->ia_next; 539d8a7e3a7Sitojun /* check address lifetime */ 540d8a7e3a7Sitojun if (IFA6_IS_INVALID(ia6)) { 541d8a7e3a7Sitojun in6_purgeaddr(&ia6->ia_ifa); 5420a8b9475Smarkus } else if (IFA6_IS_DEPRECATED(ia6)) { 543d8a7e3a7Sitojun ia6->ia6_flags |= IN6_IFF_DEPRECATED; 544d8a7e3a7Sitojun } else { 545d8a7e3a7Sitojun /* 546d8a7e3a7Sitojun * A new RA might have made a deprecated address 547d8a7e3a7Sitojun * preferred. 548d8a7e3a7Sitojun */ 549d8a7e3a7Sitojun ia6->ia6_flags &= ~IN6_IFF_DEPRECATED; 550d8a7e3a7Sitojun } 551d8a7e3a7Sitojun } 552d8a7e3a7Sitojun 553d8a7e3a7Sitojun /* expire prefix list */ 554545205eaSpyr pr = LIST_FIRST(&nd_prefix); 555545205eaSpyr while (pr != NULL) { 556d8a7e3a7Sitojun /* 557287546eaSitojun * check prefix lifetime. 558287546eaSitojun * since pltime is just for autoconf, pltime processing for 559287546eaSitojun * prefix is not necessary. 560287546eaSitojun */ 561d8a7e3a7Sitojun if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME && 5623212dc31Stholo time_second - pr->ndpr_lastupdate > pr->ndpr_vltime) { 563287546eaSitojun struct nd_prefix *t; 564545205eaSpyr t = LIST_NEXT(pr, ndpr_entry); 565287546eaSitojun 566287546eaSitojun /* 567287546eaSitojun * address expiration and prefix expiration are 568d8a7e3a7Sitojun * separate. NEVER perform in6_purgeaddr here. 569287546eaSitojun */ 570287546eaSitojun 571287546eaSitojun prelist_remove(pr); 572287546eaSitojun pr = t; 573287546eaSitojun } else 574545205eaSpyr pr = LIST_NEXT(pr, ndpr_entry); 575287546eaSitojun } 576287546eaSitojun splx(s); 577287546eaSitojun } 578287546eaSitojun 57922770369Sitojun /* 58022770369Sitojun * Nuke neighbor cache/prefix/default router management table, right before 58122770369Sitojun * ifp goes away. 58222770369Sitojun */ 58322770369Sitojun void 584ee37ea65Smcbride nd6_purge(struct ifnet *ifp) 58522770369Sitojun { 58622770369Sitojun struct llinfo_nd6 *ln, *nln; 587d8a7e3a7Sitojun struct nd_defrouter *dr, *ndr; 58822770369Sitojun struct nd_prefix *pr, *npr; 58922770369Sitojun 59022770369Sitojun /* 591d8a7e3a7Sitojun * Nuke default router list entries toward ifp. 592d8a7e3a7Sitojun * We defer removal of default router list entries that is installed 593d8a7e3a7Sitojun * in the routing table, in order to keep additional side effects as 594d8a7e3a7Sitojun * small as possible. 59522770369Sitojun */ 596d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = ndr) { 597f4f4d166Sitojun ndr = TAILQ_NEXT(dr, dr_entry); 598d8a7e3a7Sitojun if (dr->installed) 599d8a7e3a7Sitojun continue; 600d8a7e3a7Sitojun 60122770369Sitojun if (dr->ifp == ifp) 60222770369Sitojun defrtrlist_del(dr); 60322770369Sitojun } 604d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = ndr) { 605d8a7e3a7Sitojun ndr = TAILQ_NEXT(dr, dr_entry); 606d8a7e3a7Sitojun if (!dr->installed) 607d8a7e3a7Sitojun continue; 608d8a7e3a7Sitojun 60922770369Sitojun if (dr->ifp == ifp) 61022770369Sitojun defrtrlist_del(dr); 61122770369Sitojun } 61222770369Sitojun 61322770369Sitojun /* Nuke prefix list entries toward ifp */ 614545205eaSpyr for (pr = LIST_FIRST(&nd_prefix); pr != NULL; pr = npr) { 615545205eaSpyr npr = LIST_NEXT(pr, ndpr_entry); 61622770369Sitojun if (pr->ndpr_ifp == ifp) { 617d8a7e3a7Sitojun /* 61808abfc37Sbrad * Because if_detach() does *not* release prefixes 61908abfc37Sbrad * while purging addresses the reference count will 62008abfc37Sbrad * still be above zero. We therefore reset it to 62108abfc37Sbrad * make sure that the prefix really gets purged. 62208abfc37Sbrad */ 62308abfc37Sbrad pr->ndpr_refcnt = 0; 62408abfc37Sbrad /* 625d8a7e3a7Sitojun * Previously, pr->ndpr_addr is removed as well, 626d8a7e3a7Sitojun * but I strongly believe we don't have to do it. 627d8a7e3a7Sitojun * nd6_purge() is only called from in6_ifdetach(), 628d8a7e3a7Sitojun * which removes all the associated interface addresses 629d8a7e3a7Sitojun * by itself. 630d8a7e3a7Sitojun * (jinmei@kame.net 20010129) 631d8a7e3a7Sitojun */ 63222770369Sitojun prelist_remove(pr); 63322770369Sitojun } 63422770369Sitojun } 63522770369Sitojun 636f4f4d166Sitojun /* cancel default outgoing interface setting */ 637f4f4d166Sitojun if (nd6_defifindex == ifp->if_index) 638f4f4d166Sitojun nd6_setdefaultiface(0); 639f4f4d166Sitojun 640e6e438a4Sitojun if (!ip6_forwarding && ip6_accept_rtadv) { /* XXX: too restrictive? */ 64122770369Sitojun /* refresh default router list */ 642f4f4d166Sitojun defrouter_select(); 643e6e438a4Sitojun } 64422770369Sitojun 64522770369Sitojun /* 64622770369Sitojun * Nuke neighbor cache entries for the ifp. 64722770369Sitojun * Note that rt->rt_ifp may not be the same as ifp, 64822770369Sitojun * due to KAME goto ours hack. See RTM_RESOLVE case in 64922770369Sitojun * nd6_rtrequest(), and ip6_input(). 65022770369Sitojun */ 65122770369Sitojun ln = llinfo_nd6.ln_next; 65222770369Sitojun while (ln && ln != &llinfo_nd6) { 65322770369Sitojun struct rtentry *rt; 65422770369Sitojun struct sockaddr_dl *sdl; 65522770369Sitojun 65622770369Sitojun nln = ln->ln_next; 65722770369Sitojun rt = ln->ln_rt; 65822770369Sitojun if (rt && rt->rt_gateway && 65922770369Sitojun rt->rt_gateway->sa_family == AF_LINK) { 66022770369Sitojun sdl = (struct sockaddr_dl *)rt->rt_gateway; 66122770369Sitojun if (sdl->sdl_index == ifp->if_index) 662d8a7e3a7Sitojun nln = nd6_free(rt, 0); 66322770369Sitojun } 66422770369Sitojun ln = nln; 66522770369Sitojun } 66622770369Sitojun } 66722770369Sitojun 668287546eaSitojun struct rtentry * 669ee37ea65Smcbride nd6_lookup(struct in6_addr *addr6, int create, struct ifnet *ifp) 670287546eaSitojun { 671287546eaSitojun struct rtentry *rt; 672287546eaSitojun struct sockaddr_in6 sin6; 673287546eaSitojun 674287546eaSitojun bzero(&sin6, sizeof(sin6)); 675287546eaSitojun sin6.sin6_len = sizeof(struct sockaddr_in6); 676287546eaSitojun sin6.sin6_family = AF_INET6; 677287546eaSitojun sin6.sin6_addr = *addr6; 678d8a7e3a7Sitojun 679c241aca8Shenning rt = rtalloc1((struct sockaddr *)&sin6, create, 0); 680287546eaSitojun if (rt && (rt->rt_flags & RTF_LLINFO) == 0) { 681287546eaSitojun /* 682287546eaSitojun * This is the case for the default route. 683287546eaSitojun * If we want to create a neighbor cache for the address, we 684287546eaSitojun * should free the route for the destination and allocate an 685287546eaSitojun * interface route. 686287546eaSitojun */ 687287546eaSitojun if (create) { 688287546eaSitojun RTFREE(rt); 689287546eaSitojun rt = 0; 690287546eaSitojun } 691287546eaSitojun } 692287546eaSitojun if (!rt) { 693287546eaSitojun if (create && ifp) { 694cb24f5e5Sclaudio struct rt_addrinfo info; 695d374aaacSitojun int e; 696d374aaacSitojun 697287546eaSitojun /* 698287546eaSitojun * If no route is available and create is set, 699287546eaSitojun * we allocate a host route for the destination 700287546eaSitojun * and treat it like an interface route. 701287546eaSitojun * This hack is necessary for a neighbor which can't 702287546eaSitojun * be covered by our own prefix. 703287546eaSitojun */ 704287546eaSitojun struct ifaddr *ifa = 705287546eaSitojun ifaof_ifpforaddr((struct sockaddr *)&sin6, ifp); 706287546eaSitojun if (ifa == NULL) 707287546eaSitojun return (NULL); 708287546eaSitojun 709287546eaSitojun /* 710287546eaSitojun * Create a new route. RTF_LLINFO is necessary 711287546eaSitojun * to create a Neighbor Cache entry for the 712287546eaSitojun * destination in nd6_rtrequest which will be 713cb24f5e5Sclaudio * called in rtrequest1 via ifa->ifa_rtrequest. 714287546eaSitojun */ 715cb24f5e5Sclaudio bzero(&info, sizeof(info)); 716cb24f5e5Sclaudio info.rti_flags = (ifa->ifa_flags | RTF_HOST | 717cb24f5e5Sclaudio RTF_LLINFO) & ~RTF_CLONING; 718cb24f5e5Sclaudio info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6; 719cb24f5e5Sclaudio info.rti_info[RTAX_GATEWAY] = ifa->ifa_addr; 720cb24f5e5Sclaudio info.rti_info[RTAX_NETMASK] = 721cb24f5e5Sclaudio (struct sockaddr *)&all1_sa; 722cb24f5e5Sclaudio if ((e = rtrequest1(RTM_ADD, &info, RTP_CONNECTED, 723cb24f5e5Sclaudio &rt, 0)) != 0) { 724d8a7e3a7Sitojun #if 0 725287546eaSitojun log(LOG_ERR, 726287546eaSitojun "nd6_lookup: failed to add route for a " 727d374aaacSitojun "neighbor(%s), errno=%d\n", 728d374aaacSitojun ip6_sprintf(addr6), e); 729d8a7e3a7Sitojun #endif 730d8a7e3a7Sitojun return (NULL); 731d8a7e3a7Sitojun } 732287546eaSitojun if (rt == NULL) 733287546eaSitojun return (NULL); 734287546eaSitojun if (rt->rt_llinfo) { 735287546eaSitojun struct llinfo_nd6 *ln = 736287546eaSitojun (struct llinfo_nd6 *)rt->rt_llinfo; 737287546eaSitojun ln->ln_state = ND6_LLINFO_NOSTATE; 738287546eaSitojun } 739f6e55599Sitojun } else 740287546eaSitojun return (NULL); 741287546eaSitojun } 742287546eaSitojun rt->rt_refcnt--; 743287546eaSitojun /* 744287546eaSitojun * Validation for the entry. 745d8a7e3a7Sitojun * Note that the check for rt_llinfo is necessary because a cloned 746d8a7e3a7Sitojun * route from a parent route that has the L flag (e.g. the default 747d8a7e3a7Sitojun * route to a p2p interface) may have the flag, too, while the 748d8a7e3a7Sitojun * destination is not actually a neighbor. 749287546eaSitojun * XXX: we can't use rt->rt_ifp to check for the interface, since 750287546eaSitojun * it might be the loopback interface if the entry is for our 751287546eaSitojun * own address on a non-loopback interface. Instead, we should 752d8a7e3a7Sitojun * use rt->rt_ifa->ifa_ifp, which would specify the REAL 753d8a7e3a7Sitojun * interface. 754287546eaSitojun */ 755287546eaSitojun if ((rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 || 756d8a7e3a7Sitojun rt->rt_gateway->sa_family != AF_LINK || rt->rt_llinfo == NULL || 757287546eaSitojun (ifp && rt->rt_ifa->ifa_ifp != ifp)) { 758287546eaSitojun if (create) { 759da592434Sitojun nd6log((LOG_DEBUG, 760d8a7e3a7Sitojun "nd6_lookup: failed to lookup %s (if = %s)\n", 761da592434Sitojun ip6_sprintf(addr6), 762da592434Sitojun ifp ? ifp->if_xname : "unspec")); 763287546eaSitojun } 764d8a7e3a7Sitojun return (NULL); 765287546eaSitojun } 766287546eaSitojun return (rt); 767287546eaSitojun } 768287546eaSitojun 769287546eaSitojun /* 770287546eaSitojun * Detect if a given IPv6 address identifies a neighbor on a given link. 771287546eaSitojun * XXX: should take care of the destination of a p2p link? 772287546eaSitojun */ 773287546eaSitojun int 774ee37ea65Smcbride nd6_is_addr_neighbor(struct sockaddr_in6 *addr, struct ifnet *ifp) 775287546eaSitojun { 776d8a7e3a7Sitojun struct nd_prefix *pr; 777d8a7e3a7Sitojun struct rtentry *rt; 778287546eaSitojun 779cfb6b8dfSitojun /* 780cfb6b8dfSitojun * A link-local address is always a neighbor. 781cfb6b8dfSitojun * XXX: we should use the sin6_scope_id field rather than the embedded 782cfb6b8dfSitojun * interface index. 783d8a7e3a7Sitojun * XXX: a link does not necessarily specify a single interface. 784cfb6b8dfSitojun */ 785cfb6b8dfSitojun if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr) && 786cfb6b8dfSitojun ntohs(*(u_int16_t *)&addr->sin6_addr.s6_addr[2]) == ifp->if_index) 787287546eaSitojun return (1); 788287546eaSitojun 789287546eaSitojun /* 790d8a7e3a7Sitojun * If the address matches one of our on-link prefixes, it should be a 791d8a7e3a7Sitojun * neighbor. 792287546eaSitojun */ 793545205eaSpyr LIST_FOREACH(pr, &nd_prefix, ndpr_entry) { 794d8a7e3a7Sitojun if (pr->ndpr_ifp != ifp) 795d8a7e3a7Sitojun continue; 796287546eaSitojun 797d8a7e3a7Sitojun if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) 798d8a7e3a7Sitojun continue; 799d8a7e3a7Sitojun 800d8a7e3a7Sitojun if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 801d8a7e3a7Sitojun &addr->sin6_addr, &pr->ndpr_mask)) 802d8a7e3a7Sitojun return (1); 803287546eaSitojun } 804d8a7e3a7Sitojun 805d8a7e3a7Sitojun /* 806d8a7e3a7Sitojun * If the default router list is empty, all addresses are regarded 807d8a7e3a7Sitojun * as on-link, and thus, as a neighbor. 808d8a7e3a7Sitojun * XXX: we restrict the condition to hosts, because routers usually do 809d8a7e3a7Sitojun * not have the "default router list". 810d8a7e3a7Sitojun */ 811d8a7e3a7Sitojun if (!ip6_forwarding && TAILQ_FIRST(&nd_defrouter) == NULL && 812d8a7e3a7Sitojun nd6_defifindex == ifp->if_index) { 813287546eaSitojun return (1); 814287546eaSitojun } 815287546eaSitojun 816287546eaSitojun /* 817287546eaSitojun * Even if the address matches none of our addresses, it might be 818287546eaSitojun * in the neighbor cache. 819287546eaSitojun */ 820d8a7e3a7Sitojun if ((rt = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) 821287546eaSitojun return (1); 822287546eaSitojun 823287546eaSitojun return (0); 824287546eaSitojun } 825287546eaSitojun 826287546eaSitojun /* 827287546eaSitojun * Free an nd6 llinfo entry. 828d8a7e3a7Sitojun * Since the function would cause significant changes in the kernel, DO NOT 829d8a7e3a7Sitojun * make it global, unless you have a strong reason for the change, and are sure 830d8a7e3a7Sitojun * that the change is safe. 831287546eaSitojun */ 832*a0aa363cSjsing struct llinfo_nd6 * 833ee37ea65Smcbride nd6_free(struct rtentry *rt, int gc) 834287546eaSitojun { 835cb24f5e5Sclaudio struct rt_addrinfo info; 83629760ae1Sitojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo, *next; 837f4f4d166Sitojun struct in6_addr in6 = ((struct sockaddr_in6 *)rt_key(rt))->sin6_addr; 838287546eaSitojun struct nd_defrouter *dr; 839287546eaSitojun 840287546eaSitojun /* 841d8a7e3a7Sitojun * we used to have pfctlinput(PRC_HOSTDEAD) here. 842d8a7e3a7Sitojun * even though it is not harmful, it was not really necessary. 843287546eaSitojun */ 844f4f4d166Sitojun 845492c93a5Sitojun if (!ip6_forwarding) { 846f4f4d166Sitojun int s; 8476e92dee6Sitojun s = splsoftnet(); 848f4f4d166Sitojun dr = defrouter_lookup(&((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 849f4f4d166Sitojun rt->rt_ifp); 850d8a7e3a7Sitojun 851d8a7e3a7Sitojun if (dr != NULL && dr->expire && 852d8a7e3a7Sitojun ln->ln_state == ND6_LLINFO_STALE && gc) { 853d8a7e3a7Sitojun /* 854d8a7e3a7Sitojun * If the reason for the deletion is just garbage 855d8a7e3a7Sitojun * collection, and the neighbor is an active default 856d8a7e3a7Sitojun * router, do not delete it. Instead, reset the GC 857d8a7e3a7Sitojun * timer using the router's lifetime. 858d8a7e3a7Sitojun * Simply deleting the entry would affect default 859d8a7e3a7Sitojun * router selection, which is not necessarily a good 860d8a7e3a7Sitojun * thing, especially when we're using router preference 861d8a7e3a7Sitojun * values. 862d8a7e3a7Sitojun * XXX: the check for ln_state would be redundant, 863d8a7e3a7Sitojun * but we intentionally keep it just in case. 864d8a7e3a7Sitojun */ 8653212dc31Stholo if (dr->expire > time_second * hz) { 8669631a17bSitojun nd6_llinfo_settimer(ln, 8673212dc31Stholo dr->expire - time_second * hz); 8689631a17bSitojun } else 8699631a17bSitojun nd6_llinfo_settimer(ln, (long)nd6_gctimer * hz); 870d8a7e3a7Sitojun splx(s); 871d8a7e3a7Sitojun return (ln->ln_next); 872d8a7e3a7Sitojun } 873d8a7e3a7Sitojun 874f4f4d166Sitojun if (ln->ln_router || dr) { 875f4f4d166Sitojun /* 876f4f4d166Sitojun * rt6_flush must be called whether or not the neighbor 877f4f4d166Sitojun * is in the Default Router List. 878f4f4d166Sitojun * See a corresponding comment in nd6_na_input(). 879f4f4d166Sitojun */ 880f4f4d166Sitojun rt6_flush(&in6, rt->rt_ifp); 881f4f4d166Sitojun } 882f4f4d166Sitojun 883f4f4d166Sitojun if (dr) { 884f4f4d166Sitojun /* 8858b542bbeSpascoe * Unreachability of a router might affect the default 886f4f4d166Sitojun * router selection and on-link detection of advertised 887f4f4d166Sitojun * prefixes. 888f4f4d166Sitojun */ 889f4f4d166Sitojun 890f4f4d166Sitojun /* 891f4f4d166Sitojun * Temporarily fake the state to choose a new default 892f4f4d166Sitojun * router and to perform on-link determination of 89334deef1eSitojun * prefixes correctly. 894f4f4d166Sitojun * Below the state will be set correctly, 895f4f4d166Sitojun * or the entry itself will be deleted. 896f4f4d166Sitojun */ 897f4f4d166Sitojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 898f4f4d166Sitojun 899f4f4d166Sitojun /* 900d8a7e3a7Sitojun * Since defrouter_select() does not affect the 901d8a7e3a7Sitojun * on-link determination and MIP6 needs the check 902d8a7e3a7Sitojun * before the default router selection, we perform 903d8a7e3a7Sitojun * the check now. 904f4f4d166Sitojun */ 905f4f4d166Sitojun pfxlist_onlink_check(); 906d8a7e3a7Sitojun 907d8a7e3a7Sitojun /* 908d8a7e3a7Sitojun * refresh default router list 909d8a7e3a7Sitojun */ 910d8a7e3a7Sitojun defrouter_select(); 911287546eaSitojun } 912287546eaSitojun splx(s); 913287546eaSitojun } 914287546eaSitojun 91529760ae1Sitojun /* 91629760ae1Sitojun * Before deleting the entry, remember the next entry as the 91729760ae1Sitojun * return value. We need this because pfxlist_onlink_check() above 91829760ae1Sitojun * might have freed other entries (particularly the old next entry) as 91929760ae1Sitojun * a side effect (XXX). 92029760ae1Sitojun */ 92129760ae1Sitojun next = ln->ln_next; 92229760ae1Sitojun 92329760ae1Sitojun /* 92429760ae1Sitojun * Detach the route from the routing tree and the list of neighbor 92529760ae1Sitojun * caches, and disable the route entry not to be used in already 92629760ae1Sitojun * cached routes. 92729760ae1Sitojun */ 928cb24f5e5Sclaudio bzero(&info, sizeof(info)); 929cb24f5e5Sclaudio info.rti_info[RTAX_DST] = rt_key(rt); 930cb24f5e5Sclaudio info.rti_info[RTAX_NETMASK] = rt_mask(rt); 931cb24f5e5Sclaudio rtrequest1(RTM_DELETE, &info, rt->rt_priority, NULL, 0); 93229760ae1Sitojun 9330a2c5741Sitojun return (next); 934287546eaSitojun } 935287546eaSitojun 936287546eaSitojun /* 937287546eaSitojun * Upper-layer reachability hint for Neighbor Unreachability Detection. 938287546eaSitojun * 9398b542bbeSpascoe * XXX cost-effective methods? 940287546eaSitojun */ 941287546eaSitojun void 942ee37ea65Smcbride nd6_nud_hint(struct rtentry *rt, struct in6_addr *dst6, int force) 943287546eaSitojun { 944287546eaSitojun struct llinfo_nd6 *ln; 945287546eaSitojun 946287546eaSitojun /* 947287546eaSitojun * If the caller specified "rt", use that. Otherwise, resolve the 948287546eaSitojun * routing table by supplied "dst6". 949287546eaSitojun */ 950287546eaSitojun if (!rt) { 951287546eaSitojun if (!dst6) 952287546eaSitojun return; 953287546eaSitojun if (!(rt = nd6_lookup(dst6, 0, NULL))) 954287546eaSitojun return; 955287546eaSitojun } 956287546eaSitojun 957f6e55599Sitojun if ((rt->rt_flags & RTF_GATEWAY) != 0 || 958f6e55599Sitojun (rt->rt_flags & RTF_LLINFO) == 0 || 959f6e55599Sitojun !rt->rt_llinfo || !rt->rt_gateway || 960f6e55599Sitojun rt->rt_gateway->sa_family != AF_LINK) { 961287546eaSitojun /* This is not a host route. */ 962287546eaSitojun return; 963287546eaSitojun } 964287546eaSitojun 965287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 966804d8827Sitojun if (ln->ln_state < ND6_LLINFO_REACHABLE) 967287546eaSitojun return; 968287546eaSitojun 969f6e55599Sitojun /* 970f6e55599Sitojun * if we get upper-layer reachability confirmation many times, 971f6e55599Sitojun * it is possible we have false information. 972f6e55599Sitojun */ 973f6e55599Sitojun if (!force) { 974f6e55599Sitojun ln->ln_byhint++; 975f6e55599Sitojun if (ln->ln_byhint > nd6_maxnudhint) 976f6e55599Sitojun return; 977f6e55599Sitojun } 978f6e55599Sitojun 979287546eaSitojun ln->ln_state = ND6_LLINFO_REACHABLE; 9809631a17bSitojun if (!ND6_LLINFO_PERMANENT(ln)) { 9819631a17bSitojun nd6_llinfo_settimer(ln, 9829631a17bSitojun (long)ND_IFINFO(rt->rt_ifp)->reachable * hz); 9839631a17bSitojun } 984287546eaSitojun } 985287546eaSitojun 986ee37ea65Smcbride /* 987ee37ea65Smcbride * info - XXX: unused 988ee37ea65Smcbride */ 989ee37ea65Smcbride 990287546eaSitojun void 991ee37ea65Smcbride nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info) 992287546eaSitojun { 993287546eaSitojun struct sockaddr *gate = rt->rt_gateway; 994287546eaSitojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)rt->rt_llinfo; 995287546eaSitojun static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 996287546eaSitojun struct ifnet *ifp = rt->rt_ifp; 997287546eaSitojun struct ifaddr *ifa; 99870fc31beSrainer struct nd_defrouter *dr; 99970fc31beSrainer 100070fc31beSrainer if (req == RTM_DELETE && (rt->rt_flags & RTF_GATEWAY) && 100170fc31beSrainer (IN6_ARE_ADDR_EQUAL(&(satosin6(rt_key(rt)))->sin6_addr, 100270fc31beSrainer &in6addr_any) && rt_mask(rt) && (rt_mask(rt)->sa_len == 0 || 100370fc31beSrainer IN6_ARE_ADDR_EQUAL(&(satosin6(rt_mask(rt)))->sin6_addr, 100470fc31beSrainer &in6addr_any)))) { 100570fc31beSrainer dr = defrouter_lookup(&SIN6(gate)->sin6_addr, ifp); 100670fc31beSrainer if (dr) 100770fc31beSrainer dr->installed = 0; 100870fc31beSrainer } 1009287546eaSitojun 1010d8a7e3a7Sitojun if ((rt->rt_flags & RTF_GATEWAY) != 0) 1011287546eaSitojun return; 1012287546eaSitojun 1013d8a7e3a7Sitojun if (nd6_need_cache(ifp) == 0 && (rt->rt_flags & RTF_HOST) == 0) { 1014d8a7e3a7Sitojun /* 1015d8a7e3a7Sitojun * This is probably an interface direct route for a link 1016d8a7e3a7Sitojun * which does not need neighbor caches (e.g. fe80::%lo0/64). 1017d8a7e3a7Sitojun * We do not need special treatment below for such a route. 1018d8a7e3a7Sitojun * Moreover, the RTF_LLINFO flag which would be set below 1019d8a7e3a7Sitojun * would annoy the ndp(8) command. 1020d8a7e3a7Sitojun */ 1021d8a7e3a7Sitojun return; 1022d8a7e3a7Sitojun } 1023d8a7e3a7Sitojun 1024d8a7e3a7Sitojun if (req == RTM_RESOLVE && 1025d8a7e3a7Sitojun (nd6_need_cache(ifp) == 0 || /* stf case */ 1026d8a7e3a7Sitojun !nd6_is_addr_neighbor((struct sockaddr_in6 *)rt_key(rt), ifp))) { 1027d8a7e3a7Sitojun /* 1028d8a7e3a7Sitojun * FreeBSD and BSD/OS often make a cloned host route based 1029d8a7e3a7Sitojun * on a less-specific route (e.g. the default route). 1030d8a7e3a7Sitojun * If the less specific route does not have a "gateway" 1031d8a7e3a7Sitojun * (this is the case when the route just goes to a p2p or an 1032d8a7e3a7Sitojun * stf interface), we'll mistakenly make a neighbor cache for 1033d8a7e3a7Sitojun * the host route, and will see strange neighbor solicitation 1034d8a7e3a7Sitojun * for the corresponding destination. In order to avoid the 1035d8a7e3a7Sitojun * confusion, we check if the destination of the route is 1036d8a7e3a7Sitojun * a neighbor in terms of neighbor discovery, and stop the 1037d8a7e3a7Sitojun * process if not. Additionally, we remove the LLINFO flag 1038d8a7e3a7Sitojun * so that ndp(8) will not try to get the neighbor information 1039d8a7e3a7Sitojun * of the destination. 1040d8a7e3a7Sitojun */ 1041d8a7e3a7Sitojun rt->rt_flags &= ~RTF_LLINFO; 1042d8a7e3a7Sitojun return; 1043d8a7e3a7Sitojun } 1044d8a7e3a7Sitojun 1045287546eaSitojun switch (req) { 1046287546eaSitojun case RTM_ADD: 1047287546eaSitojun /* 1048287546eaSitojun * There is no backward compatibility :) 1049287546eaSitojun * 1050287546eaSitojun * if ((rt->rt_flags & RTF_HOST) == 0 && 1051287546eaSitojun * SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff) 1052287546eaSitojun * rt->rt_flags |= RTF_CLONING; 1053287546eaSitojun */ 105448ebf8e1Sitojun if ((rt->rt_flags & RTF_CLONING) || 105548ebf8e1Sitojun ((rt->rt_flags & RTF_LLINFO) && !ln)) { 1056287546eaSitojun /* 105748ebf8e1Sitojun * Case 1: This route should come from a route to 105848ebf8e1Sitojun * interface (RTF_CLONING case) or the route should be 105948ebf8e1Sitojun * treated as on-link but is currently not 106048ebf8e1Sitojun * (RTF_LLINFO && !ln case). 1061287546eaSitojun */ 1062287546eaSitojun rt_setgate(rt, rt_key(rt), 1063c241aca8Shenning (struct sockaddr *)&null_sdl, 0); 1064287546eaSitojun gate = rt->rt_gateway; 1065287546eaSitojun SDL(gate)->sdl_type = ifp->if_type; 1066287546eaSitojun SDL(gate)->sdl_index = ifp->if_index; 1067287546eaSitojun if (ln) 10689631a17bSitojun nd6_llinfo_settimer(ln, 0); 1069d8a7e3a7Sitojun if ((rt->rt_flags & RTF_CLONING) != 0) 1070287546eaSitojun break; 1071287546eaSitojun } 1072f4f4d166Sitojun /* 10738b542bbeSpascoe * In IPv4 code, we try to announce new RTF_ANNOUNCE entry here. 1074f4f4d166Sitojun * We don't do that here since llinfo is not ready yet. 1075f4f4d166Sitojun * 1076f4f4d166Sitojun * There are also couple of other things to be discussed: 1077f4f4d166Sitojun * - unsolicited NA code needs improvement beforehand 1078f4f4d166Sitojun * - RFC2461 says we MAY send multicast unsolicited NA 1079f4f4d166Sitojun * (7.2.6 paragraph 4), however, it also says that we 1080f4f4d166Sitojun * SHOULD provide a mechanism to prevent multicast NA storm. 1081f4f4d166Sitojun * we don't have anything like it right now. 1082841d7adbSitojun * note that the mechanism needs a mutual agreement 1083f4f4d166Sitojun * between proxies, which means that we need to implement 1084841d7adbSitojun * a new protocol, or a new kludge. 1085841d7adbSitojun * - from RFC2461 6.2.4, host MUST NOT send an unsolicited NA. 1086f4f4d166Sitojun * we need to check ip6forwarding before sending it. 1087f4f4d166Sitojun * (or should we allow proxy ND configuration only for 1088f4f4d166Sitojun * routers? there's no mention about proxy ND from hosts) 1089f4f4d166Sitojun */ 1090f4f4d166Sitojun #if 0 1091f4f4d166Sitojun /* XXX it does not work */ 1092287546eaSitojun if (rt->rt_flags & RTF_ANNOUNCE) 1093287546eaSitojun nd6_na_output(ifp, 1094287546eaSitojun &SIN6(rt_key(rt))->sin6_addr, 1095287546eaSitojun &SIN6(rt_key(rt))->sin6_addr, 1096287546eaSitojun ip6_forwarding ? ND_NA_FLAG_ROUTER : 0, 1097f4f4d166Sitojun 1, NULL); 1098f4f4d166Sitojun #endif 1099287546eaSitojun /* FALLTHROUGH */ 1100287546eaSitojun case RTM_RESOLVE: 1101d8a7e3a7Sitojun if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) { 1102d374aaacSitojun /* 1103d374aaacSitojun * Address resolution isn't necessary for a point to 1104d374aaacSitojun * point link, so we can skip this test for a p2p link. 1105d374aaacSitojun */ 1106287546eaSitojun if (gate->sa_family != AF_LINK || 1107287546eaSitojun gate->sa_len < sizeof(null_sdl)) { 1108d374aaacSitojun log(LOG_DEBUG, 11090a2c5741Sitojun "nd6_rtrequest: bad gateway value: %s\n", 111093036e4eSangelos ifp->if_xname); 1111287546eaSitojun break; 1112287546eaSitojun } 1113287546eaSitojun SDL(gate)->sdl_type = ifp->if_type; 1114287546eaSitojun SDL(gate)->sdl_index = ifp->if_index; 1115d374aaacSitojun } 1116d374aaacSitojun if (ln != NULL) 1117287546eaSitojun break; /* This happens on a route change */ 1118287546eaSitojun /* 1119287546eaSitojun * Case 2: This route may come from cloning, or a manual route 1120287546eaSitojun * add with a LL address. 1121287546eaSitojun */ 1122287546eaSitojun R_Malloc(ln, struct llinfo_nd6 *, sizeof(*ln)); 1123287546eaSitojun rt->rt_llinfo = (caddr_t)ln; 1124287546eaSitojun if (!ln) { 1125287546eaSitojun log(LOG_DEBUG, "nd6_rtrequest: malloc failed\n"); 1126287546eaSitojun break; 1127287546eaSitojun } 1128287546eaSitojun nd6_inuse++; 1129287546eaSitojun nd6_allocated++; 1130287546eaSitojun Bzero(ln, sizeof(*ln)); 1131287546eaSitojun ln->ln_rt = rt; 11329631a17bSitojun timeout_set(&ln->ln_timer_ch, nd6_llinfo_timer, ln); 1133287546eaSitojun /* this is required for "ndp" command. - shin */ 1134287546eaSitojun if (req == RTM_ADD) { 1135287546eaSitojun /* 1136287546eaSitojun * gate should have some valid AF_LINK entry, 1137287546eaSitojun * and ln->ln_expire should have some lifetime 1138287546eaSitojun * which is specified by ndp command. 1139287546eaSitojun */ 1140287546eaSitojun ln->ln_state = ND6_LLINFO_REACHABLE; 1141f6e55599Sitojun ln->ln_byhint = 0; 1142287546eaSitojun } else { 1143287546eaSitojun /* 1144287546eaSitojun * When req == RTM_RESOLVE, rt is created and 1145287546eaSitojun * initialized in rtrequest(), so rt_expire is 0. 1146287546eaSitojun */ 1147287546eaSitojun ln->ln_state = ND6_LLINFO_NOSTATE; 11489631a17bSitojun nd6_llinfo_settimer(ln, 0); 1149287546eaSitojun } 1150287546eaSitojun rt->rt_flags |= RTF_LLINFO; 1151287546eaSitojun ln->ln_next = llinfo_nd6.ln_next; 1152287546eaSitojun llinfo_nd6.ln_next = ln; 1153287546eaSitojun ln->ln_prev = &llinfo_nd6; 1154287546eaSitojun ln->ln_next->ln_prev = ln; 1155287546eaSitojun 1156287546eaSitojun /* 1157f3fcf2f3Smcbride * If we have too many cache entries, initiate immediate 1158f3fcf2f3Smcbride * purging for some "less recently used" entries. Note that 1159f3fcf2f3Smcbride * we cannot directly call nd6_free() here because it would 1160f3fcf2f3Smcbride * cause re-entering rtable related routines triggering an LOR 1161f3fcf2f3Smcbride * problem for FreeBSD. 1162f3fcf2f3Smcbride */ 1163f3fcf2f3Smcbride if (ip6_neighborgcthresh >= 0 && 1164f3fcf2f3Smcbride nd6_inuse >= ip6_neighborgcthresh) { 1165f3fcf2f3Smcbride int i; 1166f3fcf2f3Smcbride 1167f3fcf2f3Smcbride for (i = 0; i < 10 && llinfo_nd6.ln_prev != ln; i++) { 1168f3fcf2f3Smcbride struct llinfo_nd6 *ln_end = llinfo_nd6.ln_prev; 1169f3fcf2f3Smcbride 1170f3fcf2f3Smcbride /* Move this entry to the head */ 1171f3fcf2f3Smcbride LN_DEQUEUE(ln_end); 1172f3fcf2f3Smcbride LN_INSERTHEAD(ln_end); 1173f3fcf2f3Smcbride 1174f3fcf2f3Smcbride if (ND6_LLINFO_PERMANENT(ln_end)) 1175f3fcf2f3Smcbride continue; 1176f3fcf2f3Smcbride 1177f3fcf2f3Smcbride if (ln_end->ln_state > ND6_LLINFO_INCOMPLETE) 1178f3fcf2f3Smcbride ln_end->ln_state = ND6_LLINFO_STALE; 1179f3fcf2f3Smcbride else 1180f3fcf2f3Smcbride ln_end->ln_state = ND6_LLINFO_PURGE; 1181f3fcf2f3Smcbride nd6_llinfo_settimer(ln_end, 0); 1182f3fcf2f3Smcbride } 1183f3fcf2f3Smcbride } 1184f3fcf2f3Smcbride 1185f3fcf2f3Smcbride /* 1186287546eaSitojun * check if rt_key(rt) is one of my address assigned 1187287546eaSitojun * to the interface. 1188287546eaSitojun */ 1189287546eaSitojun ifa = (struct ifaddr *)in6ifa_ifpwithaddr(rt->rt_ifp, 1190287546eaSitojun &SIN6(rt_key(rt))->sin6_addr); 1191287546eaSitojun if (ifa) { 1192287546eaSitojun caddr_t macp = nd6_ifptomac(ifp); 11939631a17bSitojun nd6_llinfo_settimer(ln, -1); 1194287546eaSitojun ln->ln_state = ND6_LLINFO_REACHABLE; 1195f6e55599Sitojun ln->ln_byhint = 0; 1196287546eaSitojun if (macp) { 1197287546eaSitojun Bcopy(macp, LLADDR(SDL(gate)), ifp->if_addrlen); 1198287546eaSitojun SDL(gate)->sdl_alen = ifp->if_addrlen; 1199287546eaSitojun } 1200287546eaSitojun if (nd6_useloopback) { 1201fcc641efSmickey rt->rt_ifp = lo0ifp; /*XXX*/ 1202287546eaSitojun /* 1203287546eaSitojun * Make sure rt_ifa be equal to the ifaddr 1204287546eaSitojun * corresponding to the address. 1205287546eaSitojun * We need this because when we refer 1206287546eaSitojun * rt_ifa->ia6_flags in ip6_input, we assume 1207287546eaSitojun * that the rt_ifa points to the address instead 1208287546eaSitojun * of the loopback address. 1209287546eaSitojun */ 1210287546eaSitojun if (ifa != rt->rt_ifa) { 12114f587652Sitojun IFAFREE(rt->rt_ifa); 1212287546eaSitojun ifa->ifa_refcnt++; 1213287546eaSitojun rt->rt_ifa = ifa; 1214287546eaSitojun } 1215287546eaSitojun } 1216f4f4d166Sitojun } else if (rt->rt_flags & RTF_ANNOUNCE) { 12179631a17bSitojun nd6_llinfo_settimer(ln, -1); 1218f4f4d166Sitojun ln->ln_state = ND6_LLINFO_REACHABLE; 1219f6e55599Sitojun ln->ln_byhint = 0; 1220f4f4d166Sitojun 1221f4f4d166Sitojun /* join solicited node multicast for proxy ND */ 1222f4f4d166Sitojun if (ifp->if_flags & IFF_MULTICAST) { 1223f4f4d166Sitojun struct in6_addr llsol; 1224f4f4d166Sitojun int error; 1225f4f4d166Sitojun 1226f4f4d166Sitojun llsol = SIN6(rt_key(rt))->sin6_addr; 1227f4f4d166Sitojun llsol.s6_addr16[0] = htons(0xff02); 1228f4f4d166Sitojun llsol.s6_addr16[1] = htons(ifp->if_index); 1229f4f4d166Sitojun llsol.s6_addr32[1] = 0; 1230f4f4d166Sitojun llsol.s6_addr32[2] = htonl(1); 1231f4f4d166Sitojun llsol.s6_addr8[12] = 0xff; 1232f4f4d166Sitojun 1233d8a7e3a7Sitojun if (in6_addmulti(&llsol, ifp, &error)) { 1234d8a7e3a7Sitojun nd6log((LOG_ERR, "%s: failed to join " 1235d8a7e3a7Sitojun "%s (errno=%d)\n", ifp->if_xname, 1236d8a7e3a7Sitojun ip6_sprintf(&llsol), error)); 1237d8a7e3a7Sitojun } 1238f4f4d166Sitojun } 1239287546eaSitojun } 1240287546eaSitojun break; 1241287546eaSitojun 1242287546eaSitojun case RTM_DELETE: 1243287546eaSitojun if (!ln) 1244287546eaSitojun break; 1245f4f4d166Sitojun /* leave from solicited node multicast for proxy ND */ 1246f4f4d166Sitojun if ((rt->rt_flags & RTF_ANNOUNCE) != 0 && 1247f4f4d166Sitojun (ifp->if_flags & IFF_MULTICAST) != 0) { 1248f4f4d166Sitojun struct in6_addr llsol; 1249f4f4d166Sitojun struct in6_multi *in6m; 1250f4f4d166Sitojun 1251f4f4d166Sitojun llsol = SIN6(rt_key(rt))->sin6_addr; 1252f4f4d166Sitojun llsol.s6_addr16[0] = htons(0xff02); 1253f4f4d166Sitojun llsol.s6_addr16[1] = htons(ifp->if_index); 1254f4f4d166Sitojun llsol.s6_addr32[1] = 0; 1255f4f4d166Sitojun llsol.s6_addr32[2] = htonl(1); 1256f4f4d166Sitojun llsol.s6_addr8[12] = 0xff; 1257f4f4d166Sitojun 1258f4f4d166Sitojun IN6_LOOKUP_MULTI(llsol, ifp, in6m); 1259f4f4d166Sitojun if (in6m) 1260f4f4d166Sitojun in6_delmulti(in6m); 1261f4f4d166Sitojun } 1262287546eaSitojun nd6_inuse--; 1263287546eaSitojun ln->ln_next->ln_prev = ln->ln_prev; 1264287546eaSitojun ln->ln_prev->ln_next = ln->ln_next; 1265287546eaSitojun ln->ln_prev = NULL; 12669631a17bSitojun nd6_llinfo_settimer(ln, -1); 1267287546eaSitojun rt->rt_llinfo = 0; 1268287546eaSitojun rt->rt_flags &= ~RTF_LLINFO; 1269287546eaSitojun if (ln->ln_hold) 1270287546eaSitojun m_freem(ln->ln_hold); 1271287546eaSitojun Free((caddr_t)ln); 1272287546eaSitojun } 1273287546eaSitojun } 1274287546eaSitojun 1275287546eaSitojun int 1276ee37ea65Smcbride nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp) 1277287546eaSitojun { 1278287546eaSitojun struct in6_drlist *drl = (struct in6_drlist *)data; 1279d8a7e3a7Sitojun struct in6_oprlist *oprl = (struct in6_oprlist *)data; 1280287546eaSitojun struct in6_ndireq *ndi = (struct in6_ndireq *)data; 1281287546eaSitojun struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1282f4f4d166Sitojun struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1283d8a7e3a7Sitojun struct nd_defrouter *dr; 1284287546eaSitojun struct nd_prefix *pr; 1285287546eaSitojun struct rtentry *rt; 1286287546eaSitojun int i = 0, error = 0; 1287287546eaSitojun int s; 1288287546eaSitojun 1289287546eaSitojun switch (cmd) { 1290287546eaSitojun case SIOCGDRLST_IN6: 1291d8a7e3a7Sitojun /* 1292d8a7e3a7Sitojun * obsolete API, use sysctl under net.inet6.icmp6 1293d8a7e3a7Sitojun */ 1294287546eaSitojun bzero(drl, sizeof(*drl)); 12956e92dee6Sitojun s = splsoftnet(); 1296f4f4d166Sitojun dr = TAILQ_FIRST(&nd_defrouter); 1297287546eaSitojun while (dr && i < DRLSTSIZ) { 1298287546eaSitojun drl->defrouter[i].rtaddr = dr->rtaddr; 1299287546eaSitojun if (IN6_IS_ADDR_LINKLOCAL(&drl->defrouter[i].rtaddr)) { 1300287546eaSitojun /* XXX: need to this hack for KAME stack */ 1301287546eaSitojun drl->defrouter[i].rtaddr.s6_addr16[1] = 0; 1302f6e55599Sitojun } else 1303287546eaSitojun log(LOG_ERR, 1304287546eaSitojun "default router list contains a " 1305287546eaSitojun "non-linklocal address(%s)\n", 1306287546eaSitojun ip6_sprintf(&drl->defrouter[i].rtaddr)); 1307287546eaSitojun 1308287546eaSitojun drl->defrouter[i].flags = dr->flags; 1309287546eaSitojun drl->defrouter[i].rtlifetime = dr->rtlifetime; 1310287546eaSitojun drl->defrouter[i].expire = dr->expire; 1311287546eaSitojun drl->defrouter[i].if_index = dr->ifp->if_index; 1312287546eaSitojun i++; 1313f4f4d166Sitojun dr = TAILQ_NEXT(dr, dr_entry); 1314287546eaSitojun } 1315287546eaSitojun splx(s); 1316287546eaSitojun break; 1317287546eaSitojun case SIOCGPRLST_IN6: 1318f4f4d166Sitojun /* 1319d8a7e3a7Sitojun * obsolete API, use sysctl under net.inet6.icmp6 1320d8a7e3a7Sitojun * 1321d8a7e3a7Sitojun * XXX the structure in6_prlist was changed in backward- 1322d8a7e3a7Sitojun * incompatible manner. in6_oprlist is used for SIOCGPRLST_IN6, 1323d8a7e3a7Sitojun * in6_prlist is used for nd6_sysctl() - fill_prlist(). 1324d8a7e3a7Sitojun */ 1325d8a7e3a7Sitojun /* 13268b542bbeSpascoe * XXX meaning of fields, especially "raflags", is very 13278b542bbeSpascoe * different between RA prefix list and RR/static prefix list. 1328f4f4d166Sitojun * how about separating ioctls into two? 1329f4f4d166Sitojun */ 1330d8a7e3a7Sitojun bzero(oprl, sizeof(*oprl)); 13316e92dee6Sitojun s = splsoftnet(); 1332545205eaSpyr pr = LIST_FIRST(&nd_prefix); 1333287546eaSitojun while (pr && i < PRLSTSIZ) { 1334287546eaSitojun struct nd_pfxrouter *pfr; 1335287546eaSitojun int j; 1336287546eaSitojun 1337d8a7e3a7Sitojun oprl->prefix[i].prefix = pr->ndpr_prefix.sin6_addr; 1338d8a7e3a7Sitojun oprl->prefix[i].raflags = pr->ndpr_raf; 1339d8a7e3a7Sitojun oprl->prefix[i].prefixlen = pr->ndpr_plen; 1340d8a7e3a7Sitojun oprl->prefix[i].vltime = pr->ndpr_vltime; 1341d8a7e3a7Sitojun oprl->prefix[i].pltime = pr->ndpr_pltime; 1342d8a7e3a7Sitojun oprl->prefix[i].if_index = pr->ndpr_ifp->if_index; 1343d8a7e3a7Sitojun oprl->prefix[i].expire = pr->ndpr_expire; 1344287546eaSitojun 1345545205eaSpyr pfr = LIST_FIRST(&pr->ndpr_advrtrs); 1346287546eaSitojun j = 0; 1347287546eaSitojun while(pfr) { 1348287546eaSitojun if (j < DRLSTSIZ) { 1349d8a7e3a7Sitojun #define RTRADDR oprl->prefix[i].advrtr[j] 1350287546eaSitojun RTRADDR = pfr->router->rtaddr; 1351287546eaSitojun if (IN6_IS_ADDR_LINKLOCAL(&RTRADDR)) { 1352287546eaSitojun /* XXX: hack for KAME */ 1353287546eaSitojun RTRADDR.s6_addr16[1] = 0; 1354f6e55599Sitojun } else 1355287546eaSitojun log(LOG_ERR, 1356287546eaSitojun "a router(%s) advertises " 1357287546eaSitojun "a prefix with " 1358287546eaSitojun "non-link local address\n", 1359287546eaSitojun ip6_sprintf(&RTRADDR)); 1360287546eaSitojun #undef RTRADDR 1361287546eaSitojun } 1362287546eaSitojun j++; 1363545205eaSpyr pfr = LIST_NEXT(pfr, pfr_entry); 1364287546eaSitojun } 1365d8a7e3a7Sitojun oprl->prefix[i].advrtrs = j; 1366d8a7e3a7Sitojun oprl->prefix[i].origin = PR_ORIG_RA; 1367287546eaSitojun 1368287546eaSitojun i++; 1369545205eaSpyr pr = LIST_NEXT(pr, ndpr_entry); 1370287546eaSitojun } 1371f4f4d166Sitojun splx(s); 1372287546eaSitojun 1373287546eaSitojun break; 1374d6b9e9b9Sitojun case OSIOCGIFINFO_IN6: 1375d6b9e9b9Sitojun /* XXX: old ndp(8) assumes a positive value for linkmtu. */ 1376191a775dSitojun bzero(&ndi->ndi, sizeof(ndi->ndi)); 1377d6b9e9b9Sitojun ndi->ndi.linkmtu = IN6_LINKMTU(ifp); 1378d6b9e9b9Sitojun ndi->ndi.maxmtu = ND_IFINFO(ifp)->maxmtu; 1379d6b9e9b9Sitojun ndi->ndi.basereachable = ND_IFINFO(ifp)->basereachable; 1380d6b9e9b9Sitojun ndi->ndi.reachable = ND_IFINFO(ifp)->reachable; 1381d6b9e9b9Sitojun ndi->ndi.retrans = ND_IFINFO(ifp)->retrans; 1382d6b9e9b9Sitojun ndi->ndi.flags = ND_IFINFO(ifp)->flags; 1383d6b9e9b9Sitojun ndi->ndi.recalctm = ND_IFINFO(ifp)->recalctm; 1384d6b9e9b9Sitojun ndi->ndi.chlim = ND_IFINFO(ifp)->chlim; 1385cfab95f2Sitojun break; 1386d6b9e9b9Sitojun case SIOCGIFINFO_IN6: 1387d6b9e9b9Sitojun ndi->ndi = *ND_IFINFO(ifp); 1388287546eaSitojun break; 1389d374aaacSitojun case SIOCSIFINFO_FLAGS: 1390d6b9e9b9Sitojun ND_IFINFO(ifp)->flags = ndi->ndi.flags; 1391d374aaacSitojun break; 1392f4f4d166Sitojun case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1393d8a7e3a7Sitojun /* sync kernel routing table with the default router list */ 1394d8a7e3a7Sitojun defrouter_reset(); 1395f4f4d166Sitojun defrouter_select(); 1396287546eaSitojun break; 1397287546eaSitojun case SIOCSPFXFLUSH_IN6: 1398287546eaSitojun { 1399287546eaSitojun /* flush all the prefix advertised by routers */ 1400287546eaSitojun struct nd_prefix *pr, *next; 1401287546eaSitojun 14026e92dee6Sitojun s = splsoftnet(); 1403545205eaSpyr for (pr = LIST_FIRST(&nd_prefix); pr; pr = next) { 1404d8a7e3a7Sitojun struct in6_ifaddr *ia, *ia_next; 1405d8a7e3a7Sitojun 1406545205eaSpyr next = LIST_NEXT(pr, ndpr_entry); 1407d8a7e3a7Sitojun 1408d8a7e3a7Sitojun if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) 1409d8a7e3a7Sitojun continue; /* XXX */ 1410d8a7e3a7Sitojun 1411d8a7e3a7Sitojun /* do we really have to remove addresses as well? */ 1412d8a7e3a7Sitojun for (ia = in6_ifaddr; ia; ia = ia_next) { 1413d8a7e3a7Sitojun /* ia might be removed. keep the next ptr. */ 1414d8a7e3a7Sitojun ia_next = ia->ia_next; 1415d8a7e3a7Sitojun 1416d8a7e3a7Sitojun if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) 1417d8a7e3a7Sitojun continue; 1418d8a7e3a7Sitojun 1419d8a7e3a7Sitojun if (ia->ia6_ndpr == pr) 1420d8a7e3a7Sitojun in6_purgeaddr(&ia->ia_ifa); 1421d8a7e3a7Sitojun } 1422287546eaSitojun prelist_remove(pr); 1423287546eaSitojun } 1424287546eaSitojun splx(s); 1425287546eaSitojun break; 1426287546eaSitojun } 1427287546eaSitojun case SIOCSRTRFLUSH_IN6: 1428287546eaSitojun { 1429287546eaSitojun /* flush all the default routers */ 1430287546eaSitojun struct nd_defrouter *dr, *next; 1431287546eaSitojun 14326e92dee6Sitojun s = splsoftnet(); 1433d8a7e3a7Sitojun defrouter_reset(); 1434d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = next) { 1435f4f4d166Sitojun next = TAILQ_NEXT(dr, dr_entry); 1436287546eaSitojun defrtrlist_del(dr); 1437287546eaSitojun } 1438d8a7e3a7Sitojun defrouter_select(); 1439287546eaSitojun splx(s); 1440287546eaSitojun break; 1441287546eaSitojun } 1442287546eaSitojun case SIOCGNBRINFO_IN6: 1443287546eaSitojun { 1444287546eaSitojun struct llinfo_nd6 *ln; 1445287546eaSitojun struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 1446287546eaSitojun 1447287546eaSitojun /* 1448287546eaSitojun * XXX: KAME specific hack for scoped addresses 1449287546eaSitojun * XXXX: for other scopes than link-local? 1450287546eaSitojun */ 1451287546eaSitojun if (IN6_IS_ADDR_LINKLOCAL(&nbi->addr) || 1452287546eaSitojun IN6_IS_ADDR_MC_LINKLOCAL(&nbi->addr)) { 1453287546eaSitojun u_int16_t *idp = (u_int16_t *)&nb_addr.s6_addr[2]; 1454287546eaSitojun 1455287546eaSitojun if (*idp == 0) 1456287546eaSitojun *idp = htons(ifp->if_index); 1457287546eaSitojun } 1458287546eaSitojun 14596e92dee6Sitojun s = splsoftnet(); 1460d8a7e3a7Sitojun if ((rt = nd6_lookup(&nb_addr, 0, ifp)) == NULL || 1461d8a7e3a7Sitojun (ln = (struct llinfo_nd6 *)rt->rt_llinfo) == NULL) { 1462287546eaSitojun error = EINVAL; 146391e69634Sitojun splx(s); 1464287546eaSitojun break; 1465287546eaSitojun } 1466287546eaSitojun nbi->state = ln->ln_state; 1467287546eaSitojun nbi->asked = ln->ln_asked; 1468287546eaSitojun nbi->isrouter = ln->ln_router; 1469287546eaSitojun nbi->expire = ln->ln_expire; 1470287546eaSitojun splx(s); 1471287546eaSitojun 1472287546eaSitojun break; 1473287546eaSitojun } 1474f4f4d166Sitojun case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1475f4f4d166Sitojun ndif->ifindex = nd6_defifindex; 1476f4f4d166Sitojun break; 1477f4f4d166Sitojun case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1478f4f4d166Sitojun return (nd6_setdefaultiface(ndif->ifindex)); 1479f4f4d166Sitojun break; 1480287546eaSitojun } 1481287546eaSitojun return (error); 1482287546eaSitojun } 1483287546eaSitojun 1484287546eaSitojun /* 1485287546eaSitojun * Create neighbor cache entry and cache link-layer address, 1486287546eaSitojun * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 1487ee37ea65Smcbride * 1488ee37ea65Smcbride * type - ICMP6 type 1489ee37ea65Smcbride * code - type dependent information 1490287546eaSitojun */ 1491287546eaSitojun struct rtentry * 1492ee37ea65Smcbride nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr, 1493ee37ea65Smcbride int lladdrlen, int type, int code) 1494287546eaSitojun { 1495287546eaSitojun struct rtentry *rt = NULL; 1496287546eaSitojun struct llinfo_nd6 *ln = NULL; 1497287546eaSitojun int is_newentry; 1498287546eaSitojun struct sockaddr_dl *sdl = NULL; 1499287546eaSitojun int do_update; 1500287546eaSitojun int olladdr; 1501287546eaSitojun int llchange; 1502287546eaSitojun int newstate = 0; 1503287546eaSitojun 1504287546eaSitojun if (!ifp) 1505287546eaSitojun panic("ifp == NULL in nd6_cache_lladdr"); 1506287546eaSitojun if (!from) 1507287546eaSitojun panic("from == NULL in nd6_cache_lladdr"); 1508287546eaSitojun 1509287546eaSitojun /* nothing must be updated for unspecified address */ 1510287546eaSitojun if (IN6_IS_ADDR_UNSPECIFIED(from)) 1511287546eaSitojun return NULL; 1512287546eaSitojun 1513287546eaSitojun /* 1514287546eaSitojun * Validation about ifp->if_addrlen and lladdrlen must be done in 1515287546eaSitojun * the caller. 1516287546eaSitojun * 15178b542bbeSpascoe * XXX If the link does not have link-layer address, what should 1518287546eaSitojun * we do? (ifp->if_addrlen == 0) 1519287546eaSitojun * Spec says nothing in sections for RA, RS and NA. There's small 1520287546eaSitojun * description on it in NS section (RFC 2461 7.2.3). 1521287546eaSitojun */ 1522287546eaSitojun 1523287546eaSitojun rt = nd6_lookup(from, 0, ifp); 1524287546eaSitojun if (!rt) { 1525287546eaSitojun #if 0 1526287546eaSitojun /* nothing must be done if there's no lladdr */ 1527287546eaSitojun if (!lladdr || !lladdrlen) 1528287546eaSitojun return NULL; 1529287546eaSitojun #endif 1530287546eaSitojun 1531287546eaSitojun rt = nd6_lookup(from, 1, ifp); 1532287546eaSitojun is_newentry = 1; 15330a2c5741Sitojun } else { 15340a2c5741Sitojun /* do nothing if static ndp is set */ 15350a2c5741Sitojun if (rt->rt_flags & RTF_STATIC) 15360a2c5741Sitojun return NULL; 1537287546eaSitojun is_newentry = 0; 15380a2c5741Sitojun } 1539287546eaSitojun 1540287546eaSitojun if (!rt) 1541287546eaSitojun return NULL; 1542287546eaSitojun if ((rt->rt_flags & (RTF_GATEWAY | RTF_LLINFO)) != RTF_LLINFO) { 1543287546eaSitojun fail: 1544d8a7e3a7Sitojun (void)nd6_free(rt, 0); 1545287546eaSitojun return NULL; 1546287546eaSitojun } 1547287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1548287546eaSitojun if (!ln) 1549287546eaSitojun goto fail; 1550287546eaSitojun if (!rt->rt_gateway) 1551287546eaSitojun goto fail; 1552287546eaSitojun if (rt->rt_gateway->sa_family != AF_LINK) 1553287546eaSitojun goto fail; 1554287546eaSitojun sdl = SDL(rt->rt_gateway); 1555287546eaSitojun 1556287546eaSitojun olladdr = (sdl->sdl_alen) ? 1 : 0; 1557287546eaSitojun if (olladdr && lladdr) { 1558287546eaSitojun if (bcmp(lladdr, LLADDR(sdl), ifp->if_addrlen)) 1559287546eaSitojun llchange = 1; 1560287546eaSitojun else 1561287546eaSitojun llchange = 0; 1562287546eaSitojun } else 1563287546eaSitojun llchange = 0; 1564287546eaSitojun 1565287546eaSitojun /* 1566287546eaSitojun * newentry olladdr lladdr llchange (*=record) 1567287546eaSitojun * 0 n n -- (1) 1568287546eaSitojun * 0 y n -- (2) 1569287546eaSitojun * 0 n y -- (3) * STALE 1570287546eaSitojun * 0 y y n (4) * 1571287546eaSitojun * 0 y y y (5) * STALE 1572287546eaSitojun * 1 -- n -- (6) NOSTATE(= PASSIVE) 1573287546eaSitojun * 1 -- y -- (7) * STALE 1574287546eaSitojun */ 1575287546eaSitojun 1576287546eaSitojun if (lladdr) { /* (3-5) and (7) */ 1577287546eaSitojun /* 1578287546eaSitojun * Record source link-layer address 1579287546eaSitojun * XXX is it dependent to ifp->if_type? 1580287546eaSitojun */ 1581287546eaSitojun sdl->sdl_alen = ifp->if_addrlen; 1582287546eaSitojun bcopy(lladdr, LLADDR(sdl), ifp->if_addrlen); 1583287546eaSitojun } 1584287546eaSitojun 1585287546eaSitojun if (!is_newentry) { 1586d8a7e3a7Sitojun if ((!olladdr && lladdr) || /* (3) */ 1587d8a7e3a7Sitojun (olladdr && lladdr && llchange)) { /* (5) */ 1588287546eaSitojun do_update = 1; 1589287546eaSitojun newstate = ND6_LLINFO_STALE; 1590287546eaSitojun } else /* (1-2,4) */ 1591287546eaSitojun do_update = 0; 1592287546eaSitojun } else { 1593287546eaSitojun do_update = 1; 1594287546eaSitojun if (!lladdr) /* (6) */ 1595287546eaSitojun newstate = ND6_LLINFO_NOSTATE; 1596287546eaSitojun else /* (7) */ 1597287546eaSitojun newstate = ND6_LLINFO_STALE; 1598287546eaSitojun } 1599287546eaSitojun 1600287546eaSitojun if (do_update) { 1601287546eaSitojun /* 1602287546eaSitojun * Update the state of the neighbor cache. 1603287546eaSitojun */ 1604287546eaSitojun ln->ln_state = newstate; 1605287546eaSitojun 1606287546eaSitojun if (ln->ln_state == ND6_LLINFO_STALE) { 16078a7bb304Sitojun /* 16088a7bb304Sitojun * XXX: since nd6_output() below will cause 16098b542bbeSpascoe * state transition to DELAY and reset the timer, 16108a7bb304Sitojun * we must set the timer now, although it is actually 16118a7bb304Sitojun * meaningless. 16128a7bb304Sitojun */ 16139631a17bSitojun nd6_llinfo_settimer(ln, (long)nd6_gctimer * hz); 16148a7bb304Sitojun 1615287546eaSitojun if (ln->ln_hold) { 1616e212adedSkrw struct mbuf *n = ln->ln_hold; 1617e212adedSkrw ln->ln_hold = NULL; 16186afad192Sitojun /* 16196afad192Sitojun * we assume ifp is not a p2p here, so just 16206afad192Sitojun * set the 2nd argument as the 1st one. 16216afad192Sitojun */ 1622e212adedSkrw nd6_output(ifp, ifp, n, 1623d8a7e3a7Sitojun (struct sockaddr_in6 *)rt_key(rt), rt); 1624e212adedSkrw if (ln->ln_hold == n) { 1625e212adedSkrw /* n is back in ln_hold. Discard. */ 1626e212adedSkrw m_freem(ln->ln_hold); 16278a7bb304Sitojun ln->ln_hold = NULL; 1628287546eaSitojun } 1629e212adedSkrw } 1630287546eaSitojun } else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) { 1631287546eaSitojun /* probe right away */ 16329631a17bSitojun nd6_llinfo_settimer((void *)ln, 0); 1633287546eaSitojun } 1634287546eaSitojun } 1635287546eaSitojun 1636287546eaSitojun /* 1637287546eaSitojun * ICMP6 type dependent behavior. 1638287546eaSitojun * 1639287546eaSitojun * NS: clear IsRouter if new entry 1640287546eaSitojun * RS: clear IsRouter 1641287546eaSitojun * RA: set IsRouter if there's lladdr 1642287546eaSitojun * redir: clear IsRouter if new entry 1643287546eaSitojun * 1644287546eaSitojun * RA case, (1): 1645287546eaSitojun * The spec says that we must set IsRouter in the following cases: 1646287546eaSitojun * - If lladdr exist, set IsRouter. This means (1-5). 1647287546eaSitojun * - If it is old entry (!newentry), set IsRouter. This means (7). 1648287546eaSitojun * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 16498b542bbeSpascoe * A question arises for (1) case. (1) case has no lladdr in the 1650287546eaSitojun * neighbor cache, this is similar to (6). 1651287546eaSitojun * This case is rare but we figured that we MUST NOT set IsRouter. 1652287546eaSitojun * 1653287546eaSitojun * newentry olladdr lladdr llchange NS RS RA redir 1654287546eaSitojun * D R 1655287546eaSitojun * 0 n n -- (1) c ? s 1656287546eaSitojun * 0 y n -- (2) c s s 1657287546eaSitojun * 0 n y -- (3) c s s 1658287546eaSitojun * 0 y y n (4) c s s 1659287546eaSitojun * 0 y y y (5) c s s 1660287546eaSitojun * 1 -- n -- (6) c c c s 1661287546eaSitojun * 1 -- y -- (7) c c s c s 1662287546eaSitojun * 1663287546eaSitojun * (c=clear s=set) 1664287546eaSitojun */ 1665287546eaSitojun switch (type & 0xff) { 1666287546eaSitojun case ND_NEIGHBOR_SOLICIT: 1667287546eaSitojun /* 1668287546eaSitojun * New entry must have is_router flag cleared. 1669287546eaSitojun */ 1670287546eaSitojun if (is_newentry) /* (6-7) */ 1671287546eaSitojun ln->ln_router = 0; 1672287546eaSitojun break; 1673287546eaSitojun case ND_REDIRECT: 1674287546eaSitojun /* 1675287546eaSitojun * If the icmp is a redirect to a better router, always set the 1676287546eaSitojun * is_router flag. Otherwise, if the entry is newly created, 1677287546eaSitojun * clear the flag. [RFC 2461, sec 8.3] 1678287546eaSitojun */ 1679287546eaSitojun if (code == ND_REDIRECT_ROUTER) 1680287546eaSitojun ln->ln_router = 1; 1681287546eaSitojun else if (is_newentry) /* (6-7) */ 1682287546eaSitojun ln->ln_router = 0; 1683287546eaSitojun break; 1684287546eaSitojun case ND_ROUTER_SOLICIT: 1685287546eaSitojun /* 1686287546eaSitojun * is_router flag must always be cleared. 1687287546eaSitojun */ 1688287546eaSitojun ln->ln_router = 0; 1689287546eaSitojun break; 1690287546eaSitojun case ND_ROUTER_ADVERT: 1691287546eaSitojun /* 1692287546eaSitojun * Mark an entry with lladdr as a router. 1693287546eaSitojun */ 1694d8a7e3a7Sitojun if ((!is_newentry && (olladdr || lladdr)) || /* (2-5) */ 1695d8a7e3a7Sitojun (is_newentry && lladdr)) { /* (7) */ 1696287546eaSitojun ln->ln_router = 1; 1697287546eaSitojun } 1698287546eaSitojun break; 1699287546eaSitojun } 1700287546eaSitojun 170150ccc024Sitojun /* 170250ccc024Sitojun * When the link-layer address of a router changes, select the 170350ccc024Sitojun * best router again. In particular, when the neighbor entry is newly 170450ccc024Sitojun * created, it might affect the selection policy. 170550ccc024Sitojun * Question: can we restrict the first condition to the "is_newentry" 170650ccc024Sitojun * case? 170750ccc024Sitojun * XXX: when we hear an RA from a new router with the link-layer 170850ccc024Sitojun * address option, defrouter_select() is called twice, since 170950ccc024Sitojun * defrtrlist_update called the function as well. However, I believe 171050ccc024Sitojun * we can compromise the overhead, since it only happens the first 171150ccc024Sitojun * time. 1712d8a7e3a7Sitojun * XXX: although defrouter_select() should not have a bad effect 1713d8a7e3a7Sitojun * for those are not autoconfigured hosts, we explicitly avoid such 1714d8a7e3a7Sitojun * cases for safety. 171550ccc024Sitojun */ 171629ee75acSitojun if (do_update && ln->ln_router && !ip6_forwarding && ip6_accept_rtadv) 171750ccc024Sitojun defrouter_select(); 171850ccc024Sitojun 1719287546eaSitojun return rt; 1720287546eaSitojun } 1721287546eaSitojun 1722*a0aa363cSjsing void 1723ee37ea65Smcbride nd6_slowtimo(void *ignored_arg) 1724287546eaSitojun { 17256e92dee6Sitojun int s = splsoftnet(); 1726b3c1e4c1Sitojun struct nd_ifinfo *nd6if; 1727d6b9e9b9Sitojun struct ifnet *ifp; 1728287546eaSitojun 1729b3c1e4c1Sitojun timeout_set(&nd6_slowtimo_ch, nd6_slowtimo, NULL); 173029e86e5eSblambert timeout_add_sec(&nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL); 1731d6b9e9b9Sitojun for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 1732d6b9e9b9Sitojun { 1733d6b9e9b9Sitojun nd6if = ND_IFINFO(ifp); 1734287546eaSitojun if (nd6if->basereachable && /* already initialized */ 1735287546eaSitojun (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 1736287546eaSitojun /* 1737287546eaSitojun * Since reachable time rarely changes by router 1738287546eaSitojun * advertisements, we SHOULD insure that a new random 1739287546eaSitojun * value gets recomputed at least once every few hours. 1740287546eaSitojun * (RFC 2461, 6.3.4) 1741287546eaSitojun */ 1742287546eaSitojun nd6if->recalctm = nd6_recalc_reachtm_interval; 1743287546eaSitojun nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 1744287546eaSitojun } 1745287546eaSitojun } 1746287546eaSitojun splx(s); 1747287546eaSitojun } 1748287546eaSitojun 1749287546eaSitojun #define senderr(e) { error = (e); goto bad;} 1750287546eaSitojun int 1751ee37ea65Smcbride nd6_output(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m0, 1752ee37ea65Smcbride struct sockaddr_in6 *dst, struct rtentry *rt0) 1753287546eaSitojun { 1754b3c1e4c1Sitojun struct mbuf *m = m0; 1755b3c1e4c1Sitojun struct rtentry *rt = rt0; 1756cfb6b8dfSitojun struct sockaddr_in6 *gw6 = NULL; 1757287546eaSitojun struct llinfo_nd6 *ln = NULL; 1758287546eaSitojun int error = 0; 1759cb39d30aSangelos #ifdef IPSEC 1760cb39d30aSangelos struct m_tag *mtag; 1761cb39d30aSangelos #endif /* IPSEC */ 1762287546eaSitojun 1763287546eaSitojun if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr)) 1764287546eaSitojun goto sendpkt; 1765287546eaSitojun 1766d8a7e3a7Sitojun if (nd6_need_cache(ifp) == 0) 1767287546eaSitojun goto sendpkt; 1768287546eaSitojun 1769287546eaSitojun /* 17708b542bbeSpascoe * next hop determination. This routine is derived from ether_output. 1771287546eaSitojun */ 1772287546eaSitojun if (rt) { 1773287546eaSitojun if ((rt->rt_flags & RTF_UP) == 0) { 1774d8a7e3a7Sitojun if ((rt0 = rt = rtalloc1((struct sockaddr *)dst, 1775c241aca8Shenning 1, 0)) != NULL) 1776287546eaSitojun { 1777287546eaSitojun rt->rt_refcnt--; 1778fe16f6efSitojun if (rt->rt_ifp != ifp) 1779fe16f6efSitojun senderr(EHOSTUNREACH); 1780287546eaSitojun } else 1781287546eaSitojun senderr(EHOSTUNREACH); 1782287546eaSitojun } 1783cfb6b8dfSitojun 1784287546eaSitojun if (rt->rt_flags & RTF_GATEWAY) { 1785cfb6b8dfSitojun gw6 = (struct sockaddr_in6 *)rt->rt_gateway; 1786cfb6b8dfSitojun 1787cfb6b8dfSitojun /* 1788cfb6b8dfSitojun * We skip link-layer address resolution and NUD 1789cfb6b8dfSitojun * if the gateway is not a neighbor from ND point 1790d8a7e3a7Sitojun * of view, regardless of the value of nd_ifinfo.flags. 179134deef1eSitojun * The second condition is a bit tricky; we skip 1792cfb6b8dfSitojun * if the gateway is our own address, which is 1793cfb6b8dfSitojun * sometimes used to install a route to a p2p link. 1794cfb6b8dfSitojun */ 1795cfb6b8dfSitojun if (!nd6_is_addr_neighbor(gw6, ifp) || 1796cfb6b8dfSitojun in6ifa_ifpwithaddr(ifp, &gw6->sin6_addr)) { 1797cfb6b8dfSitojun /* 1798cfb6b8dfSitojun * We allow this kind of tricky route only 1799cfb6b8dfSitojun * when the outgoing interface is p2p. 1800cfb6b8dfSitojun * XXX: we may need a more generic rule here. 1801cfb6b8dfSitojun */ 1802cfb6b8dfSitojun if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1803cfb6b8dfSitojun senderr(EHOSTUNREACH); 1804cfb6b8dfSitojun 1805cfb6b8dfSitojun goto sendpkt; 1806cfb6b8dfSitojun } 1807cfb6b8dfSitojun 1808287546eaSitojun if (rt->rt_gwroute == 0) 1809287546eaSitojun goto lookup; 1810287546eaSitojun if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 1811287546eaSitojun rtfree(rt); rt = rt0; 1812d8a7e3a7Sitojun lookup: 1813c241aca8Shenning rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, 0); 1814287546eaSitojun if ((rt = rt->rt_gwroute) == 0) 1815287546eaSitojun senderr(EHOSTUNREACH); 1816287546eaSitojun } 1817287546eaSitojun } 1818287546eaSitojun } 1819287546eaSitojun 1820287546eaSitojun /* 1821287546eaSitojun * Address resolution or Neighbor Unreachability Detection 1822287546eaSitojun * for the next hop. 1823287546eaSitojun * At this point, the destination of the packet must be a unicast 1824287546eaSitojun * or an anycast address(i.e. not a multicast). 1825287546eaSitojun */ 1826287546eaSitojun 1827287546eaSitojun /* Look up the neighbor cache for the nexthop */ 1828287546eaSitojun if (rt && (rt->rt_flags & RTF_LLINFO) != 0) 1829287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1830287546eaSitojun else { 1831cfb6b8dfSitojun /* 1832cfb6b8dfSitojun * Since nd6_is_addr_neighbor() internally calls nd6_lookup(), 1833cfb6b8dfSitojun * the condition below is not very efficient. But we believe 1834cfb6b8dfSitojun * it is tolerable, because this should be a rare case. 1835cfb6b8dfSitojun */ 1836cfb6b8dfSitojun if (nd6_is_addr_neighbor(dst, ifp) && 1837cfb6b8dfSitojun (rt = nd6_lookup(&dst->sin6_addr, 1, ifp)) != NULL) 1838287546eaSitojun ln = (struct llinfo_nd6 *)rt->rt_llinfo; 1839287546eaSitojun } 1840287546eaSitojun if (!ln || !rt) { 1841cfb6b8dfSitojun if ((ifp->if_flags & IFF_POINTOPOINT) == 0 && 1842d6b9e9b9Sitojun !(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) { 1843cfb6b8dfSitojun log(LOG_DEBUG, 1844cfb6b8dfSitojun "nd6_output: can't allocate llinfo for %s " 1845287546eaSitojun "(ln=%p, rt=%p)\n", 1846287546eaSitojun ip6_sprintf(&dst->sin6_addr), ln, rt); 1847287546eaSitojun senderr(EIO); /* XXX: good error? */ 1848287546eaSitojun } 1849287546eaSitojun 1850cfb6b8dfSitojun goto sendpkt; /* send anyway */ 1851cfb6b8dfSitojun } 1852cfb6b8dfSitojun 1853f3fcf2f3Smcbride /* 1854f3fcf2f3Smcbride * Move this entry to the head of the queue so that it is less likely 1855f3fcf2f3Smcbride * for this entry to be a target of forced garbage collection (see 1856f3fcf2f3Smcbride * nd6_rtrequest()). 1857f3fcf2f3Smcbride */ 1858f3fcf2f3Smcbride LN_DEQUEUE(ln); 1859f3fcf2f3Smcbride LN_INSERTHEAD(ln); 1860f3fcf2f3Smcbride 1861d374aaacSitojun /* We don't have to do link-layer address resolution on a p2p link. */ 1862d374aaacSitojun if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 1863be4e9e12Sitojun ln->ln_state < ND6_LLINFO_REACHABLE) { 1864d374aaacSitojun ln->ln_state = ND6_LLINFO_STALE; 18659631a17bSitojun nd6_llinfo_settimer(ln, (long)nd6_gctimer * hz); 1866be4e9e12Sitojun } 1867287546eaSitojun 1868287546eaSitojun /* 1869287546eaSitojun * The first time we send a packet to a neighbor whose entry is 1870287546eaSitojun * STALE, we have to change the state to DELAY and a sets a timer to 1871287546eaSitojun * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 1872287546eaSitojun * neighbor unreachability detection on expiration. 1873287546eaSitojun * (RFC 2461 7.3.3) 1874287546eaSitojun */ 1875287546eaSitojun if (ln->ln_state == ND6_LLINFO_STALE) { 1876287546eaSitojun ln->ln_asked = 0; 1877287546eaSitojun ln->ln_state = ND6_LLINFO_DELAY; 18789631a17bSitojun nd6_llinfo_settimer(ln, nd6_delay * hz); 1879287546eaSitojun } 1880287546eaSitojun 1881287546eaSitojun /* 1882287546eaSitojun * If the neighbor cache entry has a state other than INCOMPLETE 188334deef1eSitojun * (i.e. its link-layer address is already resolved), just 1884287546eaSitojun * send the packet. 1885287546eaSitojun */ 1886287546eaSitojun if (ln->ln_state > ND6_LLINFO_INCOMPLETE) 1887287546eaSitojun goto sendpkt; 1888287546eaSitojun 1889287546eaSitojun /* 1890287546eaSitojun * There is a neighbor cache entry, but no ethernet address 1891287546eaSitojun * response yet. Replace the held mbuf (if any) with this 1892287546eaSitojun * latest one. 1893287546eaSitojun */ 1894efcf292bSitojun if (ln->ln_state == ND6_LLINFO_NOSTATE) 1895287546eaSitojun ln->ln_state = ND6_LLINFO_INCOMPLETE; 1896287546eaSitojun if (ln->ln_hold) 1897287546eaSitojun m_freem(ln->ln_hold); 1898287546eaSitojun ln->ln_hold = m; 189976843262Sitojun /* 190076843262Sitojun * If there has been no NS for the neighbor after entering the 190176843262Sitojun * INCOMPLETE state, send the first solicitation. 190276843262Sitojun */ 19039631a17bSitojun if (!ND6_LLINFO_PERMANENT(ln) && ln->ln_asked == 0) { 1904287546eaSitojun ln->ln_asked++; 19059631a17bSitojun nd6_llinfo_settimer(ln, 19069631a17bSitojun (long)ND_IFINFO(ifp)->retrans * hz / 1000); 1907287546eaSitojun nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0); 1908287546eaSitojun } 1909287546eaSitojun return (0); 1910287546eaSitojun 1911287546eaSitojun sendpkt: 1912cb39d30aSangelos #ifdef IPSEC 1913cb39d30aSangelos /* 1914cb39d30aSangelos * If the packet needs outgoing IPsec crypto processing and the 1915cb39d30aSangelos * interface doesn't support it, drop it. 1916cb39d30aSangelos */ 1917cb39d30aSangelos mtag = m_tag_find(m, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL); 1918cb39d30aSangelos #endif /* IPSEC */ 19196afad192Sitojun 19200a2c5741Sitojun if ((ifp->if_flags & IFF_LOOPBACK) != 0) { 1921cb39d30aSangelos #ifdef IPSEC 1922cb39d30aSangelos if (mtag != NULL && 1923cb39d30aSangelos (origifp->if_capabilities & IFCAP_IPSEC) == 0) { 1924cb39d30aSangelos /* Tell IPsec to do its own crypto. */ 1925cb39d30aSangelos ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 1926cb39d30aSangelos error = EACCES; 1927cb39d30aSangelos goto bad; 1928cb39d30aSangelos } 1929cb39d30aSangelos #endif /* IPSEC */ 19306afad192Sitojun return ((*ifp->if_output)(origifp, m, (struct sockaddr *)dst, 19316afad192Sitojun rt)); 19326afad192Sitojun } 1933cb39d30aSangelos #ifdef IPSEC 1934cb39d30aSangelos if (mtag != NULL && 1935cb39d30aSangelos (ifp->if_capabilities & IFCAP_IPSEC) == 0) { 1936cb39d30aSangelos /* Tell IPsec to do its own crypto. */ 1937cb39d30aSangelos ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1)); 1938cb39d30aSangelos error = EACCES; 1939cb39d30aSangelos goto bad; 1940cb39d30aSangelos } 1941cb39d30aSangelos #endif /* IPSEC */ 1942287546eaSitojun return ((*ifp->if_output)(ifp, m, (struct sockaddr *)dst, rt)); 1943287546eaSitojun 1944287546eaSitojun bad: 1945287546eaSitojun if (m) 1946287546eaSitojun m_freem(m); 1947287546eaSitojun return (error); 1948287546eaSitojun } 1949287546eaSitojun #undef senderr 1950287546eaSitojun 1951287546eaSitojun int 1952ee37ea65Smcbride nd6_need_cache(struct ifnet *ifp) 1953d8a7e3a7Sitojun { 1954d8a7e3a7Sitojun /* 1955d8a7e3a7Sitojun * XXX: we currently do not make neighbor cache on any interface 195640765843Shenning * other than Ethernet, FDDI and GIF. 1957d8a7e3a7Sitojun * 1958d8a7e3a7Sitojun * RFC2893 says: 1959d8a7e3a7Sitojun * - unidirectional tunnels needs no ND 1960d8a7e3a7Sitojun */ 1961d8a7e3a7Sitojun switch (ifp->if_type) { 1962d8a7e3a7Sitojun case IFT_ETHER: 1963d8a7e3a7Sitojun case IFT_FDDI: 1964d8a7e3a7Sitojun case IFT_IEEE1394: 1965d8a7e3a7Sitojun case IFT_PROPVIRTUAL: 1966d8a7e3a7Sitojun case IFT_L2VLAN: 1967d8a7e3a7Sitojun case IFT_IEEE80211: 1968f4433d56Shenning case IFT_CARP: 1969d8a7e3a7Sitojun case IFT_GIF: /* XXX need more cases? */ 1970d8a7e3a7Sitojun return (1); 1971d8a7e3a7Sitojun default: 1972d8a7e3a7Sitojun return (0); 1973d8a7e3a7Sitojun } 1974d8a7e3a7Sitojun } 1975d8a7e3a7Sitojun 1976d8a7e3a7Sitojun int 1977ee37ea65Smcbride nd6_storelladdr(struct ifnet *ifp, struct rtentry *rt, struct mbuf *m, 1978ee37ea65Smcbride struct sockaddr *dst, u_char *desten) 1979287546eaSitojun { 1980287546eaSitojun struct sockaddr_dl *sdl; 1981287546eaSitojun 1982287546eaSitojun if (m->m_flags & M_MCAST) { 1983287546eaSitojun switch (ifp->if_type) { 1984287546eaSitojun case IFT_ETHER: 1985287546eaSitojun case IFT_FDDI: 1986287546eaSitojun ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr, 1987287546eaSitojun desten); 1988287546eaSitojun return (1); 1989287546eaSitojun break; 1990287546eaSitojun default: 19910a2c5741Sitojun m_freem(m); 1992287546eaSitojun return (0); 1993287546eaSitojun } 1994287546eaSitojun } 1995287546eaSitojun 199672e30262Sitojun if (rt == NULL) { 199772e30262Sitojun /* this could happen, if we could not allocate memory */ 19980a2c5741Sitojun m_freem(m); 199972e30262Sitojun return (0); 200072e30262Sitojun } 200172e30262Sitojun if (rt->rt_gateway->sa_family != AF_LINK) { 2002287546eaSitojun printf("nd6_storelladdr: something odd happens\n"); 20030a2c5741Sitojun m_freem(m); 2004287546eaSitojun return (0); 2005287546eaSitojun } 2006287546eaSitojun sdl = SDL(rt->rt_gateway); 2007b4ee66fcSitojun if (sdl->sdl_alen == 0) { 2008bd2806bcSitojun /* this should be impossible, but we bark here for debugging */ 2009d8a7e3a7Sitojun printf("nd6_storelladdr: sdl_alen == 0, dst=%s, if=%s\n", 2010d8a7e3a7Sitojun ip6_sprintf(&SIN6(dst)->sin6_addr), ifp->if_xname); 20110a2c5741Sitojun m_freem(m); 2012b4ee66fcSitojun return (0); 2013b4ee66fcSitojun } 2014287546eaSitojun 2015b4ee66fcSitojun bcopy(LLADDR(sdl), desten, sdl->sdl_alen); 2016287546eaSitojun return (1); 2017287546eaSitojun } 2018d8a7e3a7Sitojun 2019ee37ea65Smcbride /* 2020ee37ea65Smcbride * oldp - syscall arg, need copyout 2021ee37ea65Smcbride * newp - syscall arg, need copyin 2022ee37ea65Smcbride */ 2023ee37ea65Smcbride 2024d8a7e3a7Sitojun int 2025*a0aa363cSjsing nd6_sysctl(int name, void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2026d8a7e3a7Sitojun { 2027db3db419Sitojun void *p; 202834223ca4Schl size_t ol; 2029d8a7e3a7Sitojun int error; 2030d8a7e3a7Sitojun 2031d8a7e3a7Sitojun error = 0; 2032d8a7e3a7Sitojun 2033d8a7e3a7Sitojun if (newp) 2034d8a7e3a7Sitojun return EPERM; 2035d8a7e3a7Sitojun if (oldp && !oldlenp) 2036d8a7e3a7Sitojun return EINVAL; 2037d8a7e3a7Sitojun ol = oldlenp ? *oldlenp : 0; 2038d8a7e3a7Sitojun 2039db3db419Sitojun if (oldp) { 2040db3db419Sitojun p = malloc(*oldlenp, M_TEMP, M_WAITOK); 2041db3db419Sitojun if (!p) 2042db3db419Sitojun return ENOMEM; 2043db3db419Sitojun } else 2044db3db419Sitojun p = NULL; 2045d8a7e3a7Sitojun switch (name) { 2046d8a7e3a7Sitojun case ICMPV6CTL_ND6_DRLIST: 2047db3db419Sitojun error = fill_drlist(p, oldlenp, ol); 2048db3db419Sitojun if (!error && p && oldp) 2049732568ffSitojun error = copyout(p, oldp, *oldlenp); 2050d8a7e3a7Sitojun break; 2051d8a7e3a7Sitojun 2052d8a7e3a7Sitojun case ICMPV6CTL_ND6_PRLIST: 2053db3db419Sitojun error = fill_prlist(p, oldlenp, ol); 2054db3db419Sitojun if (!error && p && oldp) 2055732568ffSitojun error = copyout(p, oldp, *oldlenp); 2056d8a7e3a7Sitojun break; 2057d8a7e3a7Sitojun 2058d8a7e3a7Sitojun default: 2059d8a7e3a7Sitojun error = ENOPROTOOPT; 2060d8a7e3a7Sitojun break; 2061d8a7e3a7Sitojun } 2062db3db419Sitojun if (p) 2063db3db419Sitojun free(p, M_TEMP); 2064d8a7e3a7Sitojun 2065d8a7e3a7Sitojun return (error); 2066d8a7e3a7Sitojun } 2067d8a7e3a7Sitojun 2068*a0aa363cSjsing int 2069ee37ea65Smcbride fill_drlist(void *oldp, size_t *oldlenp, size_t ol) 2070d8a7e3a7Sitojun { 2071d8a7e3a7Sitojun int error = 0, s; 2072d8a7e3a7Sitojun struct in6_defrouter *d = NULL, *de = NULL; 2073d8a7e3a7Sitojun struct nd_defrouter *dr; 2074d8a7e3a7Sitojun size_t l; 2075d8a7e3a7Sitojun 20766e92dee6Sitojun s = splsoftnet(); 2077d8a7e3a7Sitojun 2078d8a7e3a7Sitojun if (oldp) { 2079d8a7e3a7Sitojun d = (struct in6_defrouter *)oldp; 2080d8a7e3a7Sitojun de = (struct in6_defrouter *)((caddr_t)oldp + *oldlenp); 2081d8a7e3a7Sitojun } 2082d8a7e3a7Sitojun l = 0; 2083d8a7e3a7Sitojun 2084d8a7e3a7Sitojun for (dr = TAILQ_FIRST(&nd_defrouter); dr; 2085d8a7e3a7Sitojun dr = TAILQ_NEXT(dr, dr_entry)) { 2086d8a7e3a7Sitojun 2087d8a7e3a7Sitojun if (oldp && d + 1 <= de) { 2088d8a7e3a7Sitojun bzero(d, sizeof(*d)); 2089d8a7e3a7Sitojun d->rtaddr.sin6_family = AF_INET6; 2090d8a7e3a7Sitojun d->rtaddr.sin6_len = sizeof(struct sockaddr_in6); 2091d8a7e3a7Sitojun d->rtaddr.sin6_addr = dr->rtaddr; 2092d8a7e3a7Sitojun in6_recoverscope(&d->rtaddr, &d->rtaddr.sin6_addr, 2093d8a7e3a7Sitojun dr->ifp); 2094d8a7e3a7Sitojun d->flags = dr->flags; 2095d8a7e3a7Sitojun d->rtlifetime = dr->rtlifetime; 2096d8a7e3a7Sitojun d->expire = dr->expire; 2097d8a7e3a7Sitojun d->if_index = dr->ifp->if_index; 2098d8a7e3a7Sitojun } 2099d8a7e3a7Sitojun 2100d8a7e3a7Sitojun l += sizeof(*d); 2101d8a7e3a7Sitojun if (d) 2102d8a7e3a7Sitojun d++; 2103d8a7e3a7Sitojun } 2104d8a7e3a7Sitojun 2105d8a7e3a7Sitojun if (oldp) { 2106d8a7e3a7Sitojun *oldlenp = l; /* (caddr_t)d - (caddr_t)oldp */ 2107d8a7e3a7Sitojun if (l > ol) 2108d8a7e3a7Sitojun error = ENOMEM; 2109d8a7e3a7Sitojun } else 2110d8a7e3a7Sitojun *oldlenp = l; 2111d8a7e3a7Sitojun 2112d8a7e3a7Sitojun splx(s); 2113d8a7e3a7Sitojun 2114d8a7e3a7Sitojun return (error); 2115d8a7e3a7Sitojun } 2116d8a7e3a7Sitojun 2117*a0aa363cSjsing int 2118ee37ea65Smcbride fill_prlist(void *oldp, size_t *oldlenp, size_t ol) 2119d8a7e3a7Sitojun { 2120d8a7e3a7Sitojun int error = 0, s; 2121d8a7e3a7Sitojun struct nd_prefix *pr; 2122d8a7e3a7Sitojun struct in6_prefix *p = NULL; 2123d8a7e3a7Sitojun struct in6_prefix *pe = NULL; 2124d8a7e3a7Sitojun size_t l; 2125d8a7e3a7Sitojun 21266e92dee6Sitojun s = splsoftnet(); 2127d8a7e3a7Sitojun 2128d8a7e3a7Sitojun if (oldp) { 2129d8a7e3a7Sitojun p = (struct in6_prefix *)oldp; 2130d8a7e3a7Sitojun pe = (struct in6_prefix *)((caddr_t)oldp + *oldlenp); 2131d8a7e3a7Sitojun } 2132d8a7e3a7Sitojun l = 0; 2133d8a7e3a7Sitojun 2134545205eaSpyr LIST_FOREACH(pr, &nd_prefix, ndpr_entry) { 2135d8a7e3a7Sitojun u_short advrtrs; 2136d8a7e3a7Sitojun size_t advance; 2137d8a7e3a7Sitojun struct sockaddr_in6 *sin6; 2138d8a7e3a7Sitojun struct sockaddr_in6 *s6; 2139d8a7e3a7Sitojun struct nd_pfxrouter *pfr; 2140d8a7e3a7Sitojun 2141d8a7e3a7Sitojun if (oldp && p + 1 <= pe) 2142d8a7e3a7Sitojun { 2143d8a7e3a7Sitojun bzero(p, sizeof(*p)); 2144d8a7e3a7Sitojun sin6 = (struct sockaddr_in6 *)(p + 1); 2145d8a7e3a7Sitojun 2146d8a7e3a7Sitojun p->prefix = pr->ndpr_prefix; 2147d8a7e3a7Sitojun if (in6_recoverscope(&p->prefix, 2148d8a7e3a7Sitojun &p->prefix.sin6_addr, pr->ndpr_ifp) != 0) 2149d8a7e3a7Sitojun log(LOG_ERR, 2150d8a7e3a7Sitojun "scope error in prefix list (%s)\n", 2151d8a7e3a7Sitojun ip6_sprintf(&p->prefix.sin6_addr)); 2152d8a7e3a7Sitojun p->raflags = pr->ndpr_raf; 2153d8a7e3a7Sitojun p->prefixlen = pr->ndpr_plen; 2154d8a7e3a7Sitojun p->vltime = pr->ndpr_vltime; 2155d8a7e3a7Sitojun p->pltime = pr->ndpr_pltime; 2156d8a7e3a7Sitojun p->if_index = pr->ndpr_ifp->if_index; 2157d8a7e3a7Sitojun if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME) 2158d8a7e3a7Sitojun p->expire = 0; 2159d8a7e3a7Sitojun else { 2160d8a7e3a7Sitojun time_t maxexpire; 2161d8a7e3a7Sitojun 2162d8a7e3a7Sitojun /* XXX: we assume time_t is signed. */ 2163d8a7e3a7Sitojun maxexpire = (-1) & 2164d8a7e3a7Sitojun ~(1 << ((sizeof(maxexpire) * 8) - 1)); 2165d8a7e3a7Sitojun if (pr->ndpr_vltime < 2166d8a7e3a7Sitojun maxexpire - pr->ndpr_lastupdate) { 2167d8a7e3a7Sitojun p->expire = pr->ndpr_lastupdate + 2168d8a7e3a7Sitojun pr->ndpr_vltime; 2169d8a7e3a7Sitojun } else 2170d8a7e3a7Sitojun p->expire = maxexpire; 2171d8a7e3a7Sitojun } 2172d8a7e3a7Sitojun p->refcnt = pr->ndpr_refcnt; 2173d8a7e3a7Sitojun p->flags = pr->ndpr_stateflags; 2174d8a7e3a7Sitojun p->origin = PR_ORIG_RA; 2175d8a7e3a7Sitojun advrtrs = 0; 2176545205eaSpyr LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) { 2177d8a7e3a7Sitojun if ((void *)&sin6[advrtrs + 1] > (void *)pe) { 2178d8a7e3a7Sitojun advrtrs++; 2179d8a7e3a7Sitojun continue; 2180d8a7e3a7Sitojun } 2181d8a7e3a7Sitojun s6 = &sin6[advrtrs]; 2182d8a7e3a7Sitojun s6->sin6_family = AF_INET6; 2183d8a7e3a7Sitojun s6->sin6_len = sizeof(struct sockaddr_in6); 2184d8a7e3a7Sitojun s6->sin6_addr = pfr->router->rtaddr; 2185d8a7e3a7Sitojun in6_recoverscope(s6, &pfr->router->rtaddr, 2186d8a7e3a7Sitojun pfr->router->ifp); 2187d8a7e3a7Sitojun advrtrs++; 2188d8a7e3a7Sitojun } 2189d8a7e3a7Sitojun p->advrtrs = advrtrs; 2190d8a7e3a7Sitojun } 2191d8a7e3a7Sitojun else { 2192d8a7e3a7Sitojun advrtrs = 0; 2193545205eaSpyr LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) 2194d8a7e3a7Sitojun advrtrs++; 2195d8a7e3a7Sitojun } 2196d8a7e3a7Sitojun 2197d8a7e3a7Sitojun advance = sizeof(*p) + sizeof(*sin6) * advrtrs; 2198d8a7e3a7Sitojun l += advance; 2199d8a7e3a7Sitojun if (p) 2200d8a7e3a7Sitojun p = (struct in6_prefix *)((caddr_t)p + advance); 2201d8a7e3a7Sitojun } 2202d8a7e3a7Sitojun 2203d8a7e3a7Sitojun if (oldp) { 2204d8a7e3a7Sitojun *oldlenp = l; /* (caddr_t)d - (caddr_t)oldp */ 2205d8a7e3a7Sitojun if (l > ol) 2206d8a7e3a7Sitojun error = ENOMEM; 2207d8a7e3a7Sitojun } else 2208d8a7e3a7Sitojun *oldlenp = l; 2209d8a7e3a7Sitojun 2210d8a7e3a7Sitojun splx(s); 2211d8a7e3a7Sitojun 2212d8a7e3a7Sitojun return (error); 2213d8a7e3a7Sitojun } 2214