2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
38 #include "opt_inet6.h"
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/eventhandler.h>
43 #include <sys/callout.h>
45 #include <sys/malloc.h>
47 #include <sys/mutex.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
51 #include <sys/kernel.h>
52 #include <sys/protosw.h>
53 #include <sys/errno.h>
54 #include <sys/syslog.h>
55 #include <sys/rwlock.h>
56 #include <sys/queue.h>
58 #include <sys/sysctl.h>
61 #include <net/if_var.h>
62 #include <net/if_dl.h>
63 #include <net/if_types.h>
64 #include <net/route.h>
67 #include <netinet/in.h>
68 #include <netinet/in_kdtrace.h>
69 #include <net/if_llatbl.h>
70 #include <netinet/if_ether.h>
71 #include <netinet6/in6_var.h>
72 #include <netinet/ip6.h>
73 #include <netinet6/ip6_var.h>
74 #include <netinet6/scope6_var.h>
75 #include <netinet6/nd6.h>
76 #include <netinet6/in6_ifattach.h>
77 #include <netinet/icmp6.h>
78 #include <netinet6/send.h>
80 #include <sys/limits.h>
82 #include <security/mac/mac_framework.h>
84 #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */
85 #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */
87 #define SIN6(s) ((const struct sockaddr_in6 *)(s))
89 MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
92 VNET_DEFINE(int, nd6_prune) = 1; /* walk list every 1 seconds */
93 VNET_DEFINE(int, nd6_delay) = 5; /* delay first probe time 5 second */
94 VNET_DEFINE(int, nd6_umaxtries) = 3; /* maximum unicast query */
95 VNET_DEFINE(int, nd6_mmaxtries) = 3; /* maximum multicast query */
96 VNET_DEFINE(int, nd6_useloopback) = 1; /* use loopback interface for
98 VNET_DEFINE(int, nd6_gctimer) = (60 * 60 * 24); /* 1 day: garbage
101 /* preventing too many loops in ND option parsing */
102 VNET_DEFINE_STATIC(int, nd6_maxndopt) = 10; /* max # of ND options allowed */
104 VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper
106 VNET_DEFINE_STATIC(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
108 #define V_nd6_maxndopt VNET(nd6_maxndopt)
109 #define V_nd6_maxqueuelen VNET(nd6_maxqueuelen)
112 VNET_DEFINE(int, nd6_debug) = 1;
114 VNET_DEFINE(int, nd6_debug) = 0;
117 static eventhandler_tag lle_event_eh, iflladdr_event_eh, ifnet_link_event_eh;
119 VNET_DEFINE(struct nd_prhead, nd_prefix);
120 VNET_DEFINE(struct rwlock, nd6_lock);
121 VNET_DEFINE(uint64_t, nd6_list_genid);
122 VNET_DEFINE(struct mtx, nd6_onlink_mtx);
124 VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL;
125 #define V_nd6_recalc_reachtm_interval VNET(nd6_recalc_reachtm_interval)
127 int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
129 static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *,
131 static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *);
132 static void nd6_slowtimo(void *);
133 static int regen_tmpaddr(struct in6_ifaddr *);
134 static void nd6_free(struct llentry **, int);
135 static void nd6_free_redirect(const struct llentry *);
136 static void nd6_llinfo_timer(void *);
137 static void nd6_llinfo_settimer_locked(struct llentry *, long);
138 static void clear_llinfo_pqueue(struct llentry *);
139 static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
140 static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *,
141 const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **);
142 static int nd6_need_cache(struct ifnet *);
145 VNET_DEFINE_STATIC(struct callout, nd6_slowtimo_ch);
146 #define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch)
148 VNET_DEFINE_STATIC(struct callout, nd6_timer_ch);
149 #define V_nd6_timer_ch VNET(nd6_timer_ch)
151 SYSCTL_DECL(_net_inet6_icmp6);
154 nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
156 struct rt_addrinfo rtinfo;
157 struct sockaddr_in6 dst;
158 struct sockaddr_dl gw;
163 LLE_WLOCK_ASSERT(lle);
165 if (lltable_get_af(lle->lle_tbl) != AF_INET6)
169 case LLENTRY_RESOLVED:
171 KASSERT(lle->la_flags & LLE_VALID,
172 ("%s: %p resolved but not valid?", __func__, lle));
174 case LLENTRY_EXPIRED:
181 ifp = lltable_get_ifp(lle->lle_tbl);
183 bzero(&dst, sizeof(dst));
184 bzero(&gw, sizeof(gw));
185 bzero(&rtinfo, sizeof(rtinfo));
186 lltable_fill_sa_entry(lle, (struct sockaddr *)&dst);
187 dst.sin6_scope_id = in6_getscopezone(ifp,
188 in6_addrscope(&dst.sin6_addr));
189 gw.sdl_len = sizeof(struct sockaddr_dl);
190 gw.sdl_family = AF_LINK;
191 gw.sdl_alen = ifp->if_addrlen;
192 gw.sdl_index = ifp->if_index;
193 gw.sdl_type = ifp->if_type;
194 if (evt == LLENTRY_RESOLVED)
195 bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen);
196 rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst;
197 rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw;
198 rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY;
199 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ifp->if_fib;
200 rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | (
201 type == RTM_ADD ? RTF_UP: 0), 0, fibnum);
205 * A handler for interface link layer address change event.
208 nd6_iflladdr(void *arg __unused, struct ifnet *ifp)
211 lltable_update_ifaddr(LLTABLE6(ifp));
218 mtx_init(&V_nd6_onlink_mtx, "nd6 onlink", NULL, MTX_DEF);
219 rw_init(&V_nd6_lock, "nd6 list");
221 LIST_INIT(&V_nd_prefix);
222 nd6_defrouter_init();
225 callout_init(&V_nd6_slowtimo_ch, 0);
226 callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
227 nd6_slowtimo, curvnet);
229 callout_init(&V_nd6_timer_ch, 0);
230 callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet);
233 if (IS_DEFAULT_VNET(curvnet)) {
234 lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
235 NULL, EVENTHANDLER_PRI_ANY);
236 iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event,
237 nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
238 ifnet_link_event_eh = EVENTHANDLER_REGISTER(ifnet_link_event,
239 nd6_ifnet_link_event, NULL, EVENTHANDLER_PRI_ANY);
248 callout_drain(&V_nd6_slowtimo_ch);
249 callout_drain(&V_nd6_timer_ch);
250 if (IS_DEFAULT_VNET(curvnet)) {
251 EVENTHANDLER_DEREGISTER(ifnet_link_event, ifnet_link_event_eh);
252 EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
253 EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh);
255 rw_destroy(&V_nd6_lock);
256 mtx_destroy(&V_nd6_onlink_mtx);
261 nd6_ifattach(struct ifnet *ifp)
263 struct nd_ifinfo *nd;
265 nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO);
268 nd->chlim = IPV6_DEFHLIM;
269 nd->basereachable = REACHABLE_TIME;
270 nd->reachable = ND_COMPUTE_RTIME(nd->basereachable);
271 nd->retrans = RETRANS_TIMER;
273 nd->flags = ND6_IFF_PERFORMNUD;
275 /* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL.
276 * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by
277 * default regardless of the V_ip6_auto_linklocal configuration to
278 * give a reasonable default behavior.
280 if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) ||
281 (ifp->if_flags & IFF_LOOPBACK))
282 nd->flags |= ND6_IFF_AUTO_LINKLOCAL;
284 * A loopback interface does not need to accept RTADV.
285 * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by
286 * default regardless of the V_ip6_accept_rtadv configuration to
287 * prevent the interface from accepting RA messages arrived
288 * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV.
290 if (V_ip6_accept_rtadv &&
291 !(ifp->if_flags & IFF_LOOPBACK) &&
292 (ifp->if_type != IFT_BRIDGE))
293 nd->flags |= ND6_IFF_ACCEPT_RTADV;
294 if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK))
295 nd->flags |= ND6_IFF_NO_RADR;
297 /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */
298 nd6_setmtu0(ifp, nd);
304 nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd)
306 struct epoch_tracker et;
307 struct ifaddr *ifa, *next;
310 CK_STAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
311 if (ifa->ifa_addr->sa_family != AF_INET6)
314 /* stop DAD processing */
323 * Reset ND level link MTU. This function is called when the physical MTU
324 * changes, which means we might have to adjust the ND level MTU.
327 nd6_setmtu(struct ifnet *ifp)
329 if (ifp->if_afdata[AF_INET6] == NULL)
332 nd6_setmtu0(ifp, ND_IFINFO(ifp));
335 /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */
337 nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi)
341 omaxmtu = ndi->maxmtu;
342 ndi->maxmtu = ifp->if_mtu;
345 * Decreasing the interface MTU under IPV6 minimum MTU may cause
346 * undesirable situation. We thus notify the operator of the change
347 * explicitly. The check for omaxmtu is necessary to restrict the
348 * log to the case of changing the MTU, not initializing it.
350 if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) {
351 log(LOG_NOTICE, "nd6_setmtu0: "
352 "new link MTU on %s (%lu) is too small for IPv6\n",
353 if_name(ifp), (unsigned long)ndi->maxmtu);
356 if (ndi->maxmtu > V_in6_maxmtu)
357 in6_setmaxmtu(); /* check all interfaces just in case */
362 nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts)
365 bzero(ndopts, sizeof(*ndopts));
366 ndopts->nd_opts_search = (struct nd_opt_hdr *)opt;
368 = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len);
371 ndopts->nd_opts_done = 1;
372 ndopts->nd_opts_search = NULL;
377 * Take one ND option.
380 nd6_option(union nd_opts *ndopts)
382 struct nd_opt_hdr *nd_opt;
385 KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
386 KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
388 if (ndopts->nd_opts_search == NULL)
390 if (ndopts->nd_opts_done)
393 nd_opt = ndopts->nd_opts_search;
395 /* make sure nd_opt_len is inside the buffer */
396 if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
397 bzero(ndopts, sizeof(*ndopts));
401 olen = nd_opt->nd_opt_len << 3;
404 * Message validation requires that all included
405 * options have a length that is greater than zero.
407 bzero(ndopts, sizeof(*ndopts));
411 ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
412 if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
413 /* option overruns the end of buffer, invalid */
414 bzero(ndopts, sizeof(*ndopts));
416 } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
417 /* reached the end of options chain */
418 ndopts->nd_opts_done = 1;
419 ndopts->nd_opts_search = NULL;
425 * Parse multiple ND options.
426 * This function is much easier to use, for ND routines that do not need
427 * multiple options of the same type.
430 nd6_options(union nd_opts *ndopts)
432 struct nd_opt_hdr *nd_opt;
435 KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
436 KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
438 if (ndopts->nd_opts_search == NULL)
442 nd_opt = nd6_option(ndopts);
443 if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
445 * Message validation requires that all included
446 * options have a length that is greater than zero.
448 ICMP6STAT_INC(icp6s_nd_badopt);
449 bzero(ndopts, sizeof(*ndopts));
456 switch (nd_opt->nd_opt_type) {
457 case ND_OPT_SOURCE_LINKADDR:
458 case ND_OPT_TARGET_LINKADDR:
460 case ND_OPT_REDIRECTED_HEADER:
462 if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
464 "duplicated ND6 option found (type=%d)\n",
465 nd_opt->nd_opt_type));
468 ndopts->nd_opt_array[nd_opt->nd_opt_type]
472 case ND_OPT_PREFIX_INFORMATION:
473 if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) {
474 ndopts->nd_opt_array[nd_opt->nd_opt_type]
477 ndopts->nd_opts_pi_end =
478 (struct nd_opt_prefix_info *)nd_opt;
480 /* What about ND_OPT_ROUTE_INFO? RFC 4191 */
481 case ND_OPT_RDNSS: /* RFC 6106 */
482 case ND_OPT_DNSSL: /* RFC 6106 */
484 * Silently ignore options we know and do not care about
490 * Unknown options must be silently ignored,
491 * to accommodate future extension to the protocol.
494 "nd6_options: unsupported option %d - "
495 "option ignored\n", nd_opt->nd_opt_type));
500 if (i > V_nd6_maxndopt) {
501 ICMP6STAT_INC(icp6s_nd_toomanyopt);
502 nd6log((LOG_INFO, "too many loop in nd opt\n"));
506 if (ndopts->nd_opts_done)
514 * ND6 timer routine to handle ND6 entries
517 nd6_llinfo_settimer_locked(struct llentry *ln, long tick)
521 LLE_WLOCK_ASSERT(ln);
526 canceled = callout_stop(&ln->lle_timer);
528 ln->la_expire = time_uptime + tick / hz;
530 if (tick > INT_MAX) {
531 ln->ln_ntick = tick - INT_MAX;
532 canceled = callout_reset(&ln->lle_timer, INT_MAX,
533 nd6_llinfo_timer, ln);
536 canceled = callout_reset(&ln->lle_timer, tick,
537 nd6_llinfo_timer, ln);
545 * Gets source address of the first packet in hold queue
546 * and stores it in @src.
547 * Returns pointer to @src (if hold queue is not empty) or NULL.
549 * Set noinline to be dtrace-friendly
551 static __noinline struct in6_addr *
552 nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src)
557 if (ln->la_hold == NULL)
561 * assume every packet in la_hold has the same IP header
564 if (sizeof(hdr) > m->m_len)
567 m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
574 * Checks if we need to switch from STALE state.
576 * RFC 4861 requires switching from STALE to DELAY state
577 * on first packet matching entry, waiting V_nd6_delay and
578 * transition to PROBE state (if upper layer confirmation was
581 * This code performs a bit differently:
582 * On packet hit we don't change state (but desired state
583 * can be guessed by control plane). However, after V_nd6_delay
584 * seconds code will transition to PROBE state (so DELAY state
585 * is kinda skipped in most situations).
587 * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so
588 * we perform the following upon entering STALE state:
590 * 1) Arm timer to run each V_nd6_delay seconds to make sure that
591 * if packet was transmitted at the start of given interval, we
592 * would be able to switch to PROBE state in V_nd6_delay seconds
595 * 2) Reschedule timer until original V_nd6_gctimer expires keeping
596 * lle in STALE state (remaining timer value stored in lle_remtime).
598 * 3) Reschedule timer if packet was transmitted less that V_nd6_delay
601 * Returns non-zero value if the entry is still STALE (storing
602 * the next timer interval in @pdelay).
604 * Returns zero value if original timer expired or we need to switch to
605 * PROBE (store that in @do_switch variable).
608 nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch)
610 int nd_delay, nd_gctimer, r_skip_req;
615 nd_gctimer = V_nd6_gctimer;
616 nd_delay = V_nd6_delay;
619 r_skip_req = lle->r_skip_req;
620 lle_hittime = lle->lle_hittime;
623 if (r_skip_req > 0) {
626 * Nonzero r_skip_req value was set upon entering
627 * STALE state. Since value was not changed, no
628 * packets were passed using this lle. Ask for
629 * timer reschedule and keep STALE state.
631 delay = (long)(MIN(nd_gctimer, nd_delay));
633 if (lle->lle_remtime > delay)
634 lle->lle_remtime -= delay;
636 delay = lle->lle_remtime;
637 lle->lle_remtime = 0;
643 * The original ng6_gctime timeout ended,
644 * no more rescheduling.
654 * Packet received. Verify timestamp
656 delay = (long)(time_uptime - lle_hittime);
657 if (delay < nd_delay) {
660 * V_nd6_delay still not passed since the first
661 * hit in STALE state.
662 * Reshedule timer and return.
664 *pdelay = (long)(nd_delay - delay) * hz;
668 /* Request switching to probe */
675 * Switch @lle state to new state optionally arming timers.
677 * Set noinline to be dtrace-friendly
680 nd6_llinfo_setstate(struct llentry *lle, int newstate)
683 int nd_gctimer, nd_delay;
690 case ND6_LLINFO_INCOMPLETE:
691 ifp = lle->lle_tbl->llt_ifp;
692 delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000;
694 case ND6_LLINFO_REACHABLE:
695 if (!ND6_LLINFO_PERMANENT(lle)) {
696 ifp = lle->lle_tbl->llt_ifp;
697 delay = (long)ND_IFINFO(ifp)->reachable * hz;
700 case ND6_LLINFO_STALE:
703 * Notify fast path that we want to know if any packet
704 * is transmitted by setting r_skip_req.
709 nd_delay = V_nd6_delay;
710 nd_gctimer = V_nd6_gctimer;
712 delay = (long)(MIN(nd_gctimer, nd_delay)) * hz;
713 remtime = (long)nd_gctimer * hz - delay;
715 case ND6_LLINFO_DELAY:
717 delay = (long)V_nd6_delay * hz;
722 nd6_llinfo_settimer_locked(lle, delay);
724 lle->lle_remtime = remtime;
725 lle->ln_state = newstate;
729 * Timer-dependent part of nd state machine.
731 * Set noinline to be dtrace-friendly
733 static __noinline void
734 nd6_llinfo_timer(void *arg)
736 struct epoch_tracker et;
738 struct in6_addr *dst, *pdst, *psrc, src;
740 struct nd_ifinfo *ndi;
741 int do_switch, send_ns;
744 KASSERT(arg != NULL, ("%s: arg NULL", __func__));
745 ln = (struct llentry *)arg;
746 ifp = lltable_get_ifp(ln->lle_tbl);
747 CURVNET_SET(ifp->if_vnet);
751 if (callout_pending(&ln->lle_timer)) {
753 * Here we are a bit odd here in the treatment of
754 * active/pending. If the pending bit is set, it got
755 * rescheduled before I ran. The active
756 * bit we ignore, since if it was stopped
757 * in ll_tablefree() and was currently running
758 * it would have return 0 so the code would
759 * not have deleted it since the callout could
760 * not be stopped so we want to go through
761 * with the delete here now. If the callout
762 * was restarted, the pending bit will be back on and
763 * we just want to bail since the callout_reset would
764 * return 1 and our reference would have been removed
765 * by nd6_llinfo_settimer_locked above since canceled
774 ndi = ND_IFINFO(ifp);
776 dst = &ln->r_l3addr.addr6;
779 if (ln->ln_ntick > 0) {
780 if (ln->ln_ntick > INT_MAX) {
781 ln->ln_ntick -= INT_MAX;
782 nd6_llinfo_settimer_locked(ln, INT_MAX);
785 nd6_llinfo_settimer_locked(ln, ln->ln_ntick);
790 if (ln->la_flags & LLE_STATIC) {
794 if (ln->la_flags & LLE_DELETED) {
799 switch (ln->ln_state) {
800 case ND6_LLINFO_INCOMPLETE:
801 if (ln->la_asked < V_nd6_mmaxtries) {
804 /* Send NS to multicast address */
807 struct mbuf *m = ln->la_hold;
812 * assuming every packet in la_hold has the
813 * same IP header. Send error after unlock.
818 clear_llinfo_pqueue(ln);
822 icmp6_error2(m, ICMP6_DST_UNREACH,
823 ICMP6_DST_UNREACH_ADDR, 0, ifp);
826 case ND6_LLINFO_REACHABLE:
827 if (!ND6_LLINFO_PERMANENT(ln))
828 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
831 case ND6_LLINFO_STALE:
832 if (nd6_is_stale(ln, &delay, &do_switch) != 0) {
835 * No packet has used this entry and GC timeout
836 * has not been passed. Reshedule timer and
839 nd6_llinfo_settimer_locked(ln, delay);
843 if (do_switch == 0) {
846 * GC timer has ended and entry hasn't been used.
847 * Run Garbage collector (RFC 4861, 5.3)
849 if (!ND6_LLINFO_PERMANENT(ln))
854 /* Entry has been used AND delay timer has ended. */
858 case ND6_LLINFO_DELAY:
859 if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
862 nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE);
865 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */
867 case ND6_LLINFO_PROBE:
868 if (ln->la_asked < V_nd6_umaxtries) {
876 panic("%s: paths in a dark night can be confusing: %d",
877 __func__, ln->ln_state);
883 nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
884 psrc = nd6_llinfo_get_holdsrc(ln, &src);
887 nd6_ns_output(ifp, psrc, pdst, dst, NULL);
898 * ND6 timer routine to expire default route list and prefix list
903 CURVNET_SET((struct vnet *) arg);
904 struct epoch_tracker et;
905 struct nd_prhead prl;
906 struct nd_prefix *pr, *npr;
908 struct in6_ifaddr *ia6, *nia6;
914 nd6_defrouter_timer();
917 * expire interface addresses.
918 * in the past the loop was inside prefix expiry processing.
919 * However, from a stricter speci-confrmance standpoint, we should
920 * rather separate address lifetimes and prefix lifetimes.
922 * XXXRW: in6_ifaddrhead locking.
925 CK_STAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) {
926 /* check address lifetime */
927 if (IFA6_IS_INVALID(ia6)) {
931 * If the expiring address is temporary, try
932 * regenerating a new one. This would be useful when
933 * we suspended a laptop PC, then turned it on after a
934 * period that could invalidate all temporary
935 * addresses. Although we may have to restart the
936 * loop (see below), it must be after purging the
937 * address. Otherwise, we'd see an infinite loop of
940 if (V_ip6_use_tempaddr &&
941 (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
942 if (regen_tmpaddr(ia6) == 0)
946 in6_purgeaddr(&ia6->ia_ifa);
949 goto addrloop; /* XXX: see below */
950 } else if (IFA6_IS_DEPRECATED(ia6)) {
951 int oldflags = ia6->ia6_flags;
953 ia6->ia6_flags |= IN6_IFF_DEPRECATED;
956 * If a temporary address has just become deprecated,
957 * regenerate a new one if possible.
959 if (V_ip6_use_tempaddr &&
960 (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
961 (oldflags & IN6_IFF_DEPRECATED) == 0) {
963 if (regen_tmpaddr(ia6) == 0) {
965 * A new temporary address is
967 * XXX: this means the address chain
968 * has changed while we are still in
969 * the loop. Although the change
970 * would not cause disaster (because
971 * it's not a deletion, but an
972 * addition,) we'd rather restart the
973 * loop just for safety. Or does this
974 * significantly reduce performance??
979 } else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) {
981 * Schedule DAD for a tentative address. This happens
982 * if the interface was down or not running
983 * when the address was configured.
987 delay = arc4random() %
988 (MAX_RTR_SOLICITATION_DELAY * hz);
989 nd6_dad_start((struct ifaddr *)ia6, delay);
992 * Check status of the interface. If it is down,
993 * mark the address as tentative for future DAD.
996 if ((ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0 &&
997 ((ifp->if_flags & IFF_UP) == 0 ||
998 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
999 (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) != 0)){
1000 ia6->ia6_flags &= ~IN6_IFF_DUPLICATED;
1001 ia6->ia6_flags |= IN6_IFF_TENTATIVE;
1005 * A new RA might have made a deprecated address
1008 ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
1015 LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1017 * Expire prefixes. Since the pltime is only used for
1018 * autoconfigured addresses, pltime processing for prefixes is
1021 * Only unlink after all derived addresses have expired. This
1022 * may not occur until two hours after the prefix has expired
1023 * per RFC 4862. If the prefix expires before its derived
1024 * addresses, mark it off-link. This will be done automatically
1025 * after unlinking if no address references remain.
1027 if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME ||
1028 time_uptime - pr->ndpr_lastupdate <= pr->ndpr_vltime)
1031 if (pr->ndpr_addrcnt == 0) {
1032 nd6_prefix_unlink(pr, &prl);
1035 if ((pr->ndpr_stateflags & NDPRF_ONLINK) != 0) {
1036 genid = V_nd6_list_genid;
1040 (void)nd6_prefix_offlink(pr);
1041 ND6_ONLINK_UNLOCK();
1043 nd6_prefix_rele(pr);
1044 if (genid != V_nd6_list_genid)
1050 while ((pr = LIST_FIRST(&prl)) != NULL) {
1051 LIST_REMOVE(pr, ndpr_entry);
1055 callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz,
1056 nd6_timer, curvnet);
1062 * ia6 - deprecated/invalidated temporary address
1065 regen_tmpaddr(struct in6_ifaddr *ia6)
1069 struct in6_ifaddr *public_ifa6 = NULL;
1073 ifp = ia6->ia_ifa.ifa_ifp;
1074 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1075 struct in6_ifaddr *it6;
1077 if (ifa->ifa_addr->sa_family != AF_INET6)
1080 it6 = (struct in6_ifaddr *)ifa;
1082 /* ignore no autoconf addresses. */
1083 if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
1086 /* ignore autoconf addresses with different prefixes. */
1087 if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
1091 * Now we are looking at an autoconf address with the same
1092 * prefix as ours. If the address is temporary and is still
1093 * preferred, do not create another one. It would be rare, but
1094 * could happen, for example, when we resume a laptop PC after
1097 if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
1098 !IFA6_IS_DEPRECATED(it6)) {
1104 * This is a public autoconf address that has the same prefix
1105 * as ours. If it is preferred, keep it. We can't break the
1106 * loop here, because there may be a still-preferred temporary
1107 * address with the prefix.
1109 if (!IFA6_IS_DEPRECATED(it6))
1112 if (public_ifa6 != NULL)
1113 ifa_ref(&public_ifa6->ia_ifa);
1115 if (public_ifa6 != NULL) {
1118 if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
1119 ifa_free(&public_ifa6->ia_ifa);
1120 log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
1121 " tmp addr,errno=%d\n", e);
1124 ifa_free(&public_ifa6->ia_ifa);
1132 * Remove prefix and default router list entries corresponding to ifp. Neighbor
1133 * cache entries are freed in in6_domifdetach().
1136 nd6_purge(struct ifnet *ifp)
1138 struct nd_prhead prl;
1139 struct nd_prefix *pr, *npr;
1143 /* Purge default router list entries toward ifp. */
1144 nd6_defrouter_purge(ifp);
1148 * Remove prefixes on ifp. We should have already removed addresses on
1149 * this interface, so no addresses should be referencing these prefixes.
1151 LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1152 if (pr->ndpr_ifp == ifp)
1153 nd6_prefix_unlink(pr, &prl);
1157 /* Delete the unlinked prefix objects. */
1158 while ((pr = LIST_FIRST(&prl)) != NULL) {
1159 LIST_REMOVE(pr, ndpr_entry);
1163 /* cancel default outgoing interface setting */
1164 if (V_nd6_defifindex == ifp->if_index)
1165 nd6_setdefaultiface(0);
1167 if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1168 /* Refresh default router list. */
1169 defrouter_select_fib(ifp->if_fib);
1174 * the caller acquires and releases the lock on the lltbls
1175 * Returns the llentry locked
1178 nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1180 struct sockaddr_in6 sin6;
1183 bzero(&sin6, sizeof(sin6));
1184 sin6.sin6_len = sizeof(struct sockaddr_in6);
1185 sin6.sin6_family = AF_INET6;
1186 sin6.sin6_addr = *addr6;
1188 IF_AFDATA_LOCK_ASSERT(ifp);
1190 ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6);
1195 static struct llentry *
1196 nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1198 struct sockaddr_in6 sin6;
1201 bzero(&sin6, sizeof(sin6));
1202 sin6.sin6_len = sizeof(struct sockaddr_in6);
1203 sin6.sin6_family = AF_INET6;
1204 sin6.sin6_addr = *addr6;
1206 ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6);
1208 ln->ln_state = ND6_LLINFO_NOSTATE;
1214 * Test whether a given IPv6 address is a neighbor or not, ignoring
1215 * the actual neighbor cache. The neighbor cache is ignored in order
1216 * to not reenter the routing code from within itself.
1219 nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
1221 struct nd_prefix *pr;
1223 struct rt_addrinfo info;
1224 struct sockaddr_in6 rt_key;
1225 const struct sockaddr *dst6;
1230 * A link-local address is always a neighbor.
1231 * XXX: a link does not necessarily specify a single interface.
1233 if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
1234 struct sockaddr_in6 sin6_copy;
1238 * We need sin6_copy since sa6_recoverscope() may modify the
1242 if (sa6_recoverscope(&sin6_copy))
1243 return (0); /* XXX: should be impossible */
1244 if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
1246 if (sin6_copy.sin6_scope_id == zone)
1252 bzero(&rt_key, sizeof(rt_key));
1253 bzero(&info, sizeof(info));
1254 info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key;
1257 * If the address matches one of our addresses,
1258 * it should be a neighbor.
1259 * If the address matches one of our on-link prefixes, it should be a
1264 LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
1265 if (pr->ndpr_ifp != ifp)
1268 if ((pr->ndpr_stateflags & NDPRF_ONLINK) == 0) {
1269 dst6 = (const struct sockaddr *)&pr->ndpr_prefix;
1272 * We only need to check all FIBs if add_addr_allfibs
1273 * is unset. If set, checking any FIB will suffice.
1275 fibnum = V_rt_add_addr_allfibs ? rt_numfibs - 1 : 0;
1276 for (; fibnum < rt_numfibs; fibnum++) {
1277 genid = V_nd6_list_genid;
1281 * Restore length field before
1284 rt_key.sin6_len = sizeof(rt_key);
1285 error = rib_lookup_info(fibnum, dst6, 0, 0,
1289 if (genid != V_nd6_list_genid)
1298 * This is the case where multiple interfaces
1299 * have the same prefix, but only one is installed
1300 * into the routing table and that prefix entry
1301 * is not the one being examined here. In the case
1302 * where RADIX_MPATH is enabled, multiple route
1303 * entries (of the same rt_key value) will be
1304 * installed because the interface addresses all
1307 if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
1312 if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
1313 &addr->sin6_addr, &pr->ndpr_mask)) {
1321 * If the address is assigned on the node of the other side of
1322 * a p2p interface, the address should be a neighbor.
1324 if (ifp->if_flags & IFF_POINTOPOINT) {
1325 struct epoch_tracker et;
1327 NET_EPOCH_ENTER(et);
1328 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1329 if (ifa->ifa_addr->sa_family != addr->sin6_family)
1331 if (ifa->ifa_dstaddr != NULL &&
1332 sa_equal(addr, ifa->ifa_dstaddr)) {
1341 * If the default router list is empty, all addresses are regarded
1342 * as on-link, and thus, as a neighbor.
1344 if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV &&
1345 nd6_defrouter_list_empty() &&
1346 V_nd6_defifindex == ifp->if_index) {
1355 * Detect if a given IPv6 address identifies a neighbor on a given link.
1356 * XXX: should take care of the destination of a p2p link?
1359 nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
1361 struct llentry *lle;
1365 IF_AFDATA_UNLOCK_ASSERT(ifp);
1366 if (nd6_is_new_addr_neighbor(addr, ifp))
1370 * Even if the address matches none of our addresses, it might be
1371 * in the neighbor cache.
1373 if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) {
1381 * Free an nd6 llinfo entry.
1382 * Since the function would cause significant changes in the kernel, DO NOT
1383 * make it global, unless you have a strong reason for the change, and are sure
1384 * that the change is safe.
1386 * Set noinline to be dtrace-friendly
1388 static __noinline void
1389 nd6_free(struct llentry **lnp, int gc)
1393 struct nd_defrouter *dr;
1398 LLE_WLOCK_ASSERT(ln);
1401 ifp = lltable_get_ifp(ln->lle_tbl);
1402 if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0)
1403 dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp);
1408 if ((ln->la_flags & LLE_DELETED) == 0)
1409 EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
1412 * we used to have pfctlinput(PRC_HOSTDEAD) here.
1413 * even though it is not harmful, it was not really necessary.
1417 nd6_llinfo_settimer_locked(ln, -1);
1419 if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1420 if (dr != NULL && dr->expire &&
1421 ln->ln_state == ND6_LLINFO_STALE && gc) {
1423 * If the reason for the deletion is just garbage
1424 * collection, and the neighbor is an active default
1425 * router, do not delete it. Instead, reset the GC
1426 * timer using the router's lifetime.
1427 * Simply deleting the entry would affect default
1428 * router selection, which is not necessarily a good
1429 * thing, especially when we're using router preference
1431 * XXX: the check for ln_state would be redundant,
1432 * but we intentionally keep it just in case.
1434 if (dr->expire > time_uptime)
1435 nd6_llinfo_settimer_locked(ln,
1436 (dr->expire - time_uptime) * hz);
1438 nd6_llinfo_settimer_locked(ln,
1439 (long)V_nd6_gctimer * hz);
1449 * Unreachablity of a router might affect the default
1450 * router selection and on-link detection of advertised
1455 * Temporarily fake the state to choose a new default
1456 * router and to perform on-link determination of
1457 * prefixes correctly.
1458 * Below the state will be set correctly,
1459 * or the entry itself will be deleted.
1461 ln->ln_state = ND6_LLINFO_INCOMPLETE;
1464 if (ln->ln_router || dr) {
1467 * We need to unlock to avoid a LOR with rt6_flush() with the
1468 * rnh and for the calls to pfxlist_onlink_check() and
1469 * defrouter_select_fib() in the block further down for calls
1470 * into nd6_lookup(). We still hold a ref.
1475 * rt6_flush must be called whether or not the neighbor
1476 * is in the Default Router List.
1477 * See a corresponding comment in nd6_na_input().
1479 rt6_flush(&ln->r_l3addr.addr6, ifp);
1484 * Since defrouter_select_fib() does not affect the
1485 * on-link determination and MIP6 needs the check
1486 * before the default router selection, we perform
1489 pfxlist_onlink_check();
1492 * Refresh default router list.
1494 defrouter_select_fib(dr->ifp->if_fib);
1498 * If this entry was added by an on-link redirect, remove the
1499 * corresponding host route.
1501 if (ln->la_flags & LLE_REDIRECT)
1502 nd6_free_redirect(ln);
1504 if (ln->ln_router || dr)
1509 * Save to unlock. We still hold an extra reference and will not
1510 * free(9) in llentry_free() if someone else holds one as well.
1513 IF_AFDATA_LOCK(ifp);
1515 /* Guard against race with other llentry_free(). */
1516 if (ln->la_flags & LLE_LINKED) {
1517 /* Remove callout reference */
1519 lltable_unlink_entry(ln->lle_tbl, ln);
1521 IF_AFDATA_UNLOCK(ifp);
1529 nd6_isdynrte(const struct rtentry *rt, void *xap)
1532 if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC))
1538 * Remove the rtentry for the given llentry,
1539 * both of which were installed by a redirect.
1542 nd6_free_redirect(const struct llentry *ln)
1545 struct sockaddr_in6 sin6;
1546 struct rt_addrinfo info;
1548 lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6);
1549 memset(&info, 0, sizeof(info));
1550 info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6;
1551 info.rti_filter = nd6_isdynrte;
1553 for (fibnum = 0; fibnum < rt_numfibs; fibnum++)
1554 rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum);
1558 * Rejuvenate this function for routing operations related
1562 nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
1564 struct sockaddr_in6 *gateway;
1565 struct nd_defrouter *dr;
1568 gateway = (struct sockaddr_in6 *)rt->rt_gateway;
1579 * Only indirect routes are interesting.
1581 if ((rt->rt_flags & RTF_GATEWAY) == 0)
1584 * check for default route
1586 if (IN6_ARE_ADDR_EQUAL(&in6addr_any,
1587 &SIN6(rt_key(rt))->sin6_addr)) {
1588 dr = defrouter_lookup(&gateway->sin6_addr, ifp);
1600 nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
1602 struct in6_ndireq *ndi = (struct in6_ndireq *)data;
1603 struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data;
1604 struct in6_ndifreq *ndif = (struct in6_ndifreq *)data;
1605 struct epoch_tracker et;
1608 if (ifp->if_afdata[AF_INET6] == NULL)
1609 return (EPFNOSUPPORT);
1611 case OSIOCGIFINFO_IN6:
1613 /* XXX: old ndp(8) assumes a positive value for linkmtu. */
1614 bzero(&ND, sizeof(ND));
1615 ND.linkmtu = IN6_LINKMTU(ifp);
1616 ND.maxmtu = ND_IFINFO(ifp)->maxmtu;
1617 ND.basereachable = ND_IFINFO(ifp)->basereachable;
1618 ND.reachable = ND_IFINFO(ifp)->reachable;
1619 ND.retrans = ND_IFINFO(ifp)->retrans;
1620 ND.flags = ND_IFINFO(ifp)->flags;
1621 ND.recalctm = ND_IFINFO(ifp)->recalctm;
1622 ND.chlim = ND_IFINFO(ifp)->chlim;
1624 case SIOCGIFINFO_IN6:
1625 ND = *ND_IFINFO(ifp);
1627 case SIOCSIFINFO_IN6:
1629 * used to change host variables from userland.
1630 * intended for a use on router to reflect RA configurations.
1632 /* 0 means 'unspecified' */
1633 if (ND.linkmtu != 0) {
1634 if (ND.linkmtu < IPV6_MMTU ||
1635 ND.linkmtu > IN6_LINKMTU(ifp)) {
1639 ND_IFINFO(ifp)->linkmtu = ND.linkmtu;
1642 if (ND.basereachable != 0) {
1643 int obasereachable = ND_IFINFO(ifp)->basereachable;
1645 ND_IFINFO(ifp)->basereachable = ND.basereachable;
1646 if (ND.basereachable != obasereachable)
1647 ND_IFINFO(ifp)->reachable =
1648 ND_COMPUTE_RTIME(ND.basereachable);
1650 if (ND.retrans != 0)
1651 ND_IFINFO(ifp)->retrans = ND.retrans;
1653 ND_IFINFO(ifp)->chlim = ND.chlim;
1655 case SIOCSIFINFO_FLAGS:
1658 struct in6_ifaddr *ia;
1660 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1661 !(ND.flags & ND6_IFF_IFDISABLED)) {
1662 /* ifdisabled 1->0 transision */
1665 * If the interface is marked as ND6_IFF_IFDISABLED and
1666 * has an link-local address with IN6_IFF_DUPLICATED,
1667 * do not clear ND6_IFF_IFDISABLED.
1668 * See RFC 4862, Section 5.4.5.
1670 NET_EPOCH_ENTER(et);
1671 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1672 if (ifa->ifa_addr->sa_family != AF_INET6)
1674 ia = (struct in6_ifaddr *)ifa;
1675 if ((ia->ia6_flags & IN6_IFF_DUPLICATED) &&
1676 IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1682 /* LLA is duplicated. */
1683 ND.flags |= ND6_IFF_IFDISABLED;
1684 log(LOG_ERR, "Cannot enable an interface"
1685 " with a link-local address marked"
1688 ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED;
1689 if (ifp->if_flags & IFF_UP)
1692 } else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1693 (ND.flags & ND6_IFF_IFDISABLED)) {
1694 /* ifdisabled 0->1 transision */
1695 /* Mark all IPv6 address as tentative. */
1697 ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
1698 if (V_ip6_dad_count > 0 &&
1699 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) {
1700 NET_EPOCH_ENTER(et);
1701 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead,
1703 if (ifa->ifa_addr->sa_family !=
1706 ia = (struct in6_ifaddr *)ifa;
1707 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1713 if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) {
1714 if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) {
1715 /* auto_linklocal 0->1 transision */
1717 /* If no link-local address on ifp, configure */
1718 ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL;
1719 in6_ifattach(ifp, NULL);
1720 } else if (!(ND.flags & ND6_IFF_IFDISABLED) &&
1721 ifp->if_flags & IFF_UP) {
1723 * When the IF already has
1724 * ND6_IFF_AUTO_LINKLOCAL, no link-local
1725 * address is assigned, and IFF_UP, try to
1728 NET_EPOCH_ENTER(et);
1729 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead,
1731 if (ifa->ifa_addr->sa_family !=
1734 ia = (struct in6_ifaddr *)ifa;
1735 if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1740 /* No LLA is configured. */
1741 in6_ifattach(ifp, NULL);
1744 ND_IFINFO(ifp)->flags = ND.flags;
1748 case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */
1749 /* sync kernel routing table with the default router list */
1751 defrouter_select_fib(RT_ALL_FIBS);
1753 case SIOCSPFXFLUSH_IN6:
1755 /* flush all the prefix advertised by routers */
1756 struct in6_ifaddr *ia, *ia_next;
1757 struct nd_prefix *pr, *next;
1758 struct nd_prhead prl;
1763 LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) {
1764 if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
1766 nd6_prefix_unlink(pr, &prl);
1770 while ((pr = LIST_FIRST(&prl)) != NULL) {
1771 LIST_REMOVE(pr, ndpr_entry);
1772 /* XXXRW: in6_ifaddrhead locking. */
1773 CK_STAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link,
1775 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
1778 if (ia->ia6_ndpr == pr)
1779 in6_purgeaddr(&ia->ia_ifa);
1785 case SIOCSRTRFLUSH_IN6:
1787 /* flush all the default routers */
1790 nd6_defrouter_flush_all();
1791 defrouter_select_fib(RT_ALL_FIBS);
1794 case SIOCGNBRINFO_IN6:
1797 struct in6_addr nb_addr = nbi->addr; /* make local for safety */
1799 if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0)
1802 NET_EPOCH_ENTER(et);
1803 ln = nd6_lookup(&nb_addr, 0, ifp);
1810 nbi->state = ln->ln_state;
1811 nbi->asked = ln->la_asked;
1812 nbi->isrouter = ln->ln_router;
1813 if (ln->la_expire == 0)
1816 nbi->expire = ln->la_expire + ln->lle_remtime / hz +
1817 (time_second - time_uptime);
1821 case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */
1822 ndif->ifindex = V_nd6_defifindex;
1824 case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */
1825 return (nd6_setdefaultiface(ndif->ifindex));
1831 * Calculates new isRouter value based on provided parameters and
1835 nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr,
1840 * ICMP6 type dependent behavior.
1842 * NS: clear IsRouter if new entry
1843 * RS: clear IsRouter
1844 * RA: set IsRouter if there's lladdr
1845 * redir: clear IsRouter if new entry
1848 * The spec says that we must set IsRouter in the following cases:
1849 * - If lladdr exist, set IsRouter. This means (1-5).
1850 * - If it is old entry (!newentry), set IsRouter. This means (7).
1851 * So, based on the spec, in (1-5) and (7) cases we must set IsRouter.
1852 * A quetion arises for (1) case. (1) case has no lladdr in the
1853 * neighbor cache, this is similar to (6).
1854 * This case is rare but we figured that we MUST NOT set IsRouter.
1856 * is_new old_addr new_addr NS RS RA redir
1863 * 1 -- n (6) c c c s
1864 * 1 -- y (7) c c s c s
1868 switch (type & 0xff) {
1869 case ND_NEIGHBOR_SOLICIT:
1871 * New entry must have is_router flag cleared.
1873 if (is_new) /* (6-7) */
1878 * If the icmp is a redirect to a better router, always set the
1879 * is_router flag. Otherwise, if the entry is newly created,
1880 * clear the flag. [RFC 2461, sec 8.3]
1882 if (code == ND_REDIRECT_ROUTER)
1885 if (is_new) /* (6-7) */
1889 case ND_ROUTER_SOLICIT:
1891 * is_router flag must always be cleared.
1895 case ND_ROUTER_ADVERT:
1897 * Mark an entry with lladdr as a router.
1899 if ((!is_new && (old_addr || new_addr)) || /* (2-5) */
1900 (is_new && new_addr)) { /* (7) */
1910 * Create neighbor cache entry and cache link-layer address,
1911 * on reception of inbound ND6 packets. (RS/RA/NS/redirect)
1914 * code - type dependent information
1918 nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr,
1919 int lladdrlen, int type, int code)
1921 struct llentry *ln = NULL, *ln_tmp;
1927 uint16_t router = 0;
1928 struct sockaddr_in6 sin6;
1929 struct mbuf *chain = NULL;
1930 u_char linkhdr[LLE_MAX_LINKHDR];
1935 IF_AFDATA_UNLOCK_ASSERT(ifp);
1937 KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__));
1938 KASSERT(from != NULL, ("%s: from == NULL", __func__));
1940 /* nothing must be updated for unspecified address */
1941 if (IN6_IS_ADDR_UNSPECIFIED(from))
1945 * Validation about ifp->if_addrlen and lladdrlen must be done in
1948 * XXX If the link does not have link-layer adderss, what should
1949 * we do? (ifp->if_addrlen == 0)
1950 * Spec says nothing in sections for RA, RS and NA. There's small
1951 * description on it in NS section (RFC 2461 7.2.3).
1953 flags = lladdr ? LLE_EXCLUSIVE : 0;
1954 ln = nd6_lookup(from, flags, ifp);
1957 flags |= LLE_EXCLUSIVE;
1958 ln = nd6_alloc(from, 0, ifp);
1963 * Since we already know all the data for the new entry,
1964 * fill it before insertion.
1966 if (lladdr != NULL) {
1967 linkhdrsize = sizeof(linkhdr);
1968 if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
1969 linkhdr, &linkhdrsize, &lladdr_off) != 0)
1971 lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
1975 IF_AFDATA_WLOCK(ifp);
1977 /* Prefer any existing lle over newly-created one */
1978 ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp);
1980 lltable_link_entry(LLTABLE6(ifp), ln);
1981 IF_AFDATA_WUNLOCK(ifp);
1982 if (ln_tmp == NULL) {
1983 /* No existing lle, mark as new entry (6,7) */
1985 if (lladdr != NULL) { /* (7) */
1986 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
1987 EVENTHANDLER_INVOKE(lle_event, ln,
1991 lltable_free_entry(LLTABLE6(ifp), ln);
1996 /* do nothing if static ndp is set */
1997 if ((ln->la_flags & LLE_STATIC)) {
1998 if (flags & LLE_EXCLUSIVE)
2005 olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0;
2006 if (olladdr && lladdr) {
2007 llchange = bcmp(lladdr, ln->ll_addr,
2009 } else if (!olladdr && lladdr)
2015 * newentry olladdr lladdr llchange (*=record)
2018 * 0 n y y (3) * STALE
2020 * 0 y y y (5) * STALE
2021 * 1 -- n -- (6) NOSTATE(= PASSIVE)
2022 * 1 -- y -- (7) * STALE
2026 if (is_newentry == 0 && llchange != 0) {
2027 do_update = 1; /* (3,5) */
2030 * Record source link-layer address
2031 * XXX is it dependent to ifp->if_type?
2033 linkhdrsize = sizeof(linkhdr);
2034 if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
2035 linkhdr, &linkhdrsize, &lladdr_off) != 0)
2038 if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
2040 /* Entry was deleted */
2044 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
2046 EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
2048 if (ln->la_hold != NULL)
2049 nd6_grab_holdchain(ln, &chain, &sin6);
2052 /* Calculates new router status */
2053 router = nd6_is_router(type, code, is_newentry, olladdr,
2054 lladdr != NULL ? 1 : 0, ln->ln_router);
2056 ln->ln_router = router;
2057 /* Mark non-router redirects with special flag */
2058 if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER)
2059 ln->la_flags |= LLE_REDIRECT;
2061 if (flags & LLE_EXCLUSIVE)
2067 nd6_flush_holdchain(ifp, chain, &sin6);
2070 * When the link-layer address of a router changes, select the
2071 * best router again. In particular, when the neighbor entry is newly
2072 * created, it might affect the selection policy.
2073 * Question: can we restrict the first condition to the "is_newentry"
2075 * XXX: when we hear an RA from a new router with the link-layer
2076 * address option, defrouter_select_fib() is called twice, since
2077 * defrtrlist_update called the function as well. However, I believe
2078 * we can compromise the overhead, since it only happens the first
2080 * XXX: although defrouter_select_fib() should not have a bad effect
2081 * for those are not autoconfigured hosts, we explicitly avoid such
2084 if ((do_update || is_newentry) && router &&
2085 ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
2087 * guaranteed recursion
2089 defrouter_select_fib(ifp->if_fib);
2094 nd6_slowtimo(void *arg)
2096 struct epoch_tracker et;
2097 CURVNET_SET((struct vnet *) arg);
2098 struct nd_ifinfo *nd6if;
2101 callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
2102 nd6_slowtimo, curvnet);
2103 NET_EPOCH_ENTER(et);
2104 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2105 if (ifp->if_afdata[AF_INET6] == NULL)
2107 nd6if = ND_IFINFO(ifp);
2108 if (nd6if->basereachable && /* already initialized */
2109 (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
2111 * Since reachable time rarely changes by router
2112 * advertisements, we SHOULD insure that a new random
2113 * value gets recomputed at least once every few hours.
2116 nd6if->recalctm = V_nd6_recalc_reachtm_interval;
2117 nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable);
2125 nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain,
2126 struct sockaddr_in6 *sin6)
2129 LLE_WLOCK_ASSERT(ln);
2131 *chain = ln->la_hold;
2133 lltable_fill_sa_entry(ln, (struct sockaddr *)sin6);
2135 if (ln->ln_state == ND6_LLINFO_STALE) {
2138 * The first time we send a packet to a
2139 * neighbor whose entry is STALE, we have
2140 * to change the state to DELAY and a sets
2141 * a timer to expire in DELAY_FIRST_PROBE_TIME
2142 * seconds to ensure do neighbor unreachability
2143 * detection on expiration.
2146 nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY);
2151 nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m,
2152 struct sockaddr_in6 *dst, struct route *ro)
2156 struct ip6_hdr *ip6;
2160 mac_netinet6_nd6_send(ifp, m);
2164 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
2165 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
2166 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
2167 * to be diverted to user space. When re-injected into the kernel,
2168 * send_output() will directly dispatch them to the outgoing interface.
2170 if (send_sendso_input_hook != NULL) {
2171 mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
2173 ip6 = mtod(m, struct ip6_hdr *);
2174 ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
2175 /* Use the SEND socket */
2176 error = send_sendso_input_hook(m, ifp, SND_OUT,
2178 /* -1 == no app on SEND socket */
2179 if (error == 0 || error != -1)
2184 m_clrprotoflags(m); /* Avoid confusing lower layers. */
2185 IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
2186 mtod(m, struct ip6_hdr *));
2188 if ((ifp->if_flags & IFF_LOOPBACK) == 0)
2191 error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro);
2196 * Lookup link headerfor @sa_dst address. Stores found
2197 * data in @desten buffer. Copy of lle ln_flags can be also
2198 * saved in @pflags if @pflags is non-NULL.
2200 * If destination LLE does not exists or lle state modification
2201 * is required, call "slow" version.
2204 * - 0 on success (address copied to buffer).
2205 * - EWOULDBLOCK (no local error, but address is still unresolved)
2206 * - other errors (alloc failure, etc)
2209 nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
2210 const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags,
2211 struct llentry **plle)
2213 struct llentry *ln = NULL;
2214 const struct sockaddr_in6 *dst6;
2221 dst6 = (const struct sockaddr_in6 *)sa_dst;
2223 /* discard the packet if IPv6 operation is disabled on the interface */
2224 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
2226 return (ENETDOWN); /* better error? */
2229 if (m != NULL && m->m_flags & M_MCAST) {
2230 switch (ifp->if_type) {
2234 ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr,
2239 return (EAFNOSUPPORT);
2243 ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED,
2245 if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) {
2246 /* Entry found, let's copy lle info */
2247 bcopy(ln->r_linkdata, desten, ln->r_hdrlen);
2249 *pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR);
2250 /* Check if we have feedback request from nd6 timer */
2251 if (ln->r_skip_req != 0) {
2253 ln->r_skip_req = 0; /* Notify that entry was used */
2254 ln->lle_hittime = time_uptime;
2263 } else if (plle && ln)
2266 return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle));
2271 * Do L2 address resolution for @sa_dst address. Stores found
2272 * address in @desten buffer. Copy of lle ln_flags can be also
2273 * saved in @pflags if @pflags is non-NULL.
2276 * Function assume that destination LLE does not exist,
2277 * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired.
2279 * Set noinline to be dtrace-friendly
2281 static __noinline int
2282 nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m,
2283 const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags,
2284 struct llentry **plle)
2286 struct llentry *lle = NULL, *lle_tmp;
2287 struct in6_addr *psrc, src;
2288 int send_ns, ll_len;
2294 * Address resolution or Neighbor Unreachability Detection
2296 * At this point, the destination of the packet must be a unicast
2297 * or an anycast address(i.e. not a multicast).
2300 lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2301 if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp)) {
2303 * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
2304 * the condition below is not very efficient. But we believe
2305 * it is tolerable, because this should be a rare case.
2307 lle = nd6_alloc(&dst->sin6_addr, 0, ifp);
2309 char ip6buf[INET6_ADDRSTRLEN];
2311 "nd6_output: can't allocate llinfo for %s "
2313 ip6_sprintf(ip6buf, &dst->sin6_addr), lle);
2318 IF_AFDATA_WLOCK(ifp);
2320 /* Prefer any existing entry over newly-created one */
2321 lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2322 if (lle_tmp == NULL)
2323 lltable_link_entry(LLTABLE6(ifp), lle);
2324 IF_AFDATA_WUNLOCK(ifp);
2325 if (lle_tmp != NULL) {
2326 lltable_free_entry(LLTABLE6(ifp), lle);
2337 LLE_WLOCK_ASSERT(lle);
2340 * The first time we send a packet to a neighbor whose entry is
2341 * STALE, we have to change the state to DELAY and a sets a timer to
2342 * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do
2343 * neighbor unreachability detection on expiration.
2346 if (lle->ln_state == ND6_LLINFO_STALE)
2347 nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY);
2350 * If the neighbor cache entry has a state other than INCOMPLETE
2351 * (i.e. its link-layer address is already resolved), just
2354 if (lle->ln_state > ND6_LLINFO_INCOMPLETE) {
2355 if (flags & LLE_ADDRONLY) {
2356 lladdr = lle->ll_addr;
2357 ll_len = ifp->if_addrlen;
2359 lladdr = lle->r_linkdata;
2360 ll_len = lle->r_hdrlen;
2362 bcopy(lladdr, desten, ll_len);
2364 *pflags = lle->la_flags;
2374 * There is a neighbor cache entry, but no ethernet address
2375 * response yet. Append this latest packet to the end of the
2376 * packet queue in the mbuf. When it exceeds nd6_maxqueuelen,
2377 * the oldest packet in the queue will be removed.
2380 if (lle->la_hold != NULL) {
2381 struct mbuf *m_hold;
2385 for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){
2387 if (m_hold->m_nextpkt == NULL) {
2388 m_hold->m_nextpkt = m;
2392 while (i >= V_nd6_maxqueuelen) {
2393 m_hold = lle->la_hold;
2394 lle->la_hold = lle->la_hold->m_nextpkt;
2403 * If there has been no NS for the neighbor after entering the
2404 * INCOMPLETE state, send the first solicitation.
2405 * Note that for newly-created lle la_asked will be 0,
2406 * so we will transition from ND6_LLINFO_NOSTATE to
2407 * ND6_LLINFO_INCOMPLETE state here.
2411 if (lle->la_asked == 0) {
2414 psrc = nd6_llinfo_get_holdsrc(lle, &src);
2416 nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE);
2420 nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL);
2422 return (EWOULDBLOCK);
2426 * Do L2 address resolution for @sa_dst address. Stores found
2427 * address in @desten buffer. Copy of lle ln_flags can be also
2428 * saved in @pflags if @pflags is non-NULL.
2431 * - 0 on success (address copied to buffer).
2432 * - EWOULDBLOCK (no local error, but address is still unresolved)
2433 * - other errors (alloc failure, etc)
2436 nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
2437 char *desten, uint32_t *pflags)
2441 flags |= LLE_ADDRONLY;
2442 error = nd6_resolve_slow(ifp, flags, NULL,
2443 (const struct sockaddr_in6 *)dst, desten, pflags, NULL);
2448 nd6_flush_holdchain(struct ifnet *ifp, struct mbuf *chain,
2449 struct sockaddr_in6 *dst)
2451 struct mbuf *m, *m_head;
2458 m_head = m_head->m_nextpkt;
2459 error = nd6_output_ifp(ifp, ifp, m, dst, NULL);
2464 * note that intermediate errors are blindly ignored
2470 nd6_need_cache(struct ifnet *ifp)
2473 * XXX: we currently do not make neighbor cache on any interface
2474 * other than Ethernet and GIF.
2477 * - unidirectional tunnels needs no ND
2479 switch (ifp->if_type) {
2483 case IFT_INFINIBAND:
2485 case IFT_PROPVIRTUAL:
2493 * Add pernament ND6 link-layer record for given
2494 * interface address.
2496 * Very similar to IPv4 arp_ifinit(), but:
2497 * 1) IPv6 DAD is performed in different place
2498 * 2) It is called by IPv6 protocol stack in contrast to
2499 * arp_ifinit() which is typically called in SIOCSIFADDR
2500 * driver ioctl handler.
2504 nd6_add_ifa_lle(struct in6_ifaddr *ia)
2507 struct llentry *ln, *ln_tmp;
2508 struct sockaddr *dst;
2510 ifp = ia->ia_ifa.ifa_ifp;
2511 if (nd6_need_cache(ifp) == 0)
2514 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
2515 dst = (struct sockaddr *)&ia->ia_addr;
2516 ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst);
2520 IF_AFDATA_WLOCK(ifp);
2522 /* Unlink any entry if exists */
2523 ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst);
2525 lltable_unlink_entry(LLTABLE6(ifp), ln_tmp);
2526 lltable_link_entry(LLTABLE6(ifp), ln);
2527 IF_AFDATA_WUNLOCK(ifp);
2530 EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED);
2531 EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
2535 llentry_free(ln_tmp);
2541 * Removes either all lle entries for given @ia, or lle
2542 * corresponding to @ia address.
2545 nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all)
2547 struct sockaddr_in6 mask, addr;
2548 struct sockaddr *saddr, *smask;
2551 ifp = ia->ia_ifa.ifa_ifp;
2552 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
2553 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
2554 saddr = (struct sockaddr *)&addr;
2555 smask = (struct sockaddr *)&mask;
2558 lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC);
2560 lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr);
2564 clear_llinfo_pqueue(struct llentry *ln)
2566 struct mbuf *m_hold, *m_hold_next;
2568 for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) {
2569 m_hold_next = m_hold->m_nextpkt;
2577 nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS)
2579 struct in6_prefix p;
2580 struct sockaddr_in6 s6;
2581 struct nd_prefix *pr;
2582 struct nd_pfxrouter *pfr;
2585 char ip6buf[INET6_ADDRSTRLEN];
2590 error = sysctl_wire_old_buffer(req, 0);
2594 bzero(&p, sizeof(p));
2595 p.origin = PR_ORIG_RA;
2596 bzero(&s6, sizeof(s6));
2597 s6.sin6_family = AF_INET6;
2598 s6.sin6_len = sizeof(s6);
2601 LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
2602 p.prefix = pr->ndpr_prefix;
2603 if (sa6_recoverscope(&p.prefix)) {
2604 log(LOG_ERR, "scope error in prefix list (%s)\n",
2605 ip6_sprintf(ip6buf, &p.prefix.sin6_addr));
2606 /* XXX: press on... */
2608 p.raflags = pr->ndpr_raf;
2609 p.prefixlen = pr->ndpr_plen;
2610 p.vltime = pr->ndpr_vltime;
2611 p.pltime = pr->ndpr_pltime;
2612 p.if_index = pr->ndpr_ifp->if_index;
2613 if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
2616 /* XXX: we assume time_t is signed. */
2618 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
2619 if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate)
2620 p.expire = pr->ndpr_lastupdate +
2622 (time_second - time_uptime);
2624 p.expire = maxexpire;
2626 p.refcnt = pr->ndpr_addrcnt;
2627 p.flags = pr->ndpr_stateflags;
2629 LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry)
2631 error = SYSCTL_OUT(req, &p, sizeof(p));
2634 LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
2635 s6.sin6_addr = pfr->router->rtaddr;
2636 if (sa6_recoverscope(&s6))
2638 "scope error in prefix list (%s)\n",
2639 ip6_sprintf(ip6buf, &pfr->router->rtaddr));
2640 error = SYSCTL_OUT(req, &s6, sizeof(s6));
2649 SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
2650 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
2651 NULL, 0, nd6_sysctl_prlist, "S,in6_prefix",
2653 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
2654 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
2655 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer,
2656 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), "");