2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 #include "opt_inet6.h"
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/callout.h>
41 #include <sys/malloc.h>
43 #include <sys/socket.h>
44 #include <sys/sockio.h>
46 #include <sys/kernel.h>
47 #include <sys/protosw.h>
48 #include <sys/errno.h>
49 #include <sys/syslog.h>
51 #include <sys/rwlock.h>
52 #include <sys/queue.h>
54 #include <sys/sysctl.h>
57 #include <net/if_var.h>
58 #include <net/if_arc.h>
59 #include <net/if_dl.h>
60 #include <net/if_types.h>
61 #include <net/iso88025.h>
63 #include <net/route.h>
66 #include <netinet/in.h>
67 #include <netinet/in_kdtrace.h>
68 #include <net/if_llatbl.h>
69 #include <netinet/if_ether.h>
70 #include <netinet6/in6_var.h>
71 #include <netinet/ip6.h>
72 #include <netinet6/ip6_var.h>
73 #include <netinet6/scope6_var.h>
74 #include <netinet6/nd6.h>
75 #include <netinet6/in6_ifattach.h>
76 #include <netinet/icmp6.h>
77 #include <netinet6/send.h>
79 #include <sys/limits.h>
81 #include <security/mac/mac_framework.h>
83 #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */
84 #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */
86 #define SIN6(s) ((const struct sockaddr_in6 *)(s))
88 MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
91 VNET_DEFINE(int, nd6_prune) = 1; /* walk list every 1 seconds */
92 VNET_DEFINE(int, nd6_delay) = 5; /* delay first probe time 5 second */
93 VNET_DEFINE(int, nd6_umaxtries) = 3; /* maximum unicast query */
94 VNET_DEFINE(int, nd6_mmaxtries) = 3; /* maximum multicast query */
95 VNET_DEFINE(int, nd6_useloopback) = 1; /* use loopback interface for
97 VNET_DEFINE(int, nd6_gctimer) = (60 * 60 * 24); /* 1 day: garbage
100 /* preventing too many loops in ND option parsing */
101 static VNET_DEFINE(int, nd6_maxndopt) = 10; /* max # of ND options allowed */
103 VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper
105 static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
107 #define V_nd6_maxndopt VNET(nd6_maxndopt)
108 #define V_nd6_maxqueuelen VNET(nd6_maxqueuelen)
111 VNET_DEFINE(int, nd6_debug) = 1;
113 VNET_DEFINE(int, nd6_debug) = 0;
116 static eventhandler_tag lle_event_eh, iflladdr_event_eh;
118 VNET_DEFINE(struct nd_drhead, nd_defrouter);
119 VNET_DEFINE(struct nd_prhead, nd_prefix);
120 VNET_DEFINE(struct rwlock, nd6_lock);
122 VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL;
123 #define V_nd6_recalc_reachtm_interval VNET(nd6_recalc_reachtm_interval)
125 int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
127 static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *,
129 static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *);
130 static void nd6_slowtimo(void *);
131 static int regen_tmpaddr(struct in6_ifaddr *);
132 static void nd6_free(struct llentry **, int);
133 static void nd6_free_redirect(const struct llentry *);
134 static void nd6_llinfo_timer(void *);
135 static void nd6_llinfo_settimer_locked(struct llentry *, long);
136 static void clear_llinfo_pqueue(struct llentry *);
137 static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
138 static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *,
139 const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **);
140 static int nd6_need_cache(struct ifnet *);
143 static VNET_DEFINE(struct callout, nd6_slowtimo_ch);
144 #define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch)
146 VNET_DEFINE(struct callout, nd6_timer_ch);
147 #define V_nd6_timer_ch VNET(nd6_timer_ch)
150 nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
152 struct rt_addrinfo rtinfo;
153 struct sockaddr_in6 dst;
154 struct sockaddr_dl gw;
158 LLE_WLOCK_ASSERT(lle);
160 if (lltable_get_af(lle->lle_tbl) != AF_INET6)
164 case LLENTRY_RESOLVED:
166 KASSERT(lle->la_flags & LLE_VALID,
167 ("%s: %p resolved but not valid?", __func__, lle));
169 case LLENTRY_EXPIRED:
176 ifp = lltable_get_ifp(lle->lle_tbl);
178 bzero(&dst, sizeof(dst));
179 bzero(&gw, sizeof(gw));
180 bzero(&rtinfo, sizeof(rtinfo));
181 lltable_fill_sa_entry(lle, (struct sockaddr *)&dst);
182 dst.sin6_scope_id = in6_getscopezone(ifp,
183 in6_addrscope(&dst.sin6_addr));
184 gw.sdl_len = sizeof(struct sockaddr_dl);
185 gw.sdl_family = AF_LINK;
186 gw.sdl_alen = ifp->if_addrlen;
187 gw.sdl_index = ifp->if_index;
188 gw.sdl_type = ifp->if_type;
189 if (evt == LLENTRY_RESOLVED)
190 bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen);
191 rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst;
192 rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw;
193 rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY;
194 rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | (
195 type == RTM_ADD ? RTF_UP: 0), 0, RT_DEFAULT_FIB);
199 * A handler for interface link layer address change event.
202 nd6_iflladdr(void *arg __unused, struct ifnet *ifp)
205 lltable_update_ifaddr(LLTABLE6(ifp));
212 rw_init(&V_nd6_lock, "nd6");
214 LIST_INIT(&V_nd_prefix);
216 /* initialization of the default router list */
217 TAILQ_INIT(&V_nd_defrouter);
220 callout_init(&V_nd6_slowtimo_ch, 0);
221 callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
222 nd6_slowtimo, curvnet);
224 callout_init(&V_nd6_timer_ch, 0);
225 callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet);
228 if (IS_DEFAULT_VNET(curvnet)) {
229 lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
230 NULL, EVENTHANDLER_PRI_ANY);
231 iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event,
232 nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
241 callout_drain(&V_nd6_slowtimo_ch);
242 callout_drain(&V_nd6_timer_ch);
243 if (IS_DEFAULT_VNET(curvnet)) {
244 EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
245 EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh);
247 rw_destroy(&V_nd6_lock);
252 nd6_ifattach(struct ifnet *ifp)
254 struct nd_ifinfo *nd;
256 nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO);
259 nd->chlim = IPV6_DEFHLIM;
260 nd->basereachable = REACHABLE_TIME;
261 nd->reachable = ND_COMPUTE_RTIME(nd->basereachable);
262 nd->retrans = RETRANS_TIMER;
264 nd->flags = ND6_IFF_PERFORMNUD;
266 /* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL.
267 * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by
268 * default regardless of the V_ip6_auto_linklocal configuration to
269 * give a reasonable default behavior.
271 if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) ||
272 (ifp->if_flags & IFF_LOOPBACK))
273 nd->flags |= ND6_IFF_AUTO_LINKLOCAL;
275 * A loopback interface does not need to accept RTADV.
276 * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by
277 * default regardless of the V_ip6_accept_rtadv configuration to
278 * prevent the interface from accepting RA messages arrived
279 * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV.
281 if (V_ip6_accept_rtadv &&
282 !(ifp->if_flags & IFF_LOOPBACK) &&
283 (ifp->if_type != IFT_BRIDGE))
284 nd->flags |= ND6_IFF_ACCEPT_RTADV;
285 if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK))
286 nd->flags |= ND6_IFF_NO_RADR;
288 /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */
289 nd6_setmtu0(ifp, nd);
295 nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd)
297 struct ifaddr *ifa, *next;
300 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
301 if (ifa->ifa_addr->sa_family != AF_INET6)
304 /* stop DAD processing */
307 IF_ADDR_RUNLOCK(ifp);
313 * Reset ND level link MTU. This function is called when the physical MTU
314 * changes, which means we might have to adjust the ND level MTU.
317 nd6_setmtu(struct ifnet *ifp)
319 if (ifp->if_afdata[AF_INET6] == NULL)
322 nd6_setmtu0(ifp, ND_IFINFO(ifp));
325 /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */
327 nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi)
331 omaxmtu = ndi->maxmtu;
333 switch (ifp->if_type) {
335 ndi->maxmtu = MIN(ARC_PHDS_MAXMTU, ifp->if_mtu); /* RFC2497 */
338 ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu); /* RFC2467 */
341 ndi->maxmtu = MIN(ISO88025_MAX_MTU, ifp->if_mtu);
344 ndi->maxmtu = ifp->if_mtu;
349 * Decreasing the interface MTU under IPV6 minimum MTU may cause
350 * undesirable situation. We thus notify the operator of the change
351 * explicitly. The check for omaxmtu is necessary to restrict the
352 * log to the case of changing the MTU, not initializing it.
354 if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) {
355 log(LOG_NOTICE, "nd6_setmtu0: "
356 "new link MTU on %s (%lu) is too small for IPv6\n",
357 if_name(ifp), (unsigned long)ndi->maxmtu);
360 if (ndi->maxmtu > V_in6_maxmtu)
361 in6_setmaxmtu(); /* check all interfaces just in case */
366 nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts)
369 bzero(ndopts, sizeof(*ndopts));
370 ndopts->nd_opts_search = (struct nd_opt_hdr *)opt;
372 = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len);
375 ndopts->nd_opts_done = 1;
376 ndopts->nd_opts_search = NULL;
381 * Take one ND option.
384 nd6_option(union nd_opts *ndopts)
386 struct nd_opt_hdr *nd_opt;
389 KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
390 KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
392 if (ndopts->nd_opts_search == NULL)
394 if (ndopts->nd_opts_done)
397 nd_opt = ndopts->nd_opts_search;
399 /* make sure nd_opt_len is inside the buffer */
400 if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
401 bzero(ndopts, sizeof(*ndopts));
405 olen = nd_opt->nd_opt_len << 3;
408 * Message validation requires that all included
409 * options have a length that is greater than zero.
411 bzero(ndopts, sizeof(*ndopts));
415 ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
416 if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
417 /* option overruns the end of buffer, invalid */
418 bzero(ndopts, sizeof(*ndopts));
420 } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
421 /* reached the end of options chain */
422 ndopts->nd_opts_done = 1;
423 ndopts->nd_opts_search = NULL;
429 * Parse multiple ND options.
430 * This function is much easier to use, for ND routines that do not need
431 * multiple options of the same type.
434 nd6_options(union nd_opts *ndopts)
436 struct nd_opt_hdr *nd_opt;
439 KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
440 KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
442 if (ndopts->nd_opts_search == NULL)
446 nd_opt = nd6_option(ndopts);
447 if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
449 * Message validation requires that all included
450 * options have a length that is greater than zero.
452 ICMP6STAT_INC(icp6s_nd_badopt);
453 bzero(ndopts, sizeof(*ndopts));
460 switch (nd_opt->nd_opt_type) {
461 case ND_OPT_SOURCE_LINKADDR:
462 case ND_OPT_TARGET_LINKADDR:
464 case ND_OPT_REDIRECTED_HEADER:
466 if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
468 "duplicated ND6 option found (type=%d)\n",
469 nd_opt->nd_opt_type));
472 ndopts->nd_opt_array[nd_opt->nd_opt_type]
476 case ND_OPT_PREFIX_INFORMATION:
477 if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) {
478 ndopts->nd_opt_array[nd_opt->nd_opt_type]
481 ndopts->nd_opts_pi_end =
482 (struct nd_opt_prefix_info *)nd_opt;
484 /* What about ND_OPT_ROUTE_INFO? RFC 4191 */
485 case ND_OPT_RDNSS: /* RFC 6106 */
486 case ND_OPT_DNSSL: /* RFC 6106 */
488 * Silently ignore options we know and do not care about
494 * Unknown options must be silently ignored,
495 * to accommodate future extension to the protocol.
498 "nd6_options: unsupported option %d - "
499 "option ignored\n", nd_opt->nd_opt_type));
504 if (i > V_nd6_maxndopt) {
505 ICMP6STAT_INC(icp6s_nd_toomanyopt);
506 nd6log((LOG_INFO, "too many loop in nd opt\n"));
510 if (ndopts->nd_opts_done)
518 * ND6 timer routine to handle ND6 entries
521 nd6_llinfo_settimer_locked(struct llentry *ln, long tick)
525 LLE_WLOCK_ASSERT(ln);
530 canceled = callout_stop(&ln->lle_timer);
532 ln->la_expire = time_uptime + tick / hz;
534 if (tick > INT_MAX) {
535 ln->ln_ntick = tick - INT_MAX;
536 canceled = callout_reset(&ln->lle_timer, INT_MAX,
537 nd6_llinfo_timer, ln);
540 canceled = callout_reset(&ln->lle_timer, tick,
541 nd6_llinfo_timer, ln);
549 * Gets source address of the first packet in hold queue
550 * and stores it in @src.
551 * Returns pointer to @src (if hold queue is not empty) or NULL.
553 * Set noinline to be dtrace-friendly
555 static __noinline struct in6_addr *
556 nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src)
561 if (ln->la_hold == NULL)
565 * assume every packet in la_hold has the same IP header
568 if (sizeof(hdr) > m->m_len)
571 m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
578 * Checks if we need to switch from STALE state.
580 * RFC 4861 requires switching from STALE to DELAY state
581 * on first packet matching entry, waiting V_nd6_delay and
582 * transition to PROBE state (if upper layer confirmation was
585 * This code performs a bit differently:
586 * On packet hit we don't change state (but desired state
587 * can be guessed by control plane). However, after V_nd6_delay
588 * seconds code will transition to PROBE state (so DELAY state
589 * is kinda skipped in most situations).
591 * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so
592 * we perform the following upon entering STALE state:
594 * 1) Arm timer to run each V_nd6_delay seconds to make sure that
595 * if packet was transmitted at the start of given interval, we
596 * would be able to switch to PROBE state in V_nd6_delay seconds
599 * 2) Reschedule timer until original V_nd6_gctimer expires keeping
600 * lle in STALE state (remaining timer value stored in lle_remtime).
602 * 3) Reschedule timer if packet was transmitted less that V_nd6_delay
605 * Returns non-zero value if the entry is still STALE (storing
606 * the next timer interval in @pdelay).
608 * Returns zero value if original timer expired or we need to switch to
609 * PROBE (store that in @do_switch variable).
612 nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch)
614 int nd_delay, nd_gctimer, r_skip_req;
619 nd_gctimer = V_nd6_gctimer;
620 nd_delay = V_nd6_delay;
623 r_skip_req = lle->r_skip_req;
624 lle_hittime = lle->lle_hittime;
627 if (r_skip_req > 0) {
630 * Nonzero r_skip_req value was set upon entering
631 * STALE state. Since value was not changed, no
632 * packets were passed using this lle. Ask for
633 * timer reschedule and keep STALE state.
635 delay = (long)(MIN(nd_gctimer, nd_delay));
637 if (lle->lle_remtime > delay)
638 lle->lle_remtime -= delay;
640 delay = lle->lle_remtime;
641 lle->lle_remtime = 0;
647 * The original ng6_gctime timeout ended,
648 * no more rescheduling.
658 * Packet received. Verify timestamp
660 delay = (long)(time_uptime - lle_hittime);
661 if (delay < nd_delay) {
664 * V_nd6_delay still not passed since the first
665 * hit in STALE state.
666 * Reshedule timer and return.
668 *pdelay = (long)(nd_delay - delay) * hz;
672 /* Request switching to probe */
679 * Switch @lle state to new state optionally arming timers.
681 * Set noinline to be dtrace-friendly
684 nd6_llinfo_setstate(struct llentry *lle, int newstate)
687 int nd_gctimer, nd_delay;
694 case ND6_LLINFO_INCOMPLETE:
695 ifp = lle->lle_tbl->llt_ifp;
696 delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000;
698 case ND6_LLINFO_REACHABLE:
699 if (!ND6_LLINFO_PERMANENT(lle)) {
700 ifp = lle->lle_tbl->llt_ifp;
701 delay = (long)ND_IFINFO(ifp)->reachable * hz;
704 case ND6_LLINFO_STALE:
707 * Notify fast path that we want to know if any packet
708 * is transmitted by setting r_skip_req.
713 nd_delay = V_nd6_delay;
714 nd_gctimer = V_nd6_gctimer;
716 delay = (long)(MIN(nd_gctimer, nd_delay)) * hz;
717 remtime = (long)nd_gctimer * hz - delay;
719 case ND6_LLINFO_DELAY:
721 delay = (long)V_nd6_delay * hz;
726 nd6_llinfo_settimer_locked(lle, delay);
728 lle->lle_remtime = remtime;
729 lle->ln_state = newstate;
733 * Timer-dependent part of nd state machine.
735 * Set noinline to be dtrace-friendly
737 static __noinline void
738 nd6_llinfo_timer(void *arg)
741 struct in6_addr *dst, *pdst, *psrc, src;
743 struct nd_ifinfo *ndi;
744 int do_switch, send_ns;
747 KASSERT(arg != NULL, ("%s: arg NULL", __func__));
748 ln = (struct llentry *)arg;
749 ifp = lltable_get_ifp(ln->lle_tbl);
750 CURVNET_SET(ifp->if_vnet);
754 if (callout_pending(&ln->lle_timer)) {
756 * Here we are a bit odd here in the treatment of
757 * active/pending. If the pending bit is set, it got
758 * rescheduled before I ran. The active
759 * bit we ignore, since if it was stopped
760 * in ll_tablefree() and was currently running
761 * it would have return 0 so the code would
762 * not have deleted it since the callout could
763 * not be stopped so we want to go through
764 * with the delete here now. If the callout
765 * was restarted, the pending bit will be back on and
766 * we just want to bail since the callout_reset would
767 * return 1 and our reference would have been removed
768 * by nd6_llinfo_settimer_locked above since canceled
776 ndi = ND_IFINFO(ifp);
778 dst = &ln->r_l3addr.addr6;
781 if (ln->ln_ntick > 0) {
782 if (ln->ln_ntick > INT_MAX) {
783 ln->ln_ntick -= INT_MAX;
784 nd6_llinfo_settimer_locked(ln, INT_MAX);
787 nd6_llinfo_settimer_locked(ln, ln->ln_ntick);
792 if (ln->la_flags & LLE_STATIC) {
796 if (ln->la_flags & LLE_DELETED) {
801 switch (ln->ln_state) {
802 case ND6_LLINFO_INCOMPLETE:
803 if (ln->la_asked < V_nd6_mmaxtries) {
806 /* Send NS to multicast address */
809 struct mbuf *m = ln->la_hold;
814 * assuming every packet in la_hold has the
815 * same IP header. Send error after unlock.
820 clear_llinfo_pqueue(ln);
824 icmp6_error2(m, ICMP6_DST_UNREACH,
825 ICMP6_DST_UNREACH_ADDR, 0, ifp);
828 case ND6_LLINFO_REACHABLE:
829 if (!ND6_LLINFO_PERMANENT(ln))
830 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
833 case ND6_LLINFO_STALE:
834 if (nd6_is_stale(ln, &delay, &do_switch) != 0) {
837 * No packet has used this entry and GC timeout
838 * has not been passed. Reshedule timer and
841 nd6_llinfo_settimer_locked(ln, delay);
845 if (do_switch == 0) {
848 * GC timer has ended and entry hasn't been used.
849 * Run Garbage collector (RFC 4861, 5.3)
851 if (!ND6_LLINFO_PERMANENT(ln))
856 /* Entry has been used AND delay timer has ended. */
860 case ND6_LLINFO_DELAY:
861 if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
864 nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE);
867 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */
869 case ND6_LLINFO_PROBE:
870 if (ln->la_asked < V_nd6_umaxtries) {
878 panic("%s: paths in a dark night can be confusing: %d",
879 __func__, ln->ln_state);
885 nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
886 psrc = nd6_llinfo_get_holdsrc(ln, &src);
889 nd6_ns_output(ifp, psrc, pdst, dst, NULL);
899 * ND6 timer routine to expire default route list and prefix list
904 CURVNET_SET((struct vnet *) arg);
905 struct nd_drhead drq;
906 struct nd_defrouter *dr, *ndr;
907 struct nd_prefix *pr, *npr;
908 struct in6_ifaddr *ia6, *nia6;
912 /* expire default router list */
914 TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr)
915 if (dr->expire && dr->expire < time_uptime)
916 defrouter_unlink(dr, &drq);
919 while ((dr = TAILQ_FIRST(&drq)) != NULL) {
920 TAILQ_REMOVE(&drq, dr, dr_entry);
925 * expire interface addresses.
926 * in the past the loop was inside prefix expiry processing.
927 * However, from a stricter speci-confrmance standpoint, we should
928 * rather separate address lifetimes and prefix lifetimes.
930 * XXXRW: in6_ifaddrhead locking.
933 TAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) {
934 /* check address lifetime */
935 if (IFA6_IS_INVALID(ia6)) {
939 * If the expiring address is temporary, try
940 * regenerating a new one. This would be useful when
941 * we suspended a laptop PC, then turned it on after a
942 * period that could invalidate all temporary
943 * addresses. Although we may have to restart the
944 * loop (see below), it must be after purging the
945 * address. Otherwise, we'd see an infinite loop of
948 if (V_ip6_use_tempaddr &&
949 (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
950 if (regen_tmpaddr(ia6) == 0)
954 in6_purgeaddr(&ia6->ia_ifa);
957 goto addrloop; /* XXX: see below */
958 } else if (IFA6_IS_DEPRECATED(ia6)) {
959 int oldflags = ia6->ia6_flags;
961 ia6->ia6_flags |= IN6_IFF_DEPRECATED;
964 * If a temporary address has just become deprecated,
965 * regenerate a new one if possible.
967 if (V_ip6_use_tempaddr &&
968 (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
969 (oldflags & IN6_IFF_DEPRECATED) == 0) {
971 if (regen_tmpaddr(ia6) == 0) {
973 * A new temporary address is
975 * XXX: this means the address chain
976 * has changed while we are still in
977 * the loop. Although the change
978 * would not cause disaster (because
979 * it's not a deletion, but an
980 * addition,) we'd rather restart the
981 * loop just for safety. Or does this
982 * significantly reduce performance??
987 } else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) {
989 * Schedule DAD for a tentative address. This happens
990 * if the interface was down or not running
991 * when the address was configured.
995 delay = arc4random() %
996 (MAX_RTR_SOLICITATION_DELAY * hz);
997 nd6_dad_start((struct ifaddr *)ia6, delay);
1000 * Check status of the interface. If it is down,
1001 * mark the address as tentative for future DAD.
1003 if ((ia6->ia_ifp->if_flags & IFF_UP) == 0 ||
1004 (ia6->ia_ifp->if_drv_flags & IFF_DRV_RUNNING)
1006 (ND_IFINFO(ia6->ia_ifp)->flags &
1007 ND6_IFF_IFDISABLED) != 0) {
1008 ia6->ia6_flags &= ~IN6_IFF_DUPLICATED;
1009 ia6->ia6_flags |= IN6_IFF_TENTATIVE;
1012 * A new RA might have made a deprecated address
1015 ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
1019 /* expire prefix list */
1020 LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1022 * check prefix lifetime.
1023 * since pltime is just for autoconf, pltime processing for
1024 * prefix is not necessary.
1026 if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME &&
1027 time_uptime - pr->ndpr_lastupdate > pr->ndpr_vltime) {
1030 * address expiration and prefix expiration are
1031 * separate. NEVER perform in6_purgeaddr here.
1037 callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz,
1038 nd6_timer, curvnet);
1044 * ia6 - deprecated/invalidated temporary address
1047 regen_tmpaddr(struct in6_ifaddr *ia6)
1051 struct in6_ifaddr *public_ifa6 = NULL;
1053 ifp = ia6->ia_ifa.ifa_ifp;
1055 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1056 struct in6_ifaddr *it6;
1058 if (ifa->ifa_addr->sa_family != AF_INET6)
1061 it6 = (struct in6_ifaddr *)ifa;
1063 /* ignore no autoconf addresses. */
1064 if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
1067 /* ignore autoconf addresses with different prefixes. */
1068 if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
1072 * Now we are looking at an autoconf address with the same
1073 * prefix as ours. If the address is temporary and is still
1074 * preferred, do not create another one. It would be rare, but
1075 * could happen, for example, when we resume a laptop PC after
1078 if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
1079 !IFA6_IS_DEPRECATED(it6)) {
1085 * This is a public autoconf address that has the same prefix
1086 * as ours. If it is preferred, keep it. We can't break the
1087 * loop here, because there may be a still-preferred temporary
1088 * address with the prefix.
1090 if (!IFA6_IS_DEPRECATED(it6))
1093 if (public_ifa6 != NULL)
1094 ifa_ref(&public_ifa6->ia_ifa);
1095 IF_ADDR_RUNLOCK(ifp);
1097 if (public_ifa6 != NULL) {
1100 if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
1101 ifa_free(&public_ifa6->ia_ifa);
1102 log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
1103 " tmp addr,errno=%d\n", e);
1106 ifa_free(&public_ifa6->ia_ifa);
1114 * Remove prefix and default router list entries corresponding to ifp. Neighbor
1115 * cache entries are freed in in6_domifdetach().
1118 nd6_purge(struct ifnet *ifp)
1120 struct nd_drhead drq;
1121 struct nd_defrouter *dr, *ndr;
1122 struct nd_prefix *pr, *npr;
1127 * Nuke default router list entries toward ifp.
1128 * We defer removal of default router list entries that is installed
1129 * in the routing table, in order to keep additional side effects as
1130 * small as possible.
1133 TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
1137 defrouter_unlink(dr, &drq);
1140 TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
1144 defrouter_unlink(dr, &drq);
1148 while ((dr = TAILQ_FIRST(&drq)) != NULL) {
1149 TAILQ_REMOVE(&drq, dr, dr_entry);
1153 /* Nuke prefix list entries toward ifp */
1154 LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1155 if (pr->ndpr_ifp == ifp) {
1157 * Because if_detach() does *not* release prefixes
1158 * while purging addresses the reference count will
1159 * still be above zero. We therefore reset it to
1160 * make sure that the prefix really gets purged.
1162 pr->ndpr_refcnt = 0;
1168 /* cancel default outgoing interface setting */
1169 if (V_nd6_defifindex == ifp->if_index)
1170 nd6_setdefaultiface(0);
1172 if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1173 /* Refresh default router list. */
1179 * the caller acquires and releases the lock on the lltbls
1180 * Returns the llentry locked
1183 nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1185 struct sockaddr_in6 sin6;
1188 bzero(&sin6, sizeof(sin6));
1189 sin6.sin6_len = sizeof(struct sockaddr_in6);
1190 sin6.sin6_family = AF_INET6;
1191 sin6.sin6_addr = *addr6;
1193 IF_AFDATA_LOCK_ASSERT(ifp);
1195 ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6);
1201 nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1203 struct sockaddr_in6 sin6;
1206 bzero(&sin6, sizeof(sin6));
1207 sin6.sin6_len = sizeof(struct sockaddr_in6);
1208 sin6.sin6_family = AF_INET6;
1209 sin6.sin6_addr = *addr6;
1211 ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6);
1213 ln->ln_state = ND6_LLINFO_NOSTATE;
1219 * Test whether a given IPv6 address is a neighbor or not, ignoring
1220 * the actual neighbor cache. The neighbor cache is ignored in order
1221 * to not reenter the routing code from within itself.
1224 nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
1226 struct nd_prefix *pr;
1227 struct ifaddr *dstaddr;
1228 struct rt_addrinfo info;
1229 struct sockaddr_in6 rt_key;
1230 struct sockaddr *dst6;
1234 * A link-local address is always a neighbor.
1235 * XXX: a link does not necessarily specify a single interface.
1237 if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
1238 struct sockaddr_in6 sin6_copy;
1242 * We need sin6_copy since sa6_recoverscope() may modify the
1246 if (sa6_recoverscope(&sin6_copy))
1247 return (0); /* XXX: should be impossible */
1248 if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
1250 if (sin6_copy.sin6_scope_id == zone)
1256 bzero(&rt_key, sizeof(rt_key));
1257 bzero(&info, sizeof(info));
1258 info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key;
1260 /* Always use the default FIB here. XXME - why? */
1261 fibnum = RT_DEFAULT_FIB;
1264 * If the address matches one of our addresses,
1265 * it should be a neighbor.
1266 * If the address matches one of our on-link prefixes, it should be a
1269 LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
1270 if (pr->ndpr_ifp != ifp)
1273 if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) {
1275 /* Always use the default FIB here. */
1276 dst6 = (struct sockaddr *)&pr->ndpr_prefix;
1278 /* Restore length field before retrying lookup */
1279 rt_key.sin6_len = sizeof(rt_key);
1280 if (rib_lookup_info(fibnum, dst6, 0, 0, &info) != 0)
1283 * This is the case where multiple interfaces
1284 * have the same prefix, but only one is installed
1285 * into the routing table and that prefix entry
1286 * is not the one being examined here. In the case
1287 * where RADIX_MPATH is enabled, multiple route
1288 * entries (of the same rt_key value) will be
1289 * installed because the interface addresses all
1292 if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
1297 if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
1298 &addr->sin6_addr, &pr->ndpr_mask))
1303 * If the address is assigned on the node of the other side of
1304 * a p2p interface, the address should be a neighbor.
1306 dstaddr = ifa_ifwithdstaddr((const struct sockaddr *)addr, RT_ALL_FIBS);
1307 if (dstaddr != NULL) {
1308 if (dstaddr->ifa_ifp == ifp) {
1316 * If the default router list is empty, all addresses are regarded
1317 * as on-link, and thus, as a neighbor.
1319 if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV &&
1320 TAILQ_EMPTY(&V_nd_defrouter) &&
1321 V_nd6_defifindex == ifp->if_index) {
1330 * Detect if a given IPv6 address identifies a neighbor on a given link.
1331 * XXX: should take care of the destination of a p2p link?
1334 nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
1336 struct llentry *lle;
1339 IF_AFDATA_UNLOCK_ASSERT(ifp);
1340 if (nd6_is_new_addr_neighbor(addr, ifp))
1344 * Even if the address matches none of our addresses, it might be
1345 * in the neighbor cache.
1347 IF_AFDATA_RLOCK(ifp);
1348 if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) {
1352 IF_AFDATA_RUNLOCK(ifp);
1357 * Free an nd6 llinfo entry.
1358 * Since the function would cause significant changes in the kernel, DO NOT
1359 * make it global, unless you have a strong reason for the change, and are sure
1360 * that the change is safe.
1362 * Set noinline to be dtrace-friendly
1364 static __noinline void
1365 nd6_free(struct llentry **lnp, int gc)
1369 struct nd_defrouter *dr;
1374 LLE_WLOCK_ASSERT(ln);
1377 ifp = lltable_get_ifp(ln->lle_tbl);
1378 if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0)
1379 dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp);
1384 if ((ln->la_flags & LLE_DELETED) == 0)
1385 EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
1388 * we used to have pfctlinput(PRC_HOSTDEAD) here.
1389 * even though it is not harmful, it was not really necessary.
1393 nd6_llinfo_settimer_locked(ln, -1);
1395 if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1396 if (dr != NULL && dr->expire &&
1397 ln->ln_state == ND6_LLINFO_STALE && gc) {
1399 * If the reason for the deletion is just garbage
1400 * collection, and the neighbor is an active default
1401 * router, do not delete it. Instead, reset the GC
1402 * timer using the router's lifetime.
1403 * Simply deleting the entry would affect default
1404 * router selection, which is not necessarily a good
1405 * thing, especially when we're using router preference
1407 * XXX: the check for ln_state would be redundant,
1408 * but we intentionally keep it just in case.
1410 if (dr->expire > time_uptime)
1411 nd6_llinfo_settimer_locked(ln,
1412 (dr->expire - time_uptime) * hz);
1414 nd6_llinfo_settimer_locked(ln,
1415 (long)V_nd6_gctimer * hz);
1425 * Unreachablity of a router might affect the default
1426 * router selection and on-link detection of advertised
1431 * Temporarily fake the state to choose a new default
1432 * router and to perform on-link determination of
1433 * prefixes correctly.
1434 * Below the state will be set correctly,
1435 * or the entry itself will be deleted.
1437 ln->ln_state = ND6_LLINFO_INCOMPLETE;
1440 if (ln->ln_router || dr) {
1443 * We need to unlock to avoid a LOR with rt6_flush() with the
1444 * rnh and for the calls to pfxlist_onlink_check() and
1445 * defrouter_select() in the block further down for calls
1446 * into nd6_lookup(). We still hold a ref.
1451 * rt6_flush must be called whether or not the neighbor
1452 * is in the Default Router List.
1453 * See a corresponding comment in nd6_na_input().
1455 rt6_flush(&ln->r_l3addr.addr6, ifp);
1460 * Since defrouter_select() does not affect the
1461 * on-link determination and MIP6 needs the check
1462 * before the default router selection, we perform
1465 pfxlist_onlink_check();
1468 * Refresh default router list.
1474 * If this entry was added by an on-link redirect, remove the
1475 * corresponding host route.
1477 if (ln->la_flags & LLE_REDIRECT)
1478 nd6_free_redirect(ln);
1480 if (ln->ln_router || dr)
1485 * Save to unlock. We still hold an extra reference and will not
1486 * free(9) in llentry_free() if someone else holds one as well.
1489 IF_AFDATA_LOCK(ifp);
1491 /* Guard against race with other llentry_free(). */
1492 if (ln->la_flags & LLE_LINKED) {
1493 /* Remove callout reference */
1495 lltable_unlink_entry(ln->lle_tbl, ln);
1497 IF_AFDATA_UNLOCK(ifp);
1505 nd6_isdynrte(const struct rtentry *rt, void *xap)
1508 if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC))
1514 * Remove the rtentry for the given llentry,
1515 * both of which were installed by a redirect.
1518 nd6_free_redirect(const struct llentry *ln)
1521 struct sockaddr_in6 sin6;
1522 struct rt_addrinfo info;
1524 lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6);
1525 memset(&info, 0, sizeof(info));
1526 info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6;
1527 info.rti_filter = nd6_isdynrte;
1529 for (fibnum = 0; fibnum < rt_numfibs; fibnum++)
1530 rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum);
1534 * Rejuvenate this function for routing operations related
1538 nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
1540 struct sockaddr_in6 *gateway;
1541 struct nd_defrouter *dr;
1544 gateway = (struct sockaddr_in6 *)rt->rt_gateway;
1555 * Only indirect routes are interesting.
1557 if ((rt->rt_flags & RTF_GATEWAY) == 0)
1560 * check for default route
1562 if (IN6_ARE_ADDR_EQUAL(&in6addr_any,
1563 &SIN6(rt_key(rt))->sin6_addr)) {
1564 dr = defrouter_lookup(&gateway->sin6_addr, ifp);
1576 nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
1578 struct in6_ndireq *ndi = (struct in6_ndireq *)data;
1579 struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data;
1580 struct in6_ndifreq *ndif = (struct in6_ndifreq *)data;
1583 if (ifp->if_afdata[AF_INET6] == NULL)
1584 return (EPFNOSUPPORT);
1586 case OSIOCGIFINFO_IN6:
1588 /* XXX: old ndp(8) assumes a positive value for linkmtu. */
1589 bzero(&ND, sizeof(ND));
1590 ND.linkmtu = IN6_LINKMTU(ifp);
1591 ND.maxmtu = ND_IFINFO(ifp)->maxmtu;
1592 ND.basereachable = ND_IFINFO(ifp)->basereachable;
1593 ND.reachable = ND_IFINFO(ifp)->reachable;
1594 ND.retrans = ND_IFINFO(ifp)->retrans;
1595 ND.flags = ND_IFINFO(ifp)->flags;
1596 ND.recalctm = ND_IFINFO(ifp)->recalctm;
1597 ND.chlim = ND_IFINFO(ifp)->chlim;
1599 case SIOCGIFINFO_IN6:
1600 ND = *ND_IFINFO(ifp);
1602 case SIOCSIFINFO_IN6:
1604 * used to change host variables from userland.
1605 * intended for a use on router to reflect RA configurations.
1607 /* 0 means 'unspecified' */
1608 if (ND.linkmtu != 0) {
1609 if (ND.linkmtu < IPV6_MMTU ||
1610 ND.linkmtu > IN6_LINKMTU(ifp)) {
1614 ND_IFINFO(ifp)->linkmtu = ND.linkmtu;
1617 if (ND.basereachable != 0) {
1618 int obasereachable = ND_IFINFO(ifp)->basereachable;
1620 ND_IFINFO(ifp)->basereachable = ND.basereachable;
1621 if (ND.basereachable != obasereachable)
1622 ND_IFINFO(ifp)->reachable =
1623 ND_COMPUTE_RTIME(ND.basereachable);
1625 if (ND.retrans != 0)
1626 ND_IFINFO(ifp)->retrans = ND.retrans;
1628 ND_IFINFO(ifp)->chlim = ND.chlim;
1630 case SIOCSIFINFO_FLAGS:
1633 struct in6_ifaddr *ia;
1635 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1636 !(ND.flags & ND6_IFF_IFDISABLED)) {
1637 /* ifdisabled 1->0 transision */
1640 * If the interface is marked as ND6_IFF_IFDISABLED and
1641 * has an link-local address with IN6_IFF_DUPLICATED,
1642 * do not clear ND6_IFF_IFDISABLED.
1643 * See RFC 4862, Section 5.4.5.
1646 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1647 if (ifa->ifa_addr->sa_family != AF_INET6)
1649 ia = (struct in6_ifaddr *)ifa;
1650 if ((ia->ia6_flags & IN6_IFF_DUPLICATED) &&
1651 IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1654 IF_ADDR_RUNLOCK(ifp);
1657 /* LLA is duplicated. */
1658 ND.flags |= ND6_IFF_IFDISABLED;
1659 log(LOG_ERR, "Cannot enable an interface"
1660 " with a link-local address marked"
1663 ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED;
1664 if (ifp->if_flags & IFF_UP)
1667 } else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1668 (ND.flags & ND6_IFF_IFDISABLED)) {
1669 /* ifdisabled 0->1 transision */
1670 /* Mark all IPv6 address as tentative. */
1672 ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
1673 if (V_ip6_dad_count > 0 &&
1674 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) {
1676 TAILQ_FOREACH(ifa, &ifp->if_addrhead,
1678 if (ifa->ifa_addr->sa_family !=
1681 ia = (struct in6_ifaddr *)ifa;
1682 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1684 IF_ADDR_RUNLOCK(ifp);
1688 if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) {
1689 if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) {
1690 /* auto_linklocal 0->1 transision */
1692 /* If no link-local address on ifp, configure */
1693 ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL;
1694 in6_ifattach(ifp, NULL);
1695 } else if (!(ND.flags & ND6_IFF_IFDISABLED) &&
1696 ifp->if_flags & IFF_UP) {
1698 * When the IF already has
1699 * ND6_IFF_AUTO_LINKLOCAL, no link-local
1700 * address is assigned, and IFF_UP, try to
1704 TAILQ_FOREACH(ifa, &ifp->if_addrhead,
1706 if (ifa->ifa_addr->sa_family !=
1709 ia = (struct in6_ifaddr *)ifa;
1710 if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1713 IF_ADDR_RUNLOCK(ifp);
1715 /* No LLA is configured. */
1716 in6_ifattach(ifp, NULL);
1720 ND_IFINFO(ifp)->flags = ND.flags;
1723 case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */
1724 /* sync kernel routing table with the default router list */
1728 case SIOCSPFXFLUSH_IN6:
1730 /* flush all the prefix advertised by routers */
1731 struct nd_prefix *pr, *next;
1733 LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) {
1734 struct in6_ifaddr *ia, *ia_next;
1736 if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
1739 /* do we really have to remove addresses as well? */
1740 /* XXXRW: in6_ifaddrhead locking. */
1741 TAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link,
1743 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
1746 if (ia->ia6_ndpr == pr)
1747 in6_purgeaddr(&ia->ia_ifa);
1753 case SIOCSRTRFLUSH_IN6:
1755 /* flush all the default routers */
1756 struct nd_drhead drq;
1757 struct nd_defrouter *dr;
1764 while ((dr = TAILQ_FIRST(&V_nd_defrouter)) != NULL)
1765 defrouter_unlink(dr, &drq);
1767 while ((dr = TAILQ_FIRST(&drq)) != NULL) {
1768 TAILQ_REMOVE(&drq, dr, dr_entry);
1775 case SIOCGNBRINFO_IN6:
1778 struct in6_addr nb_addr = nbi->addr; /* make local for safety */
1780 if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0)
1783 IF_AFDATA_RLOCK(ifp);
1784 ln = nd6_lookup(&nb_addr, 0, ifp);
1785 IF_AFDATA_RUNLOCK(ifp);
1791 nbi->state = ln->ln_state;
1792 nbi->asked = ln->la_asked;
1793 nbi->isrouter = ln->ln_router;
1794 if (ln->la_expire == 0)
1797 nbi->expire = ln->la_expire + ln->lle_remtime / hz +
1798 (time_second - time_uptime);
1802 case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */
1803 ndif->ifindex = V_nd6_defifindex;
1805 case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */
1806 return (nd6_setdefaultiface(ndif->ifindex));
1812 * Calculates new isRouter value based on provided parameters and
1816 nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr,
1821 * ICMP6 type dependent behavior.
1823 * NS: clear IsRouter if new entry
1824 * RS: clear IsRouter
1825 * RA: set IsRouter if there's lladdr
1826 * redir: clear IsRouter if new entry
1829 * The spec says that we must set IsRouter in the following cases:
1830 * - If lladdr exist, set IsRouter. This means (1-5).
1831 * - If it is old entry (!newentry), set IsRouter. This means (7).
1832 * So, based on the spec, in (1-5) and (7) cases we must set IsRouter.
1833 * A quetion arises for (1) case. (1) case has no lladdr in the
1834 * neighbor cache, this is similar to (6).
1835 * This case is rare but we figured that we MUST NOT set IsRouter.
1837 * is_new old_addr new_addr NS RS RA redir
1844 * 1 -- n (6) c c c s
1845 * 1 -- y (7) c c s c s
1849 switch (type & 0xff) {
1850 case ND_NEIGHBOR_SOLICIT:
1852 * New entry must have is_router flag cleared.
1854 if (is_new) /* (6-7) */
1859 * If the icmp is a redirect to a better router, always set the
1860 * is_router flag. Otherwise, if the entry is newly created,
1861 * clear the flag. [RFC 2461, sec 8.3]
1863 if (code == ND_REDIRECT_ROUTER)
1866 if (is_new) /* (6-7) */
1870 case ND_ROUTER_SOLICIT:
1872 * is_router flag must always be cleared.
1876 case ND_ROUTER_ADVERT:
1878 * Mark an entry with lladdr as a router.
1880 if ((!is_new && (old_addr || new_addr)) || /* (2-5) */
1881 (is_new && new_addr)) { /* (7) */
1891 * Create neighbor cache entry and cache link-layer address,
1892 * on reception of inbound ND6 packets. (RS/RA/NS/redirect)
1895 * code - type dependent information
1899 nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr,
1900 int lladdrlen, int type, int code)
1902 struct llentry *ln = NULL, *ln_tmp;
1908 uint16_t router = 0;
1909 struct sockaddr_in6 sin6;
1910 struct mbuf *chain = NULL;
1911 u_char linkhdr[LLE_MAX_LINKHDR];
1915 IF_AFDATA_UNLOCK_ASSERT(ifp);
1917 KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__));
1918 KASSERT(from != NULL, ("%s: from == NULL", __func__));
1920 /* nothing must be updated for unspecified address */
1921 if (IN6_IS_ADDR_UNSPECIFIED(from))
1925 * Validation about ifp->if_addrlen and lladdrlen must be done in
1928 * XXX If the link does not have link-layer adderss, what should
1929 * we do? (ifp->if_addrlen == 0)
1930 * Spec says nothing in sections for RA, RS and NA. There's small
1931 * description on it in NS section (RFC 2461 7.2.3).
1933 flags = lladdr ? LLE_EXCLUSIVE : 0;
1934 IF_AFDATA_RLOCK(ifp);
1935 ln = nd6_lookup(from, flags, ifp);
1936 IF_AFDATA_RUNLOCK(ifp);
1939 flags |= LLE_EXCLUSIVE;
1940 ln = nd6_alloc(from, 0, ifp);
1945 * Since we already know all the data for the new entry,
1946 * fill it before insertion.
1948 if (lladdr != NULL) {
1949 linkhdrsize = sizeof(linkhdr);
1950 if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
1951 linkhdr, &linkhdrsize, &lladdr_off) != 0)
1953 lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
1957 IF_AFDATA_WLOCK(ifp);
1959 /* Prefer any existing lle over newly-created one */
1960 ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp);
1962 lltable_link_entry(LLTABLE6(ifp), ln);
1963 IF_AFDATA_WUNLOCK(ifp);
1964 if (ln_tmp == NULL) {
1965 /* No existing lle, mark as new entry (6,7) */
1967 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
1968 if (lladdr != NULL) /* (7) */
1969 EVENTHANDLER_INVOKE(lle_event, ln,
1972 lltable_free_entry(LLTABLE6(ifp), ln);
1977 /* do nothing if static ndp is set */
1978 if ((ln->la_flags & LLE_STATIC)) {
1979 if (flags & LLE_EXCLUSIVE)
1986 olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0;
1987 if (olladdr && lladdr) {
1988 llchange = bcmp(lladdr, ln->ll_addr,
1990 } else if (!olladdr && lladdr)
1996 * newentry olladdr lladdr llchange (*=record)
1999 * 0 n y y (3) * STALE
2001 * 0 y y y (5) * STALE
2002 * 1 -- n -- (6) NOSTATE(= PASSIVE)
2003 * 1 -- y -- (7) * STALE
2007 if (is_newentry == 0 && llchange != 0) {
2008 do_update = 1; /* (3,5) */
2011 * Record source link-layer address
2012 * XXX is it dependent to ifp->if_type?
2014 linkhdrsize = sizeof(linkhdr);
2015 if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
2016 linkhdr, &linkhdrsize, &lladdr_off) != 0)
2019 if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
2021 /* Entry was deleted */
2025 nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
2027 EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
2029 if (ln->la_hold != NULL)
2030 nd6_grab_holdchain(ln, &chain, &sin6);
2033 /* Calculates new router status */
2034 router = nd6_is_router(type, code, is_newentry, olladdr,
2035 lladdr != NULL ? 1 : 0, ln->ln_router);
2037 ln->ln_router = router;
2038 /* Mark non-router redirects with special flag */
2039 if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER)
2040 ln->la_flags |= LLE_REDIRECT;
2042 if (flags & LLE_EXCLUSIVE)
2048 nd6_flush_holdchain(ifp, ifp, chain, &sin6);
2051 * When the link-layer address of a router changes, select the
2052 * best router again. In particular, when the neighbor entry is newly
2053 * created, it might affect the selection policy.
2054 * Question: can we restrict the first condition to the "is_newentry"
2056 * XXX: when we hear an RA from a new router with the link-layer
2057 * address option, defrouter_select() is called twice, since
2058 * defrtrlist_update called the function as well. However, I believe
2059 * we can compromise the overhead, since it only happens the first
2061 * XXX: although defrouter_select() should not have a bad effect
2062 * for those are not autoconfigured hosts, we explicitly avoid such
2065 if ((do_update || is_newentry) && router &&
2066 ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
2068 * guaranteed recursion
2075 nd6_slowtimo(void *arg)
2077 CURVNET_SET((struct vnet *) arg);
2078 struct nd_ifinfo *nd6if;
2081 callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
2082 nd6_slowtimo, curvnet);
2083 IFNET_RLOCK_NOSLEEP();
2084 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2085 if (ifp->if_afdata[AF_INET6] == NULL)
2087 nd6if = ND_IFINFO(ifp);
2088 if (nd6if->basereachable && /* already initialized */
2089 (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
2091 * Since reachable time rarely changes by router
2092 * advertisements, we SHOULD insure that a new random
2093 * value gets recomputed at least once every few hours.
2096 nd6if->recalctm = V_nd6_recalc_reachtm_interval;
2097 nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable);
2100 IFNET_RUNLOCK_NOSLEEP();
2105 nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain,
2106 struct sockaddr_in6 *sin6)
2109 LLE_WLOCK_ASSERT(ln);
2111 *chain = ln->la_hold;
2113 lltable_fill_sa_entry(ln, (struct sockaddr *)sin6);
2115 if (ln->ln_state == ND6_LLINFO_STALE) {
2118 * The first time we send a packet to a
2119 * neighbor whose entry is STALE, we have
2120 * to change the state to DELAY and a sets
2121 * a timer to expire in DELAY_FIRST_PROBE_TIME
2122 * seconds to ensure do neighbor unreachability
2123 * detection on expiration.
2126 nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY);
2131 nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m,
2132 struct sockaddr_in6 *dst, struct route *ro)
2136 struct ip6_hdr *ip6;
2140 mac_netinet6_nd6_send(ifp, m);
2144 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
2145 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
2146 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
2147 * to be diverted to user space. When re-injected into the kernel,
2148 * send_output() will directly dispatch them to the outgoing interface.
2150 if (send_sendso_input_hook != NULL) {
2151 mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
2153 ip6 = mtod(m, struct ip6_hdr *);
2154 ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
2155 /* Use the SEND socket */
2156 error = send_sendso_input_hook(m, ifp, SND_OUT,
2158 /* -1 == no app on SEND socket */
2159 if (error == 0 || error != -1)
2164 m_clrprotoflags(m); /* Avoid confusing lower layers. */
2165 IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
2166 mtod(m, struct ip6_hdr *));
2168 if ((ifp->if_flags & IFF_LOOPBACK) == 0)
2171 error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro);
2176 * Lookup link headerfor @sa_dst address. Stores found
2177 * data in @desten buffer. Copy of lle ln_flags can be also
2178 * saved in @pflags if @pflags is non-NULL.
2180 * If destination LLE does not exists or lle state modification
2181 * is required, call "slow" version.
2184 * - 0 on success (address copied to buffer).
2185 * - EWOULDBLOCK (no local error, but address is still unresolved)
2186 * - other errors (alloc failure, etc)
2189 nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
2190 const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags,
2191 struct llentry **plle)
2193 struct llentry *ln = NULL;
2194 const struct sockaddr_in6 *dst6;
2199 dst6 = (const struct sockaddr_in6 *)sa_dst;
2201 /* discard the packet if IPv6 operation is disabled on the interface */
2202 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
2204 return (ENETDOWN); /* better error? */
2207 if (m != NULL && m->m_flags & M_MCAST) {
2208 switch (ifp->if_type) {
2215 ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr,
2220 return (EAFNOSUPPORT);
2224 IF_AFDATA_RLOCK(ifp);
2225 ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED,
2227 if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) {
2228 /* Entry found, let's copy lle info */
2229 bcopy(ln->r_linkdata, desten, ln->r_hdrlen);
2231 *pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR);
2232 /* Check if we have feedback request from nd6 timer */
2233 if (ln->r_skip_req != 0) {
2235 ln->r_skip_req = 0; /* Notify that entry was used */
2236 ln->lle_hittime = time_uptime;
2244 IF_AFDATA_RUNLOCK(ifp);
2246 } else if (plle && ln)
2248 IF_AFDATA_RUNLOCK(ifp);
2250 return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle));
2255 * Do L2 address resolution for @sa_dst address. Stores found
2256 * address in @desten buffer. Copy of lle ln_flags can be also
2257 * saved in @pflags if @pflags is non-NULL.
2260 * Function assume that destination LLE does not exist,
2261 * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired.
2263 * Set noinline to be dtrace-friendly
2265 static __noinline int
2266 nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m,
2267 const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags,
2268 struct llentry **plle)
2270 struct llentry *lle = NULL, *lle_tmp;
2271 struct in6_addr *psrc, src;
2272 int send_ns, ll_len;
2276 * Address resolution or Neighbor Unreachability Detection
2278 * At this point, the destination of the packet must be a unicast
2279 * or an anycast address(i.e. not a multicast).
2282 IF_AFDATA_RLOCK(ifp);
2283 lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2284 IF_AFDATA_RUNLOCK(ifp);
2285 if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp)) {
2287 * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
2288 * the condition below is not very efficient. But we believe
2289 * it is tolerable, because this should be a rare case.
2291 lle = nd6_alloc(&dst->sin6_addr, 0, ifp);
2293 char ip6buf[INET6_ADDRSTRLEN];
2295 "nd6_output: can't allocate llinfo for %s "
2297 ip6_sprintf(ip6buf, &dst->sin6_addr), lle);
2302 IF_AFDATA_WLOCK(ifp);
2304 /* Prefer any existing entry over newly-created one */
2305 lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2306 if (lle_tmp == NULL)
2307 lltable_link_entry(LLTABLE6(ifp), lle);
2308 IF_AFDATA_WUNLOCK(ifp);
2309 if (lle_tmp != NULL) {
2310 lltable_free_entry(LLTABLE6(ifp), lle);
2317 if (!(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) {
2327 LLE_WLOCK_ASSERT(lle);
2330 * The first time we send a packet to a neighbor whose entry is
2331 * STALE, we have to change the state to DELAY and a sets a timer to
2332 * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do
2333 * neighbor unreachability detection on expiration.
2336 if (lle->ln_state == ND6_LLINFO_STALE)
2337 nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY);
2340 * If the neighbor cache entry has a state other than INCOMPLETE
2341 * (i.e. its link-layer address is already resolved), just
2344 if (lle->ln_state > ND6_LLINFO_INCOMPLETE) {
2345 if (flags & LLE_ADDRONLY) {
2346 lladdr = lle->ll_addr;
2347 ll_len = ifp->if_addrlen;
2349 lladdr = lle->r_linkdata;
2350 ll_len = lle->r_hdrlen;
2352 bcopy(lladdr, desten, ll_len);
2354 *pflags = lle->la_flags;
2364 * There is a neighbor cache entry, but no ethernet address
2365 * response yet. Append this latest packet to the end of the
2366 * packet queue in the mbuf. When it exceeds nd6_maxqueuelen,
2367 * the oldest packet in the queue will be removed.
2370 if (lle->la_hold != NULL) {
2371 struct mbuf *m_hold;
2375 for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){
2377 if (m_hold->m_nextpkt == NULL) {
2378 m_hold->m_nextpkt = m;
2382 while (i >= V_nd6_maxqueuelen) {
2383 m_hold = lle->la_hold;
2384 lle->la_hold = lle->la_hold->m_nextpkt;
2393 * If there has been no NS for the neighbor after entering the
2394 * INCOMPLETE state, send the first solicitation.
2395 * Note that for newly-created lle la_asked will be 0,
2396 * so we will transition from ND6_LLINFO_NOSTATE to
2397 * ND6_LLINFO_INCOMPLETE state here.
2401 if (lle->la_asked == 0) {
2404 psrc = nd6_llinfo_get_holdsrc(lle, &src);
2406 nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE);
2410 nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL);
2412 return (EWOULDBLOCK);
2416 * Do L2 address resolution for @sa_dst address. Stores found
2417 * address in @desten buffer. Copy of lle ln_flags can be also
2418 * saved in @pflags if @pflags is non-NULL.
2421 * - 0 on success (address copied to buffer).
2422 * - EWOULDBLOCK (no local error, but address is still unresolved)
2423 * - other errors (alloc failure, etc)
2426 nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
2427 char *desten, uint32_t *pflags)
2431 flags |= LLE_ADDRONLY;
2432 error = nd6_resolve_slow(ifp, flags, NULL,
2433 (const struct sockaddr_in6 *)dst, desten, pflags, NULL);
2438 nd6_flush_holdchain(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *chain,
2439 struct sockaddr_in6 *dst)
2441 struct mbuf *m, *m_head;
2442 struct ifnet *outifp;
2446 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2453 m_head = m_head->m_nextpkt;
2454 error = nd6_output_ifp(ifp, origifp, m, dst, NULL);
2459 * note that intermediate errors are blindly ignored
2465 nd6_need_cache(struct ifnet *ifp)
2468 * XXX: we currently do not make neighbor cache on any interface
2469 * other than ARCnet, Ethernet, FDDI and GIF.
2472 * - unidirectional tunnels needs no ND
2474 switch (ifp->if_type) {
2481 case IFT_INFINIBAND:
2483 case IFT_PROPVIRTUAL:
2491 * Add pernament ND6 link-layer record for given
2492 * interface address.
2494 * Very similar to IPv4 arp_ifinit(), but:
2495 * 1) IPv6 DAD is performed in different place
2496 * 2) It is called by IPv6 protocol stack in contrast to
2497 * arp_ifinit() which is typically called in SIOCSIFADDR
2498 * driver ioctl handler.
2502 nd6_add_ifa_lle(struct in6_ifaddr *ia)
2505 struct llentry *ln, *ln_tmp;
2506 struct sockaddr *dst;
2508 ifp = ia->ia_ifa.ifa_ifp;
2509 if (nd6_need_cache(ifp) == 0)
2512 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
2513 dst = (struct sockaddr *)&ia->ia_addr;
2514 ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst);
2518 IF_AFDATA_WLOCK(ifp);
2520 /* Unlink any entry if exists */
2521 ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst);
2523 lltable_unlink_entry(LLTABLE6(ifp), ln_tmp);
2524 lltable_link_entry(LLTABLE6(ifp), ln);
2525 IF_AFDATA_WUNLOCK(ifp);
2528 EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED);
2529 EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
2533 llentry_free(ln_tmp);
2539 * Removes either all lle entries for given @ia, or lle
2540 * corresponding to @ia address.
2543 nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all)
2545 struct sockaddr_in6 mask, addr;
2546 struct sockaddr *saddr, *smask;
2549 ifp = ia->ia_ifa.ifa_ifp;
2550 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
2551 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
2552 saddr = (struct sockaddr *)&addr;
2553 smask = (struct sockaddr *)&mask;
2556 lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC);
2558 lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr);
2562 clear_llinfo_pqueue(struct llentry *ln)
2564 struct mbuf *m_hold, *m_hold_next;
2566 for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) {
2567 m_hold_next = m_hold->m_nextpkt;
2574 static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS);
2575 static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS);
2577 SYSCTL_DECL(_net_inet6_icmp6);
2578 SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
2579 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
2580 NULL, 0, nd6_sysctl_drlist, "S,in6_defrouter",
2581 "NDP default router list");
2582 SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
2583 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
2584 NULL, 0, nd6_sysctl_prlist, "S,in6_prefix",
2586 SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
2587 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
2588 SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer,
2589 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), "");
2592 nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS)
2594 struct in6_defrouter d;
2595 struct nd_defrouter *dr;
2598 if (req->newptr != NULL)
2601 error = sysctl_wire_old_buffer(req, 0);
2605 bzero(&d, sizeof(d));
2606 d.rtaddr.sin6_family = AF_INET6;
2607 d.rtaddr.sin6_len = sizeof(d.rtaddr);
2610 TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) {
2611 d.rtaddr.sin6_addr = dr->rtaddr;
2612 error = sa6_recoverscope(&d.rtaddr);
2615 d.flags = dr->raflags;
2616 d.rtlifetime = dr->rtlifetime;
2617 d.expire = dr->expire + (time_second - time_uptime);
2618 d.if_index = dr->ifp->if_index;
2619 error = SYSCTL_OUT(req, &d, sizeof(d));
2628 nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS)
2630 struct in6_prefix p;
2631 struct sockaddr_in6 s6;
2632 struct nd_prefix *pr;
2633 struct nd_pfxrouter *pfr;
2636 char ip6buf[INET6_ADDRSTRLEN];
2641 error = sysctl_wire_old_buffer(req, 0);
2645 bzero(&p, sizeof(p));
2646 p.origin = PR_ORIG_RA;
2647 bzero(&s6, sizeof(s6));
2648 s6.sin6_family = AF_INET6;
2649 s6.sin6_len = sizeof(s6);
2652 LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
2653 p.prefix = pr->ndpr_prefix;
2654 if (sa6_recoverscope(&p.prefix)) {
2655 log(LOG_ERR, "scope error in prefix list (%s)\n",
2656 ip6_sprintf(ip6buf, &p.prefix.sin6_addr));
2657 /* XXX: press on... */
2659 p.raflags = pr->ndpr_raf;
2660 p.prefixlen = pr->ndpr_plen;
2661 p.vltime = pr->ndpr_vltime;
2662 p.pltime = pr->ndpr_pltime;
2663 p.if_index = pr->ndpr_ifp->if_index;
2664 if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
2667 /* XXX: we assume time_t is signed. */
2669 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
2670 if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate)
2671 p.expire = pr->ndpr_lastupdate +
2673 (time_second - time_uptime);
2675 p.expire = maxexpire;
2677 p.refcnt = pr->ndpr_refcnt;
2678 p.flags = pr->ndpr_stateflags;
2680 LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry)
2682 error = SYSCTL_OUT(req, &p, sizeof(p));
2685 LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
2686 s6.sin6_addr = pfr->router->rtaddr;
2687 if (sa6_recoverscope(&s6))
2689 "scope error in prefix list (%s)\n",
2690 ip6_sprintf(ip6buf, &pfr->router->rtaddr));
2691 error = SYSCTL_OUT(req, &s6, sizeof(s6));