xref: /freebsd/sys/netinet6/nd6.c (revision 0bbf244e9f9d34ae25b08a3f3d5a8d50c9958bd9)
1caf43b02SWarner Losh /*-
282cd038dSYoshinobu Inoue  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
382cd038dSYoshinobu Inoue  * All rights reserved.
482cd038dSYoshinobu Inoue  *
582cd038dSYoshinobu Inoue  * Redistribution and use in source and binary forms, with or without
682cd038dSYoshinobu Inoue  * modification, are permitted provided that the following conditions
782cd038dSYoshinobu Inoue  * are met:
882cd038dSYoshinobu Inoue  * 1. Redistributions of source code must retain the above copyright
982cd038dSYoshinobu Inoue  *    notice, this list of conditions and the following disclaimer.
1082cd038dSYoshinobu Inoue  * 2. Redistributions in binary form must reproduce the above copyright
1182cd038dSYoshinobu Inoue  *    notice, this list of conditions and the following disclaimer in the
1282cd038dSYoshinobu Inoue  *    documentation and/or other materials provided with the distribution.
1382cd038dSYoshinobu Inoue  * 3. Neither the name of the project nor the names of its contributors
1482cd038dSYoshinobu Inoue  *    may be used to endorse or promote products derived from this software
1582cd038dSYoshinobu Inoue  *    without specific prior written permission.
1682cd038dSYoshinobu Inoue  *
1782cd038dSYoshinobu Inoue  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
1882cd038dSYoshinobu Inoue  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1982cd038dSYoshinobu Inoue  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2082cd038dSYoshinobu Inoue  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
2182cd038dSYoshinobu Inoue  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2282cd038dSYoshinobu Inoue  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2382cd038dSYoshinobu Inoue  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2482cd038dSYoshinobu Inoue  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2582cd038dSYoshinobu Inoue  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2682cd038dSYoshinobu Inoue  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2782cd038dSYoshinobu Inoue  * SUCH DAMAGE.
28b48287a3SDavid E. O'Brien  *
29b48287a3SDavid E. O'Brien  *	$KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $
3082cd038dSYoshinobu Inoue  */
3182cd038dSYoshinobu Inoue 
32b48287a3SDavid E. O'Brien #include <sys/cdefs.h>
33b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$");
34b48287a3SDavid E. O'Brien 
35686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h"
36686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h"
37686cdd19SJun-ichiro itojun Hagino 
3882cd038dSYoshinobu Inoue #include <sys/param.h>
3982cd038dSYoshinobu Inoue #include <sys/systm.h>
4033841545SHajimu UMEMOTO #include <sys/callout.h>
4182cd038dSYoshinobu Inoue #include <sys/malloc.h>
4282cd038dSYoshinobu Inoue #include <sys/mbuf.h>
4382cd038dSYoshinobu Inoue #include <sys/socket.h>
4482cd038dSYoshinobu Inoue #include <sys/sockio.h>
4582cd038dSYoshinobu Inoue #include <sys/time.h>
4682cd038dSYoshinobu Inoue #include <sys/kernel.h>
47686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h>
4882cd038dSYoshinobu Inoue #include <sys/errno.h>
4982cd038dSYoshinobu Inoue #include <sys/syslog.h>
506e6b3f7cSQing Li #include <sys/lock.h>
516e6b3f7cSQing Li #include <sys/rwlock.h>
5282cd038dSYoshinobu Inoue #include <sys/queue.h>
5357f60867SMark Johnston #include <sys/sdt.h>
5433841545SHajimu UMEMOTO #include <sys/sysctl.h>
5582cd038dSYoshinobu Inoue 
5682cd038dSYoshinobu Inoue #include <net/if.h>
5776039bc8SGleb Smirnoff #include <net/if_var.h>
5831b3783cSHajimu UMEMOTO #include <net/if_arc.h>
5982cd038dSYoshinobu Inoue #include <net/if_dl.h>
6082cd038dSYoshinobu Inoue #include <net/if_types.h>
612049fdeeSMatthew N. Dodd #include <net/iso88025.h>
628e5fd461SMatthew N. Dodd #include <net/fddi.h>
6382cd038dSYoshinobu Inoue #include <net/route.h>
644b79449eSBjoern A. Zeeb #include <net/vnet.h>
6582cd038dSYoshinobu Inoue 
6682cd038dSYoshinobu Inoue #include <netinet/in.h>
6757f60867SMark Johnston #include <netinet/in_kdtrace.h>
686e6b3f7cSQing Li #include <net/if_llatbl.h>
6982cd038dSYoshinobu Inoue #include <netinet/if_ether.h>
7082cd038dSYoshinobu Inoue #include <netinet6/in6_var.h>
71686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h>
7282cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h>
73a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h>
7482cd038dSYoshinobu Inoue #include <netinet6/nd6.h>
75a283298cSHiroki Sato #include <netinet6/in6_ifattach.h>
76686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h>
771db8d1f8SAna Kukec #include <netinet6/send.h>
7882cd038dSYoshinobu Inoue 
79743eee66SSUZUKI Shinsuke #include <sys/limits.h>
80743eee66SSUZUKI Shinsuke 
81aed55708SRobert Watson #include <security/mac/mac_framework.h>
82aed55708SRobert Watson 
8382cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */
8482cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */
8582cd038dSYoshinobu Inoue 
8647e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s))
8782cd038dSYoshinobu Inoue 
885e0a6f31SMark Johnston MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
895e0a6f31SMark Johnston 
9082cea7e6SBjoern A. Zeeb /* timer values */
9182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune)	= 1;	/* walk list every 1 seconds */
9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay)	= 5;	/* delay first probe time 5 second */
9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries)	= 3;	/* maximum unicast query */
9482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries)	= 3;	/* maximum multicast query */
9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1;	/* use loopback interface for
9682cea7e6SBjoern A. Zeeb 					 * local traffic */
9782cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer)	= (60 * 60 * 24); /* 1 day: garbage
9882cea7e6SBjoern A. Zeeb 					 * collection timer */
99686cdd19SJun-ichiro itojun Hagino 
100686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */
1013e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxndopt) = 10; /* max # of ND options allowed */
10282cea7e6SBjoern A. Zeeb 
10382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0;	/* max # of subsequent upper
10482cea7e6SBjoern A. Zeeb 					 * layer hints */
1053e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
10682cea7e6SBjoern A. Zeeb 					 * ND entries */
1071e77c105SRobert Watson #define	V_nd6_maxndopt			VNET(nd6_maxndopt)
1081e77c105SRobert Watson #define	V_nd6_maxqueuelen		VNET(nd6_maxqueuelen)
109686cdd19SJun-ichiro itojun Hagino 
11082cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG
11182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1;
11282cea7e6SBjoern A. Zeeb #else
11382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0;
11482cea7e6SBjoern A. Zeeb #endif
11533841545SHajimu UMEMOTO 
1164fb3a820SAlexander V. Chernikov static eventhandler_tag lle_event_eh, iflladdr_event_eh;
11730aee131SAndrey V. Elsukov 
118eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter);
119eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix);
1204de485feSMark Johnston VNET_DEFINE(struct rwlock, nd6_lock);
12182cd038dSYoshinobu Inoue 
12282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL;
1231e77c105SRobert Watson #define	V_nd6_recalc_reachtm_interval	VNET(nd6_recalc_reachtm_interval)
12444e33a07SMarko Zec 
1251db8d1f8SAna Kukec int	(*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
1261db8d1f8SAna Kukec 
127f0316e1aSAlexander V. Chernikov static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *,
1286f56329aSXin LI 	struct ifnet *);
1299233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *);
1309233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *);
1319233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *);
132435bece4SMark Johnston static void nd6_free(struct llentry **, int);
13317a03656SEric van Gyzen static void nd6_free_redirect(const struct llentry *);
1349233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *);
1359b420b3dSAlexander V. Chernikov static void nd6_llinfo_settimer_locked(struct llentry *, long);
1366e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *);
137f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
1384fb3a820SAlexander V. Chernikov static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *,
1396d768226SGeorge V. Neville-Neil     const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **);
1401fe201c3SAlexander V. Chernikov static int nd6_need_cache(struct ifnet *);
1411fe201c3SAlexander V. Chernikov 
14233841545SHajimu UMEMOTO 
1433e288e62SDimitry Andric static VNET_DEFINE(struct callout, nd6_slowtimo_ch);
1441e77c105SRobert Watson #define	V_nd6_slowtimo_ch		VNET(nd6_slowtimo_ch)
145eddfbb76SRobert Watson 
146eddfbb76SRobert Watson VNET_DEFINE(struct callout, nd6_timer_ch);
1479901091eSBjoern A. Zeeb #define	V_nd6_timer_ch			VNET(nd6_timer_ch)
148eddfbb76SRobert Watson 
14930aee131SAndrey V. Elsukov static void
15030aee131SAndrey V. Elsukov nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
15130aee131SAndrey V. Elsukov {
15230aee131SAndrey V. Elsukov 	struct rt_addrinfo rtinfo;
153314294deSAlexander V. Chernikov 	struct sockaddr_in6 dst;
15430aee131SAndrey V. Elsukov 	struct sockaddr_dl gw;
15530aee131SAndrey V. Elsukov 	struct ifnet *ifp;
15630aee131SAndrey V. Elsukov 	int type;
15730aee131SAndrey V. Elsukov 
15830aee131SAndrey V. Elsukov 	LLE_WLOCK_ASSERT(lle);
15930aee131SAndrey V. Elsukov 
160314294deSAlexander V. Chernikov 	if (lltable_get_af(lle->lle_tbl) != AF_INET6)
161314294deSAlexander V. Chernikov 		return;
162314294deSAlexander V. Chernikov 
16330aee131SAndrey V. Elsukov 	switch (evt) {
16430aee131SAndrey V. Elsukov 	case LLENTRY_RESOLVED:
16530aee131SAndrey V. Elsukov 		type = RTM_ADD;
16630aee131SAndrey V. Elsukov 		KASSERT(lle->la_flags & LLE_VALID,
16730aee131SAndrey V. Elsukov 		    ("%s: %p resolved but not valid?", __func__, lle));
16830aee131SAndrey V. Elsukov 		break;
16930aee131SAndrey V. Elsukov 	case LLENTRY_EXPIRED:
17030aee131SAndrey V. Elsukov 		type = RTM_DELETE;
17130aee131SAndrey V. Elsukov 		break;
17230aee131SAndrey V. Elsukov 	default:
17330aee131SAndrey V. Elsukov 		return;
17430aee131SAndrey V. Elsukov 	}
17530aee131SAndrey V. Elsukov 
176314294deSAlexander V. Chernikov 	ifp = lltable_get_ifp(lle->lle_tbl);
17730aee131SAndrey V. Elsukov 
17830aee131SAndrey V. Elsukov 	bzero(&dst, sizeof(dst));
17930aee131SAndrey V. Elsukov 	bzero(&gw, sizeof(gw));
18030aee131SAndrey V. Elsukov 	bzero(&rtinfo, sizeof(rtinfo));
181314294deSAlexander V. Chernikov 	lltable_fill_sa_entry(lle, (struct sockaddr *)&dst);
18230aee131SAndrey V. Elsukov 	dst.sin6_scope_id = in6_getscopezone(ifp,
183314294deSAlexander V. Chernikov 	    in6_addrscope(&dst.sin6_addr));
18430aee131SAndrey V. Elsukov 	gw.sdl_len = sizeof(struct sockaddr_dl);
18530aee131SAndrey V. Elsukov 	gw.sdl_family = AF_LINK;
18630aee131SAndrey V. Elsukov 	gw.sdl_alen = ifp->if_addrlen;
18730aee131SAndrey V. Elsukov 	gw.sdl_index = ifp->if_index;
18830aee131SAndrey V. Elsukov 	gw.sdl_type = ifp->if_type;
18930aee131SAndrey V. Elsukov 	if (evt == LLENTRY_RESOLVED)
1904fb3a820SAlexander V. Chernikov 		bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen);
19130aee131SAndrey V. Elsukov 	rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst;
19230aee131SAndrey V. Elsukov 	rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw;
19330aee131SAndrey V. Elsukov 	rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY;
19430aee131SAndrey V. Elsukov 	rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | (
19530aee131SAndrey V. Elsukov 	    type == RTM_ADD ? RTF_UP: 0), 0, RT_DEFAULT_FIB);
19630aee131SAndrey V. Elsukov }
19730aee131SAndrey V. Elsukov 
1984fb3a820SAlexander V. Chernikov /*
1994fb3a820SAlexander V. Chernikov  * A handler for interface link layer address change event.
2004fb3a820SAlexander V. Chernikov  */
2014fb3a820SAlexander V. Chernikov static void
2024fb3a820SAlexander V. Chernikov nd6_iflladdr(void *arg __unused, struct ifnet *ifp)
2034fb3a820SAlexander V. Chernikov {
2044fb3a820SAlexander V. Chernikov 
2054fb3a820SAlexander V. Chernikov 	lltable_update_ifaddr(LLTABLE6(ifp));
2064fb3a820SAlexander V. Chernikov }
2074fb3a820SAlexander V. Chernikov 
20882cd038dSYoshinobu Inoue void
2091272577eSXin LI nd6_init(void)
21082cd038dSYoshinobu Inoue {
21182cd038dSYoshinobu Inoue 
2124de485feSMark Johnston 	rw_init(&V_nd6_lock, "nd6");
2134de485feSMark Johnston 
21444e33a07SMarko Zec 	LIST_INIT(&V_nd_prefix);
21544e33a07SMarko Zec 
216686cdd19SJun-ichiro itojun Hagino 	/* initialization of the default router list */
217603724d3SBjoern A. Zeeb 	TAILQ_INIT(&V_nd_defrouter);
21882cea7e6SBjoern A. Zeeb 
2199901091eSBjoern A. Zeeb 	/* Start timers. */
220603724d3SBjoern A. Zeeb 	callout_init(&V_nd6_slowtimo_ch, 0);
221603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
222f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
223d6ad6a86SMark Johnston 
2249901091eSBjoern A. Zeeb 	callout_init(&V_nd6_timer_ch, 0);
2259901091eSBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet);
2269901091eSBjoern A. Zeeb 
227d6ad6a86SMark Johnston 	nd6_dad_init();
2284fb3a820SAlexander V. Chernikov 	if (IS_DEFAULT_VNET(curvnet)) {
22930aee131SAndrey V. Elsukov 		lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
23030aee131SAndrey V. Elsukov 		    NULL, EVENTHANDLER_PRI_ANY);
2314fb3a820SAlexander V. Chernikov 		iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event,
2324fb3a820SAlexander V. Chernikov 		    nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
2334fb3a820SAlexander V. Chernikov 	}
23482cd038dSYoshinobu Inoue }
23582cd038dSYoshinobu Inoue 
236bc29160dSMarko Zec #ifdef VIMAGE
237bc29160dSMarko Zec void
238bc29160dSMarko Zec nd6_destroy()
239bc29160dSMarko Zec {
240bc29160dSMarko Zec 
241bc29160dSMarko Zec 	callout_drain(&V_nd6_slowtimo_ch);
242bc29160dSMarko Zec 	callout_drain(&V_nd6_timer_ch);
2434fb3a820SAlexander V. Chernikov 	if (IS_DEFAULT_VNET(curvnet)) {
24430aee131SAndrey V. Elsukov 		EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
2454fb3a820SAlexander V. Chernikov 		EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh);
2464fb3a820SAlexander V. Chernikov 	}
2474de485feSMark Johnston 	rw_destroy(&V_nd6_lock);
248bc29160dSMarko Zec }
249bc29160dSMarko Zec #endif
250bc29160dSMarko Zec 
25131b1bfe1SHajimu UMEMOTO struct nd_ifinfo *
2521272577eSXin LI nd6_ifattach(struct ifnet *ifp)
25382cd038dSYoshinobu Inoue {
25431b1bfe1SHajimu UMEMOTO 	struct nd_ifinfo *nd;
25582cd038dSYoshinobu Inoue 
256fc315641SMark Johnston 	nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO);
25731b1bfe1SHajimu UMEMOTO 	nd->initialized = 1;
25882cd038dSYoshinobu Inoue 
25931b1bfe1SHajimu UMEMOTO 	nd->chlim = IPV6_DEFHLIM;
26031b1bfe1SHajimu UMEMOTO 	nd->basereachable = REACHABLE_TIME;
26131b1bfe1SHajimu UMEMOTO 	nd->reachable = ND_COMPUTE_RTIME(nd->basereachable);
26231b1bfe1SHajimu UMEMOTO 	nd->retrans = RETRANS_TIMER;
263a283298cSHiroki Sato 
264a283298cSHiroki Sato 	nd->flags = ND6_IFF_PERFORMNUD;
265a283298cSHiroki Sato 
266af805644SHiroki Sato 	/* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL.
267af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by
268af805644SHiroki Sato 	 * default regardless of the V_ip6_auto_linklocal configuration to
269af805644SHiroki Sato 	 * give a reasonable default behavior.
270af805644SHiroki Sato 	 */
271af805644SHiroki Sato 	if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) ||
272af805644SHiroki Sato 	    (ifp->if_flags & IFF_LOOPBACK))
273a283298cSHiroki Sato 		nd->flags |= ND6_IFF_AUTO_LINKLOCAL;
274af805644SHiroki Sato 	/*
275af805644SHiroki Sato 	 * A loopback interface does not need to accept RTADV.
276af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by
277af805644SHiroki Sato 	 * default regardless of the V_ip6_accept_rtadv configuration to
278af805644SHiroki Sato 	 * prevent the interface from accepting RA messages arrived
279af805644SHiroki Sato 	 * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV.
280af805644SHiroki Sato 	 */
281af805644SHiroki Sato 	if (V_ip6_accept_rtadv &&
282af805644SHiroki Sato 	    !(ifp->if_flags & IFF_LOOPBACK) &&
283af805644SHiroki Sato 	    (ifp->if_type != IFT_BRIDGE))
284a283298cSHiroki Sato 			nd->flags |= ND6_IFF_ACCEPT_RTADV;
285e7fa8d0aSHiroki Sato 	if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK))
286e7fa8d0aSHiroki Sato 		nd->flags |= ND6_IFF_NO_RADR;
28731b1bfe1SHajimu UMEMOTO 
28831b1bfe1SHajimu UMEMOTO 	/* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */
28931b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, nd);
29031b1bfe1SHajimu UMEMOTO 
29131b1bfe1SHajimu UMEMOTO 	return nd;
29231b1bfe1SHajimu UMEMOTO }
29331b1bfe1SHajimu UMEMOTO 
29431b1bfe1SHajimu UMEMOTO void
29589856f7eSBjoern A. Zeeb nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd)
29631b1bfe1SHajimu UMEMOTO {
29789856f7eSBjoern A. Zeeb 	struct ifaddr *ifa, *next;
29889856f7eSBjoern A. Zeeb 
29989856f7eSBjoern A. Zeeb 	IF_ADDR_RLOCK(ifp);
30089856f7eSBjoern A. Zeeb 	TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
30189856f7eSBjoern A. Zeeb 		if (ifa->ifa_addr->sa_family != AF_INET6)
30289856f7eSBjoern A. Zeeb 			continue;
30389856f7eSBjoern A. Zeeb 
30489856f7eSBjoern A. Zeeb 		/* stop DAD processing */
30589856f7eSBjoern A. Zeeb 		nd6_dad_stop(ifa);
30689856f7eSBjoern A. Zeeb 	}
30789856f7eSBjoern A. Zeeb 	IF_ADDR_RUNLOCK(ifp);
30831b1bfe1SHajimu UMEMOTO 
30931b1bfe1SHajimu UMEMOTO 	free(nd, M_IP6NDP);
31082cd038dSYoshinobu Inoue }
31182cd038dSYoshinobu Inoue 
31282cd038dSYoshinobu Inoue /*
31382cd038dSYoshinobu Inoue  * Reset ND level link MTU. This function is called when the physical MTU
31482cd038dSYoshinobu Inoue  * changes, which means we might have to adjust the ND level MTU.
31582cd038dSYoshinobu Inoue  */
31682cd038dSYoshinobu Inoue void
3171272577eSXin LI nd6_setmtu(struct ifnet *ifp)
31882cd038dSYoshinobu Inoue {
3197e037c12SKristof Provost 	if (ifp->if_afdata[AF_INET6] == NULL)
3207e037c12SKristof Provost 		return;
32131b1bfe1SHajimu UMEMOTO 
32231b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, ND_IFINFO(ifp));
32331b1bfe1SHajimu UMEMOTO }
32431b1bfe1SHajimu UMEMOTO 
32531b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */
32631b1bfe1SHajimu UMEMOTO void
3271272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi)
32831b1bfe1SHajimu UMEMOTO {
32931b3783cSHajimu UMEMOTO 	u_int32_t omaxmtu;
33031b1bfe1SHajimu UMEMOTO 
33131b3783cSHajimu UMEMOTO 	omaxmtu = ndi->maxmtu;
33282cd038dSYoshinobu Inoue 
33382cd038dSYoshinobu Inoue 	switch (ifp->if_type) {
33431b3783cSHajimu UMEMOTO 	case IFT_ARCNET:
33531b3783cSHajimu UMEMOTO 		ndi->maxmtu = MIN(ARC_PHDS_MAXMTU, ifp->if_mtu); /* RFC2497 */
33682cd038dSYoshinobu Inoue 		break;
33782cd038dSYoshinobu Inoue 	case IFT_FDDI:
33831b3783cSHajimu UMEMOTO 		ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu); /* RFC2467 */
33982cd038dSYoshinobu Inoue 		break;
3402049fdeeSMatthew N. Dodd 	case IFT_ISO88025:
3412049fdeeSMatthew N. Dodd 		 ndi->maxmtu = MIN(ISO88025_MAX_MTU, ifp->if_mtu);
3422049fdeeSMatthew N. Dodd 		 break;
34382cd038dSYoshinobu Inoue 	default:
34482cd038dSYoshinobu Inoue 		ndi->maxmtu = ifp->if_mtu;
34582cd038dSYoshinobu Inoue 		break;
34682cd038dSYoshinobu Inoue 	}
34782cd038dSYoshinobu Inoue 
34882cd038dSYoshinobu Inoue 	/*
34931b3783cSHajimu UMEMOTO 	 * Decreasing the interface MTU under IPV6 minimum MTU may cause
35031b3783cSHajimu UMEMOTO 	 * undesirable situation.  We thus notify the operator of the change
35131b3783cSHajimu UMEMOTO 	 * explicitly.  The check for omaxmtu is necessary to restrict the
35231b3783cSHajimu UMEMOTO 	 * log to the case of changing the MTU, not initializing it.
35382cd038dSYoshinobu Inoue 	 */
35431b3783cSHajimu UMEMOTO 	if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) {
35531b3783cSHajimu UMEMOTO 		log(LOG_NOTICE, "nd6_setmtu0: "
35631b3783cSHajimu UMEMOTO 		    "new link MTU on %s (%lu) is too small for IPv6\n",
35731b3783cSHajimu UMEMOTO 		    if_name(ifp), (unsigned long)ndi->maxmtu);
35882cd038dSYoshinobu Inoue 	}
35931b3783cSHajimu UMEMOTO 
360603724d3SBjoern A. Zeeb 	if (ndi->maxmtu > V_in6_maxmtu)
36131b3783cSHajimu UMEMOTO 		in6_setmaxmtu(); /* check all interfaces just in case */
36231b3783cSHajimu UMEMOTO 
36382cd038dSYoshinobu Inoue }
36482cd038dSYoshinobu Inoue 
36582cd038dSYoshinobu Inoue void
3661272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts)
36782cd038dSYoshinobu Inoue {
36807eb2995SHajimu UMEMOTO 
36982cd038dSYoshinobu Inoue 	bzero(ndopts, sizeof(*ndopts));
37082cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)opt;
37182cd038dSYoshinobu Inoue 	ndopts->nd_opts_last
37282cd038dSYoshinobu Inoue 		= (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len);
37382cd038dSYoshinobu Inoue 
37482cd038dSYoshinobu Inoue 	if (icmp6len == 0) {
37582cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
37682cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
37782cd038dSYoshinobu Inoue 	}
37882cd038dSYoshinobu Inoue }
37982cd038dSYoshinobu Inoue 
38082cd038dSYoshinobu Inoue /*
38182cd038dSYoshinobu Inoue  * Take one ND option.
38282cd038dSYoshinobu Inoue  */
38382cd038dSYoshinobu Inoue struct nd_opt_hdr *
3841272577eSXin LI nd6_option(union nd_opts *ndopts)
38582cd038dSYoshinobu Inoue {
38682cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
38782cd038dSYoshinobu Inoue 	int olen;
38882cd038dSYoshinobu Inoue 
38939e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
39039e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
39139e19560SBjoern A. Zeeb 	    __func__));
3922ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
39382cd038dSYoshinobu Inoue 		return NULL;
39482cd038dSYoshinobu Inoue 	if (ndopts->nd_opts_done)
39582cd038dSYoshinobu Inoue 		return NULL;
39682cd038dSYoshinobu Inoue 
39782cd038dSYoshinobu Inoue 	nd_opt = ndopts->nd_opts_search;
39882cd038dSYoshinobu Inoue 
39919391949SKris Kennaway 	/* make sure nd_opt_len is inside the buffer */
40019391949SKris Kennaway 	if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
40119391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
40219391949SKris Kennaway 		return NULL;
40319391949SKris Kennaway 	}
40419391949SKris Kennaway 
40582cd038dSYoshinobu Inoue 	olen = nd_opt->nd_opt_len << 3;
40682cd038dSYoshinobu Inoue 	if (olen == 0) {
40782cd038dSYoshinobu Inoue 		/*
40882cd038dSYoshinobu Inoue 		 * Message validation requires that all included
40982cd038dSYoshinobu Inoue 		 * options have a length that is greater than zero.
41082cd038dSYoshinobu Inoue 		 */
41182cd038dSYoshinobu Inoue 		bzero(ndopts, sizeof(*ndopts));
41282cd038dSYoshinobu Inoue 		return NULL;
41382cd038dSYoshinobu Inoue 	}
41482cd038dSYoshinobu Inoue 
41582cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
41619391949SKris Kennaway 	if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
41719391949SKris Kennaway 		/* option overruns the end of buffer, invalid */
41819391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
41919391949SKris Kennaway 		return NULL;
42019391949SKris Kennaway 	} else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
42119391949SKris Kennaway 		/* reached the end of options chain */
42282cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
42382cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
42482cd038dSYoshinobu Inoue 	}
42582cd038dSYoshinobu Inoue 	return nd_opt;
42682cd038dSYoshinobu Inoue }
42782cd038dSYoshinobu Inoue 
42882cd038dSYoshinobu Inoue /*
42982cd038dSYoshinobu Inoue  * Parse multiple ND options.
43082cd038dSYoshinobu Inoue  * This function is much easier to use, for ND routines that do not need
43182cd038dSYoshinobu Inoue  * multiple options of the same type.
43282cd038dSYoshinobu Inoue  */
43382cd038dSYoshinobu Inoue int
4341272577eSXin LI nd6_options(union nd_opts *ndopts)
43582cd038dSYoshinobu Inoue {
43682cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
43782cd038dSYoshinobu Inoue 	int i = 0;
43882cd038dSYoshinobu Inoue 
43939e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
44039e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
44139e19560SBjoern A. Zeeb 	    __func__));
4422ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
44382cd038dSYoshinobu Inoue 		return 0;
44482cd038dSYoshinobu Inoue 
44582cd038dSYoshinobu Inoue 	while (1) {
44682cd038dSYoshinobu Inoue 		nd_opt = nd6_option(ndopts);
4472ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
44882cd038dSYoshinobu Inoue 			/*
44982cd038dSYoshinobu Inoue 			 * Message validation requires that all included
45082cd038dSYoshinobu Inoue 			 * options have a length that is greater than zero.
45182cd038dSYoshinobu Inoue 			 */
452e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_badopt);
45382cd038dSYoshinobu Inoue 			bzero(ndopts, sizeof(*ndopts));
45482cd038dSYoshinobu Inoue 			return -1;
45582cd038dSYoshinobu Inoue 		}
45682cd038dSYoshinobu Inoue 
4572ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL)
45882cd038dSYoshinobu Inoue 			goto skip1;
45982cd038dSYoshinobu Inoue 
46082cd038dSYoshinobu Inoue 		switch (nd_opt->nd_opt_type) {
46182cd038dSYoshinobu Inoue 		case ND_OPT_SOURCE_LINKADDR:
46282cd038dSYoshinobu Inoue 		case ND_OPT_TARGET_LINKADDR:
46382cd038dSYoshinobu Inoue 		case ND_OPT_MTU:
46482cd038dSYoshinobu Inoue 		case ND_OPT_REDIRECTED_HEADER:
46511d8451dSHiroki Sato 		case ND_OPT_NONCE:
46682cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
46733841545SHajimu UMEMOTO 				nd6log((LOG_INFO,
46833841545SHajimu UMEMOTO 				    "duplicated ND6 option found (type=%d)\n",
46933841545SHajimu UMEMOTO 				    nd_opt->nd_opt_type));
47082cd038dSYoshinobu Inoue 				/* XXX bark? */
47182cd038dSYoshinobu Inoue 			} else {
47282cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
47382cd038dSYoshinobu Inoue 					= nd_opt;
47482cd038dSYoshinobu Inoue 			}
47582cd038dSYoshinobu Inoue 			break;
47682cd038dSYoshinobu Inoue 		case ND_OPT_PREFIX_INFORMATION:
47782cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) {
47882cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
47982cd038dSYoshinobu Inoue 					= nd_opt;
48082cd038dSYoshinobu Inoue 			}
48182cd038dSYoshinobu Inoue 			ndopts->nd_opts_pi_end =
48282cd038dSYoshinobu Inoue 				(struct nd_opt_prefix_info *)nd_opt;
48382cd038dSYoshinobu Inoue 			break;
484abbe8356SBjoern A. Zeeb 		/* What about ND_OPT_ROUTE_INFO? RFC 4191 */
485abbe8356SBjoern A. Zeeb 		case ND_OPT_RDNSS:	/* RFC 6106 */
486abbe8356SBjoern A. Zeeb 		case ND_OPT_DNSSL:	/* RFC 6106 */
487abbe8356SBjoern A. Zeeb 			/*
488abbe8356SBjoern A. Zeeb 			 * Silently ignore options we know and do not care about
489abbe8356SBjoern A. Zeeb 			 * in the kernel.
490abbe8356SBjoern A. Zeeb 			 */
491abbe8356SBjoern A. Zeeb 			break;
49282cd038dSYoshinobu Inoue 		default:
49382cd038dSYoshinobu Inoue 			/*
49482cd038dSYoshinobu Inoue 			 * Unknown options must be silently ignored,
495a4641f4eSPedro F. Giffuni 			 * to accommodate future extension to the protocol.
49682cd038dSYoshinobu Inoue 			 */
49733841545SHajimu UMEMOTO 			nd6log((LOG_DEBUG,
49882cd038dSYoshinobu Inoue 			    "nd6_options: unsupported option %d - "
49933841545SHajimu UMEMOTO 			    "option ignored\n", nd_opt->nd_opt_type));
50082cd038dSYoshinobu Inoue 		}
50182cd038dSYoshinobu Inoue 
50282cd038dSYoshinobu Inoue skip1:
50382cd038dSYoshinobu Inoue 		i++;
504603724d3SBjoern A. Zeeb 		if (i > V_nd6_maxndopt) {
505e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_toomanyopt);
50633841545SHajimu UMEMOTO 			nd6log((LOG_INFO, "too many loop in nd opt\n"));
50782cd038dSYoshinobu Inoue 			break;
50882cd038dSYoshinobu Inoue 		}
50982cd038dSYoshinobu Inoue 
51082cd038dSYoshinobu Inoue 		if (ndopts->nd_opts_done)
51182cd038dSYoshinobu Inoue 			break;
51282cd038dSYoshinobu Inoue 	}
51382cd038dSYoshinobu Inoue 
51482cd038dSYoshinobu Inoue 	return 0;
51582cd038dSYoshinobu Inoue }
51682cd038dSYoshinobu Inoue 
51782cd038dSYoshinobu Inoue /*
518743eee66SSUZUKI Shinsuke  * ND6 timer routine to handle ND6 entries
51982cd038dSYoshinobu Inoue  */
5209b420b3dSAlexander V. Chernikov static void
5216e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick)
522743eee66SSUZUKI Shinsuke {
523ef8d671cSHajimu UMEMOTO 	int canceled;
524ef8d671cSHajimu UMEMOTO 
525e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
526e6950476SBjoern A. Zeeb 
527743eee66SSUZUKI Shinsuke 	if (tick < 0) {
5286e6b3f7cSQing Li 		ln->la_expire = 0;
529743eee66SSUZUKI Shinsuke 		ln->ln_ntick = 0;
5300447c136SAlexander V. Chernikov 		canceled = callout_stop(&ln->lle_timer);
531743eee66SSUZUKI Shinsuke 	} else {
5327d26db17SHiroki Sato 		ln->la_expire = time_uptime + tick / hz;
5336e6b3f7cSQing Li 		LLE_ADDREF(ln);
534743eee66SSUZUKI Shinsuke 		if (tick > INT_MAX) {
535743eee66SSUZUKI Shinsuke 			ln->ln_ntick = tick - INT_MAX;
5360447c136SAlexander V. Chernikov 			canceled = callout_reset(&ln->lle_timer, INT_MAX,
537743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
538743eee66SSUZUKI Shinsuke 		} else {
539743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
5400447c136SAlexander V. Chernikov 			canceled = callout_reset(&ln->lle_timer, tick,
541743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
542743eee66SSUZUKI Shinsuke 		}
543743eee66SSUZUKI Shinsuke 	}
5447c4676ddSRandall Stewart 	if (canceled > 0)
545ef8d671cSHajimu UMEMOTO 		LLE_REMREF(ln);
546743eee66SSUZUKI Shinsuke }
54782cd038dSYoshinobu Inoue 
54826deb882SAlexander V. Chernikov /*
54926deb882SAlexander V. Chernikov  * Gets source address of the first packet in hold queue
55026deb882SAlexander V. Chernikov  * and stores it in @src.
55126deb882SAlexander V. Chernikov  * Returns pointer to @src (if hold queue is not empty) or NULL.
55226deb882SAlexander V. Chernikov  *
553c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
55426deb882SAlexander V. Chernikov  */
555c0b8aeaeSAlexander V. Chernikov static __noinline struct in6_addr *
55626deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src)
55726deb882SAlexander V. Chernikov {
55826deb882SAlexander V. Chernikov 	struct ip6_hdr hdr;
55926deb882SAlexander V. Chernikov 	struct mbuf *m;
56026deb882SAlexander V. Chernikov 
56126deb882SAlexander V. Chernikov 	if (ln->la_hold == NULL)
56226deb882SAlexander V. Chernikov 		return (NULL);
56326deb882SAlexander V. Chernikov 
56426deb882SAlexander V. Chernikov 	/*
56526deb882SAlexander V. Chernikov 	 * assume every packet in la_hold has the same IP header
56626deb882SAlexander V. Chernikov 	 */
56726deb882SAlexander V. Chernikov 	m = ln->la_hold;
56806a60e4bSAlexander V. Chernikov 	if (sizeof(hdr) > m->m_len)
56926deb882SAlexander V. Chernikov 		return (NULL);
57026deb882SAlexander V. Chernikov 
57126deb882SAlexander V. Chernikov 	m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
57226deb882SAlexander V. Chernikov 	*src = hdr.ip6_src;
57326deb882SAlexander V. Chernikov 
57426deb882SAlexander V. Chernikov 	return (src);
57526deb882SAlexander V. Chernikov }
57626deb882SAlexander V. Chernikov 
577aa5f023eSAlexander V. Chernikov /*
57812cb7521SAlexander V. Chernikov  * Checks if we need to switch from STALE state.
57912cb7521SAlexander V. Chernikov  *
58012cb7521SAlexander V. Chernikov  * RFC 4861 requires switching from STALE to DELAY state
58112cb7521SAlexander V. Chernikov  * on first packet matching entry, waiting V_nd6_delay and
58212cb7521SAlexander V. Chernikov  * transition to PROBE state (if upper layer confirmation was
58312cb7521SAlexander V. Chernikov  * not received).
58412cb7521SAlexander V. Chernikov  *
58512cb7521SAlexander V. Chernikov  * This code performs a bit differently:
58612cb7521SAlexander V. Chernikov  * On packet hit we don't change state (but desired state
58712cb7521SAlexander V. Chernikov  * can be guessed by control plane). However, after V_nd6_delay
58812cb7521SAlexander V. Chernikov  * seconds code will transition to PROBE state (so DELAY state
58912cb7521SAlexander V. Chernikov  * is kinda skipped in most situations).
59012cb7521SAlexander V. Chernikov  *
59112cb7521SAlexander V. Chernikov  * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so
59212cb7521SAlexander V. Chernikov  * we perform the following upon entering STALE state:
59312cb7521SAlexander V. Chernikov  *
59412cb7521SAlexander V. Chernikov  * 1) Arm timer to run each V_nd6_delay seconds to make sure that
59512cb7521SAlexander V. Chernikov  * if packet was transmitted at the start of given interval, we
59612cb7521SAlexander V. Chernikov  * would be able to switch to PROBE state in V_nd6_delay seconds
59712cb7521SAlexander V. Chernikov  * as user expects.
59812cb7521SAlexander V. Chernikov  *
59912cb7521SAlexander V. Chernikov  * 2) Reschedule timer until original V_nd6_gctimer expires keeping
60012cb7521SAlexander V. Chernikov  * lle in STALE state (remaining timer value stored in lle_remtime).
60112cb7521SAlexander V. Chernikov  *
60212cb7521SAlexander V. Chernikov  * 3) Reschedule timer if packet was transmitted less that V_nd6_delay
60312cb7521SAlexander V. Chernikov  * seconds ago.
60412cb7521SAlexander V. Chernikov  *
60512cb7521SAlexander V. Chernikov  * Returns non-zero value if the entry is still STALE (storing
60612cb7521SAlexander V. Chernikov  * the next timer interval in @pdelay).
60712cb7521SAlexander V. Chernikov  *
60812cb7521SAlexander V. Chernikov  * Returns zero value if original timer expired or we need to switch to
60912cb7521SAlexander V. Chernikov  * PROBE (store that in @do_switch variable).
61012cb7521SAlexander V. Chernikov  */
61112cb7521SAlexander V. Chernikov static int
61212cb7521SAlexander V. Chernikov nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch)
61312cb7521SAlexander V. Chernikov {
61412cb7521SAlexander V. Chernikov 	int nd_delay, nd_gctimer, r_skip_req;
61512cb7521SAlexander V. Chernikov 	time_t lle_hittime;
61612cb7521SAlexander V. Chernikov 	long delay;
61712cb7521SAlexander V. Chernikov 
61812cb7521SAlexander V. Chernikov 	*do_switch = 0;
61912cb7521SAlexander V. Chernikov 	nd_gctimer = V_nd6_gctimer;
62012cb7521SAlexander V. Chernikov 	nd_delay = V_nd6_delay;
62112cb7521SAlexander V. Chernikov 
62212cb7521SAlexander V. Chernikov 	LLE_REQ_LOCK(lle);
62312cb7521SAlexander V. Chernikov 	r_skip_req = lle->r_skip_req;
62412cb7521SAlexander V. Chernikov 	lle_hittime = lle->lle_hittime;
62512cb7521SAlexander V. Chernikov 	LLE_REQ_UNLOCK(lle);
62612cb7521SAlexander V. Chernikov 
62712cb7521SAlexander V. Chernikov 	if (r_skip_req > 0) {
62812cb7521SAlexander V. Chernikov 
62912cb7521SAlexander V. Chernikov 		/*
63012cb7521SAlexander V. Chernikov 		 * Nonzero r_skip_req value was set upon entering
63112cb7521SAlexander V. Chernikov 		 * STALE state. Since value was not changed, no
63212cb7521SAlexander V. Chernikov 		 * packets were passed using this lle. Ask for
63312cb7521SAlexander V. Chernikov 		 * timer reschedule and keep STALE state.
63412cb7521SAlexander V. Chernikov 		 */
63512cb7521SAlexander V. Chernikov 		delay = (long)(MIN(nd_gctimer, nd_delay));
63612cb7521SAlexander V. Chernikov 		delay *= hz;
63712cb7521SAlexander V. Chernikov 		if (lle->lle_remtime > delay)
63812cb7521SAlexander V. Chernikov 			lle->lle_remtime -= delay;
63912cb7521SAlexander V. Chernikov 		else {
64012cb7521SAlexander V. Chernikov 			delay = lle->lle_remtime;
64112cb7521SAlexander V. Chernikov 			lle->lle_remtime = 0;
64212cb7521SAlexander V. Chernikov 		}
64312cb7521SAlexander V. Chernikov 
64412cb7521SAlexander V. Chernikov 		if (delay == 0) {
64512cb7521SAlexander V. Chernikov 
64612cb7521SAlexander V. Chernikov 			/*
64712cb7521SAlexander V. Chernikov 			 * The original ng6_gctime timeout ended,
64812cb7521SAlexander V. Chernikov 			 * no more rescheduling.
64912cb7521SAlexander V. Chernikov 			 */
65012cb7521SAlexander V. Chernikov 			return (0);
65112cb7521SAlexander V. Chernikov 		}
65212cb7521SAlexander V. Chernikov 
65312cb7521SAlexander V. Chernikov 		*pdelay = delay;
65412cb7521SAlexander V. Chernikov 		return (1);
65512cb7521SAlexander V. Chernikov 	}
65612cb7521SAlexander V. Chernikov 
65712cb7521SAlexander V. Chernikov 	/*
65812cb7521SAlexander V. Chernikov 	 * Packet received. Verify timestamp
65912cb7521SAlexander V. Chernikov 	 */
66012cb7521SAlexander V. Chernikov 	delay = (long)(time_uptime - lle_hittime);
66112cb7521SAlexander V. Chernikov 	if (delay < nd_delay) {
66212cb7521SAlexander V. Chernikov 
66312cb7521SAlexander V. Chernikov 		/*
66412cb7521SAlexander V. Chernikov 		 * V_nd6_delay still not passed since the first
66512cb7521SAlexander V. Chernikov 		 * hit in STALE state.
66612cb7521SAlexander V. Chernikov 		 * Reshedule timer and return.
66712cb7521SAlexander V. Chernikov 		 */
66812cb7521SAlexander V. Chernikov 		*pdelay = (long)(nd_delay - delay) * hz;
66912cb7521SAlexander V. Chernikov 		return (1);
67012cb7521SAlexander V. Chernikov 	}
67112cb7521SAlexander V. Chernikov 
67212cb7521SAlexander V. Chernikov 	/* Request switching to probe */
67312cb7521SAlexander V. Chernikov 	*do_switch = 1;
67412cb7521SAlexander V. Chernikov 	return (0);
67512cb7521SAlexander V. Chernikov }
67612cb7521SAlexander V. Chernikov 
67712cb7521SAlexander V. Chernikov 
67812cb7521SAlexander V. Chernikov /*
679aa5f023eSAlexander V. Chernikov  * Switch @lle state to new state optionally arming timers.
680c0b8aeaeSAlexander V. Chernikov  *
681c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
682aa5f023eSAlexander V. Chernikov  */
683c0b8aeaeSAlexander V. Chernikov __noinline void
684aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(struct llentry *lle, int newstate)
685aa5f023eSAlexander V. Chernikov {
686aa5f023eSAlexander V. Chernikov 	struct ifnet *ifp;
68712cb7521SAlexander V. Chernikov 	int nd_gctimer, nd_delay;
68812cb7521SAlexander V. Chernikov 	long delay, remtime;
689aa5f023eSAlexander V. Chernikov 
690aa5f023eSAlexander V. Chernikov 	delay = 0;
69112cb7521SAlexander V. Chernikov 	remtime = 0;
692aa5f023eSAlexander V. Chernikov 
693aa5f023eSAlexander V. Chernikov 	switch (newstate) {
694aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_INCOMPLETE:
695aa5f023eSAlexander V. Chernikov 		ifp = lle->lle_tbl->llt_ifp;
696aa5f023eSAlexander V. Chernikov 		delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000;
697aa5f023eSAlexander V. Chernikov 		break;
698aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_REACHABLE:
699aa5f023eSAlexander V. Chernikov 		if (!ND6_LLINFO_PERMANENT(lle)) {
700aa5f023eSAlexander V. Chernikov 			ifp = lle->lle_tbl->llt_ifp;
701aa5f023eSAlexander V. Chernikov 			delay = (long)ND_IFINFO(ifp)->reachable * hz;
702aa5f023eSAlexander V. Chernikov 		}
703aa5f023eSAlexander V. Chernikov 		break;
704aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_STALE:
70512cb7521SAlexander V. Chernikov 
70612cb7521SAlexander V. Chernikov 		/*
70712cb7521SAlexander V. Chernikov 		 * Notify fast path that we want to know if any packet
70812cb7521SAlexander V. Chernikov 		 * is transmitted by setting r_skip_req.
70912cb7521SAlexander V. Chernikov 		 */
71012cb7521SAlexander V. Chernikov 		LLE_REQ_LOCK(lle);
71112cb7521SAlexander V. Chernikov 		lle->r_skip_req = 1;
71212cb7521SAlexander V. Chernikov 		LLE_REQ_UNLOCK(lle);
71312cb7521SAlexander V. Chernikov 		nd_delay = V_nd6_delay;
71412cb7521SAlexander V. Chernikov 		nd_gctimer = V_nd6_gctimer;
71512cb7521SAlexander V. Chernikov 
71612cb7521SAlexander V. Chernikov 		delay = (long)(MIN(nd_gctimer, nd_delay)) * hz;
71712cb7521SAlexander V. Chernikov 		remtime = (long)nd_gctimer * hz - delay;
718aa5f023eSAlexander V. Chernikov 		break;
719aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_DELAY:
720aa5f023eSAlexander V. Chernikov 		lle->la_asked = 0;
721aa5f023eSAlexander V. Chernikov 		delay = (long)V_nd6_delay * hz;
722aa5f023eSAlexander V. Chernikov 		break;
723aa5f023eSAlexander V. Chernikov 	}
724aa5f023eSAlexander V. Chernikov 
725aa5f023eSAlexander V. Chernikov 	if (delay > 0)
726aa5f023eSAlexander V. Chernikov 		nd6_llinfo_settimer_locked(lle, delay);
727aa5f023eSAlexander V. Chernikov 
72812cb7521SAlexander V. Chernikov 	lle->lle_remtime = remtime;
729aa5f023eSAlexander V. Chernikov 	lle->ln_state = newstate;
730aa5f023eSAlexander V. Chernikov }
731aa5f023eSAlexander V. Chernikov 
732c0b8aeaeSAlexander V. Chernikov /*
733c0b8aeaeSAlexander V. Chernikov  * Timer-dependent part of nd state machine.
734c0b8aeaeSAlexander V. Chernikov  *
735c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
736c0b8aeaeSAlexander V. Chernikov  */
737c0b8aeaeSAlexander V. Chernikov static __noinline void
7381272577eSXin LI nd6_llinfo_timer(void *arg)
739743eee66SSUZUKI Shinsuke {
7406e6b3f7cSQing Li 	struct llentry *ln;
74126deb882SAlexander V. Chernikov 	struct in6_addr *dst, *pdst, *psrc, src;
742743eee66SSUZUKI Shinsuke 	struct ifnet *ifp;
743435bece4SMark Johnston 	struct nd_ifinfo *ndi;
74412cb7521SAlexander V. Chernikov 	int do_switch, send_ns;
74512cb7521SAlexander V. Chernikov 	long delay;
74682cd038dSYoshinobu Inoue 
74719291ab3SBjoern A. Zeeb 	KASSERT(arg != NULL, ("%s: arg NULL", __func__));
7486e6b3f7cSQing Li 	ln = (struct llentry *)arg;
749435bece4SMark Johnston 	ifp = lltable_get_ifp(ln->lle_tbl);
750435bece4SMark Johnston 	CURVNET_SET(ifp->if_vnet);
751435bece4SMark Johnston 
752435bece4SMark Johnston 	ND6_RLOCK();
7532575fbb8SRandall Stewart 	LLE_WLOCK(ln);
7540447c136SAlexander V. Chernikov 	if (callout_pending(&ln->lle_timer)) {
7552575fbb8SRandall Stewart 		/*
7562575fbb8SRandall Stewart 		 * Here we are a bit odd here in the treatment of
7572575fbb8SRandall Stewart 		 * active/pending. If the pending bit is set, it got
7582575fbb8SRandall Stewart 		 * rescheduled before I ran. The active
7592575fbb8SRandall Stewart 		 * bit we ignore, since if it was stopped
7602575fbb8SRandall Stewart 		 * in ll_tablefree() and was currently running
7612575fbb8SRandall Stewart 		 * it would have return 0 so the code would
7622575fbb8SRandall Stewart 		 * not have deleted it since the callout could
7632575fbb8SRandall Stewart 		 * not be stopped so we want to go through
7642575fbb8SRandall Stewart 		 * with the delete here now. If the callout
7652575fbb8SRandall Stewart 		 * was restarted, the pending bit will be back on and
7662575fbb8SRandall Stewart 		 * we just want to bail since the callout_reset would
7672575fbb8SRandall Stewart 		 * return 1 and our reference would have been removed
7682575fbb8SRandall Stewart 		 * by nd6_llinfo_settimer_locked above since canceled
7692575fbb8SRandall Stewart 		 * would have been 1.
7702575fbb8SRandall Stewart 		 */
7712575fbb8SRandall Stewart 		LLE_WUNLOCK(ln);
772435bece4SMark Johnston 		ND6_RUNLOCK();
773435bece4SMark Johnston 		CURVNET_RESTORE();
7742575fbb8SRandall Stewart 		return;
7752575fbb8SRandall Stewart 	}
77626deb882SAlexander V. Chernikov 	ndi = ND_IFINFO(ifp);
77726deb882SAlexander V. Chernikov 	send_ns = 0;
77826deb882SAlexander V. Chernikov 	dst = &ln->r_l3addr.addr6;
77926deb882SAlexander V. Chernikov 	pdst = dst;
78082cd038dSYoshinobu Inoue 
781743eee66SSUZUKI Shinsuke 	if (ln->ln_ntick > 0) {
782743eee66SSUZUKI Shinsuke 		if (ln->ln_ntick > INT_MAX) {
783743eee66SSUZUKI Shinsuke 			ln->ln_ntick -= INT_MAX;
784e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, INT_MAX);
785743eee66SSUZUKI Shinsuke 		} else {
786743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
787e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, ln->ln_ntick);
78882cd038dSYoshinobu Inoue 		}
7896e6b3f7cSQing Li 		goto done;
790743eee66SSUZUKI Shinsuke 	}
791743eee66SSUZUKI Shinsuke 
792287e3cb4SHajimu UMEMOTO 	if (ln->la_flags & LLE_STATIC) {
7936e6b3f7cSQing Li 		goto done;
7946e6b3f7cSQing Li 	}
79582cd038dSYoshinobu Inoue 
7966e6b3f7cSQing Li 	if (ln->la_flags & LLE_DELETED) {
797435bece4SMark Johnston 		nd6_free(&ln, 0);
7986e6b3f7cSQing Li 		goto done;
7996e6b3f7cSQing Li 	}
80082cd038dSYoshinobu Inoue 
80182cd038dSYoshinobu Inoue 	switch (ln->ln_state) {
80282cd038dSYoshinobu Inoue 	case ND6_LLINFO_INCOMPLETE:
8036e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_mmaxtries) {
8046e6b3f7cSQing Li 			ln->la_asked++;
80526deb882SAlexander V. Chernikov 			send_ns = 1;
80626deb882SAlexander V. Chernikov 			/* Send NS to multicast address */
80726deb882SAlexander V. Chernikov 			pdst = NULL;
80882cd038dSYoshinobu Inoue 		} else {
8096e6b3f7cSQing Li 			struct mbuf *m = ln->la_hold;
81082cd038dSYoshinobu Inoue 			if (m) {
81131d4137bSSUZUKI Shinsuke 				struct mbuf *m0;
81231d4137bSSUZUKI Shinsuke 
81382cd038dSYoshinobu Inoue 				/*
8146e6b3f7cSQing Li 				 * assuming every packet in la_hold has the
815e6950476SBjoern A. Zeeb 				 * same IP header.  Send error after unlock.
81682cd038dSYoshinobu Inoue 				 */
81731d4137bSSUZUKI Shinsuke 				m0 = m->m_nextpkt;
81831d4137bSSUZUKI Shinsuke 				m->m_nextpkt = NULL;
8196e6b3f7cSQing Li 				ln->la_hold = m0;
82031d4137bSSUZUKI Shinsuke 				clear_llinfo_pqueue(ln);
82182cd038dSYoshinobu Inoue 			}
822435bece4SMark Johnston 			nd6_free(&ln, 0);
823e6950476SBjoern A. Zeeb 			if (m != NULL)
824e6950476SBjoern A. Zeeb 				icmp6_error2(m, ICMP6_DST_UNREACH,
825e6950476SBjoern A. Zeeb 				    ICMP6_DST_UNREACH_ADDR, 0, ifp);
82682cd038dSYoshinobu Inoue 		}
82782cd038dSYoshinobu Inoue 		break;
82882cd038dSYoshinobu Inoue 	case ND6_LLINFO_REACHABLE:
829aa5f023eSAlexander V. Chernikov 		if (!ND6_LLINFO_PERMANENT(ln))
830aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
83182cd038dSYoshinobu Inoue 		break;
83233841545SHajimu UMEMOTO 
83333841545SHajimu UMEMOTO 	case ND6_LLINFO_STALE:
83412cb7521SAlexander V. Chernikov 		if (nd6_is_stale(ln, &delay, &do_switch) != 0) {
83512cb7521SAlexander V. Chernikov 
83612cb7521SAlexander V. Chernikov 			/*
83712cb7521SAlexander V. Chernikov 			 * No packet has used this entry and GC timeout
83812cb7521SAlexander V. Chernikov 			 * has not been passed. Reshedule timer and
83912cb7521SAlexander V. Chernikov 			 * return.
84012cb7521SAlexander V. Chernikov 			 */
84112cb7521SAlexander V. Chernikov 			nd6_llinfo_settimer_locked(ln, delay);
84212cb7521SAlexander V. Chernikov 			break;
84312cb7521SAlexander V. Chernikov 		}
84412cb7521SAlexander V. Chernikov 
84512cb7521SAlexander V. Chernikov 		if (do_switch == 0) {
84612cb7521SAlexander V. Chernikov 
84712cb7521SAlexander V. Chernikov 			/*
84812cb7521SAlexander V. Chernikov 			 * GC timer has ended and entry hasn't been used.
84912cb7521SAlexander V. Chernikov 			 * Run Garbage collector (RFC 4861, 5.3)
85012cb7521SAlexander V. Chernikov 			 */
851435bece4SMark Johnston 			if (!ND6_LLINFO_PERMANENT(ln))
852435bece4SMark Johnston 				nd6_free(&ln, 1);
85333841545SHajimu UMEMOTO 			break;
85412cb7521SAlexander V. Chernikov 		}
85512cb7521SAlexander V. Chernikov 
85612cb7521SAlexander V. Chernikov 		/* Entry has been used AND delay timer has ended. */
85712cb7521SAlexander V. Chernikov 
85812cb7521SAlexander V. Chernikov 		/* FALLTHROUGH */
85933841545SHajimu UMEMOTO 
86082cd038dSYoshinobu Inoue 	case ND6_LLINFO_DELAY:
861686cdd19SJun-ichiro itojun Hagino 		if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
862686cdd19SJun-ichiro itojun Hagino 			/* We need NUD */
8636e6b3f7cSQing Li 			ln->la_asked = 1;
864aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE);
86526deb882SAlexander V. Chernikov 			send_ns = 1;
866aa5f023eSAlexander V. Chernikov 		} else
867aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */
86882cd038dSYoshinobu Inoue 		break;
86982cd038dSYoshinobu Inoue 	case ND6_LLINFO_PROBE:
8706e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_umaxtries) {
8716e6b3f7cSQing Li 			ln->la_asked++;
87226deb882SAlexander V. Chernikov 			send_ns = 1;
87382cd038dSYoshinobu Inoue 		} else {
874435bece4SMark Johnston 			nd6_free(&ln, 0);
87582cd038dSYoshinobu Inoue 		}
87682cd038dSYoshinobu Inoue 		break;
877e6950476SBjoern A. Zeeb 	default:
878e6950476SBjoern A. Zeeb 		panic("%s: paths in a dark night can be confusing: %d",
879e6950476SBjoern A. Zeeb 		    __func__, ln->ln_state);
88082cd038dSYoshinobu Inoue 	}
8816e6b3f7cSQing Li done:
882435bece4SMark Johnston 	if (ln != NULL)
883435bece4SMark Johnston 		ND6_RUNLOCK();
88426deb882SAlexander V. Chernikov 	if (send_ns != 0) {
88526deb882SAlexander V. Chernikov 		nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
88626deb882SAlexander V. Chernikov 		psrc = nd6_llinfo_get_holdsrc(ln, &src);
88726deb882SAlexander V. Chernikov 		LLE_FREE_LOCKED(ln);
88826deb882SAlexander V. Chernikov 		ln = NULL;
88926deb882SAlexander V. Chernikov 		nd6_ns_output(ifp, psrc, pdst, dst, NULL);
89026deb882SAlexander V. Chernikov 	}
89126deb882SAlexander V. Chernikov 
8926e6b3f7cSQing Li 	if (ln != NULL)
893e6950476SBjoern A. Zeeb 		LLE_FREE_LOCKED(ln);
894f0c0b143SHajimu UMEMOTO 	CURVNET_RESTORE();
89582cd038dSYoshinobu Inoue }
89682cd038dSYoshinobu Inoue 
897743eee66SSUZUKI Shinsuke 
898743eee66SSUZUKI Shinsuke /*
899743eee66SSUZUKI Shinsuke  * ND6 timer routine to expire default route list and prefix list
900743eee66SSUZUKI Shinsuke  */
901743eee66SSUZUKI Shinsuke void
9028b615593SMarko Zec nd6_timer(void *arg)
903743eee66SSUZUKI Shinsuke {
90421ca7b57SMarko Zec 	CURVNET_SET((struct vnet *) arg);
9054de485feSMark Johnston 	struct nd_drhead drq;
9063b0b2840SJohn Baldwin 	struct nd_defrouter *dr, *ndr;
9073b0b2840SJohn Baldwin 	struct nd_prefix *pr, *npr;
908743eee66SSUZUKI Shinsuke 	struct in6_ifaddr *ia6, *nia6;
909743eee66SSUZUKI Shinsuke 
9104de485feSMark Johnston 	TAILQ_INIT(&drq);
9114de485feSMark Johnston 
91233841545SHajimu UMEMOTO 	/* expire default router list */
9134de485feSMark Johnston 	ND6_WLOCK();
9144de485feSMark Johnston 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr)
9157d26db17SHiroki Sato 		if (dr->expire && dr->expire < time_uptime)
9164de485feSMark Johnston 			defrouter_unlink(dr, &drq);
9174de485feSMark Johnston 	ND6_WUNLOCK();
9184de485feSMark Johnston 
9194de485feSMark Johnston 	while ((dr = TAILQ_FIRST(&drq)) != NULL) {
9204de485feSMark Johnston 		TAILQ_REMOVE(&drq, dr, dr_entry);
9214de485feSMark Johnston 		defrouter_del(dr);
922686cdd19SJun-ichiro itojun Hagino 	}
92382cd038dSYoshinobu Inoue 
92433841545SHajimu UMEMOTO 	/*
92533841545SHajimu UMEMOTO 	 * expire interface addresses.
92633841545SHajimu UMEMOTO 	 * in the past the loop was inside prefix expiry processing.
92733841545SHajimu UMEMOTO 	 * However, from a stricter speci-confrmance standpoint, we should
92833841545SHajimu UMEMOTO 	 * rather separate address lifetimes and prefix lifetimes.
929d1da0a06SRobert Watson 	 *
930d1da0a06SRobert Watson 	 * XXXRW: in6_ifaddrhead locking.
93133841545SHajimu UMEMOTO 	 */
93233841545SHajimu UMEMOTO   addrloop:
93380af0152SRobert Watson 	TAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) {
93482cd038dSYoshinobu Inoue 		/* check address lifetime */
93533841545SHajimu UMEMOTO 		if (IFA6_IS_INVALID(ia6)) {
93633841545SHajimu UMEMOTO 			int regen = 0;
93733841545SHajimu UMEMOTO 
93833841545SHajimu UMEMOTO 			/*
93933841545SHajimu UMEMOTO 			 * If the expiring address is temporary, try
94033841545SHajimu UMEMOTO 			 * regenerating a new one.  This would be useful when
94188ff5695SSUZUKI Shinsuke 			 * we suspended a laptop PC, then turned it on after a
94233841545SHajimu UMEMOTO 			 * period that could invalidate all temporary
94333841545SHajimu UMEMOTO 			 * addresses.  Although we may have to restart the
94433841545SHajimu UMEMOTO 			 * loop (see below), it must be after purging the
94533841545SHajimu UMEMOTO 			 * address.  Otherwise, we'd see an infinite loop of
94633841545SHajimu UMEMOTO 			 * regeneration.
94733841545SHajimu UMEMOTO 			 */
948603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
94933841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
95033841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0)
95133841545SHajimu UMEMOTO 					regen = 1;
95233841545SHajimu UMEMOTO 			}
95333841545SHajimu UMEMOTO 
95433841545SHajimu UMEMOTO 			in6_purgeaddr(&ia6->ia_ifa);
95533841545SHajimu UMEMOTO 
95633841545SHajimu UMEMOTO 			if (regen)
95733841545SHajimu UMEMOTO 				goto addrloop; /* XXX: see below */
95843068328SHajimu UMEMOTO 		} else if (IFA6_IS_DEPRECATED(ia6)) {
95933841545SHajimu UMEMOTO 			int oldflags = ia6->ia6_flags;
96033841545SHajimu UMEMOTO 
96182cd038dSYoshinobu Inoue 			ia6->ia6_flags |= IN6_IFF_DEPRECATED;
96233841545SHajimu UMEMOTO 
96333841545SHajimu UMEMOTO 			/*
96433841545SHajimu UMEMOTO 			 * If a temporary address has just become deprecated,
96533841545SHajimu UMEMOTO 			 * regenerate a new one if possible.
96633841545SHajimu UMEMOTO 			 */
967603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
96833841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
96933841545SHajimu UMEMOTO 			    (oldflags & IN6_IFF_DEPRECATED) == 0) {
97033841545SHajimu UMEMOTO 
97133841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0) {
97233841545SHajimu UMEMOTO 					/*
97333841545SHajimu UMEMOTO 					 * A new temporary address is
97433841545SHajimu UMEMOTO 					 * generated.
97533841545SHajimu UMEMOTO 					 * XXX: this means the address chain
97633841545SHajimu UMEMOTO 					 * has changed while we are still in
97733841545SHajimu UMEMOTO 					 * the loop.  Although the change
97833841545SHajimu UMEMOTO 					 * would not cause disaster (because
97988ff5695SSUZUKI Shinsuke 					 * it's not a deletion, but an
98088ff5695SSUZUKI Shinsuke 					 * addition,) we'd rather restart the
98133841545SHajimu UMEMOTO 					 * loop just for safety.  Or does this
98233841545SHajimu UMEMOTO 					 * significantly reduce performance??
98333841545SHajimu UMEMOTO 					 */
98433841545SHajimu UMEMOTO 					goto addrloop;
98533841545SHajimu UMEMOTO 				}
98633841545SHajimu UMEMOTO 			}
9876401c828SHiroki Sato 		} else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) {
9886401c828SHiroki Sato 			/*
9896401c828SHiroki Sato 			 * Schedule DAD for a tentative address.  This happens
9906401c828SHiroki Sato 			 * if the interface was down or not running
9916401c828SHiroki Sato 			 * when the address was configured.
9926401c828SHiroki Sato 			 */
9936401c828SHiroki Sato 			int delay;
9946401c828SHiroki Sato 
9956401c828SHiroki Sato 			delay = arc4random() %
9966401c828SHiroki Sato 			    (MAX_RTR_SOLICITATION_DELAY * hz);
9976401c828SHiroki Sato 			nd6_dad_start((struct ifaddr *)ia6, delay);
99883649f07SHajimu UMEMOTO 		} else {
99933841545SHajimu UMEMOTO 			/*
10006401c828SHiroki Sato 			 * Check status of the interface.  If it is down,
10016401c828SHiroki Sato 			 * mark the address as tentative for future DAD.
10026401c828SHiroki Sato 			 */
10036401c828SHiroki Sato 			if ((ia6->ia_ifp->if_flags & IFF_UP) == 0 ||
10046401c828SHiroki Sato 			    (ia6->ia_ifp->if_drv_flags & IFF_DRV_RUNNING)
10056401c828SHiroki Sato 				== 0 ||
10066401c828SHiroki Sato 			    (ND_IFINFO(ia6->ia_ifp)->flags &
10076401c828SHiroki Sato 				ND6_IFF_IFDISABLED) != 0) {
10086401c828SHiroki Sato 				ia6->ia6_flags &= ~IN6_IFF_DUPLICATED;
10096401c828SHiroki Sato 				ia6->ia6_flags |= IN6_IFF_TENTATIVE;
10106401c828SHiroki Sato 			}
10116401c828SHiroki Sato 			/*
101233841545SHajimu UMEMOTO 			 * A new RA might have made a deprecated address
101333841545SHajimu UMEMOTO 			 * preferred.
101433841545SHajimu UMEMOTO 			 */
101533841545SHajimu UMEMOTO 			ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
101682cd038dSYoshinobu Inoue 		}
101782cd038dSYoshinobu Inoue 	}
101882cd038dSYoshinobu Inoue 
101933841545SHajimu UMEMOTO 	/* expire prefix list */
10203b0b2840SJohn Baldwin 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
102182cd038dSYoshinobu Inoue 		/*
102282cd038dSYoshinobu Inoue 		 * check prefix lifetime.
102382cd038dSYoshinobu Inoue 		 * since pltime is just for autoconf, pltime processing for
102482cd038dSYoshinobu Inoue 		 * prefix is not necessary.
102582cd038dSYoshinobu Inoue 		 */
1026743eee66SSUZUKI Shinsuke 		if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME &&
10277d26db17SHiroki Sato 		    time_uptime - pr->ndpr_lastupdate > pr->ndpr_vltime) {
102882cd038dSYoshinobu Inoue 
102982cd038dSYoshinobu Inoue 			/*
103082cd038dSYoshinobu Inoue 			 * address expiration and prefix expiration are
103133841545SHajimu UMEMOTO 			 * separate.  NEVER perform in6_purgeaddr here.
103282cd038dSYoshinobu Inoue 			 */
103382cd038dSYoshinobu Inoue 			prelist_remove(pr);
10343b0b2840SJohn Baldwin 		}
103582cd038dSYoshinobu Inoue 	}
103699a0c406SBjoern A. Zeeb 
103799a0c406SBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz,
103899a0c406SBjoern A. Zeeb 	    nd6_timer, curvnet);
103999a0c406SBjoern A. Zeeb 
10408b615593SMarko Zec 	CURVNET_RESTORE();
104182cd038dSYoshinobu Inoue }
104282cd038dSYoshinobu Inoue 
10431272577eSXin LI /*
10441272577eSXin LI  * ia6 - deprecated/invalidated temporary address
10451272577eSXin LI  */
104633841545SHajimu UMEMOTO static int
10471272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6)
104833841545SHajimu UMEMOTO {
104933841545SHajimu UMEMOTO 	struct ifaddr *ifa;
105033841545SHajimu UMEMOTO 	struct ifnet *ifp;
105133841545SHajimu UMEMOTO 	struct in6_ifaddr *public_ifa6 = NULL;
105233841545SHajimu UMEMOTO 
105333841545SHajimu UMEMOTO 	ifp = ia6->ia_ifa.ifa_ifp;
1054137f91e8SJohn Baldwin 	IF_ADDR_RLOCK(ifp);
1055c4dd3fe1SRobert Watson 	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
105633841545SHajimu UMEMOTO 		struct in6_ifaddr *it6;
105733841545SHajimu UMEMOTO 
105833841545SHajimu UMEMOTO 		if (ifa->ifa_addr->sa_family != AF_INET6)
105933841545SHajimu UMEMOTO 			continue;
106033841545SHajimu UMEMOTO 
106133841545SHajimu UMEMOTO 		it6 = (struct in6_ifaddr *)ifa;
106233841545SHajimu UMEMOTO 
106333841545SHajimu UMEMOTO 		/* ignore no autoconf addresses. */
106433841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
106533841545SHajimu UMEMOTO 			continue;
106633841545SHajimu UMEMOTO 
106733841545SHajimu UMEMOTO 		/* ignore autoconf addresses with different prefixes. */
106833841545SHajimu UMEMOTO 		if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
106933841545SHajimu UMEMOTO 			continue;
107033841545SHajimu UMEMOTO 
107133841545SHajimu UMEMOTO 		/*
107233841545SHajimu UMEMOTO 		 * Now we are looking at an autoconf address with the same
107333841545SHajimu UMEMOTO 		 * prefix as ours.  If the address is temporary and is still
107433841545SHajimu UMEMOTO 		 * preferred, do not create another one.  It would be rare, but
107533841545SHajimu UMEMOTO 		 * could happen, for example, when we resume a laptop PC after
107633841545SHajimu UMEMOTO 		 * a long period.
107733841545SHajimu UMEMOTO 		 */
107833841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
107933841545SHajimu UMEMOTO 		    !IFA6_IS_DEPRECATED(it6)) {
108033841545SHajimu UMEMOTO 			public_ifa6 = NULL;
108133841545SHajimu UMEMOTO 			break;
108233841545SHajimu UMEMOTO 		}
108333841545SHajimu UMEMOTO 
108433841545SHajimu UMEMOTO 		/*
108533841545SHajimu UMEMOTO 		 * This is a public autoconf address that has the same prefix
108633841545SHajimu UMEMOTO 		 * as ours.  If it is preferred, keep it.  We can't break the
108733841545SHajimu UMEMOTO 		 * loop here, because there may be a still-preferred temporary
108833841545SHajimu UMEMOTO 		 * address with the prefix.
108933841545SHajimu UMEMOTO 		 */
109033841545SHajimu UMEMOTO 		if (!IFA6_IS_DEPRECATED(it6))
109133841545SHajimu UMEMOTO 			public_ifa6 = it6;
1092dff78447SMark Johnston 	}
1093c1752bcdSQing Li 	if (public_ifa6 != NULL)
1094c1752bcdSQing Li 		ifa_ref(&public_ifa6->ia_ifa);
1095137f91e8SJohn Baldwin 	IF_ADDR_RUNLOCK(ifp);
109633841545SHajimu UMEMOTO 
109733841545SHajimu UMEMOTO 	if (public_ifa6 != NULL) {
109833841545SHajimu UMEMOTO 		int e;
109933841545SHajimu UMEMOTO 
1100743eee66SSUZUKI Shinsuke 		if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
1101c1752bcdSQing Li 			ifa_free(&public_ifa6->ia_ifa);
110233841545SHajimu UMEMOTO 			log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
110333841545SHajimu UMEMOTO 			    " tmp addr,errno=%d\n", e);
110433841545SHajimu UMEMOTO 			return (-1);
110533841545SHajimu UMEMOTO 		}
1106c1752bcdSQing Li 		ifa_free(&public_ifa6->ia_ifa);
110733841545SHajimu UMEMOTO 		return (0);
110833841545SHajimu UMEMOTO 	}
110933841545SHajimu UMEMOTO 
111033841545SHajimu UMEMOTO 	return (-1);
111133841545SHajimu UMEMOTO }
111233841545SHajimu UMEMOTO 
1113686cdd19SJun-ichiro itojun Hagino /*
1114df890b8eSMark Johnston  * Remove prefix and default router list entries corresponding to ifp. Neighbor
1115df890b8eSMark Johnston  * cache entries are freed in in6_domifdetach().
1116686cdd19SJun-ichiro itojun Hagino  */
1117686cdd19SJun-ichiro itojun Hagino void
11181272577eSXin LI nd6_purge(struct ifnet *ifp)
1119686cdd19SJun-ichiro itojun Hagino {
11204de485feSMark Johnston 	struct nd_drhead drq;
1121743eee66SSUZUKI Shinsuke 	struct nd_defrouter *dr, *ndr;
1122686cdd19SJun-ichiro itojun Hagino 	struct nd_prefix *pr, *npr;
1123686cdd19SJun-ichiro itojun Hagino 
11244de485feSMark Johnston 	TAILQ_INIT(&drq);
11254de485feSMark Johnston 
1126686cdd19SJun-ichiro itojun Hagino 	/*
1127743eee66SSUZUKI Shinsuke 	 * Nuke default router list entries toward ifp.
1128743eee66SSUZUKI Shinsuke 	 * We defer removal of default router list entries that is installed
1129743eee66SSUZUKI Shinsuke 	 * in the routing table, in order to keep additional side effects as
1130743eee66SSUZUKI Shinsuke 	 * small as possible.
1131686cdd19SJun-ichiro itojun Hagino 	 */
11324de485feSMark Johnston 	ND6_WLOCK();
11333b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
1134743eee66SSUZUKI Shinsuke 		if (dr->installed)
1135743eee66SSUZUKI Shinsuke 			continue;
1136686cdd19SJun-ichiro itojun Hagino 		if (dr->ifp == ifp)
11374de485feSMark Johnston 			defrouter_unlink(dr, &drq);
1138686cdd19SJun-ichiro itojun Hagino 	}
1139743eee66SSUZUKI Shinsuke 
11403b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
1141743eee66SSUZUKI Shinsuke 		if (!dr->installed)
1142743eee66SSUZUKI Shinsuke 			continue;
1143686cdd19SJun-ichiro itojun Hagino 		if (dr->ifp == ifp)
11444de485feSMark Johnston 			defrouter_unlink(dr, &drq);
11454de485feSMark Johnston 	}
11464de485feSMark Johnston 	ND6_WUNLOCK();
11474de485feSMark Johnston 
11484de485feSMark Johnston 	while ((dr = TAILQ_FIRST(&drq)) != NULL) {
11494de485feSMark Johnston 		TAILQ_REMOVE(&drq, dr, dr_entry);
11504de485feSMark Johnston 		defrouter_del(dr);
1151686cdd19SJun-ichiro itojun Hagino 	}
1152686cdd19SJun-ichiro itojun Hagino 
1153686cdd19SJun-ichiro itojun Hagino 	/* Nuke prefix list entries toward ifp */
11543b0b2840SJohn Baldwin 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1155686cdd19SJun-ichiro itojun Hagino 		if (pr->ndpr_ifp == ifp) {
115633841545SHajimu UMEMOTO 			/*
1157743eee66SSUZUKI Shinsuke 			 * Because if_detach() does *not* release prefixes
1158743eee66SSUZUKI Shinsuke 			 * while purging addresses the reference count will
1159743eee66SSUZUKI Shinsuke 			 * still be above zero. We therefore reset it to
1160743eee66SSUZUKI Shinsuke 			 * make sure that the prefix really gets purged.
1161743eee66SSUZUKI Shinsuke 			 */
1162*0bbf244eSMark Johnston 			pr->ndpr_addrcnt = 0;
1163743eee66SSUZUKI Shinsuke 
1164686cdd19SJun-ichiro itojun Hagino 			prelist_remove(pr);
1165686cdd19SJun-ichiro itojun Hagino 		}
1166686cdd19SJun-ichiro itojun Hagino 	}
1167686cdd19SJun-ichiro itojun Hagino 
1168686cdd19SJun-ichiro itojun Hagino 	/* cancel default outgoing interface setting */
1169603724d3SBjoern A. Zeeb 	if (V_nd6_defifindex == ifp->if_index)
1170686cdd19SJun-ichiro itojun Hagino 		nd6_setdefaultiface(0);
1171686cdd19SJun-ichiro itojun Hagino 
1172e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1173a283298cSHiroki Sato 		/* Refresh default router list. */
1174686cdd19SJun-ichiro itojun Hagino 		defrouter_select();
11756e6b3f7cSQing Li 	}
11761026ccc4SHajimu UMEMOTO }
1177686cdd19SJun-ichiro itojun Hagino 
1178686cdd19SJun-ichiro itojun Hagino /*
11796e6b3f7cSQing Li  * the caller acquires and releases the lock on the lltbls
11806e6b3f7cSQing Li  * Returns the llentry locked
1181686cdd19SJun-ichiro itojun Hagino  */
11826e6b3f7cSQing Li struct llentry *
1183f0316e1aSAlexander V. Chernikov nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
118482cd038dSYoshinobu Inoue {
118582cd038dSYoshinobu Inoue 	struct sockaddr_in6 sin6;
11866e6b3f7cSQing Li 	struct llentry *ln;
118782cd038dSYoshinobu Inoue 
118882cd038dSYoshinobu Inoue 	bzero(&sin6, sizeof(sin6));
118982cd038dSYoshinobu Inoue 	sin6.sin6_len = sizeof(struct sockaddr_in6);
119082cd038dSYoshinobu Inoue 	sin6.sin6_family = AF_INET6;
119182cd038dSYoshinobu Inoue 	sin6.sin6_addr = *addr6;
1192686cdd19SJun-ichiro itojun Hagino 
11936e6b3f7cSQing Li 	IF_AFDATA_LOCK_ASSERT(ifp);
119482cd038dSYoshinobu Inoue 
1195f506d933SAlexander V. Chernikov 	ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6);
1196b4b1367aSAlexander V. Chernikov 
1197b4b1367aSAlexander V. Chernikov 	return (ln);
1198b4b1367aSAlexander V. Chernikov }
1199b4b1367aSAlexander V. Chernikov 
1200b4b1367aSAlexander V. Chernikov struct llentry *
1201f0316e1aSAlexander V. Chernikov nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1202b4b1367aSAlexander V. Chernikov {
1203b4b1367aSAlexander V. Chernikov 	struct sockaddr_in6 sin6;
1204b4b1367aSAlexander V. Chernikov 	struct llentry *ln;
1205b4b1367aSAlexander V. Chernikov 
1206b4b1367aSAlexander V. Chernikov 	bzero(&sin6, sizeof(sin6));
1207b4b1367aSAlexander V. Chernikov 	sin6.sin6_len = sizeof(struct sockaddr_in6);
1208b4b1367aSAlexander V. Chernikov 	sin6.sin6_family = AF_INET6;
1209b4b1367aSAlexander V. Chernikov 	sin6.sin6_addr = *addr6;
1210b4b1367aSAlexander V. Chernikov 
12115a255516SAlexander V. Chernikov 	ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6);
1212b4b1367aSAlexander V. Chernikov 	if (ln != NULL)
121382cd038dSYoshinobu Inoue 		ln->ln_state = ND6_LLINFO_NOSTATE;
12146e6b3f7cSQing Li 
12156e6b3f7cSQing Li 	return (ln);
121682cd038dSYoshinobu Inoue }
121782cd038dSYoshinobu Inoue 
121882cd038dSYoshinobu Inoue /*
121977b691e0SBrian Feldman  * Test whether a given IPv6 address is a neighbor or not, ignoring
122077b691e0SBrian Feldman  * the actual neighbor cache.  The neighbor cache is ignored in order
122177b691e0SBrian Feldman  * to not reenter the routing code from within itself.
122282cd038dSYoshinobu Inoue  */
122377b691e0SBrian Feldman static int
1224f0316e1aSAlexander V. Chernikov nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
122582cd038dSYoshinobu Inoue {
12264208ea14SHajimu UMEMOTO 	struct nd_prefix *pr;
1227743eee66SSUZUKI Shinsuke 	struct ifaddr *dstaddr;
12289a1b64d5SAlexander V. Chernikov 	struct rt_addrinfo info;
12299a1b64d5SAlexander V. Chernikov 	struct sockaddr_in6 rt_key;
12309a1b64d5SAlexander V. Chernikov 	struct sockaddr *dst6;
12319a1b64d5SAlexander V. Chernikov 	int fibnum;
123282cd038dSYoshinobu Inoue 
1233686cdd19SJun-ichiro itojun Hagino 	/*
1234686cdd19SJun-ichiro itojun Hagino 	 * A link-local address is always a neighbor.
12354208ea14SHajimu UMEMOTO 	 * XXX: a link does not necessarily specify a single interface.
1236686cdd19SJun-ichiro itojun Hagino 	 */
1237a1f7e5f8SHajimu UMEMOTO 	if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
1238a1f7e5f8SHajimu UMEMOTO 		struct sockaddr_in6 sin6_copy;
1239a1f7e5f8SHajimu UMEMOTO 		u_int32_t zone;
1240a1f7e5f8SHajimu UMEMOTO 
1241a1f7e5f8SHajimu UMEMOTO 		/*
1242a1f7e5f8SHajimu UMEMOTO 		 * We need sin6_copy since sa6_recoverscope() may modify the
1243a1f7e5f8SHajimu UMEMOTO 		 * content (XXX).
1244a1f7e5f8SHajimu UMEMOTO 		 */
1245a1f7e5f8SHajimu UMEMOTO 		sin6_copy = *addr;
1246a1f7e5f8SHajimu UMEMOTO 		if (sa6_recoverscope(&sin6_copy))
1247a1f7e5f8SHajimu UMEMOTO 			return (0); /* XXX: should be impossible */
1248a1f7e5f8SHajimu UMEMOTO 		if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
1249a1f7e5f8SHajimu UMEMOTO 			return (0);
1250a1f7e5f8SHajimu UMEMOTO 		if (sin6_copy.sin6_scope_id == zone)
125182cd038dSYoshinobu Inoue 			return (1);
1252a1f7e5f8SHajimu UMEMOTO 		else
1253a1f7e5f8SHajimu UMEMOTO 			return (0);
1254a1f7e5f8SHajimu UMEMOTO 	}
125582cd038dSYoshinobu Inoue 
12569a1b64d5SAlexander V. Chernikov 	bzero(&rt_key, sizeof(rt_key));
12579a1b64d5SAlexander V. Chernikov 	bzero(&info, sizeof(info));
12589a1b64d5SAlexander V. Chernikov 	info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key;
12599a1b64d5SAlexander V. Chernikov 
12609a1b64d5SAlexander V. Chernikov 	/* Always use the default FIB here. XXME - why? */
12619a1b64d5SAlexander V. Chernikov 	fibnum = RT_DEFAULT_FIB;
12629a1b64d5SAlexander V. Chernikov 
126382cd038dSYoshinobu Inoue 	/*
126482cd038dSYoshinobu Inoue 	 * If the address matches one of our addresses,
126582cd038dSYoshinobu Inoue 	 * it should be a neighbor.
12664208ea14SHajimu UMEMOTO 	 * If the address matches one of our on-link prefixes, it should be a
12674208ea14SHajimu UMEMOTO 	 * neighbor.
126882cd038dSYoshinobu Inoue 	 */
12693b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
12704208ea14SHajimu UMEMOTO 		if (pr->ndpr_ifp != ifp)
12714208ea14SHajimu UMEMOTO 			continue;
127282cd038dSYoshinobu Inoue 
1273baf7c373SQing Li 		if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) {
127481d5d46bSBjoern A. Zeeb 
127581d5d46bSBjoern A. Zeeb 			/* Always use the default FIB here. */
12769a1b64d5SAlexander V. Chernikov 			dst6 = (struct sockaddr *)&pr->ndpr_prefix;
12779a1b64d5SAlexander V. Chernikov 
12789a1b64d5SAlexander V. Chernikov 			/* Restore length field before retrying lookup */
12799a1b64d5SAlexander V. Chernikov 			rt_key.sin6_len = sizeof(rt_key);
12809a1b64d5SAlexander V. Chernikov 			if (rib_lookup_info(fibnum, dst6, 0, 0, &info) != 0)
12814208ea14SHajimu UMEMOTO 				continue;
1282baf7c373SQing Li 			/*
1283baf7c373SQing Li 			 * This is the case where multiple interfaces
1284baf7c373SQing Li 			 * have the same prefix, but only one is installed
1285baf7c373SQing Li 			 * into the routing table and that prefix entry
1286baf7c373SQing Li 			 * is not the one being examined here. In the case
1287baf7c373SQing Li 			 * where RADIX_MPATH is enabled, multiple route
1288baf7c373SQing Li 			 * entries (of the same rt_key value) will be
1289baf7c373SQing Li 			 * installed because the interface addresses all
1290baf7c373SQing Li 			 * differ.
1291baf7c373SQing Li 			 */
1292baf7c373SQing Li 			if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
12939a1b64d5SAlexander V. Chernikov 			       &rt_key.sin6_addr))
1294baf7c373SQing Li 				continue;
1295baf7c373SQing Li 		}
12964208ea14SHajimu UMEMOTO 
12974208ea14SHajimu UMEMOTO 		if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
12984208ea14SHajimu UMEMOTO 		    &addr->sin6_addr, &pr->ndpr_mask))
12994208ea14SHajimu UMEMOTO 			return (1);
130082cd038dSYoshinobu Inoue 	}
13014208ea14SHajimu UMEMOTO 
13024208ea14SHajimu UMEMOTO 	/*
1303743eee66SSUZUKI Shinsuke 	 * If the address is assigned on the node of the other side of
1304743eee66SSUZUKI Shinsuke 	 * a p2p interface, the address should be a neighbor.
1305743eee66SSUZUKI Shinsuke 	 */
1306f0316e1aSAlexander V. Chernikov 	dstaddr = ifa_ifwithdstaddr((const struct sockaddr *)addr, RT_ALL_FIBS);
13078c0fec80SRobert Watson 	if (dstaddr != NULL) {
13088c0fec80SRobert Watson 		if (dstaddr->ifa_ifp == ifp) {
13098c0fec80SRobert Watson 			ifa_free(dstaddr);
1310743eee66SSUZUKI Shinsuke 			return (1);
13118c0fec80SRobert Watson 		}
13128c0fec80SRobert Watson 		ifa_free(dstaddr);
13138c0fec80SRobert Watson 	}
1314743eee66SSUZUKI Shinsuke 
1315743eee66SSUZUKI Shinsuke 	/*
13164208ea14SHajimu UMEMOTO 	 * If the default router list is empty, all addresses are regarded
13174208ea14SHajimu UMEMOTO 	 * as on-link, and thus, as a neighbor.
13184208ea14SHajimu UMEMOTO 	 */
1319e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV &&
13203b0b2840SJohn Baldwin 	    TAILQ_EMPTY(&V_nd_defrouter) &&
1321603724d3SBjoern A. Zeeb 	    V_nd6_defifindex == ifp->if_index) {
132282cd038dSYoshinobu Inoue 		return (1);
132382cd038dSYoshinobu Inoue 	}
132482cd038dSYoshinobu Inoue 
132577b691e0SBrian Feldman 	return (0);
132677b691e0SBrian Feldman }
132777b691e0SBrian Feldman 
132877b691e0SBrian Feldman 
132977b691e0SBrian Feldman /*
133077b691e0SBrian Feldman  * Detect if a given IPv6 address identifies a neighbor on a given link.
133177b691e0SBrian Feldman  * XXX: should take care of the destination of a p2p link?
133277b691e0SBrian Feldman  */
133377b691e0SBrian Feldman int
1334f0316e1aSAlexander V. Chernikov nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
133577b691e0SBrian Feldman {
13366e6b3f7cSQing Li 	struct llentry *lle;
13376e6b3f7cSQing Li 	int rc = 0;
133877b691e0SBrian Feldman 
13396e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
134077b691e0SBrian Feldman 	if (nd6_is_new_addr_neighbor(addr, ifp))
134177b691e0SBrian Feldman 		return (1);
134277b691e0SBrian Feldman 
134382cd038dSYoshinobu Inoue 	/*
134482cd038dSYoshinobu Inoue 	 * Even if the address matches none of our addresses, it might be
134582cd038dSYoshinobu Inoue 	 * in the neighbor cache.
134682cd038dSYoshinobu Inoue 	 */
134773cb2f38SAndrey V. Elsukov 	IF_AFDATA_RLOCK(ifp);
13486e6b3f7cSQing Li 	if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) {
13496e6b3f7cSQing Li 		LLE_RUNLOCK(lle);
13506e6b3f7cSQing Li 		rc = 1;
13516e6b3f7cSQing Li 	}
135273cb2f38SAndrey V. Elsukov 	IF_AFDATA_RUNLOCK(ifp);
13536e6b3f7cSQing Li 	return (rc);
135482cd038dSYoshinobu Inoue }
135582cd038dSYoshinobu Inoue 
135682cd038dSYoshinobu Inoue /*
135782cd038dSYoshinobu Inoue  * Free an nd6 llinfo entry.
1358743eee66SSUZUKI Shinsuke  * Since the function would cause significant changes in the kernel, DO NOT
1359743eee66SSUZUKI Shinsuke  * make it global, unless you have a strong reason for the change, and are sure
1360743eee66SSUZUKI Shinsuke  * that the change is safe.
1361c0b8aeaeSAlexander V. Chernikov  *
1362c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
136382cd038dSYoshinobu Inoue  */
1364c0b8aeaeSAlexander V. Chernikov static __noinline void
1365435bece4SMark Johnston nd6_free(struct llentry **lnp, int gc)
136682cd038dSYoshinobu Inoue {
1367e6950476SBjoern A. Zeeb 	struct ifnet *ifp;
1368435bece4SMark Johnston 	struct llentry *ln;
1369435bece4SMark Johnston 	struct nd_defrouter *dr;
1370435bece4SMark Johnston 
1371435bece4SMark Johnston 	ln = *lnp;
1372435bece4SMark Johnston 	*lnp = NULL;
1373e6950476SBjoern A. Zeeb 
1374e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
1375435bece4SMark Johnston 	ND6_RLOCK_ASSERT();
1376435bece4SMark Johnston 
1377435bece4SMark Johnston 	ifp = lltable_get_ifp(ln->lle_tbl);
1378435bece4SMark Johnston 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0)
1379435bece4SMark Johnston 		dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp);
1380435bece4SMark Johnston 	else
1381435bece4SMark Johnston 		dr = NULL;
1382435bece4SMark Johnston 	ND6_RUNLOCK();
1383435bece4SMark Johnston 
1384435bece4SMark Johnston 	if ((ln->la_flags & LLE_DELETED) == 0)
1385435bece4SMark Johnston 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
138682cd038dSYoshinobu Inoue 
138782cd038dSYoshinobu Inoue 	/*
138833841545SHajimu UMEMOTO 	 * we used to have pfctlinput(PRC_HOSTDEAD) here.
138933841545SHajimu UMEMOTO 	 * even though it is not harmful, it was not really necessary.
139082cd038dSYoshinobu Inoue 	 */
1391686cdd19SJun-ichiro itojun Hagino 
1392743eee66SSUZUKI Shinsuke 	/* cancel timer */
1393e6950476SBjoern A. Zeeb 	nd6_llinfo_settimer_locked(ln, -1);
1394e6950476SBjoern A. Zeeb 
1395e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1396743eee66SSUZUKI Shinsuke 		if (dr != NULL && dr->expire &&
1397743eee66SSUZUKI Shinsuke 		    ln->ln_state == ND6_LLINFO_STALE && gc) {
1398743eee66SSUZUKI Shinsuke 			/*
1399743eee66SSUZUKI Shinsuke 			 * If the reason for the deletion is just garbage
1400743eee66SSUZUKI Shinsuke 			 * collection, and the neighbor is an active default
1401743eee66SSUZUKI Shinsuke 			 * router, do not delete it.  Instead, reset the GC
1402743eee66SSUZUKI Shinsuke 			 * timer using the router's lifetime.
1403743eee66SSUZUKI Shinsuke 			 * Simply deleting the entry would affect default
1404743eee66SSUZUKI Shinsuke 			 * router selection, which is not necessarily a good
1405743eee66SSUZUKI Shinsuke 			 * thing, especially when we're using router preference
1406743eee66SSUZUKI Shinsuke 			 * values.
1407743eee66SSUZUKI Shinsuke 			 * XXX: the check for ln_state would be redundant,
1408743eee66SSUZUKI Shinsuke 			 *      but we intentionally keep it just in case.
1409743eee66SSUZUKI Shinsuke 			 */
14107d26db17SHiroki Sato 			if (dr->expire > time_uptime)
1411e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
14127d26db17SHiroki Sato 				    (dr->expire - time_uptime) * hz);
1413743eee66SSUZUKI Shinsuke 			else
1414e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
1415e6950476SBjoern A. Zeeb 				    (long)V_nd6_gctimer * hz);
1416e6950476SBjoern A. Zeeb 
1417ef8d671cSHajimu UMEMOTO 			LLE_REMREF(ln);
1418ef8d671cSHajimu UMEMOTO 			LLE_WUNLOCK(ln);
14194de485feSMark Johnston 			defrouter_rele(dr);
1420d3cdb716SAlexander V. Chernikov 			return;
1421743eee66SSUZUKI Shinsuke 		}
1422743eee66SSUZUKI Shinsuke 
1423686cdd19SJun-ichiro itojun Hagino 		if (dr) {
1424686cdd19SJun-ichiro itojun Hagino 			/*
1425686cdd19SJun-ichiro itojun Hagino 			 * Unreachablity of a router might affect the default
1426686cdd19SJun-ichiro itojun Hagino 			 * router selection and on-link detection of advertised
1427686cdd19SJun-ichiro itojun Hagino 			 * prefixes.
1428686cdd19SJun-ichiro itojun Hagino 			 */
1429686cdd19SJun-ichiro itojun Hagino 
1430686cdd19SJun-ichiro itojun Hagino 			/*
1431686cdd19SJun-ichiro itojun Hagino 			 * Temporarily fake the state to choose a new default
1432686cdd19SJun-ichiro itojun Hagino 			 * router and to perform on-link determination of
143388ff5695SSUZUKI Shinsuke 			 * prefixes correctly.
1434686cdd19SJun-ichiro itojun Hagino 			 * Below the state will be set correctly,
1435686cdd19SJun-ichiro itojun Hagino 			 * or the entry itself will be deleted.
1436686cdd19SJun-ichiro itojun Hagino 			 */
1437686cdd19SJun-ichiro itojun Hagino 			ln->ln_state = ND6_LLINFO_INCOMPLETE;
14381d5089c2SBjoern A. Zeeb 		}
1439686cdd19SJun-ichiro itojun Hagino 
14401d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr) {
14411d5089c2SBjoern A. Zeeb 
14421d5089c2SBjoern A. Zeeb 			/*
14431d5089c2SBjoern A. Zeeb 			 * We need to unlock to avoid a LOR with rt6_flush() with the
14441d5089c2SBjoern A. Zeeb 			 * rnh and for the calls to pfxlist_onlink_check() and
14451d5089c2SBjoern A. Zeeb 			 * defrouter_select() in the block further down for calls
14461d5089c2SBjoern A. Zeeb 			 * into nd6_lookup().  We still hold a ref.
14471d5089c2SBjoern A. Zeeb 			 */
14481d5089c2SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
14491d5089c2SBjoern A. Zeeb 
14501d5089c2SBjoern A. Zeeb 			/*
14511d5089c2SBjoern A. Zeeb 			 * rt6_flush must be called whether or not the neighbor
14521d5089c2SBjoern A. Zeeb 			 * is in the Default Router List.
14531d5089c2SBjoern A. Zeeb 			 * See a corresponding comment in nd6_na_input().
14541d5089c2SBjoern A. Zeeb 			 */
1455314294deSAlexander V. Chernikov 			rt6_flush(&ln->r_l3addr.addr6, ifp);
14561d5089c2SBjoern A. Zeeb 		}
14571d5089c2SBjoern A. Zeeb 
14581d5089c2SBjoern A. Zeeb 		if (dr) {
145933841545SHajimu UMEMOTO 			/*
146033841545SHajimu UMEMOTO 			 * Since defrouter_select() does not affect the
146133841545SHajimu UMEMOTO 			 * on-link determination and MIP6 needs the check
146233841545SHajimu UMEMOTO 			 * before the default router selection, we perform
146333841545SHajimu UMEMOTO 			 * the check now.
146433841545SHajimu UMEMOTO 			 */
146533841545SHajimu UMEMOTO 			pfxlist_onlink_check();
146633841545SHajimu UMEMOTO 
1467686cdd19SJun-ichiro itojun Hagino 			/*
14681d5089c2SBjoern A. Zeeb 			 * Refresh default router list.
1469686cdd19SJun-ichiro itojun Hagino 			 */
1470686cdd19SJun-ichiro itojun Hagino 			defrouter_select();
1471686cdd19SJun-ichiro itojun Hagino 		}
14721d5089c2SBjoern A. Zeeb 
147317a03656SEric van Gyzen 		/*
147417a03656SEric van Gyzen 		 * If this entry was added by an on-link redirect, remove the
147517a03656SEric van Gyzen 		 * corresponding host route.
147617a03656SEric van Gyzen 		 */
147717a03656SEric van Gyzen 		if (ln->la_flags & LLE_REDIRECT)
147817a03656SEric van Gyzen 			nd6_free_redirect(ln);
147917a03656SEric van Gyzen 
14801d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr)
14811d5089c2SBjoern A. Zeeb 			LLE_WLOCK(ln);
148282cd038dSYoshinobu Inoue 	}
148382cd038dSYoshinobu Inoue 
148433841545SHajimu UMEMOTO 	/*
1485e6950476SBjoern A. Zeeb 	 * Save to unlock. We still hold an extra reference and will not
1486e6950476SBjoern A. Zeeb 	 * free(9) in llentry_free() if someone else holds one as well.
1487e6950476SBjoern A. Zeeb 	 */
1488e6950476SBjoern A. Zeeb 	LLE_WUNLOCK(ln);
14896e6b3f7cSQing Li 	IF_AFDATA_LOCK(ifp);
14906e6b3f7cSQing Li 	LLE_WLOCK(ln);
1491b1ec2940SGleb Smirnoff 	/* Guard against race with other llentry_free(). */
1492b1ec2940SGleb Smirnoff 	if (ln->la_flags & LLE_LINKED) {
1493d3cdb716SAlexander V. Chernikov 		/* Remove callout reference */
1494becba438SBjoern A. Zeeb 		LLE_REMREF(ln);
1495d3cdb716SAlexander V. Chernikov 		lltable_unlink_entry(ln->lle_tbl, ln);
1496d3cdb716SAlexander V. Chernikov 	}
14976e6b3f7cSQing Li 	IF_AFDATA_UNLOCK(ifp);
149833841545SHajimu UMEMOTO 
1499d3cdb716SAlexander V. Chernikov 	llentry_free(ln);
15004de485feSMark Johnston 	if (dr != NULL)
15014de485feSMark Johnston 		defrouter_rele(dr);
150282cd038dSYoshinobu Inoue }
150382cd038dSYoshinobu Inoue 
1504e8b0643eSAlexander V. Chernikov static int
1505e8b0643eSAlexander V. Chernikov nd6_isdynrte(const struct rtentry *rt, void *xap)
1506e8b0643eSAlexander V. Chernikov {
1507e8b0643eSAlexander V. Chernikov 
1508e8b0643eSAlexander V. Chernikov 	if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC))
1509e8b0643eSAlexander V. Chernikov 		return (1);
1510e8b0643eSAlexander V. Chernikov 
1511e8b0643eSAlexander V. Chernikov 	return (0);
1512e8b0643eSAlexander V. Chernikov }
151382cd038dSYoshinobu Inoue /*
151417a03656SEric van Gyzen  * Remove the rtentry for the given llentry,
151517a03656SEric van Gyzen  * both of which were installed by a redirect.
151617a03656SEric van Gyzen  */
151717a03656SEric van Gyzen static void
151817a03656SEric van Gyzen nd6_free_redirect(const struct llentry *ln)
151917a03656SEric van Gyzen {
152017a03656SEric van Gyzen 	int fibnum;
152117a03656SEric van Gyzen 	struct sockaddr_in6 sin6;
1522e8b0643eSAlexander V. Chernikov 	struct rt_addrinfo info;
152317a03656SEric van Gyzen 
152417a03656SEric van Gyzen 	lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6);
1525e8b0643eSAlexander V. Chernikov 	memset(&info, 0, sizeof(info));
1526e8b0643eSAlexander V. Chernikov 	info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6;
1527e8b0643eSAlexander V. Chernikov 	info.rti_filter = nd6_isdynrte;
152817a03656SEric van Gyzen 
1529e8b0643eSAlexander V. Chernikov 	for (fibnum = 0; fibnum < rt_numfibs; fibnum++)
1530e8b0643eSAlexander V. Chernikov 		rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum);
153117a03656SEric van Gyzen }
153217a03656SEric van Gyzen 
153317a03656SEric van Gyzen /*
15340f1aca65SQing Li  * Rejuvenate this function for routing operations related
15350f1aca65SQing Li  * processing.
15360f1aca65SQing Li  */
15370f1aca65SQing Li void
15380f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
15390f1aca65SQing Li {
154039e19560SBjoern A. Zeeb 	struct sockaddr_in6 *gateway;
15410f1aca65SQing Li 	struct nd_defrouter *dr;
154239e19560SBjoern A. Zeeb 	struct ifnet *ifp;
15430f1aca65SQing Li 
154439e19560SBjoern A. Zeeb 	gateway = (struct sockaddr_in6 *)rt->rt_gateway;
154539e19560SBjoern A. Zeeb 	ifp = rt->rt_ifp;
15460f1aca65SQing Li 
15470f1aca65SQing Li 	switch (req) {
15480f1aca65SQing Li 	case RTM_ADD:
15490f1aca65SQing Li 		break;
15500f1aca65SQing Li 
15510f1aca65SQing Li 	case RTM_DELETE:
15520f1aca65SQing Li 		if (!ifp)
15530f1aca65SQing Li 			return;
15540f1aca65SQing Li 		/*
15550f1aca65SQing Li 		 * Only indirect routes are interesting.
15560f1aca65SQing Li 		 */
15570f1aca65SQing Li 		if ((rt->rt_flags & RTF_GATEWAY) == 0)
15580f1aca65SQing Li 			return;
15590f1aca65SQing Li 		/*
15600f1aca65SQing Li 		 * check for default route
15610f1aca65SQing Li 		 */
15620f1aca65SQing Li 		if (IN6_ARE_ADDR_EQUAL(&in6addr_any,
15630f1aca65SQing Li 		    &SIN6(rt_key(rt))->sin6_addr)) {
15640f1aca65SQing Li 			dr = defrouter_lookup(&gateway->sin6_addr, ifp);
15654de485feSMark Johnston 			if (dr != NULL) {
15660f1aca65SQing Li 				dr->installed = 0;
15674de485feSMark Johnston 				defrouter_rele(dr);
15684de485feSMark Johnston 			}
15690f1aca65SQing Li 		}
15700f1aca65SQing Li 		break;
15710f1aca65SQing Li 	}
15720f1aca65SQing Li }
15730f1aca65SQing Li 
15740f1aca65SQing Li 
157582cd038dSYoshinobu Inoue int
15761272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
157782cd038dSYoshinobu Inoue {
157882cd038dSYoshinobu Inoue 	struct in6_ndireq *ndi = (struct in6_ndireq *)data;
157982cd038dSYoshinobu Inoue 	struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data;
1580686cdd19SJun-ichiro itojun Hagino 	struct in6_ndifreq *ndif = (struct in6_ndifreq *)data;
1581d0bec2c5SHiroki Sato 	int error = 0;
158282cd038dSYoshinobu Inoue 
15830de0dd9bSHiroki Sato 	if (ifp->if_afdata[AF_INET6] == NULL)
15840de0dd9bSHiroki Sato 		return (EPFNOSUPPORT);
158582cd038dSYoshinobu Inoue 	switch (cmd) {
158633841545SHajimu UMEMOTO 	case OSIOCGIFINFO_IN6:
15872ce62dceSSUZUKI Shinsuke #define ND	ndi->ndi
158831b1bfe1SHajimu UMEMOTO 		/* XXX: old ndp(8) assumes a positive value for linkmtu. */
15892ce62dceSSUZUKI Shinsuke 		bzero(&ND, sizeof(ND));
15902ce62dceSSUZUKI Shinsuke 		ND.linkmtu = IN6_LINKMTU(ifp);
15912ce62dceSSUZUKI Shinsuke 		ND.maxmtu = ND_IFINFO(ifp)->maxmtu;
15922ce62dceSSUZUKI Shinsuke 		ND.basereachable = ND_IFINFO(ifp)->basereachable;
15932ce62dceSSUZUKI Shinsuke 		ND.reachable = ND_IFINFO(ifp)->reachable;
15942ce62dceSSUZUKI Shinsuke 		ND.retrans = ND_IFINFO(ifp)->retrans;
15952ce62dceSSUZUKI Shinsuke 		ND.flags = ND_IFINFO(ifp)->flags;
15962ce62dceSSUZUKI Shinsuke 		ND.recalctm = ND_IFINFO(ifp)->recalctm;
15972ce62dceSSUZUKI Shinsuke 		ND.chlim = ND_IFINFO(ifp)->chlim;
159833841545SHajimu UMEMOTO 		break;
159982cd038dSYoshinobu Inoue 	case SIOCGIFINFO_IN6:
16002ce62dceSSUZUKI Shinsuke 		ND = *ND_IFINFO(ifp);
160182cd038dSYoshinobu Inoue 		break;
1602b9204379SSUZUKI Shinsuke 	case SIOCSIFINFO_IN6:
1603b9204379SSUZUKI Shinsuke 		/*
1604b9204379SSUZUKI Shinsuke 		 * used to change host variables from userland.
1605a4641f4eSPedro F. Giffuni 		 * intended for a use on router to reflect RA configurations.
1606b9204379SSUZUKI Shinsuke 		 */
1607b9204379SSUZUKI Shinsuke 		/* 0 means 'unspecified' */
1608b9204379SSUZUKI Shinsuke 		if (ND.linkmtu != 0) {
1609b9204379SSUZUKI Shinsuke 			if (ND.linkmtu < IPV6_MMTU ||
1610b9204379SSUZUKI Shinsuke 			    ND.linkmtu > IN6_LINKMTU(ifp)) {
1611b9204379SSUZUKI Shinsuke 				error = EINVAL;
1612b9204379SSUZUKI Shinsuke 				break;
1613b9204379SSUZUKI Shinsuke 			}
1614b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->linkmtu = ND.linkmtu;
1615b9204379SSUZUKI Shinsuke 		}
1616b9204379SSUZUKI Shinsuke 
1617b9204379SSUZUKI Shinsuke 		if (ND.basereachable != 0) {
1618b9204379SSUZUKI Shinsuke 			int obasereachable = ND_IFINFO(ifp)->basereachable;
1619b9204379SSUZUKI Shinsuke 
1620b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->basereachable = ND.basereachable;
1621b9204379SSUZUKI Shinsuke 			if (ND.basereachable != obasereachable)
1622b9204379SSUZUKI Shinsuke 				ND_IFINFO(ifp)->reachable =
1623b9204379SSUZUKI Shinsuke 				    ND_COMPUTE_RTIME(ND.basereachable);
1624b9204379SSUZUKI Shinsuke 		}
1625b9204379SSUZUKI Shinsuke 		if (ND.retrans != 0)
1626b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->retrans = ND.retrans;
1627b9204379SSUZUKI Shinsuke 		if (ND.chlim != 0)
1628b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->chlim = ND.chlim;
1629b9204379SSUZUKI Shinsuke 		/* FALLTHROUGH */
1630686cdd19SJun-ichiro itojun Hagino 	case SIOCSIFINFO_FLAGS:
1631a283298cSHiroki Sato 	{
1632a283298cSHiroki Sato 		struct ifaddr *ifa;
1633a283298cSHiroki Sato 		struct in6_ifaddr *ia;
1634a283298cSHiroki Sato 
1635a283298cSHiroki Sato 		if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1636a283298cSHiroki Sato 		    !(ND.flags & ND6_IFF_IFDISABLED)) {
1637a283298cSHiroki Sato 			/* ifdisabled 1->0 transision */
1638a283298cSHiroki Sato 
1639a283298cSHiroki Sato 			/*
1640a283298cSHiroki Sato 			 * If the interface is marked as ND6_IFF_IFDISABLED and
1641a283298cSHiroki Sato 			 * has an link-local address with IN6_IFF_DUPLICATED,
1642a283298cSHiroki Sato 			 * do not clear ND6_IFF_IFDISABLED.
1643a283298cSHiroki Sato 			 * See RFC 4862, Section 5.4.5.
1644a283298cSHiroki Sato 			 */
1645137f91e8SJohn Baldwin 			IF_ADDR_RLOCK(ifp);
1646a283298cSHiroki Sato 			TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1647a283298cSHiroki Sato 				if (ifa->ifa_addr->sa_family != AF_INET6)
1648a283298cSHiroki Sato 					continue;
1649a283298cSHiroki Sato 				ia = (struct in6_ifaddr *)ifa;
1650a283298cSHiroki Sato 				if ((ia->ia6_flags & IN6_IFF_DUPLICATED) &&
1651d0bec2c5SHiroki Sato 				    IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1652a283298cSHiroki Sato 					break;
1653a283298cSHiroki Sato 			}
1654137f91e8SJohn Baldwin 			IF_ADDR_RUNLOCK(ifp);
1655a283298cSHiroki Sato 
1656d0bec2c5SHiroki Sato 			if (ifa != NULL) {
1657d0bec2c5SHiroki Sato 				/* LLA is duplicated. */
1658a283298cSHiroki Sato 				ND.flags |= ND6_IFF_IFDISABLED;
1659a283298cSHiroki Sato 				log(LOG_ERR, "Cannot enable an interface"
1660a283298cSHiroki Sato 				    " with a link-local address marked"
1661a283298cSHiroki Sato 				    " duplicate.\n");
1662a283298cSHiroki Sato 			} else {
1663a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED;
1664154d5f73SHiroki Sato 				if (ifp->if_flags & IFF_UP)
1665a283298cSHiroki Sato 					in6_if_up(ifp);
1666a283298cSHiroki Sato 			}
1667a283298cSHiroki Sato 		} else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1668a283298cSHiroki Sato 			    (ND.flags & ND6_IFF_IFDISABLED)) {
1669a283298cSHiroki Sato 			/* ifdisabled 0->1 transision */
1670a283298cSHiroki Sato 			/* Mark all IPv6 address as tentative. */
1671a283298cSHiroki Sato 
1672a283298cSHiroki Sato 			ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
16736401c828SHiroki Sato 			if (V_ip6_dad_count > 0 &&
16746401c828SHiroki Sato 			    (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) {
1675137f91e8SJohn Baldwin 				IF_ADDR_RLOCK(ifp);
1676d0bec2c5SHiroki Sato 				TAILQ_FOREACH(ifa, &ifp->if_addrhead,
1677d0bec2c5SHiroki Sato 				    ifa_link) {
1678d0bec2c5SHiroki Sato 					if (ifa->ifa_addr->sa_family !=
1679d0bec2c5SHiroki Sato 					    AF_INET6)
1680a283298cSHiroki Sato 						continue;
1681a283298cSHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
1682a283298cSHiroki Sato 					ia->ia6_flags |= IN6_IFF_TENTATIVE;
1683a283298cSHiroki Sato 				}
1684137f91e8SJohn Baldwin 				IF_ADDR_RUNLOCK(ifp);
1685a283298cSHiroki Sato 			}
1686d0bec2c5SHiroki Sato 		}
1687a283298cSHiroki Sato 
1688154d5f73SHiroki Sato 		if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) {
1689154d5f73SHiroki Sato 			if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) {
1690a283298cSHiroki Sato 				/* auto_linklocal 0->1 transision */
1691a283298cSHiroki Sato 
1692a283298cSHiroki Sato 				/* If no link-local address on ifp, configure */
1693a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL;
1694a283298cSHiroki Sato 				in6_ifattach(ifp, NULL);
1695154d5f73SHiroki Sato 			} else if (!(ND.flags & ND6_IFF_IFDISABLED) &&
1696154d5f73SHiroki Sato 			    ifp->if_flags & IFF_UP) {
169777bc4985SHiroki Sato 				/*
169877bc4985SHiroki Sato 				 * When the IF already has
1699154d5f73SHiroki Sato 				 * ND6_IFF_AUTO_LINKLOCAL, no link-local
1700154d5f73SHiroki Sato 				 * address is assigned, and IFF_UP, try to
1701154d5f73SHiroki Sato 				 * assign one.
170277bc4985SHiroki Sato 				 */
1703137f91e8SJohn Baldwin 				IF_ADDR_RLOCK(ifp);
1704d0bec2c5SHiroki Sato 				TAILQ_FOREACH(ifa, &ifp->if_addrhead,
1705d0bec2c5SHiroki Sato 				    ifa_link) {
1706d0bec2c5SHiroki Sato 					if (ifa->ifa_addr->sa_family !=
1707d0bec2c5SHiroki Sato 					    AF_INET6)
170877bc4985SHiroki Sato 						continue;
170977bc4985SHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
1710d0bec2c5SHiroki Sato 					if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
171177bc4985SHiroki Sato 						break;
171277bc4985SHiroki Sato 				}
1713137f91e8SJohn Baldwin 				IF_ADDR_RUNLOCK(ifp);
1714d0bec2c5SHiroki Sato 				if (ifa != NULL)
1715d0bec2c5SHiroki Sato 					/* No LLA is configured. */
171677bc4985SHiroki Sato 					in6_ifattach(ifp, NULL);
1717a283298cSHiroki Sato 			}
1718a283298cSHiroki Sato 		}
1719154d5f73SHiroki Sato 	}
17202ce62dceSSUZUKI Shinsuke 		ND_IFINFO(ifp)->flags = ND.flags;
1721686cdd19SJun-ichiro itojun Hagino 		break;
17222ce62dceSSUZUKI Shinsuke #undef ND
1723686cdd19SJun-ichiro itojun Hagino 	case SIOCSNDFLUSH_IN6:	/* XXX: the ioctl name is confusing... */
1724743eee66SSUZUKI Shinsuke 		/* sync kernel routing table with the default router list */
1725743eee66SSUZUKI Shinsuke 		defrouter_reset();
1726686cdd19SJun-ichiro itojun Hagino 		defrouter_select();
172782cd038dSYoshinobu Inoue 		break;
172882cd038dSYoshinobu Inoue 	case SIOCSPFXFLUSH_IN6:
172982cd038dSYoshinobu Inoue 	{
173082cd038dSYoshinobu Inoue 		/* flush all the prefix advertised by routers */
173182cd038dSYoshinobu Inoue 		struct nd_prefix *pr, *next;
173282cd038dSYoshinobu Inoue 
17333b0b2840SJohn Baldwin 		LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) {
173433841545SHajimu UMEMOTO 			struct in6_ifaddr *ia, *ia_next;
173533841545SHajimu UMEMOTO 
173633841545SHajimu UMEMOTO 			if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
173733841545SHajimu UMEMOTO 				continue; /* XXX */
173833841545SHajimu UMEMOTO 
173933841545SHajimu UMEMOTO 			/* do we really have to remove addresses as well? */
1740d1da0a06SRobert Watson 			/* XXXRW: in6_ifaddrhead locking. */
174180af0152SRobert Watson 			TAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link,
174280af0152SRobert Watson 			    ia_next) {
174333841545SHajimu UMEMOTO 				if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
174433841545SHajimu UMEMOTO 					continue;
174533841545SHajimu UMEMOTO 
174633841545SHajimu UMEMOTO 				if (ia->ia6_ndpr == pr)
174733841545SHajimu UMEMOTO 					in6_purgeaddr(&ia->ia_ifa);
174833841545SHajimu UMEMOTO 			}
174982cd038dSYoshinobu Inoue 			prelist_remove(pr);
175082cd038dSYoshinobu Inoue 		}
175182cd038dSYoshinobu Inoue 		break;
175282cd038dSYoshinobu Inoue 	}
175382cd038dSYoshinobu Inoue 	case SIOCSRTRFLUSH_IN6:
175482cd038dSYoshinobu Inoue 	{
175582cd038dSYoshinobu Inoue 		/* flush all the default routers */
17564de485feSMark Johnston 		struct nd_drhead drq;
17574de485feSMark Johnston 		struct nd_defrouter *dr;
17584de485feSMark Johnston 
17594de485feSMark Johnston 		TAILQ_INIT(&drq);
176082cd038dSYoshinobu Inoue 
1761743eee66SSUZUKI Shinsuke 		defrouter_reset();
17624de485feSMark Johnston 
17634de485feSMark Johnston 		ND6_WLOCK();
17644de485feSMark Johnston 		while ((dr = TAILQ_FIRST(&V_nd_defrouter)) != NULL)
17654de485feSMark Johnston 			defrouter_unlink(dr, &drq);
17664de485feSMark Johnston 		ND6_WUNLOCK();
17674de485feSMark Johnston 		while ((dr = TAILQ_FIRST(&drq)) != NULL) {
17684de485feSMark Johnston 			TAILQ_REMOVE(&drq, dr, dr_entry);
17694de485feSMark Johnston 			defrouter_del(dr);
177082cd038dSYoshinobu Inoue 		}
17714de485feSMark Johnston 
1772743eee66SSUZUKI Shinsuke 		defrouter_select();
177382cd038dSYoshinobu Inoue 		break;
177482cd038dSYoshinobu Inoue 	}
177582cd038dSYoshinobu Inoue 	case SIOCGNBRINFO_IN6:
177682cd038dSYoshinobu Inoue 	{
17776e6b3f7cSQing Li 		struct llentry *ln;
177882cd038dSYoshinobu Inoue 		struct in6_addr nb_addr = nbi->addr; /* make local for safety */
177982cd038dSYoshinobu Inoue 
1780a1f7e5f8SHajimu UMEMOTO 		if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0)
1781a1f7e5f8SHajimu UMEMOTO 			return (error);
178282cd038dSYoshinobu Inoue 
178373cb2f38SAndrey V. Elsukov 		IF_AFDATA_RLOCK(ifp);
17846e6b3f7cSQing Li 		ln = nd6_lookup(&nb_addr, 0, ifp);
178573cb2f38SAndrey V. Elsukov 		IF_AFDATA_RUNLOCK(ifp);
17866e6b3f7cSQing Li 
17876e6b3f7cSQing Li 		if (ln == NULL) {
178882cd038dSYoshinobu Inoue 			error = EINVAL;
178982cd038dSYoshinobu Inoue 			break;
179082cd038dSYoshinobu Inoue 		}
179182cd038dSYoshinobu Inoue 		nbi->state = ln->ln_state;
17926e6b3f7cSQing Li 		nbi->asked = ln->la_asked;
179382cd038dSYoshinobu Inoue 		nbi->isrouter = ln->ln_router;
17945a041915SHiroki Sato 		if (ln->la_expire == 0)
17955a041915SHiroki Sato 			nbi->expire = 0;
17965a041915SHiroki Sato 		else
1797427c2f4eSAlexander V. Chernikov 			nbi->expire = ln->la_expire + ln->lle_remtime / hz +
17985a041915SHiroki Sato 			    (time_second - time_uptime);
17996e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
180082cd038dSYoshinobu Inoue 		break;
180182cd038dSYoshinobu Inoue 	}
1802686cdd19SJun-ichiro itojun Hagino 	case SIOCGDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1803603724d3SBjoern A. Zeeb 		ndif->ifindex = V_nd6_defifindex;
1804686cdd19SJun-ichiro itojun Hagino 		break;
1805686cdd19SJun-ichiro itojun Hagino 	case SIOCSDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1806686cdd19SJun-ichiro itojun Hagino 		return (nd6_setdefaultiface(ndif->ifindex));
180782cd038dSYoshinobu Inoue 	}
180882cd038dSYoshinobu Inoue 	return (error);
180982cd038dSYoshinobu Inoue }
181082cd038dSYoshinobu Inoue 
181182cd038dSYoshinobu Inoue /*
18120e2dcee6SAlexander V. Chernikov  * Calculates new isRouter value based on provided parameters and
18130e2dcee6SAlexander V. Chernikov  * returns it.
18140e2dcee6SAlexander V. Chernikov  */
18150e2dcee6SAlexander V. Chernikov static int
18160e2dcee6SAlexander V. Chernikov nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr,
18170e2dcee6SAlexander V. Chernikov     int ln_router)
18180e2dcee6SAlexander V. Chernikov {
18190e2dcee6SAlexander V. Chernikov 
18200e2dcee6SAlexander V. Chernikov 	/*
18210e2dcee6SAlexander V. Chernikov 	 * ICMP6 type dependent behavior.
18220e2dcee6SAlexander V. Chernikov 	 *
18230e2dcee6SAlexander V. Chernikov 	 * NS: clear IsRouter if new entry
18240e2dcee6SAlexander V. Chernikov 	 * RS: clear IsRouter
18250e2dcee6SAlexander V. Chernikov 	 * RA: set IsRouter if there's lladdr
18260e2dcee6SAlexander V. Chernikov 	 * redir: clear IsRouter if new entry
18270e2dcee6SAlexander V. Chernikov 	 *
18280e2dcee6SAlexander V. Chernikov 	 * RA case, (1):
18290e2dcee6SAlexander V. Chernikov 	 * The spec says that we must set IsRouter in the following cases:
18300e2dcee6SAlexander V. Chernikov 	 * - If lladdr exist, set IsRouter.  This means (1-5).
18310e2dcee6SAlexander V. Chernikov 	 * - If it is old entry (!newentry), set IsRouter.  This means (7).
18320e2dcee6SAlexander V. Chernikov 	 * So, based on the spec, in (1-5) and (7) cases we must set IsRouter.
18330e2dcee6SAlexander V. Chernikov 	 * A quetion arises for (1) case.  (1) case has no lladdr in the
18340e2dcee6SAlexander V. Chernikov 	 * neighbor cache, this is similar to (6).
18350e2dcee6SAlexander V. Chernikov 	 * This case is rare but we figured that we MUST NOT set IsRouter.
18360e2dcee6SAlexander V. Chernikov 	 *
183741a31e78SAlexander V. Chernikov 	 *   is_new  old_addr new_addr 	    NS  RS  RA	redir
18380e2dcee6SAlexander V. Chernikov 	 *							D R
183941a31e78SAlexander V. Chernikov 	 *	0	n	n	(1)	c   ?     s
184041a31e78SAlexander V. Chernikov 	 *	0	y	n	(2)	c   s     s
184141a31e78SAlexander V. Chernikov 	 *	0	n	y	(3)	c   s     s
184241a31e78SAlexander V. Chernikov 	 *	0	y	y	(4)	c   s     s
184341a31e78SAlexander V. Chernikov 	 *	0	y	y	(5)	c   s     s
184441a31e78SAlexander V. Chernikov 	 *	1	--	n	(6) c	c	c s
184541a31e78SAlexander V. Chernikov 	 *	1	--	y	(7) c	c   s	c s
18460e2dcee6SAlexander V. Chernikov 	 *
18470e2dcee6SAlexander V. Chernikov 	 *					(c=clear s=set)
18480e2dcee6SAlexander V. Chernikov 	 */
18490e2dcee6SAlexander V. Chernikov 	switch (type & 0xff) {
18500e2dcee6SAlexander V. Chernikov 	case ND_NEIGHBOR_SOLICIT:
18510e2dcee6SAlexander V. Chernikov 		/*
18520e2dcee6SAlexander V. Chernikov 		 * New entry must have is_router flag cleared.
18530e2dcee6SAlexander V. Chernikov 		 */
18540e2dcee6SAlexander V. Chernikov 		if (is_new)					/* (6-7) */
18550e2dcee6SAlexander V. Chernikov 			ln_router = 0;
18560e2dcee6SAlexander V. Chernikov 		break;
18570e2dcee6SAlexander V. Chernikov 	case ND_REDIRECT:
18580e2dcee6SAlexander V. Chernikov 		/*
18590e2dcee6SAlexander V. Chernikov 		 * If the icmp is a redirect to a better router, always set the
18600e2dcee6SAlexander V. Chernikov 		 * is_router flag.  Otherwise, if the entry is newly created,
18610e2dcee6SAlexander V. Chernikov 		 * clear the flag.  [RFC 2461, sec 8.3]
18620e2dcee6SAlexander V. Chernikov 		 */
18630e2dcee6SAlexander V. Chernikov 		if (code == ND_REDIRECT_ROUTER)
18640e2dcee6SAlexander V. Chernikov 			ln_router = 1;
18650e2dcee6SAlexander V. Chernikov 		else {
18660e2dcee6SAlexander V. Chernikov 			if (is_new)				/* (6-7) */
18670e2dcee6SAlexander V. Chernikov 				ln_router = 0;
18680e2dcee6SAlexander V. Chernikov 		}
18690e2dcee6SAlexander V. Chernikov 		break;
18700e2dcee6SAlexander V. Chernikov 	case ND_ROUTER_SOLICIT:
18710e2dcee6SAlexander V. Chernikov 		/*
18720e2dcee6SAlexander V. Chernikov 		 * is_router flag must always be cleared.
18730e2dcee6SAlexander V. Chernikov 		 */
18740e2dcee6SAlexander V. Chernikov 		ln_router = 0;
18750e2dcee6SAlexander V. Chernikov 		break;
18760e2dcee6SAlexander V. Chernikov 	case ND_ROUTER_ADVERT:
18770e2dcee6SAlexander V. Chernikov 		/*
18780e2dcee6SAlexander V. Chernikov 		 * Mark an entry with lladdr as a router.
18790e2dcee6SAlexander V. Chernikov 		 */
18800e2dcee6SAlexander V. Chernikov 		if ((!is_new && (old_addr || new_addr)) ||	/* (2-5) */
18810e2dcee6SAlexander V. Chernikov 		    (is_new && new_addr)) {			/* (7) */
18820e2dcee6SAlexander V. Chernikov 			ln_router = 1;
18830e2dcee6SAlexander V. Chernikov 		}
18840e2dcee6SAlexander V. Chernikov 		break;
18850e2dcee6SAlexander V. Chernikov 	}
18860e2dcee6SAlexander V. Chernikov 
18870e2dcee6SAlexander V. Chernikov 	return (ln_router);
18880e2dcee6SAlexander V. Chernikov }
18890e2dcee6SAlexander V. Chernikov 
18900e2dcee6SAlexander V. Chernikov /*
189182cd038dSYoshinobu Inoue  * Create neighbor cache entry and cache link-layer address,
189282cd038dSYoshinobu Inoue  * on reception of inbound ND6 packets.  (RS/RA/NS/redirect)
18931272577eSXin LI  *
18941272577eSXin LI  * type - ICMP6 type
18951272577eSXin LI  * code - type dependent information
18966e6b3f7cSQing Li  *
189782cd038dSYoshinobu Inoue  */
18980e2dcee6SAlexander V. Chernikov void
18991272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr,
19001272577eSXin LI     int lladdrlen, int type, int code)
190182cd038dSYoshinobu Inoue {
19025a255516SAlexander V. Chernikov 	struct llentry *ln = NULL, *ln_tmp;
190382cd038dSYoshinobu Inoue 	int is_newentry;
190482cd038dSYoshinobu Inoue 	int do_update;
190582cd038dSYoshinobu Inoue 	int olladdr;
190682cd038dSYoshinobu Inoue 	int llchange;
190768352503SBjoern A. Zeeb 	int flags;
19083d3728e9SQing Li 	uint16_t router = 0;
19096e6b3f7cSQing Li 	struct sockaddr_in6 sin6;
1910fd14c50bSKip Macy 	struct mbuf *chain = NULL;
19114fb3a820SAlexander V. Chernikov 	u_char linkhdr[LLE_MAX_LINKHDR];
19124fb3a820SAlexander V. Chernikov 	size_t linkhdrsize;
19134fb3a820SAlexander V. Chernikov 	int lladdr_off;
19146e6b3f7cSQing Li 
19156e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
191682cd038dSYoshinobu Inoue 
191739e19560SBjoern A. Zeeb 	KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__));
191839e19560SBjoern A. Zeeb 	KASSERT(from != NULL, ("%s: from == NULL", __func__));
191982cd038dSYoshinobu Inoue 
192082cd038dSYoshinobu Inoue 	/* nothing must be updated for unspecified address */
192182cd038dSYoshinobu Inoue 	if (IN6_IS_ADDR_UNSPECIFIED(from))
19220e2dcee6SAlexander V. Chernikov 		return;
192382cd038dSYoshinobu Inoue 
192482cd038dSYoshinobu Inoue 	/*
192582cd038dSYoshinobu Inoue 	 * Validation about ifp->if_addrlen and lladdrlen must be done in
192682cd038dSYoshinobu Inoue 	 * the caller.
192782cd038dSYoshinobu Inoue 	 *
192882cd038dSYoshinobu Inoue 	 * XXX If the link does not have link-layer adderss, what should
192982cd038dSYoshinobu Inoue 	 * we do? (ifp->if_addrlen == 0)
193082cd038dSYoshinobu Inoue 	 * Spec says nothing in sections for RA, RS and NA.  There's small
193182cd038dSYoshinobu Inoue 	 * description on it in NS section (RFC 2461 7.2.3).
193282cd038dSYoshinobu Inoue 	 */
1933f506d933SAlexander V. Chernikov 	flags = lladdr ? LLE_EXCLUSIVE : 0;
1934ea0c3776SAndrey V. Elsukov 	IF_AFDATA_RLOCK(ifp);
19356e6b3f7cSQing Li 	ln = nd6_lookup(from, flags, ifp);
1936ea0c3776SAndrey V. Elsukov 	IF_AFDATA_RUNLOCK(ifp);
19375a255516SAlexander V. Chernikov 	is_newentry = 0;
19386e6b3f7cSQing Li 	if (ln == NULL) {
1939f506d933SAlexander V. Chernikov 		flags |= LLE_EXCLUSIVE;
19405a255516SAlexander V. Chernikov 		ln = nd6_alloc(from, 0, ifp);
19415a255516SAlexander V. Chernikov 		if (ln == NULL)
19420e2dcee6SAlexander V. Chernikov 			return;
1943501adf01SAlexander V. Chernikov 
1944501adf01SAlexander V. Chernikov 		/*
1945501adf01SAlexander V. Chernikov 		 * Since we already know all the data for the new entry,
1946501adf01SAlexander V. Chernikov 		 * fill it before insertion.
1947501adf01SAlexander V. Chernikov 		 */
19484fb3a820SAlexander V. Chernikov 		if (lladdr != NULL) {
19494fb3a820SAlexander V. Chernikov 			linkhdrsize = sizeof(linkhdr);
19504fb3a820SAlexander V. Chernikov 			if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
19514fb3a820SAlexander V. Chernikov 			    linkhdr, &linkhdrsize, &lladdr_off) != 0)
19524fb3a820SAlexander V. Chernikov 				return;
19534fb3a820SAlexander V. Chernikov 			lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
19544fb3a820SAlexander V. Chernikov 			    lladdr_off);
19554fb3a820SAlexander V. Chernikov 		}
19564fb3a820SAlexander V. Chernikov 
19575a255516SAlexander V. Chernikov 		IF_AFDATA_WLOCK(ifp);
19585a255516SAlexander V. Chernikov 		LLE_WLOCK(ln);
19595a255516SAlexander V. Chernikov 		/* Prefer any existing lle over newly-created one */
1960f506d933SAlexander V. Chernikov 		ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp);
19615a255516SAlexander V. Chernikov 		if (ln_tmp == NULL)
19625a255516SAlexander V. Chernikov 			lltable_link_entry(LLTABLE6(ifp), ln);
19635a255516SAlexander V. Chernikov 		IF_AFDATA_WUNLOCK(ifp);
19641496229aSAlexander V. Chernikov 		if (ln_tmp == NULL) {
1965ab415c83SAlexander V. Chernikov 			/* No existing lle, mark as new entry (6,7) */
196682cd038dSYoshinobu Inoue 			is_newentry = 1;
1967aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
1968ab415c83SAlexander V. Chernikov 			if (lladdr != NULL)	/* (7) */
1969ab415c83SAlexander V. Chernikov 				EVENTHANDLER_INVOKE(lle_event, ln,
1970ab415c83SAlexander V. Chernikov 				    LLENTRY_RESOLVED);
19711496229aSAlexander V. Chernikov 		} else {
19725a255516SAlexander V. Chernikov 			lltable_free_entry(LLTABLE6(ifp), ln);
19735a255516SAlexander V. Chernikov 			ln = ln_tmp;
19745a255516SAlexander V. Chernikov 			ln_tmp = NULL;
19755a255516SAlexander V. Chernikov 		}
19765a255516SAlexander V. Chernikov 	}
197733841545SHajimu UMEMOTO 	/* do nothing if static ndp is set */
19785a255516SAlexander V. Chernikov 	if ((ln->la_flags & LLE_STATIC)) {
1979f506d933SAlexander V. Chernikov 		if (flags & LLE_EXCLUSIVE)
19800e2dcee6SAlexander V. Chernikov 			LLE_WUNLOCK(ln);
19810e2dcee6SAlexander V. Chernikov 		else
19820e2dcee6SAlexander V. Chernikov 			LLE_RUNLOCK(ln);
19830e2dcee6SAlexander V. Chernikov 		return;
19843d3728e9SQing Li 	}
198582cd038dSYoshinobu Inoue 
19866e6b3f7cSQing Li 	olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0;
198782cd038dSYoshinobu Inoue 	if (olladdr && lladdr) {
19884fb3a820SAlexander V. Chernikov 		llchange = bcmp(lladdr, ln->ll_addr,
19896e6b3f7cSQing Li 		    ifp->if_addrlen);
199041a31e78SAlexander V. Chernikov 	} else if (!olladdr && lladdr)
199141a31e78SAlexander V. Chernikov 		llchange = 1;
199241a31e78SAlexander V. Chernikov 	else
199382cd038dSYoshinobu Inoue 		llchange = 0;
199482cd038dSYoshinobu Inoue 
199582cd038dSYoshinobu Inoue 	/*
199682cd038dSYoshinobu Inoue 	 * newentry olladdr  lladdr  llchange	(*=record)
199782cd038dSYoshinobu Inoue 	 *	0	n	n	--	(1)
199882cd038dSYoshinobu Inoue 	 *	0	y	n	--	(2)
199941a31e78SAlexander V. Chernikov 	 *	0	n	y	y	(3) * STALE
200082cd038dSYoshinobu Inoue 	 *	0	y	y	n	(4) *
200182cd038dSYoshinobu Inoue 	 *	0	y	y	y	(5) * STALE
200282cd038dSYoshinobu Inoue 	 *	1	--	n	--	(6)   NOSTATE(= PASSIVE)
200382cd038dSYoshinobu Inoue 	 *	1	--	y	--	(7) * STALE
200482cd038dSYoshinobu Inoue 	 */
200582cd038dSYoshinobu Inoue 
2006501adf01SAlexander V. Chernikov 	do_update = 0;
20077503e0c7SAlexander V. Chernikov 	if (is_newentry == 0 && llchange != 0) {
2008501adf01SAlexander V. Chernikov 		do_update = 1;	/* (3,5) */
2009501adf01SAlexander V. Chernikov 
201082cd038dSYoshinobu Inoue 		/*
201182cd038dSYoshinobu Inoue 		 * Record source link-layer address
201282cd038dSYoshinobu Inoue 		 * XXX is it dependent to ifp->if_type?
201382cd038dSYoshinobu Inoue 		 */
20144fb3a820SAlexander V. Chernikov 		linkhdrsize = sizeof(linkhdr);
20154fb3a820SAlexander V. Chernikov 		if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
20164fb3a820SAlexander V. Chernikov 		    linkhdr, &linkhdrsize, &lladdr_off) != 0)
20174fb3a820SAlexander V. Chernikov 			return;
20184fb3a820SAlexander V. Chernikov 
20194fb3a820SAlexander V. Chernikov 		if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
20204fb3a820SAlexander V. Chernikov 		    lladdr_off) == 0) {
202112cb7521SAlexander V. Chernikov 			/* Entry was deleted */
202212cb7521SAlexander V. Chernikov 			return;
202312cb7521SAlexander V. Chernikov 		}
202412cb7521SAlexander V. Chernikov 
2025aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
202682cd038dSYoshinobu Inoue 
2027501adf01SAlexander V. Chernikov 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
202882cd038dSYoshinobu Inoue 
2029d7968c29SAlexander V. Chernikov 		if (ln->la_hold != NULL)
2030d7968c29SAlexander V. Chernikov 			nd6_grab_holdchain(ln, &chain, &sin6);
203182cd038dSYoshinobu Inoue 	}
203282cd038dSYoshinobu Inoue 
20330e2dcee6SAlexander V. Chernikov 	/* Calculates new router status */
20340e2dcee6SAlexander V. Chernikov 	router = nd6_is_router(type, code, is_newentry, olladdr,
20350e2dcee6SAlexander V. Chernikov 	    lladdr != NULL ? 1 : 0, ln->ln_router);
203682cd038dSYoshinobu Inoue 
20370e2dcee6SAlexander V. Chernikov 	ln->ln_router = router;
20380e2dcee6SAlexander V. Chernikov 	/* Mark non-router redirects with special flag */
20390e2dcee6SAlexander V. Chernikov 	if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER)
20400e2dcee6SAlexander V. Chernikov 		ln->la_flags |= LLE_REDIRECT;
2041c2b3a02bSKip Macy 
2042f506d933SAlexander V. Chernikov 	if (flags & LLE_EXCLUSIVE)
20436e6b3f7cSQing Li 		LLE_WUNLOCK(ln);
20446e6b3f7cSQing Li 	else
20456e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
20460e2dcee6SAlexander V. Chernikov 
2047d7968c29SAlexander V. Chernikov 	if (chain != NULL)
2048d7968c29SAlexander V. Chernikov 		nd6_flush_holdchain(ifp, ifp, chain, &sin6);
20496e6b3f7cSQing Li 
2050554bf4aaSHajimu UMEMOTO 	/*
2051554bf4aaSHajimu UMEMOTO 	 * When the link-layer address of a router changes, select the
2052554bf4aaSHajimu UMEMOTO 	 * best router again.  In particular, when the neighbor entry is newly
2053554bf4aaSHajimu UMEMOTO 	 * created, it might affect the selection policy.
2054554bf4aaSHajimu UMEMOTO 	 * Question: can we restrict the first condition to the "is_newentry"
2055554bf4aaSHajimu UMEMOTO 	 * case?
2056554bf4aaSHajimu UMEMOTO 	 * XXX: when we hear an RA from a new router with the link-layer
2057554bf4aaSHajimu UMEMOTO 	 * address option, defrouter_select() is called twice, since
2058554bf4aaSHajimu UMEMOTO 	 * defrtrlist_update called the function as well.  However, I believe
2059554bf4aaSHajimu UMEMOTO 	 * we can compromise the overhead, since it only happens the first
2060554bf4aaSHajimu UMEMOTO 	 * time.
2061554bf4aaSHajimu UMEMOTO 	 * XXX: although defrouter_select() should not have a bad effect
2062554bf4aaSHajimu UMEMOTO 	 * for those are not autoconfigured hosts, we explicitly avoid such
2063554bf4aaSHajimu UMEMOTO 	 * cases for safety.
2064554bf4aaSHajimu UMEMOTO 	 */
2065501adf01SAlexander V. Chernikov 	if ((do_update || is_newentry) && router &&
2066a283298cSHiroki Sato 	    ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
20676e6b3f7cSQing Li 		/*
20686e6b3f7cSQing Li 		 * guaranteed recursion
20696e6b3f7cSQing Li 		 */
2070554bf4aaSHajimu UMEMOTO 		defrouter_select();
20716e6b3f7cSQing Li 	}
207282cd038dSYoshinobu Inoue }
207382cd038dSYoshinobu Inoue 
207482cd038dSYoshinobu Inoue static void
20758b615593SMarko Zec nd6_slowtimo(void *arg)
207682cd038dSYoshinobu Inoue {
20778b615593SMarko Zec 	CURVNET_SET((struct vnet *) arg);
207833841545SHajimu UMEMOTO 	struct nd_ifinfo *nd6if;
207931b1bfe1SHajimu UMEMOTO 	struct ifnet *ifp;
208082cd038dSYoshinobu Inoue 
2081603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
2082f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
208377dfcdc4SRobert Watson 	IFNET_RLOCK_NOSLEEP();
2084e6abaf91SGleb Smirnoff 	TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
20850de0dd9bSHiroki Sato 		if (ifp->if_afdata[AF_INET6] == NULL)
20860de0dd9bSHiroki Sato 			continue;
208731b1bfe1SHajimu UMEMOTO 		nd6if = ND_IFINFO(ifp);
208882cd038dSYoshinobu Inoue 		if (nd6if->basereachable && /* already initialized */
208982cd038dSYoshinobu Inoue 		    (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
209082cd038dSYoshinobu Inoue 			/*
209182cd038dSYoshinobu Inoue 			 * Since reachable time rarely changes by router
209282cd038dSYoshinobu Inoue 			 * advertisements, we SHOULD insure that a new random
209382cd038dSYoshinobu Inoue 			 * value gets recomputed at least once every few hours.
209482cd038dSYoshinobu Inoue 			 * (RFC 2461, 6.3.4)
209582cd038dSYoshinobu Inoue 			 */
2096603724d3SBjoern A. Zeeb 			nd6if->recalctm = V_nd6_recalc_reachtm_interval;
209782cd038dSYoshinobu Inoue 			nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable);
209882cd038dSYoshinobu Inoue 		}
209982cd038dSYoshinobu Inoue 	}
210077dfcdc4SRobert Watson 	IFNET_RUNLOCK_NOSLEEP();
21018b615593SMarko Zec 	CURVNET_RESTORE();
210282cd038dSYoshinobu Inoue }
210382cd038dSYoshinobu Inoue 
2104d7968c29SAlexander V. Chernikov void
2105d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain,
2106d7968c29SAlexander V. Chernikov     struct sockaddr_in6 *sin6)
2107d7968c29SAlexander V. Chernikov {
2108d7968c29SAlexander V. Chernikov 
2109d7968c29SAlexander V. Chernikov 	LLE_WLOCK_ASSERT(ln);
2110d7968c29SAlexander V. Chernikov 
2111d7968c29SAlexander V. Chernikov 	*chain = ln->la_hold;
2112d7968c29SAlexander V. Chernikov 	ln->la_hold = NULL;
2113314294deSAlexander V. Chernikov 	lltable_fill_sa_entry(ln, (struct sockaddr *)sin6);
2114d7968c29SAlexander V. Chernikov 
2115d7968c29SAlexander V. Chernikov 	if (ln->ln_state == ND6_LLINFO_STALE) {
2116d7968c29SAlexander V. Chernikov 
2117d7968c29SAlexander V. Chernikov 		/*
2118d7968c29SAlexander V. Chernikov 		 * The first time we send a packet to a
2119d7968c29SAlexander V. Chernikov 		 * neighbor whose entry is STALE, we have
2120d7968c29SAlexander V. Chernikov 		 * to change the state to DELAY and a sets
2121d7968c29SAlexander V. Chernikov 		 * a timer to expire in DELAY_FIRST_PROBE_TIME
2122d7968c29SAlexander V. Chernikov 		 * seconds to ensure do neighbor unreachability
2123d7968c29SAlexander V. Chernikov 		 * detection on expiration.
2124d7968c29SAlexander V. Chernikov 		 * (RFC 2461 7.3.3)
2125d7968c29SAlexander V. Chernikov 		 */
2126aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY);
2127d7968c29SAlexander V. Chernikov 	}
2128d7968c29SAlexander V. Chernikov }
2129d7968c29SAlexander V. Chernikov 
21301fe201c3SAlexander V. Chernikov int
2131d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m,
2132637670e7SAlexander V. Chernikov     struct sockaddr_in6 *dst, struct route *ro)
2133d7968c29SAlexander V. Chernikov {
2134d7968c29SAlexander V. Chernikov 	int error;
2135d7968c29SAlexander V. Chernikov 	int ip6len;
2136d7968c29SAlexander V. Chernikov 	struct ip6_hdr *ip6;
2137d7968c29SAlexander V. Chernikov 	struct m_tag *mtag;
2138d7968c29SAlexander V. Chernikov 
2139d7968c29SAlexander V. Chernikov #ifdef MAC
2140d7968c29SAlexander V. Chernikov 	mac_netinet6_nd6_send(ifp, m);
2141d7968c29SAlexander V. Chernikov #endif
2142d7968c29SAlexander V. Chernikov 
2143d7968c29SAlexander V. Chernikov 	/*
2144d7968c29SAlexander V. Chernikov 	 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
2145d7968c29SAlexander V. Chernikov 	 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
2146d7968c29SAlexander V. Chernikov 	 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
2147d7968c29SAlexander V. Chernikov 	 * to be diverted to user space.  When re-injected into the kernel,
2148d7968c29SAlexander V. Chernikov 	 * send_output() will directly dispatch them to the outgoing interface.
2149d7968c29SAlexander V. Chernikov 	 */
2150d7968c29SAlexander V. Chernikov 	if (send_sendso_input_hook != NULL) {
2151d7968c29SAlexander V. Chernikov 		mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
2152d7968c29SAlexander V. Chernikov 		if (mtag != NULL) {
2153d7968c29SAlexander V. Chernikov 			ip6 = mtod(m, struct ip6_hdr *);
2154d7968c29SAlexander V. Chernikov 			ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
2155d7968c29SAlexander V. Chernikov 			/* Use the SEND socket */
2156d7968c29SAlexander V. Chernikov 			error = send_sendso_input_hook(m, ifp, SND_OUT,
2157d7968c29SAlexander V. Chernikov 			    ip6len);
2158d7968c29SAlexander V. Chernikov 			/* -1 == no app on SEND socket */
2159d7968c29SAlexander V. Chernikov 			if (error == 0 || error != -1)
2160d7968c29SAlexander V. Chernikov 			    return (error);
2161d7968c29SAlexander V. Chernikov 		}
2162d7968c29SAlexander V. Chernikov 	}
2163d7968c29SAlexander V. Chernikov 
2164d7968c29SAlexander V. Chernikov 	m_clrprotoflags(m);	/* Avoid confusing lower layers. */
2165d7968c29SAlexander V. Chernikov 	IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
2166d7968c29SAlexander V. Chernikov 	    mtod(m, struct ip6_hdr *));
2167d7968c29SAlexander V. Chernikov 
2168d7968c29SAlexander V. Chernikov 	if ((ifp->if_flags & IFF_LOOPBACK) == 0)
2169d7968c29SAlexander V. Chernikov 		origifp = ifp;
2170d7968c29SAlexander V. Chernikov 
2171637670e7SAlexander V. Chernikov 	error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro);
2172d7968c29SAlexander V. Chernikov 	return (error);
2173d7968c29SAlexander V. Chernikov }
2174d7968c29SAlexander V. Chernikov 
2175f6990c4eSAlexander V. Chernikov /*
21764fb3a820SAlexander V. Chernikov  * Lookup link headerfor @sa_dst address. Stores found
21774fb3a820SAlexander V. Chernikov  * data in @desten buffer. Copy of lle ln_flags can be also
21781fe201c3SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
21791fe201c3SAlexander V. Chernikov  *
21801fe201c3SAlexander V. Chernikov  * If destination LLE does not exists or lle state modification
21811fe201c3SAlexander V. Chernikov  * is required, call "slow" version.
21821fe201c3SAlexander V. Chernikov  *
21831fe201c3SAlexander V. Chernikov  * Return values:
21841fe201c3SAlexander V. Chernikov  * - 0 on success (address copied to buffer).
21851fe201c3SAlexander V. Chernikov  * - EWOULDBLOCK (no local error, but address is still unresolved)
21861fe201c3SAlexander V. Chernikov  * - other errors (alloc failure, etc)
2187f6990c4eSAlexander V. Chernikov  */
218882cd038dSYoshinobu Inoue int
21891fe201c3SAlexander V. Chernikov nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
21906d768226SGeorge V. Neville-Neil     const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags,
21916d768226SGeorge V. Neville-Neil     struct llentry **plle)
219282cd038dSYoshinobu Inoue {
2193f6990c4eSAlexander V. Chernikov 	struct llentry *ln = NULL;
21941fe201c3SAlexander V. Chernikov 	const struct sockaddr_in6 *dst6;
21951fe201c3SAlexander V. Chernikov 
21961fe201c3SAlexander V. Chernikov 	if (pflags != NULL)
21971fe201c3SAlexander V. Chernikov 		*pflags = 0;
21981fe201c3SAlexander V. Chernikov 
21991fe201c3SAlexander V. Chernikov 	dst6 = (const struct sockaddr_in6 *)sa_dst;
22006e6b3f7cSQing Li 
2201f6990c4eSAlexander V. Chernikov 	/* discard the packet if IPv6 operation is disabled on the interface */
2202f6990c4eSAlexander V. Chernikov 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
2203f6990c4eSAlexander V. Chernikov 		m_freem(m);
2204f6990c4eSAlexander V. Chernikov 		return (ENETDOWN); /* better error? */
2205f6990c4eSAlexander V. Chernikov 	}
2206f6990c4eSAlexander V. Chernikov 
22071fe201c3SAlexander V. Chernikov 	if (m != NULL && m->m_flags & M_MCAST) {
22081fe201c3SAlexander V. Chernikov 		switch (ifp->if_type) {
22091fe201c3SAlexander V. Chernikov 		case IFT_ETHER:
22101fe201c3SAlexander V. Chernikov 		case IFT_FDDI:
22111fe201c3SAlexander V. Chernikov 		case IFT_L2VLAN:
22121fe201c3SAlexander V. Chernikov 		case IFT_IEEE80211:
22131fe201c3SAlexander V. Chernikov 		case IFT_BRIDGE:
22141fe201c3SAlexander V. Chernikov 		case IFT_ISO88025:
22151fe201c3SAlexander V. Chernikov 			ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr,
22161fe201c3SAlexander V. Chernikov 						 desten);
22171fe201c3SAlexander V. Chernikov 			return (0);
22181fe201c3SAlexander V. Chernikov 		default:
22191fe201c3SAlexander V. Chernikov 			m_freem(m);
22201fe201c3SAlexander V. Chernikov 			return (EAFNOSUPPORT);
22211fe201c3SAlexander V. Chernikov 		}
22221fe201c3SAlexander V. Chernikov 	}
2223f6990c4eSAlexander V. Chernikov 
2224f6990c4eSAlexander V. Chernikov 	IF_AFDATA_RLOCK(ifp);
2225ea17754cSMike Karels 	ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED,
2226ea17754cSMike Karels 	    ifp);
222712cb7521SAlexander V. Chernikov 	if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) {
222812cb7521SAlexander V. Chernikov 		/* Entry found, let's copy lle info */
22294fb3a820SAlexander V. Chernikov 		bcopy(ln->r_linkdata, desten, ln->r_hdrlen);
22301fe201c3SAlexander V. Chernikov 		if (pflags != NULL)
223112cb7521SAlexander V. Chernikov 			*pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR);
223212cb7521SAlexander V. Chernikov 		/* Check if we have feedback request from nd6 timer */
223312cb7521SAlexander V. Chernikov 		if (ln->r_skip_req != 0) {
223412cb7521SAlexander V. Chernikov 			LLE_REQ_LOCK(ln);
223512cb7521SAlexander V. Chernikov 			ln->r_skip_req = 0; /* Notify that entry was used */
223612cb7521SAlexander V. Chernikov 			ln->lle_hittime = time_uptime;
223712cb7521SAlexander V. Chernikov 			LLE_REQ_UNLOCK(ln);
223812cb7521SAlexander V. Chernikov 		}
2239ea17754cSMike Karels 		if (plle) {
2240ea17754cSMike Karels 			LLE_ADDREF(ln);
2241ea17754cSMike Karels 			*plle = ln;
2242ea17754cSMike Karels 			LLE_WUNLOCK(ln);
2243ea17754cSMike Karels 		}
224412cb7521SAlexander V. Chernikov 		IF_AFDATA_RUNLOCK(ifp);
22451fe201c3SAlexander V. Chernikov 		return (0);
2246ea17754cSMike Karels 	} else if (plle && ln)
2247ea17754cSMike Karels 		LLE_WUNLOCK(ln);
224812cb7521SAlexander V. Chernikov 	IF_AFDATA_RUNLOCK(ifp);
224912cb7521SAlexander V. Chernikov 
22506d768226SGeorge V. Neville-Neil 	return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle));
225112cb7521SAlexander V. Chernikov }
22526e6b3f7cSQing Li 
22536e6b3f7cSQing Li 
22546e6b3f7cSQing Li /*
22551fe201c3SAlexander V. Chernikov  * Do L2 address resolution for @sa_dst address. Stores found
22561fe201c3SAlexander V. Chernikov  * address in @desten buffer. Copy of lle ln_flags can be also
22571fe201c3SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
22586e6b3f7cSQing Li  *
22591fe201c3SAlexander V. Chernikov  * Heavy version.
22601fe201c3SAlexander V. Chernikov  * Function assume that destination LLE does not exist,
2261f506d933SAlexander V. Chernikov  * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired.
2262c0b8aeaeSAlexander V. Chernikov  *
2263c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
22646e6b3f7cSQing Li  */
2265c0b8aeaeSAlexander V. Chernikov static __noinline int
22664fb3a820SAlexander V. Chernikov nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m,
22676d768226SGeorge V. Neville-Neil     const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags,
22686d768226SGeorge V. Neville-Neil     struct llentry **plle)
22696e6b3f7cSQing Li {
22705a255516SAlexander V. Chernikov 	struct llentry *lle = NULL, *lle_tmp;
2271aa5f023eSAlexander V. Chernikov 	struct in6_addr *psrc, src;
22724fb3a820SAlexander V. Chernikov 	int send_ns, ll_len;
22734fb3a820SAlexander V. Chernikov 	char *lladdr;
227482cd038dSYoshinobu Inoue 
227582cd038dSYoshinobu Inoue 	/*
227682cd038dSYoshinobu Inoue 	 * Address resolution or Neighbor Unreachability Detection
227782cd038dSYoshinobu Inoue 	 * for the next hop.
227882cd038dSYoshinobu Inoue 	 * At this point, the destination of the packet must be a unicast
227982cd038dSYoshinobu Inoue 	 * or an anycast address(i.e. not a multicast).
228082cd038dSYoshinobu Inoue 	 */
2281f6990c4eSAlexander V. Chernikov 	if (lle == NULL) {
2282c445d252SAdrian Chadd 		IF_AFDATA_RLOCK(ifp);
2283f506d933SAlexander V. Chernikov 		lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2284c445d252SAdrian Chadd 		IF_AFDATA_RUNLOCK(ifp);
2285f6990c4eSAlexander V. Chernikov 		if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp))  {
2286686cdd19SJun-ichiro itojun Hagino 			/*
2287686cdd19SJun-ichiro itojun Hagino 			 * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
2288686cdd19SJun-ichiro itojun Hagino 			 * the condition below is not very efficient.  But we believe
2289686cdd19SJun-ichiro itojun Hagino 			 * it is tolerable, because this should be a rare case.
2290686cdd19SJun-ichiro itojun Hagino 			 */
22915a255516SAlexander V. Chernikov 			lle = nd6_alloc(&dst->sin6_addr, 0, ifp);
2292f6990c4eSAlexander V. Chernikov 			if (lle == NULL) {
22931d54aa3bSBjoern A. Zeeb 				char ip6buf[INET6_ADDRSTRLEN];
2294686cdd19SJun-ichiro itojun Hagino 				log(LOG_DEBUG,
2295686cdd19SJun-ichiro itojun Hagino 				    "nd6_output: can't allocate llinfo for %s "
2296bbd8aebaSQing Li 				    "(ln=%p)\n",
2297f6990c4eSAlexander V. Chernikov 				    ip6_sprintf(ip6buf, &dst->sin6_addr), lle);
22989dffa6a3SAlexander V. Chernikov 				m_freem(m);
22999dffa6a3SAlexander V. Chernikov 				return (ENOBUFS);
230082cd038dSYoshinobu Inoue 			}
23015a255516SAlexander V. Chernikov 
23025a255516SAlexander V. Chernikov 			IF_AFDATA_WLOCK(ifp);
23035a255516SAlexander V. Chernikov 			LLE_WLOCK(lle);
23045a255516SAlexander V. Chernikov 			/* Prefer any existing entry over newly-created one */
2305f506d933SAlexander V. Chernikov 			lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
23065a255516SAlexander V. Chernikov 			if (lle_tmp == NULL)
23075a255516SAlexander V. Chernikov 				lltable_link_entry(LLTABLE6(ifp), lle);
23085a255516SAlexander V. Chernikov 			IF_AFDATA_WUNLOCK(ifp);
23095a255516SAlexander V. Chernikov 			if (lle_tmp != NULL) {
23105a255516SAlexander V. Chernikov 				lltable_free_entry(LLTABLE6(ifp), lle);
23115a255516SAlexander V. Chernikov 				lle = lle_tmp;
23125a255516SAlexander V. Chernikov 				lle_tmp = NULL;
23135a255516SAlexander V. Chernikov 			}
23145a255516SAlexander V. Chernikov 		}
23155a255516SAlexander V. Chernikov 	}
23165a255516SAlexander V. Chernikov 	if (lle == NULL) {
23171fe201c3SAlexander V. Chernikov 		if (!(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) {
23185a255516SAlexander V. Chernikov 			m_freem(m);
23195a255516SAlexander V. Chernikov 			return (ENOBUFS);
23205a255516SAlexander V. Chernikov 		}
23211fe201c3SAlexander V. Chernikov 
23221fe201c3SAlexander V. Chernikov 		if (m != NULL)
23231fe201c3SAlexander V. Chernikov 			m_freem(m);
23241fe201c3SAlexander V. Chernikov 		return (ENOBUFS);
2325686cdd19SJun-ichiro itojun Hagino 	}
2326686cdd19SJun-ichiro itojun Hagino 
2327f6990c4eSAlexander V. Chernikov 	LLE_WLOCK_ASSERT(lle);
2328f6990c4eSAlexander V. Chernikov 
232982cd038dSYoshinobu Inoue 	/*
233082cd038dSYoshinobu Inoue 	 * The first time we send a packet to a neighbor whose entry is
233182cd038dSYoshinobu Inoue 	 * STALE, we have to change the state to DELAY and a sets a timer to
233282cd038dSYoshinobu Inoue 	 * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do
233382cd038dSYoshinobu Inoue 	 * neighbor unreachability detection on expiration.
233482cd038dSYoshinobu Inoue 	 * (RFC 2461 7.3.3)
233582cd038dSYoshinobu Inoue 	 */
2336aa5f023eSAlexander V. Chernikov 	if (lle->ln_state == ND6_LLINFO_STALE)
2337aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY);
233882cd038dSYoshinobu Inoue 
233982cd038dSYoshinobu Inoue 	/*
234082cd038dSYoshinobu Inoue 	 * If the neighbor cache entry has a state other than INCOMPLETE
234188ff5695SSUZUKI Shinsuke 	 * (i.e. its link-layer address is already resolved), just
234282cd038dSYoshinobu Inoue 	 * send the packet.
234382cd038dSYoshinobu Inoue 	 */
23441fe201c3SAlexander V. Chernikov 	if (lle->ln_state > ND6_LLINFO_INCOMPLETE) {
23454fb3a820SAlexander V. Chernikov 		if (flags & LLE_ADDRONLY) {
23464fb3a820SAlexander V. Chernikov 			lladdr = lle->ll_addr;
23474fb3a820SAlexander V. Chernikov 			ll_len = ifp->if_addrlen;
23484fb3a820SAlexander V. Chernikov 		} else {
23494fb3a820SAlexander V. Chernikov 			lladdr = lle->r_linkdata;
23504fb3a820SAlexander V. Chernikov 			ll_len = lle->r_hdrlen;
23514fb3a820SAlexander V. Chernikov 		}
23524fb3a820SAlexander V. Chernikov 		bcopy(lladdr, desten, ll_len);
23531fe201c3SAlexander V. Chernikov 		if (pflags != NULL)
23541fe201c3SAlexander V. Chernikov 			*pflags = lle->la_flags;
23556d768226SGeorge V. Neville-Neil 		if (plle) {
23566d768226SGeorge V. Neville-Neil 			LLE_ADDREF(lle);
23576d768226SGeorge V. Neville-Neil 			*plle = lle;
23586d768226SGeorge V. Neville-Neil 		}
23591fe201c3SAlexander V. Chernikov 		LLE_WUNLOCK(lle);
23601fe201c3SAlexander V. Chernikov 		return (0);
23611fe201c3SAlexander V. Chernikov 	}
236282cd038dSYoshinobu Inoue 
236382cd038dSYoshinobu Inoue 	/*
236482cd038dSYoshinobu Inoue 	 * There is a neighbor cache entry, but no ethernet address
2365743eee66SSUZUKI Shinsuke 	 * response yet.  Append this latest packet to the end of the
2366b0ab3725SLuiz Otavio O Souza 	 * packet queue in the mbuf.  When it exceeds nd6_maxqueuelen,
2367743eee66SSUZUKI Shinsuke 	 * the oldest packet in the queue will be removed.
236882cd038dSYoshinobu Inoue 	 */
23696e6b3f7cSQing Li 
2370f6990c4eSAlexander V. Chernikov 	if (lle->la_hold != NULL) {
2371743eee66SSUZUKI Shinsuke 		struct mbuf *m_hold;
2372743eee66SSUZUKI Shinsuke 		int i;
2373743eee66SSUZUKI Shinsuke 
2374743eee66SSUZUKI Shinsuke 		i = 0;
2375f6990c4eSAlexander V. Chernikov 		for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){
2376743eee66SSUZUKI Shinsuke 			i++;
2377743eee66SSUZUKI Shinsuke 			if (m_hold->m_nextpkt == NULL) {
2378743eee66SSUZUKI Shinsuke 				m_hold->m_nextpkt = m;
2379743eee66SSUZUKI Shinsuke 				break;
238082cd038dSYoshinobu Inoue 			}
238182cd038dSYoshinobu Inoue 		}
2382603724d3SBjoern A. Zeeb 		while (i >= V_nd6_maxqueuelen) {
2383f6990c4eSAlexander V. Chernikov 			m_hold = lle->la_hold;
2384f6990c4eSAlexander V. Chernikov 			lle->la_hold = lle->la_hold->m_nextpkt;
238531d4137bSSUZUKI Shinsuke 			m_freem(m_hold);
2386743eee66SSUZUKI Shinsuke 			i--;
2387743eee66SSUZUKI Shinsuke 		}
2388743eee66SSUZUKI Shinsuke 	} else {
2389f6990c4eSAlexander V. Chernikov 		lle->la_hold = m;
23906e6b3f7cSQing Li 	}
2391743eee66SSUZUKI Shinsuke 
2392743eee66SSUZUKI Shinsuke 	/*
2393743eee66SSUZUKI Shinsuke 	 * If there has been no NS for the neighbor after entering the
2394743eee66SSUZUKI Shinsuke 	 * INCOMPLETE state, send the first solicitation.
2395aa5f023eSAlexander V. Chernikov 	 * Note that for newly-created lle la_asked will be 0,
2396aa5f023eSAlexander V. Chernikov 	 * so we will transition from ND6_LLINFO_NOSTATE to
2397aa5f023eSAlexander V. Chernikov 	 * ND6_LLINFO_INCOMPLETE state here.
2398743eee66SSUZUKI Shinsuke 	 */
2399aa5f023eSAlexander V. Chernikov 	psrc = NULL;
2400aa5f023eSAlexander V. Chernikov 	send_ns = 0;
2401aa5f023eSAlexander V. Chernikov 	if (lle->la_asked == 0) {
2402f6990c4eSAlexander V. Chernikov 		lle->la_asked++;
2403aa5f023eSAlexander V. Chernikov 		send_ns = 1;
240426deb882SAlexander V. Chernikov 		psrc = nd6_llinfo_get_holdsrc(lle, &src);
2405aa5f023eSAlexander V. Chernikov 
2406aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE);
2407743eee66SSUZUKI Shinsuke 	}
2408aa5f023eSAlexander V. Chernikov 	LLE_WUNLOCK(lle);
2409aa5f023eSAlexander V. Chernikov 	if (send_ns != 0)
2410aa5f023eSAlexander V. Chernikov 		nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL);
2411e6950476SBjoern A. Zeeb 
24121fe201c3SAlexander V. Chernikov 	return (EWOULDBLOCK);
241382cd038dSYoshinobu Inoue }
241482cd038dSYoshinobu Inoue 
24154fb3a820SAlexander V. Chernikov /*
24164fb3a820SAlexander V. Chernikov  * Do L2 address resolution for @sa_dst address. Stores found
24174fb3a820SAlexander V. Chernikov  * address in @desten buffer. Copy of lle ln_flags can be also
24184fb3a820SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
24194fb3a820SAlexander V. Chernikov  *
24204fb3a820SAlexander V. Chernikov  * Return values:
24214fb3a820SAlexander V. Chernikov  * - 0 on success (address copied to buffer).
24224fb3a820SAlexander V. Chernikov  * - EWOULDBLOCK (no local error, but address is still unresolved)
24234fb3a820SAlexander V. Chernikov  * - other errors (alloc failure, etc)
24244fb3a820SAlexander V. Chernikov  */
24254fb3a820SAlexander V. Chernikov int
24264fb3a820SAlexander V. Chernikov nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
24274fb3a820SAlexander V. Chernikov     char *desten, uint32_t *pflags)
24284fb3a820SAlexander V. Chernikov {
24294fb3a820SAlexander V. Chernikov 	int error;
24304fb3a820SAlexander V. Chernikov 
24314fb3a820SAlexander V. Chernikov 	flags |= LLE_ADDRONLY;
24324fb3a820SAlexander V. Chernikov 	error = nd6_resolve_slow(ifp, flags, NULL,
24336d768226SGeorge V. Neville-Neil 	    (const struct sockaddr_in6 *)dst, desten, pflags, NULL);
24344fb3a820SAlexander V. Chernikov 	return (error);
24354fb3a820SAlexander V. Chernikov }
24366e6b3f7cSQing Li 
24376e6b3f7cSQing Li int
2438d7968c29SAlexander V. Chernikov nd6_flush_holdchain(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *chain,
24399c9bde01SAlexander V. Chernikov     struct sockaddr_in6 *dst)
24406e6b3f7cSQing Li {
24416e6b3f7cSQing Li 	struct mbuf *m, *m_head;
24426e6b3f7cSQing Li 	struct ifnet *outifp;
24436e6b3f7cSQing Li 	int error = 0;
24446e6b3f7cSQing Li 
24456e6b3f7cSQing Li 	m_head = chain;
24466e6b3f7cSQing Li 	if ((ifp->if_flags & IFF_LOOPBACK) != 0)
24476e6b3f7cSQing Li 		outifp = origifp;
24486e6b3f7cSQing Li 	else
24496e6b3f7cSQing Li 		outifp = ifp;
24506e6b3f7cSQing Li 
24516e6b3f7cSQing Li 	while (m_head) {
24526e6b3f7cSQing Li 		m = m_head;
24536e6b3f7cSQing Li 		m_head = m_head->m_nextpkt;
2454637670e7SAlexander V. Chernikov 		error = nd6_output_ifp(ifp, origifp, m, dst, NULL);
24556e6b3f7cSQing Li 	}
24566e6b3f7cSQing Li 
24576e6b3f7cSQing Li 	/*
24586e6b3f7cSQing Li 	 * XXX
24591fe201c3SAlexander V. Chernikov 	 * note that intermediate errors are blindly ignored
24606e6b3f7cSQing Li 	 */
24616e6b3f7cSQing Li 	return (error);
24626e6b3f7cSQing Li }
24636e6b3f7cSQing Li 
24641fe201c3SAlexander V. Chernikov static int
24651272577eSXin LI nd6_need_cache(struct ifnet *ifp)
246633841545SHajimu UMEMOTO {
246733841545SHajimu UMEMOTO 	/*
246833841545SHajimu UMEMOTO 	 * XXX: we currently do not make neighbor cache on any interface
246933841545SHajimu UMEMOTO 	 * other than ARCnet, Ethernet, FDDI and GIF.
247033841545SHajimu UMEMOTO 	 *
247133841545SHajimu UMEMOTO 	 * RFC2893 says:
247233841545SHajimu UMEMOTO 	 * - unidirectional tunnels needs no ND
247333841545SHajimu UMEMOTO 	 */
247433841545SHajimu UMEMOTO 	switch (ifp->if_type) {
247533841545SHajimu UMEMOTO 	case IFT_ARCNET:
247633841545SHajimu UMEMOTO 	case IFT_ETHER:
247733841545SHajimu UMEMOTO 	case IFT_FDDI:
247833841545SHajimu UMEMOTO 	case IFT_IEEE1394:
247905b6760dSMunechika SUMIKAWA 	case IFT_L2VLAN:
248033841545SHajimu UMEMOTO 	case IFT_IEEE80211:
2481e4cd31ddSJeff Roberson 	case IFT_INFINIBAND:
248259280079SAndrew Thompson 	case IFT_BRIDGE:
2483c57086ceSHajimu UMEMOTO 	case IFT_PROPVIRTUAL:
248433841545SHajimu UMEMOTO 		return (1);
248533841545SHajimu UMEMOTO 	default:
248633841545SHajimu UMEMOTO 		return (0);
248733841545SHajimu UMEMOTO 	}
248833841545SHajimu UMEMOTO }
248933841545SHajimu UMEMOTO 
24906e6b3f7cSQing Li /*
2491f6b84910SAlexander V. Chernikov  * Add pernament ND6 link-layer record for given
2492f6b84910SAlexander V. Chernikov  * interface address.
2493f6b84910SAlexander V. Chernikov  *
2494f6b84910SAlexander V. Chernikov  * Very similar to IPv4 arp_ifinit(), but:
2495f6b84910SAlexander V. Chernikov  * 1) IPv6 DAD is performed in different place
2496f6b84910SAlexander V. Chernikov  * 2) It is called by IPv6 protocol stack in contrast to
2497f6b84910SAlexander V. Chernikov  * arp_ifinit() which is typically called in SIOCSIFADDR
2498f6b84910SAlexander V. Chernikov  * driver ioctl handler.
2499f6b84910SAlexander V. Chernikov  *
2500f6b84910SAlexander V. Chernikov  */
2501f6b84910SAlexander V. Chernikov int
2502f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia)
2503f6b84910SAlexander V. Chernikov {
2504f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
25055a255516SAlexander V. Chernikov 	struct llentry *ln, *ln_tmp;
25065a255516SAlexander V. Chernikov 	struct sockaddr *dst;
2507f6b84910SAlexander V. Chernikov 
2508f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2509af6209a1SAndrey V. Elsukov 	if (nd6_need_cache(ifp) == 0)
2510af6209a1SAndrey V. Elsukov 		return (0);
25115a255516SAlexander V. Chernikov 
2512f6b84910SAlexander V. Chernikov 	ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
25135a255516SAlexander V. Chernikov 	dst = (struct sockaddr *)&ia->ia_addr;
25145a255516SAlexander V. Chernikov 	ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst);
25155a255516SAlexander V. Chernikov 	if (ln == NULL)
25165a255516SAlexander V. Chernikov 		return (ENOBUFS);
25175a255516SAlexander V. Chernikov 
25185a255516SAlexander V. Chernikov 	IF_AFDATA_WLOCK(ifp);
25195a255516SAlexander V. Chernikov 	LLE_WLOCK(ln);
25205a255516SAlexander V. Chernikov 	/* Unlink any entry if exists */
25215a255516SAlexander V. Chernikov 	ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst);
25225a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25235a255516SAlexander V. Chernikov 		lltable_unlink_entry(LLTABLE6(ifp), ln_tmp);
25245a255516SAlexander V. Chernikov 	lltable_link_entry(LLTABLE6(ifp), ln);
25255a255516SAlexander V. Chernikov 	IF_AFDATA_WUNLOCK(ifp);
25265a255516SAlexander V. Chernikov 
25275a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25285a255516SAlexander V. Chernikov 		EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED);
25295a255516SAlexander V. Chernikov 	EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
25305a255516SAlexander V. Chernikov 
25315a255516SAlexander V. Chernikov 	LLE_WUNLOCK(ln);
25325a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25335a255516SAlexander V. Chernikov 		llentry_free(ln_tmp);
25345a255516SAlexander V. Chernikov 
25355a255516SAlexander V. Chernikov 	return (0);
2536f6b84910SAlexander V. Chernikov }
2537f6b84910SAlexander V. Chernikov 
2538f6b84910SAlexander V. Chernikov /*
25393e7a2321SAlexander V. Chernikov  * Removes either all lle entries for given @ia, or lle
25403e7a2321SAlexander V. Chernikov  * corresponding to @ia address.
2541f6b84910SAlexander V. Chernikov  */
2542f6b84910SAlexander V. Chernikov void
25433e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all)
2544f6b84910SAlexander V. Chernikov {
2545f6b84910SAlexander V. Chernikov 	struct sockaddr_in6 mask, addr;
25463e7a2321SAlexander V. Chernikov 	struct sockaddr *saddr, *smask;
2547f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
2548f6b84910SAlexander V. Chernikov 
2549f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2550f6b84910SAlexander V. Chernikov 	memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
2551f6b84910SAlexander V. Chernikov 	memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
25523e7a2321SAlexander V. Chernikov 	saddr = (struct sockaddr *)&addr;
25533e7a2321SAlexander V. Chernikov 	smask = (struct sockaddr *)&mask;
25543e7a2321SAlexander V. Chernikov 
25553e7a2321SAlexander V. Chernikov 	if (all != 0)
25563e7a2321SAlexander V. Chernikov 		lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC);
25573e7a2321SAlexander V. Chernikov 	else
25583e7a2321SAlexander V. Chernikov 		lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr);
2559f6b84910SAlexander V. Chernikov }
2560f6b84910SAlexander V. Chernikov 
256131d4137bSSUZUKI Shinsuke static void
25626e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln)
256331d4137bSSUZUKI Shinsuke {
256431d4137bSSUZUKI Shinsuke 	struct mbuf *m_hold, *m_hold_next;
256531d4137bSSUZUKI Shinsuke 
25666e6b3f7cSQing Li 	for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) {
256731d4137bSSUZUKI Shinsuke 		m_hold_next = m_hold->m_nextpkt;
256831d4137bSSUZUKI Shinsuke 		m_freem(m_hold);
256931d4137bSSUZUKI Shinsuke 	}
257031d4137bSSUZUKI Shinsuke 
25716e6b3f7cSQing Li 	ln->la_hold = NULL;
257231d4137bSSUZUKI Shinsuke }
257331d4137bSSUZUKI Shinsuke 
257433841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS);
257533841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS);
257665fdf521SMark Johnston 
257733841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6);
257865fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
257965fdf521SMark Johnston 	CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
258065fdf521SMark Johnston 	NULL, 0, nd6_sysctl_drlist, "S,in6_defrouter",
258165fdf521SMark Johnston 	"NDP default router list");
258265fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
258365fdf521SMark Johnston 	CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
258465fdf521SMark Johnston 	NULL, 0, nd6_sysctl_prlist, "S,in6_prefix",
258565fdf521SMark Johnston 	"NDP prefix list");
25866df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
2587d6e82913SSteven Hartland 	CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
25886df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer,
2589d6e82913SSteven Hartland 	CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), "");
259033841545SHajimu UMEMOTO 
259133841545SHajimu UMEMOTO static int
259233841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS)
259333841545SHajimu UMEMOTO {
25947195094cSMarius Strobl 	struct in6_defrouter d;
259533841545SHajimu UMEMOTO 	struct nd_defrouter *dr;
25967195094cSMarius Strobl 	int error;
259733841545SHajimu UMEMOTO 
25984de485feSMark Johnston 	if (req->newptr != NULL)
25997195094cSMarius Strobl 		return (EPERM);
260033841545SHajimu UMEMOTO 
26014de485feSMark Johnston 	error = sysctl_wire_old_buffer(req, 0);
26024de485feSMark Johnston 	if (error != 0)
26034de485feSMark Johnston 		return (error);
26044de485feSMark Johnston 
26057195094cSMarius Strobl 	bzero(&d, sizeof(d));
26067195094cSMarius Strobl 	d.rtaddr.sin6_family = AF_INET6;
26077195094cSMarius Strobl 	d.rtaddr.sin6_len = sizeof(d.rtaddr);
26087195094cSMarius Strobl 
26094de485feSMark Johnston 	ND6_RLOCK();
26103b0b2840SJohn Baldwin 	TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) {
26117195094cSMarius Strobl 		d.rtaddr.sin6_addr = dr->rtaddr;
26127195094cSMarius Strobl 		error = sa6_recoverscope(&d.rtaddr);
2613edbb8b46SPeter Wemm 		if (error != 0)
26144de485feSMark Johnston 			break;
261501869be5SMark Johnston 		d.flags = dr->raflags;
26167195094cSMarius Strobl 		d.rtlifetime = dr->rtlifetime;
2617ffa0165aSHiroki Sato 		d.expire = dr->expire + (time_second - time_uptime);
26187195094cSMarius Strobl 		d.if_index = dr->ifp->if_index;
26197195094cSMarius Strobl 		error = SYSCTL_OUT(req, &d, sizeof(d));
26207195094cSMarius Strobl 		if (error != 0)
26214de485feSMark Johnston 			break;
262233841545SHajimu UMEMOTO 	}
26234de485feSMark Johnston 	ND6_RUNLOCK();
26244de485feSMark Johnston 	return (error);
26257195094cSMarius Strobl }
262633841545SHajimu UMEMOTO 
262733841545SHajimu UMEMOTO static int
262833841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS)
262933841545SHajimu UMEMOTO {
26307195094cSMarius Strobl 	struct in6_prefix p;
26317195094cSMarius Strobl 	struct sockaddr_in6 s6;
263233841545SHajimu UMEMOTO 	struct nd_prefix *pr;
26337195094cSMarius Strobl 	struct nd_pfxrouter *pfr;
26347195094cSMarius Strobl 	time_t maxexpire;
26357195094cSMarius Strobl 	int error;
26361d54aa3bSBjoern A. Zeeb 	char ip6buf[INET6_ADDRSTRLEN];
263733841545SHajimu UMEMOTO 
263833841545SHajimu UMEMOTO 	if (req->newptr)
26397195094cSMarius Strobl 		return (EPERM);
264033841545SHajimu UMEMOTO 
2641cc51be7bSMark Johnston 	error = sysctl_wire_old_buffer(req, 0);
2642cc51be7bSMark Johnston 	if (error != 0)
2643cc51be7bSMark Johnston 		return (error);
2644cc51be7bSMark Johnston 
26457195094cSMarius Strobl 	bzero(&p, sizeof(p));
26467195094cSMarius Strobl 	p.origin = PR_ORIG_RA;
26477195094cSMarius Strobl 	bzero(&s6, sizeof(s6));
26487195094cSMarius Strobl 	s6.sin6_family = AF_INET6;
26497195094cSMarius Strobl 	s6.sin6_len = sizeof(s6);
26507195094cSMarius Strobl 
2651cc51be7bSMark Johnston 	ND6_RLOCK();
26523b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
26537195094cSMarius Strobl 		p.prefix = pr->ndpr_prefix;
26547195094cSMarius Strobl 		if (sa6_recoverscope(&p.prefix)) {
26557195094cSMarius Strobl 			log(LOG_ERR, "scope error in prefix list (%s)\n",
26567195094cSMarius Strobl 			    ip6_sprintf(ip6buf, &p.prefix.sin6_addr));
2657a1f7e5f8SHajimu UMEMOTO 			/* XXX: press on... */
2658a1f7e5f8SHajimu UMEMOTO 		}
26597195094cSMarius Strobl 		p.raflags = pr->ndpr_raf;
26607195094cSMarius Strobl 		p.prefixlen = pr->ndpr_plen;
26617195094cSMarius Strobl 		p.vltime = pr->ndpr_vltime;
26627195094cSMarius Strobl 		p.pltime = pr->ndpr_pltime;
26637195094cSMarius Strobl 		p.if_index = pr->ndpr_ifp->if_index;
2664743eee66SSUZUKI Shinsuke 		if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
26657195094cSMarius Strobl 			p.expire = 0;
2666743eee66SSUZUKI Shinsuke 		else {
2667743eee66SSUZUKI Shinsuke 			/* XXX: we assume time_t is signed. */
2668743eee66SSUZUKI Shinsuke 			maxexpire = (-1) &
26697195094cSMarius Strobl 			    ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
26707195094cSMarius Strobl 			if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate)
26717195094cSMarius Strobl 				p.expire = pr->ndpr_lastupdate +
2672ffa0165aSHiroki Sato 				    pr->ndpr_vltime +
2673ffa0165aSHiroki Sato 				    (time_second - time_uptime);
26747195094cSMarius Strobl 			else
26757195094cSMarius Strobl 				p.expire = maxexpire;
2676743eee66SSUZUKI Shinsuke 		}
2677*0bbf244eSMark Johnston 		p.refcnt = pr->ndpr_addrcnt;
26787195094cSMarius Strobl 		p.flags = pr->ndpr_stateflags;
26797195094cSMarius Strobl 		p.advrtrs = 0;
26807195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry)
26817195094cSMarius Strobl 			p.advrtrs++;
26827195094cSMarius Strobl 		error = SYSCTL_OUT(req, &p, sizeof(p));
26837195094cSMarius Strobl 		if (error != 0)
2684cc51be7bSMark Johnston 			break;
26857195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
26867195094cSMarius Strobl 			s6.sin6_addr = pfr->router->rtaddr;
26877195094cSMarius Strobl 			if (sa6_recoverscope(&s6))
26887195094cSMarius Strobl 				log(LOG_ERR,
26897195094cSMarius Strobl 				    "scope error in prefix list (%s)\n",
26907195094cSMarius Strobl 				    ip6_sprintf(ip6buf, &pfr->router->rtaddr));
26917195094cSMarius Strobl 			error = SYSCTL_OUT(req, &s6, sizeof(s6));
26927195094cSMarius Strobl 			if (error != 0)
2693cc51be7bSMark Johnston 				break;
2694cc51be7bSMark Johnston 		}
2695cc51be7bSMark Johnston 	}
2696cc51be7bSMark Johnston 	ND6_RUNLOCK();
26977195094cSMarius Strobl 	return (error);
26987195094cSMarius Strobl }
2699