xref: /freebsd/sys/netinet6/nd6.c (revision d6dbfed81e87847a5499e18dda9177460ad0f2bd)
1caf43b02SWarner Losh /*-
251369649SPedro F. Giffuni  * SPDX-License-Identifier: BSD-3-Clause
351369649SPedro F. Giffuni  *
482cd038dSYoshinobu Inoue  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
582cd038dSYoshinobu Inoue  * All rights reserved.
682cd038dSYoshinobu Inoue  *
782cd038dSYoshinobu Inoue  * Redistribution and use in source and binary forms, with or without
882cd038dSYoshinobu Inoue  * modification, are permitted provided that the following conditions
982cd038dSYoshinobu Inoue  * are met:
1082cd038dSYoshinobu Inoue  * 1. Redistributions of source code must retain the above copyright
1182cd038dSYoshinobu Inoue  *    notice, this list of conditions and the following disclaimer.
1282cd038dSYoshinobu Inoue  * 2. Redistributions in binary form must reproduce the above copyright
1382cd038dSYoshinobu Inoue  *    notice, this list of conditions and the following disclaimer in the
1482cd038dSYoshinobu Inoue  *    documentation and/or other materials provided with the distribution.
1582cd038dSYoshinobu Inoue  * 3. Neither the name of the project nor the names of its contributors
1682cd038dSYoshinobu Inoue  *    may be used to endorse or promote products derived from this software
1782cd038dSYoshinobu Inoue  *    without specific prior written permission.
1882cd038dSYoshinobu Inoue  *
1982cd038dSYoshinobu Inoue  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
2082cd038dSYoshinobu Inoue  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2182cd038dSYoshinobu Inoue  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2282cd038dSYoshinobu Inoue  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
2382cd038dSYoshinobu Inoue  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2482cd038dSYoshinobu Inoue  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2582cd038dSYoshinobu Inoue  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2682cd038dSYoshinobu Inoue  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2782cd038dSYoshinobu Inoue  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2882cd038dSYoshinobu Inoue  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2982cd038dSYoshinobu Inoue  * SUCH DAMAGE.
30b48287a3SDavid E. O'Brien  *
31b48287a3SDavid E. O'Brien  *	$KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $
3282cd038dSYoshinobu Inoue  */
3382cd038dSYoshinobu Inoue 
34b48287a3SDavid E. O'Brien #include <sys/cdefs.h>
35b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$");
36b48287a3SDavid E. O'Brien 
37686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h"
38686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h"
39686cdd19SJun-ichiro itojun Hagino 
4082cd038dSYoshinobu Inoue #include <sys/param.h>
4182cd038dSYoshinobu Inoue #include <sys/systm.h>
42e2e050c8SConrad Meyer #include <sys/eventhandler.h>
4333841545SHajimu UMEMOTO #include <sys/callout.h>
44d748f7efSMark Johnston #include <sys/lock.h>
4582cd038dSYoshinobu Inoue #include <sys/malloc.h>
4682cd038dSYoshinobu Inoue #include <sys/mbuf.h>
47d748f7efSMark Johnston #include <sys/mutex.h>
4882cd038dSYoshinobu Inoue #include <sys/socket.h>
4982cd038dSYoshinobu Inoue #include <sys/sockio.h>
5082cd038dSYoshinobu Inoue #include <sys/time.h>
5182cd038dSYoshinobu Inoue #include <sys/kernel.h>
52686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h>
5382cd038dSYoshinobu Inoue #include <sys/errno.h>
5482cd038dSYoshinobu Inoue #include <sys/syslog.h>
556e6b3f7cSQing Li #include <sys/rwlock.h>
5682cd038dSYoshinobu Inoue #include <sys/queue.h>
5757f60867SMark Johnston #include <sys/sdt.h>
5833841545SHajimu UMEMOTO #include <sys/sysctl.h>
5982cd038dSYoshinobu Inoue 
6082cd038dSYoshinobu Inoue #include <net/if.h>
6176039bc8SGleb Smirnoff #include <net/if_var.h>
6282cd038dSYoshinobu Inoue #include <net/if_dl.h>
6382cd038dSYoshinobu Inoue #include <net/if_types.h>
6482cd038dSYoshinobu Inoue #include <net/route.h>
654b79449eSBjoern A. Zeeb #include <net/vnet.h>
6682cd038dSYoshinobu Inoue 
6782cd038dSYoshinobu Inoue #include <netinet/in.h>
6857f60867SMark Johnston #include <netinet/in_kdtrace.h>
696e6b3f7cSQing Li #include <net/if_llatbl.h>
7082cd038dSYoshinobu Inoue #include <netinet/if_ether.h>
7182cd038dSYoshinobu Inoue #include <netinet6/in6_var.h>
72686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h>
7382cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h>
74a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h>
7582cd038dSYoshinobu Inoue #include <netinet6/nd6.h>
76a283298cSHiroki Sato #include <netinet6/in6_ifattach.h>
77686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h>
781db8d1f8SAna Kukec #include <netinet6/send.h>
7982cd038dSYoshinobu Inoue 
80743eee66SSUZUKI Shinsuke #include <sys/limits.h>
81743eee66SSUZUKI Shinsuke 
82aed55708SRobert Watson #include <security/mac/mac_framework.h>
83aed55708SRobert Watson 
8482cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */
8582cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */
8682cd038dSYoshinobu Inoue 
8747e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s))
8882cd038dSYoshinobu Inoue 
895e0a6f31SMark Johnston MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
905e0a6f31SMark Johnston 
9182cea7e6SBjoern A. Zeeb /* timer values */
9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune)	= 1;	/* walk list every 1 seconds */
9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay)	= 5;	/* delay first probe time 5 second */
9482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries)	= 3;	/* maximum unicast query */
9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries)	= 3;	/* maximum multicast query */
9682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1;	/* use loopback interface for
9782cea7e6SBjoern A. Zeeb 					 * local traffic */
9882cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer)	= (60 * 60 * 24); /* 1 day: garbage
9982cea7e6SBjoern A. Zeeb 					 * collection timer */
100686cdd19SJun-ichiro itojun Hagino 
101686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */
1025f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nd6_maxndopt) = 10; /* max # of ND options allowed */
10382cea7e6SBjoern A. Zeeb 
10482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0;	/* max # of subsequent upper
10582cea7e6SBjoern A. Zeeb 					 * layer hints */
1065f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
10782cea7e6SBjoern A. Zeeb 					 * ND entries */
1081e77c105SRobert Watson #define	V_nd6_maxndopt			VNET(nd6_maxndopt)
1091e77c105SRobert Watson #define	V_nd6_maxqueuelen		VNET(nd6_maxqueuelen)
110686cdd19SJun-ichiro itojun Hagino 
11182cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG
11282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1;
11382cea7e6SBjoern A. Zeeb #else
11482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0;
11582cea7e6SBjoern A. Zeeb #endif
11633841545SHajimu UMEMOTO 
11730b45077SBjoern A. Zeeb static eventhandler_tag lle_event_eh, iflladdr_event_eh, ifnet_link_event_eh;
11830aee131SAndrey V. Elsukov 
119eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter);
120eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix);
1214de485feSMark Johnston VNET_DEFINE(struct rwlock, nd6_lock);
122d748f7efSMark Johnston VNET_DEFINE(uint64_t, nd6_list_genid);
123d748f7efSMark Johnston VNET_DEFINE(struct mtx, nd6_onlink_mtx);
12482cd038dSYoshinobu Inoue 
12582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL;
1261e77c105SRobert Watson #define	V_nd6_recalc_reachtm_interval	VNET(nd6_recalc_reachtm_interval)
12744e33a07SMarko Zec 
1281db8d1f8SAna Kukec int	(*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
1291db8d1f8SAna Kukec 
130f0316e1aSAlexander V. Chernikov static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *,
1316f56329aSXin LI 	struct ifnet *);
1329233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *);
1339233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *);
1349233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *);
135435bece4SMark Johnston static void nd6_free(struct llentry **, int);
13617a03656SEric van Gyzen static void nd6_free_redirect(const struct llentry *);
1379233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *);
1389b420b3dSAlexander V. Chernikov static void nd6_llinfo_settimer_locked(struct llentry *, long);
1396e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *);
140f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
1414fb3a820SAlexander V. Chernikov static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *,
1426d768226SGeorge V. Neville-Neil     const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **);
1431fe201c3SAlexander V. Chernikov static int nd6_need_cache(struct ifnet *);
1441fe201c3SAlexander V. Chernikov 
14533841545SHajimu UMEMOTO 
1465f901c92SAndrew Turner VNET_DEFINE_STATIC(struct callout, nd6_slowtimo_ch);
1471e77c105SRobert Watson #define	V_nd6_slowtimo_ch		VNET(nd6_slowtimo_ch)
148eddfbb76SRobert Watson 
149eddfbb76SRobert Watson VNET_DEFINE(struct callout, nd6_timer_ch);
1509901091eSBjoern A. Zeeb #define	V_nd6_timer_ch			VNET(nd6_timer_ch)
151eddfbb76SRobert Watson 
15230aee131SAndrey V. Elsukov static void
15330aee131SAndrey V. Elsukov nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
15430aee131SAndrey V. Elsukov {
15530aee131SAndrey V. Elsukov 	struct rt_addrinfo rtinfo;
156314294deSAlexander V. Chernikov 	struct sockaddr_in6 dst;
15730aee131SAndrey V. Elsukov 	struct sockaddr_dl gw;
15830aee131SAndrey V. Elsukov 	struct ifnet *ifp;
15930aee131SAndrey V. Elsukov 	int type;
160559b4296SAlan Somers 	int fibnum;
16130aee131SAndrey V. Elsukov 
16230aee131SAndrey V. Elsukov 	LLE_WLOCK_ASSERT(lle);
16330aee131SAndrey V. Elsukov 
164314294deSAlexander V. Chernikov 	if (lltable_get_af(lle->lle_tbl) != AF_INET6)
165314294deSAlexander V. Chernikov 		return;
166314294deSAlexander V. Chernikov 
16730aee131SAndrey V. Elsukov 	switch (evt) {
16830aee131SAndrey V. Elsukov 	case LLENTRY_RESOLVED:
16930aee131SAndrey V. Elsukov 		type = RTM_ADD;
17030aee131SAndrey V. Elsukov 		KASSERT(lle->la_flags & LLE_VALID,
17130aee131SAndrey V. Elsukov 		    ("%s: %p resolved but not valid?", __func__, lle));
17230aee131SAndrey V. Elsukov 		break;
17330aee131SAndrey V. Elsukov 	case LLENTRY_EXPIRED:
17430aee131SAndrey V. Elsukov 		type = RTM_DELETE;
17530aee131SAndrey V. Elsukov 		break;
17630aee131SAndrey V. Elsukov 	default:
17730aee131SAndrey V. Elsukov 		return;
17830aee131SAndrey V. Elsukov 	}
17930aee131SAndrey V. Elsukov 
180314294deSAlexander V. Chernikov 	ifp = lltable_get_ifp(lle->lle_tbl);
18130aee131SAndrey V. Elsukov 
18230aee131SAndrey V. Elsukov 	bzero(&dst, sizeof(dst));
18330aee131SAndrey V. Elsukov 	bzero(&gw, sizeof(gw));
18430aee131SAndrey V. Elsukov 	bzero(&rtinfo, sizeof(rtinfo));
185314294deSAlexander V. Chernikov 	lltable_fill_sa_entry(lle, (struct sockaddr *)&dst);
18630aee131SAndrey V. Elsukov 	dst.sin6_scope_id = in6_getscopezone(ifp,
187314294deSAlexander V. Chernikov 	    in6_addrscope(&dst.sin6_addr));
18830aee131SAndrey V. Elsukov 	gw.sdl_len = sizeof(struct sockaddr_dl);
18930aee131SAndrey V. Elsukov 	gw.sdl_family = AF_LINK;
19030aee131SAndrey V. Elsukov 	gw.sdl_alen = ifp->if_addrlen;
19130aee131SAndrey V. Elsukov 	gw.sdl_index = ifp->if_index;
19230aee131SAndrey V. Elsukov 	gw.sdl_type = ifp->if_type;
19330aee131SAndrey V. Elsukov 	if (evt == LLENTRY_RESOLVED)
1944fb3a820SAlexander V. Chernikov 		bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen);
19530aee131SAndrey V. Elsukov 	rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst;
19630aee131SAndrey V. Elsukov 	rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw;
19730aee131SAndrey V. Elsukov 	rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY;
198559b4296SAlan Somers 	fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ifp->if_fib;
19930aee131SAndrey V. Elsukov 	rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | (
200559b4296SAlan Somers 	    type == RTM_ADD ? RTF_UP: 0), 0, fibnum);
20130aee131SAndrey V. Elsukov }
20230aee131SAndrey V. Elsukov 
2034fb3a820SAlexander V. Chernikov /*
2044fb3a820SAlexander V. Chernikov  * A handler for interface link layer address change event.
2054fb3a820SAlexander V. Chernikov  */
2064fb3a820SAlexander V. Chernikov static void
2074fb3a820SAlexander V. Chernikov nd6_iflladdr(void *arg __unused, struct ifnet *ifp)
2084fb3a820SAlexander V. Chernikov {
2094fb3a820SAlexander V. Chernikov 
2104fb3a820SAlexander V. Chernikov 	lltable_update_ifaddr(LLTABLE6(ifp));
2114fb3a820SAlexander V. Chernikov }
2124fb3a820SAlexander V. Chernikov 
21382cd038dSYoshinobu Inoue void
2141272577eSXin LI nd6_init(void)
21582cd038dSYoshinobu Inoue {
21682cd038dSYoshinobu Inoue 
217d748f7efSMark Johnston 	mtx_init(&V_nd6_onlink_mtx, "nd6 onlink", NULL, MTX_DEF);
218d748f7efSMark Johnston 	rw_init(&V_nd6_lock, "nd6 list");
2194de485feSMark Johnston 
22044e33a07SMarko Zec 	LIST_INIT(&V_nd_prefix);
221603724d3SBjoern A. Zeeb 	TAILQ_INIT(&V_nd_defrouter);
22282cea7e6SBjoern A. Zeeb 
2239901091eSBjoern A. Zeeb 	/* Start timers. */
224603724d3SBjoern A. Zeeb 	callout_init(&V_nd6_slowtimo_ch, 0);
225603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
226f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
227d6ad6a86SMark Johnston 
2289901091eSBjoern A. Zeeb 	callout_init(&V_nd6_timer_ch, 0);
2299901091eSBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet);
2309901091eSBjoern A. Zeeb 
231d6ad6a86SMark Johnston 	nd6_dad_init();
2324fb3a820SAlexander V. Chernikov 	if (IS_DEFAULT_VNET(curvnet)) {
23330aee131SAndrey V. Elsukov 		lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
23430aee131SAndrey V. Elsukov 		    NULL, EVENTHANDLER_PRI_ANY);
2354fb3a820SAlexander V. Chernikov 		iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event,
2364fb3a820SAlexander V. Chernikov 		    nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
23730b45077SBjoern A. Zeeb 		ifnet_link_event_eh = EVENTHANDLER_REGISTER(ifnet_link_event,
23830b45077SBjoern A. Zeeb 		    nd6_ifnet_link_event, NULL, EVENTHANDLER_PRI_ANY);
2394fb3a820SAlexander V. Chernikov 	}
24082cd038dSYoshinobu Inoue }
24182cd038dSYoshinobu Inoue 
242bc29160dSMarko Zec #ifdef VIMAGE
243bc29160dSMarko Zec void
244bc29160dSMarko Zec nd6_destroy()
245bc29160dSMarko Zec {
246bc29160dSMarko Zec 
247bc29160dSMarko Zec 	callout_drain(&V_nd6_slowtimo_ch);
248bc29160dSMarko Zec 	callout_drain(&V_nd6_timer_ch);
2494fb3a820SAlexander V. Chernikov 	if (IS_DEFAULT_VNET(curvnet)) {
25030b45077SBjoern A. Zeeb 		EVENTHANDLER_DEREGISTER(ifnet_link_event, ifnet_link_event_eh);
25130aee131SAndrey V. Elsukov 		EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
2524fb3a820SAlexander V. Chernikov 		EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh);
2534fb3a820SAlexander V. Chernikov 	}
2544de485feSMark Johnston 	rw_destroy(&V_nd6_lock);
255d748f7efSMark Johnston 	mtx_destroy(&V_nd6_onlink_mtx);
256bc29160dSMarko Zec }
257bc29160dSMarko Zec #endif
258bc29160dSMarko Zec 
25931b1bfe1SHajimu UMEMOTO struct nd_ifinfo *
2601272577eSXin LI nd6_ifattach(struct ifnet *ifp)
26182cd038dSYoshinobu Inoue {
26231b1bfe1SHajimu UMEMOTO 	struct nd_ifinfo *nd;
26382cd038dSYoshinobu Inoue 
264fc315641SMark Johnston 	nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO);
26531b1bfe1SHajimu UMEMOTO 	nd->initialized = 1;
26682cd038dSYoshinobu Inoue 
26731b1bfe1SHajimu UMEMOTO 	nd->chlim = IPV6_DEFHLIM;
26831b1bfe1SHajimu UMEMOTO 	nd->basereachable = REACHABLE_TIME;
26931b1bfe1SHajimu UMEMOTO 	nd->reachable = ND_COMPUTE_RTIME(nd->basereachable);
27031b1bfe1SHajimu UMEMOTO 	nd->retrans = RETRANS_TIMER;
271a283298cSHiroki Sato 
272a283298cSHiroki Sato 	nd->flags = ND6_IFF_PERFORMNUD;
273a283298cSHiroki Sato 
274af805644SHiroki Sato 	/* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL.
275af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by
276af805644SHiroki Sato 	 * default regardless of the V_ip6_auto_linklocal configuration to
277af805644SHiroki Sato 	 * give a reasonable default behavior.
278af805644SHiroki Sato 	 */
279af805644SHiroki Sato 	if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) ||
280af805644SHiroki Sato 	    (ifp->if_flags & IFF_LOOPBACK))
281a283298cSHiroki Sato 		nd->flags |= ND6_IFF_AUTO_LINKLOCAL;
282af805644SHiroki Sato 	/*
283af805644SHiroki Sato 	 * A loopback interface does not need to accept RTADV.
284af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by
285af805644SHiroki Sato 	 * default regardless of the V_ip6_accept_rtadv configuration to
286af805644SHiroki Sato 	 * prevent the interface from accepting RA messages arrived
287af805644SHiroki Sato 	 * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV.
288af805644SHiroki Sato 	 */
289af805644SHiroki Sato 	if (V_ip6_accept_rtadv &&
290af805644SHiroki Sato 	    !(ifp->if_flags & IFF_LOOPBACK) &&
291af805644SHiroki Sato 	    (ifp->if_type != IFT_BRIDGE))
292a283298cSHiroki Sato 			nd->flags |= ND6_IFF_ACCEPT_RTADV;
293e7fa8d0aSHiroki Sato 	if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK))
294e7fa8d0aSHiroki Sato 		nd->flags |= ND6_IFF_NO_RADR;
29531b1bfe1SHajimu UMEMOTO 
29631b1bfe1SHajimu UMEMOTO 	/* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */
29731b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, nd);
29831b1bfe1SHajimu UMEMOTO 
29931b1bfe1SHajimu UMEMOTO 	return nd;
30031b1bfe1SHajimu UMEMOTO }
30131b1bfe1SHajimu UMEMOTO 
30231b1bfe1SHajimu UMEMOTO void
30389856f7eSBjoern A. Zeeb nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd)
30431b1bfe1SHajimu UMEMOTO {
305a68cc388SGleb Smirnoff 	struct epoch_tracker et;
30689856f7eSBjoern A. Zeeb 	struct ifaddr *ifa, *next;
30789856f7eSBjoern A. Zeeb 
308a68cc388SGleb Smirnoff 	NET_EPOCH_ENTER(et);
309d7c5a620SMatt Macy 	CK_STAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
31089856f7eSBjoern A. Zeeb 		if (ifa->ifa_addr->sa_family != AF_INET6)
31189856f7eSBjoern A. Zeeb 			continue;
31289856f7eSBjoern A. Zeeb 
31389856f7eSBjoern A. Zeeb 		/* stop DAD processing */
31489856f7eSBjoern A. Zeeb 		nd6_dad_stop(ifa);
31589856f7eSBjoern A. Zeeb 	}
316a68cc388SGleb Smirnoff 	NET_EPOCH_EXIT(et);
31731b1bfe1SHajimu UMEMOTO 
31831b1bfe1SHajimu UMEMOTO 	free(nd, M_IP6NDP);
31982cd038dSYoshinobu Inoue }
32082cd038dSYoshinobu Inoue 
32182cd038dSYoshinobu Inoue /*
32282cd038dSYoshinobu Inoue  * Reset ND level link MTU. This function is called when the physical MTU
32382cd038dSYoshinobu Inoue  * changes, which means we might have to adjust the ND level MTU.
32482cd038dSYoshinobu Inoue  */
32582cd038dSYoshinobu Inoue void
3261272577eSXin LI nd6_setmtu(struct ifnet *ifp)
32782cd038dSYoshinobu Inoue {
3287e037c12SKristof Provost 	if (ifp->if_afdata[AF_INET6] == NULL)
3297e037c12SKristof Provost 		return;
33031b1bfe1SHajimu UMEMOTO 
33131b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, ND_IFINFO(ifp));
33231b1bfe1SHajimu UMEMOTO }
33331b1bfe1SHajimu UMEMOTO 
33431b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */
33531b1bfe1SHajimu UMEMOTO void
3361272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi)
33731b1bfe1SHajimu UMEMOTO {
33831b3783cSHajimu UMEMOTO 	u_int32_t omaxmtu;
33931b1bfe1SHajimu UMEMOTO 
34031b3783cSHajimu UMEMOTO 	omaxmtu = ndi->maxmtu;
34182cd038dSYoshinobu Inoue 	ndi->maxmtu = ifp->if_mtu;
34282cd038dSYoshinobu Inoue 
34382cd038dSYoshinobu Inoue 	/*
34431b3783cSHajimu UMEMOTO 	 * Decreasing the interface MTU under IPV6 minimum MTU may cause
34531b3783cSHajimu UMEMOTO 	 * undesirable situation.  We thus notify the operator of the change
34631b3783cSHajimu UMEMOTO 	 * explicitly.  The check for omaxmtu is necessary to restrict the
34731b3783cSHajimu UMEMOTO 	 * log to the case of changing the MTU, not initializing it.
34882cd038dSYoshinobu Inoue 	 */
34931b3783cSHajimu UMEMOTO 	if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) {
35031b3783cSHajimu UMEMOTO 		log(LOG_NOTICE, "nd6_setmtu0: "
35131b3783cSHajimu UMEMOTO 		    "new link MTU on %s (%lu) is too small for IPv6\n",
35231b3783cSHajimu UMEMOTO 		    if_name(ifp), (unsigned long)ndi->maxmtu);
35382cd038dSYoshinobu Inoue 	}
35431b3783cSHajimu UMEMOTO 
355603724d3SBjoern A. Zeeb 	if (ndi->maxmtu > V_in6_maxmtu)
35631b3783cSHajimu UMEMOTO 		in6_setmaxmtu(); /* check all interfaces just in case */
35731b3783cSHajimu UMEMOTO 
35882cd038dSYoshinobu Inoue }
35982cd038dSYoshinobu Inoue 
36082cd038dSYoshinobu Inoue void
3611272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts)
36282cd038dSYoshinobu Inoue {
36307eb2995SHajimu UMEMOTO 
36482cd038dSYoshinobu Inoue 	bzero(ndopts, sizeof(*ndopts));
36582cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)opt;
36682cd038dSYoshinobu Inoue 	ndopts->nd_opts_last
36782cd038dSYoshinobu Inoue 		= (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len);
36882cd038dSYoshinobu Inoue 
36982cd038dSYoshinobu Inoue 	if (icmp6len == 0) {
37082cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
37182cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
37282cd038dSYoshinobu Inoue 	}
37382cd038dSYoshinobu Inoue }
37482cd038dSYoshinobu Inoue 
37582cd038dSYoshinobu Inoue /*
37682cd038dSYoshinobu Inoue  * Take one ND option.
37782cd038dSYoshinobu Inoue  */
37882cd038dSYoshinobu Inoue struct nd_opt_hdr *
3791272577eSXin LI nd6_option(union nd_opts *ndopts)
38082cd038dSYoshinobu Inoue {
38182cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
38282cd038dSYoshinobu Inoue 	int olen;
38382cd038dSYoshinobu Inoue 
38439e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
38539e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
38639e19560SBjoern A. Zeeb 	    __func__));
3872ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
38882cd038dSYoshinobu Inoue 		return NULL;
38982cd038dSYoshinobu Inoue 	if (ndopts->nd_opts_done)
39082cd038dSYoshinobu Inoue 		return NULL;
39182cd038dSYoshinobu Inoue 
39282cd038dSYoshinobu Inoue 	nd_opt = ndopts->nd_opts_search;
39382cd038dSYoshinobu Inoue 
39419391949SKris Kennaway 	/* make sure nd_opt_len is inside the buffer */
39519391949SKris Kennaway 	if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
39619391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
39719391949SKris Kennaway 		return NULL;
39819391949SKris Kennaway 	}
39919391949SKris Kennaway 
40082cd038dSYoshinobu Inoue 	olen = nd_opt->nd_opt_len << 3;
40182cd038dSYoshinobu Inoue 	if (olen == 0) {
40282cd038dSYoshinobu Inoue 		/*
40382cd038dSYoshinobu Inoue 		 * Message validation requires that all included
40482cd038dSYoshinobu Inoue 		 * options have a length that is greater than zero.
40582cd038dSYoshinobu Inoue 		 */
40682cd038dSYoshinobu Inoue 		bzero(ndopts, sizeof(*ndopts));
40782cd038dSYoshinobu Inoue 		return NULL;
40882cd038dSYoshinobu Inoue 	}
40982cd038dSYoshinobu Inoue 
41082cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
41119391949SKris Kennaway 	if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
41219391949SKris Kennaway 		/* option overruns the end of buffer, invalid */
41319391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
41419391949SKris Kennaway 		return NULL;
41519391949SKris Kennaway 	} else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
41619391949SKris Kennaway 		/* reached the end of options chain */
41782cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
41882cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
41982cd038dSYoshinobu Inoue 	}
42082cd038dSYoshinobu Inoue 	return nd_opt;
42182cd038dSYoshinobu Inoue }
42282cd038dSYoshinobu Inoue 
42382cd038dSYoshinobu Inoue /*
42482cd038dSYoshinobu Inoue  * Parse multiple ND options.
42582cd038dSYoshinobu Inoue  * This function is much easier to use, for ND routines that do not need
42682cd038dSYoshinobu Inoue  * multiple options of the same type.
42782cd038dSYoshinobu Inoue  */
42882cd038dSYoshinobu Inoue int
4291272577eSXin LI nd6_options(union nd_opts *ndopts)
43082cd038dSYoshinobu Inoue {
43182cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
43282cd038dSYoshinobu Inoue 	int i = 0;
43382cd038dSYoshinobu Inoue 
43439e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
43539e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
43639e19560SBjoern A. Zeeb 	    __func__));
4372ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
43882cd038dSYoshinobu Inoue 		return 0;
43982cd038dSYoshinobu Inoue 
44082cd038dSYoshinobu Inoue 	while (1) {
44182cd038dSYoshinobu Inoue 		nd_opt = nd6_option(ndopts);
4422ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
44382cd038dSYoshinobu Inoue 			/*
44482cd038dSYoshinobu Inoue 			 * Message validation requires that all included
44582cd038dSYoshinobu Inoue 			 * options have a length that is greater than zero.
44682cd038dSYoshinobu Inoue 			 */
447e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_badopt);
44882cd038dSYoshinobu Inoue 			bzero(ndopts, sizeof(*ndopts));
44982cd038dSYoshinobu Inoue 			return -1;
45082cd038dSYoshinobu Inoue 		}
45182cd038dSYoshinobu Inoue 
4522ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL)
45382cd038dSYoshinobu Inoue 			goto skip1;
45482cd038dSYoshinobu Inoue 
45582cd038dSYoshinobu Inoue 		switch (nd_opt->nd_opt_type) {
45682cd038dSYoshinobu Inoue 		case ND_OPT_SOURCE_LINKADDR:
45782cd038dSYoshinobu Inoue 		case ND_OPT_TARGET_LINKADDR:
45882cd038dSYoshinobu Inoue 		case ND_OPT_MTU:
45982cd038dSYoshinobu Inoue 		case ND_OPT_REDIRECTED_HEADER:
46011d8451dSHiroki Sato 		case ND_OPT_NONCE:
46182cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
46233841545SHajimu UMEMOTO 				nd6log((LOG_INFO,
46333841545SHajimu UMEMOTO 				    "duplicated ND6 option found (type=%d)\n",
46433841545SHajimu UMEMOTO 				    nd_opt->nd_opt_type));
46582cd038dSYoshinobu Inoue 				/* XXX bark? */
46682cd038dSYoshinobu Inoue 			} else {
46782cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
46882cd038dSYoshinobu Inoue 					= nd_opt;
46982cd038dSYoshinobu Inoue 			}
47082cd038dSYoshinobu Inoue 			break;
47182cd038dSYoshinobu Inoue 		case ND_OPT_PREFIX_INFORMATION:
47282cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) {
47382cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
47482cd038dSYoshinobu Inoue 					= nd_opt;
47582cd038dSYoshinobu Inoue 			}
47682cd038dSYoshinobu Inoue 			ndopts->nd_opts_pi_end =
47782cd038dSYoshinobu Inoue 				(struct nd_opt_prefix_info *)nd_opt;
47882cd038dSYoshinobu Inoue 			break;
479abbe8356SBjoern A. Zeeb 		/* What about ND_OPT_ROUTE_INFO? RFC 4191 */
480abbe8356SBjoern A. Zeeb 		case ND_OPT_RDNSS:	/* RFC 6106 */
481abbe8356SBjoern A. Zeeb 		case ND_OPT_DNSSL:	/* RFC 6106 */
482abbe8356SBjoern A. Zeeb 			/*
483abbe8356SBjoern A. Zeeb 			 * Silently ignore options we know and do not care about
484abbe8356SBjoern A. Zeeb 			 * in the kernel.
485abbe8356SBjoern A. Zeeb 			 */
486abbe8356SBjoern A. Zeeb 			break;
48782cd038dSYoshinobu Inoue 		default:
48882cd038dSYoshinobu Inoue 			/*
48982cd038dSYoshinobu Inoue 			 * Unknown options must be silently ignored,
490a4641f4eSPedro F. Giffuni 			 * to accommodate future extension to the protocol.
49182cd038dSYoshinobu Inoue 			 */
49233841545SHajimu UMEMOTO 			nd6log((LOG_DEBUG,
49382cd038dSYoshinobu Inoue 			    "nd6_options: unsupported option %d - "
49433841545SHajimu UMEMOTO 			    "option ignored\n", nd_opt->nd_opt_type));
49582cd038dSYoshinobu Inoue 		}
49682cd038dSYoshinobu Inoue 
49782cd038dSYoshinobu Inoue skip1:
49882cd038dSYoshinobu Inoue 		i++;
499603724d3SBjoern A. Zeeb 		if (i > V_nd6_maxndopt) {
500e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_toomanyopt);
50133841545SHajimu UMEMOTO 			nd6log((LOG_INFO, "too many loop in nd opt\n"));
50282cd038dSYoshinobu Inoue 			break;
50382cd038dSYoshinobu Inoue 		}
50482cd038dSYoshinobu Inoue 
50582cd038dSYoshinobu Inoue 		if (ndopts->nd_opts_done)
50682cd038dSYoshinobu Inoue 			break;
50782cd038dSYoshinobu Inoue 	}
50882cd038dSYoshinobu Inoue 
50982cd038dSYoshinobu Inoue 	return 0;
51082cd038dSYoshinobu Inoue }
51182cd038dSYoshinobu Inoue 
51282cd038dSYoshinobu Inoue /*
513743eee66SSUZUKI Shinsuke  * ND6 timer routine to handle ND6 entries
51482cd038dSYoshinobu Inoue  */
5159b420b3dSAlexander V. Chernikov static void
5166e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick)
517743eee66SSUZUKI Shinsuke {
518ef8d671cSHajimu UMEMOTO 	int canceled;
519ef8d671cSHajimu UMEMOTO 
520e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
521e6950476SBjoern A. Zeeb 
522743eee66SSUZUKI Shinsuke 	if (tick < 0) {
5236e6b3f7cSQing Li 		ln->la_expire = 0;
524743eee66SSUZUKI Shinsuke 		ln->ln_ntick = 0;
5250447c136SAlexander V. Chernikov 		canceled = callout_stop(&ln->lle_timer);
526743eee66SSUZUKI Shinsuke 	} else {
5277d26db17SHiroki Sato 		ln->la_expire = time_uptime + tick / hz;
5286e6b3f7cSQing Li 		LLE_ADDREF(ln);
529743eee66SSUZUKI Shinsuke 		if (tick > INT_MAX) {
530743eee66SSUZUKI Shinsuke 			ln->ln_ntick = tick - INT_MAX;
5310447c136SAlexander V. Chernikov 			canceled = callout_reset(&ln->lle_timer, INT_MAX,
532743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
533743eee66SSUZUKI Shinsuke 		} else {
534743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
5350447c136SAlexander V. Chernikov 			canceled = callout_reset(&ln->lle_timer, tick,
536743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
537743eee66SSUZUKI Shinsuke 		}
538743eee66SSUZUKI Shinsuke 	}
5397c4676ddSRandall Stewart 	if (canceled > 0)
540ef8d671cSHajimu UMEMOTO 		LLE_REMREF(ln);
541743eee66SSUZUKI Shinsuke }
54282cd038dSYoshinobu Inoue 
54326deb882SAlexander V. Chernikov /*
54426deb882SAlexander V. Chernikov  * Gets source address of the first packet in hold queue
54526deb882SAlexander V. Chernikov  * and stores it in @src.
54626deb882SAlexander V. Chernikov  * Returns pointer to @src (if hold queue is not empty) or NULL.
54726deb882SAlexander V. Chernikov  *
548c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
54926deb882SAlexander V. Chernikov  */
550c0b8aeaeSAlexander V. Chernikov static __noinline struct in6_addr *
55126deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src)
55226deb882SAlexander V. Chernikov {
55326deb882SAlexander V. Chernikov 	struct ip6_hdr hdr;
55426deb882SAlexander V. Chernikov 	struct mbuf *m;
55526deb882SAlexander V. Chernikov 
55626deb882SAlexander V. Chernikov 	if (ln->la_hold == NULL)
55726deb882SAlexander V. Chernikov 		return (NULL);
55826deb882SAlexander V. Chernikov 
55926deb882SAlexander V. Chernikov 	/*
56026deb882SAlexander V. Chernikov 	 * assume every packet in la_hold has the same IP header
56126deb882SAlexander V. Chernikov 	 */
56226deb882SAlexander V. Chernikov 	m = ln->la_hold;
56306a60e4bSAlexander V. Chernikov 	if (sizeof(hdr) > m->m_len)
56426deb882SAlexander V. Chernikov 		return (NULL);
56526deb882SAlexander V. Chernikov 
56626deb882SAlexander V. Chernikov 	m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
56726deb882SAlexander V. Chernikov 	*src = hdr.ip6_src;
56826deb882SAlexander V. Chernikov 
56926deb882SAlexander V. Chernikov 	return (src);
57026deb882SAlexander V. Chernikov }
57126deb882SAlexander V. Chernikov 
572aa5f023eSAlexander V. Chernikov /*
57312cb7521SAlexander V. Chernikov  * Checks if we need to switch from STALE state.
57412cb7521SAlexander V. Chernikov  *
57512cb7521SAlexander V. Chernikov  * RFC 4861 requires switching from STALE to DELAY state
57612cb7521SAlexander V. Chernikov  * on first packet matching entry, waiting V_nd6_delay and
57712cb7521SAlexander V. Chernikov  * transition to PROBE state (if upper layer confirmation was
57812cb7521SAlexander V. Chernikov  * not received).
57912cb7521SAlexander V. Chernikov  *
58012cb7521SAlexander V. Chernikov  * This code performs a bit differently:
58112cb7521SAlexander V. Chernikov  * On packet hit we don't change state (but desired state
58212cb7521SAlexander V. Chernikov  * can be guessed by control plane). However, after V_nd6_delay
58312cb7521SAlexander V. Chernikov  * seconds code will transition to PROBE state (so DELAY state
58412cb7521SAlexander V. Chernikov  * is kinda skipped in most situations).
58512cb7521SAlexander V. Chernikov  *
58612cb7521SAlexander V. Chernikov  * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so
58712cb7521SAlexander V. Chernikov  * we perform the following upon entering STALE state:
58812cb7521SAlexander V. Chernikov  *
58912cb7521SAlexander V. Chernikov  * 1) Arm timer to run each V_nd6_delay seconds to make sure that
59012cb7521SAlexander V. Chernikov  * if packet was transmitted at the start of given interval, we
59112cb7521SAlexander V. Chernikov  * would be able to switch to PROBE state in V_nd6_delay seconds
59212cb7521SAlexander V. Chernikov  * as user expects.
59312cb7521SAlexander V. Chernikov  *
59412cb7521SAlexander V. Chernikov  * 2) Reschedule timer until original V_nd6_gctimer expires keeping
59512cb7521SAlexander V. Chernikov  * lle in STALE state (remaining timer value stored in lle_remtime).
59612cb7521SAlexander V. Chernikov  *
59712cb7521SAlexander V. Chernikov  * 3) Reschedule timer if packet was transmitted less that V_nd6_delay
59812cb7521SAlexander V. Chernikov  * seconds ago.
59912cb7521SAlexander V. Chernikov  *
60012cb7521SAlexander V. Chernikov  * Returns non-zero value if the entry is still STALE (storing
60112cb7521SAlexander V. Chernikov  * the next timer interval in @pdelay).
60212cb7521SAlexander V. Chernikov  *
60312cb7521SAlexander V. Chernikov  * Returns zero value if original timer expired or we need to switch to
60412cb7521SAlexander V. Chernikov  * PROBE (store that in @do_switch variable).
60512cb7521SAlexander V. Chernikov  */
60612cb7521SAlexander V. Chernikov static int
60712cb7521SAlexander V. Chernikov nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch)
60812cb7521SAlexander V. Chernikov {
60912cb7521SAlexander V. Chernikov 	int nd_delay, nd_gctimer, r_skip_req;
61012cb7521SAlexander V. Chernikov 	time_t lle_hittime;
61112cb7521SAlexander V. Chernikov 	long delay;
61212cb7521SAlexander V. Chernikov 
61312cb7521SAlexander V. Chernikov 	*do_switch = 0;
61412cb7521SAlexander V. Chernikov 	nd_gctimer = V_nd6_gctimer;
61512cb7521SAlexander V. Chernikov 	nd_delay = V_nd6_delay;
61612cb7521SAlexander V. Chernikov 
61712cb7521SAlexander V. Chernikov 	LLE_REQ_LOCK(lle);
61812cb7521SAlexander V. Chernikov 	r_skip_req = lle->r_skip_req;
61912cb7521SAlexander V. Chernikov 	lle_hittime = lle->lle_hittime;
62012cb7521SAlexander V. Chernikov 	LLE_REQ_UNLOCK(lle);
62112cb7521SAlexander V. Chernikov 
62212cb7521SAlexander V. Chernikov 	if (r_skip_req > 0) {
62312cb7521SAlexander V. Chernikov 
62412cb7521SAlexander V. Chernikov 		/*
62512cb7521SAlexander V. Chernikov 		 * Nonzero r_skip_req value was set upon entering
62612cb7521SAlexander V. Chernikov 		 * STALE state. Since value was not changed, no
62712cb7521SAlexander V. Chernikov 		 * packets were passed using this lle. Ask for
62812cb7521SAlexander V. Chernikov 		 * timer reschedule and keep STALE state.
62912cb7521SAlexander V. Chernikov 		 */
63012cb7521SAlexander V. Chernikov 		delay = (long)(MIN(nd_gctimer, nd_delay));
63112cb7521SAlexander V. Chernikov 		delay *= hz;
63212cb7521SAlexander V. Chernikov 		if (lle->lle_remtime > delay)
63312cb7521SAlexander V. Chernikov 			lle->lle_remtime -= delay;
63412cb7521SAlexander V. Chernikov 		else {
63512cb7521SAlexander V. Chernikov 			delay = lle->lle_remtime;
63612cb7521SAlexander V. Chernikov 			lle->lle_remtime = 0;
63712cb7521SAlexander V. Chernikov 		}
63812cb7521SAlexander V. Chernikov 
63912cb7521SAlexander V. Chernikov 		if (delay == 0) {
64012cb7521SAlexander V. Chernikov 
64112cb7521SAlexander V. Chernikov 			/*
64212cb7521SAlexander V. Chernikov 			 * The original ng6_gctime timeout ended,
64312cb7521SAlexander V. Chernikov 			 * no more rescheduling.
64412cb7521SAlexander V. Chernikov 			 */
64512cb7521SAlexander V. Chernikov 			return (0);
64612cb7521SAlexander V. Chernikov 		}
64712cb7521SAlexander V. Chernikov 
64812cb7521SAlexander V. Chernikov 		*pdelay = delay;
64912cb7521SAlexander V. Chernikov 		return (1);
65012cb7521SAlexander V. Chernikov 	}
65112cb7521SAlexander V. Chernikov 
65212cb7521SAlexander V. Chernikov 	/*
65312cb7521SAlexander V. Chernikov 	 * Packet received. Verify timestamp
65412cb7521SAlexander V. Chernikov 	 */
65512cb7521SAlexander V. Chernikov 	delay = (long)(time_uptime - lle_hittime);
65612cb7521SAlexander V. Chernikov 	if (delay < nd_delay) {
65712cb7521SAlexander V. Chernikov 
65812cb7521SAlexander V. Chernikov 		/*
65912cb7521SAlexander V. Chernikov 		 * V_nd6_delay still not passed since the first
66012cb7521SAlexander V. Chernikov 		 * hit in STALE state.
66112cb7521SAlexander V. Chernikov 		 * Reshedule timer and return.
66212cb7521SAlexander V. Chernikov 		 */
66312cb7521SAlexander V. Chernikov 		*pdelay = (long)(nd_delay - delay) * hz;
66412cb7521SAlexander V. Chernikov 		return (1);
66512cb7521SAlexander V. Chernikov 	}
66612cb7521SAlexander V. Chernikov 
66712cb7521SAlexander V. Chernikov 	/* Request switching to probe */
66812cb7521SAlexander V. Chernikov 	*do_switch = 1;
66912cb7521SAlexander V. Chernikov 	return (0);
67012cb7521SAlexander V. Chernikov }
67112cb7521SAlexander V. Chernikov 
67212cb7521SAlexander V. Chernikov 
67312cb7521SAlexander V. Chernikov /*
674aa5f023eSAlexander V. Chernikov  * Switch @lle state to new state optionally arming timers.
675c0b8aeaeSAlexander V. Chernikov  *
676c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
677aa5f023eSAlexander V. Chernikov  */
678c0b8aeaeSAlexander V. Chernikov __noinline void
679aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(struct llentry *lle, int newstate)
680aa5f023eSAlexander V. Chernikov {
681aa5f023eSAlexander V. Chernikov 	struct ifnet *ifp;
68212cb7521SAlexander V. Chernikov 	int nd_gctimer, nd_delay;
68312cb7521SAlexander V. Chernikov 	long delay, remtime;
684aa5f023eSAlexander V. Chernikov 
685aa5f023eSAlexander V. Chernikov 	delay = 0;
68612cb7521SAlexander V. Chernikov 	remtime = 0;
687aa5f023eSAlexander V. Chernikov 
688aa5f023eSAlexander V. Chernikov 	switch (newstate) {
689aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_INCOMPLETE:
690aa5f023eSAlexander V. Chernikov 		ifp = lle->lle_tbl->llt_ifp;
691aa5f023eSAlexander V. Chernikov 		delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000;
692aa5f023eSAlexander V. Chernikov 		break;
693aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_REACHABLE:
694aa5f023eSAlexander V. Chernikov 		if (!ND6_LLINFO_PERMANENT(lle)) {
695aa5f023eSAlexander V. Chernikov 			ifp = lle->lle_tbl->llt_ifp;
696aa5f023eSAlexander V. Chernikov 			delay = (long)ND_IFINFO(ifp)->reachable * hz;
697aa5f023eSAlexander V. Chernikov 		}
698aa5f023eSAlexander V. Chernikov 		break;
699aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_STALE:
70012cb7521SAlexander V. Chernikov 
70112cb7521SAlexander V. Chernikov 		/*
70212cb7521SAlexander V. Chernikov 		 * Notify fast path that we want to know if any packet
70312cb7521SAlexander V. Chernikov 		 * is transmitted by setting r_skip_req.
70412cb7521SAlexander V. Chernikov 		 */
70512cb7521SAlexander V. Chernikov 		LLE_REQ_LOCK(lle);
70612cb7521SAlexander V. Chernikov 		lle->r_skip_req = 1;
70712cb7521SAlexander V. Chernikov 		LLE_REQ_UNLOCK(lle);
70812cb7521SAlexander V. Chernikov 		nd_delay = V_nd6_delay;
70912cb7521SAlexander V. Chernikov 		nd_gctimer = V_nd6_gctimer;
71012cb7521SAlexander V. Chernikov 
71112cb7521SAlexander V. Chernikov 		delay = (long)(MIN(nd_gctimer, nd_delay)) * hz;
71212cb7521SAlexander V. Chernikov 		remtime = (long)nd_gctimer * hz - delay;
713aa5f023eSAlexander V. Chernikov 		break;
714aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_DELAY:
715aa5f023eSAlexander V. Chernikov 		lle->la_asked = 0;
716aa5f023eSAlexander V. Chernikov 		delay = (long)V_nd6_delay * hz;
717aa5f023eSAlexander V. Chernikov 		break;
718aa5f023eSAlexander V. Chernikov 	}
719aa5f023eSAlexander V. Chernikov 
720aa5f023eSAlexander V. Chernikov 	if (delay > 0)
721aa5f023eSAlexander V. Chernikov 		nd6_llinfo_settimer_locked(lle, delay);
722aa5f023eSAlexander V. Chernikov 
72312cb7521SAlexander V. Chernikov 	lle->lle_remtime = remtime;
724aa5f023eSAlexander V. Chernikov 	lle->ln_state = newstate;
725aa5f023eSAlexander V. Chernikov }
726aa5f023eSAlexander V. Chernikov 
727c0b8aeaeSAlexander V. Chernikov /*
728c0b8aeaeSAlexander V. Chernikov  * Timer-dependent part of nd state machine.
729c0b8aeaeSAlexander V. Chernikov  *
730c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
731c0b8aeaeSAlexander V. Chernikov  */
732c0b8aeaeSAlexander V. Chernikov static __noinline void
7331272577eSXin LI nd6_llinfo_timer(void *arg)
734743eee66SSUZUKI Shinsuke {
735b8a6e03fSGleb Smirnoff 	struct epoch_tracker et;
7366e6b3f7cSQing Li 	struct llentry *ln;
73726deb882SAlexander V. Chernikov 	struct in6_addr *dst, *pdst, *psrc, src;
738743eee66SSUZUKI Shinsuke 	struct ifnet *ifp;
739435bece4SMark Johnston 	struct nd_ifinfo *ndi;
74012cb7521SAlexander V. Chernikov 	int do_switch, send_ns;
74112cb7521SAlexander V. Chernikov 	long delay;
74282cd038dSYoshinobu Inoue 
74319291ab3SBjoern A. Zeeb 	KASSERT(arg != NULL, ("%s: arg NULL", __func__));
7446e6b3f7cSQing Li 	ln = (struct llentry *)arg;
745435bece4SMark Johnston 	ifp = lltable_get_ifp(ln->lle_tbl);
746435bece4SMark Johnston 	CURVNET_SET(ifp->if_vnet);
747435bece4SMark Johnston 
748435bece4SMark Johnston 	ND6_RLOCK();
7492575fbb8SRandall Stewart 	LLE_WLOCK(ln);
7500447c136SAlexander V. Chernikov 	if (callout_pending(&ln->lle_timer)) {
7512575fbb8SRandall Stewart 		/*
7522575fbb8SRandall Stewart 		 * Here we are a bit odd here in the treatment of
7532575fbb8SRandall Stewart 		 * active/pending. If the pending bit is set, it got
7542575fbb8SRandall Stewart 		 * rescheduled before I ran. The active
7552575fbb8SRandall Stewart 		 * bit we ignore, since if it was stopped
7562575fbb8SRandall Stewart 		 * in ll_tablefree() and was currently running
7572575fbb8SRandall Stewart 		 * it would have return 0 so the code would
7582575fbb8SRandall Stewart 		 * not have deleted it since the callout could
7592575fbb8SRandall Stewart 		 * not be stopped so we want to go through
7602575fbb8SRandall Stewart 		 * with the delete here now. If the callout
7612575fbb8SRandall Stewart 		 * was restarted, the pending bit will be back on and
7622575fbb8SRandall Stewart 		 * we just want to bail since the callout_reset would
7632575fbb8SRandall Stewart 		 * return 1 and our reference would have been removed
7642575fbb8SRandall Stewart 		 * by nd6_llinfo_settimer_locked above since canceled
7652575fbb8SRandall Stewart 		 * would have been 1.
7662575fbb8SRandall Stewart 		 */
7672575fbb8SRandall Stewart 		LLE_WUNLOCK(ln);
768435bece4SMark Johnston 		ND6_RUNLOCK();
769435bece4SMark Johnston 		CURVNET_RESTORE();
7702575fbb8SRandall Stewart 		return;
7712575fbb8SRandall Stewart 	}
772b8a6e03fSGleb Smirnoff 	NET_EPOCH_ENTER(et);
77326deb882SAlexander V. Chernikov 	ndi = ND_IFINFO(ifp);
77426deb882SAlexander V. Chernikov 	send_ns = 0;
77526deb882SAlexander V. Chernikov 	dst = &ln->r_l3addr.addr6;
77626deb882SAlexander V. Chernikov 	pdst = dst;
77782cd038dSYoshinobu Inoue 
778743eee66SSUZUKI Shinsuke 	if (ln->ln_ntick > 0) {
779743eee66SSUZUKI Shinsuke 		if (ln->ln_ntick > INT_MAX) {
780743eee66SSUZUKI Shinsuke 			ln->ln_ntick -= INT_MAX;
781e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, INT_MAX);
782743eee66SSUZUKI Shinsuke 		} else {
783743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
784e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, ln->ln_ntick);
78582cd038dSYoshinobu Inoue 		}
7866e6b3f7cSQing Li 		goto done;
787743eee66SSUZUKI Shinsuke 	}
788743eee66SSUZUKI Shinsuke 
789287e3cb4SHajimu UMEMOTO 	if (ln->la_flags & LLE_STATIC) {
7906e6b3f7cSQing Li 		goto done;
7916e6b3f7cSQing Li 	}
79282cd038dSYoshinobu Inoue 
7936e6b3f7cSQing Li 	if (ln->la_flags & LLE_DELETED) {
794435bece4SMark Johnston 		nd6_free(&ln, 0);
7956e6b3f7cSQing Li 		goto done;
7966e6b3f7cSQing Li 	}
79782cd038dSYoshinobu Inoue 
79882cd038dSYoshinobu Inoue 	switch (ln->ln_state) {
79982cd038dSYoshinobu Inoue 	case ND6_LLINFO_INCOMPLETE:
8006e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_mmaxtries) {
8016e6b3f7cSQing Li 			ln->la_asked++;
80226deb882SAlexander V. Chernikov 			send_ns = 1;
80326deb882SAlexander V. Chernikov 			/* Send NS to multicast address */
80426deb882SAlexander V. Chernikov 			pdst = NULL;
80582cd038dSYoshinobu Inoue 		} else {
8066e6b3f7cSQing Li 			struct mbuf *m = ln->la_hold;
80782cd038dSYoshinobu Inoue 			if (m) {
80831d4137bSSUZUKI Shinsuke 				struct mbuf *m0;
80931d4137bSSUZUKI Shinsuke 
81082cd038dSYoshinobu Inoue 				/*
8116e6b3f7cSQing Li 				 * assuming every packet in la_hold has the
812e6950476SBjoern A. Zeeb 				 * same IP header.  Send error after unlock.
81382cd038dSYoshinobu Inoue 				 */
81431d4137bSSUZUKI Shinsuke 				m0 = m->m_nextpkt;
81531d4137bSSUZUKI Shinsuke 				m->m_nextpkt = NULL;
8166e6b3f7cSQing Li 				ln->la_hold = m0;
81731d4137bSSUZUKI Shinsuke 				clear_llinfo_pqueue(ln);
81882cd038dSYoshinobu Inoue 			}
819435bece4SMark Johnston 			nd6_free(&ln, 0);
820e6950476SBjoern A. Zeeb 			if (m != NULL)
821e6950476SBjoern A. Zeeb 				icmp6_error2(m, ICMP6_DST_UNREACH,
822e6950476SBjoern A. Zeeb 				    ICMP6_DST_UNREACH_ADDR, 0, ifp);
82382cd038dSYoshinobu Inoue 		}
82482cd038dSYoshinobu Inoue 		break;
82582cd038dSYoshinobu Inoue 	case ND6_LLINFO_REACHABLE:
826aa5f023eSAlexander V. Chernikov 		if (!ND6_LLINFO_PERMANENT(ln))
827aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
82882cd038dSYoshinobu Inoue 		break;
82933841545SHajimu UMEMOTO 
83033841545SHajimu UMEMOTO 	case ND6_LLINFO_STALE:
83112cb7521SAlexander V. Chernikov 		if (nd6_is_stale(ln, &delay, &do_switch) != 0) {
83212cb7521SAlexander V. Chernikov 
83312cb7521SAlexander V. Chernikov 			/*
83412cb7521SAlexander V. Chernikov 			 * No packet has used this entry and GC timeout
83512cb7521SAlexander V. Chernikov 			 * has not been passed. Reshedule timer and
83612cb7521SAlexander V. Chernikov 			 * return.
83712cb7521SAlexander V. Chernikov 			 */
83812cb7521SAlexander V. Chernikov 			nd6_llinfo_settimer_locked(ln, delay);
83912cb7521SAlexander V. Chernikov 			break;
84012cb7521SAlexander V. Chernikov 		}
84112cb7521SAlexander V. Chernikov 
84212cb7521SAlexander V. Chernikov 		if (do_switch == 0) {
84312cb7521SAlexander V. Chernikov 
84412cb7521SAlexander V. Chernikov 			/*
84512cb7521SAlexander V. Chernikov 			 * GC timer has ended and entry hasn't been used.
84612cb7521SAlexander V. Chernikov 			 * Run Garbage collector (RFC 4861, 5.3)
84712cb7521SAlexander V. Chernikov 			 */
848435bece4SMark Johnston 			if (!ND6_LLINFO_PERMANENT(ln))
849435bece4SMark Johnston 				nd6_free(&ln, 1);
85033841545SHajimu UMEMOTO 			break;
85112cb7521SAlexander V. Chernikov 		}
85212cb7521SAlexander V. Chernikov 
85312cb7521SAlexander V. Chernikov 		/* Entry has been used AND delay timer has ended. */
85412cb7521SAlexander V. Chernikov 
85512cb7521SAlexander V. Chernikov 		/* FALLTHROUGH */
85633841545SHajimu UMEMOTO 
85782cd038dSYoshinobu Inoue 	case ND6_LLINFO_DELAY:
858686cdd19SJun-ichiro itojun Hagino 		if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
859686cdd19SJun-ichiro itojun Hagino 			/* We need NUD */
8606e6b3f7cSQing Li 			ln->la_asked = 1;
861aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE);
86226deb882SAlexander V. Chernikov 			send_ns = 1;
863aa5f023eSAlexander V. Chernikov 		} else
864aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */
86582cd038dSYoshinobu Inoue 		break;
86682cd038dSYoshinobu Inoue 	case ND6_LLINFO_PROBE:
8676e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_umaxtries) {
8686e6b3f7cSQing Li 			ln->la_asked++;
86926deb882SAlexander V. Chernikov 			send_ns = 1;
87082cd038dSYoshinobu Inoue 		} else {
871435bece4SMark Johnston 			nd6_free(&ln, 0);
87282cd038dSYoshinobu Inoue 		}
87382cd038dSYoshinobu Inoue 		break;
874e6950476SBjoern A. Zeeb 	default:
875e6950476SBjoern A. Zeeb 		panic("%s: paths in a dark night can be confusing: %d",
876e6950476SBjoern A. Zeeb 		    __func__, ln->ln_state);
87782cd038dSYoshinobu Inoue 	}
8786e6b3f7cSQing Li done:
879435bece4SMark Johnston 	if (ln != NULL)
880435bece4SMark Johnston 		ND6_RUNLOCK();
88126deb882SAlexander V. Chernikov 	if (send_ns != 0) {
88226deb882SAlexander V. Chernikov 		nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
88326deb882SAlexander V. Chernikov 		psrc = nd6_llinfo_get_holdsrc(ln, &src);
88426deb882SAlexander V. Chernikov 		LLE_FREE_LOCKED(ln);
88526deb882SAlexander V. Chernikov 		ln = NULL;
88626deb882SAlexander V. Chernikov 		nd6_ns_output(ifp, psrc, pdst, dst, NULL);
88726deb882SAlexander V. Chernikov 	}
88826deb882SAlexander V. Chernikov 
8896e6b3f7cSQing Li 	if (ln != NULL)
890e6950476SBjoern A. Zeeb 		LLE_FREE_LOCKED(ln);
891b8a6e03fSGleb Smirnoff 	NET_EPOCH_EXIT(et);
892f0c0b143SHajimu UMEMOTO 	CURVNET_RESTORE();
89382cd038dSYoshinobu Inoue }
89482cd038dSYoshinobu Inoue 
895743eee66SSUZUKI Shinsuke 
896743eee66SSUZUKI Shinsuke /*
897743eee66SSUZUKI Shinsuke  * ND6 timer routine to expire default route list and prefix list
898743eee66SSUZUKI Shinsuke  */
899743eee66SSUZUKI Shinsuke void
9008b615593SMarko Zec nd6_timer(void *arg)
901743eee66SSUZUKI Shinsuke {
90221ca7b57SMarko Zec 	CURVNET_SET((struct vnet *) arg);
903b8a6e03fSGleb Smirnoff 	struct epoch_tracker et;
9044de485feSMark Johnston 	struct nd_drhead drq;
905d748f7efSMark Johnston 	struct nd_prhead prl;
9063b0b2840SJohn Baldwin 	struct nd_defrouter *dr, *ndr;
9073b0b2840SJohn Baldwin 	struct nd_prefix *pr, *npr;
908ca1163bdSMark Johnston 	struct ifnet *ifp;
909743eee66SSUZUKI Shinsuke 	struct in6_ifaddr *ia6, *nia6;
9108cd3b204SMark Johnston 	uint64_t genid;
911743eee66SSUZUKI Shinsuke 
9124de485feSMark Johnston 	TAILQ_INIT(&drq);
913d748f7efSMark Johnston 	LIST_INIT(&prl);
9144de485feSMark Johnston 
9154de485feSMark Johnston 	ND6_WLOCK();
9164de485feSMark Johnston 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr)
9177d26db17SHiroki Sato 		if (dr->expire && dr->expire < time_uptime)
9184de485feSMark Johnston 			defrouter_unlink(dr, &drq);
9194de485feSMark Johnston 	ND6_WUNLOCK();
9204de485feSMark Johnston 
921*d6dbfed8SGleb Smirnoff 	NET_EPOCH_ENTER(et);
9224de485feSMark Johnston 	while ((dr = TAILQ_FIRST(&drq)) != NULL) {
9234de485feSMark Johnston 		TAILQ_REMOVE(&drq, dr, dr_entry);
9244de485feSMark Johnston 		defrouter_del(dr);
925686cdd19SJun-ichiro itojun Hagino 	}
92682cd038dSYoshinobu Inoue 
92733841545SHajimu UMEMOTO 	/*
92833841545SHajimu UMEMOTO 	 * expire interface addresses.
92933841545SHajimu UMEMOTO 	 * in the past the loop was inside prefix expiry processing.
93033841545SHajimu UMEMOTO 	 * However, from a stricter speci-confrmance standpoint, we should
93133841545SHajimu UMEMOTO 	 * rather separate address lifetimes and prefix lifetimes.
932d1da0a06SRobert Watson 	 *
933d1da0a06SRobert Watson 	 * XXXRW: in6_ifaddrhead locking.
93433841545SHajimu UMEMOTO 	 */
93533841545SHajimu UMEMOTO   addrloop:
936d7c5a620SMatt Macy 	CK_STAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) {
93782cd038dSYoshinobu Inoue 		/* check address lifetime */
93833841545SHajimu UMEMOTO 		if (IFA6_IS_INVALID(ia6)) {
93933841545SHajimu UMEMOTO 			int regen = 0;
94033841545SHajimu UMEMOTO 
94133841545SHajimu UMEMOTO 			/*
94233841545SHajimu UMEMOTO 			 * If the expiring address is temporary, try
94333841545SHajimu UMEMOTO 			 * regenerating a new one.  This would be useful when
94488ff5695SSUZUKI Shinsuke 			 * we suspended a laptop PC, then turned it on after a
94533841545SHajimu UMEMOTO 			 * period that could invalidate all temporary
94633841545SHajimu UMEMOTO 			 * addresses.  Although we may have to restart the
94733841545SHajimu UMEMOTO 			 * loop (see below), it must be after purging the
94833841545SHajimu UMEMOTO 			 * address.  Otherwise, we'd see an infinite loop of
94933841545SHajimu UMEMOTO 			 * regeneration.
95033841545SHajimu UMEMOTO 			 */
951603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
95233841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
95333841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0)
95433841545SHajimu UMEMOTO 					regen = 1;
95533841545SHajimu UMEMOTO 			}
95633841545SHajimu UMEMOTO 
95733841545SHajimu UMEMOTO 			in6_purgeaddr(&ia6->ia_ifa);
95833841545SHajimu UMEMOTO 
95933841545SHajimu UMEMOTO 			if (regen)
96033841545SHajimu UMEMOTO 				goto addrloop; /* XXX: see below */
96143068328SHajimu UMEMOTO 		} else if (IFA6_IS_DEPRECATED(ia6)) {
96233841545SHajimu UMEMOTO 			int oldflags = ia6->ia6_flags;
96333841545SHajimu UMEMOTO 
96482cd038dSYoshinobu Inoue 			ia6->ia6_flags |= IN6_IFF_DEPRECATED;
96533841545SHajimu UMEMOTO 
96633841545SHajimu UMEMOTO 			/*
96733841545SHajimu UMEMOTO 			 * If a temporary address has just become deprecated,
96833841545SHajimu UMEMOTO 			 * regenerate a new one if possible.
96933841545SHajimu UMEMOTO 			 */
970603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
97133841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
97233841545SHajimu UMEMOTO 			    (oldflags & IN6_IFF_DEPRECATED) == 0) {
97333841545SHajimu UMEMOTO 
97433841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0) {
97533841545SHajimu UMEMOTO 					/*
97633841545SHajimu UMEMOTO 					 * A new temporary address is
97733841545SHajimu UMEMOTO 					 * generated.
97833841545SHajimu UMEMOTO 					 * XXX: this means the address chain
97933841545SHajimu UMEMOTO 					 * has changed while we are still in
98033841545SHajimu UMEMOTO 					 * the loop.  Although the change
98133841545SHajimu UMEMOTO 					 * would not cause disaster (because
98288ff5695SSUZUKI Shinsuke 					 * it's not a deletion, but an
98388ff5695SSUZUKI Shinsuke 					 * addition,) we'd rather restart the
98433841545SHajimu UMEMOTO 					 * loop just for safety.  Or does this
98533841545SHajimu UMEMOTO 					 * significantly reduce performance??
98633841545SHajimu UMEMOTO 					 */
98733841545SHajimu UMEMOTO 					goto addrloop;
98833841545SHajimu UMEMOTO 				}
98933841545SHajimu UMEMOTO 			}
9906401c828SHiroki Sato 		} else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) {
9916401c828SHiroki Sato 			/*
9926401c828SHiroki Sato 			 * Schedule DAD for a tentative address.  This happens
9936401c828SHiroki Sato 			 * if the interface was down or not running
9946401c828SHiroki Sato 			 * when the address was configured.
9956401c828SHiroki Sato 			 */
9966401c828SHiroki Sato 			int delay;
9976401c828SHiroki Sato 
9986401c828SHiroki Sato 			delay = arc4random() %
9996401c828SHiroki Sato 			    (MAX_RTR_SOLICITATION_DELAY * hz);
10006401c828SHiroki Sato 			nd6_dad_start((struct ifaddr *)ia6, delay);
100183649f07SHajimu UMEMOTO 		} else {
100233841545SHajimu UMEMOTO 			/*
10036401c828SHiroki Sato 			 * Check status of the interface.  If it is down,
10046401c828SHiroki Sato 			 * mark the address as tentative for future DAD.
10056401c828SHiroki Sato 			 */
1006ca1163bdSMark Johnston 			ifp = ia6->ia_ifp;
1007ca1163bdSMark Johnston 			if ((ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0 &&
1008ca1163bdSMark Johnston 			    ((ifp->if_flags & IFF_UP) == 0 ||
1009ca1163bdSMark Johnston 			    (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1010ca1163bdSMark Johnston 			    (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) != 0)){
10116401c828SHiroki Sato 				ia6->ia6_flags &= ~IN6_IFF_DUPLICATED;
10126401c828SHiroki Sato 				ia6->ia6_flags |= IN6_IFF_TENTATIVE;
10136401c828SHiroki Sato 			}
1014ca1163bdSMark Johnston 
10156401c828SHiroki Sato 			/*
101633841545SHajimu UMEMOTO 			 * A new RA might have made a deprecated address
101733841545SHajimu UMEMOTO 			 * preferred.
101833841545SHajimu UMEMOTO 			 */
101933841545SHajimu UMEMOTO 			ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
102082cd038dSYoshinobu Inoue 		}
102182cd038dSYoshinobu Inoue 	}
1022b8a6e03fSGleb Smirnoff 	NET_EPOCH_EXIT(et);
102382cd038dSYoshinobu Inoue 
1024d748f7efSMark Johnston 	ND6_WLOCK();
1025d748f7efSMark Johnston restart:
10263b0b2840SJohn Baldwin 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
102782cd038dSYoshinobu Inoue 		/*
1028d748f7efSMark Johnston 		 * Expire prefixes. Since the pltime is only used for
1029d748f7efSMark Johnston 		 * autoconfigured addresses, pltime processing for prefixes is
1030d748f7efSMark Johnston 		 * not necessary.
1031d748f7efSMark Johnston 		 *
1032d748f7efSMark Johnston 		 * Only unlink after all derived addresses have expired. This
1033d748f7efSMark Johnston 		 * may not occur until two hours after the prefix has expired
1034d748f7efSMark Johnston 		 * per RFC 4862. If the prefix expires before its derived
1035d748f7efSMark Johnston 		 * addresses, mark it off-link. This will be done automatically
1036d748f7efSMark Johnston 		 * after unlinking if no address references remain.
103782cd038dSYoshinobu Inoue 		 */
1038d748f7efSMark Johnston 		if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME ||
1039d748f7efSMark Johnston 		    time_uptime - pr->ndpr_lastupdate <= pr->ndpr_vltime)
1040d748f7efSMark Johnston 			continue;
104182cd038dSYoshinobu Inoue 
1042d748f7efSMark Johnston 		if (pr->ndpr_addrcnt == 0) {
1043d748f7efSMark Johnston 			nd6_prefix_unlink(pr, &prl);
1044d748f7efSMark Johnston 			continue;
10453b0b2840SJohn Baldwin 		}
1046d748f7efSMark Johnston 		if ((pr->ndpr_stateflags & NDPRF_ONLINK) != 0) {
10478cd3b204SMark Johnston 			genid = V_nd6_list_genid;
10488cd3b204SMark Johnston 			nd6_prefix_ref(pr);
1049d748f7efSMark Johnston 			ND6_WUNLOCK();
1050d748f7efSMark Johnston 			ND6_ONLINK_LOCK();
10518cd3b204SMark Johnston 			(void)nd6_prefix_offlink(pr);
10528cd3b204SMark Johnston 			ND6_ONLINK_UNLOCK();
1053d748f7efSMark Johnston 			ND6_WLOCK();
10548cd3b204SMark Johnston 			nd6_prefix_rele(pr);
10558cd3b204SMark Johnston 			if (genid != V_nd6_list_genid)
1056d748f7efSMark Johnston 				goto restart;
1057d748f7efSMark Johnston 		}
1058d748f7efSMark Johnston 	}
1059d748f7efSMark Johnston 	ND6_WUNLOCK();
1060d748f7efSMark Johnston 
1061d748f7efSMark Johnston 	while ((pr = LIST_FIRST(&prl)) != NULL) {
1062d748f7efSMark Johnston 		LIST_REMOVE(pr, ndpr_entry);
1063d748f7efSMark Johnston 		nd6_prefix_del(pr);
106482cd038dSYoshinobu Inoue 	}
106599a0c406SBjoern A. Zeeb 
106699a0c406SBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz,
106799a0c406SBjoern A. Zeeb 	    nd6_timer, curvnet);
106899a0c406SBjoern A. Zeeb 
10698b615593SMarko Zec 	CURVNET_RESTORE();
107082cd038dSYoshinobu Inoue }
107182cd038dSYoshinobu Inoue 
10721272577eSXin LI /*
10731272577eSXin LI  * ia6 - deprecated/invalidated temporary address
10741272577eSXin LI  */
107533841545SHajimu UMEMOTO static int
10761272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6)
107733841545SHajimu UMEMOTO {
107833841545SHajimu UMEMOTO 	struct ifaddr *ifa;
107933841545SHajimu UMEMOTO 	struct ifnet *ifp;
108033841545SHajimu UMEMOTO 	struct in6_ifaddr *public_ifa6 = NULL;
108133841545SHajimu UMEMOTO 
1082b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
1083b8a6e03fSGleb Smirnoff 
108433841545SHajimu UMEMOTO 	ifp = ia6->ia_ifa.ifa_ifp;
1085d7c5a620SMatt Macy 	CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
108633841545SHajimu UMEMOTO 		struct in6_ifaddr *it6;
108733841545SHajimu UMEMOTO 
108833841545SHajimu UMEMOTO 		if (ifa->ifa_addr->sa_family != AF_INET6)
108933841545SHajimu UMEMOTO 			continue;
109033841545SHajimu UMEMOTO 
109133841545SHajimu UMEMOTO 		it6 = (struct in6_ifaddr *)ifa;
109233841545SHajimu UMEMOTO 
109333841545SHajimu UMEMOTO 		/* ignore no autoconf addresses. */
109433841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
109533841545SHajimu UMEMOTO 			continue;
109633841545SHajimu UMEMOTO 
109733841545SHajimu UMEMOTO 		/* ignore autoconf addresses with different prefixes. */
109833841545SHajimu UMEMOTO 		if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
109933841545SHajimu UMEMOTO 			continue;
110033841545SHajimu UMEMOTO 
110133841545SHajimu UMEMOTO 		/*
110233841545SHajimu UMEMOTO 		 * Now we are looking at an autoconf address with the same
110333841545SHajimu UMEMOTO 		 * prefix as ours.  If the address is temporary and is still
110433841545SHajimu UMEMOTO 		 * preferred, do not create another one.  It would be rare, but
110533841545SHajimu UMEMOTO 		 * could happen, for example, when we resume a laptop PC after
110633841545SHajimu UMEMOTO 		 * a long period.
110733841545SHajimu UMEMOTO 		 */
110833841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
110933841545SHajimu UMEMOTO 		    !IFA6_IS_DEPRECATED(it6)) {
111033841545SHajimu UMEMOTO 			public_ifa6 = NULL;
111133841545SHajimu UMEMOTO 			break;
111233841545SHajimu UMEMOTO 		}
111333841545SHajimu UMEMOTO 
111433841545SHajimu UMEMOTO 		/*
111533841545SHajimu UMEMOTO 		 * This is a public autoconf address that has the same prefix
111633841545SHajimu UMEMOTO 		 * as ours.  If it is preferred, keep it.  We can't break the
111733841545SHajimu UMEMOTO 		 * loop here, because there may be a still-preferred temporary
111833841545SHajimu UMEMOTO 		 * address with the prefix.
111933841545SHajimu UMEMOTO 		 */
112033841545SHajimu UMEMOTO 		if (!IFA6_IS_DEPRECATED(it6))
112133841545SHajimu UMEMOTO 			public_ifa6 = it6;
1122dff78447SMark Johnston 	}
1123c1752bcdSQing Li 	if (public_ifa6 != NULL)
1124c1752bcdSQing Li 		ifa_ref(&public_ifa6->ia_ifa);
112533841545SHajimu UMEMOTO 
112633841545SHajimu UMEMOTO 	if (public_ifa6 != NULL) {
112733841545SHajimu UMEMOTO 		int e;
112833841545SHajimu UMEMOTO 
1129743eee66SSUZUKI Shinsuke 		if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
1130c1752bcdSQing Li 			ifa_free(&public_ifa6->ia_ifa);
113133841545SHajimu UMEMOTO 			log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
113233841545SHajimu UMEMOTO 			    " tmp addr,errno=%d\n", e);
113333841545SHajimu UMEMOTO 			return (-1);
113433841545SHajimu UMEMOTO 		}
1135c1752bcdSQing Li 		ifa_free(&public_ifa6->ia_ifa);
113633841545SHajimu UMEMOTO 		return (0);
113733841545SHajimu UMEMOTO 	}
113833841545SHajimu UMEMOTO 
113933841545SHajimu UMEMOTO 	return (-1);
114033841545SHajimu UMEMOTO }
114133841545SHajimu UMEMOTO 
1142686cdd19SJun-ichiro itojun Hagino /*
1143df890b8eSMark Johnston  * Remove prefix and default router list entries corresponding to ifp. Neighbor
1144df890b8eSMark Johnston  * cache entries are freed in in6_domifdetach().
1145686cdd19SJun-ichiro itojun Hagino  */
1146686cdd19SJun-ichiro itojun Hagino void
11471272577eSXin LI nd6_purge(struct ifnet *ifp)
1148686cdd19SJun-ichiro itojun Hagino {
11494de485feSMark Johnston 	struct nd_drhead drq;
1150d748f7efSMark Johnston 	struct nd_prhead prl;
1151743eee66SSUZUKI Shinsuke 	struct nd_defrouter *dr, *ndr;
1152686cdd19SJun-ichiro itojun Hagino 	struct nd_prefix *pr, *npr;
1153686cdd19SJun-ichiro itojun Hagino 
11544de485feSMark Johnston 	TAILQ_INIT(&drq);
1155d748f7efSMark Johnston 	LIST_INIT(&prl);
11564de485feSMark Johnston 
1157686cdd19SJun-ichiro itojun Hagino 	/*
1158743eee66SSUZUKI Shinsuke 	 * Nuke default router list entries toward ifp.
1159743eee66SSUZUKI Shinsuke 	 * We defer removal of default router list entries that is installed
1160743eee66SSUZUKI Shinsuke 	 * in the routing table, in order to keep additional side effects as
1161743eee66SSUZUKI Shinsuke 	 * small as possible.
1162686cdd19SJun-ichiro itojun Hagino 	 */
11634de485feSMark Johnston 	ND6_WLOCK();
11643b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
1165743eee66SSUZUKI Shinsuke 		if (dr->installed)
1166743eee66SSUZUKI Shinsuke 			continue;
1167686cdd19SJun-ichiro itojun Hagino 		if (dr->ifp == ifp)
11684de485feSMark Johnston 			defrouter_unlink(dr, &drq);
1169686cdd19SJun-ichiro itojun Hagino 	}
11703b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
1171743eee66SSUZUKI Shinsuke 		if (!dr->installed)
1172743eee66SSUZUKI Shinsuke 			continue;
1173686cdd19SJun-ichiro itojun Hagino 		if (dr->ifp == ifp)
11744de485feSMark Johnston 			defrouter_unlink(dr, &drq);
11754de485feSMark Johnston 	}
1176d748f7efSMark Johnston 
1177d748f7efSMark Johnston 	/*
1178d748f7efSMark Johnston 	 * Remove prefixes on ifp. We should have already removed addresses on
1179d748f7efSMark Johnston 	 * this interface, so no addresses should be referencing these prefixes.
1180d748f7efSMark Johnston 	 */
1181d748f7efSMark Johnston 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1182d748f7efSMark Johnston 		if (pr->ndpr_ifp == ifp)
1183d748f7efSMark Johnston 			nd6_prefix_unlink(pr, &prl);
1184d748f7efSMark Johnston 	}
11854de485feSMark Johnston 	ND6_WUNLOCK();
11864de485feSMark Johnston 
1187d748f7efSMark Johnston 	/* Delete the unlinked router and prefix objects. */
11884de485feSMark Johnston 	while ((dr = TAILQ_FIRST(&drq)) != NULL) {
11894de485feSMark Johnston 		TAILQ_REMOVE(&drq, dr, dr_entry);
11904de485feSMark Johnston 		defrouter_del(dr);
1191686cdd19SJun-ichiro itojun Hagino 	}
1192d748f7efSMark Johnston 	while ((pr = LIST_FIRST(&prl)) != NULL) {
1193d748f7efSMark Johnston 		LIST_REMOVE(pr, ndpr_entry);
1194d748f7efSMark Johnston 		nd6_prefix_del(pr);
1195686cdd19SJun-ichiro itojun Hagino 	}
1196686cdd19SJun-ichiro itojun Hagino 
1197686cdd19SJun-ichiro itojun Hagino 	/* cancel default outgoing interface setting */
1198603724d3SBjoern A. Zeeb 	if (V_nd6_defifindex == ifp->if_index)
1199686cdd19SJun-ichiro itojun Hagino 		nd6_setdefaultiface(0);
1200686cdd19SJun-ichiro itojun Hagino 
1201e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1202a283298cSHiroki Sato 		/* Refresh default router list. */
1203559b4296SAlan Somers 		defrouter_select_fib(ifp->if_fib);
12046e6b3f7cSQing Li 	}
12051026ccc4SHajimu UMEMOTO }
1206686cdd19SJun-ichiro itojun Hagino 
1207686cdd19SJun-ichiro itojun Hagino /*
12086e6b3f7cSQing Li  * the caller acquires and releases the lock on the lltbls
12096e6b3f7cSQing Li  * Returns the llentry locked
1210686cdd19SJun-ichiro itojun Hagino  */
12116e6b3f7cSQing Li struct llentry *
1212f0316e1aSAlexander V. Chernikov nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
121382cd038dSYoshinobu Inoue {
121482cd038dSYoshinobu Inoue 	struct sockaddr_in6 sin6;
12156e6b3f7cSQing Li 	struct llentry *ln;
121682cd038dSYoshinobu Inoue 
121782cd038dSYoshinobu Inoue 	bzero(&sin6, sizeof(sin6));
121882cd038dSYoshinobu Inoue 	sin6.sin6_len = sizeof(struct sockaddr_in6);
121982cd038dSYoshinobu Inoue 	sin6.sin6_family = AF_INET6;
122082cd038dSYoshinobu Inoue 	sin6.sin6_addr = *addr6;
1221686cdd19SJun-ichiro itojun Hagino 
12226e6b3f7cSQing Li 	IF_AFDATA_LOCK_ASSERT(ifp);
122382cd038dSYoshinobu Inoue 
1224f506d933SAlexander V. Chernikov 	ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6);
1225b4b1367aSAlexander V. Chernikov 
1226b4b1367aSAlexander V. Chernikov 	return (ln);
1227b4b1367aSAlexander V. Chernikov }
1228b4b1367aSAlexander V. Chernikov 
1229b4b1367aSAlexander V. Chernikov struct llentry *
1230f0316e1aSAlexander V. Chernikov nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1231b4b1367aSAlexander V. Chernikov {
1232b4b1367aSAlexander V. Chernikov 	struct sockaddr_in6 sin6;
1233b4b1367aSAlexander V. Chernikov 	struct llentry *ln;
1234b4b1367aSAlexander V. Chernikov 
1235b4b1367aSAlexander V. Chernikov 	bzero(&sin6, sizeof(sin6));
1236b4b1367aSAlexander V. Chernikov 	sin6.sin6_len = sizeof(struct sockaddr_in6);
1237b4b1367aSAlexander V. Chernikov 	sin6.sin6_family = AF_INET6;
1238b4b1367aSAlexander V. Chernikov 	sin6.sin6_addr = *addr6;
1239b4b1367aSAlexander V. Chernikov 
12405a255516SAlexander V. Chernikov 	ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6);
1241b4b1367aSAlexander V. Chernikov 	if (ln != NULL)
124282cd038dSYoshinobu Inoue 		ln->ln_state = ND6_LLINFO_NOSTATE;
12436e6b3f7cSQing Li 
12446e6b3f7cSQing Li 	return (ln);
124582cd038dSYoshinobu Inoue }
124682cd038dSYoshinobu Inoue 
124782cd038dSYoshinobu Inoue /*
124877b691e0SBrian Feldman  * Test whether a given IPv6 address is a neighbor or not, ignoring
124977b691e0SBrian Feldman  * the actual neighbor cache.  The neighbor cache is ignored in order
125077b691e0SBrian Feldman  * to not reenter the routing code from within itself.
125182cd038dSYoshinobu Inoue  */
125277b691e0SBrian Feldman static int
1253f0316e1aSAlexander V. Chernikov nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
125482cd038dSYoshinobu Inoue {
12554208ea14SHajimu UMEMOTO 	struct nd_prefix *pr;
1256559b4296SAlan Somers 	struct ifaddr *ifa;
12579a1b64d5SAlexander V. Chernikov 	struct rt_addrinfo info;
12589a1b64d5SAlexander V. Chernikov 	struct sockaddr_in6 rt_key;
1259f7d91d8cSMark Johnston 	const struct sockaddr *dst6;
1260d748f7efSMark Johnston 	uint64_t genid;
1261d748f7efSMark Johnston 	int error, fibnum;
126282cd038dSYoshinobu Inoue 
1263686cdd19SJun-ichiro itojun Hagino 	/*
1264686cdd19SJun-ichiro itojun Hagino 	 * A link-local address is always a neighbor.
12654208ea14SHajimu UMEMOTO 	 * XXX: a link does not necessarily specify a single interface.
1266686cdd19SJun-ichiro itojun Hagino 	 */
1267a1f7e5f8SHajimu UMEMOTO 	if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
1268a1f7e5f8SHajimu UMEMOTO 		struct sockaddr_in6 sin6_copy;
1269a1f7e5f8SHajimu UMEMOTO 		u_int32_t zone;
1270a1f7e5f8SHajimu UMEMOTO 
1271a1f7e5f8SHajimu UMEMOTO 		/*
1272a1f7e5f8SHajimu UMEMOTO 		 * We need sin6_copy since sa6_recoverscope() may modify the
1273a1f7e5f8SHajimu UMEMOTO 		 * content (XXX).
1274a1f7e5f8SHajimu UMEMOTO 		 */
1275a1f7e5f8SHajimu UMEMOTO 		sin6_copy = *addr;
1276a1f7e5f8SHajimu UMEMOTO 		if (sa6_recoverscope(&sin6_copy))
1277a1f7e5f8SHajimu UMEMOTO 			return (0); /* XXX: should be impossible */
1278a1f7e5f8SHajimu UMEMOTO 		if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
1279a1f7e5f8SHajimu UMEMOTO 			return (0);
1280a1f7e5f8SHajimu UMEMOTO 		if (sin6_copy.sin6_scope_id == zone)
128182cd038dSYoshinobu Inoue 			return (1);
1282a1f7e5f8SHajimu UMEMOTO 		else
1283a1f7e5f8SHajimu UMEMOTO 			return (0);
1284a1f7e5f8SHajimu UMEMOTO 	}
128582cd038dSYoshinobu Inoue 
12869a1b64d5SAlexander V. Chernikov 	bzero(&rt_key, sizeof(rt_key));
12879a1b64d5SAlexander V. Chernikov 	bzero(&info, sizeof(info));
12889a1b64d5SAlexander V. Chernikov 	info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key;
12899a1b64d5SAlexander V. Chernikov 
129082cd038dSYoshinobu Inoue 	/*
129182cd038dSYoshinobu Inoue 	 * If the address matches one of our addresses,
129282cd038dSYoshinobu Inoue 	 * it should be a neighbor.
12934208ea14SHajimu UMEMOTO 	 * If the address matches one of our on-link prefixes, it should be a
12944208ea14SHajimu UMEMOTO 	 * neighbor.
129582cd038dSYoshinobu Inoue 	 */
1296d748f7efSMark Johnston 	ND6_RLOCK();
1297d748f7efSMark Johnston restart:
12983b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
12994208ea14SHajimu UMEMOTO 		if (pr->ndpr_ifp != ifp)
13004208ea14SHajimu UMEMOTO 			continue;
130182cd038dSYoshinobu Inoue 
1302d748f7efSMark Johnston 		if ((pr->ndpr_stateflags & NDPRF_ONLINK) == 0) {
1303f7d91d8cSMark Johnston 			dst6 = (const struct sockaddr *)&pr->ndpr_prefix;
13049a1b64d5SAlexander V. Chernikov 
1305559b4296SAlan Somers 			/*
1306559b4296SAlan Somers 			 * We only need to check all FIBs if add_addr_allfibs
1307559b4296SAlan Somers 			 * is unset. If set, checking any FIB will suffice.
1308559b4296SAlan Somers 			 */
1309559b4296SAlan Somers 			fibnum = V_rt_add_addr_allfibs ? rt_numfibs - 1 : 0;
1310559b4296SAlan Somers 			for (; fibnum < rt_numfibs; fibnum++) {
1311d748f7efSMark Johnston 				genid = V_nd6_list_genid;
1312d748f7efSMark Johnston 				ND6_RUNLOCK();
1313d748f7efSMark Johnston 
1314559b4296SAlan Somers 				/*
1315559b4296SAlan Somers 				 * Restore length field before
1316559b4296SAlan Somers 				 * retrying lookup
1317559b4296SAlan Somers 				 */
13189a1b64d5SAlexander V. Chernikov 				rt_key.sin6_len = sizeof(rt_key);
1319559b4296SAlan Somers 				error = rib_lookup_info(fibnum, dst6, 0, 0,
1320559b4296SAlan Somers 						        &info);
1321d748f7efSMark Johnston 
1322d748f7efSMark Johnston 				ND6_RLOCK();
1323d748f7efSMark Johnston 				if (genid != V_nd6_list_genid)
1324d748f7efSMark Johnston 					goto restart;
1325559b4296SAlan Somers 				if (error == 0)
1326559b4296SAlan Somers 					break;
1327559b4296SAlan Somers 			}
1328d748f7efSMark Johnston 			if (error != 0)
13294208ea14SHajimu UMEMOTO 				continue;
1330d748f7efSMark Johnston 
1331baf7c373SQing Li 			/*
1332baf7c373SQing Li 			 * This is the case where multiple interfaces
1333baf7c373SQing Li 			 * have the same prefix, but only one is installed
1334baf7c373SQing Li 			 * into the routing table and that prefix entry
1335baf7c373SQing Li 			 * is not the one being examined here. In the case
1336baf7c373SQing Li 			 * where RADIX_MPATH is enabled, multiple route
1337baf7c373SQing Li 			 * entries (of the same rt_key value) will be
1338baf7c373SQing Li 			 * installed because the interface addresses all
1339baf7c373SQing Li 			 * differ.
1340baf7c373SQing Li 			 */
1341baf7c373SQing Li 			if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
13429a1b64d5SAlexander V. Chernikov 			    &rt_key.sin6_addr))
1343baf7c373SQing Li 				continue;
1344baf7c373SQing Li 		}
13454208ea14SHajimu UMEMOTO 
13464208ea14SHajimu UMEMOTO 		if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
1347d748f7efSMark Johnston 		    &addr->sin6_addr, &pr->ndpr_mask)) {
1348d748f7efSMark Johnston 			ND6_RUNLOCK();
13494208ea14SHajimu UMEMOTO 			return (1);
135082cd038dSYoshinobu Inoue 		}
1351d748f7efSMark Johnston 	}
1352d748f7efSMark Johnston 	ND6_RUNLOCK();
13534208ea14SHajimu UMEMOTO 
13544208ea14SHajimu UMEMOTO 	/*
1355743eee66SSUZUKI Shinsuke 	 * If the address is assigned on the node of the other side of
1356743eee66SSUZUKI Shinsuke 	 * a p2p interface, the address should be a neighbor.
1357743eee66SSUZUKI Shinsuke 	 */
1358559b4296SAlan Somers 	if (ifp->if_flags & IFF_POINTOPOINT) {
1359a68cc388SGleb Smirnoff 		struct epoch_tracker et;
1360a68cc388SGleb Smirnoff 
1361a68cc388SGleb Smirnoff 		NET_EPOCH_ENTER(et);
1362d7c5a620SMatt Macy 		CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1363559b4296SAlan Somers 			if (ifa->ifa_addr->sa_family != addr->sin6_family)
1364559b4296SAlan Somers 				continue;
1365559b4296SAlan Somers 			if (ifa->ifa_dstaddr != NULL &&
1366559b4296SAlan Somers 			    sa_equal(addr, ifa->ifa_dstaddr)) {
1367a68cc388SGleb Smirnoff 				NET_EPOCH_EXIT(et);
1368559b4296SAlan Somers 				return 1;
13698c0fec80SRobert Watson 			}
1370559b4296SAlan Somers 		}
1371a68cc388SGleb Smirnoff 		NET_EPOCH_EXIT(et);
13728c0fec80SRobert Watson 	}
1373743eee66SSUZUKI Shinsuke 
1374743eee66SSUZUKI Shinsuke 	/*
13754208ea14SHajimu UMEMOTO 	 * If the default router list is empty, all addresses are regarded
13764208ea14SHajimu UMEMOTO 	 * as on-link, and thus, as a neighbor.
13774208ea14SHajimu UMEMOTO 	 */
1378e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV &&
13793b0b2840SJohn Baldwin 	    TAILQ_EMPTY(&V_nd_defrouter) &&
1380603724d3SBjoern A. Zeeb 	    V_nd6_defifindex == ifp->if_index) {
138182cd038dSYoshinobu Inoue 		return (1);
138282cd038dSYoshinobu Inoue 	}
138382cd038dSYoshinobu Inoue 
138477b691e0SBrian Feldman 	return (0);
138577b691e0SBrian Feldman }
138677b691e0SBrian Feldman 
138777b691e0SBrian Feldman 
138877b691e0SBrian Feldman /*
138977b691e0SBrian Feldman  * Detect if a given IPv6 address identifies a neighbor on a given link.
139077b691e0SBrian Feldman  * XXX: should take care of the destination of a p2p link?
139177b691e0SBrian Feldman  */
139277b691e0SBrian Feldman int
1393f0316e1aSAlexander V. Chernikov nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
139477b691e0SBrian Feldman {
13956e6b3f7cSQing Li 	struct llentry *lle;
13966e6b3f7cSQing Li 	int rc = 0;
139777b691e0SBrian Feldman 
1398b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
13996e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
140077b691e0SBrian Feldman 	if (nd6_is_new_addr_neighbor(addr, ifp))
140177b691e0SBrian Feldman 		return (1);
140277b691e0SBrian Feldman 
140382cd038dSYoshinobu Inoue 	/*
140482cd038dSYoshinobu Inoue 	 * Even if the address matches none of our addresses, it might be
140582cd038dSYoshinobu Inoue 	 * in the neighbor cache.
140682cd038dSYoshinobu Inoue 	 */
14076e6b3f7cSQing Li 	if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) {
14086e6b3f7cSQing Li 		LLE_RUNLOCK(lle);
14096e6b3f7cSQing Li 		rc = 1;
14106e6b3f7cSQing Li 	}
14116e6b3f7cSQing Li 	return (rc);
141282cd038dSYoshinobu Inoue }
141382cd038dSYoshinobu Inoue 
141482cd038dSYoshinobu Inoue /*
141582cd038dSYoshinobu Inoue  * Free an nd6 llinfo entry.
1416743eee66SSUZUKI Shinsuke  * Since the function would cause significant changes in the kernel, DO NOT
1417743eee66SSUZUKI Shinsuke  * make it global, unless you have a strong reason for the change, and are sure
1418743eee66SSUZUKI Shinsuke  * that the change is safe.
1419c0b8aeaeSAlexander V. Chernikov  *
1420c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
142182cd038dSYoshinobu Inoue  */
1422c0b8aeaeSAlexander V. Chernikov static __noinline void
1423435bece4SMark Johnston nd6_free(struct llentry **lnp, int gc)
142482cd038dSYoshinobu Inoue {
1425e6950476SBjoern A. Zeeb 	struct ifnet *ifp;
1426435bece4SMark Johnston 	struct llentry *ln;
1427435bece4SMark Johnston 	struct nd_defrouter *dr;
1428435bece4SMark Johnston 
1429435bece4SMark Johnston 	ln = *lnp;
1430435bece4SMark Johnston 	*lnp = NULL;
1431e6950476SBjoern A. Zeeb 
1432e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
1433435bece4SMark Johnston 	ND6_RLOCK_ASSERT();
1434435bece4SMark Johnston 
1435435bece4SMark Johnston 	ifp = lltable_get_ifp(ln->lle_tbl);
1436435bece4SMark Johnston 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0)
1437435bece4SMark Johnston 		dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp);
1438435bece4SMark Johnston 	else
1439435bece4SMark Johnston 		dr = NULL;
1440435bece4SMark Johnston 	ND6_RUNLOCK();
1441435bece4SMark Johnston 
1442435bece4SMark Johnston 	if ((ln->la_flags & LLE_DELETED) == 0)
1443435bece4SMark Johnston 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
144482cd038dSYoshinobu Inoue 
144582cd038dSYoshinobu Inoue 	/*
144633841545SHajimu UMEMOTO 	 * we used to have pfctlinput(PRC_HOSTDEAD) here.
144733841545SHajimu UMEMOTO 	 * even though it is not harmful, it was not really necessary.
144882cd038dSYoshinobu Inoue 	 */
1449686cdd19SJun-ichiro itojun Hagino 
1450743eee66SSUZUKI Shinsuke 	/* cancel timer */
1451e6950476SBjoern A. Zeeb 	nd6_llinfo_settimer_locked(ln, -1);
1452e6950476SBjoern A. Zeeb 
1453e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1454743eee66SSUZUKI Shinsuke 		if (dr != NULL && dr->expire &&
1455743eee66SSUZUKI Shinsuke 		    ln->ln_state == ND6_LLINFO_STALE && gc) {
1456743eee66SSUZUKI Shinsuke 			/*
1457743eee66SSUZUKI Shinsuke 			 * If the reason for the deletion is just garbage
1458743eee66SSUZUKI Shinsuke 			 * collection, and the neighbor is an active default
1459743eee66SSUZUKI Shinsuke 			 * router, do not delete it.  Instead, reset the GC
1460743eee66SSUZUKI Shinsuke 			 * timer using the router's lifetime.
1461743eee66SSUZUKI Shinsuke 			 * Simply deleting the entry would affect default
1462743eee66SSUZUKI Shinsuke 			 * router selection, which is not necessarily a good
1463743eee66SSUZUKI Shinsuke 			 * thing, especially when we're using router preference
1464743eee66SSUZUKI Shinsuke 			 * values.
1465743eee66SSUZUKI Shinsuke 			 * XXX: the check for ln_state would be redundant,
1466743eee66SSUZUKI Shinsuke 			 *      but we intentionally keep it just in case.
1467743eee66SSUZUKI Shinsuke 			 */
14687d26db17SHiroki Sato 			if (dr->expire > time_uptime)
1469e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
14707d26db17SHiroki Sato 				    (dr->expire - time_uptime) * hz);
1471743eee66SSUZUKI Shinsuke 			else
1472e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
1473e6950476SBjoern A. Zeeb 				    (long)V_nd6_gctimer * hz);
1474e6950476SBjoern A. Zeeb 
1475ef8d671cSHajimu UMEMOTO 			LLE_REMREF(ln);
1476ef8d671cSHajimu UMEMOTO 			LLE_WUNLOCK(ln);
14774de485feSMark Johnston 			defrouter_rele(dr);
1478d3cdb716SAlexander V. Chernikov 			return;
1479743eee66SSUZUKI Shinsuke 		}
1480743eee66SSUZUKI Shinsuke 
1481686cdd19SJun-ichiro itojun Hagino 		if (dr) {
1482686cdd19SJun-ichiro itojun Hagino 			/*
1483686cdd19SJun-ichiro itojun Hagino 			 * Unreachablity of a router might affect the default
1484686cdd19SJun-ichiro itojun Hagino 			 * router selection and on-link detection of advertised
1485686cdd19SJun-ichiro itojun Hagino 			 * prefixes.
1486686cdd19SJun-ichiro itojun Hagino 			 */
1487686cdd19SJun-ichiro itojun Hagino 
1488686cdd19SJun-ichiro itojun Hagino 			/*
1489686cdd19SJun-ichiro itojun Hagino 			 * Temporarily fake the state to choose a new default
1490686cdd19SJun-ichiro itojun Hagino 			 * router and to perform on-link determination of
149188ff5695SSUZUKI Shinsuke 			 * prefixes correctly.
1492686cdd19SJun-ichiro itojun Hagino 			 * Below the state will be set correctly,
1493686cdd19SJun-ichiro itojun Hagino 			 * or the entry itself will be deleted.
1494686cdd19SJun-ichiro itojun Hagino 			 */
1495686cdd19SJun-ichiro itojun Hagino 			ln->ln_state = ND6_LLINFO_INCOMPLETE;
14961d5089c2SBjoern A. Zeeb 		}
1497686cdd19SJun-ichiro itojun Hagino 
14981d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr) {
14991d5089c2SBjoern A. Zeeb 
15001d5089c2SBjoern A. Zeeb 			/*
15011d5089c2SBjoern A. Zeeb 			 * We need to unlock to avoid a LOR with rt6_flush() with the
15021d5089c2SBjoern A. Zeeb 			 * rnh and for the calls to pfxlist_onlink_check() and
1503559b4296SAlan Somers 			 * defrouter_select_fib() in the block further down for calls
15041d5089c2SBjoern A. Zeeb 			 * into nd6_lookup().  We still hold a ref.
15051d5089c2SBjoern A. Zeeb 			 */
15061d5089c2SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
15071d5089c2SBjoern A. Zeeb 
15081d5089c2SBjoern A. Zeeb 			/*
15091d5089c2SBjoern A. Zeeb 			 * rt6_flush must be called whether or not the neighbor
15101d5089c2SBjoern A. Zeeb 			 * is in the Default Router List.
15111d5089c2SBjoern A. Zeeb 			 * See a corresponding comment in nd6_na_input().
15121d5089c2SBjoern A. Zeeb 			 */
1513314294deSAlexander V. Chernikov 			rt6_flush(&ln->r_l3addr.addr6, ifp);
15141d5089c2SBjoern A. Zeeb 		}
15151d5089c2SBjoern A. Zeeb 
15161d5089c2SBjoern A. Zeeb 		if (dr) {
151733841545SHajimu UMEMOTO 			/*
1518559b4296SAlan Somers 			 * Since defrouter_select_fib() does not affect the
151933841545SHajimu UMEMOTO 			 * on-link determination and MIP6 needs the check
152033841545SHajimu UMEMOTO 			 * before the default router selection, we perform
152133841545SHajimu UMEMOTO 			 * the check now.
152233841545SHajimu UMEMOTO 			 */
152333841545SHajimu UMEMOTO 			pfxlist_onlink_check();
152433841545SHajimu UMEMOTO 
1525686cdd19SJun-ichiro itojun Hagino 			/*
15261d5089c2SBjoern A. Zeeb 			 * Refresh default router list.
1527686cdd19SJun-ichiro itojun Hagino 			 */
1528559b4296SAlan Somers 			defrouter_select_fib(dr->ifp->if_fib);
1529686cdd19SJun-ichiro itojun Hagino 		}
15301d5089c2SBjoern A. Zeeb 
153117a03656SEric van Gyzen 		/*
153217a03656SEric van Gyzen 		 * If this entry was added by an on-link redirect, remove the
153317a03656SEric van Gyzen 		 * corresponding host route.
153417a03656SEric van Gyzen 		 */
153517a03656SEric van Gyzen 		if (ln->la_flags & LLE_REDIRECT)
153617a03656SEric van Gyzen 			nd6_free_redirect(ln);
153717a03656SEric van Gyzen 
15381d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr)
15391d5089c2SBjoern A. Zeeb 			LLE_WLOCK(ln);
154082cd038dSYoshinobu Inoue 	}
154182cd038dSYoshinobu Inoue 
154233841545SHajimu UMEMOTO 	/*
1543e6950476SBjoern A. Zeeb 	 * Save to unlock. We still hold an extra reference and will not
1544e6950476SBjoern A. Zeeb 	 * free(9) in llentry_free() if someone else holds one as well.
1545e6950476SBjoern A. Zeeb 	 */
1546e6950476SBjoern A. Zeeb 	LLE_WUNLOCK(ln);
15476e6b3f7cSQing Li 	IF_AFDATA_LOCK(ifp);
15486e6b3f7cSQing Li 	LLE_WLOCK(ln);
1549b1ec2940SGleb Smirnoff 	/* Guard against race with other llentry_free(). */
1550b1ec2940SGleb Smirnoff 	if (ln->la_flags & LLE_LINKED) {
1551d3cdb716SAlexander V. Chernikov 		/* Remove callout reference */
1552becba438SBjoern A. Zeeb 		LLE_REMREF(ln);
1553d3cdb716SAlexander V. Chernikov 		lltable_unlink_entry(ln->lle_tbl, ln);
1554d3cdb716SAlexander V. Chernikov 	}
15556e6b3f7cSQing Li 	IF_AFDATA_UNLOCK(ifp);
155633841545SHajimu UMEMOTO 
1557d3cdb716SAlexander V. Chernikov 	llentry_free(ln);
15584de485feSMark Johnston 	if (dr != NULL)
15594de485feSMark Johnston 		defrouter_rele(dr);
156082cd038dSYoshinobu Inoue }
156182cd038dSYoshinobu Inoue 
1562e8b0643eSAlexander V. Chernikov static int
1563e8b0643eSAlexander V. Chernikov nd6_isdynrte(const struct rtentry *rt, void *xap)
1564e8b0643eSAlexander V. Chernikov {
1565e8b0643eSAlexander V. Chernikov 
1566e8b0643eSAlexander V. Chernikov 	if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC))
1567e8b0643eSAlexander V. Chernikov 		return (1);
1568e8b0643eSAlexander V. Chernikov 
1569e8b0643eSAlexander V. Chernikov 	return (0);
1570e8b0643eSAlexander V. Chernikov }
157182cd038dSYoshinobu Inoue /*
157217a03656SEric van Gyzen  * Remove the rtentry for the given llentry,
157317a03656SEric van Gyzen  * both of which were installed by a redirect.
157417a03656SEric van Gyzen  */
157517a03656SEric van Gyzen static void
157617a03656SEric van Gyzen nd6_free_redirect(const struct llentry *ln)
157717a03656SEric van Gyzen {
157817a03656SEric van Gyzen 	int fibnum;
157917a03656SEric van Gyzen 	struct sockaddr_in6 sin6;
1580e8b0643eSAlexander V. Chernikov 	struct rt_addrinfo info;
158117a03656SEric van Gyzen 
158217a03656SEric van Gyzen 	lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6);
1583e8b0643eSAlexander V. Chernikov 	memset(&info, 0, sizeof(info));
1584e8b0643eSAlexander V. Chernikov 	info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6;
1585e8b0643eSAlexander V. Chernikov 	info.rti_filter = nd6_isdynrte;
158617a03656SEric van Gyzen 
1587e8b0643eSAlexander V. Chernikov 	for (fibnum = 0; fibnum < rt_numfibs; fibnum++)
1588e8b0643eSAlexander V. Chernikov 		rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum);
158917a03656SEric van Gyzen }
159017a03656SEric van Gyzen 
159117a03656SEric van Gyzen /*
15920f1aca65SQing Li  * Rejuvenate this function for routing operations related
15930f1aca65SQing Li  * processing.
15940f1aca65SQing Li  */
15950f1aca65SQing Li void
15960f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
15970f1aca65SQing Li {
159839e19560SBjoern A. Zeeb 	struct sockaddr_in6 *gateway;
15990f1aca65SQing Li 	struct nd_defrouter *dr;
160039e19560SBjoern A. Zeeb 	struct ifnet *ifp;
16010f1aca65SQing Li 
160239e19560SBjoern A. Zeeb 	gateway = (struct sockaddr_in6 *)rt->rt_gateway;
160339e19560SBjoern A. Zeeb 	ifp = rt->rt_ifp;
16040f1aca65SQing Li 
16050f1aca65SQing Li 	switch (req) {
16060f1aca65SQing Li 	case RTM_ADD:
16070f1aca65SQing Li 		break;
16080f1aca65SQing Li 
16090f1aca65SQing Li 	case RTM_DELETE:
16100f1aca65SQing Li 		if (!ifp)
16110f1aca65SQing Li 			return;
16120f1aca65SQing Li 		/*
16130f1aca65SQing Li 		 * Only indirect routes are interesting.
16140f1aca65SQing Li 		 */
16150f1aca65SQing Li 		if ((rt->rt_flags & RTF_GATEWAY) == 0)
16160f1aca65SQing Li 			return;
16170f1aca65SQing Li 		/*
16180f1aca65SQing Li 		 * check for default route
16190f1aca65SQing Li 		 */
16200f1aca65SQing Li 		if (IN6_ARE_ADDR_EQUAL(&in6addr_any,
16210f1aca65SQing Li 		    &SIN6(rt_key(rt))->sin6_addr)) {
16220f1aca65SQing Li 			dr = defrouter_lookup(&gateway->sin6_addr, ifp);
16234de485feSMark Johnston 			if (dr != NULL) {
16240f1aca65SQing Li 				dr->installed = 0;
16254de485feSMark Johnston 				defrouter_rele(dr);
16264de485feSMark Johnston 			}
16270f1aca65SQing Li 		}
16280f1aca65SQing Li 		break;
16290f1aca65SQing Li 	}
16300f1aca65SQing Li }
16310f1aca65SQing Li 
16320f1aca65SQing Li 
163382cd038dSYoshinobu Inoue int
16341272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
163582cd038dSYoshinobu Inoue {
163682cd038dSYoshinobu Inoue 	struct in6_ndireq *ndi = (struct in6_ndireq *)data;
163782cd038dSYoshinobu Inoue 	struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data;
1638686cdd19SJun-ichiro itojun Hagino 	struct in6_ndifreq *ndif = (struct in6_ndifreq *)data;
1639a68cc388SGleb Smirnoff 	struct epoch_tracker et;
1640d0bec2c5SHiroki Sato 	int error = 0;
164182cd038dSYoshinobu Inoue 
16420de0dd9bSHiroki Sato 	if (ifp->if_afdata[AF_INET6] == NULL)
16430de0dd9bSHiroki Sato 		return (EPFNOSUPPORT);
164482cd038dSYoshinobu Inoue 	switch (cmd) {
164533841545SHajimu UMEMOTO 	case OSIOCGIFINFO_IN6:
16462ce62dceSSUZUKI Shinsuke #define ND	ndi->ndi
164731b1bfe1SHajimu UMEMOTO 		/* XXX: old ndp(8) assumes a positive value for linkmtu. */
16482ce62dceSSUZUKI Shinsuke 		bzero(&ND, sizeof(ND));
16492ce62dceSSUZUKI Shinsuke 		ND.linkmtu = IN6_LINKMTU(ifp);
16502ce62dceSSUZUKI Shinsuke 		ND.maxmtu = ND_IFINFO(ifp)->maxmtu;
16512ce62dceSSUZUKI Shinsuke 		ND.basereachable = ND_IFINFO(ifp)->basereachable;
16522ce62dceSSUZUKI Shinsuke 		ND.reachable = ND_IFINFO(ifp)->reachable;
16532ce62dceSSUZUKI Shinsuke 		ND.retrans = ND_IFINFO(ifp)->retrans;
16542ce62dceSSUZUKI Shinsuke 		ND.flags = ND_IFINFO(ifp)->flags;
16552ce62dceSSUZUKI Shinsuke 		ND.recalctm = ND_IFINFO(ifp)->recalctm;
16562ce62dceSSUZUKI Shinsuke 		ND.chlim = ND_IFINFO(ifp)->chlim;
165733841545SHajimu UMEMOTO 		break;
165882cd038dSYoshinobu Inoue 	case SIOCGIFINFO_IN6:
16592ce62dceSSUZUKI Shinsuke 		ND = *ND_IFINFO(ifp);
166082cd038dSYoshinobu Inoue 		break;
1661b9204379SSUZUKI Shinsuke 	case SIOCSIFINFO_IN6:
1662b9204379SSUZUKI Shinsuke 		/*
1663b9204379SSUZUKI Shinsuke 		 * used to change host variables from userland.
1664a4641f4eSPedro F. Giffuni 		 * intended for a use on router to reflect RA configurations.
1665b9204379SSUZUKI Shinsuke 		 */
1666b9204379SSUZUKI Shinsuke 		/* 0 means 'unspecified' */
1667b9204379SSUZUKI Shinsuke 		if (ND.linkmtu != 0) {
1668b9204379SSUZUKI Shinsuke 			if (ND.linkmtu < IPV6_MMTU ||
1669b9204379SSUZUKI Shinsuke 			    ND.linkmtu > IN6_LINKMTU(ifp)) {
1670b9204379SSUZUKI Shinsuke 				error = EINVAL;
1671b9204379SSUZUKI Shinsuke 				break;
1672b9204379SSUZUKI Shinsuke 			}
1673b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->linkmtu = ND.linkmtu;
1674b9204379SSUZUKI Shinsuke 		}
1675b9204379SSUZUKI Shinsuke 
1676b9204379SSUZUKI Shinsuke 		if (ND.basereachable != 0) {
1677b9204379SSUZUKI Shinsuke 			int obasereachable = ND_IFINFO(ifp)->basereachable;
1678b9204379SSUZUKI Shinsuke 
1679b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->basereachable = ND.basereachable;
1680b9204379SSUZUKI Shinsuke 			if (ND.basereachable != obasereachable)
1681b9204379SSUZUKI Shinsuke 				ND_IFINFO(ifp)->reachable =
1682b9204379SSUZUKI Shinsuke 				    ND_COMPUTE_RTIME(ND.basereachable);
1683b9204379SSUZUKI Shinsuke 		}
1684b9204379SSUZUKI Shinsuke 		if (ND.retrans != 0)
1685b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->retrans = ND.retrans;
1686b9204379SSUZUKI Shinsuke 		if (ND.chlim != 0)
1687b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->chlim = ND.chlim;
1688b9204379SSUZUKI Shinsuke 		/* FALLTHROUGH */
1689686cdd19SJun-ichiro itojun Hagino 	case SIOCSIFINFO_FLAGS:
1690a283298cSHiroki Sato 	{
1691a283298cSHiroki Sato 		struct ifaddr *ifa;
1692a283298cSHiroki Sato 		struct in6_ifaddr *ia;
1693a283298cSHiroki Sato 
1694a283298cSHiroki Sato 		if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1695a283298cSHiroki Sato 		    !(ND.flags & ND6_IFF_IFDISABLED)) {
1696a283298cSHiroki Sato 			/* ifdisabled 1->0 transision */
1697a283298cSHiroki Sato 
1698a283298cSHiroki Sato 			/*
1699a283298cSHiroki Sato 			 * If the interface is marked as ND6_IFF_IFDISABLED and
1700a283298cSHiroki Sato 			 * has an link-local address with IN6_IFF_DUPLICATED,
1701a283298cSHiroki Sato 			 * do not clear ND6_IFF_IFDISABLED.
1702a283298cSHiroki Sato 			 * See RFC 4862, Section 5.4.5.
1703a283298cSHiroki Sato 			 */
1704ef2e580eSGleb Smirnoff 			NET_EPOCH_ENTER(et);
1705d7c5a620SMatt Macy 			CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1706a283298cSHiroki Sato 				if (ifa->ifa_addr->sa_family != AF_INET6)
1707a283298cSHiroki Sato 					continue;
1708a283298cSHiroki Sato 				ia = (struct in6_ifaddr *)ifa;
1709a283298cSHiroki Sato 				if ((ia->ia6_flags & IN6_IFF_DUPLICATED) &&
1710d0bec2c5SHiroki Sato 				    IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1711a283298cSHiroki Sato 					break;
1712a283298cSHiroki Sato 			}
1713ef2e580eSGleb Smirnoff 			NET_EPOCH_EXIT(et);
1714a283298cSHiroki Sato 
1715d0bec2c5SHiroki Sato 			if (ifa != NULL) {
1716d0bec2c5SHiroki Sato 				/* LLA is duplicated. */
1717a283298cSHiroki Sato 				ND.flags |= ND6_IFF_IFDISABLED;
1718a283298cSHiroki Sato 				log(LOG_ERR, "Cannot enable an interface"
1719a283298cSHiroki Sato 				    " with a link-local address marked"
1720a283298cSHiroki Sato 				    " duplicate.\n");
1721a283298cSHiroki Sato 			} else {
1722a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED;
1723154d5f73SHiroki Sato 				if (ifp->if_flags & IFF_UP)
1724a283298cSHiroki Sato 					in6_if_up(ifp);
1725a283298cSHiroki Sato 			}
1726a283298cSHiroki Sato 		} else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1727a283298cSHiroki Sato 			    (ND.flags & ND6_IFF_IFDISABLED)) {
1728a283298cSHiroki Sato 			/* ifdisabled 0->1 transision */
1729a283298cSHiroki Sato 			/* Mark all IPv6 address as tentative. */
1730a283298cSHiroki Sato 
1731a283298cSHiroki Sato 			ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
17326401c828SHiroki Sato 			if (V_ip6_dad_count > 0 &&
17336401c828SHiroki Sato 			    (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) {
1734ef2e580eSGleb Smirnoff 				NET_EPOCH_ENTER(et);
1735d7c5a620SMatt Macy 				CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead,
1736d0bec2c5SHiroki Sato 				    ifa_link) {
1737d0bec2c5SHiroki Sato 					if (ifa->ifa_addr->sa_family !=
1738d0bec2c5SHiroki Sato 					    AF_INET6)
1739a283298cSHiroki Sato 						continue;
1740a283298cSHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
1741a283298cSHiroki Sato 					ia->ia6_flags |= IN6_IFF_TENTATIVE;
1742a283298cSHiroki Sato 				}
1743ef2e580eSGleb Smirnoff 				NET_EPOCH_EXIT(et);
1744a283298cSHiroki Sato 			}
1745d0bec2c5SHiroki Sato 		}
1746a283298cSHiroki Sato 
1747154d5f73SHiroki Sato 		if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) {
1748154d5f73SHiroki Sato 			if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) {
1749a283298cSHiroki Sato 				/* auto_linklocal 0->1 transision */
1750a283298cSHiroki Sato 
1751a283298cSHiroki Sato 				/* If no link-local address on ifp, configure */
1752a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL;
1753a283298cSHiroki Sato 				in6_ifattach(ifp, NULL);
1754154d5f73SHiroki Sato 			} else if (!(ND.flags & ND6_IFF_IFDISABLED) &&
1755154d5f73SHiroki Sato 			    ifp->if_flags & IFF_UP) {
175677bc4985SHiroki Sato 				/*
175777bc4985SHiroki Sato 				 * When the IF already has
1758154d5f73SHiroki Sato 				 * ND6_IFF_AUTO_LINKLOCAL, no link-local
1759154d5f73SHiroki Sato 				 * address is assigned, and IFF_UP, try to
1760154d5f73SHiroki Sato 				 * assign one.
176177bc4985SHiroki Sato 				 */
1762ef2e580eSGleb Smirnoff 				NET_EPOCH_ENTER(et);
1763d7c5a620SMatt Macy 				CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead,
1764d0bec2c5SHiroki Sato 				    ifa_link) {
1765d0bec2c5SHiroki Sato 					if (ifa->ifa_addr->sa_family !=
1766d0bec2c5SHiroki Sato 					    AF_INET6)
176777bc4985SHiroki Sato 						continue;
176877bc4985SHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
1769d0bec2c5SHiroki Sato 					if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
177077bc4985SHiroki Sato 						break;
177177bc4985SHiroki Sato 				}
1772ef2e580eSGleb Smirnoff 				NET_EPOCH_EXIT(et);
1773d0bec2c5SHiroki Sato 				if (ifa != NULL)
1774d0bec2c5SHiroki Sato 					/* No LLA is configured. */
177577bc4985SHiroki Sato 					in6_ifattach(ifp, NULL);
1776a283298cSHiroki Sato 			}
1777a283298cSHiroki Sato 		}
17782ce62dceSSUZUKI Shinsuke 		ND_IFINFO(ifp)->flags = ND.flags;
1779686cdd19SJun-ichiro itojun Hagino 		break;
1780b8a6e03fSGleb Smirnoff 	}
17812ce62dceSSUZUKI Shinsuke #undef ND
1782686cdd19SJun-ichiro itojun Hagino 	case SIOCSNDFLUSH_IN6:	/* XXX: the ioctl name is confusing... */
1783743eee66SSUZUKI Shinsuke 		/* sync kernel routing table with the default router list */
1784743eee66SSUZUKI Shinsuke 		defrouter_reset();
1785686cdd19SJun-ichiro itojun Hagino 		defrouter_select();
178682cd038dSYoshinobu Inoue 		break;
178782cd038dSYoshinobu Inoue 	case SIOCSPFXFLUSH_IN6:
178882cd038dSYoshinobu Inoue 	{
178982cd038dSYoshinobu Inoue 		/* flush all the prefix advertised by routers */
179033841545SHajimu UMEMOTO 		struct in6_ifaddr *ia, *ia_next;
1791d748f7efSMark Johnston 		struct nd_prefix *pr, *next;
1792d748f7efSMark Johnston 		struct nd_prhead prl;
179333841545SHajimu UMEMOTO 
1794d748f7efSMark Johnston 		LIST_INIT(&prl);
1795d748f7efSMark Johnston 
1796d748f7efSMark Johnston 		ND6_WLOCK();
1797d748f7efSMark Johnston 		LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) {
179833841545SHajimu UMEMOTO 			if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
179933841545SHajimu UMEMOTO 				continue; /* XXX */
1800d748f7efSMark Johnston 			nd6_prefix_unlink(pr, &prl);
1801d748f7efSMark Johnston 		}
1802d748f7efSMark Johnston 		ND6_WUNLOCK();
180333841545SHajimu UMEMOTO 
1804d748f7efSMark Johnston 		while ((pr = LIST_FIRST(&prl)) != NULL) {
1805d748f7efSMark Johnston 			LIST_REMOVE(pr, ndpr_entry);
1806d1da0a06SRobert Watson 			/* XXXRW: in6_ifaddrhead locking. */
1807d7c5a620SMatt Macy 			CK_STAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link,
180880af0152SRobert Watson 			    ia_next) {
180933841545SHajimu UMEMOTO 				if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
181033841545SHajimu UMEMOTO 					continue;
181133841545SHajimu UMEMOTO 
181233841545SHajimu UMEMOTO 				if (ia->ia6_ndpr == pr)
181333841545SHajimu UMEMOTO 					in6_purgeaddr(&ia->ia_ifa);
181433841545SHajimu UMEMOTO 			}
1815d748f7efSMark Johnston 			nd6_prefix_del(pr);
181682cd038dSYoshinobu Inoue 		}
181782cd038dSYoshinobu Inoue 		break;
181882cd038dSYoshinobu Inoue 	}
181982cd038dSYoshinobu Inoue 	case SIOCSRTRFLUSH_IN6:
182082cd038dSYoshinobu Inoue 	{
182182cd038dSYoshinobu Inoue 		/* flush all the default routers */
18224de485feSMark Johnston 		struct nd_drhead drq;
18234de485feSMark Johnston 		struct nd_defrouter *dr;
18244de485feSMark Johnston 
18254de485feSMark Johnston 		TAILQ_INIT(&drq);
182682cd038dSYoshinobu Inoue 
1827743eee66SSUZUKI Shinsuke 		defrouter_reset();
18284de485feSMark Johnston 
18294de485feSMark Johnston 		ND6_WLOCK();
18304de485feSMark Johnston 		while ((dr = TAILQ_FIRST(&V_nd_defrouter)) != NULL)
18314de485feSMark Johnston 			defrouter_unlink(dr, &drq);
18324de485feSMark Johnston 		ND6_WUNLOCK();
18334de485feSMark Johnston 		while ((dr = TAILQ_FIRST(&drq)) != NULL) {
18344de485feSMark Johnston 			TAILQ_REMOVE(&drq, dr, dr_entry);
18354de485feSMark Johnston 			defrouter_del(dr);
183682cd038dSYoshinobu Inoue 		}
18374de485feSMark Johnston 
1838743eee66SSUZUKI Shinsuke 		defrouter_select();
183982cd038dSYoshinobu Inoue 		break;
184082cd038dSYoshinobu Inoue 	}
184182cd038dSYoshinobu Inoue 	case SIOCGNBRINFO_IN6:
184282cd038dSYoshinobu Inoue 	{
18436e6b3f7cSQing Li 		struct llentry *ln;
184482cd038dSYoshinobu Inoue 		struct in6_addr nb_addr = nbi->addr; /* make local for safety */
184582cd038dSYoshinobu Inoue 
1846a1f7e5f8SHajimu UMEMOTO 		if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0)
1847a1f7e5f8SHajimu UMEMOTO 			return (error);
184882cd038dSYoshinobu Inoue 
1849a68cc388SGleb Smirnoff 		NET_EPOCH_ENTER(et);
18506e6b3f7cSQing Li 		ln = nd6_lookup(&nb_addr, 0, ifp);
1851a68cc388SGleb Smirnoff 		NET_EPOCH_EXIT(et);
18526e6b3f7cSQing Li 
18536e6b3f7cSQing Li 		if (ln == NULL) {
185482cd038dSYoshinobu Inoue 			error = EINVAL;
185582cd038dSYoshinobu Inoue 			break;
185682cd038dSYoshinobu Inoue 		}
185782cd038dSYoshinobu Inoue 		nbi->state = ln->ln_state;
18586e6b3f7cSQing Li 		nbi->asked = ln->la_asked;
185982cd038dSYoshinobu Inoue 		nbi->isrouter = ln->ln_router;
18605a041915SHiroki Sato 		if (ln->la_expire == 0)
18615a041915SHiroki Sato 			nbi->expire = 0;
18625a041915SHiroki Sato 		else
1863427c2f4eSAlexander V. Chernikov 			nbi->expire = ln->la_expire + ln->lle_remtime / hz +
18645a041915SHiroki Sato 			    (time_second - time_uptime);
18656e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
186682cd038dSYoshinobu Inoue 		break;
186782cd038dSYoshinobu Inoue 	}
1868686cdd19SJun-ichiro itojun Hagino 	case SIOCGDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1869603724d3SBjoern A. Zeeb 		ndif->ifindex = V_nd6_defifindex;
1870686cdd19SJun-ichiro itojun Hagino 		break;
1871686cdd19SJun-ichiro itojun Hagino 	case SIOCSDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1872686cdd19SJun-ichiro itojun Hagino 		return (nd6_setdefaultiface(ndif->ifindex));
187382cd038dSYoshinobu Inoue 	}
187482cd038dSYoshinobu Inoue 	return (error);
187582cd038dSYoshinobu Inoue }
187682cd038dSYoshinobu Inoue 
187782cd038dSYoshinobu Inoue /*
18780e2dcee6SAlexander V. Chernikov  * Calculates new isRouter value based on provided parameters and
18790e2dcee6SAlexander V. Chernikov  * returns it.
18800e2dcee6SAlexander V. Chernikov  */
18810e2dcee6SAlexander V. Chernikov static int
18820e2dcee6SAlexander V. Chernikov nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr,
18830e2dcee6SAlexander V. Chernikov     int ln_router)
18840e2dcee6SAlexander V. Chernikov {
18850e2dcee6SAlexander V. Chernikov 
18860e2dcee6SAlexander V. Chernikov 	/*
18870e2dcee6SAlexander V. Chernikov 	 * ICMP6 type dependent behavior.
18880e2dcee6SAlexander V. Chernikov 	 *
18890e2dcee6SAlexander V. Chernikov 	 * NS: clear IsRouter if new entry
18900e2dcee6SAlexander V. Chernikov 	 * RS: clear IsRouter
18910e2dcee6SAlexander V. Chernikov 	 * RA: set IsRouter if there's lladdr
18920e2dcee6SAlexander V. Chernikov 	 * redir: clear IsRouter if new entry
18930e2dcee6SAlexander V. Chernikov 	 *
18940e2dcee6SAlexander V. Chernikov 	 * RA case, (1):
18950e2dcee6SAlexander V. Chernikov 	 * The spec says that we must set IsRouter in the following cases:
18960e2dcee6SAlexander V. Chernikov 	 * - If lladdr exist, set IsRouter.  This means (1-5).
18970e2dcee6SAlexander V. Chernikov 	 * - If it is old entry (!newentry), set IsRouter.  This means (7).
18980e2dcee6SAlexander V. Chernikov 	 * So, based on the spec, in (1-5) and (7) cases we must set IsRouter.
18990e2dcee6SAlexander V. Chernikov 	 * A quetion arises for (1) case.  (1) case has no lladdr in the
19000e2dcee6SAlexander V. Chernikov 	 * neighbor cache, this is similar to (6).
19010e2dcee6SAlexander V. Chernikov 	 * This case is rare but we figured that we MUST NOT set IsRouter.
19020e2dcee6SAlexander V. Chernikov 	 *
190341a31e78SAlexander V. Chernikov 	 *   is_new  old_addr new_addr 	    NS  RS  RA	redir
19040e2dcee6SAlexander V. Chernikov 	 *							D R
190541a31e78SAlexander V. Chernikov 	 *	0	n	n	(1)	c   ?     s
190641a31e78SAlexander V. Chernikov 	 *	0	y	n	(2)	c   s     s
190741a31e78SAlexander V. Chernikov 	 *	0	n	y	(3)	c   s     s
190841a31e78SAlexander V. Chernikov 	 *	0	y	y	(4)	c   s     s
190941a31e78SAlexander V. Chernikov 	 *	0	y	y	(5)	c   s     s
191041a31e78SAlexander V. Chernikov 	 *	1	--	n	(6) c	c	c s
191141a31e78SAlexander V. Chernikov 	 *	1	--	y	(7) c	c   s	c s
19120e2dcee6SAlexander V. Chernikov 	 *
19130e2dcee6SAlexander V. Chernikov 	 *					(c=clear s=set)
19140e2dcee6SAlexander V. Chernikov 	 */
19150e2dcee6SAlexander V. Chernikov 	switch (type & 0xff) {
19160e2dcee6SAlexander V. Chernikov 	case ND_NEIGHBOR_SOLICIT:
19170e2dcee6SAlexander V. Chernikov 		/*
19180e2dcee6SAlexander V. Chernikov 		 * New entry must have is_router flag cleared.
19190e2dcee6SAlexander V. Chernikov 		 */
19200e2dcee6SAlexander V. Chernikov 		if (is_new)					/* (6-7) */
19210e2dcee6SAlexander V. Chernikov 			ln_router = 0;
19220e2dcee6SAlexander V. Chernikov 		break;
19230e2dcee6SAlexander V. Chernikov 	case ND_REDIRECT:
19240e2dcee6SAlexander V. Chernikov 		/*
19250e2dcee6SAlexander V. Chernikov 		 * If the icmp is a redirect to a better router, always set the
19260e2dcee6SAlexander V. Chernikov 		 * is_router flag.  Otherwise, if the entry is newly created,
19270e2dcee6SAlexander V. Chernikov 		 * clear the flag.  [RFC 2461, sec 8.3]
19280e2dcee6SAlexander V. Chernikov 		 */
19290e2dcee6SAlexander V. Chernikov 		if (code == ND_REDIRECT_ROUTER)
19300e2dcee6SAlexander V. Chernikov 			ln_router = 1;
19310e2dcee6SAlexander V. Chernikov 		else {
19320e2dcee6SAlexander V. Chernikov 			if (is_new)				/* (6-7) */
19330e2dcee6SAlexander V. Chernikov 				ln_router = 0;
19340e2dcee6SAlexander V. Chernikov 		}
19350e2dcee6SAlexander V. Chernikov 		break;
19360e2dcee6SAlexander V. Chernikov 	case ND_ROUTER_SOLICIT:
19370e2dcee6SAlexander V. Chernikov 		/*
19380e2dcee6SAlexander V. Chernikov 		 * is_router flag must always be cleared.
19390e2dcee6SAlexander V. Chernikov 		 */
19400e2dcee6SAlexander V. Chernikov 		ln_router = 0;
19410e2dcee6SAlexander V. Chernikov 		break;
19420e2dcee6SAlexander V. Chernikov 	case ND_ROUTER_ADVERT:
19430e2dcee6SAlexander V. Chernikov 		/*
19440e2dcee6SAlexander V. Chernikov 		 * Mark an entry with lladdr as a router.
19450e2dcee6SAlexander V. Chernikov 		 */
19460e2dcee6SAlexander V. Chernikov 		if ((!is_new && (old_addr || new_addr)) ||	/* (2-5) */
19470e2dcee6SAlexander V. Chernikov 		    (is_new && new_addr)) {			/* (7) */
19480e2dcee6SAlexander V. Chernikov 			ln_router = 1;
19490e2dcee6SAlexander V. Chernikov 		}
19500e2dcee6SAlexander V. Chernikov 		break;
19510e2dcee6SAlexander V. Chernikov 	}
19520e2dcee6SAlexander V. Chernikov 
19530e2dcee6SAlexander V. Chernikov 	return (ln_router);
19540e2dcee6SAlexander V. Chernikov }
19550e2dcee6SAlexander V. Chernikov 
19560e2dcee6SAlexander V. Chernikov /*
195782cd038dSYoshinobu Inoue  * Create neighbor cache entry and cache link-layer address,
195882cd038dSYoshinobu Inoue  * on reception of inbound ND6 packets.  (RS/RA/NS/redirect)
19591272577eSXin LI  *
19601272577eSXin LI  * type - ICMP6 type
19611272577eSXin LI  * code - type dependent information
19626e6b3f7cSQing Li  *
196382cd038dSYoshinobu Inoue  */
19640e2dcee6SAlexander V. Chernikov void
19651272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr,
19661272577eSXin LI     int lladdrlen, int type, int code)
196782cd038dSYoshinobu Inoue {
19685a255516SAlexander V. Chernikov 	struct llentry *ln = NULL, *ln_tmp;
196982cd038dSYoshinobu Inoue 	int is_newentry;
197082cd038dSYoshinobu Inoue 	int do_update;
197182cd038dSYoshinobu Inoue 	int olladdr;
197282cd038dSYoshinobu Inoue 	int llchange;
197368352503SBjoern A. Zeeb 	int flags;
19743d3728e9SQing Li 	uint16_t router = 0;
19756e6b3f7cSQing Li 	struct sockaddr_in6 sin6;
1976fd14c50bSKip Macy 	struct mbuf *chain = NULL;
19774fb3a820SAlexander V. Chernikov 	u_char linkhdr[LLE_MAX_LINKHDR];
19784fb3a820SAlexander V. Chernikov 	size_t linkhdrsize;
19794fb3a820SAlexander V. Chernikov 	int lladdr_off;
19806e6b3f7cSQing Li 
1981b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
19826e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
198382cd038dSYoshinobu Inoue 
198439e19560SBjoern A. Zeeb 	KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__));
198539e19560SBjoern A. Zeeb 	KASSERT(from != NULL, ("%s: from == NULL", __func__));
198682cd038dSYoshinobu Inoue 
198782cd038dSYoshinobu Inoue 	/* nothing must be updated for unspecified address */
198882cd038dSYoshinobu Inoue 	if (IN6_IS_ADDR_UNSPECIFIED(from))
19890e2dcee6SAlexander V. Chernikov 		return;
199082cd038dSYoshinobu Inoue 
199182cd038dSYoshinobu Inoue 	/*
199282cd038dSYoshinobu Inoue 	 * Validation about ifp->if_addrlen and lladdrlen must be done in
199382cd038dSYoshinobu Inoue 	 * the caller.
199482cd038dSYoshinobu Inoue 	 *
199582cd038dSYoshinobu Inoue 	 * XXX If the link does not have link-layer adderss, what should
199682cd038dSYoshinobu Inoue 	 * we do? (ifp->if_addrlen == 0)
199782cd038dSYoshinobu Inoue 	 * Spec says nothing in sections for RA, RS and NA.  There's small
199882cd038dSYoshinobu Inoue 	 * description on it in NS section (RFC 2461 7.2.3).
199982cd038dSYoshinobu Inoue 	 */
2000f506d933SAlexander V. Chernikov 	flags = lladdr ? LLE_EXCLUSIVE : 0;
20016e6b3f7cSQing Li 	ln = nd6_lookup(from, flags, ifp);
20025a255516SAlexander V. Chernikov 	is_newentry = 0;
20036e6b3f7cSQing Li 	if (ln == NULL) {
2004f506d933SAlexander V. Chernikov 		flags |= LLE_EXCLUSIVE;
20055a255516SAlexander V. Chernikov 		ln = nd6_alloc(from, 0, ifp);
20065a255516SAlexander V. Chernikov 		if (ln == NULL)
20070e2dcee6SAlexander V. Chernikov 			return;
2008501adf01SAlexander V. Chernikov 
2009501adf01SAlexander V. Chernikov 		/*
2010501adf01SAlexander V. Chernikov 		 * Since we already know all the data for the new entry,
2011501adf01SAlexander V. Chernikov 		 * fill it before insertion.
2012501adf01SAlexander V. Chernikov 		 */
20134fb3a820SAlexander V. Chernikov 		if (lladdr != NULL) {
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 			lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
20194fb3a820SAlexander V. Chernikov 			    lladdr_off);
20204fb3a820SAlexander V. Chernikov 		}
20214fb3a820SAlexander V. Chernikov 
20225a255516SAlexander V. Chernikov 		IF_AFDATA_WLOCK(ifp);
20235a255516SAlexander V. Chernikov 		LLE_WLOCK(ln);
20245a255516SAlexander V. Chernikov 		/* Prefer any existing lle over newly-created one */
2025f506d933SAlexander V. Chernikov 		ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp);
20265a255516SAlexander V. Chernikov 		if (ln_tmp == NULL)
20275a255516SAlexander V. Chernikov 			lltable_link_entry(LLTABLE6(ifp), ln);
20285a255516SAlexander V. Chernikov 		IF_AFDATA_WUNLOCK(ifp);
20291496229aSAlexander V. Chernikov 		if (ln_tmp == NULL) {
2030ab415c83SAlexander V. Chernikov 			/* No existing lle, mark as new entry (6,7) */
203182cd038dSYoshinobu Inoue 			is_newentry = 1;
2032f8116f39SEric van Gyzen 			if (lladdr != NULL) {	/* (7) */
2033aa5f023eSAlexander V. Chernikov 				nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
2034ab415c83SAlexander V. Chernikov 				EVENTHANDLER_INVOKE(lle_event, ln,
2035ab415c83SAlexander V. Chernikov 				    LLENTRY_RESOLVED);
2036f8116f39SEric van Gyzen 			}
20371496229aSAlexander V. Chernikov 		} else {
20385a255516SAlexander V. Chernikov 			lltable_free_entry(LLTABLE6(ifp), ln);
20395a255516SAlexander V. Chernikov 			ln = ln_tmp;
20405a255516SAlexander V. Chernikov 			ln_tmp = NULL;
20415a255516SAlexander V. Chernikov 		}
20425a255516SAlexander V. Chernikov 	}
204333841545SHajimu UMEMOTO 	/* do nothing if static ndp is set */
20445a255516SAlexander V. Chernikov 	if ((ln->la_flags & LLE_STATIC)) {
2045f506d933SAlexander V. Chernikov 		if (flags & LLE_EXCLUSIVE)
20460e2dcee6SAlexander V. Chernikov 			LLE_WUNLOCK(ln);
20470e2dcee6SAlexander V. Chernikov 		else
20480e2dcee6SAlexander V. Chernikov 			LLE_RUNLOCK(ln);
20490e2dcee6SAlexander V. Chernikov 		return;
20503d3728e9SQing Li 	}
205182cd038dSYoshinobu Inoue 
20526e6b3f7cSQing Li 	olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0;
205382cd038dSYoshinobu Inoue 	if (olladdr && lladdr) {
20544fb3a820SAlexander V. Chernikov 		llchange = bcmp(lladdr, ln->ll_addr,
20556e6b3f7cSQing Li 		    ifp->if_addrlen);
205641a31e78SAlexander V. Chernikov 	} else if (!olladdr && lladdr)
205741a31e78SAlexander V. Chernikov 		llchange = 1;
205841a31e78SAlexander V. Chernikov 	else
205982cd038dSYoshinobu Inoue 		llchange = 0;
206082cd038dSYoshinobu Inoue 
206182cd038dSYoshinobu Inoue 	/*
206282cd038dSYoshinobu Inoue 	 * newentry olladdr  lladdr  llchange	(*=record)
206382cd038dSYoshinobu Inoue 	 *	0	n	n	--	(1)
206482cd038dSYoshinobu Inoue 	 *	0	y	n	--	(2)
206541a31e78SAlexander V. Chernikov 	 *	0	n	y	y	(3) * STALE
206682cd038dSYoshinobu Inoue 	 *	0	y	y	n	(4) *
206782cd038dSYoshinobu Inoue 	 *	0	y	y	y	(5) * STALE
206882cd038dSYoshinobu Inoue 	 *	1	--	n	--	(6)   NOSTATE(= PASSIVE)
206982cd038dSYoshinobu Inoue 	 *	1	--	y	--	(7) * STALE
207082cd038dSYoshinobu Inoue 	 */
207182cd038dSYoshinobu Inoue 
2072501adf01SAlexander V. Chernikov 	do_update = 0;
20737503e0c7SAlexander V. Chernikov 	if (is_newentry == 0 && llchange != 0) {
2074501adf01SAlexander V. Chernikov 		do_update = 1;	/* (3,5) */
2075501adf01SAlexander V. Chernikov 
207682cd038dSYoshinobu Inoue 		/*
207782cd038dSYoshinobu Inoue 		 * Record source link-layer address
207882cd038dSYoshinobu Inoue 		 * XXX is it dependent to ifp->if_type?
207982cd038dSYoshinobu Inoue 		 */
20804fb3a820SAlexander V. Chernikov 		linkhdrsize = sizeof(linkhdr);
20814fb3a820SAlexander V. Chernikov 		if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
20824fb3a820SAlexander V. Chernikov 		    linkhdr, &linkhdrsize, &lladdr_off) != 0)
20834fb3a820SAlexander V. Chernikov 			return;
20844fb3a820SAlexander V. Chernikov 
20854fb3a820SAlexander V. Chernikov 		if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
20864fb3a820SAlexander V. Chernikov 		    lladdr_off) == 0) {
208712cb7521SAlexander V. Chernikov 			/* Entry was deleted */
208812cb7521SAlexander V. Chernikov 			return;
208912cb7521SAlexander V. Chernikov 		}
209012cb7521SAlexander V. Chernikov 
2091aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
209282cd038dSYoshinobu Inoue 
2093501adf01SAlexander V. Chernikov 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
209482cd038dSYoshinobu Inoue 
2095d7968c29SAlexander V. Chernikov 		if (ln->la_hold != NULL)
2096d7968c29SAlexander V. Chernikov 			nd6_grab_holdchain(ln, &chain, &sin6);
209782cd038dSYoshinobu Inoue 	}
209882cd038dSYoshinobu Inoue 
20990e2dcee6SAlexander V. Chernikov 	/* Calculates new router status */
21000e2dcee6SAlexander V. Chernikov 	router = nd6_is_router(type, code, is_newentry, olladdr,
21010e2dcee6SAlexander V. Chernikov 	    lladdr != NULL ? 1 : 0, ln->ln_router);
210282cd038dSYoshinobu Inoue 
21030e2dcee6SAlexander V. Chernikov 	ln->ln_router = router;
21040e2dcee6SAlexander V. Chernikov 	/* Mark non-router redirects with special flag */
21050e2dcee6SAlexander V. Chernikov 	if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER)
21060e2dcee6SAlexander V. Chernikov 		ln->la_flags |= LLE_REDIRECT;
2107c2b3a02bSKip Macy 
2108f506d933SAlexander V. Chernikov 	if (flags & LLE_EXCLUSIVE)
21096e6b3f7cSQing Li 		LLE_WUNLOCK(ln);
21106e6b3f7cSQing Li 	else
21116e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
21120e2dcee6SAlexander V. Chernikov 
2113d7968c29SAlexander V. Chernikov 	if (chain != NULL)
2114151ba793SAlexander Kabaev 		nd6_flush_holdchain(ifp, chain, &sin6);
21156e6b3f7cSQing Li 
2116554bf4aaSHajimu UMEMOTO 	/*
2117554bf4aaSHajimu UMEMOTO 	 * When the link-layer address of a router changes, select the
2118554bf4aaSHajimu UMEMOTO 	 * best router again.  In particular, when the neighbor entry is newly
2119554bf4aaSHajimu UMEMOTO 	 * created, it might affect the selection policy.
2120554bf4aaSHajimu UMEMOTO 	 * Question: can we restrict the first condition to the "is_newentry"
2121554bf4aaSHajimu UMEMOTO 	 * case?
2122554bf4aaSHajimu UMEMOTO 	 * XXX: when we hear an RA from a new router with the link-layer
2123559b4296SAlan Somers 	 * address option, defrouter_select_fib() is called twice, since
2124554bf4aaSHajimu UMEMOTO 	 * defrtrlist_update called the function as well.  However, I believe
2125554bf4aaSHajimu UMEMOTO 	 * we can compromise the overhead, since it only happens the first
2126554bf4aaSHajimu UMEMOTO 	 * time.
2127559b4296SAlan Somers 	 * XXX: although defrouter_select_fib() should not have a bad effect
2128554bf4aaSHajimu UMEMOTO 	 * for those are not autoconfigured hosts, we explicitly avoid such
2129554bf4aaSHajimu UMEMOTO 	 * cases for safety.
2130554bf4aaSHajimu UMEMOTO 	 */
2131501adf01SAlexander V. Chernikov 	if ((do_update || is_newentry) && router &&
2132a283298cSHiroki Sato 	    ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
21336e6b3f7cSQing Li 		/*
21346e6b3f7cSQing Li 		 * guaranteed recursion
21356e6b3f7cSQing Li 		 */
2136559b4296SAlan Somers 		defrouter_select_fib(ifp->if_fib);
21376e6b3f7cSQing Li 	}
213882cd038dSYoshinobu Inoue }
213982cd038dSYoshinobu Inoue 
214082cd038dSYoshinobu Inoue static void
21418b615593SMarko Zec nd6_slowtimo(void *arg)
214282cd038dSYoshinobu Inoue {
2143a68cc388SGleb Smirnoff 	struct epoch_tracker et;
21448b615593SMarko Zec 	CURVNET_SET((struct vnet *) arg);
214533841545SHajimu UMEMOTO 	struct nd_ifinfo *nd6if;
214631b1bfe1SHajimu UMEMOTO 	struct ifnet *ifp;
214782cd038dSYoshinobu Inoue 
2148603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
2149f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
2150a68cc388SGleb Smirnoff 	NET_EPOCH_ENTER(et);
21514f6c66ccSMatt Macy 	CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
21520de0dd9bSHiroki Sato 		if (ifp->if_afdata[AF_INET6] == NULL)
21530de0dd9bSHiroki Sato 			continue;
215431b1bfe1SHajimu UMEMOTO 		nd6if = ND_IFINFO(ifp);
215582cd038dSYoshinobu Inoue 		if (nd6if->basereachable && /* already initialized */
215682cd038dSYoshinobu Inoue 		    (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
215782cd038dSYoshinobu Inoue 			/*
215882cd038dSYoshinobu Inoue 			 * Since reachable time rarely changes by router
215982cd038dSYoshinobu Inoue 			 * advertisements, we SHOULD insure that a new random
216082cd038dSYoshinobu Inoue 			 * value gets recomputed at least once every few hours.
216182cd038dSYoshinobu Inoue 			 * (RFC 2461, 6.3.4)
216282cd038dSYoshinobu Inoue 			 */
2163603724d3SBjoern A. Zeeb 			nd6if->recalctm = V_nd6_recalc_reachtm_interval;
216482cd038dSYoshinobu Inoue 			nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable);
216582cd038dSYoshinobu Inoue 		}
216682cd038dSYoshinobu Inoue 	}
2167a68cc388SGleb Smirnoff 	NET_EPOCH_EXIT(et);
21688b615593SMarko Zec 	CURVNET_RESTORE();
216982cd038dSYoshinobu Inoue }
217082cd038dSYoshinobu Inoue 
2171d7968c29SAlexander V. Chernikov void
2172d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain,
2173d7968c29SAlexander V. Chernikov     struct sockaddr_in6 *sin6)
2174d7968c29SAlexander V. Chernikov {
2175d7968c29SAlexander V. Chernikov 
2176d7968c29SAlexander V. Chernikov 	LLE_WLOCK_ASSERT(ln);
2177d7968c29SAlexander V. Chernikov 
2178d7968c29SAlexander V. Chernikov 	*chain = ln->la_hold;
2179d7968c29SAlexander V. Chernikov 	ln->la_hold = NULL;
2180314294deSAlexander V. Chernikov 	lltable_fill_sa_entry(ln, (struct sockaddr *)sin6);
2181d7968c29SAlexander V. Chernikov 
2182d7968c29SAlexander V. Chernikov 	if (ln->ln_state == ND6_LLINFO_STALE) {
2183d7968c29SAlexander V. Chernikov 
2184d7968c29SAlexander V. Chernikov 		/*
2185d7968c29SAlexander V. Chernikov 		 * The first time we send a packet to a
2186d7968c29SAlexander V. Chernikov 		 * neighbor whose entry is STALE, we have
2187d7968c29SAlexander V. Chernikov 		 * to change the state to DELAY and a sets
2188d7968c29SAlexander V. Chernikov 		 * a timer to expire in DELAY_FIRST_PROBE_TIME
2189d7968c29SAlexander V. Chernikov 		 * seconds to ensure do neighbor unreachability
2190d7968c29SAlexander V. Chernikov 		 * detection on expiration.
2191d7968c29SAlexander V. Chernikov 		 * (RFC 2461 7.3.3)
2192d7968c29SAlexander V. Chernikov 		 */
2193aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY);
2194d7968c29SAlexander V. Chernikov 	}
2195d7968c29SAlexander V. Chernikov }
2196d7968c29SAlexander V. Chernikov 
21971fe201c3SAlexander V. Chernikov int
2198d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m,
2199637670e7SAlexander V. Chernikov     struct sockaddr_in6 *dst, struct route *ro)
2200d7968c29SAlexander V. Chernikov {
2201d7968c29SAlexander V. Chernikov 	int error;
2202d7968c29SAlexander V. Chernikov 	int ip6len;
2203d7968c29SAlexander V. Chernikov 	struct ip6_hdr *ip6;
2204d7968c29SAlexander V. Chernikov 	struct m_tag *mtag;
2205d7968c29SAlexander V. Chernikov 
2206d7968c29SAlexander V. Chernikov #ifdef MAC
2207d7968c29SAlexander V. Chernikov 	mac_netinet6_nd6_send(ifp, m);
2208d7968c29SAlexander V. Chernikov #endif
2209d7968c29SAlexander V. Chernikov 
2210d7968c29SAlexander V. Chernikov 	/*
2211d7968c29SAlexander V. Chernikov 	 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
2212d7968c29SAlexander V. Chernikov 	 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
2213d7968c29SAlexander V. Chernikov 	 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
2214d7968c29SAlexander V. Chernikov 	 * to be diverted to user space.  When re-injected into the kernel,
2215d7968c29SAlexander V. Chernikov 	 * send_output() will directly dispatch them to the outgoing interface.
2216d7968c29SAlexander V. Chernikov 	 */
2217d7968c29SAlexander V. Chernikov 	if (send_sendso_input_hook != NULL) {
2218d7968c29SAlexander V. Chernikov 		mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
2219d7968c29SAlexander V. Chernikov 		if (mtag != NULL) {
2220d7968c29SAlexander V. Chernikov 			ip6 = mtod(m, struct ip6_hdr *);
2221d7968c29SAlexander V. Chernikov 			ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
2222d7968c29SAlexander V. Chernikov 			/* Use the SEND socket */
2223d7968c29SAlexander V. Chernikov 			error = send_sendso_input_hook(m, ifp, SND_OUT,
2224d7968c29SAlexander V. Chernikov 			    ip6len);
2225d7968c29SAlexander V. Chernikov 			/* -1 == no app on SEND socket */
2226d7968c29SAlexander V. Chernikov 			if (error == 0 || error != -1)
2227d7968c29SAlexander V. Chernikov 			    return (error);
2228d7968c29SAlexander V. Chernikov 		}
2229d7968c29SAlexander V. Chernikov 	}
2230d7968c29SAlexander V. Chernikov 
2231d7968c29SAlexander V. Chernikov 	m_clrprotoflags(m);	/* Avoid confusing lower layers. */
2232d7968c29SAlexander V. Chernikov 	IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
2233d7968c29SAlexander V. Chernikov 	    mtod(m, struct ip6_hdr *));
2234d7968c29SAlexander V. Chernikov 
2235d7968c29SAlexander V. Chernikov 	if ((ifp->if_flags & IFF_LOOPBACK) == 0)
2236d7968c29SAlexander V. Chernikov 		origifp = ifp;
2237d7968c29SAlexander V. Chernikov 
2238637670e7SAlexander V. Chernikov 	error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro);
2239d7968c29SAlexander V. Chernikov 	return (error);
2240d7968c29SAlexander V. Chernikov }
2241d7968c29SAlexander V. Chernikov 
2242f6990c4eSAlexander V. Chernikov /*
22434fb3a820SAlexander V. Chernikov  * Lookup link headerfor @sa_dst address. Stores found
22444fb3a820SAlexander V. Chernikov  * data in @desten buffer. Copy of lle ln_flags can be also
22451fe201c3SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
22461fe201c3SAlexander V. Chernikov  *
22471fe201c3SAlexander V. Chernikov  * If destination LLE does not exists or lle state modification
22481fe201c3SAlexander V. Chernikov  * is required, call "slow" version.
22491fe201c3SAlexander V. Chernikov  *
22501fe201c3SAlexander V. Chernikov  * Return values:
22511fe201c3SAlexander V. Chernikov  * - 0 on success (address copied to buffer).
22521fe201c3SAlexander V. Chernikov  * - EWOULDBLOCK (no local error, but address is still unresolved)
22531fe201c3SAlexander V. Chernikov  * - other errors (alloc failure, etc)
2254f6990c4eSAlexander V. Chernikov  */
225582cd038dSYoshinobu Inoue int
22561fe201c3SAlexander V. Chernikov nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
22576d768226SGeorge V. Neville-Neil     const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags,
22586d768226SGeorge V. Neville-Neil     struct llentry **plle)
225982cd038dSYoshinobu Inoue {
2260f6990c4eSAlexander V. Chernikov 	struct llentry *ln = NULL;
22611fe201c3SAlexander V. Chernikov 	const struct sockaddr_in6 *dst6;
22621fe201c3SAlexander V. Chernikov 
2263b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
2264b8a6e03fSGleb Smirnoff 
22651fe201c3SAlexander V. Chernikov 	if (pflags != NULL)
22661fe201c3SAlexander V. Chernikov 		*pflags = 0;
22671fe201c3SAlexander V. Chernikov 
22681fe201c3SAlexander V. Chernikov 	dst6 = (const struct sockaddr_in6 *)sa_dst;
22696e6b3f7cSQing Li 
2270f6990c4eSAlexander V. Chernikov 	/* discard the packet if IPv6 operation is disabled on the interface */
2271f6990c4eSAlexander V. Chernikov 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
2272f6990c4eSAlexander V. Chernikov 		m_freem(m);
2273f6990c4eSAlexander V. Chernikov 		return (ENETDOWN); /* better error? */
2274f6990c4eSAlexander V. Chernikov 	}
2275f6990c4eSAlexander V. Chernikov 
22761fe201c3SAlexander V. Chernikov 	if (m != NULL && m->m_flags & M_MCAST) {
22771fe201c3SAlexander V. Chernikov 		switch (ifp->if_type) {
22781fe201c3SAlexander V. Chernikov 		case IFT_ETHER:
22791fe201c3SAlexander V. Chernikov 		case IFT_L2VLAN:
22801fe201c3SAlexander V. Chernikov 		case IFT_BRIDGE:
22811fe201c3SAlexander V. Chernikov 			ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr,
22821fe201c3SAlexander V. Chernikov 						 desten);
22831fe201c3SAlexander V. Chernikov 			return (0);
22841fe201c3SAlexander V. Chernikov 		default:
22851fe201c3SAlexander V. Chernikov 			m_freem(m);
22861fe201c3SAlexander V. Chernikov 			return (EAFNOSUPPORT);
22871fe201c3SAlexander V. Chernikov 		}
22881fe201c3SAlexander V. Chernikov 	}
2289f6990c4eSAlexander V. Chernikov 
2290ea17754cSMike Karels 	ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED,
2291ea17754cSMike Karels 	    ifp);
229212cb7521SAlexander V. Chernikov 	if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) {
229312cb7521SAlexander V. Chernikov 		/* Entry found, let's copy lle info */
22944fb3a820SAlexander V. Chernikov 		bcopy(ln->r_linkdata, desten, ln->r_hdrlen);
22951fe201c3SAlexander V. Chernikov 		if (pflags != NULL)
229612cb7521SAlexander V. Chernikov 			*pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR);
229712cb7521SAlexander V. Chernikov 		/* Check if we have feedback request from nd6 timer */
229812cb7521SAlexander V. Chernikov 		if (ln->r_skip_req != 0) {
229912cb7521SAlexander V. Chernikov 			LLE_REQ_LOCK(ln);
230012cb7521SAlexander V. Chernikov 			ln->r_skip_req = 0; /* Notify that entry was used */
230112cb7521SAlexander V. Chernikov 			ln->lle_hittime = time_uptime;
230212cb7521SAlexander V. Chernikov 			LLE_REQ_UNLOCK(ln);
230312cb7521SAlexander V. Chernikov 		}
2304ea17754cSMike Karels 		if (plle) {
2305ea17754cSMike Karels 			LLE_ADDREF(ln);
2306ea17754cSMike Karels 			*plle = ln;
2307ea17754cSMike Karels 			LLE_WUNLOCK(ln);
2308ea17754cSMike Karels 		}
23091fe201c3SAlexander V. Chernikov 		return (0);
2310ea17754cSMike Karels 	} else if (plle && ln)
2311ea17754cSMike Karels 		LLE_WUNLOCK(ln);
231212cb7521SAlexander V. Chernikov 
23136d768226SGeorge V. Neville-Neil 	return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle));
231412cb7521SAlexander V. Chernikov }
23156e6b3f7cSQing Li 
23166e6b3f7cSQing Li 
23176e6b3f7cSQing Li /*
23181fe201c3SAlexander V. Chernikov  * Do L2 address resolution for @sa_dst address. Stores found
23191fe201c3SAlexander V. Chernikov  * address in @desten buffer. Copy of lle ln_flags can be also
23201fe201c3SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
23216e6b3f7cSQing Li  *
23221fe201c3SAlexander V. Chernikov  * Heavy version.
23231fe201c3SAlexander V. Chernikov  * Function assume that destination LLE does not exist,
2324f506d933SAlexander V. Chernikov  * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired.
2325c0b8aeaeSAlexander V. Chernikov  *
2326c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
23276e6b3f7cSQing Li  */
2328c0b8aeaeSAlexander V. Chernikov static __noinline int
23294fb3a820SAlexander V. Chernikov nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m,
23306d768226SGeorge V. Neville-Neil     const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags,
23316d768226SGeorge V. Neville-Neil     struct llentry **plle)
23326e6b3f7cSQing Li {
23335a255516SAlexander V. Chernikov 	struct llentry *lle = NULL, *lle_tmp;
2334aa5f023eSAlexander V. Chernikov 	struct in6_addr *psrc, src;
23354fb3a820SAlexander V. Chernikov 	int send_ns, ll_len;
23364fb3a820SAlexander V. Chernikov 	char *lladdr;
233782cd038dSYoshinobu Inoue 
2338b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
2339b8a6e03fSGleb Smirnoff 
234082cd038dSYoshinobu Inoue 	/*
234182cd038dSYoshinobu Inoue 	 * Address resolution or Neighbor Unreachability Detection
234282cd038dSYoshinobu Inoue 	 * for the next hop.
234382cd038dSYoshinobu Inoue 	 * At this point, the destination of the packet must be a unicast
234482cd038dSYoshinobu Inoue 	 * or an anycast address(i.e. not a multicast).
234582cd038dSYoshinobu Inoue 	 */
2346f6990c4eSAlexander V. Chernikov 	if (lle == NULL) {
2347f506d933SAlexander V. Chernikov 		lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2348f6990c4eSAlexander V. Chernikov 		if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp))  {
2349686cdd19SJun-ichiro itojun Hagino 			/*
2350686cdd19SJun-ichiro itojun Hagino 			 * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
2351686cdd19SJun-ichiro itojun Hagino 			 * the condition below is not very efficient.  But we believe
2352686cdd19SJun-ichiro itojun Hagino 			 * it is tolerable, because this should be a rare case.
2353686cdd19SJun-ichiro itojun Hagino 			 */
23545a255516SAlexander V. Chernikov 			lle = nd6_alloc(&dst->sin6_addr, 0, ifp);
2355f6990c4eSAlexander V. Chernikov 			if (lle == NULL) {
23561d54aa3bSBjoern A. Zeeb 				char ip6buf[INET6_ADDRSTRLEN];
2357686cdd19SJun-ichiro itojun Hagino 				log(LOG_DEBUG,
2358686cdd19SJun-ichiro itojun Hagino 				    "nd6_output: can't allocate llinfo for %s "
2359bbd8aebaSQing Li 				    "(ln=%p)\n",
2360f6990c4eSAlexander V. Chernikov 				    ip6_sprintf(ip6buf, &dst->sin6_addr), lle);
23619dffa6a3SAlexander V. Chernikov 				m_freem(m);
23629dffa6a3SAlexander V. Chernikov 				return (ENOBUFS);
236382cd038dSYoshinobu Inoue 			}
23645a255516SAlexander V. Chernikov 
23655a255516SAlexander V. Chernikov 			IF_AFDATA_WLOCK(ifp);
23665a255516SAlexander V. Chernikov 			LLE_WLOCK(lle);
23675a255516SAlexander V. Chernikov 			/* Prefer any existing entry over newly-created one */
2368f506d933SAlexander V. Chernikov 			lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
23695a255516SAlexander V. Chernikov 			if (lle_tmp == NULL)
23705a255516SAlexander V. Chernikov 				lltable_link_entry(LLTABLE6(ifp), lle);
23715a255516SAlexander V. Chernikov 			IF_AFDATA_WUNLOCK(ifp);
23725a255516SAlexander V. Chernikov 			if (lle_tmp != NULL) {
23735a255516SAlexander V. Chernikov 				lltable_free_entry(LLTABLE6(ifp), lle);
23745a255516SAlexander V. Chernikov 				lle = lle_tmp;
23755a255516SAlexander V. Chernikov 				lle_tmp = NULL;
23765a255516SAlexander V. Chernikov 			}
23775a255516SAlexander V. Chernikov 		}
23785a255516SAlexander V. Chernikov 	}
23795a255516SAlexander V. Chernikov 	if (lle == NULL) {
23801fe201c3SAlexander V. Chernikov 		if (!(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) {
23815a255516SAlexander V. Chernikov 			m_freem(m);
23825a255516SAlexander V. Chernikov 			return (ENOBUFS);
23835a255516SAlexander V. Chernikov 		}
23841fe201c3SAlexander V. Chernikov 
23851fe201c3SAlexander V. Chernikov 		if (m != NULL)
23861fe201c3SAlexander V. Chernikov 			m_freem(m);
23871fe201c3SAlexander V. Chernikov 		return (ENOBUFS);
2388686cdd19SJun-ichiro itojun Hagino 	}
2389686cdd19SJun-ichiro itojun Hagino 
2390f6990c4eSAlexander V. Chernikov 	LLE_WLOCK_ASSERT(lle);
2391f6990c4eSAlexander V. Chernikov 
239282cd038dSYoshinobu Inoue 	/*
239382cd038dSYoshinobu Inoue 	 * The first time we send a packet to a neighbor whose entry is
239482cd038dSYoshinobu Inoue 	 * STALE, we have to change the state to DELAY and a sets a timer to
239582cd038dSYoshinobu Inoue 	 * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do
239682cd038dSYoshinobu Inoue 	 * neighbor unreachability detection on expiration.
239782cd038dSYoshinobu Inoue 	 * (RFC 2461 7.3.3)
239882cd038dSYoshinobu Inoue 	 */
2399aa5f023eSAlexander V. Chernikov 	if (lle->ln_state == ND6_LLINFO_STALE)
2400aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY);
240182cd038dSYoshinobu Inoue 
240282cd038dSYoshinobu Inoue 	/*
240382cd038dSYoshinobu Inoue 	 * If the neighbor cache entry has a state other than INCOMPLETE
240488ff5695SSUZUKI Shinsuke 	 * (i.e. its link-layer address is already resolved), just
240582cd038dSYoshinobu Inoue 	 * send the packet.
240682cd038dSYoshinobu Inoue 	 */
24071fe201c3SAlexander V. Chernikov 	if (lle->ln_state > ND6_LLINFO_INCOMPLETE) {
24084fb3a820SAlexander V. Chernikov 		if (flags & LLE_ADDRONLY) {
24094fb3a820SAlexander V. Chernikov 			lladdr = lle->ll_addr;
24104fb3a820SAlexander V. Chernikov 			ll_len = ifp->if_addrlen;
24114fb3a820SAlexander V. Chernikov 		} else {
24124fb3a820SAlexander V. Chernikov 			lladdr = lle->r_linkdata;
24134fb3a820SAlexander V. Chernikov 			ll_len = lle->r_hdrlen;
24144fb3a820SAlexander V. Chernikov 		}
24154fb3a820SAlexander V. Chernikov 		bcopy(lladdr, desten, ll_len);
24161fe201c3SAlexander V. Chernikov 		if (pflags != NULL)
24171fe201c3SAlexander V. Chernikov 			*pflags = lle->la_flags;
24186d768226SGeorge V. Neville-Neil 		if (plle) {
24196d768226SGeorge V. Neville-Neil 			LLE_ADDREF(lle);
24206d768226SGeorge V. Neville-Neil 			*plle = lle;
24216d768226SGeorge V. Neville-Neil 		}
24221fe201c3SAlexander V. Chernikov 		LLE_WUNLOCK(lle);
24231fe201c3SAlexander V. Chernikov 		return (0);
24241fe201c3SAlexander V. Chernikov 	}
242582cd038dSYoshinobu Inoue 
242682cd038dSYoshinobu Inoue 	/*
242782cd038dSYoshinobu Inoue 	 * There is a neighbor cache entry, but no ethernet address
2428743eee66SSUZUKI Shinsuke 	 * response yet.  Append this latest packet to the end of the
2429b0ab3725SLuiz Otavio O Souza 	 * packet queue in the mbuf.  When it exceeds nd6_maxqueuelen,
2430743eee66SSUZUKI Shinsuke 	 * the oldest packet in the queue will be removed.
243182cd038dSYoshinobu Inoue 	 */
24326e6b3f7cSQing Li 
2433f6990c4eSAlexander V. Chernikov 	if (lle->la_hold != NULL) {
2434743eee66SSUZUKI Shinsuke 		struct mbuf *m_hold;
2435743eee66SSUZUKI Shinsuke 		int i;
2436743eee66SSUZUKI Shinsuke 
2437743eee66SSUZUKI Shinsuke 		i = 0;
2438f6990c4eSAlexander V. Chernikov 		for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){
2439743eee66SSUZUKI Shinsuke 			i++;
2440743eee66SSUZUKI Shinsuke 			if (m_hold->m_nextpkt == NULL) {
2441743eee66SSUZUKI Shinsuke 				m_hold->m_nextpkt = m;
2442743eee66SSUZUKI Shinsuke 				break;
244382cd038dSYoshinobu Inoue 			}
244482cd038dSYoshinobu Inoue 		}
2445603724d3SBjoern A. Zeeb 		while (i >= V_nd6_maxqueuelen) {
2446f6990c4eSAlexander V. Chernikov 			m_hold = lle->la_hold;
2447f6990c4eSAlexander V. Chernikov 			lle->la_hold = lle->la_hold->m_nextpkt;
244831d4137bSSUZUKI Shinsuke 			m_freem(m_hold);
2449743eee66SSUZUKI Shinsuke 			i--;
2450743eee66SSUZUKI Shinsuke 		}
2451743eee66SSUZUKI Shinsuke 	} else {
2452f6990c4eSAlexander V. Chernikov 		lle->la_hold = m;
24536e6b3f7cSQing Li 	}
2454743eee66SSUZUKI Shinsuke 
2455743eee66SSUZUKI Shinsuke 	/*
2456743eee66SSUZUKI Shinsuke 	 * If there has been no NS for the neighbor after entering the
2457743eee66SSUZUKI Shinsuke 	 * INCOMPLETE state, send the first solicitation.
2458aa5f023eSAlexander V. Chernikov 	 * Note that for newly-created lle la_asked will be 0,
2459aa5f023eSAlexander V. Chernikov 	 * so we will transition from ND6_LLINFO_NOSTATE to
2460aa5f023eSAlexander V. Chernikov 	 * ND6_LLINFO_INCOMPLETE state here.
2461743eee66SSUZUKI Shinsuke 	 */
2462aa5f023eSAlexander V. Chernikov 	psrc = NULL;
2463aa5f023eSAlexander V. Chernikov 	send_ns = 0;
2464aa5f023eSAlexander V. Chernikov 	if (lle->la_asked == 0) {
2465f6990c4eSAlexander V. Chernikov 		lle->la_asked++;
2466aa5f023eSAlexander V. Chernikov 		send_ns = 1;
246726deb882SAlexander V. Chernikov 		psrc = nd6_llinfo_get_holdsrc(lle, &src);
2468aa5f023eSAlexander V. Chernikov 
2469aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE);
2470743eee66SSUZUKI Shinsuke 	}
2471aa5f023eSAlexander V. Chernikov 	LLE_WUNLOCK(lle);
2472aa5f023eSAlexander V. Chernikov 	if (send_ns != 0)
2473aa5f023eSAlexander V. Chernikov 		nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL);
2474e6950476SBjoern A. Zeeb 
24751fe201c3SAlexander V. Chernikov 	return (EWOULDBLOCK);
247682cd038dSYoshinobu Inoue }
247782cd038dSYoshinobu Inoue 
24784fb3a820SAlexander V. Chernikov /*
24794fb3a820SAlexander V. Chernikov  * Do L2 address resolution for @sa_dst address. Stores found
24804fb3a820SAlexander V. Chernikov  * address in @desten buffer. Copy of lle ln_flags can be also
24814fb3a820SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
24824fb3a820SAlexander V. Chernikov  *
24834fb3a820SAlexander V. Chernikov  * Return values:
24844fb3a820SAlexander V. Chernikov  * - 0 on success (address copied to buffer).
24854fb3a820SAlexander V. Chernikov  * - EWOULDBLOCK (no local error, but address is still unresolved)
24864fb3a820SAlexander V. Chernikov  * - other errors (alloc failure, etc)
24874fb3a820SAlexander V. Chernikov  */
24884fb3a820SAlexander V. Chernikov int
24894fb3a820SAlexander V. Chernikov nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
24904fb3a820SAlexander V. Chernikov     char *desten, uint32_t *pflags)
24914fb3a820SAlexander V. Chernikov {
24924fb3a820SAlexander V. Chernikov 	int error;
24934fb3a820SAlexander V. Chernikov 
24944fb3a820SAlexander V. Chernikov 	flags |= LLE_ADDRONLY;
24954fb3a820SAlexander V. Chernikov 	error = nd6_resolve_slow(ifp, flags, NULL,
24966d768226SGeorge V. Neville-Neil 	    (const struct sockaddr_in6 *)dst, desten, pflags, NULL);
24974fb3a820SAlexander V. Chernikov 	return (error);
24984fb3a820SAlexander V. Chernikov }
24996e6b3f7cSQing Li 
25006e6b3f7cSQing Li int
2501151ba793SAlexander Kabaev nd6_flush_holdchain(struct ifnet *ifp, struct mbuf *chain,
25029c9bde01SAlexander V. Chernikov     struct sockaddr_in6 *dst)
25036e6b3f7cSQing Li {
25046e6b3f7cSQing Li 	struct mbuf *m, *m_head;
25056e6b3f7cSQing Li 	int error = 0;
25066e6b3f7cSQing Li 
25076e6b3f7cSQing Li 	m_head = chain;
25086e6b3f7cSQing Li 
25096e6b3f7cSQing Li 	while (m_head) {
25106e6b3f7cSQing Li 		m = m_head;
25116e6b3f7cSQing Li 		m_head = m_head->m_nextpkt;
2512151ba793SAlexander Kabaev 		error = nd6_output_ifp(ifp, ifp, m, dst, NULL);
25136e6b3f7cSQing Li 	}
25146e6b3f7cSQing Li 
25156e6b3f7cSQing Li 	/*
25166e6b3f7cSQing Li 	 * XXX
25171fe201c3SAlexander V. Chernikov 	 * note that intermediate errors are blindly ignored
25186e6b3f7cSQing Li 	 */
25196e6b3f7cSQing Li 	return (error);
25206e6b3f7cSQing Li }
25216e6b3f7cSQing Li 
25221fe201c3SAlexander V. Chernikov static int
25231272577eSXin LI nd6_need_cache(struct ifnet *ifp)
252433841545SHajimu UMEMOTO {
252533841545SHajimu UMEMOTO 	/*
252633841545SHajimu UMEMOTO 	 * XXX: we currently do not make neighbor cache on any interface
25273a4fc8a8SBrooks Davis 	 * other than Ethernet and GIF.
252833841545SHajimu UMEMOTO 	 *
252933841545SHajimu UMEMOTO 	 * RFC2893 says:
253033841545SHajimu UMEMOTO 	 * - unidirectional tunnels needs no ND
253133841545SHajimu UMEMOTO 	 */
253233841545SHajimu UMEMOTO 	switch (ifp->if_type) {
253333841545SHajimu UMEMOTO 	case IFT_ETHER:
253433841545SHajimu UMEMOTO 	case IFT_IEEE1394:
253505b6760dSMunechika SUMIKAWA 	case IFT_L2VLAN:
2536e4cd31ddSJeff Roberson 	case IFT_INFINIBAND:
253759280079SAndrew Thompson 	case IFT_BRIDGE:
2538c57086ceSHajimu UMEMOTO 	case IFT_PROPVIRTUAL:
253933841545SHajimu UMEMOTO 		return (1);
254033841545SHajimu UMEMOTO 	default:
254133841545SHajimu UMEMOTO 		return (0);
254233841545SHajimu UMEMOTO 	}
254333841545SHajimu UMEMOTO }
254433841545SHajimu UMEMOTO 
25456e6b3f7cSQing Li /*
2546f6b84910SAlexander V. Chernikov  * Add pernament ND6 link-layer record for given
2547f6b84910SAlexander V. Chernikov  * interface address.
2548f6b84910SAlexander V. Chernikov  *
2549f6b84910SAlexander V. Chernikov  * Very similar to IPv4 arp_ifinit(), but:
2550f6b84910SAlexander V. Chernikov  * 1) IPv6 DAD is performed in different place
2551f6b84910SAlexander V. Chernikov  * 2) It is called by IPv6 protocol stack in contrast to
2552f6b84910SAlexander V. Chernikov  * arp_ifinit() which is typically called in SIOCSIFADDR
2553f6b84910SAlexander V. Chernikov  * driver ioctl handler.
2554f6b84910SAlexander V. Chernikov  *
2555f6b84910SAlexander V. Chernikov  */
2556f6b84910SAlexander V. Chernikov int
2557f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia)
2558f6b84910SAlexander V. Chernikov {
2559f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
25605a255516SAlexander V. Chernikov 	struct llentry *ln, *ln_tmp;
25615a255516SAlexander V. Chernikov 	struct sockaddr *dst;
2562f6b84910SAlexander V. Chernikov 
2563f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2564af6209a1SAndrey V. Elsukov 	if (nd6_need_cache(ifp) == 0)
2565af6209a1SAndrey V. Elsukov 		return (0);
25665a255516SAlexander V. Chernikov 
2567f6b84910SAlexander V. Chernikov 	ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
25685a255516SAlexander V. Chernikov 	dst = (struct sockaddr *)&ia->ia_addr;
25695a255516SAlexander V. Chernikov 	ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst);
25705a255516SAlexander V. Chernikov 	if (ln == NULL)
25715a255516SAlexander V. Chernikov 		return (ENOBUFS);
25725a255516SAlexander V. Chernikov 
25735a255516SAlexander V. Chernikov 	IF_AFDATA_WLOCK(ifp);
25745a255516SAlexander V. Chernikov 	LLE_WLOCK(ln);
25755a255516SAlexander V. Chernikov 	/* Unlink any entry if exists */
25765a255516SAlexander V. Chernikov 	ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst);
25775a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25785a255516SAlexander V. Chernikov 		lltable_unlink_entry(LLTABLE6(ifp), ln_tmp);
25795a255516SAlexander V. Chernikov 	lltable_link_entry(LLTABLE6(ifp), ln);
25805a255516SAlexander V. Chernikov 	IF_AFDATA_WUNLOCK(ifp);
25815a255516SAlexander V. Chernikov 
25825a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25835a255516SAlexander V. Chernikov 		EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED);
25845a255516SAlexander V. Chernikov 	EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
25855a255516SAlexander V. Chernikov 
25865a255516SAlexander V. Chernikov 	LLE_WUNLOCK(ln);
25875a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25885a255516SAlexander V. Chernikov 		llentry_free(ln_tmp);
25895a255516SAlexander V. Chernikov 
25905a255516SAlexander V. Chernikov 	return (0);
2591f6b84910SAlexander V. Chernikov }
2592f6b84910SAlexander V. Chernikov 
2593f6b84910SAlexander V. Chernikov /*
25943e7a2321SAlexander V. Chernikov  * Removes either all lle entries for given @ia, or lle
25953e7a2321SAlexander V. Chernikov  * corresponding to @ia address.
2596f6b84910SAlexander V. Chernikov  */
2597f6b84910SAlexander V. Chernikov void
25983e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all)
2599f6b84910SAlexander V. Chernikov {
2600f6b84910SAlexander V. Chernikov 	struct sockaddr_in6 mask, addr;
26013e7a2321SAlexander V. Chernikov 	struct sockaddr *saddr, *smask;
2602f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
2603f6b84910SAlexander V. Chernikov 
2604f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2605f6b84910SAlexander V. Chernikov 	memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
2606f6b84910SAlexander V. Chernikov 	memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
26073e7a2321SAlexander V. Chernikov 	saddr = (struct sockaddr *)&addr;
26083e7a2321SAlexander V. Chernikov 	smask = (struct sockaddr *)&mask;
26093e7a2321SAlexander V. Chernikov 
26103e7a2321SAlexander V. Chernikov 	if (all != 0)
26113e7a2321SAlexander V. Chernikov 		lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC);
26123e7a2321SAlexander V. Chernikov 	else
26133e7a2321SAlexander V. Chernikov 		lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr);
2614f6b84910SAlexander V. Chernikov }
2615f6b84910SAlexander V. Chernikov 
261631d4137bSSUZUKI Shinsuke static void
26176e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln)
261831d4137bSSUZUKI Shinsuke {
261931d4137bSSUZUKI Shinsuke 	struct mbuf *m_hold, *m_hold_next;
262031d4137bSSUZUKI Shinsuke 
26216e6b3f7cSQing Li 	for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) {
262231d4137bSSUZUKI Shinsuke 		m_hold_next = m_hold->m_nextpkt;
262331d4137bSSUZUKI Shinsuke 		m_freem(m_hold);
262431d4137bSSUZUKI Shinsuke 	}
262531d4137bSSUZUKI Shinsuke 
26266e6b3f7cSQing Li 	ln->la_hold = NULL;
262731d4137bSSUZUKI Shinsuke }
262831d4137bSSUZUKI Shinsuke 
262933841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS);
263033841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS);
263165fdf521SMark Johnston 
263233841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6);
263365fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
263465fdf521SMark Johnston 	CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
263565fdf521SMark Johnston 	NULL, 0, nd6_sysctl_drlist, "S,in6_defrouter",
263665fdf521SMark Johnston 	"NDP default router list");
263765fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
263865fdf521SMark Johnston 	CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
263965fdf521SMark Johnston 	NULL, 0, nd6_sysctl_prlist, "S,in6_prefix",
264065fdf521SMark Johnston 	"NDP prefix list");
26416df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
2642d6e82913SSteven Hartland 	CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
26436df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer,
2644d6e82913SSteven Hartland 	CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), "");
264533841545SHajimu UMEMOTO 
264633841545SHajimu UMEMOTO static int
264733841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS)
264833841545SHajimu UMEMOTO {
26497195094cSMarius Strobl 	struct in6_defrouter d;
265033841545SHajimu UMEMOTO 	struct nd_defrouter *dr;
26517195094cSMarius Strobl 	int error;
265233841545SHajimu UMEMOTO 
26534de485feSMark Johnston 	if (req->newptr != NULL)
26547195094cSMarius Strobl 		return (EPERM);
265533841545SHajimu UMEMOTO 
26564de485feSMark Johnston 	error = sysctl_wire_old_buffer(req, 0);
26574de485feSMark Johnston 	if (error != 0)
26584de485feSMark Johnston 		return (error);
26594de485feSMark Johnston 
26607195094cSMarius Strobl 	bzero(&d, sizeof(d));
26617195094cSMarius Strobl 	d.rtaddr.sin6_family = AF_INET6;
26627195094cSMarius Strobl 	d.rtaddr.sin6_len = sizeof(d.rtaddr);
26637195094cSMarius Strobl 
26644de485feSMark Johnston 	ND6_RLOCK();
26653b0b2840SJohn Baldwin 	TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) {
26667195094cSMarius Strobl 		d.rtaddr.sin6_addr = dr->rtaddr;
26677195094cSMarius Strobl 		error = sa6_recoverscope(&d.rtaddr);
2668edbb8b46SPeter Wemm 		if (error != 0)
26694de485feSMark Johnston 			break;
267001869be5SMark Johnston 		d.flags = dr->raflags;
26717195094cSMarius Strobl 		d.rtlifetime = dr->rtlifetime;
2672ffa0165aSHiroki Sato 		d.expire = dr->expire + (time_second - time_uptime);
26737195094cSMarius Strobl 		d.if_index = dr->ifp->if_index;
26747195094cSMarius Strobl 		error = SYSCTL_OUT(req, &d, sizeof(d));
26757195094cSMarius Strobl 		if (error != 0)
26764de485feSMark Johnston 			break;
267733841545SHajimu UMEMOTO 	}
26784de485feSMark Johnston 	ND6_RUNLOCK();
26794de485feSMark Johnston 	return (error);
26807195094cSMarius Strobl }
268133841545SHajimu UMEMOTO 
268233841545SHajimu UMEMOTO static int
268333841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS)
268433841545SHajimu UMEMOTO {
26857195094cSMarius Strobl 	struct in6_prefix p;
26867195094cSMarius Strobl 	struct sockaddr_in6 s6;
268733841545SHajimu UMEMOTO 	struct nd_prefix *pr;
26887195094cSMarius Strobl 	struct nd_pfxrouter *pfr;
26897195094cSMarius Strobl 	time_t maxexpire;
26907195094cSMarius Strobl 	int error;
26911d54aa3bSBjoern A. Zeeb 	char ip6buf[INET6_ADDRSTRLEN];
269233841545SHajimu UMEMOTO 
269333841545SHajimu UMEMOTO 	if (req->newptr)
26947195094cSMarius Strobl 		return (EPERM);
269533841545SHajimu UMEMOTO 
2696cc51be7bSMark Johnston 	error = sysctl_wire_old_buffer(req, 0);
2697cc51be7bSMark Johnston 	if (error != 0)
2698cc51be7bSMark Johnston 		return (error);
2699cc51be7bSMark Johnston 
27007195094cSMarius Strobl 	bzero(&p, sizeof(p));
27017195094cSMarius Strobl 	p.origin = PR_ORIG_RA;
27027195094cSMarius Strobl 	bzero(&s6, sizeof(s6));
27037195094cSMarius Strobl 	s6.sin6_family = AF_INET6;
27047195094cSMarius Strobl 	s6.sin6_len = sizeof(s6);
27057195094cSMarius Strobl 
2706cc51be7bSMark Johnston 	ND6_RLOCK();
27073b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
27087195094cSMarius Strobl 		p.prefix = pr->ndpr_prefix;
27097195094cSMarius Strobl 		if (sa6_recoverscope(&p.prefix)) {
27107195094cSMarius Strobl 			log(LOG_ERR, "scope error in prefix list (%s)\n",
27117195094cSMarius Strobl 			    ip6_sprintf(ip6buf, &p.prefix.sin6_addr));
2712a1f7e5f8SHajimu UMEMOTO 			/* XXX: press on... */
2713a1f7e5f8SHajimu UMEMOTO 		}
27147195094cSMarius Strobl 		p.raflags = pr->ndpr_raf;
27157195094cSMarius Strobl 		p.prefixlen = pr->ndpr_plen;
27167195094cSMarius Strobl 		p.vltime = pr->ndpr_vltime;
27177195094cSMarius Strobl 		p.pltime = pr->ndpr_pltime;
27187195094cSMarius Strobl 		p.if_index = pr->ndpr_ifp->if_index;
2719743eee66SSUZUKI Shinsuke 		if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
27207195094cSMarius Strobl 			p.expire = 0;
2721743eee66SSUZUKI Shinsuke 		else {
2722743eee66SSUZUKI Shinsuke 			/* XXX: we assume time_t is signed. */
2723743eee66SSUZUKI Shinsuke 			maxexpire = (-1) &
27247195094cSMarius Strobl 			    ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
27257195094cSMarius Strobl 			if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate)
27267195094cSMarius Strobl 				p.expire = pr->ndpr_lastupdate +
2727ffa0165aSHiroki Sato 				    pr->ndpr_vltime +
2728ffa0165aSHiroki Sato 				    (time_second - time_uptime);
27297195094cSMarius Strobl 			else
27307195094cSMarius Strobl 				p.expire = maxexpire;
2731743eee66SSUZUKI Shinsuke 		}
27320bbf244eSMark Johnston 		p.refcnt = pr->ndpr_addrcnt;
27337195094cSMarius Strobl 		p.flags = pr->ndpr_stateflags;
27347195094cSMarius Strobl 		p.advrtrs = 0;
27357195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry)
27367195094cSMarius Strobl 			p.advrtrs++;
27377195094cSMarius Strobl 		error = SYSCTL_OUT(req, &p, sizeof(p));
27387195094cSMarius Strobl 		if (error != 0)
2739cc51be7bSMark Johnston 			break;
27407195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
27417195094cSMarius Strobl 			s6.sin6_addr = pfr->router->rtaddr;
27427195094cSMarius Strobl 			if (sa6_recoverscope(&s6))
27437195094cSMarius Strobl 				log(LOG_ERR,
27447195094cSMarius Strobl 				    "scope error in prefix list (%s)\n",
27457195094cSMarius Strobl 				    ip6_sprintf(ip6buf, &pfr->router->rtaddr));
27467195094cSMarius Strobl 			error = SYSCTL_OUT(req, &s6, sizeof(s6));
27477195094cSMarius Strobl 			if (error != 0)
2748d748f7efSMark Johnston 				goto out;
2749cc51be7bSMark Johnston 		}
2750cc51be7bSMark Johnston 	}
2751d748f7efSMark Johnston out:
2752cc51be7bSMark Johnston 	ND6_RUNLOCK();
27537195094cSMarius Strobl 	return (error);
27547195094cSMarius Strobl }
2755