xref: /freebsd/sys/netinet6/nd6.c (revision 2bbab0af6dd5aa825fbe86813d917565bb885b67)
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>
65e7d8af4fSAlexander V. Chernikov #include <net/route/route_var.h>
66539642a2SAlexander V. Chernikov #include <net/route/nhop.h>
674b79449eSBjoern A. Zeeb #include <net/vnet.h>
6882cd038dSYoshinobu Inoue 
6982cd038dSYoshinobu Inoue #include <netinet/in.h>
7057f60867SMark Johnston #include <netinet/in_kdtrace.h>
716e6b3f7cSQing Li #include <net/if_llatbl.h>
7282cd038dSYoshinobu Inoue #include <netinet/if_ether.h>
7382cd038dSYoshinobu Inoue #include <netinet6/in6_var.h>
74686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h>
7582cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h>
76a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h>
7782cd038dSYoshinobu Inoue #include <netinet6/nd6.h>
78a283298cSHiroki Sato #include <netinet6/in6_ifattach.h>
79686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h>
801db8d1f8SAna Kukec #include <netinet6/send.h>
8182cd038dSYoshinobu Inoue 
82743eee66SSUZUKI Shinsuke #include <sys/limits.h>
83743eee66SSUZUKI Shinsuke 
84aed55708SRobert Watson #include <security/mac/mac_framework.h>
85aed55708SRobert Watson 
8682cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */
8782cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */
8882cd038dSYoshinobu Inoue 
8947e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s))
9082cd038dSYoshinobu Inoue 
915e0a6f31SMark Johnston MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
925e0a6f31SMark Johnston 
9382cea7e6SBjoern A. Zeeb /* timer values */
9482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune)	= 1;	/* walk list every 1 seconds */
9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay)	= 5;	/* delay first probe time 5 second */
9682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries)	= 3;	/* maximum unicast query */
9782cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries)	= 3;	/* maximum multicast query */
9882cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1;	/* use loopback interface for
9982cea7e6SBjoern A. Zeeb 					 * local traffic */
10082cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer)	= (60 * 60 * 24); /* 1 day: garbage
10182cea7e6SBjoern A. Zeeb 					 * collection timer */
102686cdd19SJun-ichiro itojun Hagino 
103686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */
1045f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nd6_maxndopt) = 10; /* max # of ND options allowed */
10582cea7e6SBjoern A. Zeeb 
10682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0;	/* max # of subsequent upper
10782cea7e6SBjoern A. Zeeb 					 * layer hints */
1085f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
10982cea7e6SBjoern A. Zeeb 					 * ND entries */
1101e77c105SRobert Watson #define	V_nd6_maxndopt			VNET(nd6_maxndopt)
1111e77c105SRobert Watson #define	V_nd6_maxqueuelen		VNET(nd6_maxqueuelen)
112686cdd19SJun-ichiro itojun Hagino 
11382cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG
11482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1;
11582cea7e6SBjoern A. Zeeb #else
11682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0;
11782cea7e6SBjoern A. Zeeb #endif
11833841545SHajimu UMEMOTO 
11930b45077SBjoern A. Zeeb static eventhandler_tag lle_event_eh, iflladdr_event_eh, ifnet_link_event_eh;
12030aee131SAndrey V. Elsukov 
121eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix);
1224de485feSMark Johnston VNET_DEFINE(struct rwlock, nd6_lock);
123d748f7efSMark Johnston VNET_DEFINE(uint64_t, nd6_list_genid);
124d748f7efSMark Johnston VNET_DEFINE(struct mtx, nd6_onlink_mtx);
12582cd038dSYoshinobu Inoue 
12682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL;
1271e77c105SRobert Watson #define	V_nd6_recalc_reachtm_interval	VNET(nd6_recalc_reachtm_interval)
12844e33a07SMarko Zec 
1291db8d1f8SAna Kukec int	(*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
1301db8d1f8SAna Kukec 
131f0316e1aSAlexander V. Chernikov static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *,
1326f56329aSXin LI 	struct ifnet *);
1339233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *);
1349233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *);
1359233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *);
136435bece4SMark Johnston static void nd6_free(struct llentry **, int);
13717a03656SEric van Gyzen static void nd6_free_redirect(const struct llentry *);
1389233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *);
1399b420b3dSAlexander V. Chernikov static void nd6_llinfo_settimer_locked(struct llentry *, long);
1406e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *);
14174787ef4SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct nhop_object *,
14274787ef4SAlexander V. Chernikov     struct rt_addrinfo *);
1434fb3a820SAlexander V. Chernikov static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *,
1446d768226SGeorge V. Neville-Neil     const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **);
1451fe201c3SAlexander V. Chernikov static int nd6_need_cache(struct ifnet *);
1461fe201c3SAlexander V. Chernikov 
14733841545SHajimu UMEMOTO 
1485f901c92SAndrew Turner VNET_DEFINE_STATIC(struct callout, nd6_slowtimo_ch);
1491e77c105SRobert Watson #define	V_nd6_slowtimo_ch		VNET(nd6_slowtimo_ch)
150eddfbb76SRobert Watson 
1516db65273SBjoern A. Zeeb VNET_DEFINE_STATIC(struct callout, nd6_timer_ch);
1529901091eSBjoern A. Zeeb #define	V_nd6_timer_ch			VNET(nd6_timer_ch)
153eddfbb76SRobert Watson 
1543c5018caSBjoern A. Zeeb SYSCTL_DECL(_net_inet6_icmp6);
1553c5018caSBjoern A. Zeeb 
15630aee131SAndrey V. Elsukov static void
15730aee131SAndrey V. Elsukov nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
15830aee131SAndrey V. Elsukov {
15930aee131SAndrey V. Elsukov 	struct rt_addrinfo rtinfo;
160314294deSAlexander V. Chernikov 	struct sockaddr_in6 dst;
16130aee131SAndrey V. Elsukov 	struct sockaddr_dl gw;
16230aee131SAndrey V. Elsukov 	struct ifnet *ifp;
16330aee131SAndrey V. Elsukov 	int type;
164559b4296SAlan Somers 	int fibnum;
16530aee131SAndrey V. Elsukov 
16630aee131SAndrey V. Elsukov 	LLE_WLOCK_ASSERT(lle);
16730aee131SAndrey V. Elsukov 
168314294deSAlexander V. Chernikov 	if (lltable_get_af(lle->lle_tbl) != AF_INET6)
169314294deSAlexander V. Chernikov 		return;
170314294deSAlexander V. Chernikov 
17130aee131SAndrey V. Elsukov 	switch (evt) {
17230aee131SAndrey V. Elsukov 	case LLENTRY_RESOLVED:
17330aee131SAndrey V. Elsukov 		type = RTM_ADD;
17430aee131SAndrey V. Elsukov 		KASSERT(lle->la_flags & LLE_VALID,
17530aee131SAndrey V. Elsukov 		    ("%s: %p resolved but not valid?", __func__, lle));
17630aee131SAndrey V. Elsukov 		break;
17730aee131SAndrey V. Elsukov 	case LLENTRY_EXPIRED:
17830aee131SAndrey V. Elsukov 		type = RTM_DELETE;
17930aee131SAndrey V. Elsukov 		break;
18030aee131SAndrey V. Elsukov 	default:
18130aee131SAndrey V. Elsukov 		return;
18230aee131SAndrey V. Elsukov 	}
18330aee131SAndrey V. Elsukov 
184314294deSAlexander V. Chernikov 	ifp = lltable_get_ifp(lle->lle_tbl);
18530aee131SAndrey V. Elsukov 
18630aee131SAndrey V. Elsukov 	bzero(&dst, sizeof(dst));
18730aee131SAndrey V. Elsukov 	bzero(&gw, sizeof(gw));
18830aee131SAndrey V. Elsukov 	bzero(&rtinfo, sizeof(rtinfo));
189314294deSAlexander V. Chernikov 	lltable_fill_sa_entry(lle, (struct sockaddr *)&dst);
19030aee131SAndrey V. Elsukov 	dst.sin6_scope_id = in6_getscopezone(ifp,
191314294deSAlexander V. Chernikov 	    in6_addrscope(&dst.sin6_addr));
19230aee131SAndrey V. Elsukov 	gw.sdl_len = sizeof(struct sockaddr_dl);
19330aee131SAndrey V. Elsukov 	gw.sdl_family = AF_LINK;
19430aee131SAndrey V. Elsukov 	gw.sdl_alen = ifp->if_addrlen;
19530aee131SAndrey V. Elsukov 	gw.sdl_index = ifp->if_index;
19630aee131SAndrey V. Elsukov 	gw.sdl_type = ifp->if_type;
19730aee131SAndrey V. Elsukov 	if (evt == LLENTRY_RESOLVED)
1984fb3a820SAlexander V. Chernikov 		bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen);
19930aee131SAndrey V. Elsukov 	rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst;
20030aee131SAndrey V. Elsukov 	rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw;
20130aee131SAndrey V. Elsukov 	rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY;
202559b4296SAlan Somers 	fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ifp->if_fib;
20330aee131SAndrey V. Elsukov 	rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | (
204559b4296SAlan Somers 	    type == RTM_ADD ? RTF_UP: 0), 0, fibnum);
20530aee131SAndrey V. Elsukov }
20630aee131SAndrey V. Elsukov 
2074fb3a820SAlexander V. Chernikov /*
2084fb3a820SAlexander V. Chernikov  * A handler for interface link layer address change event.
2094fb3a820SAlexander V. Chernikov  */
2104fb3a820SAlexander V. Chernikov static void
2114fb3a820SAlexander V. Chernikov nd6_iflladdr(void *arg __unused, struct ifnet *ifp)
2124fb3a820SAlexander V. Chernikov {
2134fb3a820SAlexander V. Chernikov 
2144fb3a820SAlexander V. Chernikov 	lltable_update_ifaddr(LLTABLE6(ifp));
2154fb3a820SAlexander V. Chernikov }
2164fb3a820SAlexander V. Chernikov 
21782cd038dSYoshinobu Inoue void
2181272577eSXin LI nd6_init(void)
21982cd038dSYoshinobu Inoue {
22082cd038dSYoshinobu Inoue 
221d748f7efSMark Johnston 	mtx_init(&V_nd6_onlink_mtx, "nd6 onlink", NULL, MTX_DEF);
222d748f7efSMark Johnston 	rw_init(&V_nd6_lock, "nd6 list");
2234de485feSMark Johnston 
22444e33a07SMarko Zec 	LIST_INIT(&V_nd_prefix);
225ad675b32SBjoern A. Zeeb 	nd6_defrouter_init();
22682cea7e6SBjoern A. Zeeb 
2279901091eSBjoern A. Zeeb 	/* Start timers. */
228603724d3SBjoern A. Zeeb 	callout_init(&V_nd6_slowtimo_ch, 0);
229603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
230f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
231d6ad6a86SMark Johnston 
2329901091eSBjoern A. Zeeb 	callout_init(&V_nd6_timer_ch, 0);
2339901091eSBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet);
2349901091eSBjoern A. Zeeb 
235d6ad6a86SMark Johnston 	nd6_dad_init();
2364fb3a820SAlexander V. Chernikov 	if (IS_DEFAULT_VNET(curvnet)) {
23730aee131SAndrey V. Elsukov 		lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
23830aee131SAndrey V. Elsukov 		    NULL, EVENTHANDLER_PRI_ANY);
2394fb3a820SAlexander V. Chernikov 		iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event,
2404fb3a820SAlexander V. Chernikov 		    nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
24130b45077SBjoern A. Zeeb 		ifnet_link_event_eh = EVENTHANDLER_REGISTER(ifnet_link_event,
24230b45077SBjoern A. Zeeb 		    nd6_ifnet_link_event, NULL, EVENTHANDLER_PRI_ANY);
2434fb3a820SAlexander V. Chernikov 	}
24482cd038dSYoshinobu Inoue }
24582cd038dSYoshinobu Inoue 
246bc29160dSMarko Zec #ifdef VIMAGE
247bc29160dSMarko Zec void
248bc29160dSMarko Zec nd6_destroy()
249bc29160dSMarko Zec {
250bc29160dSMarko Zec 
251bc29160dSMarko Zec 	callout_drain(&V_nd6_slowtimo_ch);
252bc29160dSMarko Zec 	callout_drain(&V_nd6_timer_ch);
2534fb3a820SAlexander V. Chernikov 	if (IS_DEFAULT_VNET(curvnet)) {
25430b45077SBjoern A. Zeeb 		EVENTHANDLER_DEREGISTER(ifnet_link_event, ifnet_link_event_eh);
25530aee131SAndrey V. Elsukov 		EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
2564fb3a820SAlexander V. Chernikov 		EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh);
2574fb3a820SAlexander V. Chernikov 	}
2584de485feSMark Johnston 	rw_destroy(&V_nd6_lock);
259d748f7efSMark Johnston 	mtx_destroy(&V_nd6_onlink_mtx);
260bc29160dSMarko Zec }
261bc29160dSMarko Zec #endif
262bc29160dSMarko Zec 
26331b1bfe1SHajimu UMEMOTO struct nd_ifinfo *
2641272577eSXin LI nd6_ifattach(struct ifnet *ifp)
26582cd038dSYoshinobu Inoue {
26631b1bfe1SHajimu UMEMOTO 	struct nd_ifinfo *nd;
26782cd038dSYoshinobu Inoue 
268fc315641SMark Johnston 	nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO);
26931b1bfe1SHajimu UMEMOTO 	nd->initialized = 1;
27082cd038dSYoshinobu Inoue 
27131b1bfe1SHajimu UMEMOTO 	nd->chlim = IPV6_DEFHLIM;
27231b1bfe1SHajimu UMEMOTO 	nd->basereachable = REACHABLE_TIME;
27331b1bfe1SHajimu UMEMOTO 	nd->reachable = ND_COMPUTE_RTIME(nd->basereachable);
27431b1bfe1SHajimu UMEMOTO 	nd->retrans = RETRANS_TIMER;
275a283298cSHiroki Sato 
276a283298cSHiroki Sato 	nd->flags = ND6_IFF_PERFORMNUD;
277a283298cSHiroki Sato 
278af805644SHiroki Sato 	/* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL.
279af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by
280af805644SHiroki Sato 	 * default regardless of the V_ip6_auto_linklocal configuration to
281af805644SHiroki Sato 	 * give a reasonable default behavior.
282af805644SHiroki Sato 	 */
283af805644SHiroki Sato 	if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) ||
284af805644SHiroki Sato 	    (ifp->if_flags & IFF_LOOPBACK))
285a283298cSHiroki Sato 		nd->flags |= ND6_IFF_AUTO_LINKLOCAL;
286af805644SHiroki Sato 	/*
287af805644SHiroki Sato 	 * A loopback interface does not need to accept RTADV.
288af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by
289af805644SHiroki Sato 	 * default regardless of the V_ip6_accept_rtadv configuration to
290af805644SHiroki Sato 	 * prevent the interface from accepting RA messages arrived
291af805644SHiroki Sato 	 * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV.
292af805644SHiroki Sato 	 */
293af805644SHiroki Sato 	if (V_ip6_accept_rtadv &&
294af805644SHiroki Sato 	    !(ifp->if_flags & IFF_LOOPBACK) &&
295af805644SHiroki Sato 	    (ifp->if_type != IFT_BRIDGE))
296a283298cSHiroki Sato 			nd->flags |= ND6_IFF_ACCEPT_RTADV;
297e7fa8d0aSHiroki Sato 	if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK))
298e7fa8d0aSHiroki Sato 		nd->flags |= ND6_IFF_NO_RADR;
29931b1bfe1SHajimu UMEMOTO 
30031b1bfe1SHajimu UMEMOTO 	/* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */
30131b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, nd);
30231b1bfe1SHajimu UMEMOTO 
30331b1bfe1SHajimu UMEMOTO 	return nd;
30431b1bfe1SHajimu UMEMOTO }
30531b1bfe1SHajimu UMEMOTO 
30631b1bfe1SHajimu UMEMOTO void
30789856f7eSBjoern A. Zeeb nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd)
30831b1bfe1SHajimu UMEMOTO {
309a68cc388SGleb Smirnoff 	struct epoch_tracker et;
31089856f7eSBjoern A. Zeeb 	struct ifaddr *ifa, *next;
31189856f7eSBjoern A. Zeeb 
312a68cc388SGleb Smirnoff 	NET_EPOCH_ENTER(et);
313d7c5a620SMatt Macy 	CK_STAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
31489856f7eSBjoern A. Zeeb 		if (ifa->ifa_addr->sa_family != AF_INET6)
31589856f7eSBjoern A. Zeeb 			continue;
31689856f7eSBjoern A. Zeeb 
31789856f7eSBjoern A. Zeeb 		/* stop DAD processing */
31889856f7eSBjoern A. Zeeb 		nd6_dad_stop(ifa);
31989856f7eSBjoern A. Zeeb 	}
320a68cc388SGleb Smirnoff 	NET_EPOCH_EXIT(et);
32131b1bfe1SHajimu UMEMOTO 
32231b1bfe1SHajimu UMEMOTO 	free(nd, M_IP6NDP);
32382cd038dSYoshinobu Inoue }
32482cd038dSYoshinobu Inoue 
32582cd038dSYoshinobu Inoue /*
32682cd038dSYoshinobu Inoue  * Reset ND level link MTU. This function is called when the physical MTU
32782cd038dSYoshinobu Inoue  * changes, which means we might have to adjust the ND level MTU.
32882cd038dSYoshinobu Inoue  */
32982cd038dSYoshinobu Inoue void
3301272577eSXin LI nd6_setmtu(struct ifnet *ifp)
33182cd038dSYoshinobu Inoue {
3327e037c12SKristof Provost 	if (ifp->if_afdata[AF_INET6] == NULL)
3337e037c12SKristof Provost 		return;
33431b1bfe1SHajimu UMEMOTO 
33531b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, ND_IFINFO(ifp));
33631b1bfe1SHajimu UMEMOTO }
33731b1bfe1SHajimu UMEMOTO 
33831b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */
33931b1bfe1SHajimu UMEMOTO void
3401272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi)
34131b1bfe1SHajimu UMEMOTO {
34231b3783cSHajimu UMEMOTO 	u_int32_t omaxmtu;
34331b1bfe1SHajimu UMEMOTO 
34431b3783cSHajimu UMEMOTO 	omaxmtu = ndi->maxmtu;
34582cd038dSYoshinobu Inoue 	ndi->maxmtu = ifp->if_mtu;
34682cd038dSYoshinobu Inoue 
34782cd038dSYoshinobu Inoue 	/*
34831b3783cSHajimu UMEMOTO 	 * Decreasing the interface MTU under IPV6 minimum MTU may cause
34931b3783cSHajimu UMEMOTO 	 * undesirable situation.  We thus notify the operator of the change
35031b3783cSHajimu UMEMOTO 	 * explicitly.  The check for omaxmtu is necessary to restrict the
35131b3783cSHajimu UMEMOTO 	 * log to the case of changing the MTU, not initializing it.
35282cd038dSYoshinobu Inoue 	 */
35331b3783cSHajimu UMEMOTO 	if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) {
35431b3783cSHajimu UMEMOTO 		log(LOG_NOTICE, "nd6_setmtu0: "
35531b3783cSHajimu UMEMOTO 		    "new link MTU on %s (%lu) is too small for IPv6\n",
35631b3783cSHajimu UMEMOTO 		    if_name(ifp), (unsigned long)ndi->maxmtu);
35782cd038dSYoshinobu Inoue 	}
35831b3783cSHajimu UMEMOTO 
359603724d3SBjoern A. Zeeb 	if (ndi->maxmtu > V_in6_maxmtu)
36031b3783cSHajimu UMEMOTO 		in6_setmaxmtu(); /* check all interfaces just in case */
36131b3783cSHajimu UMEMOTO 
36282cd038dSYoshinobu Inoue }
36382cd038dSYoshinobu Inoue 
36482cd038dSYoshinobu Inoue void
3651272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts)
36682cd038dSYoshinobu Inoue {
36707eb2995SHajimu UMEMOTO 
36882cd038dSYoshinobu Inoue 	bzero(ndopts, sizeof(*ndopts));
36982cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)opt;
37082cd038dSYoshinobu Inoue 	ndopts->nd_opts_last
37182cd038dSYoshinobu Inoue 		= (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len);
37282cd038dSYoshinobu Inoue 
37382cd038dSYoshinobu Inoue 	if (icmp6len == 0) {
37482cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
37582cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
37682cd038dSYoshinobu Inoue 	}
37782cd038dSYoshinobu Inoue }
37882cd038dSYoshinobu Inoue 
37982cd038dSYoshinobu Inoue /*
38082cd038dSYoshinobu Inoue  * Take one ND option.
38182cd038dSYoshinobu Inoue  */
38282cd038dSYoshinobu Inoue struct nd_opt_hdr *
3831272577eSXin LI nd6_option(union nd_opts *ndopts)
38482cd038dSYoshinobu Inoue {
38582cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
38682cd038dSYoshinobu Inoue 	int olen;
38782cd038dSYoshinobu Inoue 
38839e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
38939e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
39039e19560SBjoern A. Zeeb 	    __func__));
3912ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
39282cd038dSYoshinobu Inoue 		return NULL;
39382cd038dSYoshinobu Inoue 	if (ndopts->nd_opts_done)
39482cd038dSYoshinobu Inoue 		return NULL;
39582cd038dSYoshinobu Inoue 
39682cd038dSYoshinobu Inoue 	nd_opt = ndopts->nd_opts_search;
39782cd038dSYoshinobu Inoue 
39819391949SKris Kennaway 	/* make sure nd_opt_len is inside the buffer */
39919391949SKris Kennaway 	if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
40019391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
40119391949SKris Kennaway 		return NULL;
40219391949SKris Kennaway 	}
40319391949SKris Kennaway 
40482cd038dSYoshinobu Inoue 	olen = nd_opt->nd_opt_len << 3;
40582cd038dSYoshinobu Inoue 	if (olen == 0) {
40682cd038dSYoshinobu Inoue 		/*
40782cd038dSYoshinobu Inoue 		 * Message validation requires that all included
40882cd038dSYoshinobu Inoue 		 * options have a length that is greater than zero.
40982cd038dSYoshinobu Inoue 		 */
41082cd038dSYoshinobu Inoue 		bzero(ndopts, sizeof(*ndopts));
41182cd038dSYoshinobu Inoue 		return NULL;
41282cd038dSYoshinobu Inoue 	}
41382cd038dSYoshinobu Inoue 
41482cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
41519391949SKris Kennaway 	if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
41619391949SKris Kennaway 		/* option overruns the end of buffer, invalid */
41719391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
41819391949SKris Kennaway 		return NULL;
41919391949SKris Kennaway 	} else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
42019391949SKris Kennaway 		/* reached the end of options chain */
42182cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
42282cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
42382cd038dSYoshinobu Inoue 	}
42482cd038dSYoshinobu Inoue 	return nd_opt;
42582cd038dSYoshinobu Inoue }
42682cd038dSYoshinobu Inoue 
42782cd038dSYoshinobu Inoue /*
42882cd038dSYoshinobu Inoue  * Parse multiple ND options.
42982cd038dSYoshinobu Inoue  * This function is much easier to use, for ND routines that do not need
43082cd038dSYoshinobu Inoue  * multiple options of the same type.
43182cd038dSYoshinobu Inoue  */
43282cd038dSYoshinobu Inoue int
4331272577eSXin LI nd6_options(union nd_opts *ndopts)
43482cd038dSYoshinobu Inoue {
43582cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
43682cd038dSYoshinobu Inoue 	int i = 0;
43782cd038dSYoshinobu Inoue 
43839e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
43939e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
44039e19560SBjoern A. Zeeb 	    __func__));
4412ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
44282cd038dSYoshinobu Inoue 		return 0;
44382cd038dSYoshinobu Inoue 
44482cd038dSYoshinobu Inoue 	while (1) {
44582cd038dSYoshinobu Inoue 		nd_opt = nd6_option(ndopts);
4462ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
44782cd038dSYoshinobu Inoue 			/*
44882cd038dSYoshinobu Inoue 			 * Message validation requires that all included
44982cd038dSYoshinobu Inoue 			 * options have a length that is greater than zero.
45082cd038dSYoshinobu Inoue 			 */
451e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_badopt);
45282cd038dSYoshinobu Inoue 			bzero(ndopts, sizeof(*ndopts));
45382cd038dSYoshinobu Inoue 			return -1;
45482cd038dSYoshinobu Inoue 		}
45582cd038dSYoshinobu Inoue 
4562ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL)
45782cd038dSYoshinobu Inoue 			goto skip1;
45882cd038dSYoshinobu Inoue 
45982cd038dSYoshinobu Inoue 		switch (nd_opt->nd_opt_type) {
46082cd038dSYoshinobu Inoue 		case ND_OPT_SOURCE_LINKADDR:
46182cd038dSYoshinobu Inoue 		case ND_OPT_TARGET_LINKADDR:
46282cd038dSYoshinobu Inoue 		case ND_OPT_MTU:
46382cd038dSYoshinobu Inoue 		case ND_OPT_REDIRECTED_HEADER:
46411d8451dSHiroki Sato 		case ND_OPT_NONCE:
46582cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
46633841545SHajimu UMEMOTO 				nd6log((LOG_INFO,
46733841545SHajimu UMEMOTO 				    "duplicated ND6 option found (type=%d)\n",
46833841545SHajimu UMEMOTO 				    nd_opt->nd_opt_type));
46982cd038dSYoshinobu Inoue 				/* XXX bark? */
47082cd038dSYoshinobu Inoue 			} else {
47182cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
47282cd038dSYoshinobu Inoue 					= nd_opt;
47382cd038dSYoshinobu Inoue 			}
47482cd038dSYoshinobu Inoue 			break;
47582cd038dSYoshinobu Inoue 		case ND_OPT_PREFIX_INFORMATION:
47682cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) {
47782cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
47882cd038dSYoshinobu Inoue 					= nd_opt;
47982cd038dSYoshinobu Inoue 			}
48082cd038dSYoshinobu Inoue 			ndopts->nd_opts_pi_end =
48182cd038dSYoshinobu Inoue 				(struct nd_opt_prefix_info *)nd_opt;
48282cd038dSYoshinobu Inoue 			break;
483abbe8356SBjoern A. Zeeb 		/* What about ND_OPT_ROUTE_INFO? RFC 4191 */
484abbe8356SBjoern A. Zeeb 		case ND_OPT_RDNSS:	/* RFC 6106 */
485abbe8356SBjoern A. Zeeb 		case ND_OPT_DNSSL:	/* RFC 6106 */
486abbe8356SBjoern A. Zeeb 			/*
487abbe8356SBjoern A. Zeeb 			 * Silently ignore options we know and do not care about
488abbe8356SBjoern A. Zeeb 			 * in the kernel.
489abbe8356SBjoern A. Zeeb 			 */
490abbe8356SBjoern A. Zeeb 			break;
49182cd038dSYoshinobu Inoue 		default:
49282cd038dSYoshinobu Inoue 			/*
49382cd038dSYoshinobu Inoue 			 * Unknown options must be silently ignored,
494a4641f4eSPedro F. Giffuni 			 * to accommodate future extension to the protocol.
49582cd038dSYoshinobu Inoue 			 */
49633841545SHajimu UMEMOTO 			nd6log((LOG_DEBUG,
49782cd038dSYoshinobu Inoue 			    "nd6_options: unsupported option %d - "
49833841545SHajimu UMEMOTO 			    "option ignored\n", nd_opt->nd_opt_type));
49982cd038dSYoshinobu Inoue 		}
50082cd038dSYoshinobu Inoue 
50182cd038dSYoshinobu Inoue skip1:
50282cd038dSYoshinobu Inoue 		i++;
503603724d3SBjoern A. Zeeb 		if (i > V_nd6_maxndopt) {
504e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_toomanyopt);
50533841545SHajimu UMEMOTO 			nd6log((LOG_INFO, "too many loop in nd opt\n"));
50682cd038dSYoshinobu Inoue 			break;
50782cd038dSYoshinobu Inoue 		}
50882cd038dSYoshinobu Inoue 
50982cd038dSYoshinobu Inoue 		if (ndopts->nd_opts_done)
51082cd038dSYoshinobu Inoue 			break;
51182cd038dSYoshinobu Inoue 	}
51282cd038dSYoshinobu Inoue 
51382cd038dSYoshinobu Inoue 	return 0;
51482cd038dSYoshinobu Inoue }
51582cd038dSYoshinobu Inoue 
51682cd038dSYoshinobu Inoue /*
517743eee66SSUZUKI Shinsuke  * ND6 timer routine to handle ND6 entries
51882cd038dSYoshinobu Inoue  */
5199b420b3dSAlexander V. Chernikov static void
5206e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick)
521743eee66SSUZUKI Shinsuke {
522ef8d671cSHajimu UMEMOTO 	int canceled;
523ef8d671cSHajimu UMEMOTO 
524e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
525e6950476SBjoern A. Zeeb 
526743eee66SSUZUKI Shinsuke 	if (tick < 0) {
5276e6b3f7cSQing Li 		ln->la_expire = 0;
528743eee66SSUZUKI Shinsuke 		ln->ln_ntick = 0;
5290447c136SAlexander V. Chernikov 		canceled = callout_stop(&ln->lle_timer);
530743eee66SSUZUKI Shinsuke 	} else {
5317d26db17SHiroki Sato 		ln->la_expire = time_uptime + tick / hz;
5326e6b3f7cSQing Li 		LLE_ADDREF(ln);
533743eee66SSUZUKI Shinsuke 		if (tick > INT_MAX) {
534743eee66SSUZUKI Shinsuke 			ln->ln_ntick = tick - INT_MAX;
5350447c136SAlexander V. Chernikov 			canceled = callout_reset(&ln->lle_timer, INT_MAX,
536743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
537743eee66SSUZUKI Shinsuke 		} else {
538743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
5390447c136SAlexander V. Chernikov 			canceled = callout_reset(&ln->lle_timer, tick,
540743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
541743eee66SSUZUKI Shinsuke 		}
542743eee66SSUZUKI Shinsuke 	}
5437c4676ddSRandall Stewart 	if (canceled > 0)
544ef8d671cSHajimu UMEMOTO 		LLE_REMREF(ln);
545743eee66SSUZUKI Shinsuke }
54682cd038dSYoshinobu Inoue 
54726deb882SAlexander V. Chernikov /*
54826deb882SAlexander V. Chernikov  * Gets source address of the first packet in hold queue
54926deb882SAlexander V. Chernikov  * and stores it in @src.
55026deb882SAlexander V. Chernikov  * Returns pointer to @src (if hold queue is not empty) or NULL.
55126deb882SAlexander V. Chernikov  *
552c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
55326deb882SAlexander V. Chernikov  */
554c0b8aeaeSAlexander V. Chernikov static __noinline struct in6_addr *
55526deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src)
55626deb882SAlexander V. Chernikov {
55726deb882SAlexander V. Chernikov 	struct ip6_hdr hdr;
55826deb882SAlexander V. Chernikov 	struct mbuf *m;
55926deb882SAlexander V. Chernikov 
56026deb882SAlexander V. Chernikov 	if (ln->la_hold == NULL)
56126deb882SAlexander V. Chernikov 		return (NULL);
56226deb882SAlexander V. Chernikov 
56326deb882SAlexander V. Chernikov 	/*
56426deb882SAlexander V. Chernikov 	 * assume every packet in la_hold has the same IP header
56526deb882SAlexander V. Chernikov 	 */
56626deb882SAlexander V. Chernikov 	m = ln->la_hold;
56706a60e4bSAlexander V. Chernikov 	if (sizeof(hdr) > m->m_len)
56826deb882SAlexander V. Chernikov 		return (NULL);
56926deb882SAlexander V. Chernikov 
57026deb882SAlexander V. Chernikov 	m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
57126deb882SAlexander V. Chernikov 	*src = hdr.ip6_src;
57226deb882SAlexander V. Chernikov 
57326deb882SAlexander V. Chernikov 	return (src);
57426deb882SAlexander V. Chernikov }
57526deb882SAlexander V. Chernikov 
576aa5f023eSAlexander V. Chernikov /*
57712cb7521SAlexander V. Chernikov  * Checks if we need to switch from STALE state.
57812cb7521SAlexander V. Chernikov  *
57912cb7521SAlexander V. Chernikov  * RFC 4861 requires switching from STALE to DELAY state
58012cb7521SAlexander V. Chernikov  * on first packet matching entry, waiting V_nd6_delay and
58112cb7521SAlexander V. Chernikov  * transition to PROBE state (if upper layer confirmation was
58212cb7521SAlexander V. Chernikov  * not received).
58312cb7521SAlexander V. Chernikov  *
58412cb7521SAlexander V. Chernikov  * This code performs a bit differently:
58512cb7521SAlexander V. Chernikov  * On packet hit we don't change state (but desired state
58612cb7521SAlexander V. Chernikov  * can be guessed by control plane). However, after V_nd6_delay
58712cb7521SAlexander V. Chernikov  * seconds code will transition to PROBE state (so DELAY state
58812cb7521SAlexander V. Chernikov  * is kinda skipped in most situations).
58912cb7521SAlexander V. Chernikov  *
59012cb7521SAlexander V. Chernikov  * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so
59112cb7521SAlexander V. Chernikov  * we perform the following upon entering STALE state:
59212cb7521SAlexander V. Chernikov  *
59312cb7521SAlexander V. Chernikov  * 1) Arm timer to run each V_nd6_delay seconds to make sure that
59412cb7521SAlexander V. Chernikov  * if packet was transmitted at the start of given interval, we
59512cb7521SAlexander V. Chernikov  * would be able to switch to PROBE state in V_nd6_delay seconds
59612cb7521SAlexander V. Chernikov  * as user expects.
59712cb7521SAlexander V. Chernikov  *
59812cb7521SAlexander V. Chernikov  * 2) Reschedule timer until original V_nd6_gctimer expires keeping
59912cb7521SAlexander V. Chernikov  * lle in STALE state (remaining timer value stored in lle_remtime).
60012cb7521SAlexander V. Chernikov  *
60112cb7521SAlexander V. Chernikov  * 3) Reschedule timer if packet was transmitted less that V_nd6_delay
60212cb7521SAlexander V. Chernikov  * seconds ago.
60312cb7521SAlexander V. Chernikov  *
60412cb7521SAlexander V. Chernikov  * Returns non-zero value if the entry is still STALE (storing
60512cb7521SAlexander V. Chernikov  * the next timer interval in @pdelay).
60612cb7521SAlexander V. Chernikov  *
60712cb7521SAlexander V. Chernikov  * Returns zero value if original timer expired or we need to switch to
60812cb7521SAlexander V. Chernikov  * PROBE (store that in @do_switch variable).
60912cb7521SAlexander V. Chernikov  */
61012cb7521SAlexander V. Chernikov static int
61112cb7521SAlexander V. Chernikov nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch)
61212cb7521SAlexander V. Chernikov {
61312cb7521SAlexander V. Chernikov 	int nd_delay, nd_gctimer, r_skip_req;
61412cb7521SAlexander V. Chernikov 	time_t lle_hittime;
61512cb7521SAlexander V. Chernikov 	long delay;
61612cb7521SAlexander V. Chernikov 
61712cb7521SAlexander V. Chernikov 	*do_switch = 0;
61812cb7521SAlexander V. Chernikov 	nd_gctimer = V_nd6_gctimer;
61912cb7521SAlexander V. Chernikov 	nd_delay = V_nd6_delay;
62012cb7521SAlexander V. Chernikov 
62112cb7521SAlexander V. Chernikov 	LLE_REQ_LOCK(lle);
62212cb7521SAlexander V. Chernikov 	r_skip_req = lle->r_skip_req;
62312cb7521SAlexander V. Chernikov 	lle_hittime = lle->lle_hittime;
62412cb7521SAlexander V. Chernikov 	LLE_REQ_UNLOCK(lle);
62512cb7521SAlexander V. Chernikov 
62612cb7521SAlexander V. Chernikov 	if (r_skip_req > 0) {
62712cb7521SAlexander V. Chernikov 
62812cb7521SAlexander V. Chernikov 		/*
62912cb7521SAlexander V. Chernikov 		 * Nonzero r_skip_req value was set upon entering
63012cb7521SAlexander V. Chernikov 		 * STALE state. Since value was not changed, no
63112cb7521SAlexander V. Chernikov 		 * packets were passed using this lle. Ask for
63212cb7521SAlexander V. Chernikov 		 * timer reschedule and keep STALE state.
63312cb7521SAlexander V. Chernikov 		 */
63412cb7521SAlexander V. Chernikov 		delay = (long)(MIN(nd_gctimer, nd_delay));
63512cb7521SAlexander V. Chernikov 		delay *= hz;
63612cb7521SAlexander V. Chernikov 		if (lle->lle_remtime > delay)
63712cb7521SAlexander V. Chernikov 			lle->lle_remtime -= delay;
63812cb7521SAlexander V. Chernikov 		else {
63912cb7521SAlexander V. Chernikov 			delay = lle->lle_remtime;
64012cb7521SAlexander V. Chernikov 			lle->lle_remtime = 0;
64112cb7521SAlexander V. Chernikov 		}
64212cb7521SAlexander V. Chernikov 
64312cb7521SAlexander V. Chernikov 		if (delay == 0) {
64412cb7521SAlexander V. Chernikov 
64512cb7521SAlexander V. Chernikov 			/*
64612cb7521SAlexander V. Chernikov 			 * The original ng6_gctime timeout ended,
64712cb7521SAlexander V. Chernikov 			 * no more rescheduling.
64812cb7521SAlexander V. Chernikov 			 */
64912cb7521SAlexander V. Chernikov 			return (0);
65012cb7521SAlexander V. Chernikov 		}
65112cb7521SAlexander V. Chernikov 
65212cb7521SAlexander V. Chernikov 		*pdelay = delay;
65312cb7521SAlexander V. Chernikov 		return (1);
65412cb7521SAlexander V. Chernikov 	}
65512cb7521SAlexander V. Chernikov 
65612cb7521SAlexander V. Chernikov 	/*
65712cb7521SAlexander V. Chernikov 	 * Packet received. Verify timestamp
65812cb7521SAlexander V. Chernikov 	 */
65912cb7521SAlexander V. Chernikov 	delay = (long)(time_uptime - lle_hittime);
66012cb7521SAlexander V. Chernikov 	if (delay < nd_delay) {
66112cb7521SAlexander V. Chernikov 
66212cb7521SAlexander V. Chernikov 		/*
66312cb7521SAlexander V. Chernikov 		 * V_nd6_delay still not passed since the first
66412cb7521SAlexander V. Chernikov 		 * hit in STALE state.
66512cb7521SAlexander V. Chernikov 		 * Reshedule timer and return.
66612cb7521SAlexander V. Chernikov 		 */
66712cb7521SAlexander V. Chernikov 		*pdelay = (long)(nd_delay - delay) * hz;
66812cb7521SAlexander V. Chernikov 		return (1);
66912cb7521SAlexander V. Chernikov 	}
67012cb7521SAlexander V. Chernikov 
67112cb7521SAlexander V. Chernikov 	/* Request switching to probe */
67212cb7521SAlexander V. Chernikov 	*do_switch = 1;
67312cb7521SAlexander V. Chernikov 	return (0);
67412cb7521SAlexander V. Chernikov }
67512cb7521SAlexander V. Chernikov 
67612cb7521SAlexander V. Chernikov 
67712cb7521SAlexander V. Chernikov /*
678aa5f023eSAlexander V. Chernikov  * Switch @lle state to new state optionally arming timers.
679c0b8aeaeSAlexander V. Chernikov  *
680c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
681aa5f023eSAlexander V. Chernikov  */
682c0b8aeaeSAlexander V. Chernikov __noinline void
683aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(struct llentry *lle, int newstate)
684aa5f023eSAlexander V. Chernikov {
685aa5f023eSAlexander V. Chernikov 	struct ifnet *ifp;
68612cb7521SAlexander V. Chernikov 	int nd_gctimer, nd_delay;
68712cb7521SAlexander V. Chernikov 	long delay, remtime;
688aa5f023eSAlexander V. Chernikov 
689aa5f023eSAlexander V. Chernikov 	delay = 0;
69012cb7521SAlexander V. Chernikov 	remtime = 0;
691aa5f023eSAlexander V. Chernikov 
692aa5f023eSAlexander V. Chernikov 	switch (newstate) {
693aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_INCOMPLETE:
694aa5f023eSAlexander V. Chernikov 		ifp = lle->lle_tbl->llt_ifp;
695aa5f023eSAlexander V. Chernikov 		delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000;
696aa5f023eSAlexander V. Chernikov 		break;
697aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_REACHABLE:
698aa5f023eSAlexander V. Chernikov 		if (!ND6_LLINFO_PERMANENT(lle)) {
699aa5f023eSAlexander V. Chernikov 			ifp = lle->lle_tbl->llt_ifp;
700aa5f023eSAlexander V. Chernikov 			delay = (long)ND_IFINFO(ifp)->reachable * hz;
701aa5f023eSAlexander V. Chernikov 		}
702aa5f023eSAlexander V. Chernikov 		break;
703aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_STALE:
70412cb7521SAlexander V. Chernikov 
70512cb7521SAlexander V. Chernikov 		/*
70612cb7521SAlexander V. Chernikov 		 * Notify fast path that we want to know if any packet
70712cb7521SAlexander V. Chernikov 		 * is transmitted by setting r_skip_req.
70812cb7521SAlexander V. Chernikov 		 */
70912cb7521SAlexander V. Chernikov 		LLE_REQ_LOCK(lle);
71012cb7521SAlexander V. Chernikov 		lle->r_skip_req = 1;
71112cb7521SAlexander V. Chernikov 		LLE_REQ_UNLOCK(lle);
71212cb7521SAlexander V. Chernikov 		nd_delay = V_nd6_delay;
71312cb7521SAlexander V. Chernikov 		nd_gctimer = V_nd6_gctimer;
71412cb7521SAlexander V. Chernikov 
71512cb7521SAlexander V. Chernikov 		delay = (long)(MIN(nd_gctimer, nd_delay)) * hz;
71612cb7521SAlexander V. Chernikov 		remtime = (long)nd_gctimer * hz - delay;
717aa5f023eSAlexander V. Chernikov 		break;
718aa5f023eSAlexander V. Chernikov 	case ND6_LLINFO_DELAY:
719aa5f023eSAlexander V. Chernikov 		lle->la_asked = 0;
720aa5f023eSAlexander V. Chernikov 		delay = (long)V_nd6_delay * hz;
721aa5f023eSAlexander V. Chernikov 		break;
722aa5f023eSAlexander V. Chernikov 	}
723aa5f023eSAlexander V. Chernikov 
724aa5f023eSAlexander V. Chernikov 	if (delay > 0)
725aa5f023eSAlexander V. Chernikov 		nd6_llinfo_settimer_locked(lle, delay);
726aa5f023eSAlexander V. Chernikov 
72712cb7521SAlexander V. Chernikov 	lle->lle_remtime = remtime;
728aa5f023eSAlexander V. Chernikov 	lle->ln_state = newstate;
729aa5f023eSAlexander V. Chernikov }
730aa5f023eSAlexander V. Chernikov 
731c0b8aeaeSAlexander V. Chernikov /*
732c0b8aeaeSAlexander V. Chernikov  * Timer-dependent part of nd state machine.
733c0b8aeaeSAlexander V. Chernikov  *
734c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
735c0b8aeaeSAlexander V. Chernikov  */
736c0b8aeaeSAlexander V. Chernikov static __noinline void
7371272577eSXin LI nd6_llinfo_timer(void *arg)
738743eee66SSUZUKI Shinsuke {
739b8a6e03fSGleb Smirnoff 	struct epoch_tracker et;
7406e6b3f7cSQing Li 	struct llentry *ln;
74126deb882SAlexander V. Chernikov 	struct in6_addr *dst, *pdst, *psrc, src;
742743eee66SSUZUKI Shinsuke 	struct ifnet *ifp;
743435bece4SMark Johnston 	struct nd_ifinfo *ndi;
74412cb7521SAlexander V. Chernikov 	int do_switch, send_ns;
74512cb7521SAlexander V. Chernikov 	long delay;
74682cd038dSYoshinobu Inoue 
74719291ab3SBjoern A. Zeeb 	KASSERT(arg != NULL, ("%s: arg NULL", __func__));
7486e6b3f7cSQing Li 	ln = (struct llentry *)arg;
749435bece4SMark Johnston 	ifp = lltable_get_ifp(ln->lle_tbl);
750435bece4SMark Johnston 	CURVNET_SET(ifp->if_vnet);
751435bece4SMark Johnston 
752435bece4SMark Johnston 	ND6_RLOCK();
7532575fbb8SRandall Stewart 	LLE_WLOCK(ln);
7540447c136SAlexander V. Chernikov 	if (callout_pending(&ln->lle_timer)) {
7552575fbb8SRandall Stewart 		/*
7562575fbb8SRandall Stewart 		 * Here we are a bit odd here in the treatment of
7572575fbb8SRandall Stewart 		 * active/pending. If the pending bit is set, it got
7582575fbb8SRandall Stewart 		 * rescheduled before I ran. The active
7592575fbb8SRandall Stewart 		 * bit we ignore, since if it was stopped
7602575fbb8SRandall Stewart 		 * in ll_tablefree() and was currently running
7612575fbb8SRandall Stewart 		 * it would have return 0 so the code would
7622575fbb8SRandall Stewart 		 * not have deleted it since the callout could
7632575fbb8SRandall Stewart 		 * not be stopped so we want to go through
7642575fbb8SRandall Stewart 		 * with the delete here now. If the callout
7652575fbb8SRandall Stewart 		 * was restarted, the pending bit will be back on and
7662575fbb8SRandall Stewart 		 * we just want to bail since the callout_reset would
7672575fbb8SRandall Stewart 		 * return 1 and our reference would have been removed
7682575fbb8SRandall Stewart 		 * by nd6_llinfo_settimer_locked above since canceled
7692575fbb8SRandall Stewart 		 * would have been 1.
7702575fbb8SRandall Stewart 		 */
7712575fbb8SRandall Stewart 		LLE_WUNLOCK(ln);
772435bece4SMark Johnston 		ND6_RUNLOCK();
773435bece4SMark Johnston 		CURVNET_RESTORE();
7742575fbb8SRandall Stewart 		return;
7752575fbb8SRandall Stewart 	}
776b8a6e03fSGleb Smirnoff 	NET_EPOCH_ENTER(et);
77726deb882SAlexander V. Chernikov 	ndi = ND_IFINFO(ifp);
77826deb882SAlexander V. Chernikov 	send_ns = 0;
77926deb882SAlexander V. Chernikov 	dst = &ln->r_l3addr.addr6;
78026deb882SAlexander V. Chernikov 	pdst = dst;
78182cd038dSYoshinobu Inoue 
782743eee66SSUZUKI Shinsuke 	if (ln->ln_ntick > 0) {
783743eee66SSUZUKI Shinsuke 		if (ln->ln_ntick > INT_MAX) {
784743eee66SSUZUKI Shinsuke 			ln->ln_ntick -= INT_MAX;
785e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, INT_MAX);
786743eee66SSUZUKI Shinsuke 		} else {
787743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
788e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, ln->ln_ntick);
78982cd038dSYoshinobu Inoue 		}
7906e6b3f7cSQing Li 		goto done;
791743eee66SSUZUKI Shinsuke 	}
792743eee66SSUZUKI Shinsuke 
793287e3cb4SHajimu UMEMOTO 	if (ln->la_flags & LLE_STATIC) {
7946e6b3f7cSQing Li 		goto done;
7956e6b3f7cSQing Li 	}
79682cd038dSYoshinobu Inoue 
7976e6b3f7cSQing Li 	if (ln->la_flags & LLE_DELETED) {
798435bece4SMark Johnston 		nd6_free(&ln, 0);
7996e6b3f7cSQing Li 		goto done;
8006e6b3f7cSQing Li 	}
80182cd038dSYoshinobu Inoue 
80282cd038dSYoshinobu Inoue 	switch (ln->ln_state) {
80382cd038dSYoshinobu Inoue 	case ND6_LLINFO_INCOMPLETE:
8046e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_mmaxtries) {
8056e6b3f7cSQing Li 			ln->la_asked++;
80626deb882SAlexander V. Chernikov 			send_ns = 1;
80726deb882SAlexander V. Chernikov 			/* Send NS to multicast address */
80826deb882SAlexander V. Chernikov 			pdst = NULL;
80982cd038dSYoshinobu Inoue 		} else {
8106e6b3f7cSQing Li 			struct mbuf *m = ln->la_hold;
81182cd038dSYoshinobu Inoue 			if (m) {
81231d4137bSSUZUKI Shinsuke 				struct mbuf *m0;
81331d4137bSSUZUKI Shinsuke 
81482cd038dSYoshinobu Inoue 				/*
8156e6b3f7cSQing Li 				 * assuming every packet in la_hold has the
816e6950476SBjoern A. Zeeb 				 * same IP header.  Send error after unlock.
81782cd038dSYoshinobu Inoue 				 */
81831d4137bSSUZUKI Shinsuke 				m0 = m->m_nextpkt;
81931d4137bSSUZUKI Shinsuke 				m->m_nextpkt = NULL;
8206e6b3f7cSQing Li 				ln->la_hold = m0;
82131d4137bSSUZUKI Shinsuke 				clear_llinfo_pqueue(ln);
82282cd038dSYoshinobu Inoue 			}
823435bece4SMark Johnston 			nd6_free(&ln, 0);
824bc74b819SAndrew Gallatin 			if (m != NULL) {
825bc74b819SAndrew Gallatin 				struct mbuf *n = m;
826bc74b819SAndrew Gallatin 
827bc74b819SAndrew Gallatin 				/*
828bc74b819SAndrew Gallatin 				 * if there are any ummapped mbufs, we
829bc74b819SAndrew Gallatin 				 * must free them, rather than using
830bc74b819SAndrew Gallatin 				 * them for an ICMP, as they cannot be
831bc74b819SAndrew Gallatin 				 * checksummed.
832bc74b819SAndrew Gallatin 				 */
833bc74b819SAndrew Gallatin 				while ((n = n->m_next) != NULL) {
834bc74b819SAndrew Gallatin 					if (n->m_flags & M_EXTPG)
835bc74b819SAndrew Gallatin 						break;
836bc74b819SAndrew Gallatin 				}
837bc74b819SAndrew Gallatin 				if (n != NULL) {
838bc74b819SAndrew Gallatin 					m_freem(m);
839bc74b819SAndrew Gallatin 					m = NULL;
840bc74b819SAndrew Gallatin 				} else {
841e6950476SBjoern A. Zeeb 					icmp6_error2(m, ICMP6_DST_UNREACH,
842e6950476SBjoern A. Zeeb 					    ICMP6_DST_UNREACH_ADDR, 0, ifp);
84382cd038dSYoshinobu Inoue 				}
844bc74b819SAndrew Gallatin 			}
845bc74b819SAndrew Gallatin 		}
84682cd038dSYoshinobu Inoue 		break;
84782cd038dSYoshinobu Inoue 	case ND6_LLINFO_REACHABLE:
848aa5f023eSAlexander V. Chernikov 		if (!ND6_LLINFO_PERMANENT(ln))
849aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
85082cd038dSYoshinobu Inoue 		break;
85133841545SHajimu UMEMOTO 
85233841545SHajimu UMEMOTO 	case ND6_LLINFO_STALE:
85312cb7521SAlexander V. Chernikov 		if (nd6_is_stale(ln, &delay, &do_switch) != 0) {
85412cb7521SAlexander V. Chernikov 
85512cb7521SAlexander V. Chernikov 			/*
85612cb7521SAlexander V. Chernikov 			 * No packet has used this entry and GC timeout
85712cb7521SAlexander V. Chernikov 			 * has not been passed. Reshedule timer and
85812cb7521SAlexander V. Chernikov 			 * return.
85912cb7521SAlexander V. Chernikov 			 */
86012cb7521SAlexander V. Chernikov 			nd6_llinfo_settimer_locked(ln, delay);
86112cb7521SAlexander V. Chernikov 			break;
86212cb7521SAlexander V. Chernikov 		}
86312cb7521SAlexander V. Chernikov 
86412cb7521SAlexander V. Chernikov 		if (do_switch == 0) {
86512cb7521SAlexander V. Chernikov 
86612cb7521SAlexander V. Chernikov 			/*
86712cb7521SAlexander V. Chernikov 			 * GC timer has ended and entry hasn't been used.
86812cb7521SAlexander V. Chernikov 			 * Run Garbage collector (RFC 4861, 5.3)
86912cb7521SAlexander V. Chernikov 			 */
870435bece4SMark Johnston 			if (!ND6_LLINFO_PERMANENT(ln))
871435bece4SMark Johnston 				nd6_free(&ln, 1);
87233841545SHajimu UMEMOTO 			break;
87312cb7521SAlexander V. Chernikov 		}
87412cb7521SAlexander V. Chernikov 
87512cb7521SAlexander V. Chernikov 		/* Entry has been used AND delay timer has ended. */
87612cb7521SAlexander V. Chernikov 
87712cb7521SAlexander V. Chernikov 		/* FALLTHROUGH */
87833841545SHajimu UMEMOTO 
87982cd038dSYoshinobu Inoue 	case ND6_LLINFO_DELAY:
880686cdd19SJun-ichiro itojun Hagino 		if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
881686cdd19SJun-ichiro itojun Hagino 			/* We need NUD */
8826e6b3f7cSQing Li 			ln->la_asked = 1;
883aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE);
88426deb882SAlexander V. Chernikov 			send_ns = 1;
885aa5f023eSAlexander V. Chernikov 		} else
886aa5f023eSAlexander V. Chernikov 			nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */
88782cd038dSYoshinobu Inoue 		break;
88882cd038dSYoshinobu Inoue 	case ND6_LLINFO_PROBE:
8896e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_umaxtries) {
8906e6b3f7cSQing Li 			ln->la_asked++;
89126deb882SAlexander V. Chernikov 			send_ns = 1;
89282cd038dSYoshinobu Inoue 		} else {
893435bece4SMark Johnston 			nd6_free(&ln, 0);
89482cd038dSYoshinobu Inoue 		}
89582cd038dSYoshinobu Inoue 		break;
896e6950476SBjoern A. Zeeb 	default:
897e6950476SBjoern A. Zeeb 		panic("%s: paths in a dark night can be confusing: %d",
898e6950476SBjoern A. Zeeb 		    __func__, ln->ln_state);
89982cd038dSYoshinobu Inoue 	}
9006e6b3f7cSQing Li done:
901435bece4SMark Johnston 	if (ln != NULL)
902435bece4SMark Johnston 		ND6_RUNLOCK();
90326deb882SAlexander V. Chernikov 	if (send_ns != 0) {
90426deb882SAlexander V. Chernikov 		nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
90526deb882SAlexander V. Chernikov 		psrc = nd6_llinfo_get_holdsrc(ln, &src);
90626deb882SAlexander V. Chernikov 		LLE_FREE_LOCKED(ln);
90726deb882SAlexander V. Chernikov 		ln = NULL;
90826deb882SAlexander V. Chernikov 		nd6_ns_output(ifp, psrc, pdst, dst, NULL);
90926deb882SAlexander V. Chernikov 	}
91026deb882SAlexander V. Chernikov 
9116e6b3f7cSQing Li 	if (ln != NULL)
912e6950476SBjoern A. Zeeb 		LLE_FREE_LOCKED(ln);
913b8a6e03fSGleb Smirnoff 	NET_EPOCH_EXIT(et);
914f0c0b143SHajimu UMEMOTO 	CURVNET_RESTORE();
91582cd038dSYoshinobu Inoue }
91682cd038dSYoshinobu Inoue 
917743eee66SSUZUKI Shinsuke 
918743eee66SSUZUKI Shinsuke /*
919743eee66SSUZUKI Shinsuke  * ND6 timer routine to expire default route list and prefix list
920743eee66SSUZUKI Shinsuke  */
921743eee66SSUZUKI Shinsuke void
9228b615593SMarko Zec nd6_timer(void *arg)
923743eee66SSUZUKI Shinsuke {
92421ca7b57SMarko Zec 	CURVNET_SET((struct vnet *) arg);
925b8a6e03fSGleb Smirnoff 	struct epoch_tracker et;
926d748f7efSMark Johnston 	struct nd_prhead prl;
9273b0b2840SJohn Baldwin 	struct nd_prefix *pr, *npr;
928ca1163bdSMark Johnston 	struct ifnet *ifp;
929743eee66SSUZUKI Shinsuke 	struct in6_ifaddr *ia6, *nia6;
9308cd3b204SMark Johnston 	uint64_t genid;
931743eee66SSUZUKI Shinsuke 
932d748f7efSMark Johnston 	LIST_INIT(&prl);
9334de485feSMark Johnston 
934d6dbfed8SGleb Smirnoff 	NET_EPOCH_ENTER(et);
935ad675b32SBjoern A. Zeeb 	nd6_defrouter_timer();
93682cd038dSYoshinobu Inoue 
93733841545SHajimu UMEMOTO 	/*
93833841545SHajimu UMEMOTO 	 * expire interface addresses.
93933841545SHajimu UMEMOTO 	 * in the past the loop was inside prefix expiry processing.
94033841545SHajimu UMEMOTO 	 * However, from a stricter speci-confrmance standpoint, we should
94133841545SHajimu UMEMOTO 	 * rather separate address lifetimes and prefix lifetimes.
942d1da0a06SRobert Watson 	 *
943d1da0a06SRobert Watson 	 * XXXRW: in6_ifaddrhead locking.
94433841545SHajimu UMEMOTO 	 */
94533841545SHajimu UMEMOTO   addrloop:
946d7c5a620SMatt Macy 	CK_STAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) {
94782cd038dSYoshinobu Inoue 		/* check address lifetime */
94833841545SHajimu UMEMOTO 		if (IFA6_IS_INVALID(ia6)) {
94933841545SHajimu UMEMOTO 			int regen = 0;
95033841545SHajimu UMEMOTO 
95133841545SHajimu UMEMOTO 			/*
95233841545SHajimu UMEMOTO 			 * If the expiring address is temporary, try
95333841545SHajimu UMEMOTO 			 * regenerating a new one.  This would be useful when
95488ff5695SSUZUKI Shinsuke 			 * we suspended a laptop PC, then turned it on after a
95533841545SHajimu UMEMOTO 			 * period that could invalidate all temporary
95633841545SHajimu UMEMOTO 			 * addresses.  Although we may have to restart the
95733841545SHajimu UMEMOTO 			 * loop (see below), it must be after purging the
95833841545SHajimu UMEMOTO 			 * address.  Otherwise, we'd see an infinite loop of
95933841545SHajimu UMEMOTO 			 * regeneration.
96033841545SHajimu UMEMOTO 			 */
961603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
96233841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
96333841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0)
96433841545SHajimu UMEMOTO 					regen = 1;
96533841545SHajimu UMEMOTO 			}
96633841545SHajimu UMEMOTO 
96733841545SHajimu UMEMOTO 			in6_purgeaddr(&ia6->ia_ifa);
96833841545SHajimu UMEMOTO 
96933841545SHajimu UMEMOTO 			if (regen)
97033841545SHajimu UMEMOTO 				goto addrloop; /* XXX: see below */
97143068328SHajimu UMEMOTO 		} else if (IFA6_IS_DEPRECATED(ia6)) {
97233841545SHajimu UMEMOTO 			int oldflags = ia6->ia6_flags;
97333841545SHajimu UMEMOTO 
97482cd038dSYoshinobu Inoue 			ia6->ia6_flags |= IN6_IFF_DEPRECATED;
97533841545SHajimu UMEMOTO 
97633841545SHajimu UMEMOTO 			/*
97733841545SHajimu UMEMOTO 			 * If a temporary address has just become deprecated,
97833841545SHajimu UMEMOTO 			 * regenerate a new one if possible.
97933841545SHajimu UMEMOTO 			 */
980603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
98133841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
98233841545SHajimu UMEMOTO 			    (oldflags & IN6_IFF_DEPRECATED) == 0) {
98333841545SHajimu UMEMOTO 
98433841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0) {
98533841545SHajimu UMEMOTO 					/*
98633841545SHajimu UMEMOTO 					 * A new temporary address is
98733841545SHajimu UMEMOTO 					 * generated.
98833841545SHajimu UMEMOTO 					 * XXX: this means the address chain
98933841545SHajimu UMEMOTO 					 * has changed while we are still in
99033841545SHajimu UMEMOTO 					 * the loop.  Although the change
99133841545SHajimu UMEMOTO 					 * would not cause disaster (because
99288ff5695SSUZUKI Shinsuke 					 * it's not a deletion, but an
99388ff5695SSUZUKI Shinsuke 					 * addition,) we'd rather restart the
99433841545SHajimu UMEMOTO 					 * loop just for safety.  Or does this
99533841545SHajimu UMEMOTO 					 * significantly reduce performance??
99633841545SHajimu UMEMOTO 					 */
99733841545SHajimu UMEMOTO 					goto addrloop;
99833841545SHajimu UMEMOTO 				}
99933841545SHajimu UMEMOTO 			}
10006401c828SHiroki Sato 		} else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) {
10016401c828SHiroki Sato 			/*
10026401c828SHiroki Sato 			 * Schedule DAD for a tentative address.  This happens
10036401c828SHiroki Sato 			 * if the interface was down or not running
10046401c828SHiroki Sato 			 * when the address was configured.
10056401c828SHiroki Sato 			 */
10066401c828SHiroki Sato 			int delay;
10076401c828SHiroki Sato 
10086401c828SHiroki Sato 			delay = arc4random() %
10096401c828SHiroki Sato 			    (MAX_RTR_SOLICITATION_DELAY * hz);
10106401c828SHiroki Sato 			nd6_dad_start((struct ifaddr *)ia6, delay);
101183649f07SHajimu UMEMOTO 		} else {
101233841545SHajimu UMEMOTO 			/*
10136401c828SHiroki Sato 			 * Check status of the interface.  If it is down,
10146401c828SHiroki Sato 			 * mark the address as tentative for future DAD.
10156401c828SHiroki Sato 			 */
1016ca1163bdSMark Johnston 			ifp = ia6->ia_ifp;
1017ca1163bdSMark Johnston 			if ((ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0 &&
1018ca1163bdSMark Johnston 			    ((ifp->if_flags & IFF_UP) == 0 ||
1019ca1163bdSMark Johnston 			    (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
1020ca1163bdSMark Johnston 			    (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) != 0)){
10216401c828SHiroki Sato 				ia6->ia6_flags &= ~IN6_IFF_DUPLICATED;
10226401c828SHiroki Sato 				ia6->ia6_flags |= IN6_IFF_TENTATIVE;
10236401c828SHiroki Sato 			}
1024ca1163bdSMark Johnston 
10256401c828SHiroki Sato 			/*
102633841545SHajimu UMEMOTO 			 * A new RA might have made a deprecated address
102733841545SHajimu UMEMOTO 			 * preferred.
102833841545SHajimu UMEMOTO 			 */
102933841545SHajimu UMEMOTO 			ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
103082cd038dSYoshinobu Inoue 		}
103182cd038dSYoshinobu Inoue 	}
1032b8a6e03fSGleb Smirnoff 	NET_EPOCH_EXIT(et);
103382cd038dSYoshinobu Inoue 
1034d748f7efSMark Johnston 	ND6_WLOCK();
1035d748f7efSMark Johnston restart:
10363b0b2840SJohn Baldwin 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
103782cd038dSYoshinobu Inoue 		/*
1038d748f7efSMark Johnston 		 * Expire prefixes. Since the pltime is only used for
1039d748f7efSMark Johnston 		 * autoconfigured addresses, pltime processing for prefixes is
1040d748f7efSMark Johnston 		 * not necessary.
1041d748f7efSMark Johnston 		 *
1042d748f7efSMark Johnston 		 * Only unlink after all derived addresses have expired. This
1043d748f7efSMark Johnston 		 * may not occur until two hours after the prefix has expired
1044d748f7efSMark Johnston 		 * per RFC 4862. If the prefix expires before its derived
1045d748f7efSMark Johnston 		 * addresses, mark it off-link. This will be done automatically
1046d748f7efSMark Johnston 		 * after unlinking if no address references remain.
104782cd038dSYoshinobu Inoue 		 */
1048d748f7efSMark Johnston 		if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME ||
1049d748f7efSMark Johnston 		    time_uptime - pr->ndpr_lastupdate <= pr->ndpr_vltime)
1050d748f7efSMark Johnston 			continue;
105182cd038dSYoshinobu Inoue 
1052d748f7efSMark Johnston 		if (pr->ndpr_addrcnt == 0) {
1053d748f7efSMark Johnston 			nd6_prefix_unlink(pr, &prl);
1054d748f7efSMark Johnston 			continue;
10553b0b2840SJohn Baldwin 		}
1056d748f7efSMark Johnston 		if ((pr->ndpr_stateflags & NDPRF_ONLINK) != 0) {
10578cd3b204SMark Johnston 			genid = V_nd6_list_genid;
10588cd3b204SMark Johnston 			nd6_prefix_ref(pr);
1059d748f7efSMark Johnston 			ND6_WUNLOCK();
1060d748f7efSMark Johnston 			ND6_ONLINK_LOCK();
10618cd3b204SMark Johnston 			(void)nd6_prefix_offlink(pr);
10628cd3b204SMark Johnston 			ND6_ONLINK_UNLOCK();
1063d748f7efSMark Johnston 			ND6_WLOCK();
10648cd3b204SMark Johnston 			nd6_prefix_rele(pr);
10658cd3b204SMark Johnston 			if (genid != V_nd6_list_genid)
1066d748f7efSMark Johnston 				goto restart;
1067d748f7efSMark Johnston 		}
1068d748f7efSMark Johnston 	}
1069d748f7efSMark Johnston 	ND6_WUNLOCK();
1070d748f7efSMark Johnston 
1071d748f7efSMark Johnston 	while ((pr = LIST_FIRST(&prl)) != NULL) {
1072d748f7efSMark Johnston 		LIST_REMOVE(pr, ndpr_entry);
1073d748f7efSMark Johnston 		nd6_prefix_del(pr);
107482cd038dSYoshinobu Inoue 	}
107599a0c406SBjoern A. Zeeb 
107699a0c406SBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz,
107799a0c406SBjoern A. Zeeb 	    nd6_timer, curvnet);
107899a0c406SBjoern A. Zeeb 
10798b615593SMarko Zec 	CURVNET_RESTORE();
108082cd038dSYoshinobu Inoue }
108182cd038dSYoshinobu Inoue 
10821272577eSXin LI /*
10831272577eSXin LI  * ia6 - deprecated/invalidated temporary address
10841272577eSXin LI  */
108533841545SHajimu UMEMOTO static int
10861272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6)
108733841545SHajimu UMEMOTO {
108833841545SHajimu UMEMOTO 	struct ifaddr *ifa;
108933841545SHajimu UMEMOTO 	struct ifnet *ifp;
109033841545SHajimu UMEMOTO 	struct in6_ifaddr *public_ifa6 = NULL;
109133841545SHajimu UMEMOTO 
1092b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
1093b8a6e03fSGleb Smirnoff 
109433841545SHajimu UMEMOTO 	ifp = ia6->ia_ifa.ifa_ifp;
1095d7c5a620SMatt Macy 	CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
109633841545SHajimu UMEMOTO 		struct in6_ifaddr *it6;
109733841545SHajimu UMEMOTO 
109833841545SHajimu UMEMOTO 		if (ifa->ifa_addr->sa_family != AF_INET6)
109933841545SHajimu UMEMOTO 			continue;
110033841545SHajimu UMEMOTO 
110133841545SHajimu UMEMOTO 		it6 = (struct in6_ifaddr *)ifa;
110233841545SHajimu UMEMOTO 
110333841545SHajimu UMEMOTO 		/* ignore no autoconf addresses. */
110433841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
110533841545SHajimu UMEMOTO 			continue;
110633841545SHajimu UMEMOTO 
110733841545SHajimu UMEMOTO 		/* ignore autoconf addresses with different prefixes. */
110833841545SHajimu UMEMOTO 		if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
110933841545SHajimu UMEMOTO 			continue;
111033841545SHajimu UMEMOTO 
111133841545SHajimu UMEMOTO 		/*
111233841545SHajimu UMEMOTO 		 * Now we are looking at an autoconf address with the same
111333841545SHajimu UMEMOTO 		 * prefix as ours.  If the address is temporary and is still
111433841545SHajimu UMEMOTO 		 * preferred, do not create another one.  It would be rare, but
111533841545SHajimu UMEMOTO 		 * could happen, for example, when we resume a laptop PC after
111633841545SHajimu UMEMOTO 		 * a long period.
111733841545SHajimu UMEMOTO 		 */
111833841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
111933841545SHajimu UMEMOTO 		    !IFA6_IS_DEPRECATED(it6)) {
112033841545SHajimu UMEMOTO 			public_ifa6 = NULL;
112133841545SHajimu UMEMOTO 			break;
112233841545SHajimu UMEMOTO 		}
112333841545SHajimu UMEMOTO 
112433841545SHajimu UMEMOTO 		/*
112533841545SHajimu UMEMOTO 		 * This is a public autoconf address that has the same prefix
112633841545SHajimu UMEMOTO 		 * as ours.  If it is preferred, keep it.  We can't break the
112733841545SHajimu UMEMOTO 		 * loop here, because there may be a still-preferred temporary
112833841545SHajimu UMEMOTO 		 * address with the prefix.
112933841545SHajimu UMEMOTO 		 */
113033841545SHajimu UMEMOTO 		if (!IFA6_IS_DEPRECATED(it6))
113133841545SHajimu UMEMOTO 			public_ifa6 = it6;
1132dff78447SMark Johnston 	}
1133c1752bcdSQing Li 	if (public_ifa6 != NULL)
1134c1752bcdSQing Li 		ifa_ref(&public_ifa6->ia_ifa);
113533841545SHajimu UMEMOTO 
113633841545SHajimu UMEMOTO 	if (public_ifa6 != NULL) {
113733841545SHajimu UMEMOTO 		int e;
113833841545SHajimu UMEMOTO 
1139743eee66SSUZUKI Shinsuke 		if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
1140c1752bcdSQing Li 			ifa_free(&public_ifa6->ia_ifa);
114133841545SHajimu UMEMOTO 			log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
114233841545SHajimu UMEMOTO 			    " tmp addr,errno=%d\n", e);
114333841545SHajimu UMEMOTO 			return (-1);
114433841545SHajimu UMEMOTO 		}
1145c1752bcdSQing Li 		ifa_free(&public_ifa6->ia_ifa);
114633841545SHajimu UMEMOTO 		return (0);
114733841545SHajimu UMEMOTO 	}
114833841545SHajimu UMEMOTO 
114933841545SHajimu UMEMOTO 	return (-1);
115033841545SHajimu UMEMOTO }
115133841545SHajimu UMEMOTO 
1152686cdd19SJun-ichiro itojun Hagino /*
1153df890b8eSMark Johnston  * Remove prefix and default router list entries corresponding to ifp. Neighbor
1154df890b8eSMark Johnston  * cache entries are freed in in6_domifdetach().
1155686cdd19SJun-ichiro itojun Hagino  */
1156686cdd19SJun-ichiro itojun Hagino void
11571272577eSXin LI nd6_purge(struct ifnet *ifp)
1158686cdd19SJun-ichiro itojun Hagino {
1159d748f7efSMark Johnston 	struct nd_prhead prl;
1160686cdd19SJun-ichiro itojun Hagino 	struct nd_prefix *pr, *npr;
1161686cdd19SJun-ichiro itojun Hagino 
1162d748f7efSMark Johnston 	LIST_INIT(&prl);
11634de485feSMark Johnston 
1164ad675b32SBjoern A. Zeeb 	/* Purge default router list entries toward ifp. */
1165ad675b32SBjoern A. Zeeb 	nd6_defrouter_purge(ifp);
1166d748f7efSMark Johnston 
1167ad675b32SBjoern A. Zeeb 	ND6_WLOCK();
1168d748f7efSMark Johnston 	/*
1169d748f7efSMark Johnston 	 * Remove prefixes on ifp. We should have already removed addresses on
1170d748f7efSMark Johnston 	 * this interface, so no addresses should be referencing these prefixes.
1171d748f7efSMark Johnston 	 */
1172d748f7efSMark Johnston 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
1173d748f7efSMark Johnston 		if (pr->ndpr_ifp == ifp)
1174d748f7efSMark Johnston 			nd6_prefix_unlink(pr, &prl);
1175d748f7efSMark Johnston 	}
11764de485feSMark Johnston 	ND6_WUNLOCK();
11774de485feSMark Johnston 
1178ad675b32SBjoern A. Zeeb 	/* Delete the unlinked prefix objects. */
1179d748f7efSMark Johnston 	while ((pr = LIST_FIRST(&prl)) != NULL) {
1180d748f7efSMark Johnston 		LIST_REMOVE(pr, ndpr_entry);
1181d748f7efSMark Johnston 		nd6_prefix_del(pr);
1182686cdd19SJun-ichiro itojun Hagino 	}
1183686cdd19SJun-ichiro itojun Hagino 
1184686cdd19SJun-ichiro itojun Hagino 	/* cancel default outgoing interface setting */
1185603724d3SBjoern A. Zeeb 	if (V_nd6_defifindex == ifp->if_index)
1186686cdd19SJun-ichiro itojun Hagino 		nd6_setdefaultiface(0);
1187686cdd19SJun-ichiro itojun Hagino 
1188e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1189a283298cSHiroki Sato 		/* Refresh default router list. */
1190559b4296SAlan Somers 		defrouter_select_fib(ifp->if_fib);
11916e6b3f7cSQing Li 	}
11921026ccc4SHajimu UMEMOTO }
1193686cdd19SJun-ichiro itojun Hagino 
1194686cdd19SJun-ichiro itojun Hagino /*
11956e6b3f7cSQing Li  * the caller acquires and releases the lock on the lltbls
11966e6b3f7cSQing Li  * Returns the llentry locked
1197686cdd19SJun-ichiro itojun Hagino  */
11986e6b3f7cSQing Li struct llentry *
1199f0316e1aSAlexander V. Chernikov nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
120082cd038dSYoshinobu Inoue {
120182cd038dSYoshinobu Inoue 	struct sockaddr_in6 sin6;
12026e6b3f7cSQing Li 	struct llentry *ln;
120382cd038dSYoshinobu Inoue 
120482cd038dSYoshinobu Inoue 	bzero(&sin6, sizeof(sin6));
120582cd038dSYoshinobu Inoue 	sin6.sin6_len = sizeof(struct sockaddr_in6);
120682cd038dSYoshinobu Inoue 	sin6.sin6_family = AF_INET6;
120782cd038dSYoshinobu Inoue 	sin6.sin6_addr = *addr6;
1208686cdd19SJun-ichiro itojun Hagino 
12096e6b3f7cSQing Li 	IF_AFDATA_LOCK_ASSERT(ifp);
121082cd038dSYoshinobu Inoue 
1211f506d933SAlexander V. Chernikov 	ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6);
1212b4b1367aSAlexander V. Chernikov 
1213b4b1367aSAlexander V. Chernikov 	return (ln);
1214b4b1367aSAlexander V. Chernikov }
1215b4b1367aSAlexander V. Chernikov 
1216d64df9a2SBjoern A. Zeeb static struct llentry *
1217f0316e1aSAlexander V. Chernikov nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp)
1218b4b1367aSAlexander V. Chernikov {
1219b4b1367aSAlexander V. Chernikov 	struct sockaddr_in6 sin6;
1220b4b1367aSAlexander V. Chernikov 	struct llentry *ln;
1221b4b1367aSAlexander V. Chernikov 
1222b4b1367aSAlexander V. Chernikov 	bzero(&sin6, sizeof(sin6));
1223b4b1367aSAlexander V. Chernikov 	sin6.sin6_len = sizeof(struct sockaddr_in6);
1224b4b1367aSAlexander V. Chernikov 	sin6.sin6_family = AF_INET6;
1225b4b1367aSAlexander V. Chernikov 	sin6.sin6_addr = *addr6;
1226b4b1367aSAlexander V. Chernikov 
12275a255516SAlexander V. Chernikov 	ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6);
1228b4b1367aSAlexander V. Chernikov 	if (ln != NULL)
122982cd038dSYoshinobu Inoue 		ln->ln_state = ND6_LLINFO_NOSTATE;
12306e6b3f7cSQing Li 
12316e6b3f7cSQing Li 	return (ln);
123282cd038dSYoshinobu Inoue }
123382cd038dSYoshinobu Inoue 
123482cd038dSYoshinobu Inoue /*
123577b691e0SBrian Feldman  * Test whether a given IPv6 address is a neighbor or not, ignoring
123677b691e0SBrian Feldman  * the actual neighbor cache.  The neighbor cache is ignored in order
123777b691e0SBrian Feldman  * to not reenter the routing code from within itself.
123882cd038dSYoshinobu Inoue  */
123977b691e0SBrian Feldman static int
1240f0316e1aSAlexander V. Chernikov nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
124182cd038dSYoshinobu Inoue {
12424208ea14SHajimu UMEMOTO 	struct nd_prefix *pr;
1243559b4296SAlan Somers 	struct ifaddr *ifa;
12449a1b64d5SAlexander V. Chernikov 	struct rt_addrinfo info;
12459a1b64d5SAlexander V. Chernikov 	struct sockaddr_in6 rt_key;
1246f7d91d8cSMark Johnston 	const struct sockaddr *dst6;
1247d748f7efSMark Johnston 	uint64_t genid;
1248d748f7efSMark Johnston 	int error, fibnum;
124982cd038dSYoshinobu Inoue 
1250686cdd19SJun-ichiro itojun Hagino 	/*
1251686cdd19SJun-ichiro itojun Hagino 	 * A link-local address is always a neighbor.
12524208ea14SHajimu UMEMOTO 	 * XXX: a link does not necessarily specify a single interface.
1253686cdd19SJun-ichiro itojun Hagino 	 */
1254a1f7e5f8SHajimu UMEMOTO 	if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
1255a1f7e5f8SHajimu UMEMOTO 		struct sockaddr_in6 sin6_copy;
1256a1f7e5f8SHajimu UMEMOTO 		u_int32_t zone;
1257a1f7e5f8SHajimu UMEMOTO 
1258a1f7e5f8SHajimu UMEMOTO 		/*
1259a1f7e5f8SHajimu UMEMOTO 		 * We need sin6_copy since sa6_recoverscope() may modify the
1260a1f7e5f8SHajimu UMEMOTO 		 * content (XXX).
1261a1f7e5f8SHajimu UMEMOTO 		 */
1262a1f7e5f8SHajimu UMEMOTO 		sin6_copy = *addr;
1263a1f7e5f8SHajimu UMEMOTO 		if (sa6_recoverscope(&sin6_copy))
1264a1f7e5f8SHajimu UMEMOTO 			return (0); /* XXX: should be impossible */
1265a1f7e5f8SHajimu UMEMOTO 		if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
1266a1f7e5f8SHajimu UMEMOTO 			return (0);
1267a1f7e5f8SHajimu UMEMOTO 		if (sin6_copy.sin6_scope_id == zone)
126882cd038dSYoshinobu Inoue 			return (1);
1269a1f7e5f8SHajimu UMEMOTO 		else
1270a1f7e5f8SHajimu UMEMOTO 			return (0);
1271a1f7e5f8SHajimu UMEMOTO 	}
127282cd038dSYoshinobu Inoue 
12739a1b64d5SAlexander V. Chernikov 	bzero(&rt_key, sizeof(rt_key));
12749a1b64d5SAlexander V. Chernikov 	bzero(&info, sizeof(info));
12759a1b64d5SAlexander V. Chernikov 	info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key;
12769a1b64d5SAlexander V. Chernikov 
127782cd038dSYoshinobu Inoue 	/*
127882cd038dSYoshinobu Inoue 	 * If the address matches one of our addresses,
127982cd038dSYoshinobu Inoue 	 * it should be a neighbor.
12804208ea14SHajimu UMEMOTO 	 * If the address matches one of our on-link prefixes, it should be a
12814208ea14SHajimu UMEMOTO 	 * neighbor.
128282cd038dSYoshinobu Inoue 	 */
1283d748f7efSMark Johnston 	ND6_RLOCK();
1284d748f7efSMark Johnston restart:
12853b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
12864208ea14SHajimu UMEMOTO 		if (pr->ndpr_ifp != ifp)
12874208ea14SHajimu UMEMOTO 			continue;
128882cd038dSYoshinobu Inoue 
1289d748f7efSMark Johnston 		if ((pr->ndpr_stateflags & NDPRF_ONLINK) == 0) {
1290f7d91d8cSMark Johnston 			dst6 = (const struct sockaddr *)&pr->ndpr_prefix;
12919a1b64d5SAlexander V. Chernikov 
1292559b4296SAlan Somers 			/*
1293559b4296SAlan Somers 			 * We only need to check all FIBs if add_addr_allfibs
1294559b4296SAlan Somers 			 * is unset. If set, checking any FIB will suffice.
1295559b4296SAlan Somers 			 */
1296559b4296SAlan Somers 			fibnum = V_rt_add_addr_allfibs ? rt_numfibs - 1 : 0;
1297559b4296SAlan Somers 			for (; fibnum < rt_numfibs; fibnum++) {
1298d748f7efSMark Johnston 				genid = V_nd6_list_genid;
1299d748f7efSMark Johnston 				ND6_RUNLOCK();
1300d748f7efSMark Johnston 
1301559b4296SAlan Somers 				/*
1302559b4296SAlan Somers 				 * Restore length field before
1303559b4296SAlan Somers 				 * retrying lookup
1304559b4296SAlan Somers 				 */
13059a1b64d5SAlexander V. Chernikov 				rt_key.sin6_len = sizeof(rt_key);
1306559b4296SAlan Somers 				error = rib_lookup_info(fibnum, dst6, 0, 0,
1307559b4296SAlan Somers 						        &info);
1308d748f7efSMark Johnston 
1309d748f7efSMark Johnston 				ND6_RLOCK();
1310d748f7efSMark Johnston 				if (genid != V_nd6_list_genid)
1311d748f7efSMark Johnston 					goto restart;
1312559b4296SAlan Somers 				if (error == 0)
1313559b4296SAlan Somers 					break;
1314559b4296SAlan Somers 			}
1315d748f7efSMark Johnston 			if (error != 0)
13164208ea14SHajimu UMEMOTO 				continue;
1317d748f7efSMark Johnston 
1318baf7c373SQing Li 			/*
1319baf7c373SQing Li 			 * This is the case where multiple interfaces
1320baf7c373SQing Li 			 * have the same prefix, but only one is installed
1321baf7c373SQing Li 			 * into the routing table and that prefix entry
1322baf7c373SQing Li 			 * is not the one being examined here. In the case
1323baf7c373SQing Li 			 * where RADIX_MPATH is enabled, multiple route
1324baf7c373SQing Li 			 * entries (of the same rt_key value) will be
1325baf7c373SQing Li 			 * installed because the interface addresses all
1326baf7c373SQing Li 			 * differ.
1327baf7c373SQing Li 			 */
1328baf7c373SQing Li 			if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
13299a1b64d5SAlexander V. Chernikov 			    &rt_key.sin6_addr))
1330baf7c373SQing Li 				continue;
1331baf7c373SQing Li 		}
13324208ea14SHajimu UMEMOTO 
13334208ea14SHajimu UMEMOTO 		if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
1334d748f7efSMark Johnston 		    &addr->sin6_addr, &pr->ndpr_mask)) {
1335d748f7efSMark Johnston 			ND6_RUNLOCK();
13364208ea14SHajimu UMEMOTO 			return (1);
133782cd038dSYoshinobu Inoue 		}
1338d748f7efSMark Johnston 	}
1339d748f7efSMark Johnston 	ND6_RUNLOCK();
13404208ea14SHajimu UMEMOTO 
13414208ea14SHajimu UMEMOTO 	/*
1342743eee66SSUZUKI Shinsuke 	 * If the address is assigned on the node of the other side of
1343743eee66SSUZUKI Shinsuke 	 * a p2p interface, the address should be a neighbor.
1344743eee66SSUZUKI Shinsuke 	 */
1345559b4296SAlan Somers 	if (ifp->if_flags & IFF_POINTOPOINT) {
1346a68cc388SGleb Smirnoff 		struct epoch_tracker et;
1347a68cc388SGleb Smirnoff 
1348a68cc388SGleb Smirnoff 		NET_EPOCH_ENTER(et);
1349d7c5a620SMatt Macy 		CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1350559b4296SAlan Somers 			if (ifa->ifa_addr->sa_family != addr->sin6_family)
1351559b4296SAlan Somers 				continue;
1352559b4296SAlan Somers 			if (ifa->ifa_dstaddr != NULL &&
1353559b4296SAlan Somers 			    sa_equal(addr, ifa->ifa_dstaddr)) {
1354a68cc388SGleb Smirnoff 				NET_EPOCH_EXIT(et);
1355559b4296SAlan Somers 				return 1;
13568c0fec80SRobert Watson 			}
1357559b4296SAlan Somers 		}
1358a68cc388SGleb Smirnoff 		NET_EPOCH_EXIT(et);
13598c0fec80SRobert Watson 	}
1360743eee66SSUZUKI Shinsuke 
1361743eee66SSUZUKI Shinsuke 	/*
13624208ea14SHajimu UMEMOTO 	 * If the default router list is empty, all addresses are regarded
13634208ea14SHajimu UMEMOTO 	 * as on-link, and thus, as a neighbor.
13644208ea14SHajimu UMEMOTO 	 */
1365e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV &&
1366ad675b32SBjoern A. Zeeb 	    nd6_defrouter_list_empty() &&
1367603724d3SBjoern A. Zeeb 	    V_nd6_defifindex == ifp->if_index) {
136882cd038dSYoshinobu Inoue 		return (1);
136982cd038dSYoshinobu Inoue 	}
137082cd038dSYoshinobu Inoue 
137177b691e0SBrian Feldman 	return (0);
137277b691e0SBrian Feldman }
137377b691e0SBrian Feldman 
137477b691e0SBrian Feldman 
137577b691e0SBrian Feldman /*
137677b691e0SBrian Feldman  * Detect if a given IPv6 address identifies a neighbor on a given link.
137777b691e0SBrian Feldman  * XXX: should take care of the destination of a p2p link?
137877b691e0SBrian Feldman  */
137977b691e0SBrian Feldman int
1380f0316e1aSAlexander V. Chernikov nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
138177b691e0SBrian Feldman {
13826e6b3f7cSQing Li 	struct llentry *lle;
13836e6b3f7cSQing Li 	int rc = 0;
138477b691e0SBrian Feldman 
1385b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
13866e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
138777b691e0SBrian Feldman 	if (nd6_is_new_addr_neighbor(addr, ifp))
138877b691e0SBrian Feldman 		return (1);
138977b691e0SBrian Feldman 
139082cd038dSYoshinobu Inoue 	/*
139182cd038dSYoshinobu Inoue 	 * Even if the address matches none of our addresses, it might be
139282cd038dSYoshinobu Inoue 	 * in the neighbor cache.
139382cd038dSYoshinobu Inoue 	 */
13946e6b3f7cSQing Li 	if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) {
13956e6b3f7cSQing Li 		LLE_RUNLOCK(lle);
13966e6b3f7cSQing Li 		rc = 1;
13976e6b3f7cSQing Li 	}
13986e6b3f7cSQing Li 	return (rc);
139982cd038dSYoshinobu Inoue }
140082cd038dSYoshinobu Inoue 
140182cd038dSYoshinobu Inoue /*
140282cd038dSYoshinobu Inoue  * Free an nd6 llinfo entry.
1403743eee66SSUZUKI Shinsuke  * Since the function would cause significant changes in the kernel, DO NOT
1404743eee66SSUZUKI Shinsuke  * make it global, unless you have a strong reason for the change, and are sure
1405743eee66SSUZUKI Shinsuke  * that the change is safe.
1406c0b8aeaeSAlexander V. Chernikov  *
1407c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
140882cd038dSYoshinobu Inoue  */
1409c0b8aeaeSAlexander V. Chernikov static __noinline void
1410435bece4SMark Johnston nd6_free(struct llentry **lnp, int gc)
141182cd038dSYoshinobu Inoue {
1412e6950476SBjoern A. Zeeb 	struct ifnet *ifp;
1413435bece4SMark Johnston 	struct llentry *ln;
1414435bece4SMark Johnston 	struct nd_defrouter *dr;
1415435bece4SMark Johnston 
1416435bece4SMark Johnston 	ln = *lnp;
1417435bece4SMark Johnston 	*lnp = NULL;
1418e6950476SBjoern A. Zeeb 
1419e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
1420435bece4SMark Johnston 	ND6_RLOCK_ASSERT();
1421435bece4SMark Johnston 
1422435bece4SMark Johnston 	ifp = lltable_get_ifp(ln->lle_tbl);
1423435bece4SMark Johnston 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0)
1424435bece4SMark Johnston 		dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp);
1425435bece4SMark Johnston 	else
1426435bece4SMark Johnston 		dr = NULL;
1427435bece4SMark Johnston 	ND6_RUNLOCK();
1428435bece4SMark Johnston 
1429435bece4SMark Johnston 	if ((ln->la_flags & LLE_DELETED) == 0)
1430435bece4SMark Johnston 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
143182cd038dSYoshinobu Inoue 
143282cd038dSYoshinobu Inoue 	/*
143333841545SHajimu UMEMOTO 	 * we used to have pfctlinput(PRC_HOSTDEAD) here.
143433841545SHajimu UMEMOTO 	 * even though it is not harmful, it was not really necessary.
143582cd038dSYoshinobu Inoue 	 */
1436686cdd19SJun-ichiro itojun Hagino 
1437743eee66SSUZUKI Shinsuke 	/* cancel timer */
1438e6950476SBjoern A. Zeeb 	nd6_llinfo_settimer_locked(ln, -1);
1439e6950476SBjoern A. Zeeb 
1440e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1441743eee66SSUZUKI Shinsuke 		if (dr != NULL && dr->expire &&
1442743eee66SSUZUKI Shinsuke 		    ln->ln_state == ND6_LLINFO_STALE && gc) {
1443743eee66SSUZUKI Shinsuke 			/*
1444743eee66SSUZUKI Shinsuke 			 * If the reason for the deletion is just garbage
1445743eee66SSUZUKI Shinsuke 			 * collection, and the neighbor is an active default
1446743eee66SSUZUKI Shinsuke 			 * router, do not delete it.  Instead, reset the GC
1447743eee66SSUZUKI Shinsuke 			 * timer using the router's lifetime.
1448743eee66SSUZUKI Shinsuke 			 * Simply deleting the entry would affect default
1449743eee66SSUZUKI Shinsuke 			 * router selection, which is not necessarily a good
1450743eee66SSUZUKI Shinsuke 			 * thing, especially when we're using router preference
1451743eee66SSUZUKI Shinsuke 			 * values.
1452743eee66SSUZUKI Shinsuke 			 * XXX: the check for ln_state would be redundant,
1453743eee66SSUZUKI Shinsuke 			 *      but we intentionally keep it just in case.
1454743eee66SSUZUKI Shinsuke 			 */
14557d26db17SHiroki Sato 			if (dr->expire > time_uptime)
1456e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
14577d26db17SHiroki Sato 				    (dr->expire - time_uptime) * hz);
1458743eee66SSUZUKI Shinsuke 			else
1459e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
1460e6950476SBjoern A. Zeeb 				    (long)V_nd6_gctimer * hz);
1461e6950476SBjoern A. Zeeb 
1462ef8d671cSHajimu UMEMOTO 			LLE_REMREF(ln);
1463ef8d671cSHajimu UMEMOTO 			LLE_WUNLOCK(ln);
14644de485feSMark Johnston 			defrouter_rele(dr);
1465d3cdb716SAlexander V. Chernikov 			return;
1466743eee66SSUZUKI Shinsuke 		}
1467743eee66SSUZUKI Shinsuke 
1468686cdd19SJun-ichiro itojun Hagino 		if (dr) {
1469686cdd19SJun-ichiro itojun Hagino 			/*
1470686cdd19SJun-ichiro itojun Hagino 			 * Unreachablity of a router might affect the default
1471686cdd19SJun-ichiro itojun Hagino 			 * router selection and on-link detection of advertised
1472686cdd19SJun-ichiro itojun Hagino 			 * prefixes.
1473686cdd19SJun-ichiro itojun Hagino 			 */
1474686cdd19SJun-ichiro itojun Hagino 
1475686cdd19SJun-ichiro itojun Hagino 			/*
1476686cdd19SJun-ichiro itojun Hagino 			 * Temporarily fake the state to choose a new default
1477686cdd19SJun-ichiro itojun Hagino 			 * router and to perform on-link determination of
147888ff5695SSUZUKI Shinsuke 			 * prefixes correctly.
1479686cdd19SJun-ichiro itojun Hagino 			 * Below the state will be set correctly,
1480686cdd19SJun-ichiro itojun Hagino 			 * or the entry itself will be deleted.
1481686cdd19SJun-ichiro itojun Hagino 			 */
1482686cdd19SJun-ichiro itojun Hagino 			ln->ln_state = ND6_LLINFO_INCOMPLETE;
14831d5089c2SBjoern A. Zeeb 		}
1484686cdd19SJun-ichiro itojun Hagino 
14851d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr) {
14861d5089c2SBjoern A. Zeeb 
14871d5089c2SBjoern A. Zeeb 			/*
14881d5089c2SBjoern A. Zeeb 			 * We need to unlock to avoid a LOR with rt6_flush() with the
14891d5089c2SBjoern A. Zeeb 			 * rnh and for the calls to pfxlist_onlink_check() and
1490559b4296SAlan Somers 			 * defrouter_select_fib() in the block further down for calls
14911d5089c2SBjoern A. Zeeb 			 * into nd6_lookup().  We still hold a ref.
14921d5089c2SBjoern A. Zeeb 			 */
14931d5089c2SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
14941d5089c2SBjoern A. Zeeb 
14951d5089c2SBjoern A. Zeeb 			/*
14961d5089c2SBjoern A. Zeeb 			 * rt6_flush must be called whether or not the neighbor
14971d5089c2SBjoern A. Zeeb 			 * is in the Default Router List.
14981d5089c2SBjoern A. Zeeb 			 * See a corresponding comment in nd6_na_input().
14991d5089c2SBjoern A. Zeeb 			 */
1500314294deSAlexander V. Chernikov 			rt6_flush(&ln->r_l3addr.addr6, ifp);
15011d5089c2SBjoern A. Zeeb 		}
15021d5089c2SBjoern A. Zeeb 
15031d5089c2SBjoern A. Zeeb 		if (dr) {
150433841545SHajimu UMEMOTO 			/*
1505559b4296SAlan Somers 			 * Since defrouter_select_fib() does not affect the
150633841545SHajimu UMEMOTO 			 * on-link determination and MIP6 needs the check
150733841545SHajimu UMEMOTO 			 * before the default router selection, we perform
150833841545SHajimu UMEMOTO 			 * the check now.
150933841545SHajimu UMEMOTO 			 */
151033841545SHajimu UMEMOTO 			pfxlist_onlink_check();
151133841545SHajimu UMEMOTO 
1512686cdd19SJun-ichiro itojun Hagino 			/*
15131d5089c2SBjoern A. Zeeb 			 * Refresh default router list.
1514686cdd19SJun-ichiro itojun Hagino 			 */
1515559b4296SAlan Somers 			defrouter_select_fib(dr->ifp->if_fib);
1516686cdd19SJun-ichiro itojun Hagino 		}
15171d5089c2SBjoern A. Zeeb 
151817a03656SEric van Gyzen 		/*
151917a03656SEric van Gyzen 		 * If this entry was added by an on-link redirect, remove the
152017a03656SEric van Gyzen 		 * corresponding host route.
152117a03656SEric van Gyzen 		 */
152217a03656SEric van Gyzen 		if (ln->la_flags & LLE_REDIRECT)
152317a03656SEric van Gyzen 			nd6_free_redirect(ln);
152417a03656SEric van Gyzen 
15251d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr)
15261d5089c2SBjoern A. Zeeb 			LLE_WLOCK(ln);
152782cd038dSYoshinobu Inoue 	}
152882cd038dSYoshinobu Inoue 
152933841545SHajimu UMEMOTO 	/*
1530e6950476SBjoern A. Zeeb 	 * Save to unlock. We still hold an extra reference and will not
1531e6950476SBjoern A. Zeeb 	 * free(9) in llentry_free() if someone else holds one as well.
1532e6950476SBjoern A. Zeeb 	 */
1533e6950476SBjoern A. Zeeb 	LLE_WUNLOCK(ln);
15346e6b3f7cSQing Li 	IF_AFDATA_LOCK(ifp);
15356e6b3f7cSQing Li 	LLE_WLOCK(ln);
1536b1ec2940SGleb Smirnoff 	/* Guard against race with other llentry_free(). */
1537b1ec2940SGleb Smirnoff 	if (ln->la_flags & LLE_LINKED) {
1538d3cdb716SAlexander V. Chernikov 		/* Remove callout reference */
1539becba438SBjoern A. Zeeb 		LLE_REMREF(ln);
1540d3cdb716SAlexander V. Chernikov 		lltable_unlink_entry(ln->lle_tbl, ln);
1541d3cdb716SAlexander V. Chernikov 	}
15426e6b3f7cSQing Li 	IF_AFDATA_UNLOCK(ifp);
154333841545SHajimu UMEMOTO 
1544d3cdb716SAlexander V. Chernikov 	llentry_free(ln);
15454de485feSMark Johnston 	if (dr != NULL)
15464de485feSMark Johnston 		defrouter_rele(dr);
154782cd038dSYoshinobu Inoue }
154882cd038dSYoshinobu Inoue 
1549e8b0643eSAlexander V. Chernikov static int
1550539642a2SAlexander V. Chernikov nd6_isdynrte(const struct rtentry *rt, const struct nhop_object *nh, void *xap)
1551e8b0643eSAlexander V. Chernikov {
1552e8b0643eSAlexander V. Chernikov 
1553539642a2SAlexander V. Chernikov 	if (nh->nh_flags & NHF_REDIRECT)
1554e8b0643eSAlexander V. Chernikov 		return (1);
1555e8b0643eSAlexander V. Chernikov 
1556e8b0643eSAlexander V. Chernikov 	return (0);
1557e8b0643eSAlexander V. Chernikov }
1558539642a2SAlexander V. Chernikov 
155982cd038dSYoshinobu Inoue /*
156017a03656SEric van Gyzen  * Remove the rtentry for the given llentry,
156117a03656SEric van Gyzen  * both of which were installed by a redirect.
156217a03656SEric van Gyzen  */
156317a03656SEric van Gyzen static void
156417a03656SEric van Gyzen nd6_free_redirect(const struct llentry *ln)
156517a03656SEric van Gyzen {
156617a03656SEric van Gyzen 	int fibnum;
156717a03656SEric van Gyzen 	struct sockaddr_in6 sin6;
1568e8b0643eSAlexander V. Chernikov 	struct rt_addrinfo info;
1569*2bbab0afSAlexander V. Chernikov 	struct epoch_tracker et;
157017a03656SEric van Gyzen 
157117a03656SEric van Gyzen 	lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6);
1572e8b0643eSAlexander V. Chernikov 	memset(&info, 0, sizeof(info));
1573e8b0643eSAlexander V. Chernikov 	info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6;
1574e8b0643eSAlexander V. Chernikov 	info.rti_filter = nd6_isdynrte;
157517a03656SEric van Gyzen 
1576*2bbab0afSAlexander V. Chernikov 	NET_EPOCH_ENTER(et);
1577e8b0643eSAlexander V. Chernikov 	for (fibnum = 0; fibnum < rt_numfibs; fibnum++)
1578e8b0643eSAlexander V. Chernikov 		rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum);
1579*2bbab0afSAlexander V. Chernikov 	NET_EPOCH_EXIT(et);
158017a03656SEric van Gyzen }
158117a03656SEric van Gyzen 
158217a03656SEric van Gyzen /*
15830f1aca65SQing Li  * Rejuvenate this function for routing operations related
15840f1aca65SQing Li  * processing.
15850f1aca65SQing Li  */
15860f1aca65SQing Li void
158774787ef4SAlexander V. Chernikov nd6_rtrequest(int req, struct rtentry *rt, struct nhop_object *nh,
158874787ef4SAlexander V. Chernikov     struct rt_addrinfo *info)
15890f1aca65SQing Li {
159039e19560SBjoern A. Zeeb 	struct sockaddr_in6 *gateway;
15910f1aca65SQing Li 	struct nd_defrouter *dr;
15920f1aca65SQing Li 
1593aaad3c4fSAlexander V. Chernikov 	gateway = &nh->gw6_sa;
15940f1aca65SQing Li 
15950f1aca65SQing Li 	switch (req) {
15960f1aca65SQing Li 	case RTM_ADD:
15970f1aca65SQing Li 		break;
15980f1aca65SQing Li 
15990f1aca65SQing Li 	case RTM_DELETE:
16000f1aca65SQing Li 		/*
16010f1aca65SQing Li 		 * Only indirect routes are interesting.
16020f1aca65SQing Li 		 */
1603aaad3c4fSAlexander V. Chernikov 		if ((nh->nh_flags & NHF_GATEWAY) == 0)
16040f1aca65SQing Li 			return;
16050f1aca65SQing Li 		/*
16060f1aca65SQing Li 		 * check for default route
16070f1aca65SQing Li 		 */
1608aaad3c4fSAlexander V. Chernikov 		if (nh->nh_flags & NHF_DEFAULT) {
1609aaad3c4fSAlexander V. Chernikov 			dr = defrouter_lookup(&gateway->sin6_addr, nh->nh_ifp);
16104de485feSMark Johnston 			if (dr != NULL) {
16110f1aca65SQing Li 				dr->installed = 0;
16124de485feSMark Johnston 				defrouter_rele(dr);
16134de485feSMark Johnston 			}
16140f1aca65SQing Li 		}
16150f1aca65SQing Li 		break;
16160f1aca65SQing Li 	}
16170f1aca65SQing Li }
16180f1aca65SQing Li 
16190f1aca65SQing Li 
162082cd038dSYoshinobu Inoue int
16211272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
162282cd038dSYoshinobu Inoue {
162382cd038dSYoshinobu Inoue 	struct in6_ndireq *ndi = (struct in6_ndireq *)data;
162482cd038dSYoshinobu Inoue 	struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data;
1625686cdd19SJun-ichiro itojun Hagino 	struct in6_ndifreq *ndif = (struct in6_ndifreq *)data;
1626a68cc388SGleb Smirnoff 	struct epoch_tracker et;
1627d0bec2c5SHiroki Sato 	int error = 0;
162882cd038dSYoshinobu Inoue 
16290de0dd9bSHiroki Sato 	if (ifp->if_afdata[AF_INET6] == NULL)
16300de0dd9bSHiroki Sato 		return (EPFNOSUPPORT);
163182cd038dSYoshinobu Inoue 	switch (cmd) {
163233841545SHajimu UMEMOTO 	case OSIOCGIFINFO_IN6:
16332ce62dceSSUZUKI Shinsuke #define ND	ndi->ndi
163431b1bfe1SHajimu UMEMOTO 		/* XXX: old ndp(8) assumes a positive value for linkmtu. */
16352ce62dceSSUZUKI Shinsuke 		bzero(&ND, sizeof(ND));
16362ce62dceSSUZUKI Shinsuke 		ND.linkmtu = IN6_LINKMTU(ifp);
16372ce62dceSSUZUKI Shinsuke 		ND.maxmtu = ND_IFINFO(ifp)->maxmtu;
16382ce62dceSSUZUKI Shinsuke 		ND.basereachable = ND_IFINFO(ifp)->basereachable;
16392ce62dceSSUZUKI Shinsuke 		ND.reachable = ND_IFINFO(ifp)->reachable;
16402ce62dceSSUZUKI Shinsuke 		ND.retrans = ND_IFINFO(ifp)->retrans;
16412ce62dceSSUZUKI Shinsuke 		ND.flags = ND_IFINFO(ifp)->flags;
16422ce62dceSSUZUKI Shinsuke 		ND.recalctm = ND_IFINFO(ifp)->recalctm;
16432ce62dceSSUZUKI Shinsuke 		ND.chlim = ND_IFINFO(ifp)->chlim;
164433841545SHajimu UMEMOTO 		break;
164582cd038dSYoshinobu Inoue 	case SIOCGIFINFO_IN6:
16462ce62dceSSUZUKI Shinsuke 		ND = *ND_IFINFO(ifp);
164782cd038dSYoshinobu Inoue 		break;
1648b9204379SSUZUKI Shinsuke 	case SIOCSIFINFO_IN6:
1649b9204379SSUZUKI Shinsuke 		/*
1650b9204379SSUZUKI Shinsuke 		 * used to change host variables from userland.
1651a4641f4eSPedro F. Giffuni 		 * intended for a use on router to reflect RA configurations.
1652b9204379SSUZUKI Shinsuke 		 */
1653b9204379SSUZUKI Shinsuke 		/* 0 means 'unspecified' */
1654b9204379SSUZUKI Shinsuke 		if (ND.linkmtu != 0) {
1655b9204379SSUZUKI Shinsuke 			if (ND.linkmtu < IPV6_MMTU ||
1656b9204379SSUZUKI Shinsuke 			    ND.linkmtu > IN6_LINKMTU(ifp)) {
1657b9204379SSUZUKI Shinsuke 				error = EINVAL;
1658b9204379SSUZUKI Shinsuke 				break;
1659b9204379SSUZUKI Shinsuke 			}
1660b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->linkmtu = ND.linkmtu;
1661b9204379SSUZUKI Shinsuke 		}
1662b9204379SSUZUKI Shinsuke 
1663b9204379SSUZUKI Shinsuke 		if (ND.basereachable != 0) {
1664b9204379SSUZUKI Shinsuke 			int obasereachable = ND_IFINFO(ifp)->basereachable;
1665b9204379SSUZUKI Shinsuke 
1666b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->basereachable = ND.basereachable;
1667b9204379SSUZUKI Shinsuke 			if (ND.basereachable != obasereachable)
1668b9204379SSUZUKI Shinsuke 				ND_IFINFO(ifp)->reachable =
1669b9204379SSUZUKI Shinsuke 				    ND_COMPUTE_RTIME(ND.basereachable);
1670b9204379SSUZUKI Shinsuke 		}
1671b9204379SSUZUKI Shinsuke 		if (ND.retrans != 0)
1672b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->retrans = ND.retrans;
1673b9204379SSUZUKI Shinsuke 		if (ND.chlim != 0)
1674b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->chlim = ND.chlim;
1675b9204379SSUZUKI Shinsuke 		/* FALLTHROUGH */
1676686cdd19SJun-ichiro itojun Hagino 	case SIOCSIFINFO_FLAGS:
1677a283298cSHiroki Sato 	{
1678a283298cSHiroki Sato 		struct ifaddr *ifa;
1679a283298cSHiroki Sato 		struct in6_ifaddr *ia;
1680a283298cSHiroki Sato 
1681a283298cSHiroki Sato 		if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1682a283298cSHiroki Sato 		    !(ND.flags & ND6_IFF_IFDISABLED)) {
1683a283298cSHiroki Sato 			/* ifdisabled 1->0 transision */
1684a283298cSHiroki Sato 
1685a283298cSHiroki Sato 			/*
1686a283298cSHiroki Sato 			 * If the interface is marked as ND6_IFF_IFDISABLED and
1687a283298cSHiroki Sato 			 * has an link-local address with IN6_IFF_DUPLICATED,
1688a283298cSHiroki Sato 			 * do not clear ND6_IFF_IFDISABLED.
1689a283298cSHiroki Sato 			 * See RFC 4862, Section 5.4.5.
1690a283298cSHiroki Sato 			 */
1691ef2e580eSGleb Smirnoff 			NET_EPOCH_ENTER(et);
1692d7c5a620SMatt Macy 			CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1693a283298cSHiroki Sato 				if (ifa->ifa_addr->sa_family != AF_INET6)
1694a283298cSHiroki Sato 					continue;
1695a283298cSHiroki Sato 				ia = (struct in6_ifaddr *)ifa;
1696a283298cSHiroki Sato 				if ((ia->ia6_flags & IN6_IFF_DUPLICATED) &&
1697d0bec2c5SHiroki Sato 				    IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
1698a283298cSHiroki Sato 					break;
1699a283298cSHiroki Sato 			}
1700ef2e580eSGleb Smirnoff 			NET_EPOCH_EXIT(et);
1701a283298cSHiroki Sato 
1702d0bec2c5SHiroki Sato 			if (ifa != NULL) {
1703d0bec2c5SHiroki Sato 				/* LLA is duplicated. */
1704a283298cSHiroki Sato 				ND.flags |= ND6_IFF_IFDISABLED;
1705a283298cSHiroki Sato 				log(LOG_ERR, "Cannot enable an interface"
1706a283298cSHiroki Sato 				    " with a link-local address marked"
1707a283298cSHiroki Sato 				    " duplicate.\n");
1708a283298cSHiroki Sato 			} else {
1709a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED;
1710154d5f73SHiroki Sato 				if (ifp->if_flags & IFF_UP)
1711a283298cSHiroki Sato 					in6_if_up(ifp);
1712a283298cSHiroki Sato 			}
1713a283298cSHiroki Sato 		} else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1714a283298cSHiroki Sato 			    (ND.flags & ND6_IFF_IFDISABLED)) {
1715a283298cSHiroki Sato 			/* ifdisabled 0->1 transision */
1716a283298cSHiroki Sato 			/* Mark all IPv6 address as tentative. */
1717a283298cSHiroki Sato 
1718a283298cSHiroki Sato 			ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
17196401c828SHiroki Sato 			if (V_ip6_dad_count > 0 &&
17206401c828SHiroki Sato 			    (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) {
1721ef2e580eSGleb Smirnoff 				NET_EPOCH_ENTER(et);
1722d7c5a620SMatt Macy 				CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead,
1723d0bec2c5SHiroki Sato 				    ifa_link) {
1724d0bec2c5SHiroki Sato 					if (ifa->ifa_addr->sa_family !=
1725d0bec2c5SHiroki Sato 					    AF_INET6)
1726a283298cSHiroki Sato 						continue;
1727a283298cSHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
1728a283298cSHiroki Sato 					ia->ia6_flags |= IN6_IFF_TENTATIVE;
1729a283298cSHiroki Sato 				}
1730ef2e580eSGleb Smirnoff 				NET_EPOCH_EXIT(et);
1731a283298cSHiroki Sato 			}
1732d0bec2c5SHiroki Sato 		}
1733a283298cSHiroki Sato 
1734154d5f73SHiroki Sato 		if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) {
1735154d5f73SHiroki Sato 			if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) {
1736a283298cSHiroki Sato 				/* auto_linklocal 0->1 transision */
1737a283298cSHiroki Sato 
1738a283298cSHiroki Sato 				/* If no link-local address on ifp, configure */
1739a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL;
1740a283298cSHiroki Sato 				in6_ifattach(ifp, NULL);
1741154d5f73SHiroki Sato 			} else if (!(ND.flags & ND6_IFF_IFDISABLED) &&
1742154d5f73SHiroki Sato 			    ifp->if_flags & IFF_UP) {
174377bc4985SHiroki Sato 				/*
174477bc4985SHiroki Sato 				 * When the IF already has
1745154d5f73SHiroki Sato 				 * ND6_IFF_AUTO_LINKLOCAL, no link-local
1746154d5f73SHiroki Sato 				 * address is assigned, and IFF_UP, try to
1747154d5f73SHiroki Sato 				 * assign one.
174877bc4985SHiroki Sato 				 */
1749ef2e580eSGleb Smirnoff 				NET_EPOCH_ENTER(et);
1750d7c5a620SMatt Macy 				CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead,
1751d0bec2c5SHiroki Sato 				    ifa_link) {
1752d0bec2c5SHiroki Sato 					if (ifa->ifa_addr->sa_family !=
1753d0bec2c5SHiroki Sato 					    AF_INET6)
175477bc4985SHiroki Sato 						continue;
175577bc4985SHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
1756d0bec2c5SHiroki Sato 					if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
175777bc4985SHiroki Sato 						break;
175877bc4985SHiroki Sato 				}
1759ef2e580eSGleb Smirnoff 				NET_EPOCH_EXIT(et);
1760d0bec2c5SHiroki Sato 				if (ifa != NULL)
1761d0bec2c5SHiroki Sato 					/* No LLA is configured. */
176277bc4985SHiroki Sato 					in6_ifattach(ifp, NULL);
1763a283298cSHiroki Sato 			}
1764a283298cSHiroki Sato 		}
17652ce62dceSSUZUKI Shinsuke 		ND_IFINFO(ifp)->flags = ND.flags;
1766686cdd19SJun-ichiro itojun Hagino 		break;
1767b8a6e03fSGleb Smirnoff 	}
17682ce62dceSSUZUKI Shinsuke #undef ND
1769686cdd19SJun-ichiro itojun Hagino 	case SIOCSNDFLUSH_IN6:	/* XXX: the ioctl name is confusing... */
1770743eee66SSUZUKI Shinsuke 		/* sync kernel routing table with the default router list */
1771743eee66SSUZUKI Shinsuke 		defrouter_reset();
1772808c432fSBjoern A. Zeeb 		defrouter_select_fib(RT_ALL_FIBS);
177382cd038dSYoshinobu Inoue 		break;
177482cd038dSYoshinobu Inoue 	case SIOCSPFXFLUSH_IN6:
177582cd038dSYoshinobu Inoue 	{
177682cd038dSYoshinobu Inoue 		/* flush all the prefix advertised by routers */
177733841545SHajimu UMEMOTO 		struct in6_ifaddr *ia, *ia_next;
1778d748f7efSMark Johnston 		struct nd_prefix *pr, *next;
1779d748f7efSMark Johnston 		struct nd_prhead prl;
178033841545SHajimu UMEMOTO 
1781d748f7efSMark Johnston 		LIST_INIT(&prl);
1782d748f7efSMark Johnston 
1783d748f7efSMark Johnston 		ND6_WLOCK();
1784d748f7efSMark Johnston 		LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) {
178533841545SHajimu UMEMOTO 			if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
178633841545SHajimu UMEMOTO 				continue; /* XXX */
1787d748f7efSMark Johnston 			nd6_prefix_unlink(pr, &prl);
1788d748f7efSMark Johnston 		}
1789d748f7efSMark Johnston 		ND6_WUNLOCK();
179033841545SHajimu UMEMOTO 
1791d748f7efSMark Johnston 		while ((pr = LIST_FIRST(&prl)) != NULL) {
1792d748f7efSMark Johnston 			LIST_REMOVE(pr, ndpr_entry);
1793d1da0a06SRobert Watson 			/* XXXRW: in6_ifaddrhead locking. */
1794d7c5a620SMatt Macy 			CK_STAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link,
179580af0152SRobert Watson 			    ia_next) {
179633841545SHajimu UMEMOTO 				if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
179733841545SHajimu UMEMOTO 					continue;
179833841545SHajimu UMEMOTO 
179933841545SHajimu UMEMOTO 				if (ia->ia6_ndpr == pr)
180033841545SHajimu UMEMOTO 					in6_purgeaddr(&ia->ia_ifa);
180133841545SHajimu UMEMOTO 			}
1802d748f7efSMark Johnston 			nd6_prefix_del(pr);
180382cd038dSYoshinobu Inoue 		}
180482cd038dSYoshinobu Inoue 		break;
180582cd038dSYoshinobu Inoue 	}
180682cd038dSYoshinobu Inoue 	case SIOCSRTRFLUSH_IN6:
180782cd038dSYoshinobu Inoue 	{
180882cd038dSYoshinobu Inoue 		/* flush all the default routers */
180982cd038dSYoshinobu Inoue 
1810743eee66SSUZUKI Shinsuke 		defrouter_reset();
1811ad675b32SBjoern A. Zeeb 		nd6_defrouter_flush_all();
1812808c432fSBjoern A. Zeeb 		defrouter_select_fib(RT_ALL_FIBS);
181382cd038dSYoshinobu Inoue 		break;
181482cd038dSYoshinobu Inoue 	}
181582cd038dSYoshinobu Inoue 	case SIOCGNBRINFO_IN6:
181682cd038dSYoshinobu Inoue 	{
18176e6b3f7cSQing Li 		struct llentry *ln;
181882cd038dSYoshinobu Inoue 		struct in6_addr nb_addr = nbi->addr; /* make local for safety */
181982cd038dSYoshinobu Inoue 
1820a1f7e5f8SHajimu UMEMOTO 		if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0)
1821a1f7e5f8SHajimu UMEMOTO 			return (error);
182282cd038dSYoshinobu Inoue 
1823a68cc388SGleb Smirnoff 		NET_EPOCH_ENTER(et);
18246e6b3f7cSQing Li 		ln = nd6_lookup(&nb_addr, 0, ifp);
1825a68cc388SGleb Smirnoff 		NET_EPOCH_EXIT(et);
18266e6b3f7cSQing Li 
18276e6b3f7cSQing Li 		if (ln == NULL) {
182882cd038dSYoshinobu Inoue 			error = EINVAL;
182982cd038dSYoshinobu Inoue 			break;
183082cd038dSYoshinobu Inoue 		}
183182cd038dSYoshinobu Inoue 		nbi->state = ln->ln_state;
18326e6b3f7cSQing Li 		nbi->asked = ln->la_asked;
183382cd038dSYoshinobu Inoue 		nbi->isrouter = ln->ln_router;
18345a041915SHiroki Sato 		if (ln->la_expire == 0)
18355a041915SHiroki Sato 			nbi->expire = 0;
18365a041915SHiroki Sato 		else
1837427c2f4eSAlexander V. Chernikov 			nbi->expire = ln->la_expire + ln->lle_remtime / hz +
18385a041915SHiroki Sato 			    (time_second - time_uptime);
18396e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
184082cd038dSYoshinobu Inoue 		break;
184182cd038dSYoshinobu Inoue 	}
1842686cdd19SJun-ichiro itojun Hagino 	case SIOCGDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1843603724d3SBjoern A. Zeeb 		ndif->ifindex = V_nd6_defifindex;
1844686cdd19SJun-ichiro itojun Hagino 		break;
1845686cdd19SJun-ichiro itojun Hagino 	case SIOCSDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1846686cdd19SJun-ichiro itojun Hagino 		return (nd6_setdefaultiface(ndif->ifindex));
184782cd038dSYoshinobu Inoue 	}
184882cd038dSYoshinobu Inoue 	return (error);
184982cd038dSYoshinobu Inoue }
185082cd038dSYoshinobu Inoue 
185182cd038dSYoshinobu Inoue /*
18520e2dcee6SAlexander V. Chernikov  * Calculates new isRouter value based on provided parameters and
18530e2dcee6SAlexander V. Chernikov  * returns it.
18540e2dcee6SAlexander V. Chernikov  */
18550e2dcee6SAlexander V. Chernikov static int
18560e2dcee6SAlexander V. Chernikov nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr,
18570e2dcee6SAlexander V. Chernikov     int ln_router)
18580e2dcee6SAlexander V. Chernikov {
18590e2dcee6SAlexander V. Chernikov 
18600e2dcee6SAlexander V. Chernikov 	/*
18610e2dcee6SAlexander V. Chernikov 	 * ICMP6 type dependent behavior.
18620e2dcee6SAlexander V. Chernikov 	 *
18630e2dcee6SAlexander V. Chernikov 	 * NS: clear IsRouter if new entry
18640e2dcee6SAlexander V. Chernikov 	 * RS: clear IsRouter
18650e2dcee6SAlexander V. Chernikov 	 * RA: set IsRouter if there's lladdr
18660e2dcee6SAlexander V. Chernikov 	 * redir: clear IsRouter if new entry
18670e2dcee6SAlexander V. Chernikov 	 *
18680e2dcee6SAlexander V. Chernikov 	 * RA case, (1):
18690e2dcee6SAlexander V. Chernikov 	 * The spec says that we must set IsRouter in the following cases:
18700e2dcee6SAlexander V. Chernikov 	 * - If lladdr exist, set IsRouter.  This means (1-5).
18710e2dcee6SAlexander V. Chernikov 	 * - If it is old entry (!newentry), set IsRouter.  This means (7).
18720e2dcee6SAlexander V. Chernikov 	 * So, based on the spec, in (1-5) and (7) cases we must set IsRouter.
18730e2dcee6SAlexander V. Chernikov 	 * A quetion arises for (1) case.  (1) case has no lladdr in the
18740e2dcee6SAlexander V. Chernikov 	 * neighbor cache, this is similar to (6).
18750e2dcee6SAlexander V. Chernikov 	 * This case is rare but we figured that we MUST NOT set IsRouter.
18760e2dcee6SAlexander V. Chernikov 	 *
187741a31e78SAlexander V. Chernikov 	 *   is_new  old_addr new_addr 	    NS  RS  RA	redir
18780e2dcee6SAlexander V. Chernikov 	 *							D R
187941a31e78SAlexander V. Chernikov 	 *	0	n	n	(1)	c   ?     s
188041a31e78SAlexander V. Chernikov 	 *	0	y	n	(2)	c   s     s
188141a31e78SAlexander V. Chernikov 	 *	0	n	y	(3)	c   s     s
188241a31e78SAlexander V. Chernikov 	 *	0	y	y	(4)	c   s     s
188341a31e78SAlexander V. Chernikov 	 *	0	y	y	(5)	c   s     s
188441a31e78SAlexander V. Chernikov 	 *	1	--	n	(6) c	c	c s
188541a31e78SAlexander V. Chernikov 	 *	1	--	y	(7) c	c   s	c s
18860e2dcee6SAlexander V. Chernikov 	 *
18870e2dcee6SAlexander V. Chernikov 	 *					(c=clear s=set)
18880e2dcee6SAlexander V. Chernikov 	 */
18890e2dcee6SAlexander V. Chernikov 	switch (type & 0xff) {
18900e2dcee6SAlexander V. Chernikov 	case ND_NEIGHBOR_SOLICIT:
18910e2dcee6SAlexander V. Chernikov 		/*
18920e2dcee6SAlexander V. Chernikov 		 * New entry must have is_router flag cleared.
18930e2dcee6SAlexander V. Chernikov 		 */
18940e2dcee6SAlexander V. Chernikov 		if (is_new)					/* (6-7) */
18950e2dcee6SAlexander V. Chernikov 			ln_router = 0;
18960e2dcee6SAlexander V. Chernikov 		break;
18970e2dcee6SAlexander V. Chernikov 	case ND_REDIRECT:
18980e2dcee6SAlexander V. Chernikov 		/*
18990e2dcee6SAlexander V. Chernikov 		 * If the icmp is a redirect to a better router, always set the
19000e2dcee6SAlexander V. Chernikov 		 * is_router flag.  Otherwise, if the entry is newly created,
19010e2dcee6SAlexander V. Chernikov 		 * clear the flag.  [RFC 2461, sec 8.3]
19020e2dcee6SAlexander V. Chernikov 		 */
19030e2dcee6SAlexander V. Chernikov 		if (code == ND_REDIRECT_ROUTER)
19040e2dcee6SAlexander V. Chernikov 			ln_router = 1;
19050e2dcee6SAlexander V. Chernikov 		else {
19060e2dcee6SAlexander V. Chernikov 			if (is_new)				/* (6-7) */
19070e2dcee6SAlexander V. Chernikov 				ln_router = 0;
19080e2dcee6SAlexander V. Chernikov 		}
19090e2dcee6SAlexander V. Chernikov 		break;
19100e2dcee6SAlexander V. Chernikov 	case ND_ROUTER_SOLICIT:
19110e2dcee6SAlexander V. Chernikov 		/*
19120e2dcee6SAlexander V. Chernikov 		 * is_router flag must always be cleared.
19130e2dcee6SAlexander V. Chernikov 		 */
19140e2dcee6SAlexander V. Chernikov 		ln_router = 0;
19150e2dcee6SAlexander V. Chernikov 		break;
19160e2dcee6SAlexander V. Chernikov 	case ND_ROUTER_ADVERT:
19170e2dcee6SAlexander V. Chernikov 		/*
19180e2dcee6SAlexander V. Chernikov 		 * Mark an entry with lladdr as a router.
19190e2dcee6SAlexander V. Chernikov 		 */
19200e2dcee6SAlexander V. Chernikov 		if ((!is_new && (old_addr || new_addr)) ||	/* (2-5) */
19210e2dcee6SAlexander V. Chernikov 		    (is_new && new_addr)) {			/* (7) */
19220e2dcee6SAlexander V. Chernikov 			ln_router = 1;
19230e2dcee6SAlexander V. Chernikov 		}
19240e2dcee6SAlexander V. Chernikov 		break;
19250e2dcee6SAlexander V. Chernikov 	}
19260e2dcee6SAlexander V. Chernikov 
19270e2dcee6SAlexander V. Chernikov 	return (ln_router);
19280e2dcee6SAlexander V. Chernikov }
19290e2dcee6SAlexander V. Chernikov 
19300e2dcee6SAlexander V. Chernikov /*
193182cd038dSYoshinobu Inoue  * Create neighbor cache entry and cache link-layer address,
193282cd038dSYoshinobu Inoue  * on reception of inbound ND6 packets.  (RS/RA/NS/redirect)
19331272577eSXin LI  *
19341272577eSXin LI  * type - ICMP6 type
19351272577eSXin LI  * code - type dependent information
19366e6b3f7cSQing Li  *
193782cd038dSYoshinobu Inoue  */
19380e2dcee6SAlexander V. Chernikov void
19391272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr,
19401272577eSXin LI     int lladdrlen, int type, int code)
194182cd038dSYoshinobu Inoue {
19425a255516SAlexander V. Chernikov 	struct llentry *ln = NULL, *ln_tmp;
194382cd038dSYoshinobu Inoue 	int is_newentry;
194482cd038dSYoshinobu Inoue 	int do_update;
194582cd038dSYoshinobu Inoue 	int olladdr;
194682cd038dSYoshinobu Inoue 	int llchange;
194768352503SBjoern A. Zeeb 	int flags;
19483d3728e9SQing Li 	uint16_t router = 0;
19496e6b3f7cSQing Li 	struct sockaddr_in6 sin6;
1950fd14c50bSKip Macy 	struct mbuf *chain = NULL;
19514fb3a820SAlexander V. Chernikov 	u_char linkhdr[LLE_MAX_LINKHDR];
19524fb3a820SAlexander V. Chernikov 	size_t linkhdrsize;
19534fb3a820SAlexander V. Chernikov 	int lladdr_off;
19546e6b3f7cSQing Li 
1955b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
19566e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
195782cd038dSYoshinobu Inoue 
195839e19560SBjoern A. Zeeb 	KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__));
195939e19560SBjoern A. Zeeb 	KASSERT(from != NULL, ("%s: from == NULL", __func__));
196082cd038dSYoshinobu Inoue 
196182cd038dSYoshinobu Inoue 	/* nothing must be updated for unspecified address */
196282cd038dSYoshinobu Inoue 	if (IN6_IS_ADDR_UNSPECIFIED(from))
19630e2dcee6SAlexander V. Chernikov 		return;
196482cd038dSYoshinobu Inoue 
196582cd038dSYoshinobu Inoue 	/*
196682cd038dSYoshinobu Inoue 	 * Validation about ifp->if_addrlen and lladdrlen must be done in
196782cd038dSYoshinobu Inoue 	 * the caller.
196882cd038dSYoshinobu Inoue 	 *
196982cd038dSYoshinobu Inoue 	 * XXX If the link does not have link-layer adderss, what should
197082cd038dSYoshinobu Inoue 	 * we do? (ifp->if_addrlen == 0)
197182cd038dSYoshinobu Inoue 	 * Spec says nothing in sections for RA, RS and NA.  There's small
197282cd038dSYoshinobu Inoue 	 * description on it in NS section (RFC 2461 7.2.3).
197382cd038dSYoshinobu Inoue 	 */
1974f506d933SAlexander V. Chernikov 	flags = lladdr ? LLE_EXCLUSIVE : 0;
19756e6b3f7cSQing Li 	ln = nd6_lookup(from, flags, ifp);
19765a255516SAlexander V. Chernikov 	is_newentry = 0;
19776e6b3f7cSQing Li 	if (ln == NULL) {
1978f506d933SAlexander V. Chernikov 		flags |= LLE_EXCLUSIVE;
19795a255516SAlexander V. Chernikov 		ln = nd6_alloc(from, 0, ifp);
19805a255516SAlexander V. Chernikov 		if (ln == NULL)
19810e2dcee6SAlexander V. Chernikov 			return;
1982501adf01SAlexander V. Chernikov 
1983501adf01SAlexander V. Chernikov 		/*
1984501adf01SAlexander V. Chernikov 		 * Since we already know all the data for the new entry,
1985501adf01SAlexander V. Chernikov 		 * fill it before insertion.
1986501adf01SAlexander V. Chernikov 		 */
19874fb3a820SAlexander V. Chernikov 		if (lladdr != NULL) {
19884fb3a820SAlexander V. Chernikov 			linkhdrsize = sizeof(linkhdr);
19894fb3a820SAlexander V. Chernikov 			if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
19904fb3a820SAlexander V. Chernikov 			    linkhdr, &linkhdrsize, &lladdr_off) != 0)
19914fb3a820SAlexander V. Chernikov 				return;
19924fb3a820SAlexander V. Chernikov 			lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
19934fb3a820SAlexander V. Chernikov 			    lladdr_off);
19944fb3a820SAlexander V. Chernikov 		}
19954fb3a820SAlexander V. Chernikov 
19965a255516SAlexander V. Chernikov 		IF_AFDATA_WLOCK(ifp);
19975a255516SAlexander V. Chernikov 		LLE_WLOCK(ln);
19985a255516SAlexander V. Chernikov 		/* Prefer any existing lle over newly-created one */
1999f506d933SAlexander V. Chernikov 		ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp);
20005a255516SAlexander V. Chernikov 		if (ln_tmp == NULL)
20015a255516SAlexander V. Chernikov 			lltable_link_entry(LLTABLE6(ifp), ln);
20025a255516SAlexander V. Chernikov 		IF_AFDATA_WUNLOCK(ifp);
20031496229aSAlexander V. Chernikov 		if (ln_tmp == NULL) {
2004ab415c83SAlexander V. Chernikov 			/* No existing lle, mark as new entry (6,7) */
200582cd038dSYoshinobu Inoue 			is_newentry = 1;
2006f8116f39SEric van Gyzen 			if (lladdr != NULL) {	/* (7) */
2007aa5f023eSAlexander V. Chernikov 				nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
2008ab415c83SAlexander V. Chernikov 				EVENTHANDLER_INVOKE(lle_event, ln,
2009ab415c83SAlexander V. Chernikov 				    LLENTRY_RESOLVED);
2010f8116f39SEric van Gyzen 			}
20111496229aSAlexander V. Chernikov 		} else {
20125a255516SAlexander V. Chernikov 			lltable_free_entry(LLTABLE6(ifp), ln);
20135a255516SAlexander V. Chernikov 			ln = ln_tmp;
20145a255516SAlexander V. Chernikov 			ln_tmp = NULL;
20155a255516SAlexander V. Chernikov 		}
20165a255516SAlexander V. Chernikov 	}
201733841545SHajimu UMEMOTO 	/* do nothing if static ndp is set */
20185a255516SAlexander V. Chernikov 	if ((ln->la_flags & LLE_STATIC)) {
2019f506d933SAlexander V. Chernikov 		if (flags & LLE_EXCLUSIVE)
20200e2dcee6SAlexander V. Chernikov 			LLE_WUNLOCK(ln);
20210e2dcee6SAlexander V. Chernikov 		else
20220e2dcee6SAlexander V. Chernikov 			LLE_RUNLOCK(ln);
20230e2dcee6SAlexander V. Chernikov 		return;
20243d3728e9SQing Li 	}
202582cd038dSYoshinobu Inoue 
20266e6b3f7cSQing Li 	olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0;
202782cd038dSYoshinobu Inoue 	if (olladdr && lladdr) {
20284fb3a820SAlexander V. Chernikov 		llchange = bcmp(lladdr, ln->ll_addr,
20296e6b3f7cSQing Li 		    ifp->if_addrlen);
203041a31e78SAlexander V. Chernikov 	} else if (!olladdr && lladdr)
203141a31e78SAlexander V. Chernikov 		llchange = 1;
203241a31e78SAlexander V. Chernikov 	else
203382cd038dSYoshinobu Inoue 		llchange = 0;
203482cd038dSYoshinobu Inoue 
203582cd038dSYoshinobu Inoue 	/*
203682cd038dSYoshinobu Inoue 	 * newentry olladdr  lladdr  llchange	(*=record)
203782cd038dSYoshinobu Inoue 	 *	0	n	n	--	(1)
203882cd038dSYoshinobu Inoue 	 *	0	y	n	--	(2)
203941a31e78SAlexander V. Chernikov 	 *	0	n	y	y	(3) * STALE
204082cd038dSYoshinobu Inoue 	 *	0	y	y	n	(4) *
204182cd038dSYoshinobu Inoue 	 *	0	y	y	y	(5) * STALE
204282cd038dSYoshinobu Inoue 	 *	1	--	n	--	(6)   NOSTATE(= PASSIVE)
204382cd038dSYoshinobu Inoue 	 *	1	--	y	--	(7) * STALE
204482cd038dSYoshinobu Inoue 	 */
204582cd038dSYoshinobu Inoue 
2046501adf01SAlexander V. Chernikov 	do_update = 0;
20477503e0c7SAlexander V. Chernikov 	if (is_newentry == 0 && llchange != 0) {
2048501adf01SAlexander V. Chernikov 		do_update = 1;	/* (3,5) */
2049501adf01SAlexander V. Chernikov 
205082cd038dSYoshinobu Inoue 		/*
205182cd038dSYoshinobu Inoue 		 * Record source link-layer address
205282cd038dSYoshinobu Inoue 		 * XXX is it dependent to ifp->if_type?
205382cd038dSYoshinobu Inoue 		 */
20544fb3a820SAlexander V. Chernikov 		linkhdrsize = sizeof(linkhdr);
20554fb3a820SAlexander V. Chernikov 		if (lltable_calc_llheader(ifp, AF_INET6, lladdr,
20564fb3a820SAlexander V. Chernikov 		    linkhdr, &linkhdrsize, &lladdr_off) != 0)
20574fb3a820SAlexander V. Chernikov 			return;
20584fb3a820SAlexander V. Chernikov 
20594fb3a820SAlexander V. Chernikov 		if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize,
20604fb3a820SAlexander V. Chernikov 		    lladdr_off) == 0) {
206112cb7521SAlexander V. Chernikov 			/* Entry was deleted */
206212cb7521SAlexander V. Chernikov 			return;
206312cb7521SAlexander V. Chernikov 		}
206412cb7521SAlexander V. Chernikov 
2065aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(ln, ND6_LLINFO_STALE);
206682cd038dSYoshinobu Inoue 
2067501adf01SAlexander V. Chernikov 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
206882cd038dSYoshinobu Inoue 
2069d7968c29SAlexander V. Chernikov 		if (ln->la_hold != NULL)
2070d7968c29SAlexander V. Chernikov 			nd6_grab_holdchain(ln, &chain, &sin6);
207182cd038dSYoshinobu Inoue 	}
207282cd038dSYoshinobu Inoue 
20730e2dcee6SAlexander V. Chernikov 	/* Calculates new router status */
20740e2dcee6SAlexander V. Chernikov 	router = nd6_is_router(type, code, is_newentry, olladdr,
20750e2dcee6SAlexander V. Chernikov 	    lladdr != NULL ? 1 : 0, ln->ln_router);
207682cd038dSYoshinobu Inoue 
20770e2dcee6SAlexander V. Chernikov 	ln->ln_router = router;
20780e2dcee6SAlexander V. Chernikov 	/* Mark non-router redirects with special flag */
20790e2dcee6SAlexander V. Chernikov 	if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER)
20800e2dcee6SAlexander V. Chernikov 		ln->la_flags |= LLE_REDIRECT;
2081c2b3a02bSKip Macy 
2082f506d933SAlexander V. Chernikov 	if (flags & LLE_EXCLUSIVE)
20836e6b3f7cSQing Li 		LLE_WUNLOCK(ln);
20846e6b3f7cSQing Li 	else
20856e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
20860e2dcee6SAlexander V. Chernikov 
2087d7968c29SAlexander V. Chernikov 	if (chain != NULL)
2088151ba793SAlexander Kabaev 		nd6_flush_holdchain(ifp, chain, &sin6);
20896e6b3f7cSQing Li 
2090554bf4aaSHajimu UMEMOTO 	/*
2091554bf4aaSHajimu UMEMOTO 	 * When the link-layer address of a router changes, select the
2092554bf4aaSHajimu UMEMOTO 	 * best router again.  In particular, when the neighbor entry is newly
2093554bf4aaSHajimu UMEMOTO 	 * created, it might affect the selection policy.
2094554bf4aaSHajimu UMEMOTO 	 * Question: can we restrict the first condition to the "is_newentry"
2095554bf4aaSHajimu UMEMOTO 	 * case?
2096554bf4aaSHajimu UMEMOTO 	 * XXX: when we hear an RA from a new router with the link-layer
2097559b4296SAlan Somers 	 * address option, defrouter_select_fib() is called twice, since
2098554bf4aaSHajimu UMEMOTO 	 * defrtrlist_update called the function as well.  However, I believe
2099554bf4aaSHajimu UMEMOTO 	 * we can compromise the overhead, since it only happens the first
2100554bf4aaSHajimu UMEMOTO 	 * time.
2101559b4296SAlan Somers 	 * XXX: although defrouter_select_fib() should not have a bad effect
2102554bf4aaSHajimu UMEMOTO 	 * for those are not autoconfigured hosts, we explicitly avoid such
2103554bf4aaSHajimu UMEMOTO 	 * cases for safety.
2104554bf4aaSHajimu UMEMOTO 	 */
2105501adf01SAlexander V. Chernikov 	if ((do_update || is_newentry) && router &&
2106a283298cSHiroki Sato 	    ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
21076e6b3f7cSQing Li 		/*
21086e6b3f7cSQing Li 		 * guaranteed recursion
21096e6b3f7cSQing Li 		 */
2110559b4296SAlan Somers 		defrouter_select_fib(ifp->if_fib);
21116e6b3f7cSQing Li 	}
211282cd038dSYoshinobu Inoue }
211382cd038dSYoshinobu Inoue 
211482cd038dSYoshinobu Inoue static void
21158b615593SMarko Zec nd6_slowtimo(void *arg)
211682cd038dSYoshinobu Inoue {
2117a68cc388SGleb Smirnoff 	struct epoch_tracker et;
21188b615593SMarko Zec 	CURVNET_SET((struct vnet *) arg);
211933841545SHajimu UMEMOTO 	struct nd_ifinfo *nd6if;
212031b1bfe1SHajimu UMEMOTO 	struct ifnet *ifp;
212182cd038dSYoshinobu Inoue 
2122603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
2123f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
2124a68cc388SGleb Smirnoff 	NET_EPOCH_ENTER(et);
21254f6c66ccSMatt Macy 	CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
21260de0dd9bSHiroki Sato 		if (ifp->if_afdata[AF_INET6] == NULL)
21270de0dd9bSHiroki Sato 			continue;
212831b1bfe1SHajimu UMEMOTO 		nd6if = ND_IFINFO(ifp);
212982cd038dSYoshinobu Inoue 		if (nd6if->basereachable && /* already initialized */
213082cd038dSYoshinobu Inoue 		    (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
213182cd038dSYoshinobu Inoue 			/*
213282cd038dSYoshinobu Inoue 			 * Since reachable time rarely changes by router
213382cd038dSYoshinobu Inoue 			 * advertisements, we SHOULD insure that a new random
213482cd038dSYoshinobu Inoue 			 * value gets recomputed at least once every few hours.
213582cd038dSYoshinobu Inoue 			 * (RFC 2461, 6.3.4)
213682cd038dSYoshinobu Inoue 			 */
2137603724d3SBjoern A. Zeeb 			nd6if->recalctm = V_nd6_recalc_reachtm_interval;
213882cd038dSYoshinobu Inoue 			nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable);
213982cd038dSYoshinobu Inoue 		}
214082cd038dSYoshinobu Inoue 	}
2141a68cc388SGleb Smirnoff 	NET_EPOCH_EXIT(et);
21428b615593SMarko Zec 	CURVNET_RESTORE();
214382cd038dSYoshinobu Inoue }
214482cd038dSYoshinobu Inoue 
2145d7968c29SAlexander V. Chernikov void
2146d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain,
2147d7968c29SAlexander V. Chernikov     struct sockaddr_in6 *sin6)
2148d7968c29SAlexander V. Chernikov {
2149d7968c29SAlexander V. Chernikov 
2150d7968c29SAlexander V. Chernikov 	LLE_WLOCK_ASSERT(ln);
2151d7968c29SAlexander V. Chernikov 
2152d7968c29SAlexander V. Chernikov 	*chain = ln->la_hold;
2153d7968c29SAlexander V. Chernikov 	ln->la_hold = NULL;
2154314294deSAlexander V. Chernikov 	lltable_fill_sa_entry(ln, (struct sockaddr *)sin6);
2155d7968c29SAlexander V. Chernikov 
2156d7968c29SAlexander V. Chernikov 	if (ln->ln_state == ND6_LLINFO_STALE) {
2157d7968c29SAlexander V. Chernikov 
2158d7968c29SAlexander V. Chernikov 		/*
2159d7968c29SAlexander V. Chernikov 		 * The first time we send a packet to a
2160d7968c29SAlexander V. Chernikov 		 * neighbor whose entry is STALE, we have
2161d7968c29SAlexander V. Chernikov 		 * to change the state to DELAY and a sets
2162d7968c29SAlexander V. Chernikov 		 * a timer to expire in DELAY_FIRST_PROBE_TIME
2163d7968c29SAlexander V. Chernikov 		 * seconds to ensure do neighbor unreachability
2164d7968c29SAlexander V. Chernikov 		 * detection on expiration.
2165d7968c29SAlexander V. Chernikov 		 * (RFC 2461 7.3.3)
2166d7968c29SAlexander V. Chernikov 		 */
2167aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY);
2168d7968c29SAlexander V. Chernikov 	}
2169d7968c29SAlexander V. Chernikov }
2170d7968c29SAlexander V. Chernikov 
21711fe201c3SAlexander V. Chernikov int
2172d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m,
2173637670e7SAlexander V. Chernikov     struct sockaddr_in6 *dst, struct route *ro)
2174d7968c29SAlexander V. Chernikov {
2175d7968c29SAlexander V. Chernikov 	int error;
2176d7968c29SAlexander V. Chernikov 	int ip6len;
2177d7968c29SAlexander V. Chernikov 	struct ip6_hdr *ip6;
2178d7968c29SAlexander V. Chernikov 	struct m_tag *mtag;
2179d7968c29SAlexander V. Chernikov 
2180d7968c29SAlexander V. Chernikov #ifdef MAC
2181d7968c29SAlexander V. Chernikov 	mac_netinet6_nd6_send(ifp, m);
2182d7968c29SAlexander V. Chernikov #endif
2183d7968c29SAlexander V. Chernikov 
2184d7968c29SAlexander V. Chernikov 	/*
2185d7968c29SAlexander V. Chernikov 	 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
2186d7968c29SAlexander V. Chernikov 	 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
2187d7968c29SAlexander V. Chernikov 	 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
2188d7968c29SAlexander V. Chernikov 	 * to be diverted to user space.  When re-injected into the kernel,
2189d7968c29SAlexander V. Chernikov 	 * send_output() will directly dispatch them to the outgoing interface.
2190d7968c29SAlexander V. Chernikov 	 */
2191d7968c29SAlexander V. Chernikov 	if (send_sendso_input_hook != NULL) {
2192d7968c29SAlexander V. Chernikov 		mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
2193d7968c29SAlexander V. Chernikov 		if (mtag != NULL) {
2194d7968c29SAlexander V. Chernikov 			ip6 = mtod(m, struct ip6_hdr *);
2195d7968c29SAlexander V. Chernikov 			ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
2196d7968c29SAlexander V. Chernikov 			/* Use the SEND socket */
2197d7968c29SAlexander V. Chernikov 			error = send_sendso_input_hook(m, ifp, SND_OUT,
2198d7968c29SAlexander V. Chernikov 			    ip6len);
2199d7968c29SAlexander V. Chernikov 			/* -1 == no app on SEND socket */
2200d7968c29SAlexander V. Chernikov 			if (error == 0 || error != -1)
2201d7968c29SAlexander V. Chernikov 			    return (error);
2202d7968c29SAlexander V. Chernikov 		}
2203d7968c29SAlexander V. Chernikov 	}
2204d7968c29SAlexander V. Chernikov 
2205d7968c29SAlexander V. Chernikov 	m_clrprotoflags(m);	/* Avoid confusing lower layers. */
2206d7968c29SAlexander V. Chernikov 	IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
2207d7968c29SAlexander V. Chernikov 	    mtod(m, struct ip6_hdr *));
2208d7968c29SAlexander V. Chernikov 
2209d7968c29SAlexander V. Chernikov 	if ((ifp->if_flags & IFF_LOOPBACK) == 0)
2210d7968c29SAlexander V. Chernikov 		origifp = ifp;
2211d7968c29SAlexander V. Chernikov 
2212637670e7SAlexander V. Chernikov 	error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro);
2213d7968c29SAlexander V. Chernikov 	return (error);
2214d7968c29SAlexander V. Chernikov }
2215d7968c29SAlexander V. Chernikov 
2216f6990c4eSAlexander V. Chernikov /*
22174fb3a820SAlexander V. Chernikov  * Lookup link headerfor @sa_dst address. Stores found
22184fb3a820SAlexander V. Chernikov  * data in @desten buffer. Copy of lle ln_flags can be also
22191fe201c3SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
22201fe201c3SAlexander V. Chernikov  *
22211fe201c3SAlexander V. Chernikov  * If destination LLE does not exists or lle state modification
22221fe201c3SAlexander V. Chernikov  * is required, call "slow" version.
22231fe201c3SAlexander V. Chernikov  *
22241fe201c3SAlexander V. Chernikov  * Return values:
22251fe201c3SAlexander V. Chernikov  * - 0 on success (address copied to buffer).
22261fe201c3SAlexander V. Chernikov  * - EWOULDBLOCK (no local error, but address is still unresolved)
22271fe201c3SAlexander V. Chernikov  * - other errors (alloc failure, etc)
2228f6990c4eSAlexander V. Chernikov  */
222982cd038dSYoshinobu Inoue int
22301fe201c3SAlexander V. Chernikov nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
22316d768226SGeorge V. Neville-Neil     const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags,
22326d768226SGeorge V. Neville-Neil     struct llentry **plle)
223382cd038dSYoshinobu Inoue {
2234f6990c4eSAlexander V. Chernikov 	struct llentry *ln = NULL;
22351fe201c3SAlexander V. Chernikov 	const struct sockaddr_in6 *dst6;
22361fe201c3SAlexander V. Chernikov 
2237b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
2238b8a6e03fSGleb Smirnoff 
22391fe201c3SAlexander V. Chernikov 	if (pflags != NULL)
22401fe201c3SAlexander V. Chernikov 		*pflags = 0;
22411fe201c3SAlexander V. Chernikov 
22421fe201c3SAlexander V. Chernikov 	dst6 = (const struct sockaddr_in6 *)sa_dst;
22436e6b3f7cSQing Li 
2244f6990c4eSAlexander V. Chernikov 	/* discard the packet if IPv6 operation is disabled on the interface */
2245f6990c4eSAlexander V. Chernikov 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
2246f6990c4eSAlexander V. Chernikov 		m_freem(m);
2247f6990c4eSAlexander V. Chernikov 		return (ENETDOWN); /* better error? */
2248f6990c4eSAlexander V. Chernikov 	}
2249f6990c4eSAlexander V. Chernikov 
22501fe201c3SAlexander V. Chernikov 	if (m != NULL && m->m_flags & M_MCAST) {
22511fe201c3SAlexander V. Chernikov 		switch (ifp->if_type) {
22521fe201c3SAlexander V. Chernikov 		case IFT_ETHER:
22531fe201c3SAlexander V. Chernikov 		case IFT_L2VLAN:
22541fe201c3SAlexander V. Chernikov 		case IFT_BRIDGE:
22551fe201c3SAlexander V. Chernikov 			ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr,
22561fe201c3SAlexander V. Chernikov 						 desten);
22571fe201c3SAlexander V. Chernikov 			return (0);
22581fe201c3SAlexander V. Chernikov 		default:
22591fe201c3SAlexander V. Chernikov 			m_freem(m);
22601fe201c3SAlexander V. Chernikov 			return (EAFNOSUPPORT);
22611fe201c3SAlexander V. Chernikov 		}
22621fe201c3SAlexander V. Chernikov 	}
2263f6990c4eSAlexander V. Chernikov 
2264ea17754cSMike Karels 	ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED,
2265ea17754cSMike Karels 	    ifp);
226612cb7521SAlexander V. Chernikov 	if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) {
226712cb7521SAlexander V. Chernikov 		/* Entry found, let's copy lle info */
22684fb3a820SAlexander V. Chernikov 		bcopy(ln->r_linkdata, desten, ln->r_hdrlen);
22691fe201c3SAlexander V. Chernikov 		if (pflags != NULL)
227012cb7521SAlexander V. Chernikov 			*pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR);
227112cb7521SAlexander V. Chernikov 		/* Check if we have feedback request from nd6 timer */
227212cb7521SAlexander V. Chernikov 		if (ln->r_skip_req != 0) {
227312cb7521SAlexander V. Chernikov 			LLE_REQ_LOCK(ln);
227412cb7521SAlexander V. Chernikov 			ln->r_skip_req = 0; /* Notify that entry was used */
227512cb7521SAlexander V. Chernikov 			ln->lle_hittime = time_uptime;
227612cb7521SAlexander V. Chernikov 			LLE_REQ_UNLOCK(ln);
227712cb7521SAlexander V. Chernikov 		}
2278ea17754cSMike Karels 		if (plle) {
2279ea17754cSMike Karels 			LLE_ADDREF(ln);
2280ea17754cSMike Karels 			*plle = ln;
2281ea17754cSMike Karels 			LLE_WUNLOCK(ln);
2282ea17754cSMike Karels 		}
22831fe201c3SAlexander V. Chernikov 		return (0);
2284ea17754cSMike Karels 	} else if (plle && ln)
2285ea17754cSMike Karels 		LLE_WUNLOCK(ln);
228612cb7521SAlexander V. Chernikov 
22876d768226SGeorge V. Neville-Neil 	return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle));
228812cb7521SAlexander V. Chernikov }
22896e6b3f7cSQing Li 
22906e6b3f7cSQing Li 
22916e6b3f7cSQing Li /*
22921fe201c3SAlexander V. Chernikov  * Do L2 address resolution for @sa_dst address. Stores found
22931fe201c3SAlexander V. Chernikov  * address in @desten buffer. Copy of lle ln_flags can be also
22941fe201c3SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
22956e6b3f7cSQing Li  *
22961fe201c3SAlexander V. Chernikov  * Heavy version.
22971fe201c3SAlexander V. Chernikov  * Function assume that destination LLE does not exist,
2298f506d933SAlexander V. Chernikov  * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired.
2299c0b8aeaeSAlexander V. Chernikov  *
2300c0b8aeaeSAlexander V. Chernikov  * Set noinline to be dtrace-friendly
23016e6b3f7cSQing Li  */
2302c0b8aeaeSAlexander V. Chernikov static __noinline int
23034fb3a820SAlexander V. Chernikov nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m,
23046d768226SGeorge V. Neville-Neil     const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags,
23056d768226SGeorge V. Neville-Neil     struct llentry **plle)
23066e6b3f7cSQing Li {
23075a255516SAlexander V. Chernikov 	struct llentry *lle = NULL, *lle_tmp;
2308aa5f023eSAlexander V. Chernikov 	struct in6_addr *psrc, src;
23094fb3a820SAlexander V. Chernikov 	int send_ns, ll_len;
23104fb3a820SAlexander V. Chernikov 	char *lladdr;
231182cd038dSYoshinobu Inoue 
2312b8a6e03fSGleb Smirnoff 	NET_EPOCH_ASSERT();
2313b8a6e03fSGleb Smirnoff 
231482cd038dSYoshinobu Inoue 	/*
231582cd038dSYoshinobu Inoue 	 * Address resolution or Neighbor Unreachability Detection
231682cd038dSYoshinobu Inoue 	 * for the next hop.
231782cd038dSYoshinobu Inoue 	 * At this point, the destination of the packet must be a unicast
231882cd038dSYoshinobu Inoue 	 * or an anycast address(i.e. not a multicast).
231982cd038dSYoshinobu Inoue 	 */
2320f6990c4eSAlexander V. Chernikov 	if (lle == NULL) {
2321f506d933SAlexander V. Chernikov 		lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
2322f6990c4eSAlexander V. Chernikov 		if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp))  {
2323686cdd19SJun-ichiro itojun Hagino 			/*
2324686cdd19SJun-ichiro itojun Hagino 			 * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
2325686cdd19SJun-ichiro itojun Hagino 			 * the condition below is not very efficient.  But we believe
2326686cdd19SJun-ichiro itojun Hagino 			 * it is tolerable, because this should be a rare case.
2327686cdd19SJun-ichiro itojun Hagino 			 */
23285a255516SAlexander V. Chernikov 			lle = nd6_alloc(&dst->sin6_addr, 0, ifp);
2329f6990c4eSAlexander V. Chernikov 			if (lle == NULL) {
23301d54aa3bSBjoern A. Zeeb 				char ip6buf[INET6_ADDRSTRLEN];
2331686cdd19SJun-ichiro itojun Hagino 				log(LOG_DEBUG,
2332686cdd19SJun-ichiro itojun Hagino 				    "nd6_output: can't allocate llinfo for %s "
2333bbd8aebaSQing Li 				    "(ln=%p)\n",
2334f6990c4eSAlexander V. Chernikov 				    ip6_sprintf(ip6buf, &dst->sin6_addr), lle);
23359dffa6a3SAlexander V. Chernikov 				m_freem(m);
23369dffa6a3SAlexander V. Chernikov 				return (ENOBUFS);
233782cd038dSYoshinobu Inoue 			}
23385a255516SAlexander V. Chernikov 
23395a255516SAlexander V. Chernikov 			IF_AFDATA_WLOCK(ifp);
23405a255516SAlexander V. Chernikov 			LLE_WLOCK(lle);
23415a255516SAlexander V. Chernikov 			/* Prefer any existing entry over newly-created one */
2342f506d933SAlexander V. Chernikov 			lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp);
23435a255516SAlexander V. Chernikov 			if (lle_tmp == NULL)
23445a255516SAlexander V. Chernikov 				lltable_link_entry(LLTABLE6(ifp), lle);
23455a255516SAlexander V. Chernikov 			IF_AFDATA_WUNLOCK(ifp);
23465a255516SAlexander V. Chernikov 			if (lle_tmp != NULL) {
23475a255516SAlexander V. Chernikov 				lltable_free_entry(LLTABLE6(ifp), lle);
23485a255516SAlexander V. Chernikov 				lle = lle_tmp;
23495a255516SAlexander V. Chernikov 				lle_tmp = NULL;
23505a255516SAlexander V. Chernikov 			}
23515a255516SAlexander V. Chernikov 		}
23525a255516SAlexander V. Chernikov 	}
23535a255516SAlexander V. Chernikov 	if (lle == NULL) {
23541fe201c3SAlexander V. Chernikov 		m_freem(m);
23551fe201c3SAlexander V. Chernikov 		return (ENOBUFS);
2356686cdd19SJun-ichiro itojun Hagino 	}
2357686cdd19SJun-ichiro itojun Hagino 
2358f6990c4eSAlexander V. Chernikov 	LLE_WLOCK_ASSERT(lle);
2359f6990c4eSAlexander V. Chernikov 
236082cd038dSYoshinobu Inoue 	/*
236182cd038dSYoshinobu Inoue 	 * The first time we send a packet to a neighbor whose entry is
236282cd038dSYoshinobu Inoue 	 * STALE, we have to change the state to DELAY and a sets a timer to
236382cd038dSYoshinobu Inoue 	 * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do
236482cd038dSYoshinobu Inoue 	 * neighbor unreachability detection on expiration.
236582cd038dSYoshinobu Inoue 	 * (RFC 2461 7.3.3)
236682cd038dSYoshinobu Inoue 	 */
2367aa5f023eSAlexander V. Chernikov 	if (lle->ln_state == ND6_LLINFO_STALE)
2368aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY);
236982cd038dSYoshinobu Inoue 
237082cd038dSYoshinobu Inoue 	/*
237182cd038dSYoshinobu Inoue 	 * If the neighbor cache entry has a state other than INCOMPLETE
237288ff5695SSUZUKI Shinsuke 	 * (i.e. its link-layer address is already resolved), just
237382cd038dSYoshinobu Inoue 	 * send the packet.
237482cd038dSYoshinobu Inoue 	 */
23751fe201c3SAlexander V. Chernikov 	if (lle->ln_state > ND6_LLINFO_INCOMPLETE) {
23764fb3a820SAlexander V. Chernikov 		if (flags & LLE_ADDRONLY) {
23774fb3a820SAlexander V. Chernikov 			lladdr = lle->ll_addr;
23784fb3a820SAlexander V. Chernikov 			ll_len = ifp->if_addrlen;
23794fb3a820SAlexander V. Chernikov 		} else {
23804fb3a820SAlexander V. Chernikov 			lladdr = lle->r_linkdata;
23814fb3a820SAlexander V. Chernikov 			ll_len = lle->r_hdrlen;
23824fb3a820SAlexander V. Chernikov 		}
23834fb3a820SAlexander V. Chernikov 		bcopy(lladdr, desten, ll_len);
23841fe201c3SAlexander V. Chernikov 		if (pflags != NULL)
23851fe201c3SAlexander V. Chernikov 			*pflags = lle->la_flags;
23866d768226SGeorge V. Neville-Neil 		if (plle) {
23876d768226SGeorge V. Neville-Neil 			LLE_ADDREF(lle);
23886d768226SGeorge V. Neville-Neil 			*plle = lle;
23896d768226SGeorge V. Neville-Neil 		}
23901fe201c3SAlexander V. Chernikov 		LLE_WUNLOCK(lle);
23911fe201c3SAlexander V. Chernikov 		return (0);
23921fe201c3SAlexander V. Chernikov 	}
239382cd038dSYoshinobu Inoue 
239482cd038dSYoshinobu Inoue 	/*
239582cd038dSYoshinobu Inoue 	 * There is a neighbor cache entry, but no ethernet address
2396743eee66SSUZUKI Shinsuke 	 * response yet.  Append this latest packet to the end of the
2397b0ab3725SLuiz Otavio O Souza 	 * packet queue in the mbuf.  When it exceeds nd6_maxqueuelen,
2398743eee66SSUZUKI Shinsuke 	 * the oldest packet in the queue will be removed.
239982cd038dSYoshinobu Inoue 	 */
24006e6b3f7cSQing Li 
2401f6990c4eSAlexander V. Chernikov 	if (lle->la_hold != NULL) {
2402743eee66SSUZUKI Shinsuke 		struct mbuf *m_hold;
2403743eee66SSUZUKI Shinsuke 		int i;
2404743eee66SSUZUKI Shinsuke 
2405743eee66SSUZUKI Shinsuke 		i = 0;
2406f6990c4eSAlexander V. Chernikov 		for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){
2407743eee66SSUZUKI Shinsuke 			i++;
2408743eee66SSUZUKI Shinsuke 			if (m_hold->m_nextpkt == NULL) {
2409743eee66SSUZUKI Shinsuke 				m_hold->m_nextpkt = m;
2410743eee66SSUZUKI Shinsuke 				break;
241182cd038dSYoshinobu Inoue 			}
241282cd038dSYoshinobu Inoue 		}
2413603724d3SBjoern A. Zeeb 		while (i >= V_nd6_maxqueuelen) {
2414f6990c4eSAlexander V. Chernikov 			m_hold = lle->la_hold;
2415f6990c4eSAlexander V. Chernikov 			lle->la_hold = lle->la_hold->m_nextpkt;
241631d4137bSSUZUKI Shinsuke 			m_freem(m_hold);
2417743eee66SSUZUKI Shinsuke 			i--;
2418743eee66SSUZUKI Shinsuke 		}
2419743eee66SSUZUKI Shinsuke 	} else {
2420f6990c4eSAlexander V. Chernikov 		lle->la_hold = m;
24216e6b3f7cSQing Li 	}
2422743eee66SSUZUKI Shinsuke 
2423743eee66SSUZUKI Shinsuke 	/*
2424743eee66SSUZUKI Shinsuke 	 * If there has been no NS for the neighbor after entering the
2425743eee66SSUZUKI Shinsuke 	 * INCOMPLETE state, send the first solicitation.
2426aa5f023eSAlexander V. Chernikov 	 * Note that for newly-created lle la_asked will be 0,
2427aa5f023eSAlexander V. Chernikov 	 * so we will transition from ND6_LLINFO_NOSTATE to
2428aa5f023eSAlexander V. Chernikov 	 * ND6_LLINFO_INCOMPLETE state here.
2429743eee66SSUZUKI Shinsuke 	 */
2430aa5f023eSAlexander V. Chernikov 	psrc = NULL;
2431aa5f023eSAlexander V. Chernikov 	send_ns = 0;
2432aa5f023eSAlexander V. Chernikov 	if (lle->la_asked == 0) {
2433f6990c4eSAlexander V. Chernikov 		lle->la_asked++;
2434aa5f023eSAlexander V. Chernikov 		send_ns = 1;
243526deb882SAlexander V. Chernikov 		psrc = nd6_llinfo_get_holdsrc(lle, &src);
2436aa5f023eSAlexander V. Chernikov 
2437aa5f023eSAlexander V. Chernikov 		nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE);
2438743eee66SSUZUKI Shinsuke 	}
2439aa5f023eSAlexander V. Chernikov 	LLE_WUNLOCK(lle);
2440aa5f023eSAlexander V. Chernikov 	if (send_ns != 0)
2441aa5f023eSAlexander V. Chernikov 		nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL);
2442e6950476SBjoern A. Zeeb 
24431fe201c3SAlexander V. Chernikov 	return (EWOULDBLOCK);
244482cd038dSYoshinobu Inoue }
244582cd038dSYoshinobu Inoue 
24464fb3a820SAlexander V. Chernikov /*
24474fb3a820SAlexander V. Chernikov  * Do L2 address resolution for @sa_dst address. Stores found
24484fb3a820SAlexander V. Chernikov  * address in @desten buffer. Copy of lle ln_flags can be also
24494fb3a820SAlexander V. Chernikov  * saved in @pflags if @pflags is non-NULL.
24504fb3a820SAlexander V. Chernikov  *
24514fb3a820SAlexander V. Chernikov  * Return values:
24524fb3a820SAlexander V. Chernikov  * - 0 on success (address copied to buffer).
24534fb3a820SAlexander V. Chernikov  * - EWOULDBLOCK (no local error, but address is still unresolved)
24544fb3a820SAlexander V. Chernikov  * - other errors (alloc failure, etc)
24554fb3a820SAlexander V. Chernikov  */
24564fb3a820SAlexander V. Chernikov int
24574fb3a820SAlexander V. Chernikov nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
24584fb3a820SAlexander V. Chernikov     char *desten, uint32_t *pflags)
24594fb3a820SAlexander V. Chernikov {
24604fb3a820SAlexander V. Chernikov 	int error;
24614fb3a820SAlexander V. Chernikov 
24624fb3a820SAlexander V. Chernikov 	flags |= LLE_ADDRONLY;
24634fb3a820SAlexander V. Chernikov 	error = nd6_resolve_slow(ifp, flags, NULL,
24646d768226SGeorge V. Neville-Neil 	    (const struct sockaddr_in6 *)dst, desten, pflags, NULL);
24654fb3a820SAlexander V. Chernikov 	return (error);
24664fb3a820SAlexander V. Chernikov }
24676e6b3f7cSQing Li 
24686e6b3f7cSQing Li int
2469151ba793SAlexander Kabaev nd6_flush_holdchain(struct ifnet *ifp, struct mbuf *chain,
24709c9bde01SAlexander V. Chernikov     struct sockaddr_in6 *dst)
24716e6b3f7cSQing Li {
24726e6b3f7cSQing Li 	struct mbuf *m, *m_head;
24736e6b3f7cSQing Li 	int error = 0;
24746e6b3f7cSQing Li 
24756e6b3f7cSQing Li 	m_head = chain;
24766e6b3f7cSQing Li 
24776e6b3f7cSQing Li 	while (m_head) {
24786e6b3f7cSQing Li 		m = m_head;
24796e6b3f7cSQing Li 		m_head = m_head->m_nextpkt;
2480151ba793SAlexander Kabaev 		error = nd6_output_ifp(ifp, ifp, m, dst, NULL);
24816e6b3f7cSQing Li 	}
24826e6b3f7cSQing Li 
24836e6b3f7cSQing Li 	/*
24846e6b3f7cSQing Li 	 * XXX
24851fe201c3SAlexander V. Chernikov 	 * note that intermediate errors are blindly ignored
24866e6b3f7cSQing Li 	 */
24876e6b3f7cSQing Li 	return (error);
24886e6b3f7cSQing Li }
24896e6b3f7cSQing Li 
24901fe201c3SAlexander V. Chernikov static int
24911272577eSXin LI nd6_need_cache(struct ifnet *ifp)
249233841545SHajimu UMEMOTO {
249333841545SHajimu UMEMOTO 	/*
249433841545SHajimu UMEMOTO 	 * XXX: we currently do not make neighbor cache on any interface
24953a4fc8a8SBrooks Davis 	 * other than Ethernet and GIF.
249633841545SHajimu UMEMOTO 	 *
249733841545SHajimu UMEMOTO 	 * RFC2893 says:
249833841545SHajimu UMEMOTO 	 * - unidirectional tunnels needs no ND
249933841545SHajimu UMEMOTO 	 */
250033841545SHajimu UMEMOTO 	switch (ifp->if_type) {
250133841545SHajimu UMEMOTO 	case IFT_ETHER:
250233841545SHajimu UMEMOTO 	case IFT_IEEE1394:
250305b6760dSMunechika SUMIKAWA 	case IFT_L2VLAN:
2504e4cd31ddSJeff Roberson 	case IFT_INFINIBAND:
250559280079SAndrew Thompson 	case IFT_BRIDGE:
2506c57086ceSHajimu UMEMOTO 	case IFT_PROPVIRTUAL:
250733841545SHajimu UMEMOTO 		return (1);
250833841545SHajimu UMEMOTO 	default:
250933841545SHajimu UMEMOTO 		return (0);
251033841545SHajimu UMEMOTO 	}
251133841545SHajimu UMEMOTO }
251233841545SHajimu UMEMOTO 
25136e6b3f7cSQing Li /*
2514f6b84910SAlexander V. Chernikov  * Add pernament ND6 link-layer record for given
2515f6b84910SAlexander V. Chernikov  * interface address.
2516f6b84910SAlexander V. Chernikov  *
2517f6b84910SAlexander V. Chernikov  * Very similar to IPv4 arp_ifinit(), but:
2518f6b84910SAlexander V. Chernikov  * 1) IPv6 DAD is performed in different place
2519f6b84910SAlexander V. Chernikov  * 2) It is called by IPv6 protocol stack in contrast to
2520f6b84910SAlexander V. Chernikov  * arp_ifinit() which is typically called in SIOCSIFADDR
2521f6b84910SAlexander V. Chernikov  * driver ioctl handler.
2522f6b84910SAlexander V. Chernikov  *
2523f6b84910SAlexander V. Chernikov  */
2524f6b84910SAlexander V. Chernikov int
2525f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia)
2526f6b84910SAlexander V. Chernikov {
2527f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
25285a255516SAlexander V. Chernikov 	struct llentry *ln, *ln_tmp;
25295a255516SAlexander V. Chernikov 	struct sockaddr *dst;
2530f6b84910SAlexander V. Chernikov 
2531f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2532af6209a1SAndrey V. Elsukov 	if (nd6_need_cache(ifp) == 0)
2533af6209a1SAndrey V. Elsukov 		return (0);
25345a255516SAlexander V. Chernikov 
2535f6b84910SAlexander V. Chernikov 	ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
25365a255516SAlexander V. Chernikov 	dst = (struct sockaddr *)&ia->ia_addr;
25375a255516SAlexander V. Chernikov 	ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst);
25385a255516SAlexander V. Chernikov 	if (ln == NULL)
25395a255516SAlexander V. Chernikov 		return (ENOBUFS);
25405a255516SAlexander V. Chernikov 
25415a255516SAlexander V. Chernikov 	IF_AFDATA_WLOCK(ifp);
25425a255516SAlexander V. Chernikov 	LLE_WLOCK(ln);
25435a255516SAlexander V. Chernikov 	/* Unlink any entry if exists */
25445a255516SAlexander V. Chernikov 	ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst);
25455a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25465a255516SAlexander V. Chernikov 		lltable_unlink_entry(LLTABLE6(ifp), ln_tmp);
25475a255516SAlexander V. Chernikov 	lltable_link_entry(LLTABLE6(ifp), ln);
25485a255516SAlexander V. Chernikov 	IF_AFDATA_WUNLOCK(ifp);
25495a255516SAlexander V. Chernikov 
25505a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25515a255516SAlexander V. Chernikov 		EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED);
25525a255516SAlexander V. Chernikov 	EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
25535a255516SAlexander V. Chernikov 
25545a255516SAlexander V. Chernikov 	LLE_WUNLOCK(ln);
25555a255516SAlexander V. Chernikov 	if (ln_tmp != NULL)
25565a255516SAlexander V. Chernikov 		llentry_free(ln_tmp);
25575a255516SAlexander V. Chernikov 
25585a255516SAlexander V. Chernikov 	return (0);
2559f6b84910SAlexander V. Chernikov }
2560f6b84910SAlexander V. Chernikov 
2561f6b84910SAlexander V. Chernikov /*
25623e7a2321SAlexander V. Chernikov  * Removes either all lle entries for given @ia, or lle
25633e7a2321SAlexander V. Chernikov  * corresponding to @ia address.
2564f6b84910SAlexander V. Chernikov  */
2565f6b84910SAlexander V. Chernikov void
25663e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all)
2567f6b84910SAlexander V. Chernikov {
2568f6b84910SAlexander V. Chernikov 	struct sockaddr_in6 mask, addr;
25693e7a2321SAlexander V. Chernikov 	struct sockaddr *saddr, *smask;
2570f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
2571f6b84910SAlexander V. Chernikov 
2572f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2573f6b84910SAlexander V. Chernikov 	memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
2574f6b84910SAlexander V. Chernikov 	memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
25753e7a2321SAlexander V. Chernikov 	saddr = (struct sockaddr *)&addr;
25763e7a2321SAlexander V. Chernikov 	smask = (struct sockaddr *)&mask;
25773e7a2321SAlexander V. Chernikov 
25783e7a2321SAlexander V. Chernikov 	if (all != 0)
25793e7a2321SAlexander V. Chernikov 		lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC);
25803e7a2321SAlexander V. Chernikov 	else
25813e7a2321SAlexander V. Chernikov 		lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr);
2582f6b84910SAlexander V. Chernikov }
2583f6b84910SAlexander V. Chernikov 
258431d4137bSSUZUKI Shinsuke static void
25856e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln)
258631d4137bSSUZUKI Shinsuke {
258731d4137bSSUZUKI Shinsuke 	struct mbuf *m_hold, *m_hold_next;
258831d4137bSSUZUKI Shinsuke 
25896e6b3f7cSQing Li 	for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) {
259031d4137bSSUZUKI Shinsuke 		m_hold_next = m_hold->m_nextpkt;
259131d4137bSSUZUKI Shinsuke 		m_freem(m_hold);
259231d4137bSSUZUKI Shinsuke 	}
259331d4137bSSUZUKI Shinsuke 
25946e6b3f7cSQing Li 	ln->la_hold = NULL;
259531d4137bSSUZUKI Shinsuke }
259631d4137bSSUZUKI Shinsuke 
259733841545SHajimu UMEMOTO static int
259833841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS)
259933841545SHajimu UMEMOTO {
26007195094cSMarius Strobl 	struct in6_prefix p;
26017195094cSMarius Strobl 	struct sockaddr_in6 s6;
260233841545SHajimu UMEMOTO 	struct nd_prefix *pr;
26037195094cSMarius Strobl 	struct nd_pfxrouter *pfr;
26047195094cSMarius Strobl 	time_t maxexpire;
26057195094cSMarius Strobl 	int error;
26061d54aa3bSBjoern A. Zeeb 	char ip6buf[INET6_ADDRSTRLEN];
260733841545SHajimu UMEMOTO 
260833841545SHajimu UMEMOTO 	if (req->newptr)
26097195094cSMarius Strobl 		return (EPERM);
261033841545SHajimu UMEMOTO 
2611cc51be7bSMark Johnston 	error = sysctl_wire_old_buffer(req, 0);
2612cc51be7bSMark Johnston 	if (error != 0)
2613cc51be7bSMark Johnston 		return (error);
2614cc51be7bSMark Johnston 
26157195094cSMarius Strobl 	bzero(&p, sizeof(p));
26167195094cSMarius Strobl 	p.origin = PR_ORIG_RA;
26177195094cSMarius Strobl 	bzero(&s6, sizeof(s6));
26187195094cSMarius Strobl 	s6.sin6_family = AF_INET6;
26197195094cSMarius Strobl 	s6.sin6_len = sizeof(s6);
26207195094cSMarius Strobl 
2621cc51be7bSMark Johnston 	ND6_RLOCK();
26223b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
26237195094cSMarius Strobl 		p.prefix = pr->ndpr_prefix;
26247195094cSMarius Strobl 		if (sa6_recoverscope(&p.prefix)) {
26257195094cSMarius Strobl 			log(LOG_ERR, "scope error in prefix list (%s)\n",
26267195094cSMarius Strobl 			    ip6_sprintf(ip6buf, &p.prefix.sin6_addr));
2627a1f7e5f8SHajimu UMEMOTO 			/* XXX: press on... */
2628a1f7e5f8SHajimu UMEMOTO 		}
26297195094cSMarius Strobl 		p.raflags = pr->ndpr_raf;
26307195094cSMarius Strobl 		p.prefixlen = pr->ndpr_plen;
26317195094cSMarius Strobl 		p.vltime = pr->ndpr_vltime;
26327195094cSMarius Strobl 		p.pltime = pr->ndpr_pltime;
26337195094cSMarius Strobl 		p.if_index = pr->ndpr_ifp->if_index;
2634743eee66SSUZUKI Shinsuke 		if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
26357195094cSMarius Strobl 			p.expire = 0;
2636743eee66SSUZUKI Shinsuke 		else {
2637743eee66SSUZUKI Shinsuke 			/* XXX: we assume time_t is signed. */
2638743eee66SSUZUKI Shinsuke 			maxexpire = (-1) &
26397195094cSMarius Strobl 			    ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
26407195094cSMarius Strobl 			if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate)
26417195094cSMarius Strobl 				p.expire = pr->ndpr_lastupdate +
2642ffa0165aSHiroki Sato 				    pr->ndpr_vltime +
2643ffa0165aSHiroki Sato 				    (time_second - time_uptime);
26447195094cSMarius Strobl 			else
26457195094cSMarius Strobl 				p.expire = maxexpire;
2646743eee66SSUZUKI Shinsuke 		}
26470bbf244eSMark Johnston 		p.refcnt = pr->ndpr_addrcnt;
26487195094cSMarius Strobl 		p.flags = pr->ndpr_stateflags;
26497195094cSMarius Strobl 		p.advrtrs = 0;
26507195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry)
26517195094cSMarius Strobl 			p.advrtrs++;
26527195094cSMarius Strobl 		error = SYSCTL_OUT(req, &p, sizeof(p));
26537195094cSMarius Strobl 		if (error != 0)
2654cc51be7bSMark Johnston 			break;
26557195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
26567195094cSMarius Strobl 			s6.sin6_addr = pfr->router->rtaddr;
26577195094cSMarius Strobl 			if (sa6_recoverscope(&s6))
26587195094cSMarius Strobl 				log(LOG_ERR,
26597195094cSMarius Strobl 				    "scope error in prefix list (%s)\n",
26607195094cSMarius Strobl 				    ip6_sprintf(ip6buf, &pfr->router->rtaddr));
26617195094cSMarius Strobl 			error = SYSCTL_OUT(req, &s6, sizeof(s6));
26627195094cSMarius Strobl 			if (error != 0)
2663d748f7efSMark Johnston 				goto out;
2664cc51be7bSMark Johnston 		}
2665cc51be7bSMark Johnston 	}
2666d748f7efSMark Johnston out:
2667cc51be7bSMark Johnston 	ND6_RUNLOCK();
26687195094cSMarius Strobl 	return (error);
26697195094cSMarius Strobl }
26703c5018caSBjoern A. Zeeb SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
26713c5018caSBjoern A. Zeeb 	CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
26723c5018caSBjoern A. Zeeb 	NULL, 0, nd6_sysctl_prlist, "S,in6_prefix",
26733c5018caSBjoern A. Zeeb 	"NDP prefix list");
26743c5018caSBjoern A. Zeeb SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
26753c5018caSBjoern A. Zeeb 	CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
26763c5018caSBjoern A. Zeeb SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer,
26773c5018caSBjoern A. Zeeb 	CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), "");
2678