xref: /freebsd/sys/netinet6/nd6.c (revision f6b84910bbabbe59ac2ac5cc991afbc2cf4cce0e)
1caf43b02SWarner Losh /*-
282cd038dSYoshinobu Inoue  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
382cd038dSYoshinobu Inoue  * All rights reserved.
482cd038dSYoshinobu Inoue  *
582cd038dSYoshinobu Inoue  * Redistribution and use in source and binary forms, with or without
682cd038dSYoshinobu Inoue  * modification, are permitted provided that the following conditions
782cd038dSYoshinobu Inoue  * are met:
882cd038dSYoshinobu Inoue  * 1. Redistributions of source code must retain the above copyright
982cd038dSYoshinobu Inoue  *    notice, this list of conditions and the following disclaimer.
1082cd038dSYoshinobu Inoue  * 2. Redistributions in binary form must reproduce the above copyright
1182cd038dSYoshinobu Inoue  *    notice, this list of conditions and the following disclaimer in the
1282cd038dSYoshinobu Inoue  *    documentation and/or other materials provided with the distribution.
1382cd038dSYoshinobu Inoue  * 3. Neither the name of the project nor the names of its contributors
1482cd038dSYoshinobu Inoue  *    may be used to endorse or promote products derived from this software
1582cd038dSYoshinobu Inoue  *    without specific prior written permission.
1682cd038dSYoshinobu Inoue  *
1782cd038dSYoshinobu Inoue  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
1882cd038dSYoshinobu Inoue  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1982cd038dSYoshinobu Inoue  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2082cd038dSYoshinobu Inoue  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
2182cd038dSYoshinobu Inoue  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2282cd038dSYoshinobu Inoue  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2382cd038dSYoshinobu Inoue  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2482cd038dSYoshinobu Inoue  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2582cd038dSYoshinobu Inoue  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2682cd038dSYoshinobu Inoue  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2782cd038dSYoshinobu Inoue  * SUCH DAMAGE.
28b48287a3SDavid E. O'Brien  *
29b48287a3SDavid E. O'Brien  *	$KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $
3082cd038dSYoshinobu Inoue  */
3182cd038dSYoshinobu Inoue 
32b48287a3SDavid E. O'Brien #include <sys/cdefs.h>
33b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$");
34b48287a3SDavid E. O'Brien 
35686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h"
36686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h"
37686cdd19SJun-ichiro itojun Hagino 
3882cd038dSYoshinobu Inoue #include <sys/param.h>
3982cd038dSYoshinobu Inoue #include <sys/systm.h>
4033841545SHajimu UMEMOTO #include <sys/callout.h>
4182cd038dSYoshinobu Inoue #include <sys/malloc.h>
4282cd038dSYoshinobu Inoue #include <sys/mbuf.h>
4382cd038dSYoshinobu Inoue #include <sys/socket.h>
4482cd038dSYoshinobu Inoue #include <sys/sockio.h>
4582cd038dSYoshinobu Inoue #include <sys/time.h>
4682cd038dSYoshinobu Inoue #include <sys/kernel.h>
47686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h>
4882cd038dSYoshinobu Inoue #include <sys/errno.h>
4982cd038dSYoshinobu Inoue #include <sys/syslog.h>
506e6b3f7cSQing Li #include <sys/lock.h>
516e6b3f7cSQing Li #include <sys/rwlock.h>
5282cd038dSYoshinobu Inoue #include <sys/queue.h>
5357f60867SMark Johnston #include <sys/sdt.h>
5433841545SHajimu UMEMOTO #include <sys/sysctl.h>
5582cd038dSYoshinobu Inoue 
5682cd038dSYoshinobu Inoue #include <net/if.h>
5776039bc8SGleb Smirnoff #include <net/if_var.h>
5831b3783cSHajimu UMEMOTO #include <net/if_arc.h>
5982cd038dSYoshinobu Inoue #include <net/if_dl.h>
6082cd038dSYoshinobu Inoue #include <net/if_types.h>
612049fdeeSMatthew N. Dodd #include <net/iso88025.h>
628e5fd461SMatthew N. Dodd #include <net/fddi.h>
6382cd038dSYoshinobu Inoue #include <net/route.h>
644b79449eSBjoern A. Zeeb #include <net/vnet.h>
6582cd038dSYoshinobu Inoue 
6682cd038dSYoshinobu Inoue #include <netinet/in.h>
6757f60867SMark Johnston #include <netinet/in_kdtrace.h>
686e6b3f7cSQing Li #include <net/if_llatbl.h>
696e6b3f7cSQing Li #define	L3_ADDR_SIN6(le)	((struct sockaddr_in6 *) L3_ADDR(le))
7082cd038dSYoshinobu Inoue #include <netinet/if_ether.h>
7182cd038dSYoshinobu Inoue #include <netinet6/in6_var.h>
72686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h>
7382cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h>
74a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h>
7582cd038dSYoshinobu Inoue #include <netinet6/nd6.h>
76a283298cSHiroki Sato #include <netinet6/in6_ifattach.h>
77686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h>
781db8d1f8SAna Kukec #include <netinet6/send.h>
7982cd038dSYoshinobu Inoue 
80743eee66SSUZUKI Shinsuke #include <sys/limits.h>
81743eee66SSUZUKI Shinsuke 
82aed55708SRobert Watson #include <security/mac/mac_framework.h>
83aed55708SRobert Watson 
8482cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */
8582cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */
8682cd038dSYoshinobu Inoue 
8747e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s))
8882cd038dSYoshinobu Inoue 
8982cea7e6SBjoern A. Zeeb /* timer values */
9082cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune)	= 1;	/* walk list every 1 seconds */
9182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay)	= 5;	/* delay first probe time 5 second */
9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries)	= 3;	/* maximum unicast query */
9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries)	= 3;	/* maximum multicast query */
9482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1;	/* use loopback interface for
9582cea7e6SBjoern A. Zeeb 					 * local traffic */
9682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer)	= (60 * 60 * 24); /* 1 day: garbage
9782cea7e6SBjoern A. Zeeb 					 * collection timer */
98686cdd19SJun-ichiro itojun Hagino 
99686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */
1003e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxndopt) = 10; /* max # of ND options allowed */
10182cea7e6SBjoern A. Zeeb 
10282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0;	/* max # of subsequent upper
10382cea7e6SBjoern A. Zeeb 					 * layer hints */
1043e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
10582cea7e6SBjoern A. Zeeb 					 * ND entries */
1061e77c105SRobert Watson #define	V_nd6_maxndopt			VNET(nd6_maxndopt)
1071e77c105SRobert Watson #define	V_nd6_maxqueuelen		VNET(nd6_maxqueuelen)
108686cdd19SJun-ichiro itojun Hagino 
10982cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG
11082cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1;
11182cea7e6SBjoern A. Zeeb #else
11282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0;
11382cea7e6SBjoern A. Zeeb #endif
11433841545SHajimu UMEMOTO 
11582cd038dSYoshinobu Inoue /* for debugging? */
1166e6b3f7cSQing Li #if 0
11782cd038dSYoshinobu Inoue static int nd6_inuse, nd6_allocated;
1186e6b3f7cSQing Li #endif
11982cd038dSYoshinobu Inoue 
120eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter);
121eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix);
12282cd038dSYoshinobu Inoue 
12382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL;
1241e77c105SRobert Watson #define	V_nd6_recalc_reachtm_interval	VNET(nd6_recalc_reachtm_interval)
12544e33a07SMarko Zec 
1261db8d1f8SAna Kukec int	(*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
1271db8d1f8SAna Kukec 
1286f56329aSXin LI static int nd6_is_new_addr_neighbor(struct sockaddr_in6 *,
1296f56329aSXin LI 	struct ifnet *);
1309233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *);
1319233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *);
1329233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *);
1336e6b3f7cSQing Li static struct llentry *nd6_free(struct llentry *, int);
1349233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *);
1356e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *);
136*f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
13733841545SHajimu UMEMOTO 
1383e288e62SDimitry Andric static VNET_DEFINE(struct callout, nd6_slowtimo_ch);
1391e77c105SRobert Watson #define	V_nd6_slowtimo_ch		VNET(nd6_slowtimo_ch)
140eddfbb76SRobert Watson 
141eddfbb76SRobert Watson VNET_DEFINE(struct callout, nd6_timer_ch);
142eddfbb76SRobert Watson 
14382cd038dSYoshinobu Inoue void
1441272577eSXin LI nd6_init(void)
14582cd038dSYoshinobu Inoue {
14682cd038dSYoshinobu Inoue 
14744e33a07SMarko Zec 	LIST_INIT(&V_nd_prefix);
14844e33a07SMarko Zec 
149686cdd19SJun-ichiro itojun Hagino 	/* initialization of the default router list */
150603724d3SBjoern A. Zeeb 	TAILQ_INIT(&V_nd_defrouter);
15182cea7e6SBjoern A. Zeeb 
15282cd038dSYoshinobu Inoue 	/* start timer */
153603724d3SBjoern A. Zeeb 	callout_init(&V_nd6_slowtimo_ch, 0);
154603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
155f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
15682cd038dSYoshinobu Inoue }
15782cd038dSYoshinobu Inoue 
158bc29160dSMarko Zec #ifdef VIMAGE
159bc29160dSMarko Zec void
160bc29160dSMarko Zec nd6_destroy()
161bc29160dSMarko Zec {
162bc29160dSMarko Zec 
163bc29160dSMarko Zec 	callout_drain(&V_nd6_slowtimo_ch);
164bc29160dSMarko Zec 	callout_drain(&V_nd6_timer_ch);
165bc29160dSMarko Zec }
166bc29160dSMarko Zec #endif
167bc29160dSMarko Zec 
16831b1bfe1SHajimu UMEMOTO struct nd_ifinfo *
1691272577eSXin LI nd6_ifattach(struct ifnet *ifp)
17082cd038dSYoshinobu Inoue {
17131b1bfe1SHajimu UMEMOTO 	struct nd_ifinfo *nd;
17282cd038dSYoshinobu Inoue 
17339e19560SBjoern A. Zeeb 	nd = (struct nd_ifinfo *)malloc(sizeof(*nd), M_IP6NDP, M_WAITOK|M_ZERO);
17431b1bfe1SHajimu UMEMOTO 	nd->initialized = 1;
17582cd038dSYoshinobu Inoue 
17631b1bfe1SHajimu UMEMOTO 	nd->chlim = IPV6_DEFHLIM;
17731b1bfe1SHajimu UMEMOTO 	nd->basereachable = REACHABLE_TIME;
17831b1bfe1SHajimu UMEMOTO 	nd->reachable = ND_COMPUTE_RTIME(nd->basereachable);
17931b1bfe1SHajimu UMEMOTO 	nd->retrans = RETRANS_TIMER;
180a283298cSHiroki Sato 
181a283298cSHiroki Sato 	nd->flags = ND6_IFF_PERFORMNUD;
182a283298cSHiroki Sato 
183af805644SHiroki Sato 	/* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL.
184af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by
185af805644SHiroki Sato 	 * default regardless of the V_ip6_auto_linklocal configuration to
186af805644SHiroki Sato 	 * give a reasonable default behavior.
187af805644SHiroki Sato 	 */
188af805644SHiroki Sato 	if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) ||
189af805644SHiroki Sato 	    (ifp->if_flags & IFF_LOOPBACK))
190a283298cSHiroki Sato 		nd->flags |= ND6_IFF_AUTO_LINKLOCAL;
191af805644SHiroki Sato 	/*
192af805644SHiroki Sato 	 * A loopback interface does not need to accept RTADV.
193af805644SHiroki Sato 	 * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by
194af805644SHiroki Sato 	 * default regardless of the V_ip6_accept_rtadv configuration to
195af805644SHiroki Sato 	 * prevent the interface from accepting RA messages arrived
196af805644SHiroki Sato 	 * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV.
197af805644SHiroki Sato 	 */
198af805644SHiroki Sato 	if (V_ip6_accept_rtadv &&
199af805644SHiroki Sato 	    !(ifp->if_flags & IFF_LOOPBACK) &&
200af805644SHiroki Sato 	    (ifp->if_type != IFT_BRIDGE))
201a283298cSHiroki Sato 			nd->flags |= ND6_IFF_ACCEPT_RTADV;
202e7fa8d0aSHiroki Sato 	if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK))
203e7fa8d0aSHiroki Sato 		nd->flags |= ND6_IFF_NO_RADR;
20431b1bfe1SHajimu UMEMOTO 
20531b1bfe1SHajimu UMEMOTO 	/* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */
20631b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, nd);
20731b1bfe1SHajimu UMEMOTO 
20831b1bfe1SHajimu UMEMOTO 	return nd;
20931b1bfe1SHajimu UMEMOTO }
21031b1bfe1SHajimu UMEMOTO 
21131b1bfe1SHajimu UMEMOTO void
2121272577eSXin LI nd6_ifdetach(struct nd_ifinfo *nd)
21331b1bfe1SHajimu UMEMOTO {
21431b1bfe1SHajimu UMEMOTO 
21531b1bfe1SHajimu UMEMOTO 	free(nd, M_IP6NDP);
21682cd038dSYoshinobu Inoue }
21782cd038dSYoshinobu Inoue 
21882cd038dSYoshinobu Inoue /*
21982cd038dSYoshinobu Inoue  * Reset ND level link MTU. This function is called when the physical MTU
22082cd038dSYoshinobu Inoue  * changes, which means we might have to adjust the ND level MTU.
22182cd038dSYoshinobu Inoue  */
22282cd038dSYoshinobu Inoue void
2231272577eSXin LI nd6_setmtu(struct ifnet *ifp)
22482cd038dSYoshinobu Inoue {
22531b1bfe1SHajimu UMEMOTO 
22631b1bfe1SHajimu UMEMOTO 	nd6_setmtu0(ifp, ND_IFINFO(ifp));
22731b1bfe1SHajimu UMEMOTO }
22831b1bfe1SHajimu UMEMOTO 
22931b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */
23031b1bfe1SHajimu UMEMOTO void
2311272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi)
23231b1bfe1SHajimu UMEMOTO {
23331b3783cSHajimu UMEMOTO 	u_int32_t omaxmtu;
23431b1bfe1SHajimu UMEMOTO 
23531b3783cSHajimu UMEMOTO 	omaxmtu = ndi->maxmtu;
23682cd038dSYoshinobu Inoue 
23782cd038dSYoshinobu Inoue 	switch (ifp->if_type) {
23831b3783cSHajimu UMEMOTO 	case IFT_ARCNET:
23931b3783cSHajimu UMEMOTO 		ndi->maxmtu = MIN(ARC_PHDS_MAXMTU, ifp->if_mtu); /* RFC2497 */
24082cd038dSYoshinobu Inoue 		break;
24182cd038dSYoshinobu Inoue 	case IFT_FDDI:
24231b3783cSHajimu UMEMOTO 		ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu); /* RFC2467 */
24382cd038dSYoshinobu Inoue 		break;
2442049fdeeSMatthew N. Dodd 	case IFT_ISO88025:
2452049fdeeSMatthew N. Dodd 		 ndi->maxmtu = MIN(ISO88025_MAX_MTU, ifp->if_mtu);
2462049fdeeSMatthew N. Dodd 		 break;
24782cd038dSYoshinobu Inoue 	default:
24882cd038dSYoshinobu Inoue 		ndi->maxmtu = ifp->if_mtu;
24982cd038dSYoshinobu Inoue 		break;
25082cd038dSYoshinobu Inoue 	}
25182cd038dSYoshinobu Inoue 
25282cd038dSYoshinobu Inoue 	/*
25331b3783cSHajimu UMEMOTO 	 * Decreasing the interface MTU under IPV6 minimum MTU may cause
25431b3783cSHajimu UMEMOTO 	 * undesirable situation.  We thus notify the operator of the change
25531b3783cSHajimu UMEMOTO 	 * explicitly.  The check for omaxmtu is necessary to restrict the
25631b3783cSHajimu UMEMOTO 	 * log to the case of changing the MTU, not initializing it.
25782cd038dSYoshinobu Inoue 	 */
25831b3783cSHajimu UMEMOTO 	if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) {
25931b3783cSHajimu UMEMOTO 		log(LOG_NOTICE, "nd6_setmtu0: "
26031b3783cSHajimu UMEMOTO 		    "new link MTU on %s (%lu) is too small for IPv6\n",
26131b3783cSHajimu UMEMOTO 		    if_name(ifp), (unsigned long)ndi->maxmtu);
26282cd038dSYoshinobu Inoue 	}
26331b3783cSHajimu UMEMOTO 
264603724d3SBjoern A. Zeeb 	if (ndi->maxmtu > V_in6_maxmtu)
26531b3783cSHajimu UMEMOTO 		in6_setmaxmtu(); /* check all interfaces just in case */
26631b3783cSHajimu UMEMOTO 
26782cd038dSYoshinobu Inoue }
26882cd038dSYoshinobu Inoue 
26982cd038dSYoshinobu Inoue void
2701272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts)
27182cd038dSYoshinobu Inoue {
27207eb2995SHajimu UMEMOTO 
27382cd038dSYoshinobu Inoue 	bzero(ndopts, sizeof(*ndopts));
27482cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)opt;
27582cd038dSYoshinobu Inoue 	ndopts->nd_opts_last
27682cd038dSYoshinobu Inoue 		= (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len);
27782cd038dSYoshinobu Inoue 
27882cd038dSYoshinobu Inoue 	if (icmp6len == 0) {
27982cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
28082cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
28182cd038dSYoshinobu Inoue 	}
28282cd038dSYoshinobu Inoue }
28382cd038dSYoshinobu Inoue 
28482cd038dSYoshinobu Inoue /*
28582cd038dSYoshinobu Inoue  * Take one ND option.
28682cd038dSYoshinobu Inoue  */
28782cd038dSYoshinobu Inoue struct nd_opt_hdr *
2881272577eSXin LI nd6_option(union nd_opts *ndopts)
28982cd038dSYoshinobu Inoue {
29082cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
29182cd038dSYoshinobu Inoue 	int olen;
29282cd038dSYoshinobu Inoue 
29339e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
29439e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
29539e19560SBjoern A. Zeeb 	    __func__));
2962ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
29782cd038dSYoshinobu Inoue 		return NULL;
29882cd038dSYoshinobu Inoue 	if (ndopts->nd_opts_done)
29982cd038dSYoshinobu Inoue 		return NULL;
30082cd038dSYoshinobu Inoue 
30182cd038dSYoshinobu Inoue 	nd_opt = ndopts->nd_opts_search;
30282cd038dSYoshinobu Inoue 
30319391949SKris Kennaway 	/* make sure nd_opt_len is inside the buffer */
30419391949SKris Kennaway 	if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) {
30519391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
30619391949SKris Kennaway 		return NULL;
30719391949SKris Kennaway 	}
30819391949SKris Kennaway 
30982cd038dSYoshinobu Inoue 	olen = nd_opt->nd_opt_len << 3;
31082cd038dSYoshinobu Inoue 	if (olen == 0) {
31182cd038dSYoshinobu Inoue 		/*
31282cd038dSYoshinobu Inoue 		 * Message validation requires that all included
31382cd038dSYoshinobu Inoue 		 * options have a length that is greater than zero.
31482cd038dSYoshinobu Inoue 		 */
31582cd038dSYoshinobu Inoue 		bzero(ndopts, sizeof(*ndopts));
31682cd038dSYoshinobu Inoue 		return NULL;
31782cd038dSYoshinobu Inoue 	}
31882cd038dSYoshinobu Inoue 
31982cd038dSYoshinobu Inoue 	ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen);
32019391949SKris Kennaway 	if (ndopts->nd_opts_search > ndopts->nd_opts_last) {
32119391949SKris Kennaway 		/* option overruns the end of buffer, invalid */
32219391949SKris Kennaway 		bzero(ndopts, sizeof(*ndopts));
32319391949SKris Kennaway 		return NULL;
32419391949SKris Kennaway 	} else if (ndopts->nd_opts_search == ndopts->nd_opts_last) {
32519391949SKris Kennaway 		/* reached the end of options chain */
32682cd038dSYoshinobu Inoue 		ndopts->nd_opts_done = 1;
32782cd038dSYoshinobu Inoue 		ndopts->nd_opts_search = NULL;
32882cd038dSYoshinobu Inoue 	}
32982cd038dSYoshinobu Inoue 	return nd_opt;
33082cd038dSYoshinobu Inoue }
33182cd038dSYoshinobu Inoue 
33282cd038dSYoshinobu Inoue /*
33382cd038dSYoshinobu Inoue  * Parse multiple ND options.
33482cd038dSYoshinobu Inoue  * This function is much easier to use, for ND routines that do not need
33582cd038dSYoshinobu Inoue  * multiple options of the same type.
33682cd038dSYoshinobu Inoue  */
33782cd038dSYoshinobu Inoue int
3381272577eSXin LI nd6_options(union nd_opts *ndopts)
33982cd038dSYoshinobu Inoue {
34082cd038dSYoshinobu Inoue 	struct nd_opt_hdr *nd_opt;
34182cd038dSYoshinobu Inoue 	int i = 0;
34282cd038dSYoshinobu Inoue 
34339e19560SBjoern A. Zeeb 	KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__));
34439e19560SBjoern A. Zeeb 	KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts",
34539e19560SBjoern A. Zeeb 	    __func__));
3462ce62dceSSUZUKI Shinsuke 	if (ndopts->nd_opts_search == NULL)
34782cd038dSYoshinobu Inoue 		return 0;
34882cd038dSYoshinobu Inoue 
34982cd038dSYoshinobu Inoue 	while (1) {
35082cd038dSYoshinobu Inoue 		nd_opt = nd6_option(ndopts);
3512ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
35282cd038dSYoshinobu Inoue 			/*
35382cd038dSYoshinobu Inoue 			 * Message validation requires that all included
35482cd038dSYoshinobu Inoue 			 * options have a length that is greater than zero.
35582cd038dSYoshinobu Inoue 			 */
356e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_badopt);
35782cd038dSYoshinobu Inoue 			bzero(ndopts, sizeof(*ndopts));
35882cd038dSYoshinobu Inoue 			return -1;
35982cd038dSYoshinobu Inoue 		}
36082cd038dSYoshinobu Inoue 
3612ce62dceSSUZUKI Shinsuke 		if (nd_opt == NULL)
36282cd038dSYoshinobu Inoue 			goto skip1;
36382cd038dSYoshinobu Inoue 
36482cd038dSYoshinobu Inoue 		switch (nd_opt->nd_opt_type) {
36582cd038dSYoshinobu Inoue 		case ND_OPT_SOURCE_LINKADDR:
36682cd038dSYoshinobu Inoue 		case ND_OPT_TARGET_LINKADDR:
36782cd038dSYoshinobu Inoue 		case ND_OPT_MTU:
36882cd038dSYoshinobu Inoue 		case ND_OPT_REDIRECTED_HEADER:
36982cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
37033841545SHajimu UMEMOTO 				nd6log((LOG_INFO,
37133841545SHajimu UMEMOTO 				    "duplicated ND6 option found (type=%d)\n",
37233841545SHajimu UMEMOTO 				    nd_opt->nd_opt_type));
37382cd038dSYoshinobu Inoue 				/* XXX bark? */
37482cd038dSYoshinobu Inoue 			} else {
37582cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
37682cd038dSYoshinobu Inoue 					= nd_opt;
37782cd038dSYoshinobu Inoue 			}
37882cd038dSYoshinobu Inoue 			break;
37982cd038dSYoshinobu Inoue 		case ND_OPT_PREFIX_INFORMATION:
38082cd038dSYoshinobu Inoue 			if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) {
38182cd038dSYoshinobu Inoue 				ndopts->nd_opt_array[nd_opt->nd_opt_type]
38282cd038dSYoshinobu Inoue 					= nd_opt;
38382cd038dSYoshinobu Inoue 			}
38482cd038dSYoshinobu Inoue 			ndopts->nd_opts_pi_end =
38582cd038dSYoshinobu Inoue 				(struct nd_opt_prefix_info *)nd_opt;
38682cd038dSYoshinobu Inoue 			break;
387abbe8356SBjoern A. Zeeb 		/* What about ND_OPT_ROUTE_INFO? RFC 4191 */
388abbe8356SBjoern A. Zeeb 		case ND_OPT_RDNSS:	/* RFC 6106 */
389abbe8356SBjoern A. Zeeb 		case ND_OPT_DNSSL:	/* RFC 6106 */
390abbe8356SBjoern A. Zeeb 			/*
391abbe8356SBjoern A. Zeeb 			 * Silently ignore options we know and do not care about
392abbe8356SBjoern A. Zeeb 			 * in the kernel.
393abbe8356SBjoern A. Zeeb 			 */
394abbe8356SBjoern A. Zeeb 			break;
39582cd038dSYoshinobu Inoue 		default:
39682cd038dSYoshinobu Inoue 			/*
39782cd038dSYoshinobu Inoue 			 * Unknown options must be silently ignored,
39882cd038dSYoshinobu Inoue 			 * to accomodate future extension to the protocol.
39982cd038dSYoshinobu Inoue 			 */
40033841545SHajimu UMEMOTO 			nd6log((LOG_DEBUG,
40182cd038dSYoshinobu Inoue 			    "nd6_options: unsupported option %d - "
40233841545SHajimu UMEMOTO 			    "option ignored\n", nd_opt->nd_opt_type));
40382cd038dSYoshinobu Inoue 		}
40482cd038dSYoshinobu Inoue 
40582cd038dSYoshinobu Inoue skip1:
40682cd038dSYoshinobu Inoue 		i++;
407603724d3SBjoern A. Zeeb 		if (i > V_nd6_maxndopt) {
408e27b0c87SRobert Watson 			ICMP6STAT_INC(icp6s_nd_toomanyopt);
40933841545SHajimu UMEMOTO 			nd6log((LOG_INFO, "too many loop in nd opt\n"));
41082cd038dSYoshinobu Inoue 			break;
41182cd038dSYoshinobu Inoue 		}
41282cd038dSYoshinobu Inoue 
41382cd038dSYoshinobu Inoue 		if (ndopts->nd_opts_done)
41482cd038dSYoshinobu Inoue 			break;
41582cd038dSYoshinobu Inoue 	}
41682cd038dSYoshinobu Inoue 
41782cd038dSYoshinobu Inoue 	return 0;
41882cd038dSYoshinobu Inoue }
41982cd038dSYoshinobu Inoue 
42082cd038dSYoshinobu Inoue /*
421743eee66SSUZUKI Shinsuke  * ND6 timer routine to handle ND6 entries
42282cd038dSYoshinobu Inoue  */
42382cd038dSYoshinobu Inoue void
4246e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick)
425743eee66SSUZUKI Shinsuke {
426ef8d671cSHajimu UMEMOTO 	int canceled;
427ef8d671cSHajimu UMEMOTO 
428e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
429e6950476SBjoern A. Zeeb 
430743eee66SSUZUKI Shinsuke 	if (tick < 0) {
4316e6b3f7cSQing Li 		ln->la_expire = 0;
432743eee66SSUZUKI Shinsuke 		ln->ln_ntick = 0;
433ef8d671cSHajimu UMEMOTO 		canceled = callout_stop(&ln->ln_timer_ch);
434743eee66SSUZUKI Shinsuke 	} else {
4357d26db17SHiroki Sato 		ln->la_expire = time_uptime + tick / hz;
4366e6b3f7cSQing Li 		LLE_ADDREF(ln);
437743eee66SSUZUKI Shinsuke 		if (tick > INT_MAX) {
438743eee66SSUZUKI Shinsuke 			ln->ln_ntick = tick - INT_MAX;
439ef8d671cSHajimu UMEMOTO 			canceled = callout_reset(&ln->ln_timer_ch, INT_MAX,
440743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
441743eee66SSUZUKI Shinsuke 		} else {
442743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
443ef8d671cSHajimu UMEMOTO 			canceled = callout_reset(&ln->ln_timer_ch, tick,
444743eee66SSUZUKI Shinsuke 			    nd6_llinfo_timer, ln);
445743eee66SSUZUKI Shinsuke 		}
446743eee66SSUZUKI Shinsuke 	}
447ef8d671cSHajimu UMEMOTO 	if (canceled)
448ef8d671cSHajimu UMEMOTO 		LLE_REMREF(ln);
449743eee66SSUZUKI Shinsuke }
45082cd038dSYoshinobu Inoue 
4516e6b3f7cSQing Li void
4526e6b3f7cSQing Li nd6_llinfo_settimer(struct llentry *ln, long tick)
4536e6b3f7cSQing Li {
4546e6b3f7cSQing Li 
4556e6b3f7cSQing Li 	LLE_WLOCK(ln);
4566e6b3f7cSQing Li 	nd6_llinfo_settimer_locked(ln, tick);
4576e6b3f7cSQing Li 	LLE_WUNLOCK(ln);
4586e6b3f7cSQing Li }
4596e6b3f7cSQing Li 
460743eee66SSUZUKI Shinsuke static void
4611272577eSXin LI nd6_llinfo_timer(void *arg)
462743eee66SSUZUKI Shinsuke {
4636e6b3f7cSQing Li 	struct llentry *ln;
464743eee66SSUZUKI Shinsuke 	struct in6_addr *dst;
465743eee66SSUZUKI Shinsuke 	struct ifnet *ifp;
466686cdd19SJun-ichiro itojun Hagino 	struct nd_ifinfo *ndi = NULL;
46782cd038dSYoshinobu Inoue 
46819291ab3SBjoern A. Zeeb 	KASSERT(arg != NULL, ("%s: arg NULL", __func__));
4696e6b3f7cSQing Li 	ln = (struct llentry *)arg;
470e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
47119291ab3SBjoern A. Zeeb 	ifp = ln->lle_tbl->llt_ifp;
4726e6b3f7cSQing Li 
4736e6b3f7cSQing Li 	CURVNET_SET(ifp->if_vnet);
47482cd038dSYoshinobu Inoue 
475743eee66SSUZUKI Shinsuke 	if (ln->ln_ntick > 0) {
476743eee66SSUZUKI Shinsuke 		if (ln->ln_ntick > INT_MAX) {
477743eee66SSUZUKI Shinsuke 			ln->ln_ntick -= INT_MAX;
478e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, INT_MAX);
479743eee66SSUZUKI Shinsuke 		} else {
480743eee66SSUZUKI Shinsuke 			ln->ln_ntick = 0;
481e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, ln->ln_ntick);
48282cd038dSYoshinobu Inoue 		}
4836e6b3f7cSQing Li 		goto done;
484743eee66SSUZUKI Shinsuke 	}
485743eee66SSUZUKI Shinsuke 
486743eee66SSUZUKI Shinsuke 	ndi = ND_IFINFO(ifp);
4876e6b3f7cSQing Li 	dst = &L3_ADDR_SIN6(ln)->sin6_addr;
488287e3cb4SHajimu UMEMOTO 	if (ln->la_flags & LLE_STATIC) {
4896e6b3f7cSQing Li 		goto done;
4906e6b3f7cSQing Li 	}
49182cd038dSYoshinobu Inoue 
4926e6b3f7cSQing Li 	if (ln->la_flags & LLE_DELETED) {
4936e6b3f7cSQing Li 		(void)nd6_free(ln, 0);
4942eb10edcSHajimu UMEMOTO 		ln = NULL;
4956e6b3f7cSQing Li 		goto done;
4966e6b3f7cSQing Li 	}
49782cd038dSYoshinobu Inoue 
49882cd038dSYoshinobu Inoue 	switch (ln->ln_state) {
49982cd038dSYoshinobu Inoue 	case ND6_LLINFO_INCOMPLETE:
5006e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_mmaxtries) {
5016e6b3f7cSQing Li 			ln->la_asked++;
502e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
503e6950476SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
504743eee66SSUZUKI Shinsuke 			nd6_ns_output(ifp, NULL, dst, ln, 0);
505e6950476SBjoern A. Zeeb 			LLE_WLOCK(ln);
50682cd038dSYoshinobu Inoue 		} else {
5076e6b3f7cSQing Li 			struct mbuf *m = ln->la_hold;
50882cd038dSYoshinobu Inoue 			if (m) {
50931d4137bSSUZUKI Shinsuke 				struct mbuf *m0;
51031d4137bSSUZUKI Shinsuke 
51182cd038dSYoshinobu Inoue 				/*
5126e6b3f7cSQing Li 				 * assuming every packet in la_hold has the
513e6950476SBjoern A. Zeeb 				 * same IP header.  Send error after unlock.
51482cd038dSYoshinobu Inoue 				 */
51531d4137bSSUZUKI Shinsuke 				m0 = m->m_nextpkt;
51631d4137bSSUZUKI Shinsuke 				m->m_nextpkt = NULL;
5176e6b3f7cSQing Li 				ln->la_hold = m0;
51831d4137bSSUZUKI Shinsuke 				clear_llinfo_pqueue(ln);
51982cd038dSYoshinobu Inoue 			}
52063a97a40SNavdeep Parhar 			EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_TIMEDOUT);
5216e6b3f7cSQing Li 			(void)nd6_free(ln, 0);
522743eee66SSUZUKI Shinsuke 			ln = NULL;
523e6950476SBjoern A. Zeeb 			if (m != NULL)
524e6950476SBjoern A. Zeeb 				icmp6_error2(m, ICMP6_DST_UNREACH,
525e6950476SBjoern A. Zeeb 				    ICMP6_DST_UNREACH_ADDR, 0, ifp);
52682cd038dSYoshinobu Inoue 		}
52782cd038dSYoshinobu Inoue 		break;
52882cd038dSYoshinobu Inoue 	case ND6_LLINFO_REACHABLE:
529743eee66SSUZUKI Shinsuke 		if (!ND6_LLINFO_PERMANENT(ln)) {
53082cd038dSYoshinobu Inoue 			ln->ln_state = ND6_LLINFO_STALE;
531e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz);
53233841545SHajimu UMEMOTO 		}
53382cd038dSYoshinobu Inoue 		break;
53433841545SHajimu UMEMOTO 
53533841545SHajimu UMEMOTO 	case ND6_LLINFO_STALE:
53633841545SHajimu UMEMOTO 		/* Garbage Collection(RFC 2461 5.3) */
537743eee66SSUZUKI Shinsuke 		if (!ND6_LLINFO_PERMANENT(ln)) {
53863a97a40SNavdeep Parhar 			EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
5396e6b3f7cSQing Li 			(void)nd6_free(ln, 1);
540743eee66SSUZUKI Shinsuke 			ln = NULL;
541743eee66SSUZUKI Shinsuke 		}
54233841545SHajimu UMEMOTO 		break;
54333841545SHajimu UMEMOTO 
54482cd038dSYoshinobu Inoue 	case ND6_LLINFO_DELAY:
545686cdd19SJun-ichiro itojun Hagino 		if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) {
546686cdd19SJun-ichiro itojun Hagino 			/* We need NUD */
5476e6b3f7cSQing Li 			ln->la_asked = 1;
54882cd038dSYoshinobu Inoue 			ln->ln_state = ND6_LLINFO_PROBE;
549e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
550e6950476SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
551743eee66SSUZUKI Shinsuke 			nd6_ns_output(ifp, dst, dst, ln, 0);
552e6950476SBjoern A. Zeeb 			LLE_WLOCK(ln);
55333841545SHajimu UMEMOTO 		} else {
554686cdd19SJun-ichiro itojun Hagino 			ln->ln_state = ND6_LLINFO_STALE; /* XXX */
555e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz);
55633841545SHajimu UMEMOTO 		}
55782cd038dSYoshinobu Inoue 		break;
55882cd038dSYoshinobu Inoue 	case ND6_LLINFO_PROBE:
5596e6b3f7cSQing Li 		if (ln->la_asked < V_nd6_umaxtries) {
5606e6b3f7cSQing Li 			ln->la_asked++;
561e6950476SBjoern A. Zeeb 			nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000);
562e6950476SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
563743eee66SSUZUKI Shinsuke 			nd6_ns_output(ifp, dst, dst, ln, 0);
564e6950476SBjoern A. Zeeb 			LLE_WLOCK(ln);
56582cd038dSYoshinobu Inoue 		} else {
56663a97a40SNavdeep Parhar 			EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED);
5676e6b3f7cSQing Li 			(void)nd6_free(ln, 0);
568743eee66SSUZUKI Shinsuke 			ln = NULL;
56982cd038dSYoshinobu Inoue 		}
57082cd038dSYoshinobu Inoue 		break;
571e6950476SBjoern A. Zeeb 	default:
572e6950476SBjoern A. Zeeb 		panic("%s: paths in a dark night can be confusing: %d",
573e6950476SBjoern A. Zeeb 		    __func__, ln->ln_state);
57482cd038dSYoshinobu Inoue 	}
5756e6b3f7cSQing Li done:
5766e6b3f7cSQing Li 	if (ln != NULL)
577e6950476SBjoern A. Zeeb 		LLE_FREE_LOCKED(ln);
578f0c0b143SHajimu UMEMOTO 	CURVNET_RESTORE();
57982cd038dSYoshinobu Inoue }
58082cd038dSYoshinobu Inoue 
581743eee66SSUZUKI Shinsuke 
582743eee66SSUZUKI Shinsuke /*
583743eee66SSUZUKI Shinsuke  * ND6 timer routine to expire default route list and prefix list
584743eee66SSUZUKI Shinsuke  */
585743eee66SSUZUKI Shinsuke void
5868b615593SMarko Zec nd6_timer(void *arg)
587743eee66SSUZUKI Shinsuke {
58821ca7b57SMarko Zec 	CURVNET_SET((struct vnet *) arg);
5893b0b2840SJohn Baldwin 	struct nd_defrouter *dr, *ndr;
5903b0b2840SJohn Baldwin 	struct nd_prefix *pr, *npr;
591743eee66SSUZUKI Shinsuke 	struct in6_ifaddr *ia6, *nia6;
592743eee66SSUZUKI Shinsuke 
593603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz,
594f6dfe47aSMarko Zec 	    nd6_timer, curvnet);
595743eee66SSUZUKI Shinsuke 
59633841545SHajimu UMEMOTO 	/* expire default router list */
5973b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
5987d26db17SHiroki Sato 		if (dr->expire && dr->expire < time_uptime)
59982cd038dSYoshinobu Inoue 			defrtrlist_del(dr);
600686cdd19SJun-ichiro itojun Hagino 	}
60182cd038dSYoshinobu Inoue 
60233841545SHajimu UMEMOTO 	/*
60333841545SHajimu UMEMOTO 	 * expire interface addresses.
60433841545SHajimu UMEMOTO 	 * in the past the loop was inside prefix expiry processing.
60533841545SHajimu UMEMOTO 	 * However, from a stricter speci-confrmance standpoint, we should
60633841545SHajimu UMEMOTO 	 * rather separate address lifetimes and prefix lifetimes.
607d1da0a06SRobert Watson 	 *
608d1da0a06SRobert Watson 	 * XXXRW: in6_ifaddrhead locking.
60933841545SHajimu UMEMOTO 	 */
61033841545SHajimu UMEMOTO   addrloop:
61180af0152SRobert Watson 	TAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) {
61282cd038dSYoshinobu Inoue 		/* check address lifetime */
61333841545SHajimu UMEMOTO 		if (IFA6_IS_INVALID(ia6)) {
61433841545SHajimu UMEMOTO 			int regen = 0;
61533841545SHajimu UMEMOTO 
61633841545SHajimu UMEMOTO 			/*
61733841545SHajimu UMEMOTO 			 * If the expiring address is temporary, try
61833841545SHajimu UMEMOTO 			 * regenerating a new one.  This would be useful when
61988ff5695SSUZUKI Shinsuke 			 * we suspended a laptop PC, then turned it on after a
62033841545SHajimu UMEMOTO 			 * period that could invalidate all temporary
62133841545SHajimu UMEMOTO 			 * addresses.  Although we may have to restart the
62233841545SHajimu UMEMOTO 			 * loop (see below), it must be after purging the
62333841545SHajimu UMEMOTO 			 * address.  Otherwise, we'd see an infinite loop of
62433841545SHajimu UMEMOTO 			 * regeneration.
62533841545SHajimu UMEMOTO 			 */
626603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
62733841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) {
62833841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0)
62933841545SHajimu UMEMOTO 					regen = 1;
63033841545SHajimu UMEMOTO 			}
63133841545SHajimu UMEMOTO 
63233841545SHajimu UMEMOTO 			in6_purgeaddr(&ia6->ia_ifa);
63333841545SHajimu UMEMOTO 
63433841545SHajimu UMEMOTO 			if (regen)
63533841545SHajimu UMEMOTO 				goto addrloop; /* XXX: see below */
63643068328SHajimu UMEMOTO 		} else if (IFA6_IS_DEPRECATED(ia6)) {
63733841545SHajimu UMEMOTO 			int oldflags = ia6->ia6_flags;
63833841545SHajimu UMEMOTO 
63982cd038dSYoshinobu Inoue 			ia6->ia6_flags |= IN6_IFF_DEPRECATED;
64033841545SHajimu UMEMOTO 
64133841545SHajimu UMEMOTO 			/*
64233841545SHajimu UMEMOTO 			 * If a temporary address has just become deprecated,
64333841545SHajimu UMEMOTO 			 * regenerate a new one if possible.
64433841545SHajimu UMEMOTO 			 */
645603724d3SBjoern A. Zeeb 			if (V_ip6_use_tempaddr &&
64633841545SHajimu UMEMOTO 			    (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
64733841545SHajimu UMEMOTO 			    (oldflags & IN6_IFF_DEPRECATED) == 0) {
64833841545SHajimu UMEMOTO 
64933841545SHajimu UMEMOTO 				if (regen_tmpaddr(ia6) == 0) {
65033841545SHajimu UMEMOTO 					/*
65133841545SHajimu UMEMOTO 					 * A new temporary address is
65233841545SHajimu UMEMOTO 					 * generated.
65333841545SHajimu UMEMOTO 					 * XXX: this means the address chain
65433841545SHajimu UMEMOTO 					 * has changed while we are still in
65533841545SHajimu UMEMOTO 					 * the loop.  Although the change
65633841545SHajimu UMEMOTO 					 * would not cause disaster (because
65788ff5695SSUZUKI Shinsuke 					 * it's not a deletion, but an
65888ff5695SSUZUKI Shinsuke 					 * addition,) we'd rather restart the
65933841545SHajimu UMEMOTO 					 * loop just for safety.  Or does this
66033841545SHajimu UMEMOTO 					 * significantly reduce performance??
66133841545SHajimu UMEMOTO 					 */
66233841545SHajimu UMEMOTO 					goto addrloop;
66333841545SHajimu UMEMOTO 				}
66433841545SHajimu UMEMOTO 			}
66583649f07SHajimu UMEMOTO 		} else {
66633841545SHajimu UMEMOTO 			/*
66733841545SHajimu UMEMOTO 			 * A new RA might have made a deprecated address
66833841545SHajimu UMEMOTO 			 * preferred.
66933841545SHajimu UMEMOTO 			 */
67033841545SHajimu UMEMOTO 			ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
67182cd038dSYoshinobu Inoue 		}
67282cd038dSYoshinobu Inoue 	}
67382cd038dSYoshinobu Inoue 
67433841545SHajimu UMEMOTO 	/* expire prefix list */
6753b0b2840SJohn Baldwin 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
67682cd038dSYoshinobu Inoue 		/*
67782cd038dSYoshinobu Inoue 		 * check prefix lifetime.
67882cd038dSYoshinobu Inoue 		 * since pltime is just for autoconf, pltime processing for
67982cd038dSYoshinobu Inoue 		 * prefix is not necessary.
68082cd038dSYoshinobu Inoue 		 */
681743eee66SSUZUKI Shinsuke 		if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME &&
6827d26db17SHiroki Sato 		    time_uptime - pr->ndpr_lastupdate > pr->ndpr_vltime) {
68382cd038dSYoshinobu Inoue 
68482cd038dSYoshinobu Inoue 			/*
68582cd038dSYoshinobu Inoue 			 * address expiration and prefix expiration are
68633841545SHajimu UMEMOTO 			 * separate.  NEVER perform in6_purgeaddr here.
68782cd038dSYoshinobu Inoue 			 */
68882cd038dSYoshinobu Inoue 			prelist_remove(pr);
6893b0b2840SJohn Baldwin 		}
69082cd038dSYoshinobu Inoue 	}
6918b615593SMarko Zec 	CURVNET_RESTORE();
69282cd038dSYoshinobu Inoue }
69382cd038dSYoshinobu Inoue 
6941272577eSXin LI /*
6951272577eSXin LI  * ia6 - deprecated/invalidated temporary address
6961272577eSXin LI  */
69733841545SHajimu UMEMOTO static int
6981272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6)
69933841545SHajimu UMEMOTO {
70033841545SHajimu UMEMOTO 	struct ifaddr *ifa;
70133841545SHajimu UMEMOTO 	struct ifnet *ifp;
70233841545SHajimu UMEMOTO 	struct in6_ifaddr *public_ifa6 = NULL;
70333841545SHajimu UMEMOTO 
70433841545SHajimu UMEMOTO 	ifp = ia6->ia_ifa.ifa_ifp;
705137f91e8SJohn Baldwin 	IF_ADDR_RLOCK(ifp);
706c4dd3fe1SRobert Watson 	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
70733841545SHajimu UMEMOTO 		struct in6_ifaddr *it6;
70833841545SHajimu UMEMOTO 
70933841545SHajimu UMEMOTO 		if (ifa->ifa_addr->sa_family != AF_INET6)
71033841545SHajimu UMEMOTO 			continue;
71133841545SHajimu UMEMOTO 
71233841545SHajimu UMEMOTO 		it6 = (struct in6_ifaddr *)ifa;
71333841545SHajimu UMEMOTO 
71433841545SHajimu UMEMOTO 		/* ignore no autoconf addresses. */
71533841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
71633841545SHajimu UMEMOTO 			continue;
71733841545SHajimu UMEMOTO 
71833841545SHajimu UMEMOTO 		/* ignore autoconf addresses with different prefixes. */
71933841545SHajimu UMEMOTO 		if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
72033841545SHajimu UMEMOTO 			continue;
72133841545SHajimu UMEMOTO 
72233841545SHajimu UMEMOTO 		/*
72333841545SHajimu UMEMOTO 		 * Now we are looking at an autoconf address with the same
72433841545SHajimu UMEMOTO 		 * prefix as ours.  If the address is temporary and is still
72533841545SHajimu UMEMOTO 		 * preferred, do not create another one.  It would be rare, but
72633841545SHajimu UMEMOTO 		 * could happen, for example, when we resume a laptop PC after
72733841545SHajimu UMEMOTO 		 * a long period.
72833841545SHajimu UMEMOTO 		 */
72933841545SHajimu UMEMOTO 		if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
73033841545SHajimu UMEMOTO 		    !IFA6_IS_DEPRECATED(it6)) {
73133841545SHajimu UMEMOTO 			public_ifa6 = NULL;
73233841545SHajimu UMEMOTO 			break;
73333841545SHajimu UMEMOTO 		}
73433841545SHajimu UMEMOTO 
73533841545SHajimu UMEMOTO 		/*
73633841545SHajimu UMEMOTO 		 * This is a public autoconf address that has the same prefix
73733841545SHajimu UMEMOTO 		 * as ours.  If it is preferred, keep it.  We can't break the
73833841545SHajimu UMEMOTO 		 * loop here, because there may be a still-preferred temporary
73933841545SHajimu UMEMOTO 		 * address with the prefix.
74033841545SHajimu UMEMOTO 		 */
74133841545SHajimu UMEMOTO 		if (!IFA6_IS_DEPRECATED(it6))
74233841545SHajimu UMEMOTO 		    public_ifa6 = it6;
743c1752bcdSQing Li 
744c1752bcdSQing Li 		if (public_ifa6 != NULL)
745c1752bcdSQing Li 			ifa_ref(&public_ifa6->ia_ifa);
74633841545SHajimu UMEMOTO 	}
747137f91e8SJohn Baldwin 	IF_ADDR_RUNLOCK(ifp);
74833841545SHajimu UMEMOTO 
74933841545SHajimu UMEMOTO 	if (public_ifa6 != NULL) {
75033841545SHajimu UMEMOTO 		int e;
75133841545SHajimu UMEMOTO 
752743eee66SSUZUKI Shinsuke 		if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
753c1752bcdSQing Li 			ifa_free(&public_ifa6->ia_ifa);
75433841545SHajimu UMEMOTO 			log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
75533841545SHajimu UMEMOTO 			    " tmp addr,errno=%d\n", e);
75633841545SHajimu UMEMOTO 			return (-1);
75733841545SHajimu UMEMOTO 		}
758c1752bcdSQing Li 		ifa_free(&public_ifa6->ia_ifa);
75933841545SHajimu UMEMOTO 		return (0);
76033841545SHajimu UMEMOTO 	}
76133841545SHajimu UMEMOTO 
76233841545SHajimu UMEMOTO 	return (-1);
76333841545SHajimu UMEMOTO }
76433841545SHajimu UMEMOTO 
765686cdd19SJun-ichiro itojun Hagino /*
766686cdd19SJun-ichiro itojun Hagino  * Nuke neighbor cache/prefix/default router management table, right before
767686cdd19SJun-ichiro itojun Hagino  * ifp goes away.
768686cdd19SJun-ichiro itojun Hagino  */
769686cdd19SJun-ichiro itojun Hagino void
7701272577eSXin LI nd6_purge(struct ifnet *ifp)
771686cdd19SJun-ichiro itojun Hagino {
772743eee66SSUZUKI Shinsuke 	struct nd_defrouter *dr, *ndr;
773686cdd19SJun-ichiro itojun Hagino 	struct nd_prefix *pr, *npr;
774686cdd19SJun-ichiro itojun Hagino 
775686cdd19SJun-ichiro itojun Hagino 	/*
776743eee66SSUZUKI Shinsuke 	 * Nuke default router list entries toward ifp.
777743eee66SSUZUKI Shinsuke 	 * We defer removal of default router list entries that is installed
778743eee66SSUZUKI Shinsuke 	 * in the routing table, in order to keep additional side effects as
779743eee66SSUZUKI Shinsuke 	 * small as possible.
780686cdd19SJun-ichiro itojun Hagino 	 */
7813b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
782743eee66SSUZUKI Shinsuke 		if (dr->installed)
783743eee66SSUZUKI Shinsuke 			continue;
784743eee66SSUZUKI Shinsuke 
785686cdd19SJun-ichiro itojun Hagino 		if (dr->ifp == ifp)
786686cdd19SJun-ichiro itojun Hagino 			defrtrlist_del(dr);
787686cdd19SJun-ichiro itojun Hagino 	}
788743eee66SSUZUKI Shinsuke 
7893b0b2840SJohn Baldwin 	TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) {
790743eee66SSUZUKI Shinsuke 		if (!dr->installed)
791743eee66SSUZUKI Shinsuke 			continue;
792743eee66SSUZUKI Shinsuke 
793686cdd19SJun-ichiro itojun Hagino 		if (dr->ifp == ifp)
794686cdd19SJun-ichiro itojun Hagino 			defrtrlist_del(dr);
795686cdd19SJun-ichiro itojun Hagino 	}
796686cdd19SJun-ichiro itojun Hagino 
797686cdd19SJun-ichiro itojun Hagino 	/* Nuke prefix list entries toward ifp */
7983b0b2840SJohn Baldwin 	LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) {
799686cdd19SJun-ichiro itojun Hagino 		if (pr->ndpr_ifp == ifp) {
80033841545SHajimu UMEMOTO 			/*
801743eee66SSUZUKI Shinsuke 			 * Because if_detach() does *not* release prefixes
802743eee66SSUZUKI Shinsuke 			 * while purging addresses the reference count will
803743eee66SSUZUKI Shinsuke 			 * still be above zero. We therefore reset it to
804743eee66SSUZUKI Shinsuke 			 * make sure that the prefix really gets purged.
805743eee66SSUZUKI Shinsuke 			 */
806743eee66SSUZUKI Shinsuke 			pr->ndpr_refcnt = 0;
807743eee66SSUZUKI Shinsuke 
808743eee66SSUZUKI Shinsuke 			/*
80933841545SHajimu UMEMOTO 			 * Previously, pr->ndpr_addr is removed as well,
81033841545SHajimu UMEMOTO 			 * but I strongly believe we don't have to do it.
81133841545SHajimu UMEMOTO 			 * nd6_purge() is only called from in6_ifdetach(),
81233841545SHajimu UMEMOTO 			 * which removes all the associated interface addresses
81333841545SHajimu UMEMOTO 			 * by itself.
81433841545SHajimu UMEMOTO 			 * (jinmei@kame.net 20010129)
81533841545SHajimu UMEMOTO 			 */
816686cdd19SJun-ichiro itojun Hagino 			prelist_remove(pr);
817686cdd19SJun-ichiro itojun Hagino 		}
818686cdd19SJun-ichiro itojun Hagino 	}
819686cdd19SJun-ichiro itojun Hagino 
820686cdd19SJun-ichiro itojun Hagino 	/* cancel default outgoing interface setting */
821603724d3SBjoern A. Zeeb 	if (V_nd6_defifindex == ifp->if_index)
822686cdd19SJun-ichiro itojun Hagino 		nd6_setdefaultiface(0);
823686cdd19SJun-ichiro itojun Hagino 
824e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
825a283298cSHiroki Sato 		/* Refresh default router list. */
826686cdd19SJun-ichiro itojun Hagino 		defrouter_select();
8276e6b3f7cSQing Li 	}
8286e6b3f7cSQing Li 
8296e6b3f7cSQing Li 	/* XXXXX
8306e6b3f7cSQing Li 	 * We do not nuke the neighbor cache entries here any more
8316e6b3f7cSQing Li 	 * because the neighbor cache is kept in if_afdata[AF_INET6].
8326e6b3f7cSQing Li 	 * nd6_purge() is invoked by in6_ifdetach() which is called
8336e6b3f7cSQing Li 	 * from if_detach() where everything gets purged. So let
8346e6b3f7cSQing Li 	 * in6_domifdetach() do the actual L2 table purging work.
8356e6b3f7cSQing Li 	 */
8361026ccc4SHajimu UMEMOTO }
837686cdd19SJun-ichiro itojun Hagino 
838686cdd19SJun-ichiro itojun Hagino /*
8396e6b3f7cSQing Li  * the caller acquires and releases the lock on the lltbls
8406e6b3f7cSQing Li  * Returns the llentry locked
841686cdd19SJun-ichiro itojun Hagino  */
8426e6b3f7cSQing Li struct llentry *
8436e6b3f7cSQing Li nd6_lookup(struct in6_addr *addr6, int flags, struct ifnet *ifp)
84482cd038dSYoshinobu Inoue {
84582cd038dSYoshinobu Inoue 	struct sockaddr_in6 sin6;
8466e6b3f7cSQing Li 	struct llentry *ln;
84768352503SBjoern A. Zeeb 	int llflags;
84882cd038dSYoshinobu Inoue 
84982cd038dSYoshinobu Inoue 	bzero(&sin6, sizeof(sin6));
85082cd038dSYoshinobu Inoue 	sin6.sin6_len = sizeof(struct sockaddr_in6);
85182cd038dSYoshinobu Inoue 	sin6.sin6_family = AF_INET6;
85282cd038dSYoshinobu Inoue 	sin6.sin6_addr = *addr6;
853686cdd19SJun-ichiro itojun Hagino 
8546e6b3f7cSQing Li 	IF_AFDATA_LOCK_ASSERT(ifp);
85582cd038dSYoshinobu Inoue 
85668352503SBjoern A. Zeeb 	llflags = 0;
8576e6b3f7cSQing Li 	if (flags & ND6_CREATE)
8586e6b3f7cSQing Li 	    llflags |= LLE_CREATE;
8596e6b3f7cSQing Li 	if (flags & ND6_EXCLUSIVE)
8606e6b3f7cSQing Li 	    llflags |= LLE_EXCLUSIVE;
8616e6b3f7cSQing Li 
8626e6b3f7cSQing Li 	ln = lla_lookup(LLTABLE6(ifp), llflags, (struct sockaddr *)&sin6);
86368352503SBjoern A. Zeeb 	if ((ln != NULL) && (llflags & LLE_CREATE))
86482cd038dSYoshinobu Inoue 		ln->ln_state = ND6_LLINFO_NOSTATE;
8656e6b3f7cSQing Li 
8666e6b3f7cSQing Li 	return (ln);
86782cd038dSYoshinobu Inoue }
86882cd038dSYoshinobu Inoue 
86982cd038dSYoshinobu Inoue /*
87077b691e0SBrian Feldman  * Test whether a given IPv6 address is a neighbor or not, ignoring
87177b691e0SBrian Feldman  * the actual neighbor cache.  The neighbor cache is ignored in order
87277b691e0SBrian Feldman  * to not reenter the routing code from within itself.
87382cd038dSYoshinobu Inoue  */
87477b691e0SBrian Feldman static int
8751272577eSXin LI nd6_is_new_addr_neighbor(struct sockaddr_in6 *addr, struct ifnet *ifp)
87682cd038dSYoshinobu Inoue {
8774208ea14SHajimu UMEMOTO 	struct nd_prefix *pr;
878743eee66SSUZUKI Shinsuke 	struct ifaddr *dstaddr;
87982cd038dSYoshinobu Inoue 
880686cdd19SJun-ichiro itojun Hagino 	/*
881686cdd19SJun-ichiro itojun Hagino 	 * A link-local address is always a neighbor.
8824208ea14SHajimu UMEMOTO 	 * XXX: a link does not necessarily specify a single interface.
883686cdd19SJun-ichiro itojun Hagino 	 */
884a1f7e5f8SHajimu UMEMOTO 	if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
885a1f7e5f8SHajimu UMEMOTO 		struct sockaddr_in6 sin6_copy;
886a1f7e5f8SHajimu UMEMOTO 		u_int32_t zone;
887a1f7e5f8SHajimu UMEMOTO 
888a1f7e5f8SHajimu UMEMOTO 		/*
889a1f7e5f8SHajimu UMEMOTO 		 * We need sin6_copy since sa6_recoverscope() may modify the
890a1f7e5f8SHajimu UMEMOTO 		 * content (XXX).
891a1f7e5f8SHajimu UMEMOTO 		 */
892a1f7e5f8SHajimu UMEMOTO 		sin6_copy = *addr;
893a1f7e5f8SHajimu UMEMOTO 		if (sa6_recoverscope(&sin6_copy))
894a1f7e5f8SHajimu UMEMOTO 			return (0); /* XXX: should be impossible */
895a1f7e5f8SHajimu UMEMOTO 		if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
896a1f7e5f8SHajimu UMEMOTO 			return (0);
897a1f7e5f8SHajimu UMEMOTO 		if (sin6_copy.sin6_scope_id == zone)
89882cd038dSYoshinobu Inoue 			return (1);
899a1f7e5f8SHajimu UMEMOTO 		else
900a1f7e5f8SHajimu UMEMOTO 			return (0);
901a1f7e5f8SHajimu UMEMOTO 	}
90282cd038dSYoshinobu Inoue 
90382cd038dSYoshinobu Inoue 	/*
90482cd038dSYoshinobu Inoue 	 * If the address matches one of our addresses,
90582cd038dSYoshinobu Inoue 	 * it should be a neighbor.
9064208ea14SHajimu UMEMOTO 	 * If the address matches one of our on-link prefixes, it should be a
9074208ea14SHajimu UMEMOTO 	 * neighbor.
90882cd038dSYoshinobu Inoue 	 */
9093b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
9104208ea14SHajimu UMEMOTO 		if (pr->ndpr_ifp != ifp)
9114208ea14SHajimu UMEMOTO 			continue;
91282cd038dSYoshinobu Inoue 
913baf7c373SQing Li 		if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) {
914baf7c373SQing Li 			struct rtentry *rt;
91581d5d46bSBjoern A. Zeeb 
91681d5d46bSBjoern A. Zeeb 			/* Always use the default FIB here. */
91781d5d46bSBjoern A. Zeeb 			rt = in6_rtalloc1((struct sockaddr *)&pr->ndpr_prefix,
91881d5d46bSBjoern A. Zeeb 			    0, 0, RT_DEFAULT_FIB);
919baf7c373SQing Li 			if (rt == NULL)
9204208ea14SHajimu UMEMOTO 				continue;
921baf7c373SQing Li 			/*
922baf7c373SQing Li 			 * This is the case where multiple interfaces
923baf7c373SQing Li 			 * have the same prefix, but only one is installed
924baf7c373SQing Li 			 * into the routing table and that prefix entry
925baf7c373SQing Li 			 * is not the one being examined here. In the case
926baf7c373SQing Li 			 * where RADIX_MPATH is enabled, multiple route
927baf7c373SQing Li 			 * entries (of the same rt_key value) will be
928baf7c373SQing Li 			 * installed because the interface addresses all
929baf7c373SQing Li 			 * differ.
930baf7c373SQing Li 			 */
931baf7c373SQing Li 			if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
932baf7c373SQing Li 			       &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr)) {
933baf7c373SQing Li 				RTFREE_LOCKED(rt);
934baf7c373SQing Li 				continue;
935baf7c373SQing Li 			}
936baf7c373SQing Li 			RTFREE_LOCKED(rt);
937baf7c373SQing Li 		}
9384208ea14SHajimu UMEMOTO 
9394208ea14SHajimu UMEMOTO 		if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
9404208ea14SHajimu UMEMOTO 		    &addr->sin6_addr, &pr->ndpr_mask))
9414208ea14SHajimu UMEMOTO 			return (1);
94282cd038dSYoshinobu Inoue 	}
9434208ea14SHajimu UMEMOTO 
9444208ea14SHajimu UMEMOTO 	/*
945743eee66SSUZUKI Shinsuke 	 * If the address is assigned on the node of the other side of
946743eee66SSUZUKI Shinsuke 	 * a p2p interface, the address should be a neighbor.
947743eee66SSUZUKI Shinsuke 	 */
948743eee66SSUZUKI Shinsuke 	dstaddr = ifa_ifwithdstaddr((struct sockaddr *)addr);
9498c0fec80SRobert Watson 	if (dstaddr != NULL) {
9508c0fec80SRobert Watson 		if (dstaddr->ifa_ifp == ifp) {
9518c0fec80SRobert Watson 			ifa_free(dstaddr);
952743eee66SSUZUKI Shinsuke 			return (1);
9538c0fec80SRobert Watson 		}
9548c0fec80SRobert Watson 		ifa_free(dstaddr);
9558c0fec80SRobert Watson 	}
956743eee66SSUZUKI Shinsuke 
957743eee66SSUZUKI Shinsuke 	/*
9584208ea14SHajimu UMEMOTO 	 * If the default router list is empty, all addresses are regarded
9594208ea14SHajimu UMEMOTO 	 * as on-link, and thus, as a neighbor.
9604208ea14SHajimu UMEMOTO 	 */
961e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV &&
9623b0b2840SJohn Baldwin 	    TAILQ_EMPTY(&V_nd_defrouter) &&
963603724d3SBjoern A. Zeeb 	    V_nd6_defifindex == ifp->if_index) {
96482cd038dSYoshinobu Inoue 		return (1);
96582cd038dSYoshinobu Inoue 	}
96682cd038dSYoshinobu Inoue 
96777b691e0SBrian Feldman 	return (0);
96877b691e0SBrian Feldman }
96977b691e0SBrian Feldman 
97077b691e0SBrian Feldman 
97177b691e0SBrian Feldman /*
97277b691e0SBrian Feldman  * Detect if a given IPv6 address identifies a neighbor on a given link.
97377b691e0SBrian Feldman  * XXX: should take care of the destination of a p2p link?
97477b691e0SBrian Feldman  */
97577b691e0SBrian Feldman int
9761272577eSXin LI nd6_is_addr_neighbor(struct sockaddr_in6 *addr, struct ifnet *ifp)
97777b691e0SBrian Feldman {
9786e6b3f7cSQing Li 	struct llentry *lle;
9796e6b3f7cSQing Li 	int rc = 0;
98077b691e0SBrian Feldman 
9816e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
98277b691e0SBrian Feldman 	if (nd6_is_new_addr_neighbor(addr, ifp))
98377b691e0SBrian Feldman 		return (1);
98477b691e0SBrian Feldman 
98582cd038dSYoshinobu Inoue 	/*
98682cd038dSYoshinobu Inoue 	 * Even if the address matches none of our addresses, it might be
98782cd038dSYoshinobu Inoue 	 * in the neighbor cache.
98882cd038dSYoshinobu Inoue 	 */
98973cb2f38SAndrey V. Elsukov 	IF_AFDATA_RLOCK(ifp);
9906e6b3f7cSQing Li 	if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) {
9916e6b3f7cSQing Li 		LLE_RUNLOCK(lle);
9926e6b3f7cSQing Li 		rc = 1;
9936e6b3f7cSQing Li 	}
99473cb2f38SAndrey V. Elsukov 	IF_AFDATA_RUNLOCK(ifp);
9956e6b3f7cSQing Li 	return (rc);
99682cd038dSYoshinobu Inoue }
99782cd038dSYoshinobu Inoue 
99882cd038dSYoshinobu Inoue /*
99982cd038dSYoshinobu Inoue  * Free an nd6 llinfo entry.
1000743eee66SSUZUKI Shinsuke  * Since the function would cause significant changes in the kernel, DO NOT
1001743eee66SSUZUKI Shinsuke  * make it global, unless you have a strong reason for the change, and are sure
1002743eee66SSUZUKI Shinsuke  * that the change is safe.
100382cd038dSYoshinobu Inoue  */
10046e6b3f7cSQing Li static struct llentry *
10056e6b3f7cSQing Li nd6_free(struct llentry *ln, int gc)
100682cd038dSYoshinobu Inoue {
10076e6b3f7cSQing Li         struct llentry *next;
100882cd038dSYoshinobu Inoue 	struct nd_defrouter *dr;
1009e6950476SBjoern A. Zeeb 	struct ifnet *ifp;
1010e6950476SBjoern A. Zeeb 
1011e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
101282cd038dSYoshinobu Inoue 
101382cd038dSYoshinobu Inoue 	/*
101433841545SHajimu UMEMOTO 	 * we used to have pfctlinput(PRC_HOSTDEAD) here.
101533841545SHajimu UMEMOTO 	 * even though it is not harmful, it was not really necessary.
101682cd038dSYoshinobu Inoue 	 */
1017686cdd19SJun-ichiro itojun Hagino 
1018743eee66SSUZUKI Shinsuke 	/* cancel timer */
1019e6950476SBjoern A. Zeeb 	nd6_llinfo_settimer_locked(ln, -1);
1020e6950476SBjoern A. Zeeb 
1021e6950476SBjoern A. Zeeb 	ifp = ln->lle_tbl->llt_ifp;
1022743eee66SSUZUKI Shinsuke 
1023e7fa8d0aSHiroki Sato 	if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
1024e6950476SBjoern A. Zeeb 		dr = defrouter_lookup(&L3_ADDR_SIN6(ln)->sin6_addr, ifp);
102533841545SHajimu UMEMOTO 
1026743eee66SSUZUKI Shinsuke 		if (dr != NULL && dr->expire &&
1027743eee66SSUZUKI Shinsuke 		    ln->ln_state == ND6_LLINFO_STALE && gc) {
1028743eee66SSUZUKI Shinsuke 			/*
1029743eee66SSUZUKI Shinsuke 			 * If the reason for the deletion is just garbage
1030743eee66SSUZUKI Shinsuke 			 * collection, and the neighbor is an active default
1031743eee66SSUZUKI Shinsuke 			 * router, do not delete it.  Instead, reset the GC
1032743eee66SSUZUKI Shinsuke 			 * timer using the router's lifetime.
1033743eee66SSUZUKI Shinsuke 			 * Simply deleting the entry would affect default
1034743eee66SSUZUKI Shinsuke 			 * router selection, which is not necessarily a good
1035743eee66SSUZUKI Shinsuke 			 * thing, especially when we're using router preference
1036743eee66SSUZUKI Shinsuke 			 * values.
1037743eee66SSUZUKI Shinsuke 			 * XXX: the check for ln_state would be redundant,
1038743eee66SSUZUKI Shinsuke 			 *      but we intentionally keep it just in case.
1039743eee66SSUZUKI Shinsuke 			 */
10407d26db17SHiroki Sato 			if (dr->expire > time_uptime)
1041e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
10427d26db17SHiroki Sato 				    (dr->expire - time_uptime) * hz);
1043743eee66SSUZUKI Shinsuke 			else
1044e6950476SBjoern A. Zeeb 				nd6_llinfo_settimer_locked(ln,
1045e6950476SBjoern A. Zeeb 				    (long)V_nd6_gctimer * hz);
1046e6950476SBjoern A. Zeeb 
1047e6950476SBjoern A. Zeeb 			next = LIST_NEXT(ln, lle_next);
1048ef8d671cSHajimu UMEMOTO 			LLE_REMREF(ln);
1049ef8d671cSHajimu UMEMOTO 			LLE_WUNLOCK(ln);
1050e6950476SBjoern A. Zeeb 			return (next);
1051743eee66SSUZUKI Shinsuke 		}
1052743eee66SSUZUKI Shinsuke 
1053686cdd19SJun-ichiro itojun Hagino 		if (dr) {
1054686cdd19SJun-ichiro itojun Hagino 			/*
1055686cdd19SJun-ichiro itojun Hagino 			 * Unreachablity of a router might affect the default
1056686cdd19SJun-ichiro itojun Hagino 			 * router selection and on-link detection of advertised
1057686cdd19SJun-ichiro itojun Hagino 			 * prefixes.
1058686cdd19SJun-ichiro itojun Hagino 			 */
1059686cdd19SJun-ichiro itojun Hagino 
1060686cdd19SJun-ichiro itojun Hagino 			/*
1061686cdd19SJun-ichiro itojun Hagino 			 * Temporarily fake the state to choose a new default
1062686cdd19SJun-ichiro itojun Hagino 			 * router and to perform on-link determination of
106388ff5695SSUZUKI Shinsuke 			 * prefixes correctly.
1064686cdd19SJun-ichiro itojun Hagino 			 * Below the state will be set correctly,
1065686cdd19SJun-ichiro itojun Hagino 			 * or the entry itself will be deleted.
1066686cdd19SJun-ichiro itojun Hagino 			 */
1067686cdd19SJun-ichiro itojun Hagino 			ln->ln_state = ND6_LLINFO_INCOMPLETE;
10681d5089c2SBjoern A. Zeeb 		}
1069686cdd19SJun-ichiro itojun Hagino 
10701d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr) {
10711d5089c2SBjoern A. Zeeb 
10721d5089c2SBjoern A. Zeeb 			/*
10731d5089c2SBjoern A. Zeeb 			 * We need to unlock to avoid a LOR with rt6_flush() with the
10741d5089c2SBjoern A. Zeeb 			 * rnh and for the calls to pfxlist_onlink_check() and
10751d5089c2SBjoern A. Zeeb 			 * defrouter_select() in the block further down for calls
10761d5089c2SBjoern A. Zeeb 			 * into nd6_lookup().  We still hold a ref.
10771d5089c2SBjoern A. Zeeb 			 */
10781d5089c2SBjoern A. Zeeb 			LLE_WUNLOCK(ln);
10791d5089c2SBjoern A. Zeeb 
10801d5089c2SBjoern A. Zeeb 			/*
10811d5089c2SBjoern A. Zeeb 			 * rt6_flush must be called whether or not the neighbor
10821d5089c2SBjoern A. Zeeb 			 * is in the Default Router List.
10831d5089c2SBjoern A. Zeeb 			 * See a corresponding comment in nd6_na_input().
10841d5089c2SBjoern A. Zeeb 			 */
10851d5089c2SBjoern A. Zeeb 			rt6_flush(&L3_ADDR_SIN6(ln)->sin6_addr, ifp);
10861d5089c2SBjoern A. Zeeb 		}
10871d5089c2SBjoern A. Zeeb 
10881d5089c2SBjoern A. Zeeb 		if (dr) {
108933841545SHajimu UMEMOTO 			/*
109033841545SHajimu UMEMOTO 			 * Since defrouter_select() does not affect the
109133841545SHajimu UMEMOTO 			 * on-link determination and MIP6 needs the check
109233841545SHajimu UMEMOTO 			 * before the default router selection, we perform
109333841545SHajimu UMEMOTO 			 * the check now.
109433841545SHajimu UMEMOTO 			 */
109533841545SHajimu UMEMOTO 			pfxlist_onlink_check();
109633841545SHajimu UMEMOTO 
1097686cdd19SJun-ichiro itojun Hagino 			/*
10981d5089c2SBjoern A. Zeeb 			 * Refresh default router list.
1099686cdd19SJun-ichiro itojun Hagino 			 */
1100686cdd19SJun-ichiro itojun Hagino 			defrouter_select();
1101686cdd19SJun-ichiro itojun Hagino 		}
11021d5089c2SBjoern A. Zeeb 
11031d5089c2SBjoern A. Zeeb 		if (ln->ln_router || dr)
11041d5089c2SBjoern A. Zeeb 			LLE_WLOCK(ln);
110582cd038dSYoshinobu Inoue 	}
110682cd038dSYoshinobu Inoue 
110733841545SHajimu UMEMOTO 	/*
110833841545SHajimu UMEMOTO 	 * Before deleting the entry, remember the next entry as the
110933841545SHajimu UMEMOTO 	 * return value.  We need this because pfxlist_onlink_check() above
111033841545SHajimu UMEMOTO 	 * might have freed other entries (particularly the old next entry) as
111133841545SHajimu UMEMOTO 	 * a side effect (XXX).
111233841545SHajimu UMEMOTO 	 */
11136e6b3f7cSQing Li 	next = LIST_NEXT(ln, lle_next);
1114686cdd19SJun-ichiro itojun Hagino 
1115e6950476SBjoern A. Zeeb 	/*
1116e6950476SBjoern A. Zeeb 	 * Save to unlock. We still hold an extra reference and will not
1117e6950476SBjoern A. Zeeb 	 * free(9) in llentry_free() if someone else holds one as well.
1118e6950476SBjoern A. Zeeb 	 */
1119e6950476SBjoern A. Zeeb 	LLE_WUNLOCK(ln);
11206e6b3f7cSQing Li 	IF_AFDATA_LOCK(ifp);
11216e6b3f7cSQing Li 	LLE_WLOCK(ln);
1122b1ec2940SGleb Smirnoff 
1123b1ec2940SGleb Smirnoff 	/* Guard against race with other llentry_free(). */
1124b1ec2940SGleb Smirnoff 	if (ln->la_flags & LLE_LINKED) {
1125becba438SBjoern A. Zeeb 		LLE_REMREF(ln);
11266e6b3f7cSQing Li 		llentry_free(ln);
1127b1ec2940SGleb Smirnoff 	} else
1128b1ec2940SGleb Smirnoff 		LLE_FREE_LOCKED(ln);
1129b1ec2940SGleb Smirnoff 
11306e6b3f7cSQing Li 	IF_AFDATA_UNLOCK(ifp);
113133841545SHajimu UMEMOTO 
113233841545SHajimu UMEMOTO 	return (next);
113382cd038dSYoshinobu Inoue }
113482cd038dSYoshinobu Inoue 
113582cd038dSYoshinobu Inoue /*
113682cd038dSYoshinobu Inoue  * Upper-layer reachability hint for Neighbor Unreachability Detection.
113782cd038dSYoshinobu Inoue  *
1138cd0fdcf7SHajimu UMEMOTO  * XXX cost-effective methods?
113982cd038dSYoshinobu Inoue  */
114082cd038dSYoshinobu Inoue void
11411272577eSXin LI nd6_nud_hint(struct rtentry *rt, struct in6_addr *dst6, int force)
114282cd038dSYoshinobu Inoue {
11436e6b3f7cSQing Li 	struct llentry *ln;
11446e6b3f7cSQing Li 	struct ifnet *ifp;
114582cd038dSYoshinobu Inoue 
11466e6b3f7cSQing Li 	if ((dst6 == NULL) || (rt == NULL))
114782cd038dSYoshinobu Inoue 		return;
114882cd038dSYoshinobu Inoue 
11496e6b3f7cSQing Li 	ifp = rt->rt_ifp;
1150ea0c3776SAndrey V. Elsukov 	IF_AFDATA_RLOCK(ifp);
11516e6b3f7cSQing Li 	ln = nd6_lookup(dst6, ND6_EXCLUSIVE, NULL);
1152ea0c3776SAndrey V. Elsukov 	IF_AFDATA_RUNLOCK(ifp);
11536e6b3f7cSQing Li 	if (ln == NULL)
115482cd038dSYoshinobu Inoue 		return;
115582cd038dSYoshinobu Inoue 
1156ad8d5711SMunechika SUMIKAWA 	if (ln->ln_state < ND6_LLINFO_REACHABLE)
11576e6b3f7cSQing Li 		goto done;
115882cd038dSYoshinobu Inoue 
1159686cdd19SJun-ichiro itojun Hagino 	/*
1160686cdd19SJun-ichiro itojun Hagino 	 * if we get upper-layer reachability confirmation many times,
1161686cdd19SJun-ichiro itojun Hagino 	 * it is possible we have false information.
1162686cdd19SJun-ichiro itojun Hagino 	 */
1163686cdd19SJun-ichiro itojun Hagino 	if (!force) {
1164686cdd19SJun-ichiro itojun Hagino 		ln->ln_byhint++;
11656e6b3f7cSQing Li 		if (ln->ln_byhint > V_nd6_maxnudhint) {
11666e6b3f7cSQing Li 			goto done;
11676e6b3f7cSQing Li 		}
1168686cdd19SJun-ichiro itojun Hagino 	}
1169686cdd19SJun-ichiro itojun Hagino 
117082cd038dSYoshinobu Inoue  	ln->ln_state = ND6_LLINFO_REACHABLE;
1171743eee66SSUZUKI Shinsuke 	if (!ND6_LLINFO_PERMANENT(ln)) {
1172d715e397SBjoern A. Zeeb 		nd6_llinfo_settimer_locked(ln,
1173743eee66SSUZUKI Shinsuke 		    (long)ND_IFINFO(rt->rt_ifp)->reachable * hz);
1174743eee66SSUZUKI Shinsuke 	}
11756e6b3f7cSQing Li done:
11766e6b3f7cSQing Li 	LLE_WUNLOCK(ln);
117782cd038dSYoshinobu Inoue }
117882cd038dSYoshinobu Inoue 
117982cd038dSYoshinobu Inoue 
11800f1aca65SQing Li /*
11810f1aca65SQing Li  * Rejuvenate this function for routing operations related
11820f1aca65SQing Li  * processing.
11830f1aca65SQing Li  */
11840f1aca65SQing Li void
11850f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
11860f1aca65SQing Li {
118739e19560SBjoern A. Zeeb 	struct sockaddr_in6 *gateway;
11880f1aca65SQing Li 	struct nd_defrouter *dr;
118939e19560SBjoern A. Zeeb 	struct ifnet *ifp;
11900f1aca65SQing Li 
11910f1aca65SQing Li 	RT_LOCK_ASSERT(rt);
119239e19560SBjoern A. Zeeb 	gateway = (struct sockaddr_in6 *)rt->rt_gateway;
119339e19560SBjoern A. Zeeb 	ifp = rt->rt_ifp;
11940f1aca65SQing Li 
11950f1aca65SQing Li 	switch (req) {
11960f1aca65SQing Li 	case RTM_ADD:
11970f1aca65SQing Li 		break;
11980f1aca65SQing Li 
11990f1aca65SQing Li 	case RTM_DELETE:
12000f1aca65SQing Li 		if (!ifp)
12010f1aca65SQing Li 			return;
12020f1aca65SQing Li 		/*
12030f1aca65SQing Li 		 * Only indirect routes are interesting.
12040f1aca65SQing Li 		 */
12050f1aca65SQing Li 		if ((rt->rt_flags & RTF_GATEWAY) == 0)
12060f1aca65SQing Li 			return;
12070f1aca65SQing Li 		/*
12080f1aca65SQing Li 		 * check for default route
12090f1aca65SQing Li 		 */
12100f1aca65SQing Li 		if (IN6_ARE_ADDR_EQUAL(&in6addr_any,
12110f1aca65SQing Li 				       &SIN6(rt_key(rt))->sin6_addr)) {
12120f1aca65SQing Li 
12130f1aca65SQing Li 			dr = defrouter_lookup(&gateway->sin6_addr, ifp);
12140f1aca65SQing Li 			if (dr != NULL)
12150f1aca65SQing Li 				dr->installed = 0;
12160f1aca65SQing Li 		}
12170f1aca65SQing Li 		break;
12180f1aca65SQing Li 	}
12190f1aca65SQing Li }
12200f1aca65SQing Li 
12210f1aca65SQing Li 
122282cd038dSYoshinobu Inoue int
12231272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
122482cd038dSYoshinobu Inoue {
122582cd038dSYoshinobu Inoue 	struct in6_drlist *drl = (struct in6_drlist *)data;
1226f95d4633SHajimu UMEMOTO 	struct in6_oprlist *oprl = (struct in6_oprlist *)data;
122782cd038dSYoshinobu Inoue 	struct in6_ndireq *ndi = (struct in6_ndireq *)data;
122882cd038dSYoshinobu Inoue 	struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data;
1229686cdd19SJun-ichiro itojun Hagino 	struct in6_ndifreq *ndif = (struct in6_ndifreq *)data;
1230743eee66SSUZUKI Shinsuke 	struct nd_defrouter *dr;
123182cd038dSYoshinobu Inoue 	struct nd_prefix *pr;
123282cd038dSYoshinobu Inoue 	int i = 0, error = 0;
123382cd038dSYoshinobu Inoue 
12340de0dd9bSHiroki Sato 	if (ifp->if_afdata[AF_INET6] == NULL)
12350de0dd9bSHiroki Sato 		return (EPFNOSUPPORT);
123682cd038dSYoshinobu Inoue 	switch (cmd) {
123782cd038dSYoshinobu Inoue 	case SIOCGDRLST_IN6:
123833841545SHajimu UMEMOTO 		/*
123933841545SHajimu UMEMOTO 		 * obsolete API, use sysctl under net.inet6.icmp6
124033841545SHajimu UMEMOTO 		 */
124182cd038dSYoshinobu Inoue 		bzero(drl, sizeof(*drl));
12423b0b2840SJohn Baldwin 		TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) {
12433b0b2840SJohn Baldwin 			if (i >= DRLSTSIZ)
12443b0b2840SJohn Baldwin 				break;
124582cd038dSYoshinobu Inoue 			drl->defrouter[i].rtaddr = dr->rtaddr;
1246f95d4633SHajimu UMEMOTO 			in6_clearscope(&drl->defrouter[i].rtaddr);
124782cd038dSYoshinobu Inoue 
124882cd038dSYoshinobu Inoue 			drl->defrouter[i].flags = dr->flags;
124982cd038dSYoshinobu Inoue 			drl->defrouter[i].rtlifetime = dr->rtlifetime;
1250ffa0165aSHiroki Sato 			drl->defrouter[i].expire = dr->expire +
1251ffa0165aSHiroki Sato 			    (time_second - time_uptime);
125282cd038dSYoshinobu Inoue 			drl->defrouter[i].if_index = dr->ifp->if_index;
125382cd038dSYoshinobu Inoue 			i++;
125482cd038dSYoshinobu Inoue 		}
125582cd038dSYoshinobu Inoue 		break;
125682cd038dSYoshinobu Inoue 	case SIOCGPRLST_IN6:
1257686cdd19SJun-ichiro itojun Hagino 		/*
125833841545SHajimu UMEMOTO 		 * obsolete API, use sysctl under net.inet6.icmp6
1259f95d4633SHajimu UMEMOTO 		 *
1260f95d4633SHajimu UMEMOTO 		 * XXX the structure in6_prlist was changed in backward-
1261f95d4633SHajimu UMEMOTO 		 * incompatible manner.  in6_oprlist is used for SIOCGPRLST_IN6,
1262f95d4633SHajimu UMEMOTO 		 * in6_prlist is used for nd6_sysctl() - fill_prlist().
126333841545SHajimu UMEMOTO 		 */
126433841545SHajimu UMEMOTO 		/*
1265686cdd19SJun-ichiro itojun Hagino 		 * XXX meaning of fields, especialy "raflags", is very
1266686cdd19SJun-ichiro itojun Hagino 		 * differnet between RA prefix list and RR/static prefix list.
1267686cdd19SJun-ichiro itojun Hagino 		 * how about separating ioctls into two?
1268686cdd19SJun-ichiro itojun Hagino 		 */
1269f95d4633SHajimu UMEMOTO 		bzero(oprl, sizeof(*oprl));
12703b0b2840SJohn Baldwin 		LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
127182cd038dSYoshinobu Inoue 			struct nd_pfxrouter *pfr;
127282cd038dSYoshinobu Inoue 			int j;
127382cd038dSYoshinobu Inoue 
12743b0b2840SJohn Baldwin 			if (i >= PRLSTSIZ)
12753b0b2840SJohn Baldwin 				break;
1276a1f7e5f8SHajimu UMEMOTO 			oprl->prefix[i].prefix = pr->ndpr_prefix.sin6_addr;
1277f95d4633SHajimu UMEMOTO 			oprl->prefix[i].raflags = pr->ndpr_raf;
1278f95d4633SHajimu UMEMOTO 			oprl->prefix[i].prefixlen = pr->ndpr_plen;
1279f95d4633SHajimu UMEMOTO 			oprl->prefix[i].vltime = pr->ndpr_vltime;
1280f95d4633SHajimu UMEMOTO 			oprl->prefix[i].pltime = pr->ndpr_pltime;
1281f95d4633SHajimu UMEMOTO 			oprl->prefix[i].if_index = pr->ndpr_ifp->if_index;
1282743eee66SSUZUKI Shinsuke 			if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
1283743eee66SSUZUKI Shinsuke 				oprl->prefix[i].expire = 0;
1284743eee66SSUZUKI Shinsuke 			else {
1285743eee66SSUZUKI Shinsuke 				time_t maxexpire;
1286743eee66SSUZUKI Shinsuke 
1287743eee66SSUZUKI Shinsuke 				/* XXX: we assume time_t is signed. */
1288743eee66SSUZUKI Shinsuke 				maxexpire = (-1) &
128936dc24e6SSUZUKI Shinsuke 				    ~((time_t)1 <<
129036dc24e6SSUZUKI Shinsuke 				    ((sizeof(maxexpire) * 8) - 1));
1291743eee66SSUZUKI Shinsuke 				if (pr->ndpr_vltime <
1292743eee66SSUZUKI Shinsuke 				    maxexpire - pr->ndpr_lastupdate) {
1293743eee66SSUZUKI Shinsuke 					oprl->prefix[i].expire =
1294743eee66SSUZUKI Shinsuke 					    pr->ndpr_lastupdate +
1295ffa0165aSHiroki Sato 					    pr->ndpr_vltime +
1296ffa0165aSHiroki Sato 					    (time_second - time_uptime);
1297743eee66SSUZUKI Shinsuke 				} else
1298743eee66SSUZUKI Shinsuke 					oprl->prefix[i].expire = maxexpire;
1299743eee66SSUZUKI Shinsuke 			}
130082cd038dSYoshinobu Inoue 
130182cd038dSYoshinobu Inoue 			j = 0;
13023b0b2840SJohn Baldwin 			LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
130382cd038dSYoshinobu Inoue 				if (j < DRLSTSIZ) {
1304f95d4633SHajimu UMEMOTO #define RTRADDR oprl->prefix[i].advrtr[j]
130582cd038dSYoshinobu Inoue 					RTRADDR = pfr->router->rtaddr;
1306f95d4633SHajimu UMEMOTO 					in6_clearscope(&RTRADDR);
130782cd038dSYoshinobu Inoue #undef RTRADDR
130882cd038dSYoshinobu Inoue 				}
130982cd038dSYoshinobu Inoue 				j++;
131082cd038dSYoshinobu Inoue 			}
1311f95d4633SHajimu UMEMOTO 			oprl->prefix[i].advrtrs = j;
1312f95d4633SHajimu UMEMOTO 			oprl->prefix[i].origin = PR_ORIG_RA;
131382cd038dSYoshinobu Inoue 
131482cd038dSYoshinobu Inoue 			i++;
131582cd038dSYoshinobu Inoue 		}
131682cd038dSYoshinobu Inoue 
131782cd038dSYoshinobu Inoue 		break;
131833841545SHajimu UMEMOTO 	case OSIOCGIFINFO_IN6:
13192ce62dceSSUZUKI Shinsuke #define ND	ndi->ndi
132031b1bfe1SHajimu UMEMOTO 		/* XXX: old ndp(8) assumes a positive value for linkmtu. */
13212ce62dceSSUZUKI Shinsuke 		bzero(&ND, sizeof(ND));
13222ce62dceSSUZUKI Shinsuke 		ND.linkmtu = IN6_LINKMTU(ifp);
13232ce62dceSSUZUKI Shinsuke 		ND.maxmtu = ND_IFINFO(ifp)->maxmtu;
13242ce62dceSSUZUKI Shinsuke 		ND.basereachable = ND_IFINFO(ifp)->basereachable;
13252ce62dceSSUZUKI Shinsuke 		ND.reachable = ND_IFINFO(ifp)->reachable;
13262ce62dceSSUZUKI Shinsuke 		ND.retrans = ND_IFINFO(ifp)->retrans;
13272ce62dceSSUZUKI Shinsuke 		ND.flags = ND_IFINFO(ifp)->flags;
13282ce62dceSSUZUKI Shinsuke 		ND.recalctm = ND_IFINFO(ifp)->recalctm;
13292ce62dceSSUZUKI Shinsuke 		ND.chlim = ND_IFINFO(ifp)->chlim;
133033841545SHajimu UMEMOTO 		break;
133182cd038dSYoshinobu Inoue 	case SIOCGIFINFO_IN6:
13322ce62dceSSUZUKI Shinsuke 		ND = *ND_IFINFO(ifp);
133382cd038dSYoshinobu Inoue 		break;
1334b9204379SSUZUKI Shinsuke 	case SIOCSIFINFO_IN6:
1335b9204379SSUZUKI Shinsuke 		/*
1336b9204379SSUZUKI Shinsuke 		 * used to change host variables from userland.
1337b9204379SSUZUKI Shinsuke 		 * intented for a use on router to reflect RA configurations.
1338b9204379SSUZUKI Shinsuke 		 */
1339b9204379SSUZUKI Shinsuke 		/* 0 means 'unspecified' */
1340b9204379SSUZUKI Shinsuke 		if (ND.linkmtu != 0) {
1341b9204379SSUZUKI Shinsuke 			if (ND.linkmtu < IPV6_MMTU ||
1342b9204379SSUZUKI Shinsuke 			    ND.linkmtu > IN6_LINKMTU(ifp)) {
1343b9204379SSUZUKI Shinsuke 				error = EINVAL;
1344b9204379SSUZUKI Shinsuke 				break;
1345b9204379SSUZUKI Shinsuke 			}
1346b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->linkmtu = ND.linkmtu;
1347b9204379SSUZUKI Shinsuke 		}
1348b9204379SSUZUKI Shinsuke 
1349b9204379SSUZUKI Shinsuke 		if (ND.basereachable != 0) {
1350b9204379SSUZUKI Shinsuke 			int obasereachable = ND_IFINFO(ifp)->basereachable;
1351b9204379SSUZUKI Shinsuke 
1352b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->basereachable = ND.basereachable;
1353b9204379SSUZUKI Shinsuke 			if (ND.basereachable != obasereachable)
1354b9204379SSUZUKI Shinsuke 				ND_IFINFO(ifp)->reachable =
1355b9204379SSUZUKI Shinsuke 				    ND_COMPUTE_RTIME(ND.basereachable);
1356b9204379SSUZUKI Shinsuke 		}
1357b9204379SSUZUKI Shinsuke 		if (ND.retrans != 0)
1358b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->retrans = ND.retrans;
1359b9204379SSUZUKI Shinsuke 		if (ND.chlim != 0)
1360b9204379SSUZUKI Shinsuke 			ND_IFINFO(ifp)->chlim = ND.chlim;
1361b9204379SSUZUKI Shinsuke 		/* FALLTHROUGH */
1362686cdd19SJun-ichiro itojun Hagino 	case SIOCSIFINFO_FLAGS:
1363a283298cSHiroki Sato 	{
1364a283298cSHiroki Sato 		struct ifaddr *ifa;
1365a283298cSHiroki Sato 		struct in6_ifaddr *ia;
1366a283298cSHiroki Sato 
1367a283298cSHiroki Sato 		if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1368a283298cSHiroki Sato 		    !(ND.flags & ND6_IFF_IFDISABLED)) {
1369a283298cSHiroki Sato 			/* ifdisabled 1->0 transision */
1370a283298cSHiroki Sato 
1371a283298cSHiroki Sato 			/*
1372a283298cSHiroki Sato 			 * If the interface is marked as ND6_IFF_IFDISABLED and
1373a283298cSHiroki Sato 			 * has an link-local address with IN6_IFF_DUPLICATED,
1374a283298cSHiroki Sato 			 * do not clear ND6_IFF_IFDISABLED.
1375a283298cSHiroki Sato 			 * See RFC 4862, Section 5.4.5.
1376a283298cSHiroki Sato 			 */
1377a283298cSHiroki Sato 			int duplicated_linklocal = 0;
1378a283298cSHiroki Sato 
1379137f91e8SJohn Baldwin 			IF_ADDR_RLOCK(ifp);
1380a283298cSHiroki Sato 			TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1381a283298cSHiroki Sato 				if (ifa->ifa_addr->sa_family != AF_INET6)
1382a283298cSHiroki Sato 					continue;
1383a283298cSHiroki Sato 				ia = (struct in6_ifaddr *)ifa;
1384a283298cSHiroki Sato 				if ((ia->ia6_flags & IN6_IFF_DUPLICATED) &&
1385e7fa8d0aSHiroki Sato 				    IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) {
1386a283298cSHiroki Sato 					duplicated_linklocal = 1;
1387a283298cSHiroki Sato 					break;
1388a283298cSHiroki Sato 				}
1389a283298cSHiroki Sato 			}
1390137f91e8SJohn Baldwin 			IF_ADDR_RUNLOCK(ifp);
1391a283298cSHiroki Sato 
1392a283298cSHiroki Sato 			if (duplicated_linklocal) {
1393a283298cSHiroki Sato 				ND.flags |= ND6_IFF_IFDISABLED;
1394a283298cSHiroki Sato 				log(LOG_ERR, "Cannot enable an interface"
1395a283298cSHiroki Sato 				    " with a link-local address marked"
1396a283298cSHiroki Sato 				    " duplicate.\n");
1397a283298cSHiroki Sato 			} else {
1398a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED;
1399154d5f73SHiroki Sato 				if (ifp->if_flags & IFF_UP)
1400a283298cSHiroki Sato 					in6_if_up(ifp);
1401a283298cSHiroki Sato 			}
1402a283298cSHiroki Sato 		} else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
1403a283298cSHiroki Sato 			    (ND.flags & ND6_IFF_IFDISABLED)) {
1404a283298cSHiroki Sato 			/* ifdisabled 0->1 transision */
1405a283298cSHiroki Sato 			/* Mark all IPv6 address as tentative. */
1406a283298cSHiroki Sato 
1407a283298cSHiroki Sato 			ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
1408137f91e8SJohn Baldwin 			IF_ADDR_RLOCK(ifp);
1409a283298cSHiroki Sato 			TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1410a283298cSHiroki Sato 				if (ifa->ifa_addr->sa_family != AF_INET6)
1411a283298cSHiroki Sato 					continue;
1412a283298cSHiroki Sato 				ia = (struct in6_ifaddr *)ifa;
1413a283298cSHiroki Sato 				ia->ia6_flags |= IN6_IFF_TENTATIVE;
1414a283298cSHiroki Sato 			}
1415137f91e8SJohn Baldwin 			IF_ADDR_RUNLOCK(ifp);
1416a283298cSHiroki Sato 		}
1417a283298cSHiroki Sato 
1418154d5f73SHiroki Sato 		if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) {
1419154d5f73SHiroki Sato 			if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) {
1420a283298cSHiroki Sato 				/* auto_linklocal 0->1 transision */
1421a283298cSHiroki Sato 
1422a283298cSHiroki Sato 				/* If no link-local address on ifp, configure */
1423a283298cSHiroki Sato 				ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL;
1424a283298cSHiroki Sato 				in6_ifattach(ifp, NULL);
1425154d5f73SHiroki Sato 			} else if (!(ND.flags & ND6_IFF_IFDISABLED) &&
1426154d5f73SHiroki Sato 			    ifp->if_flags & IFF_UP) {
142777bc4985SHiroki Sato 				/*
142877bc4985SHiroki Sato 				 * When the IF already has
1429154d5f73SHiroki Sato 				 * ND6_IFF_AUTO_LINKLOCAL, no link-local
1430154d5f73SHiroki Sato 				 * address is assigned, and IFF_UP, try to
1431154d5f73SHiroki Sato 				 * assign one.
143277bc4985SHiroki Sato 				 */
143377bc4985SHiroki Sato 				int haslinklocal = 0;
143477bc4985SHiroki Sato 
1435137f91e8SJohn Baldwin 				IF_ADDR_RLOCK(ifp);
143677bc4985SHiroki Sato 				TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
143777bc4985SHiroki Sato 					if (ifa->ifa_addr->sa_family != AF_INET6)
143877bc4985SHiroki Sato 						continue;
143977bc4985SHiroki Sato 					ia = (struct in6_ifaddr *)ifa;
144077bc4985SHiroki Sato 					if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) {
144177bc4985SHiroki Sato 						haslinklocal = 1;
144277bc4985SHiroki Sato 						break;
144377bc4985SHiroki Sato 					}
144477bc4985SHiroki Sato 				}
1445137f91e8SJohn Baldwin 				IF_ADDR_RUNLOCK(ifp);
144677bc4985SHiroki Sato 				if (!haslinklocal)
144777bc4985SHiroki Sato 					in6_ifattach(ifp, NULL);
1448a283298cSHiroki Sato 			}
1449a283298cSHiroki Sato 		}
1450154d5f73SHiroki Sato 	}
14512ce62dceSSUZUKI Shinsuke 		ND_IFINFO(ifp)->flags = ND.flags;
1452686cdd19SJun-ichiro itojun Hagino 		break;
14532ce62dceSSUZUKI Shinsuke #undef ND
1454686cdd19SJun-ichiro itojun Hagino 	case SIOCSNDFLUSH_IN6:	/* XXX: the ioctl name is confusing... */
1455743eee66SSUZUKI Shinsuke 		/* sync kernel routing table with the default router list */
1456743eee66SSUZUKI Shinsuke 		defrouter_reset();
1457686cdd19SJun-ichiro itojun Hagino 		defrouter_select();
145882cd038dSYoshinobu Inoue 		break;
145982cd038dSYoshinobu Inoue 	case SIOCSPFXFLUSH_IN6:
146082cd038dSYoshinobu Inoue 	{
146182cd038dSYoshinobu Inoue 		/* flush all the prefix advertised by routers */
146282cd038dSYoshinobu Inoue 		struct nd_prefix *pr, *next;
146382cd038dSYoshinobu Inoue 
14643b0b2840SJohn Baldwin 		LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) {
146533841545SHajimu UMEMOTO 			struct in6_ifaddr *ia, *ia_next;
146633841545SHajimu UMEMOTO 
146733841545SHajimu UMEMOTO 			if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
146833841545SHajimu UMEMOTO 				continue; /* XXX */
146933841545SHajimu UMEMOTO 
147033841545SHajimu UMEMOTO 			/* do we really have to remove addresses as well? */
1471d1da0a06SRobert Watson 			/* XXXRW: in6_ifaddrhead locking. */
147280af0152SRobert Watson 			TAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link,
147380af0152SRobert Watson 			    ia_next) {
147433841545SHajimu UMEMOTO 				if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
147533841545SHajimu UMEMOTO 					continue;
147633841545SHajimu UMEMOTO 
147733841545SHajimu UMEMOTO 				if (ia->ia6_ndpr == pr)
147833841545SHajimu UMEMOTO 					in6_purgeaddr(&ia->ia_ifa);
147933841545SHajimu UMEMOTO 			}
148082cd038dSYoshinobu Inoue 			prelist_remove(pr);
148182cd038dSYoshinobu Inoue 		}
148282cd038dSYoshinobu Inoue 		break;
148382cd038dSYoshinobu Inoue 	}
148482cd038dSYoshinobu Inoue 	case SIOCSRTRFLUSH_IN6:
148582cd038dSYoshinobu Inoue 	{
148682cd038dSYoshinobu Inoue 		/* flush all the default routers */
148782cd038dSYoshinobu Inoue 		struct nd_defrouter *dr, *next;
148882cd038dSYoshinobu Inoue 
1489743eee66SSUZUKI Shinsuke 		defrouter_reset();
14903b0b2840SJohn Baldwin 		TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, next) {
149182cd038dSYoshinobu Inoue 			defrtrlist_del(dr);
149282cd038dSYoshinobu Inoue 		}
1493743eee66SSUZUKI Shinsuke 		defrouter_select();
149482cd038dSYoshinobu Inoue 		break;
149582cd038dSYoshinobu Inoue 	}
149682cd038dSYoshinobu Inoue 	case SIOCGNBRINFO_IN6:
149782cd038dSYoshinobu Inoue 	{
14986e6b3f7cSQing Li 		struct llentry *ln;
149982cd038dSYoshinobu Inoue 		struct in6_addr nb_addr = nbi->addr; /* make local for safety */
150082cd038dSYoshinobu Inoue 
1501a1f7e5f8SHajimu UMEMOTO 		if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0)
1502a1f7e5f8SHajimu UMEMOTO 			return (error);
150382cd038dSYoshinobu Inoue 
150473cb2f38SAndrey V. Elsukov 		IF_AFDATA_RLOCK(ifp);
15056e6b3f7cSQing Li 		ln = nd6_lookup(&nb_addr, 0, ifp);
150673cb2f38SAndrey V. Elsukov 		IF_AFDATA_RUNLOCK(ifp);
15076e6b3f7cSQing Li 
15086e6b3f7cSQing Li 		if (ln == NULL) {
150982cd038dSYoshinobu Inoue 			error = EINVAL;
151082cd038dSYoshinobu Inoue 			break;
151182cd038dSYoshinobu Inoue 		}
151282cd038dSYoshinobu Inoue 		nbi->state = ln->ln_state;
15136e6b3f7cSQing Li 		nbi->asked = ln->la_asked;
151482cd038dSYoshinobu Inoue 		nbi->isrouter = ln->ln_router;
15155a041915SHiroki Sato 		if (ln->la_expire == 0)
15165a041915SHiroki Sato 			nbi->expire = 0;
15175a041915SHiroki Sato 		else
15185a041915SHiroki Sato 			nbi->expire = ln->la_expire +
15195a041915SHiroki Sato 			    (time_second - time_uptime);
15206e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
152182cd038dSYoshinobu Inoue 		break;
152282cd038dSYoshinobu Inoue 	}
1523686cdd19SJun-ichiro itojun Hagino 	case SIOCGDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1524603724d3SBjoern A. Zeeb 		ndif->ifindex = V_nd6_defifindex;
1525686cdd19SJun-ichiro itojun Hagino 		break;
1526686cdd19SJun-ichiro itojun Hagino 	case SIOCSDEFIFACE_IN6:	/* XXX: should be implemented as a sysctl? */
1527686cdd19SJun-ichiro itojun Hagino 		return (nd6_setdefaultiface(ndif->ifindex));
152882cd038dSYoshinobu Inoue 	}
152982cd038dSYoshinobu Inoue 	return (error);
153082cd038dSYoshinobu Inoue }
153182cd038dSYoshinobu Inoue 
153282cd038dSYoshinobu Inoue /*
153382cd038dSYoshinobu Inoue  * Create neighbor cache entry and cache link-layer address,
153482cd038dSYoshinobu Inoue  * on reception of inbound ND6 packets.  (RS/RA/NS/redirect)
15351272577eSXin LI  *
15361272577eSXin LI  * type - ICMP6 type
15371272577eSXin LI  * code - type dependent information
15386e6b3f7cSQing Li  *
15396e6b3f7cSQing Li  * XXXXX
15406e6b3f7cSQing Li  *  The caller of this function already acquired the ndp
15416e6b3f7cSQing Li  *  cache table lock because the cache entry is returned.
154282cd038dSYoshinobu Inoue  */
15436e6b3f7cSQing Li struct llentry *
15441272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr,
15451272577eSXin LI     int lladdrlen, int type, int code)
154682cd038dSYoshinobu Inoue {
15476e6b3f7cSQing Li 	struct llentry *ln = NULL;
154882cd038dSYoshinobu Inoue 	int is_newentry;
154982cd038dSYoshinobu Inoue 	int do_update;
155082cd038dSYoshinobu Inoue 	int olladdr;
155182cd038dSYoshinobu Inoue 	int llchange;
155268352503SBjoern A. Zeeb 	int flags;
155382cd038dSYoshinobu Inoue 	int newstate = 0;
15543d3728e9SQing Li 	uint16_t router = 0;
15556e6b3f7cSQing Li 	struct sockaddr_in6 sin6;
1556fd14c50bSKip Macy 	struct mbuf *chain = NULL;
15573d3728e9SQing Li 	int static_route = 0;
15586e6b3f7cSQing Li 
15596e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
156082cd038dSYoshinobu Inoue 
156139e19560SBjoern A. Zeeb 	KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__));
156239e19560SBjoern A. Zeeb 	KASSERT(from != NULL, ("%s: from == NULL", __func__));
156382cd038dSYoshinobu Inoue 
156482cd038dSYoshinobu Inoue 	/* nothing must be updated for unspecified address */
156582cd038dSYoshinobu Inoue 	if (IN6_IS_ADDR_UNSPECIFIED(from))
156682cd038dSYoshinobu Inoue 		return NULL;
156782cd038dSYoshinobu Inoue 
156882cd038dSYoshinobu Inoue 	/*
156982cd038dSYoshinobu Inoue 	 * Validation about ifp->if_addrlen and lladdrlen must be done in
157082cd038dSYoshinobu Inoue 	 * the caller.
157182cd038dSYoshinobu Inoue 	 *
157282cd038dSYoshinobu Inoue 	 * XXX If the link does not have link-layer adderss, what should
157382cd038dSYoshinobu Inoue 	 * we do? (ifp->if_addrlen == 0)
157482cd038dSYoshinobu Inoue 	 * Spec says nothing in sections for RA, RS and NA.  There's small
157582cd038dSYoshinobu Inoue 	 * description on it in NS section (RFC 2461 7.2.3).
157682cd038dSYoshinobu Inoue 	 */
157768352503SBjoern A. Zeeb 	flags = lladdr ? ND6_EXCLUSIVE : 0;
1578ea0c3776SAndrey V. Elsukov 	IF_AFDATA_RLOCK(ifp);
15796e6b3f7cSQing Li 	ln = nd6_lookup(from, flags, ifp);
1580ea0c3776SAndrey V. Elsukov 	IF_AFDATA_RUNLOCK(ifp);
15816e6b3f7cSQing Li 	if (ln == NULL) {
158268352503SBjoern A. Zeeb 		flags |= ND6_EXCLUSIVE;
1583ea0c3776SAndrey V. Elsukov 		IF_AFDATA_LOCK(ifp);
15846e6b3f7cSQing Li 		ln = nd6_lookup(from, flags | ND6_CREATE, ifp);
15856e6b3f7cSQing Li 		IF_AFDATA_UNLOCK(ifp);
158682cd038dSYoshinobu Inoue 		is_newentry = 1;
158733841545SHajimu UMEMOTO 	} else {
158833841545SHajimu UMEMOTO 		/* do nothing if static ndp is set */
15893d3728e9SQing Li 		if (ln->la_flags & LLE_STATIC) {
15903d3728e9SQing Li 			static_route = 1;
15916e6b3f7cSQing Li 			goto done;
15923d3728e9SQing Li 		}
159382cd038dSYoshinobu Inoue 		is_newentry = 0;
159433841545SHajimu UMEMOTO 	}
15952ce62dceSSUZUKI Shinsuke 	if (ln == NULL)
15966e6b3f7cSQing Li 		return (NULL);
159782cd038dSYoshinobu Inoue 
15986e6b3f7cSQing Li 	olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0;
159982cd038dSYoshinobu Inoue 	if (olladdr && lladdr) {
16006e6b3f7cSQing Li 		llchange = bcmp(lladdr, &ln->ll_addr,
16016e6b3f7cSQing Li 		    ifp->if_addrlen);
160282cd038dSYoshinobu Inoue 	} else
160382cd038dSYoshinobu Inoue 		llchange = 0;
160482cd038dSYoshinobu Inoue 
160582cd038dSYoshinobu Inoue 	/*
160682cd038dSYoshinobu Inoue 	 * newentry olladdr  lladdr  llchange	(*=record)
160782cd038dSYoshinobu Inoue 	 *	0	n	n	--	(1)
160882cd038dSYoshinobu Inoue 	 *	0	y	n	--	(2)
160982cd038dSYoshinobu Inoue 	 *	0	n	y	--	(3) * STALE
161082cd038dSYoshinobu Inoue 	 *	0	y	y	n	(4) *
161182cd038dSYoshinobu Inoue 	 *	0	y	y	y	(5) * STALE
161282cd038dSYoshinobu Inoue 	 *	1	--	n	--	(6)   NOSTATE(= PASSIVE)
161382cd038dSYoshinobu Inoue 	 *	1	--	y	--	(7) * STALE
161482cd038dSYoshinobu Inoue 	 */
161582cd038dSYoshinobu Inoue 
161682cd038dSYoshinobu Inoue 	if (lladdr) {		/* (3-5) and (7) */
161782cd038dSYoshinobu Inoue 		/*
161882cd038dSYoshinobu Inoue 		 * Record source link-layer address
161982cd038dSYoshinobu Inoue 		 * XXX is it dependent to ifp->if_type?
162082cd038dSYoshinobu Inoue 		 */
16216e6b3f7cSQing Li 		bcopy(lladdr, &ln->ll_addr, ifp->if_addrlen);
16226e6b3f7cSQing Li 		ln->la_flags |= LLE_VALID;
162363a97a40SNavdeep Parhar 		EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED);
162482cd038dSYoshinobu Inoue 	}
162582cd038dSYoshinobu Inoue 
162682cd038dSYoshinobu Inoue 	if (!is_newentry) {
16272ce62dceSSUZUKI Shinsuke 		if ((!olladdr && lladdr != NULL) ||	/* (3) */
16282ce62dceSSUZUKI Shinsuke 		    (olladdr && lladdr != NULL && llchange)) {	/* (5) */
162982cd038dSYoshinobu Inoue 			do_update = 1;
163082cd038dSYoshinobu Inoue 			newstate = ND6_LLINFO_STALE;
163182cd038dSYoshinobu Inoue 		} else					/* (1-2,4) */
163282cd038dSYoshinobu Inoue 			do_update = 0;
163382cd038dSYoshinobu Inoue 	} else {
163482cd038dSYoshinobu Inoue 		do_update = 1;
16352ce62dceSSUZUKI Shinsuke 		if (lladdr == NULL)			/* (6) */
163682cd038dSYoshinobu Inoue 			newstate = ND6_LLINFO_NOSTATE;
163782cd038dSYoshinobu Inoue 		else					/* (7) */
163882cd038dSYoshinobu Inoue 			newstate = ND6_LLINFO_STALE;
163982cd038dSYoshinobu Inoue 	}
164082cd038dSYoshinobu Inoue 
164182cd038dSYoshinobu Inoue 	if (do_update) {
164282cd038dSYoshinobu Inoue 		/*
164382cd038dSYoshinobu Inoue 		 * Update the state of the neighbor cache.
164482cd038dSYoshinobu Inoue 		 */
164582cd038dSYoshinobu Inoue 		ln->ln_state = newstate;
164682cd038dSYoshinobu Inoue 
164782cd038dSYoshinobu Inoue 		if (ln->ln_state == ND6_LLINFO_STALE) {
164833841545SHajimu UMEMOTO 			/*
164933841545SHajimu UMEMOTO 			 * XXX: since nd6_output() below will cause
165033841545SHajimu UMEMOTO 			 * state tansition to DELAY and reset the timer,
165133841545SHajimu UMEMOTO 			 * we must set the timer now, although it is actually
165233841545SHajimu UMEMOTO 			 * meaningless.
165333841545SHajimu UMEMOTO 			 */
16546e6b3f7cSQing Li 			nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz);
165533841545SHajimu UMEMOTO 
16566e6b3f7cSQing Li 			if (ln->la_hold) {
1657743eee66SSUZUKI Shinsuke 				struct mbuf *m_hold, *m_hold_next;
16588f34a8b8SSUZUKI Shinsuke 
16598f34a8b8SSUZUKI Shinsuke 				/*
16606e6b3f7cSQing Li 				 * reset the la_hold in advance, to explicitly
16616e6b3f7cSQing Li 				 * prevent a la_hold lookup in nd6_output()
16628f34a8b8SSUZUKI Shinsuke 				 * (wouldn't happen, though...)
16638f34a8b8SSUZUKI Shinsuke 				 */
16646e6b3f7cSQing Li 				for (m_hold = ln->la_hold, ln->la_hold = NULL;
16658d290a59SSUZUKI Shinsuke 				    m_hold; m_hold = m_hold_next) {
1666743eee66SSUZUKI Shinsuke 					m_hold_next = m_hold->m_nextpkt;
16678d290a59SSUZUKI Shinsuke 					m_hold->m_nextpkt = NULL;
1668743eee66SSUZUKI Shinsuke 
1669686cdd19SJun-ichiro itojun Hagino 					/*
1670743eee66SSUZUKI Shinsuke 					 * we assume ifp is not a p2p here, so
1671743eee66SSUZUKI Shinsuke 					 * just set the 2nd argument as the
1672743eee66SSUZUKI Shinsuke 					 * 1st one.
1673686cdd19SJun-ichiro itojun Hagino 					 */
1674fd14c50bSKip Macy 					nd6_output_lle(ifp, ifp, m_hold, L3_ADDR_SIN6(ln), NULL, ln, &chain);
1675743eee66SSUZUKI Shinsuke 				}
1676fd14c50bSKip Macy 				/*
1677fd14c50bSKip Macy 				 * If we have mbufs in the chain we need to do
1678fd14c50bSKip Macy 				 * deferred transmit. Copy the address from the
1679fd14c50bSKip Macy 				 * llentry before dropping the lock down below.
1680fd14c50bSKip Macy 				 */
1681fd14c50bSKip Macy 				if (chain != NULL)
16826e6b3f7cSQing Li 					memcpy(&sin6, L3_ADDR_SIN6(ln), sizeof(sin6));
168382cd038dSYoshinobu Inoue 			}
168482cd038dSYoshinobu Inoue 		} else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) {
168582cd038dSYoshinobu Inoue 			/* probe right away */
16866e6b3f7cSQing Li 			nd6_llinfo_settimer_locked((void *)ln, 0);
168782cd038dSYoshinobu Inoue 		}
168882cd038dSYoshinobu Inoue 	}
168982cd038dSYoshinobu Inoue 
169082cd038dSYoshinobu Inoue 	/*
169182cd038dSYoshinobu Inoue 	 * ICMP6 type dependent behavior.
169282cd038dSYoshinobu Inoue 	 *
169382cd038dSYoshinobu Inoue 	 * NS: clear IsRouter if new entry
169482cd038dSYoshinobu Inoue 	 * RS: clear IsRouter
169582cd038dSYoshinobu Inoue 	 * RA: set IsRouter if there's lladdr
169682cd038dSYoshinobu Inoue 	 * redir: clear IsRouter if new entry
169782cd038dSYoshinobu Inoue 	 *
169882cd038dSYoshinobu Inoue 	 * RA case, (1):
169982cd038dSYoshinobu Inoue 	 * The spec says that we must set IsRouter in the following cases:
170082cd038dSYoshinobu Inoue 	 * - If lladdr exist, set IsRouter.  This means (1-5).
170182cd038dSYoshinobu Inoue 	 * - If it is old entry (!newentry), set IsRouter.  This means (7).
170282cd038dSYoshinobu Inoue 	 * So, based on the spec, in (1-5) and (7) cases we must set IsRouter.
170382cd038dSYoshinobu Inoue 	 * A quetion arises for (1) case.  (1) case has no lladdr in the
170482cd038dSYoshinobu Inoue 	 * neighbor cache, this is similar to (6).
170582cd038dSYoshinobu Inoue 	 * This case is rare but we figured that we MUST NOT set IsRouter.
170682cd038dSYoshinobu Inoue 	 *
170782cd038dSYoshinobu Inoue 	 * newentry olladdr  lladdr  llchange	    NS  RS  RA	redir
170882cd038dSYoshinobu Inoue 	 *							D R
170982cd038dSYoshinobu Inoue 	 *	0	n	n	--	(1)	c   ?     s
171082cd038dSYoshinobu Inoue 	 *	0	y	n	--	(2)	c   s     s
171182cd038dSYoshinobu Inoue 	 *	0	n	y	--	(3)	c   s     s
171282cd038dSYoshinobu Inoue 	 *	0	y	y	n	(4)	c   s     s
171382cd038dSYoshinobu Inoue 	 *	0	y	y	y	(5)	c   s     s
171482cd038dSYoshinobu Inoue 	 *	1	--	n	--	(6) c	c	c s
171582cd038dSYoshinobu Inoue 	 *	1	--	y	--	(7) c	c   s	c s
171682cd038dSYoshinobu Inoue 	 *
171782cd038dSYoshinobu Inoue 	 *					(c=clear s=set)
171882cd038dSYoshinobu Inoue 	 */
171982cd038dSYoshinobu Inoue 	switch (type & 0xff) {
172082cd038dSYoshinobu Inoue 	case ND_NEIGHBOR_SOLICIT:
172182cd038dSYoshinobu Inoue 		/*
172282cd038dSYoshinobu Inoue 		 * New entry must have is_router flag cleared.
172382cd038dSYoshinobu Inoue 		 */
172482cd038dSYoshinobu Inoue 		if (is_newentry)	/* (6-7) */
172582cd038dSYoshinobu Inoue 			ln->ln_router = 0;
172682cd038dSYoshinobu Inoue 		break;
172782cd038dSYoshinobu Inoue 	case ND_REDIRECT:
172882cd038dSYoshinobu Inoue 		/*
172982cd038dSYoshinobu Inoue 		 * If the icmp is a redirect to a better router, always set the
173082cd038dSYoshinobu Inoue 		 * is_router flag.  Otherwise, if the entry is newly created,
173182cd038dSYoshinobu Inoue 		 * clear the flag.  [RFC 2461, sec 8.3]
173282cd038dSYoshinobu Inoue 		 */
173382cd038dSYoshinobu Inoue 		if (code == ND_REDIRECT_ROUTER)
173482cd038dSYoshinobu Inoue 			ln->ln_router = 1;
173582cd038dSYoshinobu Inoue 		else if (is_newentry) /* (6-7) */
173682cd038dSYoshinobu Inoue 			ln->ln_router = 0;
173782cd038dSYoshinobu Inoue 		break;
173882cd038dSYoshinobu Inoue 	case ND_ROUTER_SOLICIT:
173982cd038dSYoshinobu Inoue 		/*
174082cd038dSYoshinobu Inoue 		 * is_router flag must always be cleared.
174182cd038dSYoshinobu Inoue 		 */
174282cd038dSYoshinobu Inoue 		ln->ln_router = 0;
174382cd038dSYoshinobu Inoue 		break;
174482cd038dSYoshinobu Inoue 	case ND_ROUTER_ADVERT:
174582cd038dSYoshinobu Inoue 		/*
174682cd038dSYoshinobu Inoue 		 * Mark an entry with lladdr as a router.
174782cd038dSYoshinobu Inoue 		 */
174807eb2995SHajimu UMEMOTO 		if ((!is_newentry && (olladdr || lladdr)) ||	/* (2-5) */
174907eb2995SHajimu UMEMOTO 		    (is_newentry && lladdr)) {			/* (7) */
175082cd038dSYoshinobu Inoue 			ln->ln_router = 1;
175182cd038dSYoshinobu Inoue 		}
175282cd038dSYoshinobu Inoue 		break;
175382cd038dSYoshinobu Inoue 	}
175482cd038dSYoshinobu Inoue 
175523ee1bfaSKip Macy 	if (ln != NULL) {
17563d3728e9SQing Li 		static_route = (ln->la_flags & LLE_STATIC);
1757c2b3a02bSKip Macy 		router = ln->ln_router;
1758c2b3a02bSKip Macy 
17596e6b3f7cSQing Li 		if (flags & ND6_EXCLUSIVE)
17606e6b3f7cSQing Li 			LLE_WUNLOCK(ln);
17616e6b3f7cSQing Li 		else
17626e6b3f7cSQing Li 			LLE_RUNLOCK(ln);
1763c2b3a02bSKip Macy 		if (static_route)
17646e6b3f7cSQing Li 			ln = NULL;
17656e6b3f7cSQing Li 	}
17666e6b3f7cSQing Li 	if (chain)
17676e6b3f7cSQing Li 		nd6_output_flush(ifp, ifp, chain, &sin6, NULL);
17686e6b3f7cSQing Li 
1769554bf4aaSHajimu UMEMOTO 	/*
1770554bf4aaSHajimu UMEMOTO 	 * When the link-layer address of a router changes, select the
1771554bf4aaSHajimu UMEMOTO 	 * best router again.  In particular, when the neighbor entry is newly
1772554bf4aaSHajimu UMEMOTO 	 * created, it might affect the selection policy.
1773554bf4aaSHajimu UMEMOTO 	 * Question: can we restrict the first condition to the "is_newentry"
1774554bf4aaSHajimu UMEMOTO 	 * case?
1775554bf4aaSHajimu UMEMOTO 	 * XXX: when we hear an RA from a new router with the link-layer
1776554bf4aaSHajimu UMEMOTO 	 * address option, defrouter_select() is called twice, since
1777554bf4aaSHajimu UMEMOTO 	 * defrtrlist_update called the function as well.  However, I believe
1778554bf4aaSHajimu UMEMOTO 	 * we can compromise the overhead, since it only happens the first
1779554bf4aaSHajimu UMEMOTO 	 * time.
1780554bf4aaSHajimu UMEMOTO 	 * XXX: although defrouter_select() should not have a bad effect
1781554bf4aaSHajimu UMEMOTO 	 * for those are not autoconfigured hosts, we explicitly avoid such
1782554bf4aaSHajimu UMEMOTO 	 * cases for safety.
1783554bf4aaSHajimu UMEMOTO 	 */
1784e7fa8d0aSHiroki Sato 	if (do_update && router &&
1785a283298cSHiroki Sato 	    ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) {
17866e6b3f7cSQing Li 		/*
17876e6b3f7cSQing Li 		 * guaranteed recursion
17886e6b3f7cSQing Li 		 */
1789554bf4aaSHajimu UMEMOTO 		defrouter_select();
17906e6b3f7cSQing Li 	}
1791554bf4aaSHajimu UMEMOTO 
17926e6b3f7cSQing Li 	return (ln);
17936e6b3f7cSQing Li done:
1794aba53ef0SKip Macy 	if (ln != NULL) {
17956e6b3f7cSQing Li 		if (flags & ND6_EXCLUSIVE)
17966e6b3f7cSQing Li 			LLE_WUNLOCK(ln);
17976e6b3f7cSQing Li 		else
17986e6b3f7cSQing Li 			LLE_RUNLOCK(ln);
17993d3728e9SQing Li 		if (static_route)
18006e6b3f7cSQing Li 			ln = NULL;
18016e6b3f7cSQing Li 	}
18026e6b3f7cSQing Li 	return (ln);
180382cd038dSYoshinobu Inoue }
180482cd038dSYoshinobu Inoue 
180582cd038dSYoshinobu Inoue static void
18068b615593SMarko Zec nd6_slowtimo(void *arg)
180782cd038dSYoshinobu Inoue {
18088b615593SMarko Zec 	CURVNET_SET((struct vnet *) arg);
180933841545SHajimu UMEMOTO 	struct nd_ifinfo *nd6if;
181031b1bfe1SHajimu UMEMOTO 	struct ifnet *ifp;
181182cd038dSYoshinobu Inoue 
1812603724d3SBjoern A. Zeeb 	callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz,
1813f6dfe47aSMarko Zec 	    nd6_slowtimo, curvnet);
181477dfcdc4SRobert Watson 	IFNET_RLOCK_NOSLEEP();
18153b0b2840SJohn Baldwin 	TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
18160de0dd9bSHiroki Sato 		if (ifp->if_afdata[AF_INET6] == NULL)
18170de0dd9bSHiroki Sato 			continue;
181831b1bfe1SHajimu UMEMOTO 		nd6if = ND_IFINFO(ifp);
181982cd038dSYoshinobu Inoue 		if (nd6if->basereachable && /* already initialized */
182082cd038dSYoshinobu Inoue 		    (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {
182182cd038dSYoshinobu Inoue 			/*
182282cd038dSYoshinobu Inoue 			 * Since reachable time rarely changes by router
182382cd038dSYoshinobu Inoue 			 * advertisements, we SHOULD insure that a new random
182482cd038dSYoshinobu Inoue 			 * value gets recomputed at least once every few hours.
182582cd038dSYoshinobu Inoue 			 * (RFC 2461, 6.3.4)
182682cd038dSYoshinobu Inoue 			 */
1827603724d3SBjoern A. Zeeb 			nd6if->recalctm = V_nd6_recalc_reachtm_interval;
182882cd038dSYoshinobu Inoue 			nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable);
182982cd038dSYoshinobu Inoue 		}
183082cd038dSYoshinobu Inoue 	}
183177dfcdc4SRobert Watson 	IFNET_RUNLOCK_NOSLEEP();
18328b615593SMarko Zec 	CURVNET_RESTORE();
183382cd038dSYoshinobu Inoue }
183482cd038dSYoshinobu Inoue 
183582cd038dSYoshinobu Inoue int
18361272577eSXin LI nd6_output(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m0,
18371272577eSXin LI     struct sockaddr_in6 *dst, struct rtentry *rt0)
183882cd038dSYoshinobu Inoue {
18396e6b3f7cSQing Li 
18406e6b3f7cSQing Li 	return (nd6_output_lle(ifp, origifp, m0, dst, rt0, NULL, NULL));
18416e6b3f7cSQing Li }
18426e6b3f7cSQing Li 
18436e6b3f7cSQing Li 
18446e6b3f7cSQing Li /*
18456e6b3f7cSQing Li  * Note that I'm not enforcing any global serialization
18466e6b3f7cSQing Li  * lle state or asked changes here as the logic is too
18476e6b3f7cSQing Li  * complicated to avoid having to always acquire an exclusive
18486e6b3f7cSQing Li  * lock
18496e6b3f7cSQing Li  * KMM
18506e6b3f7cSQing Li  *
18516e6b3f7cSQing Li  */
18526e6b3f7cSQing Li #define senderr(e) { error = (e); goto bad;}
18536e6b3f7cSQing Li 
18546e6b3f7cSQing Li int
18556e6b3f7cSQing Li nd6_output_lle(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m0,
18566e6b3f7cSQing Li     struct sockaddr_in6 *dst, struct rtentry *rt0, struct llentry *lle,
1857fd14c50bSKip Macy 	struct mbuf **chain)
18586e6b3f7cSQing Li {
185933841545SHajimu UMEMOTO 	struct mbuf *m = m0;
18601db8d1f8SAna Kukec 	struct m_tag *mtag;
18616e6b3f7cSQing Li 	struct llentry *ln = lle;
18621db8d1f8SAna Kukec 	struct ip6_hdr *ip6;
186382cd038dSYoshinobu Inoue 	int error = 0;
18646e6b3f7cSQing Li 	int flags = 0;
18651db8d1f8SAna Kukec 	int ip6len;
186682cd038dSYoshinobu Inoue 
18676e6b3f7cSQing Li #ifdef INVARIANTS
1868aba53ef0SKip Macy 	if (lle != NULL) {
18696e6b3f7cSQing Li 
18706e6b3f7cSQing Li 		LLE_WLOCK_ASSERT(lle);
18716e6b3f7cSQing Li 
1872fd14c50bSKip Macy 		KASSERT(chain != NULL, (" lle locked but no mbuf chain pointer passed"));
18736e6b3f7cSQing Li 	}
18746e6b3f7cSQing Li #endif
187582cd038dSYoshinobu Inoue 	if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr))
187682cd038dSYoshinobu Inoue 		goto sendpkt;
187782cd038dSYoshinobu Inoue 
187833841545SHajimu UMEMOTO 	if (nd6_need_cache(ifp) == 0)
187982cd038dSYoshinobu Inoue 		goto sendpkt;
188082cd038dSYoshinobu Inoue 
188182cd038dSYoshinobu Inoue 	/*
1882cd0fdcf7SHajimu UMEMOTO 	 * next hop determination.  This routine is derived from ether_output.
188382cd038dSYoshinobu Inoue 	 */
188482cd038dSYoshinobu Inoue 
188582cd038dSYoshinobu Inoue 	/*
188682cd038dSYoshinobu Inoue 	 * Address resolution or Neighbor Unreachability Detection
188782cd038dSYoshinobu Inoue 	 * for the next hop.
188882cd038dSYoshinobu Inoue 	 * At this point, the destination of the packet must be a unicast
188982cd038dSYoshinobu Inoue 	 * or an anycast address(i.e. not a multicast).
189082cd038dSYoshinobu Inoue 	 */
189182cd038dSYoshinobu Inoue 
18926e6b3f7cSQing Li 	flags = ((m != NULL) || (lle != NULL)) ? LLE_EXCLUSIVE : 0;
18936e6b3f7cSQing Li 	if (ln == NULL) {
18946e6b3f7cSQing Li 	retry:
1895c445d252SAdrian Chadd 		IF_AFDATA_RLOCK(ifp);
18966e6b3f7cSQing Li 		ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)dst);
1897c445d252SAdrian Chadd 		IF_AFDATA_RUNLOCK(ifp);
18986e6b3f7cSQing Li 		if ((ln == NULL) && nd6_is_addr_neighbor(dst, ifp))  {
1899686cdd19SJun-ichiro itojun Hagino 			/*
1900686cdd19SJun-ichiro itojun Hagino 			 * Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
1901686cdd19SJun-ichiro itojun Hagino 			 * the condition below is not very efficient.  But we believe
1902686cdd19SJun-ichiro itojun Hagino 			 * it is tolerable, because this should be a rare case.
1903686cdd19SJun-ichiro itojun Hagino 			 */
19046e6b3f7cSQing Li 			flags = ND6_CREATE | (m ? ND6_EXCLUSIVE : 0);
1905bbd8aebaSQing Li 			IF_AFDATA_LOCK(ifp);
19066e6b3f7cSQing Li 			ln = nd6_lookup(&dst->sin6_addr, flags, ifp);
1907bbd8aebaSQing Li 			IF_AFDATA_UNLOCK(ifp);
190882cd038dSYoshinobu Inoue 		}
19096e6b3f7cSQing Li 	}
19106e6b3f7cSQing Li 	if (ln == NULL) {
1911686cdd19SJun-ichiro itojun Hagino 		if ((ifp->if_flags & IFF_POINTOPOINT) == 0 &&
191231b1bfe1SHajimu UMEMOTO 		    !(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) {
19131d54aa3bSBjoern A. Zeeb 			char ip6buf[INET6_ADDRSTRLEN];
1914686cdd19SJun-ichiro itojun Hagino 			log(LOG_DEBUG,
1915686cdd19SJun-ichiro itojun Hagino 			    "nd6_output: can't allocate llinfo for %s "
1916bbd8aebaSQing Li 			    "(ln=%p)\n",
1917bbd8aebaSQing Li 			    ip6_sprintf(ip6buf, &dst->sin6_addr), ln);
191882cd038dSYoshinobu Inoue 			senderr(EIO);	/* XXX: good error? */
191982cd038dSYoshinobu Inoue 		}
1920686cdd19SJun-ichiro itojun Hagino 		goto sendpkt;	/* send anyway */
1921686cdd19SJun-ichiro itojun Hagino 	}
1922686cdd19SJun-ichiro itojun Hagino 
1923686cdd19SJun-ichiro itojun Hagino 	/* We don't have to do link-layer address resolution on a p2p link. */
1924686cdd19SJun-ichiro itojun Hagino 	if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
192533841545SHajimu UMEMOTO 	    ln->ln_state < ND6_LLINFO_REACHABLE) {
19266e6b3f7cSQing Li 		if ((flags & LLE_EXCLUSIVE) == 0) {
19276e6b3f7cSQing Li 			flags |= LLE_EXCLUSIVE;
19286e6b3f7cSQing Li 			goto retry;
19296e6b3f7cSQing Li 		}
1930686cdd19SJun-ichiro itojun Hagino 		ln->ln_state = ND6_LLINFO_STALE;
19316e6b3f7cSQing Li 		nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz);
193233841545SHajimu UMEMOTO 	}
193382cd038dSYoshinobu Inoue 
193482cd038dSYoshinobu Inoue 	/*
193582cd038dSYoshinobu Inoue 	 * The first time we send a packet to a neighbor whose entry is
193682cd038dSYoshinobu Inoue 	 * STALE, we have to change the state to DELAY and a sets a timer to
193782cd038dSYoshinobu Inoue 	 * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do
193882cd038dSYoshinobu Inoue 	 * neighbor unreachability detection on expiration.
193982cd038dSYoshinobu Inoue 	 * (RFC 2461 7.3.3)
194082cd038dSYoshinobu Inoue 	 */
194182cd038dSYoshinobu Inoue 	if (ln->ln_state == ND6_LLINFO_STALE) {
19426e6b3f7cSQing Li 		if ((flags & LLE_EXCLUSIVE) == 0) {
19436e6b3f7cSQing Li 			flags |= LLE_EXCLUSIVE;
19446e6b3f7cSQing Li 			LLE_RUNLOCK(ln);
19456e6b3f7cSQing Li 			goto retry;
19466e6b3f7cSQing Li 		}
19476e6b3f7cSQing Li 		ln->la_asked = 0;
194882cd038dSYoshinobu Inoue 		ln->ln_state = ND6_LLINFO_DELAY;
19496e6b3f7cSQing Li 		nd6_llinfo_settimer_locked(ln, (long)V_nd6_delay * hz);
195082cd038dSYoshinobu Inoue 	}
195182cd038dSYoshinobu Inoue 
195282cd038dSYoshinobu Inoue 	/*
195382cd038dSYoshinobu Inoue 	 * If the neighbor cache entry has a state other than INCOMPLETE
195488ff5695SSUZUKI Shinsuke 	 * (i.e. its link-layer address is already resolved), just
195582cd038dSYoshinobu Inoue 	 * send the packet.
195682cd038dSYoshinobu Inoue 	 */
195782cd038dSYoshinobu Inoue 	if (ln->ln_state > ND6_LLINFO_INCOMPLETE)
195882cd038dSYoshinobu Inoue 		goto sendpkt;
195982cd038dSYoshinobu Inoue 
196082cd038dSYoshinobu Inoue 	/*
196182cd038dSYoshinobu Inoue 	 * There is a neighbor cache entry, but no ethernet address
1962743eee66SSUZUKI Shinsuke 	 * response yet.  Append this latest packet to the end of the
1963743eee66SSUZUKI Shinsuke 	 * packet queue in the mbuf, unless the number of the packet
1964743eee66SSUZUKI Shinsuke 	 * does not exceed nd6_maxqueuelen.  When it exceeds nd6_maxqueuelen,
1965743eee66SSUZUKI Shinsuke 	 * the oldest packet in the queue will be removed.
196682cd038dSYoshinobu Inoue 	 */
196733841545SHajimu UMEMOTO 	if (ln->ln_state == ND6_LLINFO_NOSTATE)
196882cd038dSYoshinobu Inoue 		ln->ln_state = ND6_LLINFO_INCOMPLETE;
19696e6b3f7cSQing Li 
19706e6b3f7cSQing Li 	if ((flags & LLE_EXCLUSIVE) == 0) {
19716e6b3f7cSQing Li 		flags |= LLE_EXCLUSIVE;
19726e6b3f7cSQing Li 		LLE_RUNLOCK(ln);
19736e6b3f7cSQing Li 		goto retry;
19746e6b3f7cSQing Li 	}
1975e6950476SBjoern A. Zeeb 
1976e6950476SBjoern A. Zeeb 	LLE_WLOCK_ASSERT(ln);
1977e6950476SBjoern A. Zeeb 
19786e6b3f7cSQing Li 	if (ln->la_hold) {
1979743eee66SSUZUKI Shinsuke 		struct mbuf *m_hold;
1980743eee66SSUZUKI Shinsuke 		int i;
1981743eee66SSUZUKI Shinsuke 
1982743eee66SSUZUKI Shinsuke 		i = 0;
19836e6b3f7cSQing Li 		for (m_hold = ln->la_hold; m_hold; m_hold = m_hold->m_nextpkt) {
1984743eee66SSUZUKI Shinsuke 			i++;
1985743eee66SSUZUKI Shinsuke 			if (m_hold->m_nextpkt == NULL) {
1986743eee66SSUZUKI Shinsuke 				m_hold->m_nextpkt = m;
1987743eee66SSUZUKI Shinsuke 				break;
198882cd038dSYoshinobu Inoue 			}
198982cd038dSYoshinobu Inoue 		}
1990603724d3SBjoern A. Zeeb 		while (i >= V_nd6_maxqueuelen) {
19916e6b3f7cSQing Li 			m_hold = ln->la_hold;
19926e6b3f7cSQing Li 			ln->la_hold = ln->la_hold->m_nextpkt;
199331d4137bSSUZUKI Shinsuke 			m_freem(m_hold);
1994743eee66SSUZUKI Shinsuke 			i--;
1995743eee66SSUZUKI Shinsuke 		}
1996743eee66SSUZUKI Shinsuke 	} else {
19976e6b3f7cSQing Li 		ln->la_hold = m;
19986e6b3f7cSQing Li 	}
1999743eee66SSUZUKI Shinsuke 
2000743eee66SSUZUKI Shinsuke 	/*
2001743eee66SSUZUKI Shinsuke 	 * If there has been no NS for the neighbor after entering the
2002743eee66SSUZUKI Shinsuke 	 * INCOMPLETE state, send the first solicitation.
2003743eee66SSUZUKI Shinsuke 	 */
20046e6b3f7cSQing Li 	if (!ND6_LLINFO_PERMANENT(ln) && ln->la_asked == 0) {
20056e6b3f7cSQing Li 		ln->la_asked++;
20066e6b3f7cSQing Li 
2007e6950476SBjoern A. Zeeb 		nd6_llinfo_settimer_locked(ln,
2008743eee66SSUZUKI Shinsuke 		    (long)ND_IFINFO(ifp)->retrans * hz / 1000);
2009e6950476SBjoern A. Zeeb 		LLE_WUNLOCK(ln);
2010743eee66SSUZUKI Shinsuke 		nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0);
2011e6950476SBjoern A. Zeeb 		if (lle != NULL && ln == lle)
2012e6950476SBjoern A. Zeeb 			LLE_WLOCK(lle);
2013e6950476SBjoern A. Zeeb 
2014e6950476SBjoern A. Zeeb 	} else if (lle == NULL || ln != lle) {
2015e6950476SBjoern A. Zeeb 		/*
2016e6950476SBjoern A. Zeeb 		 * We did the lookup (no lle arg) so we
2017e6950476SBjoern A. Zeeb 		 * need to do the unlock here.
2018e6950476SBjoern A. Zeeb 		 */
2019e6950476SBjoern A. Zeeb 		LLE_WUNLOCK(ln);
2020743eee66SSUZUKI Shinsuke 	}
2021e6950476SBjoern A. Zeeb 
202282cd038dSYoshinobu Inoue 	return (0);
202382cd038dSYoshinobu Inoue 
202482cd038dSYoshinobu Inoue   sendpkt:
20255b27b045SSUZUKI Shinsuke 	/* discard the packet if IPv6 operation is disabled on the interface */
20265b27b045SSUZUKI Shinsuke 	if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) {
20275b27b045SSUZUKI Shinsuke 		error = ENETDOWN; /* better error? */
20285b27b045SSUZUKI Shinsuke 		goto bad;
20295b27b045SSUZUKI Shinsuke 	}
20306e6b3f7cSQing Li 	/*
20316e6b3f7cSQing Li 	 * ln is valid and the caller did not pass in
20326e6b3f7cSQing Li 	 * an llentry
20336e6b3f7cSQing Li 	 */
203423ee1bfaSKip Macy 	if ((ln != NULL) && (lle == NULL)) {
20356e6b3f7cSQing Li 		if (flags & LLE_EXCLUSIVE)
20366e6b3f7cSQing Li 			LLE_WUNLOCK(ln);
20376e6b3f7cSQing Li 		else
20386e6b3f7cSQing Li 			LLE_RUNLOCK(ln);
20396e6b3f7cSQing Li 	}
20405b27b045SSUZUKI Shinsuke 
20414b32dfdcSRobert Watson #ifdef MAC
2042b9b0dac3SRobert Watson 	mac_netinet6_nd6_send(ifp, m);
20434b32dfdcSRobert Watson #endif
20441db8d1f8SAna Kukec 
20451db8d1f8SAna Kukec 	/*
20461db8d1f8SAna Kukec 	 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
20471db8d1f8SAna Kukec 	 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
20481db8d1f8SAna Kukec 	 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
20491db8d1f8SAna Kukec 	 * to be diverted to user space.  When re-injected into the kernel,
20501db8d1f8SAna Kukec 	 * send_output() will directly dispatch them to the outgoing interface.
20511db8d1f8SAna Kukec 	 */
20521db8d1f8SAna Kukec 	if (send_sendso_input_hook != NULL) {
20531db8d1f8SAna Kukec 		mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
20541db8d1f8SAna Kukec 		if (mtag != NULL) {
20551db8d1f8SAna Kukec 			ip6 = mtod(m, struct ip6_hdr *);
20561db8d1f8SAna Kukec 			ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
20571db8d1f8SAna Kukec 			/* Use the SEND socket */
20581db8d1f8SAna Kukec 			error = send_sendso_input_hook(m, ifp, SND_OUT,
20591db8d1f8SAna Kukec 			    ip6len);
20601db8d1f8SAna Kukec 			/* -1 == no app on SEND socket */
20611db8d1f8SAna Kukec 			if (error == 0 || error != -1)
20621db8d1f8SAna Kukec 			    return (error);
20631db8d1f8SAna Kukec 		}
20641db8d1f8SAna Kukec 	}
20651db8d1f8SAna Kukec 
2066fd14c50bSKip Macy 	/*
2067fd14c50bSKip Macy 	 * We were passed in a pointer to an lle with the lock held
2068fd14c50bSKip Macy 	 * this means that we can't call if_output as we will
2069fd14c50bSKip Macy 	 * recurse on the lle lock - so what we do is we create
2070fd14c50bSKip Macy 	 * a list of mbufs to send and transmit them in the caller
2071fd14c50bSKip Macy 	 * after the lock is dropped
2072fd14c50bSKip Macy 	 */
20736e6b3f7cSQing Li 	if (lle != NULL) {
2074fd14c50bSKip Macy 		if (*chain == NULL)
2075fd14c50bSKip Macy 			*chain = m;
207615209fb6SKip Macy 		else {
2077d7ae3714SBjoern A. Zeeb 			struct mbuf *mb;
2078fd14c50bSKip Macy 
2079fd14c50bSKip Macy 			/*
2080fd14c50bSKip Macy 			 * append mbuf to end of deferred chain
2081fd14c50bSKip Macy 			 */
2082d7ae3714SBjoern A. Zeeb 			mb = *chain;
2083d7ae3714SBjoern A. Zeeb 			while (mb->m_nextpkt != NULL)
2084d7ae3714SBjoern A. Zeeb 				mb = mb->m_nextpkt;
2085d7ae3714SBjoern A. Zeeb 			mb->m_nextpkt = m;
208615209fb6SKip Macy 		}
20876e6b3f7cSQing Li 		return (error);
20886e6b3f7cSQing Li 	}
208986bd0491SAndre Oppermann 	m_clrprotoflags(m);	/* Avoid confusing lower layers. */
209057f60867SMark Johnston 	IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
209157f60867SMark Johnston 	    mtod(m, struct ip6_hdr *));
209233841545SHajimu UMEMOTO 	if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
2093686cdd19SJun-ichiro itojun Hagino 		return ((*ifp->if_output)(origifp, m, (struct sockaddr *)dst,
2094bbd8aebaSQing Li 		    NULL));
2095686cdd19SJun-ichiro itojun Hagino 	}
2096bbd8aebaSQing Li 	error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst, NULL);
20976e6b3f7cSQing Li 	return (error);
209882cd038dSYoshinobu Inoue 
209982cd038dSYoshinobu Inoue   bad:
21006e6b3f7cSQing Li 	/*
21016e6b3f7cSQing Li 	 * ln is valid and the caller did not pass in
21026e6b3f7cSQing Li 	 * an llentry
21036e6b3f7cSQing Li 	 */
210423ee1bfaSKip Macy 	if ((ln != NULL) && (lle == NULL)) {
21056e6b3f7cSQing Li 		if (flags & LLE_EXCLUSIVE)
21066e6b3f7cSQing Li 			LLE_WUNLOCK(ln);
21076e6b3f7cSQing Li 		else
21086e6b3f7cSQing Li 			LLE_RUNLOCK(ln);
21096e6b3f7cSQing Li 	}
211082cd038dSYoshinobu Inoue 	if (m)
211182cd038dSYoshinobu Inoue 		m_freem(m);
211282cd038dSYoshinobu Inoue 	return (error);
211382cd038dSYoshinobu Inoue }
211482cd038dSYoshinobu Inoue #undef senderr
211582cd038dSYoshinobu Inoue 
21166e6b3f7cSQing Li 
21176e6b3f7cSQing Li int
21186e6b3f7cSQing Li nd6_output_flush(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *chain,
2119279aa3d4SKip Macy     struct sockaddr_in6 *dst, struct route *ro)
21206e6b3f7cSQing Li {
21216e6b3f7cSQing Li 	struct mbuf *m, *m_head;
21226e6b3f7cSQing Li 	struct ifnet *outifp;
21236e6b3f7cSQing Li 	int error = 0;
21246e6b3f7cSQing Li 
21256e6b3f7cSQing Li 	m_head = chain;
21266e6b3f7cSQing Li 	if ((ifp->if_flags & IFF_LOOPBACK) != 0)
21276e6b3f7cSQing Li 		outifp = origifp;
21286e6b3f7cSQing Li 	else
21296e6b3f7cSQing Li 		outifp = ifp;
21306e6b3f7cSQing Li 
21316e6b3f7cSQing Li 	while (m_head) {
21326e6b3f7cSQing Li 		m = m_head;
21336e6b3f7cSQing Li 		m_head = m_head->m_nextpkt;
2134279aa3d4SKip Macy 		error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst, ro);
21356e6b3f7cSQing Li 	}
21366e6b3f7cSQing Li 
21376e6b3f7cSQing Li 	/*
21386e6b3f7cSQing Li 	 * XXX
21396e6b3f7cSQing Li 	 * note that intermediate errors are blindly ignored - but this is
21406e6b3f7cSQing Li 	 * the same convention as used with nd6_output when called by
21416e6b3f7cSQing Li 	 * nd6_cache_lladdr
21426e6b3f7cSQing Li 	 */
21436e6b3f7cSQing Li 	return (error);
21446e6b3f7cSQing Li }
21456e6b3f7cSQing Li 
21466e6b3f7cSQing Li 
214782cd038dSYoshinobu Inoue int
21481272577eSXin LI nd6_need_cache(struct ifnet *ifp)
214933841545SHajimu UMEMOTO {
215033841545SHajimu UMEMOTO 	/*
215133841545SHajimu UMEMOTO 	 * XXX: we currently do not make neighbor cache on any interface
215233841545SHajimu UMEMOTO 	 * other than ARCnet, Ethernet, FDDI and GIF.
215333841545SHajimu UMEMOTO 	 *
215433841545SHajimu UMEMOTO 	 * RFC2893 says:
215533841545SHajimu UMEMOTO 	 * - unidirectional tunnels needs no ND
215633841545SHajimu UMEMOTO 	 */
215733841545SHajimu UMEMOTO 	switch (ifp->if_type) {
215833841545SHajimu UMEMOTO 	case IFT_ARCNET:
215933841545SHajimu UMEMOTO 	case IFT_ETHER:
216033841545SHajimu UMEMOTO 	case IFT_FDDI:
216133841545SHajimu UMEMOTO 	case IFT_IEEE1394:
216205b6760dSMunechika SUMIKAWA #ifdef IFT_L2VLAN
216305b6760dSMunechika SUMIKAWA 	case IFT_L2VLAN:
216405b6760dSMunechika SUMIKAWA #endif
216533841545SHajimu UMEMOTO #ifdef IFT_IEEE80211
216633841545SHajimu UMEMOTO 	case IFT_IEEE80211:
216733841545SHajimu UMEMOTO #endif
2168e4cd31ddSJeff Roberson 	case IFT_INFINIBAND:
216933841545SHajimu UMEMOTO 	case IFT_GIF:		/* XXX need more cases? */
21709c8aab3eSSUZUKI Shinsuke 	case IFT_PPP:
21719c8aab3eSSUZUKI Shinsuke 	case IFT_TUNNEL:
217259280079SAndrew Thompson 	case IFT_BRIDGE:
2173c57086ceSHajimu UMEMOTO 	case IFT_PROPVIRTUAL:
217433841545SHajimu UMEMOTO 		return (1);
217533841545SHajimu UMEMOTO 	default:
217633841545SHajimu UMEMOTO 		return (0);
217733841545SHajimu UMEMOTO 	}
217833841545SHajimu UMEMOTO }
217933841545SHajimu UMEMOTO 
21806e6b3f7cSQing Li /*
2181*f6b84910SAlexander V. Chernikov  * Add pernament ND6 link-layer record for given
2182*f6b84910SAlexander V. Chernikov  * interface address.
2183*f6b84910SAlexander V. Chernikov  *
2184*f6b84910SAlexander V. Chernikov  * Very similar to IPv4 arp_ifinit(), but:
2185*f6b84910SAlexander V. Chernikov  * 1) IPv6 DAD is performed in different place
2186*f6b84910SAlexander V. Chernikov  * 2) It is called by IPv6 protocol stack in contrast to
2187*f6b84910SAlexander V. Chernikov  * arp_ifinit() which is typically called in SIOCSIFADDR
2188*f6b84910SAlexander V. Chernikov  * driver ioctl handler.
2189*f6b84910SAlexander V. Chernikov  *
2190*f6b84910SAlexander V. Chernikov  */
2191*f6b84910SAlexander V. Chernikov int
2192*f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia)
2193*f6b84910SAlexander V. Chernikov {
2194*f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
2195*f6b84910SAlexander V. Chernikov 	struct llentry *ln;
2196*f6b84910SAlexander V. Chernikov 
2197*f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2198*f6b84910SAlexander V. Chernikov 	IF_AFDATA_LOCK(ifp);
2199*f6b84910SAlexander V. Chernikov 	ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
2200*f6b84910SAlexander V. Chernikov 	ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
2201*f6b84910SAlexander V. Chernikov 	    LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
2202*f6b84910SAlexander V. Chernikov 	IF_AFDATA_UNLOCK(ifp);
2203*f6b84910SAlexander V. Chernikov 	if (ln != NULL) {
2204*f6b84910SAlexander V. Chernikov 		ln->la_expire = 0;  /* for IPv6 this means permanent */
2205*f6b84910SAlexander V. Chernikov 		ln->ln_state = ND6_LLINFO_REACHABLE;
2206*f6b84910SAlexander V. Chernikov 		LLE_WUNLOCK(ln);
2207*f6b84910SAlexander V. Chernikov 		in6_newaddrmsg(ia, RTM_ADD);
2208*f6b84910SAlexander V. Chernikov 		return (0);
2209*f6b84910SAlexander V. Chernikov 	}
2210*f6b84910SAlexander V. Chernikov 
2211*f6b84910SAlexander V. Chernikov 	return (ENOBUFS);
2212*f6b84910SAlexander V. Chernikov }
2213*f6b84910SAlexander V. Chernikov 
2214*f6b84910SAlexander V. Chernikov /*
2215*f6b84910SAlexander V. Chernikov  * Removes ALL lle records for interface address prefix.
2216*f6b84910SAlexander V. Chernikov  * XXXME: That's probably not we really want to do, we need
2217*f6b84910SAlexander V. Chernikov  * to remove address record only and keep other records
2218*f6b84910SAlexander V. Chernikov  * until we determine if given prefix is really going
2219*f6b84910SAlexander V. Chernikov  * to be removed.
2220*f6b84910SAlexander V. Chernikov  */
2221*f6b84910SAlexander V. Chernikov void
2222*f6b84910SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia)
2223*f6b84910SAlexander V. Chernikov {
2224*f6b84910SAlexander V. Chernikov 	struct sockaddr_in6 mask, addr;
2225*f6b84910SAlexander V. Chernikov 	struct ifnet *ifp;
2226*f6b84910SAlexander V. Chernikov 
2227*f6b84910SAlexander V. Chernikov 	in6_newaddrmsg(ia, RTM_DELETE);
2228*f6b84910SAlexander V. Chernikov 
2229*f6b84910SAlexander V. Chernikov 	ifp = ia->ia_ifa.ifa_ifp;
2230*f6b84910SAlexander V. Chernikov 	memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
2231*f6b84910SAlexander V. Chernikov 	memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
2232*f6b84910SAlexander V. Chernikov 	lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
2233*f6b84910SAlexander V. Chernikov 	            (struct sockaddr *)&mask, LLE_STATIC);
2234*f6b84910SAlexander V. Chernikov }
2235*f6b84910SAlexander V. Chernikov 
2236*f6b84910SAlexander V. Chernikov /*
22376e6b3f7cSQing Li  * the callers of this function need to be re-worked to drop
22386e6b3f7cSQing Li  * the lle lock, drop here for now
22396e6b3f7cSQing Li  */
224033841545SHajimu UMEMOTO int
2241bbd8aebaSQing Li nd6_storelladdr(struct ifnet *ifp, struct mbuf *m,
224247e8d432SGleb Smirnoff     const struct sockaddr *dst, u_char *desten, struct llentry **lle)
224382cd038dSYoshinobu Inoue {
22446e6b3f7cSQing Li 	struct llentry *ln;
224582cd038dSYoshinobu Inoue 
22466e6b3f7cSQing Li 	*lle = NULL;
22476e6b3f7cSQing Li 	IF_AFDATA_UNLOCK_ASSERT(ifp);
2248f31b83e1SNavdeep Parhar 	if (m != NULL && m->m_flags & M_MCAST) {
2249401df2f2SGleb Smirnoff 		int i;
2250401df2f2SGleb Smirnoff 
225182cd038dSYoshinobu Inoue 		switch (ifp->if_type) {
225282cd038dSYoshinobu Inoue 		case IFT_ETHER:
225382cd038dSYoshinobu Inoue 		case IFT_FDDI:
225405b6760dSMunechika SUMIKAWA #ifdef IFT_L2VLAN
225505b6760dSMunechika SUMIKAWA 		case IFT_L2VLAN:
225605b6760dSMunechika SUMIKAWA #endif
225733841545SHajimu UMEMOTO #ifdef IFT_IEEE80211
225833841545SHajimu UMEMOTO 		case IFT_IEEE80211:
225933841545SHajimu UMEMOTO #endif
226059280079SAndrew Thompson 		case IFT_BRIDGE:
22612049fdeeSMatthew N. Dodd 		case IFT_ISO88025:
226282cd038dSYoshinobu Inoue 			ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr,
226382cd038dSYoshinobu Inoue 						 desten);
2264354c3d34SLuigi Rizzo 			return (0);
226533841545SHajimu UMEMOTO 		case IFT_IEEE1394:
226688ff5695SSUZUKI Shinsuke 			/*
226788ff5695SSUZUKI Shinsuke 			 * netbsd can use if_broadcastaddr, but we don't do so
226888ff5695SSUZUKI Shinsuke 			 * to reduce # of ifdef.
226988ff5695SSUZUKI Shinsuke 			 */
227033841545SHajimu UMEMOTO 			for (i = 0; i < ifp->if_addrlen; i++)
227133841545SHajimu UMEMOTO 				desten[i] = ~0;
2272354c3d34SLuigi Rizzo 			return (0);
227382cd038dSYoshinobu Inoue 		case IFT_ARCNET:
227482cd038dSYoshinobu Inoue 			*desten = 0;
2275354c3d34SLuigi Rizzo 			return (0);
227682cd038dSYoshinobu Inoue 		default:
2277fef5fd23SBosko Milekic 			m_freem(m);
2278354c3d34SLuigi Rizzo 			return (EAFNOSUPPORT);
227982cd038dSYoshinobu Inoue 		}
228082cd038dSYoshinobu Inoue 	}
228182cd038dSYoshinobu Inoue 
22826e6b3f7cSQing Li 
22836e6b3f7cSQing Li 	/*
22846e6b3f7cSQing Li 	 * the entry should have been created in nd6_store_lladdr
22856e6b3f7cSQing Li 	 */
228673cb2f38SAndrey V. Elsukov 	IF_AFDATA_RLOCK(ifp);
22876e6b3f7cSQing Li 	ln = lla_lookup(LLTABLE6(ifp), 0, dst);
228873cb2f38SAndrey V. Elsukov 	IF_AFDATA_RUNLOCK(ifp);
22896e6b3f7cSQing Li 	if ((ln == NULL) || !(ln->la_flags & LLE_VALID)) {
229015209fb6SKip Macy 		if (ln != NULL)
22916e6b3f7cSQing Li 			LLE_RUNLOCK(ln);
2292530f95fcSGleb Smirnoff 		/* this could happen, if we could not allocate memory */
2293530f95fcSGleb Smirnoff 		m_freem(m);
22946e6b3f7cSQing Li 		return (1);
2295530f95fcSGleb Smirnoff 	}
2296530f95fcSGleb Smirnoff 
22976e6b3f7cSQing Li 	bcopy(&ln->ll_addr, desten, ifp->if_addrlen);
22986e6b3f7cSQing Li 	*lle = ln;
22996e6b3f7cSQing Li 	LLE_RUNLOCK(ln);
23006e6b3f7cSQing Li 	/*
23016e6b3f7cSQing Li 	 * A *small* use after free race exists here
23026e6b3f7cSQing Li 	 */
2303cd46a114SLuigi Rizzo 	return (0);
230482cd038dSYoshinobu Inoue }
230533841545SHajimu UMEMOTO 
230631d4137bSSUZUKI Shinsuke static void
23076e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln)
230831d4137bSSUZUKI Shinsuke {
230931d4137bSSUZUKI Shinsuke 	struct mbuf *m_hold, *m_hold_next;
231031d4137bSSUZUKI Shinsuke 
23116e6b3f7cSQing Li 	for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) {
231231d4137bSSUZUKI Shinsuke 		m_hold_next = m_hold->m_nextpkt;
231331d4137bSSUZUKI Shinsuke 		m_freem(m_hold);
231431d4137bSSUZUKI Shinsuke 	}
231531d4137bSSUZUKI Shinsuke 
23166e6b3f7cSQing Li 	ln->la_hold = NULL;
231731d4137bSSUZUKI Shinsuke 	return;
231831d4137bSSUZUKI Shinsuke }
231931d4137bSSUZUKI Shinsuke 
232033841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS);
232133841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS);
232233841545SHajimu UMEMOTO #ifdef SYSCTL_DECL
232333841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6);
232433841545SHajimu UMEMOTO #endif
232533841545SHajimu UMEMOTO SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
232633841545SHajimu UMEMOTO 	CTLFLAG_RD, nd6_sysctl_drlist, "");
232733841545SHajimu UMEMOTO SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
232833841545SHajimu UMEMOTO 	CTLFLAG_RD, nd6_sysctl_prlist, "");
2329eddfbb76SRobert Watson SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
2330eddfbb76SRobert Watson 	CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
233133841545SHajimu UMEMOTO 
233233841545SHajimu UMEMOTO static int
233333841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS)
233433841545SHajimu UMEMOTO {
23357195094cSMarius Strobl 	struct in6_defrouter d;
233633841545SHajimu UMEMOTO 	struct nd_defrouter *dr;
23377195094cSMarius Strobl 	int error;
233833841545SHajimu UMEMOTO 
233933841545SHajimu UMEMOTO 	if (req->newptr)
23407195094cSMarius Strobl 		return (EPERM);
234133841545SHajimu UMEMOTO 
23427195094cSMarius Strobl 	bzero(&d, sizeof(d));
23437195094cSMarius Strobl 	d.rtaddr.sin6_family = AF_INET6;
23447195094cSMarius Strobl 	d.rtaddr.sin6_len = sizeof(d.rtaddr);
23457195094cSMarius Strobl 
23467195094cSMarius Strobl 	/*
23477195094cSMarius Strobl 	 * XXX locking
23487195094cSMarius Strobl 	 */
23493b0b2840SJohn Baldwin 	TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) {
23507195094cSMarius Strobl 		d.rtaddr.sin6_addr = dr->rtaddr;
23517195094cSMarius Strobl 		error = sa6_recoverscope(&d.rtaddr);
2352edbb8b46SPeter Wemm 		if (error != 0)
2353b2630c29SGeorge V. Neville-Neil 			return (error);
23547195094cSMarius Strobl 		d.flags = dr->flags;
23557195094cSMarius Strobl 		d.rtlifetime = dr->rtlifetime;
2356ffa0165aSHiroki Sato 		d.expire = dr->expire + (time_second - time_uptime);
23577195094cSMarius Strobl 		d.if_index = dr->ifp->if_index;
23587195094cSMarius Strobl 		error = SYSCTL_OUT(req, &d, sizeof(d));
23597195094cSMarius Strobl 		if (error != 0)
236007eb2995SHajimu UMEMOTO 			return (error);
236133841545SHajimu UMEMOTO 	}
23627195094cSMarius Strobl 	return (0);
23637195094cSMarius Strobl }
236433841545SHajimu UMEMOTO 
236533841545SHajimu UMEMOTO static int
236633841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS)
236733841545SHajimu UMEMOTO {
23687195094cSMarius Strobl 	struct in6_prefix p;
23697195094cSMarius Strobl 	struct sockaddr_in6 s6;
237033841545SHajimu UMEMOTO 	struct nd_prefix *pr;
23717195094cSMarius Strobl 	struct nd_pfxrouter *pfr;
23727195094cSMarius Strobl 	time_t maxexpire;
23737195094cSMarius Strobl 	int error;
23741d54aa3bSBjoern A. Zeeb 	char ip6buf[INET6_ADDRSTRLEN];
237533841545SHajimu UMEMOTO 
237633841545SHajimu UMEMOTO 	if (req->newptr)
23777195094cSMarius Strobl 		return (EPERM);
237833841545SHajimu UMEMOTO 
23797195094cSMarius Strobl 	bzero(&p, sizeof(p));
23807195094cSMarius Strobl 	p.origin = PR_ORIG_RA;
23817195094cSMarius Strobl 	bzero(&s6, sizeof(s6));
23827195094cSMarius Strobl 	s6.sin6_family = AF_INET6;
23837195094cSMarius Strobl 	s6.sin6_len = sizeof(s6);
23847195094cSMarius Strobl 
23857195094cSMarius Strobl 	/*
23867195094cSMarius Strobl 	 * XXX locking
23877195094cSMarius Strobl 	 */
23883b0b2840SJohn Baldwin 	LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) {
23897195094cSMarius Strobl 		p.prefix = pr->ndpr_prefix;
23907195094cSMarius Strobl 		if (sa6_recoverscope(&p.prefix)) {
23917195094cSMarius Strobl 			log(LOG_ERR, "scope error in prefix list (%s)\n",
23927195094cSMarius Strobl 			    ip6_sprintf(ip6buf, &p.prefix.sin6_addr));
2393a1f7e5f8SHajimu UMEMOTO 			/* XXX: press on... */
2394a1f7e5f8SHajimu UMEMOTO 		}
23957195094cSMarius Strobl 		p.raflags = pr->ndpr_raf;
23967195094cSMarius Strobl 		p.prefixlen = pr->ndpr_plen;
23977195094cSMarius Strobl 		p.vltime = pr->ndpr_vltime;
23987195094cSMarius Strobl 		p.pltime = pr->ndpr_pltime;
23997195094cSMarius Strobl 		p.if_index = pr->ndpr_ifp->if_index;
2400743eee66SSUZUKI Shinsuke 		if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME)
24017195094cSMarius Strobl 			p.expire = 0;
2402743eee66SSUZUKI Shinsuke 		else {
2403743eee66SSUZUKI Shinsuke 			/* XXX: we assume time_t is signed. */
2404743eee66SSUZUKI Shinsuke 			maxexpire = (-1) &
24057195094cSMarius Strobl 			    ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
24067195094cSMarius Strobl 			if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate)
24077195094cSMarius Strobl 				p.expire = pr->ndpr_lastupdate +
2408ffa0165aSHiroki Sato 				    pr->ndpr_vltime +
2409ffa0165aSHiroki Sato 				    (time_second - time_uptime);
24107195094cSMarius Strobl 			else
24117195094cSMarius Strobl 				p.expire = maxexpire;
2412743eee66SSUZUKI Shinsuke 		}
24137195094cSMarius Strobl 		p.refcnt = pr->ndpr_refcnt;
24147195094cSMarius Strobl 		p.flags = pr->ndpr_stateflags;
24157195094cSMarius Strobl 		p.advrtrs = 0;
24167195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry)
24177195094cSMarius Strobl 			p.advrtrs++;
24187195094cSMarius Strobl 		error = SYSCTL_OUT(req, &p, sizeof(p));
24197195094cSMarius Strobl 		if (error != 0)
242007eb2995SHajimu UMEMOTO 			return (error);
24217195094cSMarius Strobl 		LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) {
24227195094cSMarius Strobl 			s6.sin6_addr = pfr->router->rtaddr;
24237195094cSMarius Strobl 			if (sa6_recoverscope(&s6))
24247195094cSMarius Strobl 				log(LOG_ERR,
24257195094cSMarius Strobl 				    "scope error in prefix list (%s)\n",
24267195094cSMarius Strobl 				    ip6_sprintf(ip6buf, &pfr->router->rtaddr));
24277195094cSMarius Strobl 			error = SYSCTL_OUT(req, &s6, sizeof(s6));
24287195094cSMarius Strobl 			if (error != 0)
24297195094cSMarius Strobl 				return (error);
24307195094cSMarius Strobl 		}
24317195094cSMarius Strobl 	}
24327195094cSMarius Strobl 	return (0);
243333841545SHajimu UMEMOTO }
2434