1caf43b02SWarner Losh /*- 282cd038dSYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 382cd038dSYoshinobu Inoue * All rights reserved. 482cd038dSYoshinobu Inoue * 582cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 682cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 782cd038dSYoshinobu Inoue * are met: 882cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 982cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1082cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1182cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1282cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1382cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1482cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1582cd038dSYoshinobu Inoue * without specific prior written permission. 1682cd038dSYoshinobu Inoue * 1782cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1882cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1982cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2082cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2182cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2282cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2382cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2482cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2582cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2682cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2782cd038dSYoshinobu Inoue * SUCH DAMAGE. 28b48287a3SDavid E. O'Brien * 29b48287a3SDavid E. O'Brien * $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $ 3082cd038dSYoshinobu Inoue */ 3182cd038dSYoshinobu Inoue 32b48287a3SDavid E. O'Brien #include <sys/cdefs.h> 33b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$"); 34b48287a3SDavid E. O'Brien 35686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 36686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 37686cdd19SJun-ichiro itojun Hagino 3882cd038dSYoshinobu Inoue #include <sys/param.h> 3982cd038dSYoshinobu Inoue #include <sys/systm.h> 4033841545SHajimu UMEMOTO #include <sys/callout.h> 4182cd038dSYoshinobu Inoue #include <sys/malloc.h> 4282cd038dSYoshinobu Inoue #include <sys/mbuf.h> 4382cd038dSYoshinobu Inoue #include <sys/socket.h> 4482cd038dSYoshinobu Inoue #include <sys/sockio.h> 4582cd038dSYoshinobu Inoue #include <sys/time.h> 4682cd038dSYoshinobu Inoue #include <sys/kernel.h> 47686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h> 4882cd038dSYoshinobu Inoue #include <sys/errno.h> 4982cd038dSYoshinobu Inoue #include <sys/syslog.h> 506e6b3f7cSQing Li #include <sys/lock.h> 516e6b3f7cSQing Li #include <sys/rwlock.h> 5282cd038dSYoshinobu Inoue #include <sys/queue.h> 5357f60867SMark Johnston #include <sys/sdt.h> 5433841545SHajimu UMEMOTO #include <sys/sysctl.h> 5582cd038dSYoshinobu Inoue 5682cd038dSYoshinobu Inoue #include <net/if.h> 5776039bc8SGleb Smirnoff #include <net/if_var.h> 5831b3783cSHajimu UMEMOTO #include <net/if_arc.h> 5982cd038dSYoshinobu Inoue #include <net/if_dl.h> 6082cd038dSYoshinobu Inoue #include <net/if_types.h> 612049fdeeSMatthew N. Dodd #include <net/iso88025.h> 628e5fd461SMatthew N. Dodd #include <net/fddi.h> 6382cd038dSYoshinobu Inoue #include <net/route.h> 644b79449eSBjoern A. Zeeb #include <net/vnet.h> 6582cd038dSYoshinobu Inoue 6682cd038dSYoshinobu Inoue #include <netinet/in.h> 6757f60867SMark Johnston #include <netinet/in_kdtrace.h> 686e6b3f7cSQing Li #include <net/if_llatbl.h> 6982cd038dSYoshinobu Inoue #include <netinet/if_ether.h> 7082cd038dSYoshinobu Inoue #include <netinet6/in6_var.h> 71686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 7282cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h> 73a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 7482cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 75a283298cSHiroki Sato #include <netinet6/in6_ifattach.h> 76686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 771db8d1f8SAna Kukec #include <netinet6/send.h> 7882cd038dSYoshinobu Inoue 79743eee66SSUZUKI Shinsuke #include <sys/limits.h> 80743eee66SSUZUKI Shinsuke 81aed55708SRobert Watson #include <security/mac/mac_framework.h> 82aed55708SRobert Watson 8382cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */ 8482cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */ 8582cd038dSYoshinobu Inoue 8647e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s)) 8782cd038dSYoshinobu Inoue 8882cea7e6SBjoern A. Zeeb /* timer values */ 8982cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune) = 1; /* walk list every 1 seconds */ 9082cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay) = 5; /* delay first probe time 5 second */ 9182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries) = 3; /* maximum unicast query */ 9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries) = 3; /* maximum multicast query */ 9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1; /* use loopback interface for 9482cea7e6SBjoern A. Zeeb * local traffic */ 9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer) = (60 * 60 * 24); /* 1 day: garbage 9682cea7e6SBjoern A. Zeeb * collection timer */ 97686cdd19SJun-ichiro itojun Hagino 98686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */ 993e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxndopt) = 10; /* max # of ND options allowed */ 10082cea7e6SBjoern A. Zeeb 10182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper 10282cea7e6SBjoern A. Zeeb * layer hints */ 1033e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved 10482cea7e6SBjoern A. Zeeb * ND entries */ 1051e77c105SRobert Watson #define V_nd6_maxndopt VNET(nd6_maxndopt) 1061e77c105SRobert Watson #define V_nd6_maxqueuelen VNET(nd6_maxqueuelen) 107686cdd19SJun-ichiro itojun Hagino 10882cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG 10982cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1; 11082cea7e6SBjoern A. Zeeb #else 11182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0; 11282cea7e6SBjoern A. Zeeb #endif 11333841545SHajimu UMEMOTO 11430aee131SAndrey V. Elsukov static eventhandler_tag lle_event_eh; 11530aee131SAndrey V. Elsukov 11682cd038dSYoshinobu Inoue /* for debugging? */ 1176e6b3f7cSQing Li #if 0 11882cd038dSYoshinobu Inoue static int nd6_inuse, nd6_allocated; 1196e6b3f7cSQing Li #endif 12082cd038dSYoshinobu Inoue 121eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter); 122eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix); 12382cd038dSYoshinobu Inoue 12482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL; 1251e77c105SRobert Watson #define V_nd6_recalc_reachtm_interval VNET(nd6_recalc_reachtm_interval) 12644e33a07SMarko Zec 1271db8d1f8SAna Kukec int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int); 1281db8d1f8SAna Kukec 1296f56329aSXin LI static int nd6_is_new_addr_neighbor(struct sockaddr_in6 *, 1306f56329aSXin LI struct ifnet *); 1319233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *); 1329233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *); 1339233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *); 1346e6b3f7cSQing Li static struct llentry *nd6_free(struct llentry *, int); 1359233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *); 1366e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *); 137f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 138d7968c29SAlexander V. Chernikov static int nd6_output_lle(struct ifnet *, struct ifnet *, struct mbuf *, 139d7968c29SAlexander V. Chernikov struct sockaddr_in6 *); 140abc1be90SAlexander V. Chernikov static int nd6_output_ifp(struct ifnet *, struct ifnet *, struct mbuf *, 141abc1be90SAlexander V. Chernikov struct sockaddr_in6 *); 14233841545SHajimu UMEMOTO 1433e288e62SDimitry Andric static VNET_DEFINE(struct callout, nd6_slowtimo_ch); 1441e77c105SRobert Watson #define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch) 145eddfbb76SRobert Watson 146eddfbb76SRobert Watson VNET_DEFINE(struct callout, nd6_timer_ch); 147eddfbb76SRobert Watson 14830aee131SAndrey V. Elsukov static void 14930aee131SAndrey V. Elsukov nd6_lle_event(void *arg __unused, struct llentry *lle, int evt) 15030aee131SAndrey V. Elsukov { 15130aee131SAndrey V. Elsukov struct rt_addrinfo rtinfo; 152314294deSAlexander V. Chernikov struct sockaddr_in6 dst; 15330aee131SAndrey V. Elsukov struct sockaddr_dl gw; 15430aee131SAndrey V. Elsukov struct ifnet *ifp; 15530aee131SAndrey V. Elsukov int type; 15630aee131SAndrey V. Elsukov 15730aee131SAndrey V. Elsukov LLE_WLOCK_ASSERT(lle); 15830aee131SAndrey V. Elsukov 159314294deSAlexander V. Chernikov if (lltable_get_af(lle->lle_tbl) != AF_INET6) 160314294deSAlexander V. Chernikov return; 161314294deSAlexander V. Chernikov 16230aee131SAndrey V. Elsukov switch (evt) { 16330aee131SAndrey V. Elsukov case LLENTRY_RESOLVED: 16430aee131SAndrey V. Elsukov type = RTM_ADD; 16530aee131SAndrey V. Elsukov KASSERT(lle->la_flags & LLE_VALID, 16630aee131SAndrey V. Elsukov ("%s: %p resolved but not valid?", __func__, lle)); 16730aee131SAndrey V. Elsukov break; 16830aee131SAndrey V. Elsukov case LLENTRY_EXPIRED: 16930aee131SAndrey V. Elsukov type = RTM_DELETE; 17030aee131SAndrey V. Elsukov break; 17130aee131SAndrey V. Elsukov default: 17230aee131SAndrey V. Elsukov return; 17330aee131SAndrey V. Elsukov } 17430aee131SAndrey V. Elsukov 175314294deSAlexander V. Chernikov ifp = lltable_get_ifp(lle->lle_tbl); 17630aee131SAndrey V. Elsukov 17730aee131SAndrey V. Elsukov bzero(&dst, sizeof(dst)); 17830aee131SAndrey V. Elsukov bzero(&gw, sizeof(gw)); 17930aee131SAndrey V. Elsukov bzero(&rtinfo, sizeof(rtinfo)); 180314294deSAlexander V. Chernikov lltable_fill_sa_entry(lle, (struct sockaddr *)&dst); 18130aee131SAndrey V. Elsukov dst.sin6_scope_id = in6_getscopezone(ifp, 182314294deSAlexander V. Chernikov in6_addrscope(&dst.sin6_addr)); 18330aee131SAndrey V. Elsukov gw.sdl_len = sizeof(struct sockaddr_dl); 18430aee131SAndrey V. Elsukov gw.sdl_family = AF_LINK; 18530aee131SAndrey V. Elsukov gw.sdl_alen = ifp->if_addrlen; 18630aee131SAndrey V. Elsukov gw.sdl_index = ifp->if_index; 18730aee131SAndrey V. Elsukov gw.sdl_type = ifp->if_type; 18830aee131SAndrey V. Elsukov if (evt == LLENTRY_RESOLVED) 18930aee131SAndrey V. Elsukov bcopy(&lle->ll_addr, gw.sdl_data, ifp->if_addrlen); 19030aee131SAndrey V. Elsukov rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst; 19130aee131SAndrey V. Elsukov rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw; 19230aee131SAndrey V. Elsukov rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY; 19330aee131SAndrey V. Elsukov rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | ( 19430aee131SAndrey V. Elsukov type == RTM_ADD ? RTF_UP: 0), 0, RT_DEFAULT_FIB); 19530aee131SAndrey V. Elsukov } 19630aee131SAndrey V. Elsukov 19782cd038dSYoshinobu Inoue void 1981272577eSXin LI nd6_init(void) 19982cd038dSYoshinobu Inoue { 20082cd038dSYoshinobu Inoue 20144e33a07SMarko Zec LIST_INIT(&V_nd_prefix); 20244e33a07SMarko Zec 203686cdd19SJun-ichiro itojun Hagino /* initialization of the default router list */ 204603724d3SBjoern A. Zeeb TAILQ_INIT(&V_nd_defrouter); 20582cea7e6SBjoern A. Zeeb 20682cd038dSYoshinobu Inoue /* start timer */ 207603724d3SBjoern A. Zeeb callout_init(&V_nd6_slowtimo_ch, 0); 208603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 209f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 210d6ad6a86SMark Johnston 211d6ad6a86SMark Johnston nd6_dad_init(); 21230aee131SAndrey V. Elsukov if (IS_DEFAULT_VNET(curvnet)) 21330aee131SAndrey V. Elsukov lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event, 21430aee131SAndrey V. Elsukov NULL, EVENTHANDLER_PRI_ANY); 21582cd038dSYoshinobu Inoue } 21682cd038dSYoshinobu Inoue 217bc29160dSMarko Zec #ifdef VIMAGE 218bc29160dSMarko Zec void 219bc29160dSMarko Zec nd6_destroy() 220bc29160dSMarko Zec { 221bc29160dSMarko Zec 222bc29160dSMarko Zec callout_drain(&V_nd6_slowtimo_ch); 223bc29160dSMarko Zec callout_drain(&V_nd6_timer_ch); 22430aee131SAndrey V. Elsukov if (IS_DEFAULT_VNET(curvnet)) 22530aee131SAndrey V. Elsukov EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh); 226bc29160dSMarko Zec } 227bc29160dSMarko Zec #endif 228bc29160dSMarko Zec 22931b1bfe1SHajimu UMEMOTO struct nd_ifinfo * 2301272577eSXin LI nd6_ifattach(struct ifnet *ifp) 23182cd038dSYoshinobu Inoue { 23231b1bfe1SHajimu UMEMOTO struct nd_ifinfo *nd; 23382cd038dSYoshinobu Inoue 23439e19560SBjoern A. Zeeb nd = (struct nd_ifinfo *)malloc(sizeof(*nd), M_IP6NDP, M_WAITOK|M_ZERO); 23531b1bfe1SHajimu UMEMOTO nd->initialized = 1; 23682cd038dSYoshinobu Inoue 23731b1bfe1SHajimu UMEMOTO nd->chlim = IPV6_DEFHLIM; 23831b1bfe1SHajimu UMEMOTO nd->basereachable = REACHABLE_TIME; 23931b1bfe1SHajimu UMEMOTO nd->reachable = ND_COMPUTE_RTIME(nd->basereachable); 24031b1bfe1SHajimu UMEMOTO nd->retrans = RETRANS_TIMER; 241a283298cSHiroki Sato 242a283298cSHiroki Sato nd->flags = ND6_IFF_PERFORMNUD; 243a283298cSHiroki Sato 244af805644SHiroki Sato /* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL. 245af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by 246af805644SHiroki Sato * default regardless of the V_ip6_auto_linklocal configuration to 247af805644SHiroki Sato * give a reasonable default behavior. 248af805644SHiroki Sato */ 249af805644SHiroki Sato if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) || 250af805644SHiroki Sato (ifp->if_flags & IFF_LOOPBACK)) 251a283298cSHiroki Sato nd->flags |= ND6_IFF_AUTO_LINKLOCAL; 252af805644SHiroki Sato /* 253af805644SHiroki Sato * A loopback interface does not need to accept RTADV. 254af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by 255af805644SHiroki Sato * default regardless of the V_ip6_accept_rtadv configuration to 256af805644SHiroki Sato * prevent the interface from accepting RA messages arrived 257af805644SHiroki Sato * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV. 258af805644SHiroki Sato */ 259af805644SHiroki Sato if (V_ip6_accept_rtadv && 260af805644SHiroki Sato !(ifp->if_flags & IFF_LOOPBACK) && 261af805644SHiroki Sato (ifp->if_type != IFT_BRIDGE)) 262a283298cSHiroki Sato nd->flags |= ND6_IFF_ACCEPT_RTADV; 263e7fa8d0aSHiroki Sato if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK)) 264e7fa8d0aSHiroki Sato nd->flags |= ND6_IFF_NO_RADR; 26531b1bfe1SHajimu UMEMOTO 26631b1bfe1SHajimu UMEMOTO /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */ 26731b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, nd); 26831b1bfe1SHajimu UMEMOTO 26931b1bfe1SHajimu UMEMOTO return nd; 27031b1bfe1SHajimu UMEMOTO } 27131b1bfe1SHajimu UMEMOTO 27231b1bfe1SHajimu UMEMOTO void 2731272577eSXin LI nd6_ifdetach(struct nd_ifinfo *nd) 27431b1bfe1SHajimu UMEMOTO { 27531b1bfe1SHajimu UMEMOTO 27631b1bfe1SHajimu UMEMOTO free(nd, M_IP6NDP); 27782cd038dSYoshinobu Inoue } 27882cd038dSYoshinobu Inoue 27982cd038dSYoshinobu Inoue /* 28082cd038dSYoshinobu Inoue * Reset ND level link MTU. This function is called when the physical MTU 28182cd038dSYoshinobu Inoue * changes, which means we might have to adjust the ND level MTU. 28282cd038dSYoshinobu Inoue */ 28382cd038dSYoshinobu Inoue void 2841272577eSXin LI nd6_setmtu(struct ifnet *ifp) 28582cd038dSYoshinobu Inoue { 28631b1bfe1SHajimu UMEMOTO 28731b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, ND_IFINFO(ifp)); 28831b1bfe1SHajimu UMEMOTO } 28931b1bfe1SHajimu UMEMOTO 29031b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */ 29131b1bfe1SHajimu UMEMOTO void 2921272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi) 29331b1bfe1SHajimu UMEMOTO { 29431b3783cSHajimu UMEMOTO u_int32_t omaxmtu; 29531b1bfe1SHajimu UMEMOTO 29631b3783cSHajimu UMEMOTO omaxmtu = ndi->maxmtu; 29782cd038dSYoshinobu Inoue 29882cd038dSYoshinobu Inoue switch (ifp->if_type) { 29931b3783cSHajimu UMEMOTO case IFT_ARCNET: 30031b3783cSHajimu UMEMOTO ndi->maxmtu = MIN(ARC_PHDS_MAXMTU, ifp->if_mtu); /* RFC2497 */ 30182cd038dSYoshinobu Inoue break; 30282cd038dSYoshinobu Inoue case IFT_FDDI: 30331b3783cSHajimu UMEMOTO ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu); /* RFC2467 */ 30482cd038dSYoshinobu Inoue break; 3052049fdeeSMatthew N. Dodd case IFT_ISO88025: 3062049fdeeSMatthew N. Dodd ndi->maxmtu = MIN(ISO88025_MAX_MTU, ifp->if_mtu); 3072049fdeeSMatthew N. Dodd break; 30882cd038dSYoshinobu Inoue default: 30982cd038dSYoshinobu Inoue ndi->maxmtu = ifp->if_mtu; 31082cd038dSYoshinobu Inoue break; 31182cd038dSYoshinobu Inoue } 31282cd038dSYoshinobu Inoue 31382cd038dSYoshinobu Inoue /* 31431b3783cSHajimu UMEMOTO * Decreasing the interface MTU under IPV6 minimum MTU may cause 31531b3783cSHajimu UMEMOTO * undesirable situation. We thus notify the operator of the change 31631b3783cSHajimu UMEMOTO * explicitly. The check for omaxmtu is necessary to restrict the 31731b3783cSHajimu UMEMOTO * log to the case of changing the MTU, not initializing it. 31882cd038dSYoshinobu Inoue */ 31931b3783cSHajimu UMEMOTO if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) { 32031b3783cSHajimu UMEMOTO log(LOG_NOTICE, "nd6_setmtu0: " 32131b3783cSHajimu UMEMOTO "new link MTU on %s (%lu) is too small for IPv6\n", 32231b3783cSHajimu UMEMOTO if_name(ifp), (unsigned long)ndi->maxmtu); 32382cd038dSYoshinobu Inoue } 32431b3783cSHajimu UMEMOTO 325603724d3SBjoern A. Zeeb if (ndi->maxmtu > V_in6_maxmtu) 32631b3783cSHajimu UMEMOTO in6_setmaxmtu(); /* check all interfaces just in case */ 32731b3783cSHajimu UMEMOTO 32882cd038dSYoshinobu Inoue } 32982cd038dSYoshinobu Inoue 33082cd038dSYoshinobu Inoue void 3311272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts) 33282cd038dSYoshinobu Inoue { 33307eb2995SHajimu UMEMOTO 33482cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 33582cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 33682cd038dSYoshinobu Inoue ndopts->nd_opts_last 33782cd038dSYoshinobu Inoue = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 33882cd038dSYoshinobu Inoue 33982cd038dSYoshinobu Inoue if (icmp6len == 0) { 34082cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 34182cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 34282cd038dSYoshinobu Inoue } 34382cd038dSYoshinobu Inoue } 34482cd038dSYoshinobu Inoue 34582cd038dSYoshinobu Inoue /* 34682cd038dSYoshinobu Inoue * Take one ND option. 34782cd038dSYoshinobu Inoue */ 34882cd038dSYoshinobu Inoue struct nd_opt_hdr * 3491272577eSXin LI nd6_option(union nd_opts *ndopts) 35082cd038dSYoshinobu Inoue { 35182cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 35282cd038dSYoshinobu Inoue int olen; 35382cd038dSYoshinobu Inoue 35439e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 35539e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 35639e19560SBjoern A. Zeeb __func__)); 3572ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 35882cd038dSYoshinobu Inoue return NULL; 35982cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 36082cd038dSYoshinobu Inoue return NULL; 36182cd038dSYoshinobu Inoue 36282cd038dSYoshinobu Inoue nd_opt = ndopts->nd_opts_search; 36382cd038dSYoshinobu Inoue 36419391949SKris Kennaway /* make sure nd_opt_len is inside the buffer */ 36519391949SKris Kennaway if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) { 36619391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 36719391949SKris Kennaway return NULL; 36819391949SKris Kennaway } 36919391949SKris Kennaway 37082cd038dSYoshinobu Inoue olen = nd_opt->nd_opt_len << 3; 37182cd038dSYoshinobu Inoue if (olen == 0) { 37282cd038dSYoshinobu Inoue /* 37382cd038dSYoshinobu Inoue * Message validation requires that all included 37482cd038dSYoshinobu Inoue * options have a length that is greater than zero. 37582cd038dSYoshinobu Inoue */ 37682cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 37782cd038dSYoshinobu Inoue return NULL; 37882cd038dSYoshinobu Inoue } 37982cd038dSYoshinobu Inoue 38082cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 38119391949SKris Kennaway if (ndopts->nd_opts_search > ndopts->nd_opts_last) { 38219391949SKris Kennaway /* option overruns the end of buffer, invalid */ 38319391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 38419391949SKris Kennaway return NULL; 38519391949SKris Kennaway } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) { 38619391949SKris Kennaway /* reached the end of options chain */ 38782cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 38882cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 38982cd038dSYoshinobu Inoue } 39082cd038dSYoshinobu Inoue return nd_opt; 39182cd038dSYoshinobu Inoue } 39282cd038dSYoshinobu Inoue 39382cd038dSYoshinobu Inoue /* 39482cd038dSYoshinobu Inoue * Parse multiple ND options. 39582cd038dSYoshinobu Inoue * This function is much easier to use, for ND routines that do not need 39682cd038dSYoshinobu Inoue * multiple options of the same type. 39782cd038dSYoshinobu Inoue */ 39882cd038dSYoshinobu Inoue int 3991272577eSXin LI nd6_options(union nd_opts *ndopts) 40082cd038dSYoshinobu Inoue { 40182cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 40282cd038dSYoshinobu Inoue int i = 0; 40382cd038dSYoshinobu Inoue 40439e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 40539e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 40639e19560SBjoern A. Zeeb __func__)); 4072ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 40882cd038dSYoshinobu Inoue return 0; 40982cd038dSYoshinobu Inoue 41082cd038dSYoshinobu Inoue while (1) { 41182cd038dSYoshinobu Inoue nd_opt = nd6_option(ndopts); 4122ce62dceSSUZUKI Shinsuke if (nd_opt == NULL && ndopts->nd_opts_last == NULL) { 41382cd038dSYoshinobu Inoue /* 41482cd038dSYoshinobu Inoue * Message validation requires that all included 41582cd038dSYoshinobu Inoue * options have a length that is greater than zero. 41682cd038dSYoshinobu Inoue */ 417e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_badopt); 41882cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 41982cd038dSYoshinobu Inoue return -1; 42082cd038dSYoshinobu Inoue } 42182cd038dSYoshinobu Inoue 4222ce62dceSSUZUKI Shinsuke if (nd_opt == NULL) 42382cd038dSYoshinobu Inoue goto skip1; 42482cd038dSYoshinobu Inoue 42582cd038dSYoshinobu Inoue switch (nd_opt->nd_opt_type) { 42682cd038dSYoshinobu Inoue case ND_OPT_SOURCE_LINKADDR: 42782cd038dSYoshinobu Inoue case ND_OPT_TARGET_LINKADDR: 42882cd038dSYoshinobu Inoue case ND_OPT_MTU: 42982cd038dSYoshinobu Inoue case ND_OPT_REDIRECTED_HEADER: 43011d8451dSHiroki Sato case ND_OPT_NONCE: 43182cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 43233841545SHajimu UMEMOTO nd6log((LOG_INFO, 43333841545SHajimu UMEMOTO "duplicated ND6 option found (type=%d)\n", 43433841545SHajimu UMEMOTO nd_opt->nd_opt_type)); 43582cd038dSYoshinobu Inoue /* XXX bark? */ 43682cd038dSYoshinobu Inoue } else { 43782cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 43882cd038dSYoshinobu Inoue = nd_opt; 43982cd038dSYoshinobu Inoue } 44082cd038dSYoshinobu Inoue break; 44182cd038dSYoshinobu Inoue case ND_OPT_PREFIX_INFORMATION: 44282cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 44382cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 44482cd038dSYoshinobu Inoue = nd_opt; 44582cd038dSYoshinobu Inoue } 44682cd038dSYoshinobu Inoue ndopts->nd_opts_pi_end = 44782cd038dSYoshinobu Inoue (struct nd_opt_prefix_info *)nd_opt; 44882cd038dSYoshinobu Inoue break; 449abbe8356SBjoern A. Zeeb /* What about ND_OPT_ROUTE_INFO? RFC 4191 */ 450abbe8356SBjoern A. Zeeb case ND_OPT_RDNSS: /* RFC 6106 */ 451abbe8356SBjoern A. Zeeb case ND_OPT_DNSSL: /* RFC 6106 */ 452abbe8356SBjoern A. Zeeb /* 453abbe8356SBjoern A. Zeeb * Silently ignore options we know and do not care about 454abbe8356SBjoern A. Zeeb * in the kernel. 455abbe8356SBjoern A. Zeeb */ 456abbe8356SBjoern A. Zeeb break; 45782cd038dSYoshinobu Inoue default: 45882cd038dSYoshinobu Inoue /* 45982cd038dSYoshinobu Inoue * Unknown options must be silently ignored, 46082cd038dSYoshinobu Inoue * to accomodate future extension to the protocol. 46182cd038dSYoshinobu Inoue */ 46233841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 46382cd038dSYoshinobu Inoue "nd6_options: unsupported option %d - " 46433841545SHajimu UMEMOTO "option ignored\n", nd_opt->nd_opt_type)); 46582cd038dSYoshinobu Inoue } 46682cd038dSYoshinobu Inoue 46782cd038dSYoshinobu Inoue skip1: 46882cd038dSYoshinobu Inoue i++; 469603724d3SBjoern A. Zeeb if (i > V_nd6_maxndopt) { 470e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_toomanyopt); 47133841545SHajimu UMEMOTO nd6log((LOG_INFO, "too many loop in nd opt\n")); 47282cd038dSYoshinobu Inoue break; 47382cd038dSYoshinobu Inoue } 47482cd038dSYoshinobu Inoue 47582cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 47682cd038dSYoshinobu Inoue break; 47782cd038dSYoshinobu Inoue } 47882cd038dSYoshinobu Inoue 47982cd038dSYoshinobu Inoue return 0; 48082cd038dSYoshinobu Inoue } 48182cd038dSYoshinobu Inoue 48282cd038dSYoshinobu Inoue /* 483743eee66SSUZUKI Shinsuke * ND6 timer routine to handle ND6 entries 48482cd038dSYoshinobu Inoue */ 48582cd038dSYoshinobu Inoue void 4866e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick) 487743eee66SSUZUKI Shinsuke { 488ef8d671cSHajimu UMEMOTO int canceled; 489ef8d671cSHajimu UMEMOTO 490e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 491e6950476SBjoern A. Zeeb 492743eee66SSUZUKI Shinsuke if (tick < 0) { 4936e6b3f7cSQing Li ln->la_expire = 0; 494743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 4950447c136SAlexander V. Chernikov canceled = callout_stop(&ln->lle_timer); 496743eee66SSUZUKI Shinsuke } else { 4977d26db17SHiroki Sato ln->la_expire = time_uptime + tick / hz; 4986e6b3f7cSQing Li LLE_ADDREF(ln); 499743eee66SSUZUKI Shinsuke if (tick > INT_MAX) { 500743eee66SSUZUKI Shinsuke ln->ln_ntick = tick - INT_MAX; 5010447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, INT_MAX, 502743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 503743eee66SSUZUKI Shinsuke } else { 504743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 5050447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, tick, 506743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 507743eee66SSUZUKI Shinsuke } 508743eee66SSUZUKI Shinsuke } 509ef8d671cSHajimu UMEMOTO if (canceled) 510ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 511743eee66SSUZUKI Shinsuke } 51282cd038dSYoshinobu Inoue 51326deb882SAlexander V. Chernikov /* 51426deb882SAlexander V. Chernikov * Gets source address of the first packet in hold queue 51526deb882SAlexander V. Chernikov * and stores it in @src. 51626deb882SAlexander V. Chernikov * Returns pointer to @src (if hold queue is not empty) or NULL. 51726deb882SAlexander V. Chernikov * 51826deb882SAlexander V. Chernikov */ 51926deb882SAlexander V. Chernikov static struct in6_addr * 52026deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src) 52126deb882SAlexander V. Chernikov { 52226deb882SAlexander V. Chernikov struct ip6_hdr hdr; 52326deb882SAlexander V. Chernikov struct mbuf *m; 52426deb882SAlexander V. Chernikov 52526deb882SAlexander V. Chernikov if (ln->la_hold == NULL) 52626deb882SAlexander V. Chernikov return (NULL); 52726deb882SAlexander V. Chernikov 52826deb882SAlexander V. Chernikov /* 52926deb882SAlexander V. Chernikov * assume every packet in la_hold has the same IP header 53026deb882SAlexander V. Chernikov */ 53126deb882SAlexander V. Chernikov m = ln->la_hold; 53226deb882SAlexander V. Chernikov if (sizeof(hdr) < m->m_len) 53326deb882SAlexander V. Chernikov return (NULL); 53426deb882SAlexander V. Chernikov 53526deb882SAlexander V. Chernikov m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr); 53626deb882SAlexander V. Chernikov *src = hdr.ip6_src; 53726deb882SAlexander V. Chernikov 53826deb882SAlexander V. Chernikov return (src); 53926deb882SAlexander V. Chernikov } 54026deb882SAlexander V. Chernikov 5416e6b3f7cSQing Li void 5426e6b3f7cSQing Li nd6_llinfo_settimer(struct llentry *ln, long tick) 5436e6b3f7cSQing Li { 5446e6b3f7cSQing Li 5456e6b3f7cSQing Li LLE_WLOCK(ln); 5466e6b3f7cSQing Li nd6_llinfo_settimer_locked(ln, tick); 5476e6b3f7cSQing Li LLE_WUNLOCK(ln); 5486e6b3f7cSQing Li } 5496e6b3f7cSQing Li 550743eee66SSUZUKI Shinsuke static void 5511272577eSXin LI nd6_llinfo_timer(void *arg) 552743eee66SSUZUKI Shinsuke { 5536e6b3f7cSQing Li struct llentry *ln; 55426deb882SAlexander V. Chernikov struct in6_addr *dst, *pdst, *psrc, src; 555743eee66SSUZUKI Shinsuke struct ifnet *ifp; 556686cdd19SJun-ichiro itojun Hagino struct nd_ifinfo *ndi = NULL; 55726deb882SAlexander V. Chernikov int send_ns; 55882cd038dSYoshinobu Inoue 55919291ab3SBjoern A. Zeeb KASSERT(arg != NULL, ("%s: arg NULL", __func__)); 5606e6b3f7cSQing Li ln = (struct llentry *)arg; 5612575fbb8SRandall Stewart LLE_WLOCK(ln); 5620447c136SAlexander V. Chernikov if (callout_pending(&ln->lle_timer)) { 5632575fbb8SRandall Stewart /* 5642575fbb8SRandall Stewart * Here we are a bit odd here in the treatment of 5652575fbb8SRandall Stewart * active/pending. If the pending bit is set, it got 5662575fbb8SRandall Stewart * rescheduled before I ran. The active 5672575fbb8SRandall Stewart * bit we ignore, since if it was stopped 5682575fbb8SRandall Stewart * in ll_tablefree() and was currently running 5692575fbb8SRandall Stewart * it would have return 0 so the code would 5702575fbb8SRandall Stewart * not have deleted it since the callout could 5712575fbb8SRandall Stewart * not be stopped so we want to go through 5722575fbb8SRandall Stewart * with the delete here now. If the callout 5732575fbb8SRandall Stewart * was restarted, the pending bit will be back on and 5742575fbb8SRandall Stewart * we just want to bail since the callout_reset would 5752575fbb8SRandall Stewart * return 1 and our reference would have been removed 5762575fbb8SRandall Stewart * by nd6_llinfo_settimer_locked above since canceled 5772575fbb8SRandall Stewart * would have been 1. 5782575fbb8SRandall Stewart */ 5792575fbb8SRandall Stewart LLE_WUNLOCK(ln); 5802575fbb8SRandall Stewart return; 5812575fbb8SRandall Stewart } 58219291ab3SBjoern A. Zeeb ifp = ln->lle_tbl->llt_ifp; 5836e6b3f7cSQing Li CURVNET_SET(ifp->if_vnet); 58426deb882SAlexander V. Chernikov ndi = ND_IFINFO(ifp); 58526deb882SAlexander V. Chernikov send_ns = 0; 58626deb882SAlexander V. Chernikov dst = &ln->r_l3addr.addr6; 58726deb882SAlexander V. Chernikov pdst = dst; 58882cd038dSYoshinobu Inoue 589743eee66SSUZUKI Shinsuke if (ln->ln_ntick > 0) { 590743eee66SSUZUKI Shinsuke if (ln->ln_ntick > INT_MAX) { 591743eee66SSUZUKI Shinsuke ln->ln_ntick -= INT_MAX; 592e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, INT_MAX); 593743eee66SSUZUKI Shinsuke } else { 594743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 595e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, ln->ln_ntick); 59682cd038dSYoshinobu Inoue } 5976e6b3f7cSQing Li goto done; 598743eee66SSUZUKI Shinsuke } 599743eee66SSUZUKI Shinsuke 600287e3cb4SHajimu UMEMOTO if (ln->la_flags & LLE_STATIC) { 6016e6b3f7cSQing Li goto done; 6026e6b3f7cSQing Li } 60382cd038dSYoshinobu Inoue 6046e6b3f7cSQing Li if (ln->la_flags & LLE_DELETED) { 6056e6b3f7cSQing Li (void)nd6_free(ln, 0); 6062eb10edcSHajimu UMEMOTO ln = NULL; 6076e6b3f7cSQing Li goto done; 6086e6b3f7cSQing Li } 60982cd038dSYoshinobu Inoue 61082cd038dSYoshinobu Inoue switch (ln->ln_state) { 61182cd038dSYoshinobu Inoue case ND6_LLINFO_INCOMPLETE: 6126e6b3f7cSQing Li if (ln->la_asked < V_nd6_mmaxtries) { 6136e6b3f7cSQing Li ln->la_asked++; 61426deb882SAlexander V. Chernikov send_ns = 1; 61526deb882SAlexander V. Chernikov /* Send NS to multicast address */ 61626deb882SAlexander V. Chernikov pdst = NULL; 61782cd038dSYoshinobu Inoue } else { 6186e6b3f7cSQing Li struct mbuf *m = ln->la_hold; 61982cd038dSYoshinobu Inoue if (m) { 62031d4137bSSUZUKI Shinsuke struct mbuf *m0; 62131d4137bSSUZUKI Shinsuke 62282cd038dSYoshinobu Inoue /* 6236e6b3f7cSQing Li * assuming every packet in la_hold has the 624e6950476SBjoern A. Zeeb * same IP header. Send error after unlock. 62582cd038dSYoshinobu Inoue */ 62631d4137bSSUZUKI Shinsuke m0 = m->m_nextpkt; 62731d4137bSSUZUKI Shinsuke m->m_nextpkt = NULL; 6286e6b3f7cSQing Li ln->la_hold = m0; 62931d4137bSSUZUKI Shinsuke clear_llinfo_pqueue(ln); 63082cd038dSYoshinobu Inoue } 63163a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_TIMEDOUT); 6326e6b3f7cSQing Li (void)nd6_free(ln, 0); 633743eee66SSUZUKI Shinsuke ln = NULL; 634e6950476SBjoern A. Zeeb if (m != NULL) 635e6950476SBjoern A. Zeeb icmp6_error2(m, ICMP6_DST_UNREACH, 636e6950476SBjoern A. Zeeb ICMP6_DST_UNREACH_ADDR, 0, ifp); 63782cd038dSYoshinobu Inoue } 63882cd038dSYoshinobu Inoue break; 63982cd038dSYoshinobu Inoue case ND6_LLINFO_REACHABLE: 640743eee66SSUZUKI Shinsuke if (!ND6_LLINFO_PERMANENT(ln)) { 64182cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_STALE; 642e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz); 64333841545SHajimu UMEMOTO } 64482cd038dSYoshinobu Inoue break; 64533841545SHajimu UMEMOTO 64633841545SHajimu UMEMOTO case ND6_LLINFO_STALE: 64733841545SHajimu UMEMOTO /* Garbage Collection(RFC 2461 5.3) */ 648743eee66SSUZUKI Shinsuke if (!ND6_LLINFO_PERMANENT(ln)) { 64963a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED); 6506e6b3f7cSQing Li (void)nd6_free(ln, 1); 651743eee66SSUZUKI Shinsuke ln = NULL; 652743eee66SSUZUKI Shinsuke } 65333841545SHajimu UMEMOTO break; 65433841545SHajimu UMEMOTO 65582cd038dSYoshinobu Inoue case ND6_LLINFO_DELAY: 656686cdd19SJun-ichiro itojun Hagino if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) { 657686cdd19SJun-ichiro itojun Hagino /* We need NUD */ 6586e6b3f7cSQing Li ln->la_asked = 1; 65982cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_PROBE; 66026deb882SAlexander V. Chernikov send_ns = 1; 66133841545SHajimu UMEMOTO } else { 662686cdd19SJun-ichiro itojun Hagino ln->ln_state = ND6_LLINFO_STALE; /* XXX */ 663e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz); 66433841545SHajimu UMEMOTO } 66582cd038dSYoshinobu Inoue break; 66682cd038dSYoshinobu Inoue case ND6_LLINFO_PROBE: 6676e6b3f7cSQing Li if (ln->la_asked < V_nd6_umaxtries) { 6686e6b3f7cSQing Li ln->la_asked++; 66926deb882SAlexander V. Chernikov send_ns = 1; 67082cd038dSYoshinobu Inoue } else { 67163a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED); 6726e6b3f7cSQing Li (void)nd6_free(ln, 0); 673743eee66SSUZUKI Shinsuke ln = NULL; 67482cd038dSYoshinobu Inoue } 67582cd038dSYoshinobu Inoue break; 676e6950476SBjoern A. Zeeb default: 677e6950476SBjoern A. Zeeb panic("%s: paths in a dark night can be confusing: %d", 678e6950476SBjoern A. Zeeb __func__, ln->ln_state); 67982cd038dSYoshinobu Inoue } 6806e6b3f7cSQing Li done: 68126deb882SAlexander V. Chernikov if (send_ns != 0) { 68226deb882SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000); 68326deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(ln, &src); 68426deb882SAlexander V. Chernikov LLE_FREE_LOCKED(ln); 68526deb882SAlexander V. Chernikov ln = NULL; 68626deb882SAlexander V. Chernikov nd6_ns_output(ifp, psrc, pdst, dst, NULL); 68726deb882SAlexander V. Chernikov } 68826deb882SAlexander V. Chernikov 6896e6b3f7cSQing Li if (ln != NULL) 690e6950476SBjoern A. Zeeb LLE_FREE_LOCKED(ln); 691f0c0b143SHajimu UMEMOTO CURVNET_RESTORE(); 69282cd038dSYoshinobu Inoue } 69382cd038dSYoshinobu Inoue 694743eee66SSUZUKI Shinsuke 695743eee66SSUZUKI Shinsuke /* 696743eee66SSUZUKI Shinsuke * ND6 timer routine to expire default route list and prefix list 697743eee66SSUZUKI Shinsuke */ 698743eee66SSUZUKI Shinsuke void 6998b615593SMarko Zec nd6_timer(void *arg) 700743eee66SSUZUKI Shinsuke { 70121ca7b57SMarko Zec CURVNET_SET((struct vnet *) arg); 7023b0b2840SJohn Baldwin struct nd_defrouter *dr, *ndr; 7033b0b2840SJohn Baldwin struct nd_prefix *pr, *npr; 704743eee66SSUZUKI Shinsuke struct in6_ifaddr *ia6, *nia6; 705743eee66SSUZUKI Shinsuke 706603724d3SBjoern A. Zeeb callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz, 707f6dfe47aSMarko Zec nd6_timer, curvnet); 708743eee66SSUZUKI Shinsuke 70933841545SHajimu UMEMOTO /* expire default router list */ 7103b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 7117d26db17SHiroki Sato if (dr->expire && dr->expire < time_uptime) 71282cd038dSYoshinobu Inoue defrtrlist_del(dr); 713686cdd19SJun-ichiro itojun Hagino } 71482cd038dSYoshinobu Inoue 71533841545SHajimu UMEMOTO /* 71633841545SHajimu UMEMOTO * expire interface addresses. 71733841545SHajimu UMEMOTO * in the past the loop was inside prefix expiry processing. 71833841545SHajimu UMEMOTO * However, from a stricter speci-confrmance standpoint, we should 71933841545SHajimu UMEMOTO * rather separate address lifetimes and prefix lifetimes. 720d1da0a06SRobert Watson * 721d1da0a06SRobert Watson * XXXRW: in6_ifaddrhead locking. 72233841545SHajimu UMEMOTO */ 72333841545SHajimu UMEMOTO addrloop: 72480af0152SRobert Watson TAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) { 72582cd038dSYoshinobu Inoue /* check address lifetime */ 72633841545SHajimu UMEMOTO if (IFA6_IS_INVALID(ia6)) { 72733841545SHajimu UMEMOTO int regen = 0; 72833841545SHajimu UMEMOTO 72933841545SHajimu UMEMOTO /* 73033841545SHajimu UMEMOTO * If the expiring address is temporary, try 73133841545SHajimu UMEMOTO * regenerating a new one. This would be useful when 73288ff5695SSUZUKI Shinsuke * we suspended a laptop PC, then turned it on after a 73333841545SHajimu UMEMOTO * period that could invalidate all temporary 73433841545SHajimu UMEMOTO * addresses. Although we may have to restart the 73533841545SHajimu UMEMOTO * loop (see below), it must be after purging the 73633841545SHajimu UMEMOTO * address. Otherwise, we'd see an infinite loop of 73733841545SHajimu UMEMOTO * regeneration. 73833841545SHajimu UMEMOTO */ 739603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 74033841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) { 74133841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) 74233841545SHajimu UMEMOTO regen = 1; 74333841545SHajimu UMEMOTO } 74433841545SHajimu UMEMOTO 74533841545SHajimu UMEMOTO in6_purgeaddr(&ia6->ia_ifa); 74633841545SHajimu UMEMOTO 74733841545SHajimu UMEMOTO if (regen) 74833841545SHajimu UMEMOTO goto addrloop; /* XXX: see below */ 74943068328SHajimu UMEMOTO } else if (IFA6_IS_DEPRECATED(ia6)) { 75033841545SHajimu UMEMOTO int oldflags = ia6->ia6_flags; 75133841545SHajimu UMEMOTO 75282cd038dSYoshinobu Inoue ia6->ia6_flags |= IN6_IFF_DEPRECATED; 75333841545SHajimu UMEMOTO 75433841545SHajimu UMEMOTO /* 75533841545SHajimu UMEMOTO * If a temporary address has just become deprecated, 75633841545SHajimu UMEMOTO * regenerate a new one if possible. 75733841545SHajimu UMEMOTO */ 758603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 75933841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 76033841545SHajimu UMEMOTO (oldflags & IN6_IFF_DEPRECATED) == 0) { 76133841545SHajimu UMEMOTO 76233841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) { 76333841545SHajimu UMEMOTO /* 76433841545SHajimu UMEMOTO * A new temporary address is 76533841545SHajimu UMEMOTO * generated. 76633841545SHajimu UMEMOTO * XXX: this means the address chain 76733841545SHajimu UMEMOTO * has changed while we are still in 76833841545SHajimu UMEMOTO * the loop. Although the change 76933841545SHajimu UMEMOTO * would not cause disaster (because 77088ff5695SSUZUKI Shinsuke * it's not a deletion, but an 77188ff5695SSUZUKI Shinsuke * addition,) we'd rather restart the 77233841545SHajimu UMEMOTO * loop just for safety. Or does this 77333841545SHajimu UMEMOTO * significantly reduce performance?? 77433841545SHajimu UMEMOTO */ 77533841545SHajimu UMEMOTO goto addrloop; 77633841545SHajimu UMEMOTO } 77733841545SHajimu UMEMOTO } 77883649f07SHajimu UMEMOTO } else { 77933841545SHajimu UMEMOTO /* 78033841545SHajimu UMEMOTO * A new RA might have made a deprecated address 78133841545SHajimu UMEMOTO * preferred. 78233841545SHajimu UMEMOTO */ 78333841545SHajimu UMEMOTO ia6->ia6_flags &= ~IN6_IFF_DEPRECATED; 78482cd038dSYoshinobu Inoue } 78582cd038dSYoshinobu Inoue } 78682cd038dSYoshinobu Inoue 78733841545SHajimu UMEMOTO /* expire prefix list */ 7883b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 78982cd038dSYoshinobu Inoue /* 79082cd038dSYoshinobu Inoue * check prefix lifetime. 79182cd038dSYoshinobu Inoue * since pltime is just for autoconf, pltime processing for 79282cd038dSYoshinobu Inoue * prefix is not necessary. 79382cd038dSYoshinobu Inoue */ 794743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME && 7957d26db17SHiroki Sato time_uptime - pr->ndpr_lastupdate > pr->ndpr_vltime) { 79682cd038dSYoshinobu Inoue 79782cd038dSYoshinobu Inoue /* 79882cd038dSYoshinobu Inoue * address expiration and prefix expiration are 79933841545SHajimu UMEMOTO * separate. NEVER perform in6_purgeaddr here. 80082cd038dSYoshinobu Inoue */ 80182cd038dSYoshinobu Inoue prelist_remove(pr); 8023b0b2840SJohn Baldwin } 80382cd038dSYoshinobu Inoue } 8048b615593SMarko Zec CURVNET_RESTORE(); 80582cd038dSYoshinobu Inoue } 80682cd038dSYoshinobu Inoue 8071272577eSXin LI /* 8081272577eSXin LI * ia6 - deprecated/invalidated temporary address 8091272577eSXin LI */ 81033841545SHajimu UMEMOTO static int 8111272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6) 81233841545SHajimu UMEMOTO { 81333841545SHajimu UMEMOTO struct ifaddr *ifa; 81433841545SHajimu UMEMOTO struct ifnet *ifp; 81533841545SHajimu UMEMOTO struct in6_ifaddr *public_ifa6 = NULL; 81633841545SHajimu UMEMOTO 81733841545SHajimu UMEMOTO ifp = ia6->ia_ifa.ifa_ifp; 818137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 819c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 82033841545SHajimu UMEMOTO struct in6_ifaddr *it6; 82133841545SHajimu UMEMOTO 82233841545SHajimu UMEMOTO if (ifa->ifa_addr->sa_family != AF_INET6) 82333841545SHajimu UMEMOTO continue; 82433841545SHajimu UMEMOTO 82533841545SHajimu UMEMOTO it6 = (struct in6_ifaddr *)ifa; 82633841545SHajimu UMEMOTO 82733841545SHajimu UMEMOTO /* ignore no autoconf addresses. */ 82833841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0) 82933841545SHajimu UMEMOTO continue; 83033841545SHajimu UMEMOTO 83133841545SHajimu UMEMOTO /* ignore autoconf addresses with different prefixes. */ 83233841545SHajimu UMEMOTO if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr) 83333841545SHajimu UMEMOTO continue; 83433841545SHajimu UMEMOTO 83533841545SHajimu UMEMOTO /* 83633841545SHajimu UMEMOTO * Now we are looking at an autoconf address with the same 83733841545SHajimu UMEMOTO * prefix as ours. If the address is temporary and is still 83833841545SHajimu UMEMOTO * preferred, do not create another one. It would be rare, but 83933841545SHajimu UMEMOTO * could happen, for example, when we resume a laptop PC after 84033841545SHajimu UMEMOTO * a long period. 84133841545SHajimu UMEMOTO */ 84233841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 84333841545SHajimu UMEMOTO !IFA6_IS_DEPRECATED(it6)) { 84433841545SHajimu UMEMOTO public_ifa6 = NULL; 84533841545SHajimu UMEMOTO break; 84633841545SHajimu UMEMOTO } 84733841545SHajimu UMEMOTO 84833841545SHajimu UMEMOTO /* 84933841545SHajimu UMEMOTO * This is a public autoconf address that has the same prefix 85033841545SHajimu UMEMOTO * as ours. If it is preferred, keep it. We can't break the 85133841545SHajimu UMEMOTO * loop here, because there may be a still-preferred temporary 85233841545SHajimu UMEMOTO * address with the prefix. 85333841545SHajimu UMEMOTO */ 85433841545SHajimu UMEMOTO if (!IFA6_IS_DEPRECATED(it6)) 85533841545SHajimu UMEMOTO public_ifa6 = it6; 856dff78447SMark Johnston } 857c1752bcdSQing Li if (public_ifa6 != NULL) 858c1752bcdSQing Li ifa_ref(&public_ifa6->ia_ifa); 859137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 86033841545SHajimu UMEMOTO 86133841545SHajimu UMEMOTO if (public_ifa6 != NULL) { 86233841545SHajimu UMEMOTO int e; 86333841545SHajimu UMEMOTO 864743eee66SSUZUKI Shinsuke if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) { 865c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 86633841545SHajimu UMEMOTO log(LOG_NOTICE, "regen_tmpaddr: failed to create a new" 86733841545SHajimu UMEMOTO " tmp addr,errno=%d\n", e); 86833841545SHajimu UMEMOTO return (-1); 86933841545SHajimu UMEMOTO } 870c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 87133841545SHajimu UMEMOTO return (0); 87233841545SHajimu UMEMOTO } 87333841545SHajimu UMEMOTO 87433841545SHajimu UMEMOTO return (-1); 87533841545SHajimu UMEMOTO } 87633841545SHajimu UMEMOTO 877686cdd19SJun-ichiro itojun Hagino /* 878686cdd19SJun-ichiro itojun Hagino * Nuke neighbor cache/prefix/default router management table, right before 879686cdd19SJun-ichiro itojun Hagino * ifp goes away. 880686cdd19SJun-ichiro itojun Hagino */ 881686cdd19SJun-ichiro itojun Hagino void 8821272577eSXin LI nd6_purge(struct ifnet *ifp) 883686cdd19SJun-ichiro itojun Hagino { 884743eee66SSUZUKI Shinsuke struct nd_defrouter *dr, *ndr; 885686cdd19SJun-ichiro itojun Hagino struct nd_prefix *pr, *npr; 886686cdd19SJun-ichiro itojun Hagino 887686cdd19SJun-ichiro itojun Hagino /* 888743eee66SSUZUKI Shinsuke * Nuke default router list entries toward ifp. 889743eee66SSUZUKI Shinsuke * We defer removal of default router list entries that is installed 890743eee66SSUZUKI Shinsuke * in the routing table, in order to keep additional side effects as 891743eee66SSUZUKI Shinsuke * small as possible. 892686cdd19SJun-ichiro itojun Hagino */ 8933b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 894743eee66SSUZUKI Shinsuke if (dr->installed) 895743eee66SSUZUKI Shinsuke continue; 896743eee66SSUZUKI Shinsuke 897686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 898686cdd19SJun-ichiro itojun Hagino defrtrlist_del(dr); 899686cdd19SJun-ichiro itojun Hagino } 900743eee66SSUZUKI Shinsuke 9013b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 902743eee66SSUZUKI Shinsuke if (!dr->installed) 903743eee66SSUZUKI Shinsuke continue; 904743eee66SSUZUKI Shinsuke 905686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 906686cdd19SJun-ichiro itojun Hagino defrtrlist_del(dr); 907686cdd19SJun-ichiro itojun Hagino } 908686cdd19SJun-ichiro itojun Hagino 909686cdd19SJun-ichiro itojun Hagino /* Nuke prefix list entries toward ifp */ 9103b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 911686cdd19SJun-ichiro itojun Hagino if (pr->ndpr_ifp == ifp) { 91233841545SHajimu UMEMOTO /* 913743eee66SSUZUKI Shinsuke * Because if_detach() does *not* release prefixes 914743eee66SSUZUKI Shinsuke * while purging addresses the reference count will 915743eee66SSUZUKI Shinsuke * still be above zero. We therefore reset it to 916743eee66SSUZUKI Shinsuke * make sure that the prefix really gets purged. 917743eee66SSUZUKI Shinsuke */ 918743eee66SSUZUKI Shinsuke pr->ndpr_refcnt = 0; 919743eee66SSUZUKI Shinsuke 920743eee66SSUZUKI Shinsuke /* 92133841545SHajimu UMEMOTO * Previously, pr->ndpr_addr is removed as well, 92233841545SHajimu UMEMOTO * but I strongly believe we don't have to do it. 92333841545SHajimu UMEMOTO * nd6_purge() is only called from in6_ifdetach(), 92433841545SHajimu UMEMOTO * which removes all the associated interface addresses 92533841545SHajimu UMEMOTO * by itself. 92633841545SHajimu UMEMOTO * (jinmei@kame.net 20010129) 92733841545SHajimu UMEMOTO */ 928686cdd19SJun-ichiro itojun Hagino prelist_remove(pr); 929686cdd19SJun-ichiro itojun Hagino } 930686cdd19SJun-ichiro itojun Hagino } 931686cdd19SJun-ichiro itojun Hagino 932686cdd19SJun-ichiro itojun Hagino /* cancel default outgoing interface setting */ 933603724d3SBjoern A. Zeeb if (V_nd6_defifindex == ifp->if_index) 934686cdd19SJun-ichiro itojun Hagino nd6_setdefaultiface(0); 935686cdd19SJun-ichiro itojun Hagino 936e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 937a283298cSHiroki Sato /* Refresh default router list. */ 938686cdd19SJun-ichiro itojun Hagino defrouter_select(); 9396e6b3f7cSQing Li } 9406e6b3f7cSQing Li 9416e6b3f7cSQing Li /* XXXXX 9426e6b3f7cSQing Li * We do not nuke the neighbor cache entries here any more 9436e6b3f7cSQing Li * because the neighbor cache is kept in if_afdata[AF_INET6]. 9446e6b3f7cSQing Li * nd6_purge() is invoked by in6_ifdetach() which is called 9456e6b3f7cSQing Li * from if_detach() where everything gets purged. So let 9466e6b3f7cSQing Li * in6_domifdetach() do the actual L2 table purging work. 9476e6b3f7cSQing Li */ 9481026ccc4SHajimu UMEMOTO } 949686cdd19SJun-ichiro itojun Hagino 950686cdd19SJun-ichiro itojun Hagino /* 9516e6b3f7cSQing Li * the caller acquires and releases the lock on the lltbls 9526e6b3f7cSQing Li * Returns the llentry locked 953686cdd19SJun-ichiro itojun Hagino */ 9546e6b3f7cSQing Li struct llentry * 9556e6b3f7cSQing Li nd6_lookup(struct in6_addr *addr6, int flags, struct ifnet *ifp) 95682cd038dSYoshinobu Inoue { 95782cd038dSYoshinobu Inoue struct sockaddr_in6 sin6; 9586e6b3f7cSQing Li struct llentry *ln; 95968352503SBjoern A. Zeeb int llflags; 96082cd038dSYoshinobu Inoue 96182cd038dSYoshinobu Inoue bzero(&sin6, sizeof(sin6)); 96282cd038dSYoshinobu Inoue sin6.sin6_len = sizeof(struct sockaddr_in6); 96382cd038dSYoshinobu Inoue sin6.sin6_family = AF_INET6; 96482cd038dSYoshinobu Inoue sin6.sin6_addr = *addr6; 965686cdd19SJun-ichiro itojun Hagino 9666e6b3f7cSQing Li IF_AFDATA_LOCK_ASSERT(ifp); 96782cd038dSYoshinobu Inoue 968b4b1367aSAlexander V. Chernikov llflags = (flags & ND6_EXCLUSIVE) ? LLE_EXCLUSIVE : 0; 9696e6b3f7cSQing Li ln = lla_lookup(LLTABLE6(ifp), llflags, (struct sockaddr *)&sin6); 970b4b1367aSAlexander V. Chernikov 971b4b1367aSAlexander V. Chernikov return (ln); 972b4b1367aSAlexander V. Chernikov } 973b4b1367aSAlexander V. Chernikov 974b4b1367aSAlexander V. Chernikov struct llentry * 9755a255516SAlexander V. Chernikov nd6_alloc(struct in6_addr *addr6, int flags, struct ifnet *ifp) 976b4b1367aSAlexander V. Chernikov { 977b4b1367aSAlexander V. Chernikov struct sockaddr_in6 sin6; 978b4b1367aSAlexander V. Chernikov struct llentry *ln; 979b4b1367aSAlexander V. Chernikov 980b4b1367aSAlexander V. Chernikov bzero(&sin6, sizeof(sin6)); 981b4b1367aSAlexander V. Chernikov sin6.sin6_len = sizeof(struct sockaddr_in6); 982b4b1367aSAlexander V. Chernikov sin6.sin6_family = AF_INET6; 983b4b1367aSAlexander V. Chernikov sin6.sin6_addr = *addr6; 984b4b1367aSAlexander V. Chernikov 9855a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6); 986b4b1367aSAlexander V. Chernikov if (ln != NULL) 98782cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_NOSTATE; 9886e6b3f7cSQing Li 9896e6b3f7cSQing Li return (ln); 99082cd038dSYoshinobu Inoue } 99182cd038dSYoshinobu Inoue 99282cd038dSYoshinobu Inoue /* 99377b691e0SBrian Feldman * Test whether a given IPv6 address is a neighbor or not, ignoring 99477b691e0SBrian Feldman * the actual neighbor cache. The neighbor cache is ignored in order 99577b691e0SBrian Feldman * to not reenter the routing code from within itself. 99682cd038dSYoshinobu Inoue */ 99777b691e0SBrian Feldman static int 9981272577eSXin LI nd6_is_new_addr_neighbor(struct sockaddr_in6 *addr, struct ifnet *ifp) 99982cd038dSYoshinobu Inoue { 10004208ea14SHajimu UMEMOTO struct nd_prefix *pr; 1001743eee66SSUZUKI Shinsuke struct ifaddr *dstaddr; 100282cd038dSYoshinobu Inoue 1003686cdd19SJun-ichiro itojun Hagino /* 1004686cdd19SJun-ichiro itojun Hagino * A link-local address is always a neighbor. 10054208ea14SHajimu UMEMOTO * XXX: a link does not necessarily specify a single interface. 1006686cdd19SJun-ichiro itojun Hagino */ 1007a1f7e5f8SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) { 1008a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 sin6_copy; 1009a1f7e5f8SHajimu UMEMOTO u_int32_t zone; 1010a1f7e5f8SHajimu UMEMOTO 1011a1f7e5f8SHajimu UMEMOTO /* 1012a1f7e5f8SHajimu UMEMOTO * We need sin6_copy since sa6_recoverscope() may modify the 1013a1f7e5f8SHajimu UMEMOTO * content (XXX). 1014a1f7e5f8SHajimu UMEMOTO */ 1015a1f7e5f8SHajimu UMEMOTO sin6_copy = *addr; 1016a1f7e5f8SHajimu UMEMOTO if (sa6_recoverscope(&sin6_copy)) 1017a1f7e5f8SHajimu UMEMOTO return (0); /* XXX: should be impossible */ 1018a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone)) 1019a1f7e5f8SHajimu UMEMOTO return (0); 1020a1f7e5f8SHajimu UMEMOTO if (sin6_copy.sin6_scope_id == zone) 102182cd038dSYoshinobu Inoue return (1); 1022a1f7e5f8SHajimu UMEMOTO else 1023a1f7e5f8SHajimu UMEMOTO return (0); 1024a1f7e5f8SHajimu UMEMOTO } 102582cd038dSYoshinobu Inoue 102682cd038dSYoshinobu Inoue /* 102782cd038dSYoshinobu Inoue * If the address matches one of our addresses, 102882cd038dSYoshinobu Inoue * it should be a neighbor. 10294208ea14SHajimu UMEMOTO * If the address matches one of our on-link prefixes, it should be a 10304208ea14SHajimu UMEMOTO * neighbor. 103182cd038dSYoshinobu Inoue */ 10323b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 10334208ea14SHajimu UMEMOTO if (pr->ndpr_ifp != ifp) 10344208ea14SHajimu UMEMOTO continue; 103582cd038dSYoshinobu Inoue 1036baf7c373SQing Li if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) { 1037baf7c373SQing Li struct rtentry *rt; 103881d5d46bSBjoern A. Zeeb 103981d5d46bSBjoern A. Zeeb /* Always use the default FIB here. */ 104081d5d46bSBjoern A. Zeeb rt = in6_rtalloc1((struct sockaddr *)&pr->ndpr_prefix, 104181d5d46bSBjoern A. Zeeb 0, 0, RT_DEFAULT_FIB); 1042baf7c373SQing Li if (rt == NULL) 10434208ea14SHajimu UMEMOTO continue; 1044baf7c373SQing Li /* 1045baf7c373SQing Li * This is the case where multiple interfaces 1046baf7c373SQing Li * have the same prefix, but only one is installed 1047baf7c373SQing Li * into the routing table and that prefix entry 1048baf7c373SQing Li * is not the one being examined here. In the case 1049baf7c373SQing Li * where RADIX_MPATH is enabled, multiple route 1050baf7c373SQing Li * entries (of the same rt_key value) will be 1051baf7c373SQing Li * installed because the interface addresses all 1052baf7c373SQing Li * differ. 1053baf7c373SQing Li */ 1054baf7c373SQing Li if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 1055baf7c373SQing Li &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr)) { 1056baf7c373SQing Li RTFREE_LOCKED(rt); 1057baf7c373SQing Li continue; 1058baf7c373SQing Li } 1059baf7c373SQing Li RTFREE_LOCKED(rt); 1060baf7c373SQing Li } 10614208ea14SHajimu UMEMOTO 10624208ea14SHajimu UMEMOTO if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 10634208ea14SHajimu UMEMOTO &addr->sin6_addr, &pr->ndpr_mask)) 10644208ea14SHajimu UMEMOTO return (1); 106582cd038dSYoshinobu Inoue } 10664208ea14SHajimu UMEMOTO 10674208ea14SHajimu UMEMOTO /* 1068743eee66SSUZUKI Shinsuke * If the address is assigned on the node of the other side of 1069743eee66SSUZUKI Shinsuke * a p2p interface, the address should be a neighbor. 1070743eee66SSUZUKI Shinsuke */ 10714f8585e0SAlan Somers dstaddr = ifa_ifwithdstaddr((struct sockaddr *)addr, RT_ALL_FIBS); 10728c0fec80SRobert Watson if (dstaddr != NULL) { 10738c0fec80SRobert Watson if (dstaddr->ifa_ifp == ifp) { 10748c0fec80SRobert Watson ifa_free(dstaddr); 1075743eee66SSUZUKI Shinsuke return (1); 10768c0fec80SRobert Watson } 10778c0fec80SRobert Watson ifa_free(dstaddr); 10788c0fec80SRobert Watson } 1079743eee66SSUZUKI Shinsuke 1080743eee66SSUZUKI Shinsuke /* 10814208ea14SHajimu UMEMOTO * If the default router list is empty, all addresses are regarded 10824208ea14SHajimu UMEMOTO * as on-link, and thus, as a neighbor. 10834208ea14SHajimu UMEMOTO */ 1084e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV && 10853b0b2840SJohn Baldwin TAILQ_EMPTY(&V_nd_defrouter) && 1086603724d3SBjoern A. Zeeb V_nd6_defifindex == ifp->if_index) { 108782cd038dSYoshinobu Inoue return (1); 108882cd038dSYoshinobu Inoue } 108982cd038dSYoshinobu Inoue 109077b691e0SBrian Feldman return (0); 109177b691e0SBrian Feldman } 109277b691e0SBrian Feldman 109377b691e0SBrian Feldman 109477b691e0SBrian Feldman /* 109577b691e0SBrian Feldman * Detect if a given IPv6 address identifies a neighbor on a given link. 109677b691e0SBrian Feldman * XXX: should take care of the destination of a p2p link? 109777b691e0SBrian Feldman */ 109877b691e0SBrian Feldman int 10991272577eSXin LI nd6_is_addr_neighbor(struct sockaddr_in6 *addr, struct ifnet *ifp) 110077b691e0SBrian Feldman { 11016e6b3f7cSQing Li struct llentry *lle; 11026e6b3f7cSQing Li int rc = 0; 110377b691e0SBrian Feldman 11046e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 110577b691e0SBrian Feldman if (nd6_is_new_addr_neighbor(addr, ifp)) 110677b691e0SBrian Feldman return (1); 110777b691e0SBrian Feldman 110882cd038dSYoshinobu Inoue /* 110982cd038dSYoshinobu Inoue * Even if the address matches none of our addresses, it might be 111082cd038dSYoshinobu Inoue * in the neighbor cache. 111182cd038dSYoshinobu Inoue */ 111273cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 11136e6b3f7cSQing Li if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) { 11146e6b3f7cSQing Li LLE_RUNLOCK(lle); 11156e6b3f7cSQing Li rc = 1; 11166e6b3f7cSQing Li } 111773cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 11186e6b3f7cSQing Li return (rc); 111982cd038dSYoshinobu Inoue } 112082cd038dSYoshinobu Inoue 112182cd038dSYoshinobu Inoue /* 112282cd038dSYoshinobu Inoue * Free an nd6 llinfo entry. 1123743eee66SSUZUKI Shinsuke * Since the function would cause significant changes in the kernel, DO NOT 1124743eee66SSUZUKI Shinsuke * make it global, unless you have a strong reason for the change, and are sure 1125743eee66SSUZUKI Shinsuke * that the change is safe. 112682cd038dSYoshinobu Inoue */ 11276e6b3f7cSQing Li static struct llentry * 11286e6b3f7cSQing Li nd6_free(struct llentry *ln, int gc) 112982cd038dSYoshinobu Inoue { 11306e6b3f7cSQing Li struct llentry *next; 113182cd038dSYoshinobu Inoue struct nd_defrouter *dr; 1132e6950476SBjoern A. Zeeb struct ifnet *ifp; 1133e6950476SBjoern A. Zeeb 1134e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 113582cd038dSYoshinobu Inoue 113682cd038dSYoshinobu Inoue /* 113733841545SHajimu UMEMOTO * we used to have pfctlinput(PRC_HOSTDEAD) here. 113833841545SHajimu UMEMOTO * even though it is not harmful, it was not really necessary. 113982cd038dSYoshinobu Inoue */ 1140686cdd19SJun-ichiro itojun Hagino 1141743eee66SSUZUKI Shinsuke /* cancel timer */ 1142e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, -1); 1143e6950476SBjoern A. Zeeb 1144e6950476SBjoern A. Zeeb ifp = ln->lle_tbl->llt_ifp; 1145743eee66SSUZUKI Shinsuke 1146e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 1147314294deSAlexander V. Chernikov dr = defrouter_lookup(&ln->r_l3addr.addr6, ifp); 114833841545SHajimu UMEMOTO 1149743eee66SSUZUKI Shinsuke if (dr != NULL && dr->expire && 1150743eee66SSUZUKI Shinsuke ln->ln_state == ND6_LLINFO_STALE && gc) { 1151743eee66SSUZUKI Shinsuke /* 1152743eee66SSUZUKI Shinsuke * If the reason for the deletion is just garbage 1153743eee66SSUZUKI Shinsuke * collection, and the neighbor is an active default 1154743eee66SSUZUKI Shinsuke * router, do not delete it. Instead, reset the GC 1155743eee66SSUZUKI Shinsuke * timer using the router's lifetime. 1156743eee66SSUZUKI Shinsuke * Simply deleting the entry would affect default 1157743eee66SSUZUKI Shinsuke * router selection, which is not necessarily a good 1158743eee66SSUZUKI Shinsuke * thing, especially when we're using router preference 1159743eee66SSUZUKI Shinsuke * values. 1160743eee66SSUZUKI Shinsuke * XXX: the check for ln_state would be redundant, 1161743eee66SSUZUKI Shinsuke * but we intentionally keep it just in case. 1162743eee66SSUZUKI Shinsuke */ 11637d26db17SHiroki Sato if (dr->expire > time_uptime) 1164e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 11657d26db17SHiroki Sato (dr->expire - time_uptime) * hz); 1166743eee66SSUZUKI Shinsuke else 1167e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 1168e6950476SBjoern A. Zeeb (long)V_nd6_gctimer * hz); 1169e6950476SBjoern A. Zeeb 1170e6950476SBjoern A. Zeeb next = LIST_NEXT(ln, lle_next); 1171ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 1172ef8d671cSHajimu UMEMOTO LLE_WUNLOCK(ln); 1173e6950476SBjoern A. Zeeb return (next); 1174743eee66SSUZUKI Shinsuke } 1175743eee66SSUZUKI Shinsuke 1176686cdd19SJun-ichiro itojun Hagino if (dr) { 1177686cdd19SJun-ichiro itojun Hagino /* 1178686cdd19SJun-ichiro itojun Hagino * Unreachablity of a router might affect the default 1179686cdd19SJun-ichiro itojun Hagino * router selection and on-link detection of advertised 1180686cdd19SJun-ichiro itojun Hagino * prefixes. 1181686cdd19SJun-ichiro itojun Hagino */ 1182686cdd19SJun-ichiro itojun Hagino 1183686cdd19SJun-ichiro itojun Hagino /* 1184686cdd19SJun-ichiro itojun Hagino * Temporarily fake the state to choose a new default 1185686cdd19SJun-ichiro itojun Hagino * router and to perform on-link determination of 118688ff5695SSUZUKI Shinsuke * prefixes correctly. 1187686cdd19SJun-ichiro itojun Hagino * Below the state will be set correctly, 1188686cdd19SJun-ichiro itojun Hagino * or the entry itself will be deleted. 1189686cdd19SJun-ichiro itojun Hagino */ 1190686cdd19SJun-ichiro itojun Hagino ln->ln_state = ND6_LLINFO_INCOMPLETE; 11911d5089c2SBjoern A. Zeeb } 1192686cdd19SJun-ichiro itojun Hagino 11931d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) { 11941d5089c2SBjoern A. Zeeb 11951d5089c2SBjoern A. Zeeb /* 11961d5089c2SBjoern A. Zeeb * We need to unlock to avoid a LOR with rt6_flush() with the 11971d5089c2SBjoern A. Zeeb * rnh and for the calls to pfxlist_onlink_check() and 11981d5089c2SBjoern A. Zeeb * defrouter_select() in the block further down for calls 11991d5089c2SBjoern A. Zeeb * into nd6_lookup(). We still hold a ref. 12001d5089c2SBjoern A. Zeeb */ 12011d5089c2SBjoern A. Zeeb LLE_WUNLOCK(ln); 12021d5089c2SBjoern A. Zeeb 12031d5089c2SBjoern A. Zeeb /* 12041d5089c2SBjoern A. Zeeb * rt6_flush must be called whether or not the neighbor 12051d5089c2SBjoern A. Zeeb * is in the Default Router List. 12061d5089c2SBjoern A. Zeeb * See a corresponding comment in nd6_na_input(). 12071d5089c2SBjoern A. Zeeb */ 1208314294deSAlexander V. Chernikov rt6_flush(&ln->r_l3addr.addr6, ifp); 12091d5089c2SBjoern A. Zeeb } 12101d5089c2SBjoern A. Zeeb 12111d5089c2SBjoern A. Zeeb if (dr) { 121233841545SHajimu UMEMOTO /* 121333841545SHajimu UMEMOTO * Since defrouter_select() does not affect the 121433841545SHajimu UMEMOTO * on-link determination and MIP6 needs the check 121533841545SHajimu UMEMOTO * before the default router selection, we perform 121633841545SHajimu UMEMOTO * the check now. 121733841545SHajimu UMEMOTO */ 121833841545SHajimu UMEMOTO pfxlist_onlink_check(); 121933841545SHajimu UMEMOTO 1220686cdd19SJun-ichiro itojun Hagino /* 12211d5089c2SBjoern A. Zeeb * Refresh default router list. 1222686cdd19SJun-ichiro itojun Hagino */ 1223686cdd19SJun-ichiro itojun Hagino defrouter_select(); 1224686cdd19SJun-ichiro itojun Hagino } 12251d5089c2SBjoern A. Zeeb 12261d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) 12271d5089c2SBjoern A. Zeeb LLE_WLOCK(ln); 122882cd038dSYoshinobu Inoue } 122982cd038dSYoshinobu Inoue 123033841545SHajimu UMEMOTO /* 123133841545SHajimu UMEMOTO * Before deleting the entry, remember the next entry as the 123233841545SHajimu UMEMOTO * return value. We need this because pfxlist_onlink_check() above 123333841545SHajimu UMEMOTO * might have freed other entries (particularly the old next entry) as 123433841545SHajimu UMEMOTO * a side effect (XXX). 123533841545SHajimu UMEMOTO */ 12366e6b3f7cSQing Li next = LIST_NEXT(ln, lle_next); 1237686cdd19SJun-ichiro itojun Hagino 1238e6950476SBjoern A. Zeeb /* 1239e6950476SBjoern A. Zeeb * Save to unlock. We still hold an extra reference and will not 1240e6950476SBjoern A. Zeeb * free(9) in llentry_free() if someone else holds one as well. 1241e6950476SBjoern A. Zeeb */ 1242e6950476SBjoern A. Zeeb LLE_WUNLOCK(ln); 12436e6b3f7cSQing Li IF_AFDATA_LOCK(ifp); 12446e6b3f7cSQing Li LLE_WLOCK(ln); 1245b1ec2940SGleb Smirnoff 1246b1ec2940SGleb Smirnoff /* Guard against race with other llentry_free(). */ 1247b1ec2940SGleb Smirnoff if (ln->la_flags & LLE_LINKED) { 1248becba438SBjoern A. Zeeb LLE_REMREF(ln); 12496e6b3f7cSQing Li llentry_free(ln); 1250b1ec2940SGleb Smirnoff } else 1251b1ec2940SGleb Smirnoff LLE_FREE_LOCKED(ln); 1252b1ec2940SGleb Smirnoff 12536e6b3f7cSQing Li IF_AFDATA_UNLOCK(ifp); 125433841545SHajimu UMEMOTO 125533841545SHajimu UMEMOTO return (next); 125682cd038dSYoshinobu Inoue } 125782cd038dSYoshinobu Inoue 125882cd038dSYoshinobu Inoue /* 125982cd038dSYoshinobu Inoue * Upper-layer reachability hint for Neighbor Unreachability Detection. 126082cd038dSYoshinobu Inoue * 1261cd0fdcf7SHajimu UMEMOTO * XXX cost-effective methods? 126282cd038dSYoshinobu Inoue */ 126382cd038dSYoshinobu Inoue void 12641272577eSXin LI nd6_nud_hint(struct rtentry *rt, struct in6_addr *dst6, int force) 126582cd038dSYoshinobu Inoue { 12666e6b3f7cSQing Li struct llentry *ln; 12676e6b3f7cSQing Li struct ifnet *ifp; 126882cd038dSYoshinobu Inoue 12696e6b3f7cSQing Li if ((dst6 == NULL) || (rt == NULL)) 127082cd038dSYoshinobu Inoue return; 127182cd038dSYoshinobu Inoue 12726e6b3f7cSQing Li ifp = rt->rt_ifp; 1273ea0c3776SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 12746e6b3f7cSQing Li ln = nd6_lookup(dst6, ND6_EXCLUSIVE, NULL); 1275ea0c3776SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 12766e6b3f7cSQing Li if (ln == NULL) 127782cd038dSYoshinobu Inoue return; 127882cd038dSYoshinobu Inoue 1279ad8d5711SMunechika SUMIKAWA if (ln->ln_state < ND6_LLINFO_REACHABLE) 12806e6b3f7cSQing Li goto done; 128182cd038dSYoshinobu Inoue 1282686cdd19SJun-ichiro itojun Hagino /* 1283686cdd19SJun-ichiro itojun Hagino * if we get upper-layer reachability confirmation many times, 1284686cdd19SJun-ichiro itojun Hagino * it is possible we have false information. 1285686cdd19SJun-ichiro itojun Hagino */ 1286686cdd19SJun-ichiro itojun Hagino if (!force) { 1287686cdd19SJun-ichiro itojun Hagino ln->ln_byhint++; 12886e6b3f7cSQing Li if (ln->ln_byhint > V_nd6_maxnudhint) { 12896e6b3f7cSQing Li goto done; 12906e6b3f7cSQing Li } 1291686cdd19SJun-ichiro itojun Hagino } 1292686cdd19SJun-ichiro itojun Hagino 129382cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_REACHABLE; 1294743eee66SSUZUKI Shinsuke if (!ND6_LLINFO_PERMANENT(ln)) { 1295d715e397SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 1296743eee66SSUZUKI Shinsuke (long)ND_IFINFO(rt->rt_ifp)->reachable * hz); 1297743eee66SSUZUKI Shinsuke } 12986e6b3f7cSQing Li done: 12996e6b3f7cSQing Li LLE_WUNLOCK(ln); 130082cd038dSYoshinobu Inoue } 130182cd038dSYoshinobu Inoue 130282cd038dSYoshinobu Inoue 13030f1aca65SQing Li /* 13040f1aca65SQing Li * Rejuvenate this function for routing operations related 13050f1aca65SQing Li * processing. 13060f1aca65SQing Li */ 13070f1aca65SQing Li void 13080f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info) 13090f1aca65SQing Li { 131039e19560SBjoern A. Zeeb struct sockaddr_in6 *gateway; 13110f1aca65SQing Li struct nd_defrouter *dr; 131239e19560SBjoern A. Zeeb struct ifnet *ifp; 13130f1aca65SQing Li 131439e19560SBjoern A. Zeeb gateway = (struct sockaddr_in6 *)rt->rt_gateway; 131539e19560SBjoern A. Zeeb ifp = rt->rt_ifp; 13160f1aca65SQing Li 13170f1aca65SQing Li switch (req) { 13180f1aca65SQing Li case RTM_ADD: 13190f1aca65SQing Li break; 13200f1aca65SQing Li 13210f1aca65SQing Li case RTM_DELETE: 13220f1aca65SQing Li if (!ifp) 13230f1aca65SQing Li return; 13240f1aca65SQing Li /* 13250f1aca65SQing Li * Only indirect routes are interesting. 13260f1aca65SQing Li */ 13270f1aca65SQing Li if ((rt->rt_flags & RTF_GATEWAY) == 0) 13280f1aca65SQing Li return; 13290f1aca65SQing Li /* 13300f1aca65SQing Li * check for default route 13310f1aca65SQing Li */ 13320f1aca65SQing Li if (IN6_ARE_ADDR_EQUAL(&in6addr_any, 13330f1aca65SQing Li &SIN6(rt_key(rt))->sin6_addr)) { 13340f1aca65SQing Li 13350f1aca65SQing Li dr = defrouter_lookup(&gateway->sin6_addr, ifp); 13360f1aca65SQing Li if (dr != NULL) 13370f1aca65SQing Li dr->installed = 0; 13380f1aca65SQing Li } 13390f1aca65SQing Li break; 13400f1aca65SQing Li } 13410f1aca65SQing Li } 13420f1aca65SQing Li 13430f1aca65SQing Li 134482cd038dSYoshinobu Inoue int 13451272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp) 134682cd038dSYoshinobu Inoue { 134782cd038dSYoshinobu Inoue struct in6_ndireq *ndi = (struct in6_ndireq *)data; 134882cd038dSYoshinobu Inoue struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1349686cdd19SJun-ichiro itojun Hagino struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1350d0bec2c5SHiroki Sato int error = 0; 135182cd038dSYoshinobu Inoue 13520de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 13530de0dd9bSHiroki Sato return (EPFNOSUPPORT); 135482cd038dSYoshinobu Inoue switch (cmd) { 135533841545SHajimu UMEMOTO case OSIOCGIFINFO_IN6: 13562ce62dceSSUZUKI Shinsuke #define ND ndi->ndi 135731b1bfe1SHajimu UMEMOTO /* XXX: old ndp(8) assumes a positive value for linkmtu. */ 13582ce62dceSSUZUKI Shinsuke bzero(&ND, sizeof(ND)); 13592ce62dceSSUZUKI Shinsuke ND.linkmtu = IN6_LINKMTU(ifp); 13602ce62dceSSUZUKI Shinsuke ND.maxmtu = ND_IFINFO(ifp)->maxmtu; 13612ce62dceSSUZUKI Shinsuke ND.basereachable = ND_IFINFO(ifp)->basereachable; 13622ce62dceSSUZUKI Shinsuke ND.reachable = ND_IFINFO(ifp)->reachable; 13632ce62dceSSUZUKI Shinsuke ND.retrans = ND_IFINFO(ifp)->retrans; 13642ce62dceSSUZUKI Shinsuke ND.flags = ND_IFINFO(ifp)->flags; 13652ce62dceSSUZUKI Shinsuke ND.recalctm = ND_IFINFO(ifp)->recalctm; 13662ce62dceSSUZUKI Shinsuke ND.chlim = ND_IFINFO(ifp)->chlim; 136733841545SHajimu UMEMOTO break; 136882cd038dSYoshinobu Inoue case SIOCGIFINFO_IN6: 13692ce62dceSSUZUKI Shinsuke ND = *ND_IFINFO(ifp); 137082cd038dSYoshinobu Inoue break; 1371b9204379SSUZUKI Shinsuke case SIOCSIFINFO_IN6: 1372b9204379SSUZUKI Shinsuke /* 1373b9204379SSUZUKI Shinsuke * used to change host variables from userland. 1374b9204379SSUZUKI Shinsuke * intented for a use on router to reflect RA configurations. 1375b9204379SSUZUKI Shinsuke */ 1376b9204379SSUZUKI Shinsuke /* 0 means 'unspecified' */ 1377b9204379SSUZUKI Shinsuke if (ND.linkmtu != 0) { 1378b9204379SSUZUKI Shinsuke if (ND.linkmtu < IPV6_MMTU || 1379b9204379SSUZUKI Shinsuke ND.linkmtu > IN6_LINKMTU(ifp)) { 1380b9204379SSUZUKI Shinsuke error = EINVAL; 1381b9204379SSUZUKI Shinsuke break; 1382b9204379SSUZUKI Shinsuke } 1383b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->linkmtu = ND.linkmtu; 1384b9204379SSUZUKI Shinsuke } 1385b9204379SSUZUKI Shinsuke 1386b9204379SSUZUKI Shinsuke if (ND.basereachable != 0) { 1387b9204379SSUZUKI Shinsuke int obasereachable = ND_IFINFO(ifp)->basereachable; 1388b9204379SSUZUKI Shinsuke 1389b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->basereachable = ND.basereachable; 1390b9204379SSUZUKI Shinsuke if (ND.basereachable != obasereachable) 1391b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->reachable = 1392b9204379SSUZUKI Shinsuke ND_COMPUTE_RTIME(ND.basereachable); 1393b9204379SSUZUKI Shinsuke } 1394b9204379SSUZUKI Shinsuke if (ND.retrans != 0) 1395b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->retrans = ND.retrans; 1396b9204379SSUZUKI Shinsuke if (ND.chlim != 0) 1397b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->chlim = ND.chlim; 1398b9204379SSUZUKI Shinsuke /* FALLTHROUGH */ 1399686cdd19SJun-ichiro itojun Hagino case SIOCSIFINFO_FLAGS: 1400a283298cSHiroki Sato { 1401a283298cSHiroki Sato struct ifaddr *ifa; 1402a283298cSHiroki Sato struct in6_ifaddr *ia; 1403a283298cSHiroki Sato 1404a283298cSHiroki Sato if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1405a283298cSHiroki Sato !(ND.flags & ND6_IFF_IFDISABLED)) { 1406a283298cSHiroki Sato /* ifdisabled 1->0 transision */ 1407a283298cSHiroki Sato 1408a283298cSHiroki Sato /* 1409a283298cSHiroki Sato * If the interface is marked as ND6_IFF_IFDISABLED and 1410a283298cSHiroki Sato * has an link-local address with IN6_IFF_DUPLICATED, 1411a283298cSHiroki Sato * do not clear ND6_IFF_IFDISABLED. 1412a283298cSHiroki Sato * See RFC 4862, Section 5.4.5. 1413a283298cSHiroki Sato */ 1414137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1415a283298cSHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1416a283298cSHiroki Sato if (ifa->ifa_addr->sa_family != AF_INET6) 1417a283298cSHiroki Sato continue; 1418a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1419a283298cSHiroki Sato if ((ia->ia6_flags & IN6_IFF_DUPLICATED) && 1420d0bec2c5SHiroki Sato IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 1421a283298cSHiroki Sato break; 1422a283298cSHiroki Sato } 1423137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1424a283298cSHiroki Sato 1425d0bec2c5SHiroki Sato if (ifa != NULL) { 1426d0bec2c5SHiroki Sato /* LLA is duplicated. */ 1427a283298cSHiroki Sato ND.flags |= ND6_IFF_IFDISABLED; 1428a283298cSHiroki Sato log(LOG_ERR, "Cannot enable an interface" 1429a283298cSHiroki Sato " with a link-local address marked" 1430a283298cSHiroki Sato " duplicate.\n"); 1431a283298cSHiroki Sato } else { 1432a283298cSHiroki Sato ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED; 1433154d5f73SHiroki Sato if (ifp->if_flags & IFF_UP) 1434a283298cSHiroki Sato in6_if_up(ifp); 1435a283298cSHiroki Sato } 1436a283298cSHiroki Sato } else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1437a283298cSHiroki Sato (ND.flags & ND6_IFF_IFDISABLED)) { 1438a283298cSHiroki Sato /* ifdisabled 0->1 transision */ 1439a283298cSHiroki Sato /* Mark all IPv6 address as tentative. */ 1440a283298cSHiroki Sato 1441a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED; 1442d0bec2c5SHiroki Sato if ((ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) { 1443137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1444d0bec2c5SHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, 1445d0bec2c5SHiroki Sato ifa_link) { 1446d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1447d0bec2c5SHiroki Sato AF_INET6) 1448a283298cSHiroki Sato continue; 1449a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1450a283298cSHiroki Sato ia->ia6_flags |= IN6_IFF_TENTATIVE; 1451a283298cSHiroki Sato } 1452137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1453a283298cSHiroki Sato } 1454d0bec2c5SHiroki Sato } 1455a283298cSHiroki Sato 1456154d5f73SHiroki Sato if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) { 1457154d5f73SHiroki Sato if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) { 1458a283298cSHiroki Sato /* auto_linklocal 0->1 transision */ 1459a283298cSHiroki Sato 1460a283298cSHiroki Sato /* If no link-local address on ifp, configure */ 1461a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL; 1462a283298cSHiroki Sato in6_ifattach(ifp, NULL); 1463154d5f73SHiroki Sato } else if (!(ND.flags & ND6_IFF_IFDISABLED) && 1464154d5f73SHiroki Sato ifp->if_flags & IFF_UP) { 146577bc4985SHiroki Sato /* 146677bc4985SHiroki Sato * When the IF already has 1467154d5f73SHiroki Sato * ND6_IFF_AUTO_LINKLOCAL, no link-local 1468154d5f73SHiroki Sato * address is assigned, and IFF_UP, try to 1469154d5f73SHiroki Sato * assign one. 147077bc4985SHiroki Sato */ 1471137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1472d0bec2c5SHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, 1473d0bec2c5SHiroki Sato ifa_link) { 1474d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1475d0bec2c5SHiroki Sato AF_INET6) 147677bc4985SHiroki Sato continue; 147777bc4985SHiroki Sato ia = (struct in6_ifaddr *)ifa; 1478d0bec2c5SHiroki Sato if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 147977bc4985SHiroki Sato break; 148077bc4985SHiroki Sato } 1481137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1482d0bec2c5SHiroki Sato if (ifa != NULL) 1483d0bec2c5SHiroki Sato /* No LLA is configured. */ 148477bc4985SHiroki Sato in6_ifattach(ifp, NULL); 1485a283298cSHiroki Sato } 1486a283298cSHiroki Sato } 1487154d5f73SHiroki Sato } 14882ce62dceSSUZUKI Shinsuke ND_IFINFO(ifp)->flags = ND.flags; 1489686cdd19SJun-ichiro itojun Hagino break; 14902ce62dceSSUZUKI Shinsuke #undef ND 1491686cdd19SJun-ichiro itojun Hagino case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1492743eee66SSUZUKI Shinsuke /* sync kernel routing table with the default router list */ 1493743eee66SSUZUKI Shinsuke defrouter_reset(); 1494686cdd19SJun-ichiro itojun Hagino defrouter_select(); 149582cd038dSYoshinobu Inoue break; 149682cd038dSYoshinobu Inoue case SIOCSPFXFLUSH_IN6: 149782cd038dSYoshinobu Inoue { 149882cd038dSYoshinobu Inoue /* flush all the prefix advertised by routers */ 149982cd038dSYoshinobu Inoue struct nd_prefix *pr, *next; 150082cd038dSYoshinobu Inoue 15013b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) { 150233841545SHajimu UMEMOTO struct in6_ifaddr *ia, *ia_next; 150333841545SHajimu UMEMOTO 150433841545SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) 150533841545SHajimu UMEMOTO continue; /* XXX */ 150633841545SHajimu UMEMOTO 150733841545SHajimu UMEMOTO /* do we really have to remove addresses as well? */ 1508d1da0a06SRobert Watson /* XXXRW: in6_ifaddrhead locking. */ 150980af0152SRobert Watson TAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link, 151080af0152SRobert Watson ia_next) { 151133841545SHajimu UMEMOTO if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) 151233841545SHajimu UMEMOTO continue; 151333841545SHajimu UMEMOTO 151433841545SHajimu UMEMOTO if (ia->ia6_ndpr == pr) 151533841545SHajimu UMEMOTO in6_purgeaddr(&ia->ia_ifa); 151633841545SHajimu UMEMOTO } 151782cd038dSYoshinobu Inoue prelist_remove(pr); 151882cd038dSYoshinobu Inoue } 151982cd038dSYoshinobu Inoue break; 152082cd038dSYoshinobu Inoue } 152182cd038dSYoshinobu Inoue case SIOCSRTRFLUSH_IN6: 152282cd038dSYoshinobu Inoue { 152382cd038dSYoshinobu Inoue /* flush all the default routers */ 152482cd038dSYoshinobu Inoue struct nd_defrouter *dr, *next; 152582cd038dSYoshinobu Inoue 1526743eee66SSUZUKI Shinsuke defrouter_reset(); 15273b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, next) { 152882cd038dSYoshinobu Inoue defrtrlist_del(dr); 152982cd038dSYoshinobu Inoue } 1530743eee66SSUZUKI Shinsuke defrouter_select(); 153182cd038dSYoshinobu Inoue break; 153282cd038dSYoshinobu Inoue } 153382cd038dSYoshinobu Inoue case SIOCGNBRINFO_IN6: 153482cd038dSYoshinobu Inoue { 15356e6b3f7cSQing Li struct llentry *ln; 153682cd038dSYoshinobu Inoue struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 153782cd038dSYoshinobu Inoue 1538a1f7e5f8SHajimu UMEMOTO if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0) 1539a1f7e5f8SHajimu UMEMOTO return (error); 154082cd038dSYoshinobu Inoue 154173cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 15426e6b3f7cSQing Li ln = nd6_lookup(&nb_addr, 0, ifp); 154373cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 15446e6b3f7cSQing Li 15456e6b3f7cSQing Li if (ln == NULL) { 154682cd038dSYoshinobu Inoue error = EINVAL; 154782cd038dSYoshinobu Inoue break; 154882cd038dSYoshinobu Inoue } 154982cd038dSYoshinobu Inoue nbi->state = ln->ln_state; 15506e6b3f7cSQing Li nbi->asked = ln->la_asked; 155182cd038dSYoshinobu Inoue nbi->isrouter = ln->ln_router; 15525a041915SHiroki Sato if (ln->la_expire == 0) 15535a041915SHiroki Sato nbi->expire = 0; 15545a041915SHiroki Sato else 15555a041915SHiroki Sato nbi->expire = ln->la_expire + 15565a041915SHiroki Sato (time_second - time_uptime); 15576e6b3f7cSQing Li LLE_RUNLOCK(ln); 155882cd038dSYoshinobu Inoue break; 155982cd038dSYoshinobu Inoue } 1560686cdd19SJun-ichiro itojun Hagino case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1561603724d3SBjoern A. Zeeb ndif->ifindex = V_nd6_defifindex; 1562686cdd19SJun-ichiro itojun Hagino break; 1563686cdd19SJun-ichiro itojun Hagino case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1564686cdd19SJun-ichiro itojun Hagino return (nd6_setdefaultiface(ndif->ifindex)); 156582cd038dSYoshinobu Inoue } 156682cd038dSYoshinobu Inoue return (error); 156782cd038dSYoshinobu Inoue } 156882cd038dSYoshinobu Inoue 156982cd038dSYoshinobu Inoue /* 157082cd038dSYoshinobu Inoue * Create neighbor cache entry and cache link-layer address, 157182cd038dSYoshinobu Inoue * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 15721272577eSXin LI * 15731272577eSXin LI * type - ICMP6 type 15741272577eSXin LI * code - type dependent information 15756e6b3f7cSQing Li * 15766e6b3f7cSQing Li * XXXXX 15776e6b3f7cSQing Li * The caller of this function already acquired the ndp 15786e6b3f7cSQing Li * cache table lock because the cache entry is returned. 157982cd038dSYoshinobu Inoue */ 15806e6b3f7cSQing Li struct llentry * 15811272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr, 15821272577eSXin LI int lladdrlen, int type, int code) 158382cd038dSYoshinobu Inoue { 15845a255516SAlexander V. Chernikov struct llentry *ln = NULL, *ln_tmp; 158582cd038dSYoshinobu Inoue int is_newentry; 158682cd038dSYoshinobu Inoue int do_update; 158782cd038dSYoshinobu Inoue int olladdr; 158882cd038dSYoshinobu Inoue int llchange; 158968352503SBjoern A. Zeeb int flags; 159082cd038dSYoshinobu Inoue int newstate = 0; 15913d3728e9SQing Li uint16_t router = 0; 15926e6b3f7cSQing Li struct sockaddr_in6 sin6; 1593fd14c50bSKip Macy struct mbuf *chain = NULL; 15943d3728e9SQing Li int static_route = 0; 15956e6b3f7cSQing Li 15966e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 159782cd038dSYoshinobu Inoue 159839e19560SBjoern A. Zeeb KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__)); 159939e19560SBjoern A. Zeeb KASSERT(from != NULL, ("%s: from == NULL", __func__)); 160082cd038dSYoshinobu Inoue 160182cd038dSYoshinobu Inoue /* nothing must be updated for unspecified address */ 160282cd038dSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED(from)) 160382cd038dSYoshinobu Inoue return NULL; 160482cd038dSYoshinobu Inoue 160582cd038dSYoshinobu Inoue /* 160682cd038dSYoshinobu Inoue * Validation about ifp->if_addrlen and lladdrlen must be done in 160782cd038dSYoshinobu Inoue * the caller. 160882cd038dSYoshinobu Inoue * 160982cd038dSYoshinobu Inoue * XXX If the link does not have link-layer adderss, what should 161082cd038dSYoshinobu Inoue * we do? (ifp->if_addrlen == 0) 161182cd038dSYoshinobu Inoue * Spec says nothing in sections for RA, RS and NA. There's small 161282cd038dSYoshinobu Inoue * description on it in NS section (RFC 2461 7.2.3). 161382cd038dSYoshinobu Inoue */ 161468352503SBjoern A. Zeeb flags = lladdr ? ND6_EXCLUSIVE : 0; 1615ea0c3776SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 16166e6b3f7cSQing Li ln = nd6_lookup(from, flags, ifp); 1617ea0c3776SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 16185a255516SAlexander V. Chernikov is_newentry = 0; 16196e6b3f7cSQing Li if (ln == NULL) { 162068352503SBjoern A. Zeeb flags |= ND6_EXCLUSIVE; 16215a255516SAlexander V. Chernikov ln = nd6_alloc(from, 0, ifp); 16225a255516SAlexander V. Chernikov if (ln == NULL) 16235a255516SAlexander V. Chernikov return (NULL); 16245a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 16255a255516SAlexander V. Chernikov LLE_WLOCK(ln); 16265a255516SAlexander V. Chernikov /* Prefer any existing lle over newly-created one */ 16275a255516SAlexander V. Chernikov ln_tmp = nd6_lookup(from, ND6_EXCLUSIVE, ifp); 16285a255516SAlexander V. Chernikov if (ln_tmp == NULL) 16295a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 16305a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 16315a255516SAlexander V. Chernikov if (ln_tmp == NULL) 16325a255516SAlexander V. Chernikov /* No existing lle, mark as new entry */ 163382cd038dSYoshinobu Inoue is_newentry = 1; 16345a255516SAlexander V. Chernikov else { 16355a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), ln); 16365a255516SAlexander V. Chernikov ln = ln_tmp; 16375a255516SAlexander V. Chernikov ln_tmp = NULL; 16385a255516SAlexander V. Chernikov } 16395a255516SAlexander V. Chernikov } 164033841545SHajimu UMEMOTO /* do nothing if static ndp is set */ 16415a255516SAlexander V. Chernikov if ((ln->la_flags & LLE_STATIC)) { 16423d3728e9SQing Li static_route = 1; 16436e6b3f7cSQing Li goto done; 16443d3728e9SQing Li } 164582cd038dSYoshinobu Inoue 16466e6b3f7cSQing Li olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0; 164782cd038dSYoshinobu Inoue if (olladdr && lladdr) { 16486e6b3f7cSQing Li llchange = bcmp(lladdr, &ln->ll_addr, 16496e6b3f7cSQing Li ifp->if_addrlen); 165082cd038dSYoshinobu Inoue } else 165182cd038dSYoshinobu Inoue llchange = 0; 165282cd038dSYoshinobu Inoue 165382cd038dSYoshinobu Inoue /* 165482cd038dSYoshinobu Inoue * newentry olladdr lladdr llchange (*=record) 165582cd038dSYoshinobu Inoue * 0 n n -- (1) 165682cd038dSYoshinobu Inoue * 0 y n -- (2) 165782cd038dSYoshinobu Inoue * 0 n y -- (3) * STALE 165882cd038dSYoshinobu Inoue * 0 y y n (4) * 165982cd038dSYoshinobu Inoue * 0 y y y (5) * STALE 166082cd038dSYoshinobu Inoue * 1 -- n -- (6) NOSTATE(= PASSIVE) 166182cd038dSYoshinobu Inoue * 1 -- y -- (7) * STALE 166282cd038dSYoshinobu Inoue */ 166382cd038dSYoshinobu Inoue 166482cd038dSYoshinobu Inoue if (lladdr) { /* (3-5) and (7) */ 166582cd038dSYoshinobu Inoue /* 166682cd038dSYoshinobu Inoue * Record source link-layer address 166782cd038dSYoshinobu Inoue * XXX is it dependent to ifp->if_type? 166882cd038dSYoshinobu Inoue */ 16696e6b3f7cSQing Li bcopy(lladdr, &ln->ll_addr, ifp->if_addrlen); 16706e6b3f7cSQing Li ln->la_flags |= LLE_VALID; 167163a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 167282cd038dSYoshinobu Inoue } 167382cd038dSYoshinobu Inoue 167482cd038dSYoshinobu Inoue if (!is_newentry) { 16752ce62dceSSUZUKI Shinsuke if ((!olladdr && lladdr != NULL) || /* (3) */ 16762ce62dceSSUZUKI Shinsuke (olladdr && lladdr != NULL && llchange)) { /* (5) */ 167782cd038dSYoshinobu Inoue do_update = 1; 167882cd038dSYoshinobu Inoue newstate = ND6_LLINFO_STALE; 167982cd038dSYoshinobu Inoue } else /* (1-2,4) */ 168082cd038dSYoshinobu Inoue do_update = 0; 168182cd038dSYoshinobu Inoue } else { 168282cd038dSYoshinobu Inoue do_update = 1; 16832ce62dceSSUZUKI Shinsuke if (lladdr == NULL) /* (6) */ 168482cd038dSYoshinobu Inoue newstate = ND6_LLINFO_NOSTATE; 168582cd038dSYoshinobu Inoue else /* (7) */ 168682cd038dSYoshinobu Inoue newstate = ND6_LLINFO_STALE; 168782cd038dSYoshinobu Inoue } 168882cd038dSYoshinobu Inoue 168982cd038dSYoshinobu Inoue if (do_update) { 169082cd038dSYoshinobu Inoue /* 169182cd038dSYoshinobu Inoue * Update the state of the neighbor cache. 169282cd038dSYoshinobu Inoue */ 169382cd038dSYoshinobu Inoue ln->ln_state = newstate; 169482cd038dSYoshinobu Inoue 169582cd038dSYoshinobu Inoue if (ln->ln_state == ND6_LLINFO_STALE) { 1696d7968c29SAlexander V. Chernikov if (ln->la_hold != NULL) 1697d7968c29SAlexander V. Chernikov nd6_grab_holdchain(ln, &chain, &sin6); 169882cd038dSYoshinobu Inoue } else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) { 169982cd038dSYoshinobu Inoue /* probe right away */ 17006e6b3f7cSQing Li nd6_llinfo_settimer_locked((void *)ln, 0); 170182cd038dSYoshinobu Inoue } 170282cd038dSYoshinobu Inoue } 170382cd038dSYoshinobu Inoue 170482cd038dSYoshinobu Inoue /* 170582cd038dSYoshinobu Inoue * ICMP6 type dependent behavior. 170682cd038dSYoshinobu Inoue * 170782cd038dSYoshinobu Inoue * NS: clear IsRouter if new entry 170882cd038dSYoshinobu Inoue * RS: clear IsRouter 170982cd038dSYoshinobu Inoue * RA: set IsRouter if there's lladdr 171082cd038dSYoshinobu Inoue * redir: clear IsRouter if new entry 171182cd038dSYoshinobu Inoue * 171282cd038dSYoshinobu Inoue * RA case, (1): 171382cd038dSYoshinobu Inoue * The spec says that we must set IsRouter in the following cases: 171482cd038dSYoshinobu Inoue * - If lladdr exist, set IsRouter. This means (1-5). 171582cd038dSYoshinobu Inoue * - If it is old entry (!newentry), set IsRouter. This means (7). 171682cd038dSYoshinobu Inoue * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 171782cd038dSYoshinobu Inoue * A quetion arises for (1) case. (1) case has no lladdr in the 171882cd038dSYoshinobu Inoue * neighbor cache, this is similar to (6). 171982cd038dSYoshinobu Inoue * This case is rare but we figured that we MUST NOT set IsRouter. 172082cd038dSYoshinobu Inoue * 172182cd038dSYoshinobu Inoue * newentry olladdr lladdr llchange NS RS RA redir 172282cd038dSYoshinobu Inoue * D R 172382cd038dSYoshinobu Inoue * 0 n n -- (1) c ? s 172482cd038dSYoshinobu Inoue * 0 y n -- (2) c s s 172582cd038dSYoshinobu Inoue * 0 n y -- (3) c s s 172682cd038dSYoshinobu Inoue * 0 y y n (4) c s s 172782cd038dSYoshinobu Inoue * 0 y y y (5) c s s 172882cd038dSYoshinobu Inoue * 1 -- n -- (6) c c c s 172982cd038dSYoshinobu Inoue * 1 -- y -- (7) c c s c s 173082cd038dSYoshinobu Inoue * 173182cd038dSYoshinobu Inoue * (c=clear s=set) 173282cd038dSYoshinobu Inoue */ 173382cd038dSYoshinobu Inoue switch (type & 0xff) { 173482cd038dSYoshinobu Inoue case ND_NEIGHBOR_SOLICIT: 173582cd038dSYoshinobu Inoue /* 173682cd038dSYoshinobu Inoue * New entry must have is_router flag cleared. 173782cd038dSYoshinobu Inoue */ 173882cd038dSYoshinobu Inoue if (is_newentry) /* (6-7) */ 173982cd038dSYoshinobu Inoue ln->ln_router = 0; 174082cd038dSYoshinobu Inoue break; 174182cd038dSYoshinobu Inoue case ND_REDIRECT: 174282cd038dSYoshinobu Inoue /* 174382cd038dSYoshinobu Inoue * If the icmp is a redirect to a better router, always set the 174482cd038dSYoshinobu Inoue * is_router flag. Otherwise, if the entry is newly created, 174582cd038dSYoshinobu Inoue * clear the flag. [RFC 2461, sec 8.3] 174682cd038dSYoshinobu Inoue */ 174782cd038dSYoshinobu Inoue if (code == ND_REDIRECT_ROUTER) 174882cd038dSYoshinobu Inoue ln->ln_router = 1; 174982cd038dSYoshinobu Inoue else if (is_newentry) /* (6-7) */ 175082cd038dSYoshinobu Inoue ln->ln_router = 0; 175182cd038dSYoshinobu Inoue break; 175282cd038dSYoshinobu Inoue case ND_ROUTER_SOLICIT: 175382cd038dSYoshinobu Inoue /* 175482cd038dSYoshinobu Inoue * is_router flag must always be cleared. 175582cd038dSYoshinobu Inoue */ 175682cd038dSYoshinobu Inoue ln->ln_router = 0; 175782cd038dSYoshinobu Inoue break; 175882cd038dSYoshinobu Inoue case ND_ROUTER_ADVERT: 175982cd038dSYoshinobu Inoue /* 176082cd038dSYoshinobu Inoue * Mark an entry with lladdr as a router. 176182cd038dSYoshinobu Inoue */ 176207eb2995SHajimu UMEMOTO if ((!is_newentry && (olladdr || lladdr)) || /* (2-5) */ 176307eb2995SHajimu UMEMOTO (is_newentry && lladdr)) { /* (7) */ 176482cd038dSYoshinobu Inoue ln->ln_router = 1; 176582cd038dSYoshinobu Inoue } 176682cd038dSYoshinobu Inoue break; 176782cd038dSYoshinobu Inoue } 176882cd038dSYoshinobu Inoue 176923ee1bfaSKip Macy if (ln != NULL) { 17703d3728e9SQing Li static_route = (ln->la_flags & LLE_STATIC); 1771c2b3a02bSKip Macy router = ln->ln_router; 1772c2b3a02bSKip Macy 17736e6b3f7cSQing Li if (flags & ND6_EXCLUSIVE) 17746e6b3f7cSQing Li LLE_WUNLOCK(ln); 17756e6b3f7cSQing Li else 17766e6b3f7cSQing Li LLE_RUNLOCK(ln); 1777c2b3a02bSKip Macy if (static_route) 17786e6b3f7cSQing Li ln = NULL; 17796e6b3f7cSQing Li } 1780d7968c29SAlexander V. Chernikov if (chain != NULL) 1781d7968c29SAlexander V. Chernikov nd6_flush_holdchain(ifp, ifp, chain, &sin6); 17826e6b3f7cSQing Li 1783554bf4aaSHajimu UMEMOTO /* 1784554bf4aaSHajimu UMEMOTO * When the link-layer address of a router changes, select the 1785554bf4aaSHajimu UMEMOTO * best router again. In particular, when the neighbor entry is newly 1786554bf4aaSHajimu UMEMOTO * created, it might affect the selection policy. 1787554bf4aaSHajimu UMEMOTO * Question: can we restrict the first condition to the "is_newentry" 1788554bf4aaSHajimu UMEMOTO * case? 1789554bf4aaSHajimu UMEMOTO * XXX: when we hear an RA from a new router with the link-layer 1790554bf4aaSHajimu UMEMOTO * address option, defrouter_select() is called twice, since 1791554bf4aaSHajimu UMEMOTO * defrtrlist_update called the function as well. However, I believe 1792554bf4aaSHajimu UMEMOTO * we can compromise the overhead, since it only happens the first 1793554bf4aaSHajimu UMEMOTO * time. 1794554bf4aaSHajimu UMEMOTO * XXX: although defrouter_select() should not have a bad effect 1795554bf4aaSHajimu UMEMOTO * for those are not autoconfigured hosts, we explicitly avoid such 1796554bf4aaSHajimu UMEMOTO * cases for safety. 1797554bf4aaSHajimu UMEMOTO */ 1798e7fa8d0aSHiroki Sato if (do_update && router && 1799a283298cSHiroki Sato ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 18006e6b3f7cSQing Li /* 18016e6b3f7cSQing Li * guaranteed recursion 18026e6b3f7cSQing Li */ 1803554bf4aaSHajimu UMEMOTO defrouter_select(); 18046e6b3f7cSQing Li } 1805554bf4aaSHajimu UMEMOTO 18066e6b3f7cSQing Li return (ln); 18076e6b3f7cSQing Li done: 1808aba53ef0SKip Macy if (ln != NULL) { 18096e6b3f7cSQing Li if (flags & ND6_EXCLUSIVE) 18106e6b3f7cSQing Li LLE_WUNLOCK(ln); 18116e6b3f7cSQing Li else 18126e6b3f7cSQing Li LLE_RUNLOCK(ln); 18133d3728e9SQing Li if (static_route) 18146e6b3f7cSQing Li ln = NULL; 18156e6b3f7cSQing Li } 18166e6b3f7cSQing Li return (ln); 181782cd038dSYoshinobu Inoue } 181882cd038dSYoshinobu Inoue 181982cd038dSYoshinobu Inoue static void 18208b615593SMarko Zec nd6_slowtimo(void *arg) 182182cd038dSYoshinobu Inoue { 18228b615593SMarko Zec CURVNET_SET((struct vnet *) arg); 182333841545SHajimu UMEMOTO struct nd_ifinfo *nd6if; 182431b1bfe1SHajimu UMEMOTO struct ifnet *ifp; 182582cd038dSYoshinobu Inoue 1826603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 1827f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 182877dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 1829e6abaf91SGleb Smirnoff TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 18300de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 18310de0dd9bSHiroki Sato continue; 183231b1bfe1SHajimu UMEMOTO nd6if = ND_IFINFO(ifp); 183382cd038dSYoshinobu Inoue if (nd6if->basereachable && /* already initialized */ 183482cd038dSYoshinobu Inoue (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 183582cd038dSYoshinobu Inoue /* 183682cd038dSYoshinobu Inoue * Since reachable time rarely changes by router 183782cd038dSYoshinobu Inoue * advertisements, we SHOULD insure that a new random 183882cd038dSYoshinobu Inoue * value gets recomputed at least once every few hours. 183982cd038dSYoshinobu Inoue * (RFC 2461, 6.3.4) 184082cd038dSYoshinobu Inoue */ 1841603724d3SBjoern A. Zeeb nd6if->recalctm = V_nd6_recalc_reachtm_interval; 184282cd038dSYoshinobu Inoue nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 184382cd038dSYoshinobu Inoue } 184482cd038dSYoshinobu Inoue } 184577dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 18468b615593SMarko Zec CURVNET_RESTORE(); 184782cd038dSYoshinobu Inoue } 184882cd038dSYoshinobu Inoue 1849d7968c29SAlexander V. Chernikov void 1850d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain, 1851d7968c29SAlexander V. Chernikov struct sockaddr_in6 *sin6) 1852d7968c29SAlexander V. Chernikov { 1853d7968c29SAlexander V. Chernikov 1854d7968c29SAlexander V. Chernikov LLE_WLOCK_ASSERT(ln); 1855d7968c29SAlexander V. Chernikov 1856d7968c29SAlexander V. Chernikov *chain = ln->la_hold; 1857d7968c29SAlexander V. Chernikov ln->la_hold = NULL; 1858314294deSAlexander V. Chernikov lltable_fill_sa_entry(ln, (struct sockaddr *)sin6); 1859d7968c29SAlexander V. Chernikov 1860d7968c29SAlexander V. Chernikov if (ln->ln_state == ND6_LLINFO_STALE) { 1861d7968c29SAlexander V. Chernikov 1862d7968c29SAlexander V. Chernikov /* 1863d7968c29SAlexander V. Chernikov * The first time we send a packet to a 1864d7968c29SAlexander V. Chernikov * neighbor whose entry is STALE, we have 1865d7968c29SAlexander V. Chernikov * to change the state to DELAY and a sets 1866d7968c29SAlexander V. Chernikov * a timer to expire in DELAY_FIRST_PROBE_TIME 1867d7968c29SAlexander V. Chernikov * seconds to ensure do neighbor unreachability 1868d7968c29SAlexander V. Chernikov * detection on expiration. 1869d7968c29SAlexander V. Chernikov * (RFC 2461 7.3.3) 1870d7968c29SAlexander V. Chernikov */ 1871d7968c29SAlexander V. Chernikov ln->la_asked = 0; 1872d7968c29SAlexander V. Chernikov ln->ln_state = ND6_LLINFO_DELAY; 1873d7968c29SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, (long)V_nd6_delay * hz); 1874d7968c29SAlexander V. Chernikov } 1875d7968c29SAlexander V. Chernikov } 1876d7968c29SAlexander V. Chernikov 1877d7968c29SAlexander V. Chernikov static int 1878d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m, 1879d7968c29SAlexander V. Chernikov struct sockaddr_in6 *dst) 1880d7968c29SAlexander V. Chernikov { 1881d7968c29SAlexander V. Chernikov int error; 1882d7968c29SAlexander V. Chernikov int ip6len; 1883d7968c29SAlexander V. Chernikov struct ip6_hdr *ip6; 1884d7968c29SAlexander V. Chernikov struct m_tag *mtag; 1885d7968c29SAlexander V. Chernikov 1886d7968c29SAlexander V. Chernikov #ifdef MAC 1887d7968c29SAlexander V. Chernikov mac_netinet6_nd6_send(ifp, m); 1888d7968c29SAlexander V. Chernikov #endif 1889d7968c29SAlexander V. Chernikov 1890d7968c29SAlexander V. Chernikov /* 1891d7968c29SAlexander V. Chernikov * If called from nd6_ns_output() (NS), nd6_na_output() (NA), 1892d7968c29SAlexander V. Chernikov * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA 1893d7968c29SAlexander V. Chernikov * as handled by rtsol and rtadvd), mbufs will be tagged for SeND 1894d7968c29SAlexander V. Chernikov * to be diverted to user space. When re-injected into the kernel, 1895d7968c29SAlexander V. Chernikov * send_output() will directly dispatch them to the outgoing interface. 1896d7968c29SAlexander V. Chernikov */ 1897d7968c29SAlexander V. Chernikov if (send_sendso_input_hook != NULL) { 1898d7968c29SAlexander V. Chernikov mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL); 1899d7968c29SAlexander V. Chernikov if (mtag != NULL) { 1900d7968c29SAlexander V. Chernikov ip6 = mtod(m, struct ip6_hdr *); 1901d7968c29SAlexander V. Chernikov ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 1902d7968c29SAlexander V. Chernikov /* Use the SEND socket */ 1903d7968c29SAlexander V. Chernikov error = send_sendso_input_hook(m, ifp, SND_OUT, 1904d7968c29SAlexander V. Chernikov ip6len); 1905d7968c29SAlexander V. Chernikov /* -1 == no app on SEND socket */ 1906d7968c29SAlexander V. Chernikov if (error == 0 || error != -1) 1907d7968c29SAlexander V. Chernikov return (error); 1908d7968c29SAlexander V. Chernikov } 1909d7968c29SAlexander V. Chernikov } 1910d7968c29SAlexander V. Chernikov 1911d7968c29SAlexander V. Chernikov m_clrprotoflags(m); /* Avoid confusing lower layers. */ 1912d7968c29SAlexander V. Chernikov IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL, 1913d7968c29SAlexander V. Chernikov mtod(m, struct ip6_hdr *)); 1914d7968c29SAlexander V. Chernikov 1915d7968c29SAlexander V. Chernikov if ((ifp->if_flags & IFF_LOOPBACK) == 0) 1916d7968c29SAlexander V. Chernikov origifp = ifp; 1917d7968c29SAlexander V. Chernikov 1918d7968c29SAlexander V. Chernikov error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, NULL); 1919d7968c29SAlexander V. Chernikov return (error); 1920d7968c29SAlexander V. Chernikov } 1921d7968c29SAlexander V. Chernikov 1922f6990c4eSAlexander V. Chernikov /* 1923f6990c4eSAlexander V. Chernikov * IPv6 packet output - light version. 1924f6990c4eSAlexander V. Chernikov * Checks if destination LLE exists and is in proper state 1925f6990c4eSAlexander V. Chernikov * (e.g no modification required). If not true, fall back to 1926f6990c4eSAlexander V. Chernikov * "heavy" version. 1927f6990c4eSAlexander V. Chernikov */ 192882cd038dSYoshinobu Inoue int 1929f6990c4eSAlexander V. Chernikov nd6_output(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m, 19301272577eSXin LI struct sockaddr_in6 *dst, struct rtentry *rt0) 193182cd038dSYoshinobu Inoue { 1932f6990c4eSAlexander V. Chernikov struct llentry *ln = NULL; 19336e6b3f7cSQing Li 1934f6990c4eSAlexander V. Chernikov /* discard the packet if IPv6 operation is disabled on the interface */ 1935f6990c4eSAlexander V. Chernikov if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) { 1936f6990c4eSAlexander V. Chernikov m_freem(m); 1937f6990c4eSAlexander V. Chernikov return (ENETDOWN); /* better error? */ 1938f6990c4eSAlexander V. Chernikov } 1939f6990c4eSAlexander V. Chernikov 1940f6990c4eSAlexander V. Chernikov if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr)) 1941f6990c4eSAlexander V. Chernikov goto sendpkt; 1942f6990c4eSAlexander V. Chernikov 1943f6990c4eSAlexander V. Chernikov if (nd6_need_cache(ifp) == 0) 1944f6990c4eSAlexander V. Chernikov goto sendpkt; 1945f6990c4eSAlexander V. Chernikov 1946f6990c4eSAlexander V. Chernikov IF_AFDATA_RLOCK(ifp); 1947f6990c4eSAlexander V. Chernikov ln = nd6_lookup(&dst->sin6_addr, 0, ifp); 1948f6990c4eSAlexander V. Chernikov IF_AFDATA_RUNLOCK(ifp); 1949f6990c4eSAlexander V. Chernikov 1950f6990c4eSAlexander V. Chernikov /* 1951f6990c4eSAlexander V. Chernikov * Perform fast path for the following cases: 1952f6990c4eSAlexander V. Chernikov * 1) lle state is REACHABLE 1953f6990c4eSAlexander V. Chernikov * 2) lle state is DELAY (NS message sentNS message sent) 1954f6990c4eSAlexander V. Chernikov * 1955f6990c4eSAlexander V. Chernikov * Every other case involves lle modification, so we handle 1956f6990c4eSAlexander V. Chernikov * them separately. 1957f6990c4eSAlexander V. Chernikov */ 1958f6990c4eSAlexander V. Chernikov if (ln == NULL || (ln->ln_state != ND6_LLINFO_REACHABLE && 1959f6990c4eSAlexander V. Chernikov ln->ln_state != ND6_LLINFO_DELAY)) { 1960f6990c4eSAlexander V. Chernikov /* Fall back to slow processing path */ 1961f6990c4eSAlexander V. Chernikov if (ln != NULL) 1962f6990c4eSAlexander V. Chernikov LLE_RUNLOCK(ln); 1963d7968c29SAlexander V. Chernikov return (nd6_output_lle(ifp, origifp, m, dst)); 1964f6990c4eSAlexander V. Chernikov } 1965f6990c4eSAlexander V. Chernikov 1966f6990c4eSAlexander V. Chernikov sendpkt: 1967f6990c4eSAlexander V. Chernikov if (ln != NULL) 1968f6990c4eSAlexander V. Chernikov LLE_RUNLOCK(ln); 1969f6990c4eSAlexander V. Chernikov 1970d7968c29SAlexander V. Chernikov return (nd6_output_ifp(ifp, origifp, m, dst)); 19716e6b3f7cSQing Li } 19726e6b3f7cSQing Li 19736e6b3f7cSQing Li 19746e6b3f7cSQing Li /* 1975f6990c4eSAlexander V. Chernikov * Output IPv6 packet - heavy version. 1976f6990c4eSAlexander V. Chernikov * Function assume that either 1977f6990c4eSAlexander V. Chernikov * 1) destination LLE does not exist, is invalid or stale, so 1978f6990c4eSAlexander V. Chernikov * ND6_EXCLUSIVE lock needs to be acquired 1979f6990c4eSAlexander V. Chernikov * 2) destination lle is provided (with ND6_EXCLUSIVE lock), 1980f6990c4eSAlexander V. Chernikov * in that case packets are queued in &chain. 19816e6b3f7cSQing Li * 19826e6b3f7cSQing Li */ 1983d7968c29SAlexander V. Chernikov static int 1984f6990c4eSAlexander V. Chernikov nd6_output_lle(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m, 1985d7968c29SAlexander V. Chernikov struct sockaddr_in6 *dst) 19866e6b3f7cSQing Li { 19875a255516SAlexander V. Chernikov struct llentry *lle = NULL, *lle_tmp; 198882cd038dSYoshinobu Inoue 19899dffa6a3SAlexander V. Chernikov KASSERT(m != NULL, ("NULL mbuf, nothing to send")); 19909dffa6a3SAlexander V. Chernikov /* discard the packet if IPv6 operation is disabled on the interface */ 19919dffa6a3SAlexander V. Chernikov if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) { 19929dffa6a3SAlexander V. Chernikov m_freem(m); 19939dffa6a3SAlexander V. Chernikov return (ENETDOWN); /* better error? */ 19949dffa6a3SAlexander V. Chernikov } 19959dffa6a3SAlexander V. Chernikov 199682cd038dSYoshinobu Inoue if (IN6_IS_ADDR_MULTICAST(&dst->sin6_addr)) 199782cd038dSYoshinobu Inoue goto sendpkt; 199882cd038dSYoshinobu Inoue 199933841545SHajimu UMEMOTO if (nd6_need_cache(ifp) == 0) 200082cd038dSYoshinobu Inoue goto sendpkt; 200182cd038dSYoshinobu Inoue 200282cd038dSYoshinobu Inoue /* 200382cd038dSYoshinobu Inoue * Address resolution or Neighbor Unreachability Detection 200482cd038dSYoshinobu Inoue * for the next hop. 200582cd038dSYoshinobu Inoue * At this point, the destination of the packet must be a unicast 200682cd038dSYoshinobu Inoue * or an anycast address(i.e. not a multicast). 200782cd038dSYoshinobu Inoue */ 2008f6990c4eSAlexander V. Chernikov if (lle == NULL) { 2009c445d252SAdrian Chadd IF_AFDATA_RLOCK(ifp); 2010f6990c4eSAlexander V. Chernikov lle = nd6_lookup(&dst->sin6_addr, ND6_EXCLUSIVE, ifp); 2011c445d252SAdrian Chadd IF_AFDATA_RUNLOCK(ifp); 2012f6990c4eSAlexander V. Chernikov if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp)) { 2013686cdd19SJun-ichiro itojun Hagino /* 2014686cdd19SJun-ichiro itojun Hagino * Since nd6_is_addr_neighbor() internally calls nd6_lookup(), 2015686cdd19SJun-ichiro itojun Hagino * the condition below is not very efficient. But we believe 2016686cdd19SJun-ichiro itojun Hagino * it is tolerable, because this should be a rare case. 2017686cdd19SJun-ichiro itojun Hagino */ 20185a255516SAlexander V. Chernikov lle = nd6_alloc(&dst->sin6_addr, 0, ifp); 2019f6990c4eSAlexander V. Chernikov if (lle == NULL) { 20201d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 2021686cdd19SJun-ichiro itojun Hagino log(LOG_DEBUG, 2022686cdd19SJun-ichiro itojun Hagino "nd6_output: can't allocate llinfo for %s " 2023bbd8aebaSQing Li "(ln=%p)\n", 2024f6990c4eSAlexander V. Chernikov ip6_sprintf(ip6buf, &dst->sin6_addr), lle); 20259dffa6a3SAlexander V. Chernikov m_freem(m); 20269dffa6a3SAlexander V. Chernikov return (ENOBUFS); 202782cd038dSYoshinobu Inoue } 20285a255516SAlexander V. Chernikov lle->ln_state = ND6_LLINFO_NOSTATE; 20295a255516SAlexander V. Chernikov 20305a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 20315a255516SAlexander V. Chernikov LLE_WLOCK(lle); 20325a255516SAlexander V. Chernikov /* Prefer any existing entry over newly-created one */ 20335a255516SAlexander V. Chernikov lle_tmp = nd6_lookup(&dst->sin6_addr, ND6_EXCLUSIVE, ifp); 20345a255516SAlexander V. Chernikov if (lle_tmp == NULL) 20355a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), lle); 20365a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 20375a255516SAlexander V. Chernikov if (lle_tmp != NULL) { 20385a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), lle); 20395a255516SAlexander V. Chernikov lle = lle_tmp; 20405a255516SAlexander V. Chernikov lle_tmp = NULL; 20415a255516SAlexander V. Chernikov } 20425a255516SAlexander V. Chernikov } 20435a255516SAlexander V. Chernikov } 20445a255516SAlexander V. Chernikov if (lle == NULL) { 20455a255516SAlexander V. Chernikov if ((ifp->if_flags & IFF_POINTOPOINT) == 0 && 20465a255516SAlexander V. Chernikov !(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) { 20475a255516SAlexander V. Chernikov m_freem(m); 20485a255516SAlexander V. Chernikov return (ENOBUFS); 20495a255516SAlexander V. Chernikov } 2050686cdd19SJun-ichiro itojun Hagino goto sendpkt; /* send anyway */ 2051686cdd19SJun-ichiro itojun Hagino } 2052686cdd19SJun-ichiro itojun Hagino 2053f6990c4eSAlexander V. Chernikov LLE_WLOCK_ASSERT(lle); 2054f6990c4eSAlexander V. Chernikov 2055686cdd19SJun-ichiro itojun Hagino /* We don't have to do link-layer address resolution on a p2p link. */ 2056686cdd19SJun-ichiro itojun Hagino if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 2057f6990c4eSAlexander V. Chernikov lle->ln_state < ND6_LLINFO_REACHABLE) { 2058f6990c4eSAlexander V. Chernikov lle->ln_state = ND6_LLINFO_STALE; 2059f6990c4eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, (long)V_nd6_gctimer * hz); 206033841545SHajimu UMEMOTO } 206182cd038dSYoshinobu Inoue 206282cd038dSYoshinobu Inoue /* 206382cd038dSYoshinobu Inoue * The first time we send a packet to a neighbor whose entry is 206482cd038dSYoshinobu Inoue * STALE, we have to change the state to DELAY and a sets a timer to 206582cd038dSYoshinobu Inoue * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 206682cd038dSYoshinobu Inoue * neighbor unreachability detection on expiration. 206782cd038dSYoshinobu Inoue * (RFC 2461 7.3.3) 206882cd038dSYoshinobu Inoue */ 2069f6990c4eSAlexander V. Chernikov if (lle->ln_state == ND6_LLINFO_STALE) { 2070f6990c4eSAlexander V. Chernikov lle->la_asked = 0; 2071f6990c4eSAlexander V. Chernikov lle->ln_state = ND6_LLINFO_DELAY; 2072f6990c4eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, (long)V_nd6_delay * hz); 207382cd038dSYoshinobu Inoue } 207482cd038dSYoshinobu Inoue 207582cd038dSYoshinobu Inoue /* 207682cd038dSYoshinobu Inoue * If the neighbor cache entry has a state other than INCOMPLETE 207788ff5695SSUZUKI Shinsuke * (i.e. its link-layer address is already resolved), just 207882cd038dSYoshinobu Inoue * send the packet. 207982cd038dSYoshinobu Inoue */ 2080f6990c4eSAlexander V. Chernikov if (lle->ln_state > ND6_LLINFO_INCOMPLETE) 208182cd038dSYoshinobu Inoue goto sendpkt; 208282cd038dSYoshinobu Inoue 208382cd038dSYoshinobu Inoue /* 208482cd038dSYoshinobu Inoue * There is a neighbor cache entry, but no ethernet address 2085743eee66SSUZUKI Shinsuke * response yet. Append this latest packet to the end of the 2086743eee66SSUZUKI Shinsuke * packet queue in the mbuf, unless the number of the packet 2087743eee66SSUZUKI Shinsuke * does not exceed nd6_maxqueuelen. When it exceeds nd6_maxqueuelen, 2088743eee66SSUZUKI Shinsuke * the oldest packet in the queue will be removed. 208982cd038dSYoshinobu Inoue */ 2090f6990c4eSAlexander V. Chernikov if (lle->ln_state == ND6_LLINFO_NOSTATE) 2091f6990c4eSAlexander V. Chernikov lle->ln_state = ND6_LLINFO_INCOMPLETE; 20926e6b3f7cSQing Li 2093f6990c4eSAlexander V. Chernikov if (lle->la_hold != NULL) { 2094743eee66SSUZUKI Shinsuke struct mbuf *m_hold; 2095743eee66SSUZUKI Shinsuke int i; 2096743eee66SSUZUKI Shinsuke 2097743eee66SSUZUKI Shinsuke i = 0; 2098f6990c4eSAlexander V. Chernikov for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){ 2099743eee66SSUZUKI Shinsuke i++; 2100743eee66SSUZUKI Shinsuke if (m_hold->m_nextpkt == NULL) { 2101743eee66SSUZUKI Shinsuke m_hold->m_nextpkt = m; 2102743eee66SSUZUKI Shinsuke break; 210382cd038dSYoshinobu Inoue } 210482cd038dSYoshinobu Inoue } 2105603724d3SBjoern A. Zeeb while (i >= V_nd6_maxqueuelen) { 2106f6990c4eSAlexander V. Chernikov m_hold = lle->la_hold; 2107f6990c4eSAlexander V. Chernikov lle->la_hold = lle->la_hold->m_nextpkt; 210831d4137bSSUZUKI Shinsuke m_freem(m_hold); 2109743eee66SSUZUKI Shinsuke i--; 2110743eee66SSUZUKI Shinsuke } 2111743eee66SSUZUKI Shinsuke } else { 2112f6990c4eSAlexander V. Chernikov lle->la_hold = m; 21136e6b3f7cSQing Li } 2114743eee66SSUZUKI Shinsuke 2115743eee66SSUZUKI Shinsuke /* 2116743eee66SSUZUKI Shinsuke * If there has been no NS for the neighbor after entering the 2117743eee66SSUZUKI Shinsuke * INCOMPLETE state, send the first solicitation. 2118743eee66SSUZUKI Shinsuke */ 2119f6990c4eSAlexander V. Chernikov if (!ND6_LLINFO_PERMANENT(lle) && lle->la_asked == 0) { 212026deb882SAlexander V. Chernikov struct in6_addr src, *psrc; 2121f6990c4eSAlexander V. Chernikov lle->la_asked++; 21226e6b3f7cSQing Li 2123f6990c4eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, 2124743eee66SSUZUKI Shinsuke (long)ND_IFINFO(ifp)->retrans * hz / 1000); 212526deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(lle, &src); 2126f6990c4eSAlexander V. Chernikov LLE_WUNLOCK(lle); 212726deb882SAlexander V. Chernikov nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL); 2128d7968c29SAlexander V. Chernikov } else { 2129d7968c29SAlexander V. Chernikov /* We did the lookup so we need to do the unlock here. */ 2130f6990c4eSAlexander V. Chernikov LLE_WUNLOCK(lle); 2131743eee66SSUZUKI Shinsuke } 2132e6950476SBjoern A. Zeeb 213382cd038dSYoshinobu Inoue return (0); 213482cd038dSYoshinobu Inoue 213582cd038dSYoshinobu Inoue sendpkt: 2136d7968c29SAlexander V. Chernikov if (lle != NULL) 2137f6990c4eSAlexander V. Chernikov LLE_WUNLOCK(lle); 21385b27b045SSUZUKI Shinsuke 2139d7968c29SAlexander V. Chernikov return (nd6_output_ifp(ifp, origifp, m, dst)); 214082cd038dSYoshinobu Inoue } 214182cd038dSYoshinobu Inoue 21426e6b3f7cSQing Li 21436e6b3f7cSQing Li int 2144d7968c29SAlexander V. Chernikov nd6_flush_holdchain(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *chain, 21459c9bde01SAlexander V. Chernikov struct sockaddr_in6 *dst) 21466e6b3f7cSQing Li { 21476e6b3f7cSQing Li struct mbuf *m, *m_head; 21486e6b3f7cSQing Li struct ifnet *outifp; 21496e6b3f7cSQing Li int error = 0; 21506e6b3f7cSQing Li 21516e6b3f7cSQing Li m_head = chain; 21526e6b3f7cSQing Li if ((ifp->if_flags & IFF_LOOPBACK) != 0) 21536e6b3f7cSQing Li outifp = origifp; 21546e6b3f7cSQing Li else 21556e6b3f7cSQing Li outifp = ifp; 21566e6b3f7cSQing Li 21576e6b3f7cSQing Li while (m_head) { 21586e6b3f7cSQing Li m = m_head; 21596e6b3f7cSQing Li m_head = m_head->m_nextpkt; 2160d7968c29SAlexander V. Chernikov error = nd6_output_ifp(ifp, origifp, m, dst); 21616e6b3f7cSQing Li } 21626e6b3f7cSQing Li 21636e6b3f7cSQing Li /* 21646e6b3f7cSQing Li * XXX 21656e6b3f7cSQing Li * note that intermediate errors are blindly ignored - but this is 21666e6b3f7cSQing Li * the same convention as used with nd6_output when called by 21676e6b3f7cSQing Li * nd6_cache_lladdr 21686e6b3f7cSQing Li */ 21696e6b3f7cSQing Li return (error); 21706e6b3f7cSQing Li } 21716e6b3f7cSQing Li 21726e6b3f7cSQing Li 217382cd038dSYoshinobu Inoue int 21741272577eSXin LI nd6_need_cache(struct ifnet *ifp) 217533841545SHajimu UMEMOTO { 217633841545SHajimu UMEMOTO /* 217733841545SHajimu UMEMOTO * XXX: we currently do not make neighbor cache on any interface 217833841545SHajimu UMEMOTO * other than ARCnet, Ethernet, FDDI and GIF. 217933841545SHajimu UMEMOTO * 218033841545SHajimu UMEMOTO * RFC2893 says: 218133841545SHajimu UMEMOTO * - unidirectional tunnels needs no ND 218233841545SHajimu UMEMOTO */ 218333841545SHajimu UMEMOTO switch (ifp->if_type) { 218433841545SHajimu UMEMOTO case IFT_ARCNET: 218533841545SHajimu UMEMOTO case IFT_ETHER: 218633841545SHajimu UMEMOTO case IFT_FDDI: 218733841545SHajimu UMEMOTO case IFT_IEEE1394: 218805b6760dSMunechika SUMIKAWA case IFT_L2VLAN: 218933841545SHajimu UMEMOTO case IFT_IEEE80211: 2190e4cd31ddSJeff Roberson case IFT_INFINIBAND: 219159280079SAndrew Thompson case IFT_BRIDGE: 2192c57086ceSHajimu UMEMOTO case IFT_PROPVIRTUAL: 219333841545SHajimu UMEMOTO return (1); 219433841545SHajimu UMEMOTO default: 219533841545SHajimu UMEMOTO return (0); 219633841545SHajimu UMEMOTO } 219733841545SHajimu UMEMOTO } 219833841545SHajimu UMEMOTO 21996e6b3f7cSQing Li /* 2200f6b84910SAlexander V. Chernikov * Add pernament ND6 link-layer record for given 2201f6b84910SAlexander V. Chernikov * interface address. 2202f6b84910SAlexander V. Chernikov * 2203f6b84910SAlexander V. Chernikov * Very similar to IPv4 arp_ifinit(), but: 2204f6b84910SAlexander V. Chernikov * 1) IPv6 DAD is performed in different place 2205f6b84910SAlexander V. Chernikov * 2) It is called by IPv6 protocol stack in contrast to 2206f6b84910SAlexander V. Chernikov * arp_ifinit() which is typically called in SIOCSIFADDR 2207f6b84910SAlexander V. Chernikov * driver ioctl handler. 2208f6b84910SAlexander V. Chernikov * 2209f6b84910SAlexander V. Chernikov */ 2210f6b84910SAlexander V. Chernikov int 2211f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia) 2212f6b84910SAlexander V. Chernikov { 2213f6b84910SAlexander V. Chernikov struct ifnet *ifp; 22145a255516SAlexander V. Chernikov struct llentry *ln, *ln_tmp; 22155a255516SAlexander V. Chernikov struct sockaddr *dst; 2216f6b84910SAlexander V. Chernikov 2217f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2218af6209a1SAndrey V. Elsukov if (nd6_need_cache(ifp) == 0) 2219af6209a1SAndrey V. Elsukov return (0); 22205a255516SAlexander V. Chernikov 2221f6b84910SAlexander V. Chernikov ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 22225a255516SAlexander V. Chernikov dst = (struct sockaddr *)&ia->ia_addr; 22235a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst); 22245a255516SAlexander V. Chernikov if (ln == NULL) 22255a255516SAlexander V. Chernikov return (ENOBUFS); 22265a255516SAlexander V. Chernikov 22275a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 22285a255516SAlexander V. Chernikov LLE_WLOCK(ln); 22295a255516SAlexander V. Chernikov /* Unlink any entry if exists */ 22305a255516SAlexander V. Chernikov ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst); 22315a255516SAlexander V. Chernikov if (ln_tmp != NULL) 22325a255516SAlexander V. Chernikov lltable_unlink_entry(LLTABLE6(ifp), ln_tmp); 22335a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 22345a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 22355a255516SAlexander V. Chernikov 22365a255516SAlexander V. Chernikov if (ln_tmp != NULL) 22375a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED); 22385a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 22395a255516SAlexander V. Chernikov 22405a255516SAlexander V. Chernikov LLE_WUNLOCK(ln); 22415a255516SAlexander V. Chernikov if (ln_tmp != NULL) 22425a255516SAlexander V. Chernikov llentry_free(ln_tmp); 22435a255516SAlexander V. Chernikov 22445a255516SAlexander V. Chernikov return (0); 2245f6b84910SAlexander V. Chernikov } 2246f6b84910SAlexander V. Chernikov 2247f6b84910SAlexander V. Chernikov /* 2248*3e7a2321SAlexander V. Chernikov * Removes either all lle entries for given @ia, or lle 2249*3e7a2321SAlexander V. Chernikov * corresponding to @ia address. 2250f6b84910SAlexander V. Chernikov */ 2251f6b84910SAlexander V. Chernikov void 2252*3e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all) 2253f6b84910SAlexander V. Chernikov { 2254f6b84910SAlexander V. Chernikov struct sockaddr_in6 mask, addr; 2255*3e7a2321SAlexander V. Chernikov struct sockaddr *saddr, *smask; 2256f6b84910SAlexander V. Chernikov struct ifnet *ifp; 2257f6b84910SAlexander V. Chernikov 2258f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2259f6b84910SAlexander V. Chernikov memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 2260f6b84910SAlexander V. Chernikov memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 2261*3e7a2321SAlexander V. Chernikov saddr = (struct sockaddr *)&addr; 2262*3e7a2321SAlexander V. Chernikov smask = (struct sockaddr *)&mask; 2263*3e7a2321SAlexander V. Chernikov 2264*3e7a2321SAlexander V. Chernikov if (all != 0) 2265*3e7a2321SAlexander V. Chernikov lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC); 2266*3e7a2321SAlexander V. Chernikov else 2267*3e7a2321SAlexander V. Chernikov lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr); 2268f6b84910SAlexander V. Chernikov } 2269f6b84910SAlexander V. Chernikov 2270f6b84910SAlexander V. Chernikov /* 22716e6b3f7cSQing Li * the callers of this function need to be re-worked to drop 22726e6b3f7cSQing Li * the lle lock, drop here for now 22736e6b3f7cSQing Li */ 227433841545SHajimu UMEMOTO int 2275bbd8aebaSQing Li nd6_storelladdr(struct ifnet *ifp, struct mbuf *m, 227674860d4fSAlexander V. Chernikov const struct sockaddr *dst, u_char *desten, uint32_t *pflags) 227782cd038dSYoshinobu Inoue { 22786e6b3f7cSQing Li struct llentry *ln; 227982cd038dSYoshinobu Inoue 228074860d4fSAlexander V. Chernikov if (pflags != NULL) 228174860d4fSAlexander V. Chernikov *pflags = 0; 22826e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 2283f31b83e1SNavdeep Parhar if (m != NULL && m->m_flags & M_MCAST) { 228482cd038dSYoshinobu Inoue switch (ifp->if_type) { 228582cd038dSYoshinobu Inoue case IFT_ETHER: 228682cd038dSYoshinobu Inoue case IFT_FDDI: 228705b6760dSMunechika SUMIKAWA case IFT_L2VLAN: 228833841545SHajimu UMEMOTO case IFT_IEEE80211: 228959280079SAndrew Thompson case IFT_BRIDGE: 22902049fdeeSMatthew N. Dodd case IFT_ISO88025: 229182cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&SIN6(dst)->sin6_addr, 229282cd038dSYoshinobu Inoue desten); 2293354c3d34SLuigi Rizzo return (0); 229482cd038dSYoshinobu Inoue default: 2295fef5fd23SBosko Milekic m_freem(m); 2296354c3d34SLuigi Rizzo return (EAFNOSUPPORT); 229782cd038dSYoshinobu Inoue } 229882cd038dSYoshinobu Inoue } 229982cd038dSYoshinobu Inoue 23006e6b3f7cSQing Li 23016e6b3f7cSQing Li /* 23026e6b3f7cSQing Li * the entry should have been created in nd6_store_lladdr 23036e6b3f7cSQing Li */ 230473cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 23056e6b3f7cSQing Li ln = lla_lookup(LLTABLE6(ifp), 0, dst); 230673cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 23076e6b3f7cSQing Li if ((ln == NULL) || !(ln->la_flags & LLE_VALID)) { 230815209fb6SKip Macy if (ln != NULL) 23096e6b3f7cSQing Li LLE_RUNLOCK(ln); 2310530f95fcSGleb Smirnoff /* this could happen, if we could not allocate memory */ 2311530f95fcSGleb Smirnoff m_freem(m); 23126e6b3f7cSQing Li return (1); 2313530f95fcSGleb Smirnoff } 2314530f95fcSGleb Smirnoff 23156e6b3f7cSQing Li bcopy(&ln->ll_addr, desten, ifp->if_addrlen); 231674860d4fSAlexander V. Chernikov if (pflags != NULL) 231774860d4fSAlexander V. Chernikov *pflags = ln->la_flags; 23186e6b3f7cSQing Li LLE_RUNLOCK(ln); 23196e6b3f7cSQing Li /* 23206e6b3f7cSQing Li * A *small* use after free race exists here 23216e6b3f7cSQing Li */ 2322cd46a114SLuigi Rizzo return (0); 232382cd038dSYoshinobu Inoue } 232433841545SHajimu UMEMOTO 232531d4137bSSUZUKI Shinsuke static void 23266e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln) 232731d4137bSSUZUKI Shinsuke { 232831d4137bSSUZUKI Shinsuke struct mbuf *m_hold, *m_hold_next; 232931d4137bSSUZUKI Shinsuke 23306e6b3f7cSQing Li for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) { 233131d4137bSSUZUKI Shinsuke m_hold_next = m_hold->m_nextpkt; 233231d4137bSSUZUKI Shinsuke m_freem(m_hold); 233331d4137bSSUZUKI Shinsuke } 233431d4137bSSUZUKI Shinsuke 23356e6b3f7cSQing Li ln->la_hold = NULL; 233631d4137bSSUZUKI Shinsuke return; 233731d4137bSSUZUKI Shinsuke } 233831d4137bSSUZUKI Shinsuke 233933841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS); 234033841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS); 234133841545SHajimu UMEMOTO #ifdef SYSCTL_DECL 234233841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6); 234333841545SHajimu UMEMOTO #endif 234433841545SHajimu UMEMOTO SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist, 234533841545SHajimu UMEMOTO CTLFLAG_RD, nd6_sysctl_drlist, ""); 234633841545SHajimu UMEMOTO SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist, 234733841545SHajimu UMEMOTO CTLFLAG_RD, nd6_sysctl_prlist, ""); 23486df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen, 23496df8a710SGleb Smirnoff CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, ""); 23506df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer, 23516df8a710SGleb Smirnoff CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), ""); 235233841545SHajimu UMEMOTO 235333841545SHajimu UMEMOTO static int 235433841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS) 235533841545SHajimu UMEMOTO { 23567195094cSMarius Strobl struct in6_defrouter d; 235733841545SHajimu UMEMOTO struct nd_defrouter *dr; 23587195094cSMarius Strobl int error; 235933841545SHajimu UMEMOTO 236033841545SHajimu UMEMOTO if (req->newptr) 23617195094cSMarius Strobl return (EPERM); 236233841545SHajimu UMEMOTO 23637195094cSMarius Strobl bzero(&d, sizeof(d)); 23647195094cSMarius Strobl d.rtaddr.sin6_family = AF_INET6; 23657195094cSMarius Strobl d.rtaddr.sin6_len = sizeof(d.rtaddr); 23667195094cSMarius Strobl 23677195094cSMarius Strobl /* 23687195094cSMarius Strobl * XXX locking 23697195094cSMarius Strobl */ 23703b0b2840SJohn Baldwin TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) { 23717195094cSMarius Strobl d.rtaddr.sin6_addr = dr->rtaddr; 23727195094cSMarius Strobl error = sa6_recoverscope(&d.rtaddr); 2373edbb8b46SPeter Wemm if (error != 0) 2374b2630c29SGeorge V. Neville-Neil return (error); 23757195094cSMarius Strobl d.flags = dr->flags; 23767195094cSMarius Strobl d.rtlifetime = dr->rtlifetime; 2377ffa0165aSHiroki Sato d.expire = dr->expire + (time_second - time_uptime); 23787195094cSMarius Strobl d.if_index = dr->ifp->if_index; 23797195094cSMarius Strobl error = SYSCTL_OUT(req, &d, sizeof(d)); 23807195094cSMarius Strobl if (error != 0) 238107eb2995SHajimu UMEMOTO return (error); 238233841545SHajimu UMEMOTO } 23837195094cSMarius Strobl return (0); 23847195094cSMarius Strobl } 238533841545SHajimu UMEMOTO 238633841545SHajimu UMEMOTO static int 238733841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS) 238833841545SHajimu UMEMOTO { 23897195094cSMarius Strobl struct in6_prefix p; 23907195094cSMarius Strobl struct sockaddr_in6 s6; 239133841545SHajimu UMEMOTO struct nd_prefix *pr; 23927195094cSMarius Strobl struct nd_pfxrouter *pfr; 23937195094cSMarius Strobl time_t maxexpire; 23947195094cSMarius Strobl int error; 23951d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 239633841545SHajimu UMEMOTO 239733841545SHajimu UMEMOTO if (req->newptr) 23987195094cSMarius Strobl return (EPERM); 239933841545SHajimu UMEMOTO 24007195094cSMarius Strobl bzero(&p, sizeof(p)); 24017195094cSMarius Strobl p.origin = PR_ORIG_RA; 24027195094cSMarius Strobl bzero(&s6, sizeof(s6)); 24037195094cSMarius Strobl s6.sin6_family = AF_INET6; 24047195094cSMarius Strobl s6.sin6_len = sizeof(s6); 24057195094cSMarius Strobl 24067195094cSMarius Strobl /* 24077195094cSMarius Strobl * XXX locking 24087195094cSMarius Strobl */ 24093b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 24107195094cSMarius Strobl p.prefix = pr->ndpr_prefix; 24117195094cSMarius Strobl if (sa6_recoverscope(&p.prefix)) { 24127195094cSMarius Strobl log(LOG_ERR, "scope error in prefix list (%s)\n", 24137195094cSMarius Strobl ip6_sprintf(ip6buf, &p.prefix.sin6_addr)); 2414a1f7e5f8SHajimu UMEMOTO /* XXX: press on... */ 2415a1f7e5f8SHajimu UMEMOTO } 24167195094cSMarius Strobl p.raflags = pr->ndpr_raf; 24177195094cSMarius Strobl p.prefixlen = pr->ndpr_plen; 24187195094cSMarius Strobl p.vltime = pr->ndpr_vltime; 24197195094cSMarius Strobl p.pltime = pr->ndpr_pltime; 24207195094cSMarius Strobl p.if_index = pr->ndpr_ifp->if_index; 2421743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME) 24227195094cSMarius Strobl p.expire = 0; 2423743eee66SSUZUKI Shinsuke else { 2424743eee66SSUZUKI Shinsuke /* XXX: we assume time_t is signed. */ 2425743eee66SSUZUKI Shinsuke maxexpire = (-1) & 24267195094cSMarius Strobl ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 24277195094cSMarius Strobl if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate) 24287195094cSMarius Strobl p.expire = pr->ndpr_lastupdate + 2429ffa0165aSHiroki Sato pr->ndpr_vltime + 2430ffa0165aSHiroki Sato (time_second - time_uptime); 24317195094cSMarius Strobl else 24327195094cSMarius Strobl p.expire = maxexpire; 2433743eee66SSUZUKI Shinsuke } 24347195094cSMarius Strobl p.refcnt = pr->ndpr_refcnt; 24357195094cSMarius Strobl p.flags = pr->ndpr_stateflags; 24367195094cSMarius Strobl p.advrtrs = 0; 24377195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) 24387195094cSMarius Strobl p.advrtrs++; 24397195094cSMarius Strobl error = SYSCTL_OUT(req, &p, sizeof(p)); 24407195094cSMarius Strobl if (error != 0) 244107eb2995SHajimu UMEMOTO return (error); 24427195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) { 24437195094cSMarius Strobl s6.sin6_addr = pfr->router->rtaddr; 24447195094cSMarius Strobl if (sa6_recoverscope(&s6)) 24457195094cSMarius Strobl log(LOG_ERR, 24467195094cSMarius Strobl "scope error in prefix list (%s)\n", 24477195094cSMarius Strobl ip6_sprintf(ip6buf, &pfr->router->rtaddr)); 24487195094cSMarius Strobl error = SYSCTL_OUT(req, &s6, sizeof(s6)); 24497195094cSMarius Strobl if (error != 0) 24507195094cSMarius Strobl return (error); 24517195094cSMarius Strobl } 24527195094cSMarius Strobl } 24537195094cSMarius Strobl return (0); 245433841545SHajimu UMEMOTO } 2455