1caf43b02SWarner Losh /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 482cd038dSYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 582cd038dSYoshinobu Inoue * All rights reserved. 682cd038dSYoshinobu Inoue * 782cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 882cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 982cd038dSYoshinobu Inoue * are met: 1082cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 1182cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1282cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1382cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1482cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1582cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1682cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1782cd038dSYoshinobu Inoue * without specific prior written permission. 1882cd038dSYoshinobu Inoue * 1982cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2082cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2182cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2282cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2382cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2482cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2582cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2682cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2782cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2882cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2982cd038dSYoshinobu Inoue * SUCH DAMAGE. 30b48287a3SDavid E. O'Brien * 31b48287a3SDavid E. O'Brien * $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $ 3282cd038dSYoshinobu Inoue */ 3382cd038dSYoshinobu Inoue 34b48287a3SDavid E. O'Brien #include <sys/cdefs.h> 35b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$"); 36b48287a3SDavid E. O'Brien 37686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 38686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 39686cdd19SJun-ichiro itojun Hagino 4082cd038dSYoshinobu Inoue #include <sys/param.h> 4182cd038dSYoshinobu Inoue #include <sys/systm.h> 42e2e050c8SConrad Meyer #include <sys/eventhandler.h> 4333841545SHajimu UMEMOTO #include <sys/callout.h> 44d748f7efSMark Johnston #include <sys/lock.h> 4582cd038dSYoshinobu Inoue #include <sys/malloc.h> 4682cd038dSYoshinobu Inoue #include <sys/mbuf.h> 47d748f7efSMark Johnston #include <sys/mutex.h> 4882cd038dSYoshinobu Inoue #include <sys/socket.h> 4982cd038dSYoshinobu Inoue #include <sys/sockio.h> 5082cd038dSYoshinobu Inoue #include <sys/time.h> 5182cd038dSYoshinobu Inoue #include <sys/kernel.h> 52686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h> 5382cd038dSYoshinobu Inoue #include <sys/errno.h> 5482cd038dSYoshinobu Inoue #include <sys/syslog.h> 556e6b3f7cSQing Li #include <sys/rwlock.h> 5682cd038dSYoshinobu Inoue #include <sys/queue.h> 5757f60867SMark Johnston #include <sys/sdt.h> 5833841545SHajimu UMEMOTO #include <sys/sysctl.h> 5982cd038dSYoshinobu Inoue 6082cd038dSYoshinobu Inoue #include <net/if.h> 6176039bc8SGleb Smirnoff #include <net/if_var.h> 6282cd038dSYoshinobu Inoue #include <net/if_dl.h> 6382cd038dSYoshinobu Inoue #include <net/if_types.h> 6482cd038dSYoshinobu Inoue #include <net/route.h> 654b79449eSBjoern A. Zeeb #include <net/vnet.h> 6682cd038dSYoshinobu Inoue 6782cd038dSYoshinobu Inoue #include <netinet/in.h> 6857f60867SMark Johnston #include <netinet/in_kdtrace.h> 696e6b3f7cSQing Li #include <net/if_llatbl.h> 7082cd038dSYoshinobu Inoue #include <netinet/if_ether.h> 7182cd038dSYoshinobu Inoue #include <netinet6/in6_var.h> 72686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 7382cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h> 74a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 7582cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 76a283298cSHiroki Sato #include <netinet6/in6_ifattach.h> 77686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 781db8d1f8SAna Kukec #include <netinet6/send.h> 7982cd038dSYoshinobu Inoue 80743eee66SSUZUKI Shinsuke #include <sys/limits.h> 81743eee66SSUZUKI Shinsuke 82aed55708SRobert Watson #include <security/mac/mac_framework.h> 83aed55708SRobert Watson 8482cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */ 8582cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */ 8682cd038dSYoshinobu Inoue 8747e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s)) 8882cd038dSYoshinobu Inoue 895e0a6f31SMark Johnston MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery"); 905e0a6f31SMark Johnston 9182cea7e6SBjoern A. Zeeb /* timer values */ 9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune) = 1; /* walk list every 1 seconds */ 9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay) = 5; /* delay first probe time 5 second */ 9482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries) = 3; /* maximum unicast query */ 9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries) = 3; /* maximum multicast query */ 9682cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1; /* use loopback interface for 9782cea7e6SBjoern A. Zeeb * local traffic */ 9882cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer) = (60 * 60 * 24); /* 1 day: garbage 9982cea7e6SBjoern A. Zeeb * collection timer */ 100686cdd19SJun-ichiro itojun Hagino 101686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */ 1025f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nd6_maxndopt) = 10; /* max # of ND options allowed */ 10382cea7e6SBjoern A. Zeeb 10482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper 10582cea7e6SBjoern A. Zeeb * layer hints */ 1065f901c92SAndrew Turner VNET_DEFINE_STATIC(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved 10782cea7e6SBjoern A. Zeeb * ND entries */ 1081e77c105SRobert Watson #define V_nd6_maxndopt VNET(nd6_maxndopt) 1091e77c105SRobert Watson #define V_nd6_maxqueuelen VNET(nd6_maxqueuelen) 110686cdd19SJun-ichiro itojun Hagino 11182cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG 11282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1; 11382cea7e6SBjoern A. Zeeb #else 11482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0; 11582cea7e6SBjoern A. Zeeb #endif 11633841545SHajimu UMEMOTO 11730b45077SBjoern A. Zeeb static eventhandler_tag lle_event_eh, iflladdr_event_eh, ifnet_link_event_eh; 11830aee131SAndrey V. Elsukov 119eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter); 120eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix); 1214de485feSMark Johnston VNET_DEFINE(struct rwlock, nd6_lock); 122d748f7efSMark Johnston VNET_DEFINE(uint64_t, nd6_list_genid); 123d748f7efSMark Johnston VNET_DEFINE(struct mtx, nd6_onlink_mtx); 12482cd038dSYoshinobu Inoue 12582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL; 1261e77c105SRobert Watson #define V_nd6_recalc_reachtm_interval VNET(nd6_recalc_reachtm_interval) 12744e33a07SMarko Zec 1281db8d1f8SAna Kukec int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int); 1291db8d1f8SAna Kukec 130f0316e1aSAlexander V. Chernikov static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *, 1316f56329aSXin LI struct ifnet *); 1329233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *); 1339233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *); 1349233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *); 135435bece4SMark Johnston static void nd6_free(struct llentry **, int); 13617a03656SEric van Gyzen static void nd6_free_redirect(const struct llentry *); 1379233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *); 1389b420b3dSAlexander V. Chernikov static void nd6_llinfo_settimer_locked(struct llentry *, long); 1396e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *); 140f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 1414fb3a820SAlexander V. Chernikov static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *, 1426d768226SGeorge V. Neville-Neil const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **); 1431fe201c3SAlexander V. Chernikov static int nd6_need_cache(struct ifnet *); 1441fe201c3SAlexander V. Chernikov 14533841545SHajimu UMEMOTO 1465f901c92SAndrew Turner VNET_DEFINE_STATIC(struct callout, nd6_slowtimo_ch); 1471e77c105SRobert Watson #define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch) 148eddfbb76SRobert Watson 149eddfbb76SRobert Watson VNET_DEFINE(struct callout, nd6_timer_ch); 1509901091eSBjoern A. Zeeb #define V_nd6_timer_ch VNET(nd6_timer_ch) 151eddfbb76SRobert Watson 15230aee131SAndrey V. Elsukov static void 15330aee131SAndrey V. Elsukov nd6_lle_event(void *arg __unused, struct llentry *lle, int evt) 15430aee131SAndrey V. Elsukov { 15530aee131SAndrey V. Elsukov struct rt_addrinfo rtinfo; 156314294deSAlexander V. Chernikov struct sockaddr_in6 dst; 15730aee131SAndrey V. Elsukov struct sockaddr_dl gw; 15830aee131SAndrey V. Elsukov struct ifnet *ifp; 15930aee131SAndrey V. Elsukov int type; 160559b4296SAlan Somers int fibnum; 16130aee131SAndrey V. Elsukov 16230aee131SAndrey V. Elsukov LLE_WLOCK_ASSERT(lle); 16330aee131SAndrey V. Elsukov 164314294deSAlexander V. Chernikov if (lltable_get_af(lle->lle_tbl) != AF_INET6) 165314294deSAlexander V. Chernikov return; 166314294deSAlexander V. Chernikov 16730aee131SAndrey V. Elsukov switch (evt) { 16830aee131SAndrey V. Elsukov case LLENTRY_RESOLVED: 16930aee131SAndrey V. Elsukov type = RTM_ADD; 17030aee131SAndrey V. Elsukov KASSERT(lle->la_flags & LLE_VALID, 17130aee131SAndrey V. Elsukov ("%s: %p resolved but not valid?", __func__, lle)); 17230aee131SAndrey V. Elsukov break; 17330aee131SAndrey V. Elsukov case LLENTRY_EXPIRED: 17430aee131SAndrey V. Elsukov type = RTM_DELETE; 17530aee131SAndrey V. Elsukov break; 17630aee131SAndrey V. Elsukov default: 17730aee131SAndrey V. Elsukov return; 17830aee131SAndrey V. Elsukov } 17930aee131SAndrey V. Elsukov 180314294deSAlexander V. Chernikov ifp = lltable_get_ifp(lle->lle_tbl); 18130aee131SAndrey V. Elsukov 18230aee131SAndrey V. Elsukov bzero(&dst, sizeof(dst)); 18330aee131SAndrey V. Elsukov bzero(&gw, sizeof(gw)); 18430aee131SAndrey V. Elsukov bzero(&rtinfo, sizeof(rtinfo)); 185314294deSAlexander V. Chernikov lltable_fill_sa_entry(lle, (struct sockaddr *)&dst); 18630aee131SAndrey V. Elsukov dst.sin6_scope_id = in6_getscopezone(ifp, 187314294deSAlexander V. Chernikov in6_addrscope(&dst.sin6_addr)); 18830aee131SAndrey V. Elsukov gw.sdl_len = sizeof(struct sockaddr_dl); 18930aee131SAndrey V. Elsukov gw.sdl_family = AF_LINK; 19030aee131SAndrey V. Elsukov gw.sdl_alen = ifp->if_addrlen; 19130aee131SAndrey V. Elsukov gw.sdl_index = ifp->if_index; 19230aee131SAndrey V. Elsukov gw.sdl_type = ifp->if_type; 19330aee131SAndrey V. Elsukov if (evt == LLENTRY_RESOLVED) 1944fb3a820SAlexander V. Chernikov bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen); 19530aee131SAndrey V. Elsukov rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst; 19630aee131SAndrey V. Elsukov rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw; 19730aee131SAndrey V. Elsukov rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY; 198559b4296SAlan Somers fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ifp->if_fib; 19930aee131SAndrey V. Elsukov rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | ( 200559b4296SAlan Somers type == RTM_ADD ? RTF_UP: 0), 0, fibnum); 20130aee131SAndrey V. Elsukov } 20230aee131SAndrey V. Elsukov 2034fb3a820SAlexander V. Chernikov /* 2044fb3a820SAlexander V. Chernikov * A handler for interface link layer address change event. 2054fb3a820SAlexander V. Chernikov */ 2064fb3a820SAlexander V. Chernikov static void 2074fb3a820SAlexander V. Chernikov nd6_iflladdr(void *arg __unused, struct ifnet *ifp) 2084fb3a820SAlexander V. Chernikov { 2094fb3a820SAlexander V. Chernikov 2104fb3a820SAlexander V. Chernikov lltable_update_ifaddr(LLTABLE6(ifp)); 2114fb3a820SAlexander V. Chernikov } 2124fb3a820SAlexander V. Chernikov 21382cd038dSYoshinobu Inoue void 2141272577eSXin LI nd6_init(void) 21582cd038dSYoshinobu Inoue { 21682cd038dSYoshinobu Inoue 217d748f7efSMark Johnston mtx_init(&V_nd6_onlink_mtx, "nd6 onlink", NULL, MTX_DEF); 218d748f7efSMark Johnston rw_init(&V_nd6_lock, "nd6 list"); 2194de485feSMark Johnston 22044e33a07SMarko Zec LIST_INIT(&V_nd_prefix); 221603724d3SBjoern A. Zeeb TAILQ_INIT(&V_nd_defrouter); 22282cea7e6SBjoern A. Zeeb 2239901091eSBjoern A. Zeeb /* Start timers. */ 224603724d3SBjoern A. Zeeb callout_init(&V_nd6_slowtimo_ch, 0); 225603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 226f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 227d6ad6a86SMark Johnston 2289901091eSBjoern A. Zeeb callout_init(&V_nd6_timer_ch, 0); 2299901091eSBjoern A. Zeeb callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet); 2309901091eSBjoern A. Zeeb 231d6ad6a86SMark Johnston nd6_dad_init(); 2324fb3a820SAlexander V. Chernikov if (IS_DEFAULT_VNET(curvnet)) { 23330aee131SAndrey V. Elsukov lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event, 23430aee131SAndrey V. Elsukov NULL, EVENTHANDLER_PRI_ANY); 2354fb3a820SAlexander V. Chernikov iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event, 2364fb3a820SAlexander V. Chernikov nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 23730b45077SBjoern A. Zeeb ifnet_link_event_eh = EVENTHANDLER_REGISTER(ifnet_link_event, 23830b45077SBjoern A. Zeeb nd6_ifnet_link_event, NULL, EVENTHANDLER_PRI_ANY); 2394fb3a820SAlexander V. Chernikov } 24082cd038dSYoshinobu Inoue } 24182cd038dSYoshinobu Inoue 242bc29160dSMarko Zec #ifdef VIMAGE 243bc29160dSMarko Zec void 244bc29160dSMarko Zec nd6_destroy() 245bc29160dSMarko Zec { 246bc29160dSMarko Zec 247bc29160dSMarko Zec callout_drain(&V_nd6_slowtimo_ch); 248bc29160dSMarko Zec callout_drain(&V_nd6_timer_ch); 2494fb3a820SAlexander V. Chernikov if (IS_DEFAULT_VNET(curvnet)) { 25030b45077SBjoern A. Zeeb EVENTHANDLER_DEREGISTER(ifnet_link_event, ifnet_link_event_eh); 25130aee131SAndrey V. Elsukov EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh); 2524fb3a820SAlexander V. Chernikov EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh); 2534fb3a820SAlexander V. Chernikov } 2544de485feSMark Johnston rw_destroy(&V_nd6_lock); 255d748f7efSMark Johnston mtx_destroy(&V_nd6_onlink_mtx); 256bc29160dSMarko Zec } 257bc29160dSMarko Zec #endif 258bc29160dSMarko Zec 25931b1bfe1SHajimu UMEMOTO struct nd_ifinfo * 2601272577eSXin LI nd6_ifattach(struct ifnet *ifp) 26182cd038dSYoshinobu Inoue { 26231b1bfe1SHajimu UMEMOTO struct nd_ifinfo *nd; 26382cd038dSYoshinobu Inoue 264fc315641SMark Johnston nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO); 26531b1bfe1SHajimu UMEMOTO nd->initialized = 1; 26682cd038dSYoshinobu Inoue 26731b1bfe1SHajimu UMEMOTO nd->chlim = IPV6_DEFHLIM; 26831b1bfe1SHajimu UMEMOTO nd->basereachable = REACHABLE_TIME; 26931b1bfe1SHajimu UMEMOTO nd->reachable = ND_COMPUTE_RTIME(nd->basereachable); 27031b1bfe1SHajimu UMEMOTO nd->retrans = RETRANS_TIMER; 271a283298cSHiroki Sato 272a283298cSHiroki Sato nd->flags = ND6_IFF_PERFORMNUD; 273a283298cSHiroki Sato 274af805644SHiroki Sato /* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL. 275af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by 276af805644SHiroki Sato * default regardless of the V_ip6_auto_linklocal configuration to 277af805644SHiroki Sato * give a reasonable default behavior. 278af805644SHiroki Sato */ 279af805644SHiroki Sato if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) || 280af805644SHiroki Sato (ifp->if_flags & IFF_LOOPBACK)) 281a283298cSHiroki Sato nd->flags |= ND6_IFF_AUTO_LINKLOCAL; 282af805644SHiroki Sato /* 283af805644SHiroki Sato * A loopback interface does not need to accept RTADV. 284af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by 285af805644SHiroki Sato * default regardless of the V_ip6_accept_rtadv configuration to 286af805644SHiroki Sato * prevent the interface from accepting RA messages arrived 287af805644SHiroki Sato * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV. 288af805644SHiroki Sato */ 289af805644SHiroki Sato if (V_ip6_accept_rtadv && 290af805644SHiroki Sato !(ifp->if_flags & IFF_LOOPBACK) && 291af805644SHiroki Sato (ifp->if_type != IFT_BRIDGE)) 292a283298cSHiroki Sato nd->flags |= ND6_IFF_ACCEPT_RTADV; 293e7fa8d0aSHiroki Sato if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK)) 294e7fa8d0aSHiroki Sato nd->flags |= ND6_IFF_NO_RADR; 29531b1bfe1SHajimu UMEMOTO 29631b1bfe1SHajimu UMEMOTO /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */ 29731b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, nd); 29831b1bfe1SHajimu UMEMOTO 29931b1bfe1SHajimu UMEMOTO return nd; 30031b1bfe1SHajimu UMEMOTO } 30131b1bfe1SHajimu UMEMOTO 30231b1bfe1SHajimu UMEMOTO void 30389856f7eSBjoern A. Zeeb nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd) 30431b1bfe1SHajimu UMEMOTO { 305a68cc388SGleb Smirnoff struct epoch_tracker et; 30689856f7eSBjoern A. Zeeb struct ifaddr *ifa, *next; 30789856f7eSBjoern A. Zeeb 308a68cc388SGleb Smirnoff NET_EPOCH_ENTER(et); 309d7c5a620SMatt Macy CK_STAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 31089856f7eSBjoern A. Zeeb if (ifa->ifa_addr->sa_family != AF_INET6) 31189856f7eSBjoern A. Zeeb continue; 31289856f7eSBjoern A. Zeeb 31389856f7eSBjoern A. Zeeb /* stop DAD processing */ 31489856f7eSBjoern A. Zeeb nd6_dad_stop(ifa); 31589856f7eSBjoern A. Zeeb } 316a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 31731b1bfe1SHajimu UMEMOTO 31831b1bfe1SHajimu UMEMOTO free(nd, M_IP6NDP); 31982cd038dSYoshinobu Inoue } 32082cd038dSYoshinobu Inoue 32182cd038dSYoshinobu Inoue /* 32282cd038dSYoshinobu Inoue * Reset ND level link MTU. This function is called when the physical MTU 32382cd038dSYoshinobu Inoue * changes, which means we might have to adjust the ND level MTU. 32482cd038dSYoshinobu Inoue */ 32582cd038dSYoshinobu Inoue void 3261272577eSXin LI nd6_setmtu(struct ifnet *ifp) 32782cd038dSYoshinobu Inoue { 3287e037c12SKristof Provost if (ifp->if_afdata[AF_INET6] == NULL) 3297e037c12SKristof Provost return; 33031b1bfe1SHajimu UMEMOTO 33131b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, ND_IFINFO(ifp)); 33231b1bfe1SHajimu UMEMOTO } 33331b1bfe1SHajimu UMEMOTO 33431b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */ 33531b1bfe1SHajimu UMEMOTO void 3361272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi) 33731b1bfe1SHajimu UMEMOTO { 33831b3783cSHajimu UMEMOTO u_int32_t omaxmtu; 33931b1bfe1SHajimu UMEMOTO 34031b3783cSHajimu UMEMOTO omaxmtu = ndi->maxmtu; 34182cd038dSYoshinobu Inoue ndi->maxmtu = ifp->if_mtu; 34282cd038dSYoshinobu Inoue 34382cd038dSYoshinobu Inoue /* 34431b3783cSHajimu UMEMOTO * Decreasing the interface MTU under IPV6 minimum MTU may cause 34531b3783cSHajimu UMEMOTO * undesirable situation. We thus notify the operator of the change 34631b3783cSHajimu UMEMOTO * explicitly. The check for omaxmtu is necessary to restrict the 34731b3783cSHajimu UMEMOTO * log to the case of changing the MTU, not initializing it. 34882cd038dSYoshinobu Inoue */ 34931b3783cSHajimu UMEMOTO if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) { 35031b3783cSHajimu UMEMOTO log(LOG_NOTICE, "nd6_setmtu0: " 35131b3783cSHajimu UMEMOTO "new link MTU on %s (%lu) is too small for IPv6\n", 35231b3783cSHajimu UMEMOTO if_name(ifp), (unsigned long)ndi->maxmtu); 35382cd038dSYoshinobu Inoue } 35431b3783cSHajimu UMEMOTO 355603724d3SBjoern A. Zeeb if (ndi->maxmtu > V_in6_maxmtu) 35631b3783cSHajimu UMEMOTO in6_setmaxmtu(); /* check all interfaces just in case */ 35731b3783cSHajimu UMEMOTO 35882cd038dSYoshinobu Inoue } 35982cd038dSYoshinobu Inoue 36082cd038dSYoshinobu Inoue void 3611272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts) 36282cd038dSYoshinobu Inoue { 36307eb2995SHajimu UMEMOTO 36482cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 36582cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 36682cd038dSYoshinobu Inoue ndopts->nd_opts_last 36782cd038dSYoshinobu Inoue = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 36882cd038dSYoshinobu Inoue 36982cd038dSYoshinobu Inoue if (icmp6len == 0) { 37082cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 37182cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 37282cd038dSYoshinobu Inoue } 37382cd038dSYoshinobu Inoue } 37482cd038dSYoshinobu Inoue 37582cd038dSYoshinobu Inoue /* 37682cd038dSYoshinobu Inoue * Take one ND option. 37782cd038dSYoshinobu Inoue */ 37882cd038dSYoshinobu Inoue struct nd_opt_hdr * 3791272577eSXin LI nd6_option(union nd_opts *ndopts) 38082cd038dSYoshinobu Inoue { 38182cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 38282cd038dSYoshinobu Inoue int olen; 38382cd038dSYoshinobu Inoue 38439e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 38539e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 38639e19560SBjoern A. Zeeb __func__)); 3872ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 38882cd038dSYoshinobu Inoue return NULL; 38982cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 39082cd038dSYoshinobu Inoue return NULL; 39182cd038dSYoshinobu Inoue 39282cd038dSYoshinobu Inoue nd_opt = ndopts->nd_opts_search; 39382cd038dSYoshinobu Inoue 39419391949SKris Kennaway /* make sure nd_opt_len is inside the buffer */ 39519391949SKris Kennaway if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) { 39619391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 39719391949SKris Kennaway return NULL; 39819391949SKris Kennaway } 39919391949SKris Kennaway 40082cd038dSYoshinobu Inoue olen = nd_opt->nd_opt_len << 3; 40182cd038dSYoshinobu Inoue if (olen == 0) { 40282cd038dSYoshinobu Inoue /* 40382cd038dSYoshinobu Inoue * Message validation requires that all included 40482cd038dSYoshinobu Inoue * options have a length that is greater than zero. 40582cd038dSYoshinobu Inoue */ 40682cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 40782cd038dSYoshinobu Inoue return NULL; 40882cd038dSYoshinobu Inoue } 40982cd038dSYoshinobu Inoue 41082cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 41119391949SKris Kennaway if (ndopts->nd_opts_search > ndopts->nd_opts_last) { 41219391949SKris Kennaway /* option overruns the end of buffer, invalid */ 41319391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 41419391949SKris Kennaway return NULL; 41519391949SKris Kennaway } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) { 41619391949SKris Kennaway /* reached the end of options chain */ 41782cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 41882cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 41982cd038dSYoshinobu Inoue } 42082cd038dSYoshinobu Inoue return nd_opt; 42182cd038dSYoshinobu Inoue } 42282cd038dSYoshinobu Inoue 42382cd038dSYoshinobu Inoue /* 42482cd038dSYoshinobu Inoue * Parse multiple ND options. 42582cd038dSYoshinobu Inoue * This function is much easier to use, for ND routines that do not need 42682cd038dSYoshinobu Inoue * multiple options of the same type. 42782cd038dSYoshinobu Inoue */ 42882cd038dSYoshinobu Inoue int 4291272577eSXin LI nd6_options(union nd_opts *ndopts) 43082cd038dSYoshinobu Inoue { 43182cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 43282cd038dSYoshinobu Inoue int i = 0; 43382cd038dSYoshinobu Inoue 43439e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 43539e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 43639e19560SBjoern A. Zeeb __func__)); 4372ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 43882cd038dSYoshinobu Inoue return 0; 43982cd038dSYoshinobu Inoue 44082cd038dSYoshinobu Inoue while (1) { 44182cd038dSYoshinobu Inoue nd_opt = nd6_option(ndopts); 4422ce62dceSSUZUKI Shinsuke if (nd_opt == NULL && ndopts->nd_opts_last == NULL) { 44382cd038dSYoshinobu Inoue /* 44482cd038dSYoshinobu Inoue * Message validation requires that all included 44582cd038dSYoshinobu Inoue * options have a length that is greater than zero. 44682cd038dSYoshinobu Inoue */ 447e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_badopt); 44882cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 44982cd038dSYoshinobu Inoue return -1; 45082cd038dSYoshinobu Inoue } 45182cd038dSYoshinobu Inoue 4522ce62dceSSUZUKI Shinsuke if (nd_opt == NULL) 45382cd038dSYoshinobu Inoue goto skip1; 45482cd038dSYoshinobu Inoue 45582cd038dSYoshinobu Inoue switch (nd_opt->nd_opt_type) { 45682cd038dSYoshinobu Inoue case ND_OPT_SOURCE_LINKADDR: 45782cd038dSYoshinobu Inoue case ND_OPT_TARGET_LINKADDR: 45882cd038dSYoshinobu Inoue case ND_OPT_MTU: 45982cd038dSYoshinobu Inoue case ND_OPT_REDIRECTED_HEADER: 46011d8451dSHiroki Sato case ND_OPT_NONCE: 46182cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 46233841545SHajimu UMEMOTO nd6log((LOG_INFO, 46333841545SHajimu UMEMOTO "duplicated ND6 option found (type=%d)\n", 46433841545SHajimu UMEMOTO nd_opt->nd_opt_type)); 46582cd038dSYoshinobu Inoue /* XXX bark? */ 46682cd038dSYoshinobu Inoue } else { 46782cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 46882cd038dSYoshinobu Inoue = nd_opt; 46982cd038dSYoshinobu Inoue } 47082cd038dSYoshinobu Inoue break; 47182cd038dSYoshinobu Inoue case ND_OPT_PREFIX_INFORMATION: 47282cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 47382cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 47482cd038dSYoshinobu Inoue = nd_opt; 47582cd038dSYoshinobu Inoue } 47682cd038dSYoshinobu Inoue ndopts->nd_opts_pi_end = 47782cd038dSYoshinobu Inoue (struct nd_opt_prefix_info *)nd_opt; 47882cd038dSYoshinobu Inoue break; 479abbe8356SBjoern A. Zeeb /* What about ND_OPT_ROUTE_INFO? RFC 4191 */ 480abbe8356SBjoern A. Zeeb case ND_OPT_RDNSS: /* RFC 6106 */ 481abbe8356SBjoern A. Zeeb case ND_OPT_DNSSL: /* RFC 6106 */ 482abbe8356SBjoern A. Zeeb /* 483abbe8356SBjoern A. Zeeb * Silently ignore options we know and do not care about 484abbe8356SBjoern A. Zeeb * in the kernel. 485abbe8356SBjoern A. Zeeb */ 486abbe8356SBjoern A. Zeeb break; 48782cd038dSYoshinobu Inoue default: 48882cd038dSYoshinobu Inoue /* 48982cd038dSYoshinobu Inoue * Unknown options must be silently ignored, 490a4641f4eSPedro F. Giffuni * to accommodate future extension to the protocol. 49182cd038dSYoshinobu Inoue */ 49233841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 49382cd038dSYoshinobu Inoue "nd6_options: unsupported option %d - " 49433841545SHajimu UMEMOTO "option ignored\n", nd_opt->nd_opt_type)); 49582cd038dSYoshinobu Inoue } 49682cd038dSYoshinobu Inoue 49782cd038dSYoshinobu Inoue skip1: 49882cd038dSYoshinobu Inoue i++; 499603724d3SBjoern A. Zeeb if (i > V_nd6_maxndopt) { 500e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_toomanyopt); 50133841545SHajimu UMEMOTO nd6log((LOG_INFO, "too many loop in nd opt\n")); 50282cd038dSYoshinobu Inoue break; 50382cd038dSYoshinobu Inoue } 50482cd038dSYoshinobu Inoue 50582cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 50682cd038dSYoshinobu Inoue break; 50782cd038dSYoshinobu Inoue } 50882cd038dSYoshinobu Inoue 50982cd038dSYoshinobu Inoue return 0; 51082cd038dSYoshinobu Inoue } 51182cd038dSYoshinobu Inoue 51282cd038dSYoshinobu Inoue /* 513743eee66SSUZUKI Shinsuke * ND6 timer routine to handle ND6 entries 51482cd038dSYoshinobu Inoue */ 5159b420b3dSAlexander V. Chernikov static void 5166e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick) 517743eee66SSUZUKI Shinsuke { 518ef8d671cSHajimu UMEMOTO int canceled; 519ef8d671cSHajimu UMEMOTO 520e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 521e6950476SBjoern A. Zeeb 522743eee66SSUZUKI Shinsuke if (tick < 0) { 5236e6b3f7cSQing Li ln->la_expire = 0; 524743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 5250447c136SAlexander V. Chernikov canceled = callout_stop(&ln->lle_timer); 526743eee66SSUZUKI Shinsuke } else { 5277d26db17SHiroki Sato ln->la_expire = time_uptime + tick / hz; 5286e6b3f7cSQing Li LLE_ADDREF(ln); 529743eee66SSUZUKI Shinsuke if (tick > INT_MAX) { 530743eee66SSUZUKI Shinsuke ln->ln_ntick = tick - INT_MAX; 5310447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, INT_MAX, 532743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 533743eee66SSUZUKI Shinsuke } else { 534743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 5350447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, tick, 536743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 537743eee66SSUZUKI Shinsuke } 538743eee66SSUZUKI Shinsuke } 5397c4676ddSRandall Stewart if (canceled > 0) 540ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 541743eee66SSUZUKI Shinsuke } 54282cd038dSYoshinobu Inoue 54326deb882SAlexander V. Chernikov /* 54426deb882SAlexander V. Chernikov * Gets source address of the first packet in hold queue 54526deb882SAlexander V. Chernikov * and stores it in @src. 54626deb882SAlexander V. Chernikov * Returns pointer to @src (if hold queue is not empty) or NULL. 54726deb882SAlexander V. Chernikov * 548c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 54926deb882SAlexander V. Chernikov */ 550c0b8aeaeSAlexander V. Chernikov static __noinline struct in6_addr * 55126deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src) 55226deb882SAlexander V. Chernikov { 55326deb882SAlexander V. Chernikov struct ip6_hdr hdr; 55426deb882SAlexander V. Chernikov struct mbuf *m; 55526deb882SAlexander V. Chernikov 55626deb882SAlexander V. Chernikov if (ln->la_hold == NULL) 55726deb882SAlexander V. Chernikov return (NULL); 55826deb882SAlexander V. Chernikov 55926deb882SAlexander V. Chernikov /* 56026deb882SAlexander V. Chernikov * assume every packet in la_hold has the same IP header 56126deb882SAlexander V. Chernikov */ 56226deb882SAlexander V. Chernikov m = ln->la_hold; 56306a60e4bSAlexander V. Chernikov if (sizeof(hdr) > m->m_len) 56426deb882SAlexander V. Chernikov return (NULL); 56526deb882SAlexander V. Chernikov 56626deb882SAlexander V. Chernikov m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr); 56726deb882SAlexander V. Chernikov *src = hdr.ip6_src; 56826deb882SAlexander V. Chernikov 56926deb882SAlexander V. Chernikov return (src); 57026deb882SAlexander V. Chernikov } 57126deb882SAlexander V. Chernikov 572aa5f023eSAlexander V. Chernikov /* 57312cb7521SAlexander V. Chernikov * Checks if we need to switch from STALE state. 57412cb7521SAlexander V. Chernikov * 57512cb7521SAlexander V. Chernikov * RFC 4861 requires switching from STALE to DELAY state 57612cb7521SAlexander V. Chernikov * on first packet matching entry, waiting V_nd6_delay and 57712cb7521SAlexander V. Chernikov * transition to PROBE state (if upper layer confirmation was 57812cb7521SAlexander V. Chernikov * not received). 57912cb7521SAlexander V. Chernikov * 58012cb7521SAlexander V. Chernikov * This code performs a bit differently: 58112cb7521SAlexander V. Chernikov * On packet hit we don't change state (but desired state 58212cb7521SAlexander V. Chernikov * can be guessed by control plane). However, after V_nd6_delay 58312cb7521SAlexander V. Chernikov * seconds code will transition to PROBE state (so DELAY state 58412cb7521SAlexander V. Chernikov * is kinda skipped in most situations). 58512cb7521SAlexander V. Chernikov * 58612cb7521SAlexander V. Chernikov * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so 58712cb7521SAlexander V. Chernikov * we perform the following upon entering STALE state: 58812cb7521SAlexander V. Chernikov * 58912cb7521SAlexander V. Chernikov * 1) Arm timer to run each V_nd6_delay seconds to make sure that 59012cb7521SAlexander V. Chernikov * if packet was transmitted at the start of given interval, we 59112cb7521SAlexander V. Chernikov * would be able to switch to PROBE state in V_nd6_delay seconds 59212cb7521SAlexander V. Chernikov * as user expects. 59312cb7521SAlexander V. Chernikov * 59412cb7521SAlexander V. Chernikov * 2) Reschedule timer until original V_nd6_gctimer expires keeping 59512cb7521SAlexander V. Chernikov * lle in STALE state (remaining timer value stored in lle_remtime). 59612cb7521SAlexander V. Chernikov * 59712cb7521SAlexander V. Chernikov * 3) Reschedule timer if packet was transmitted less that V_nd6_delay 59812cb7521SAlexander V. Chernikov * seconds ago. 59912cb7521SAlexander V. Chernikov * 60012cb7521SAlexander V. Chernikov * Returns non-zero value if the entry is still STALE (storing 60112cb7521SAlexander V. Chernikov * the next timer interval in @pdelay). 60212cb7521SAlexander V. Chernikov * 60312cb7521SAlexander V. Chernikov * Returns zero value if original timer expired or we need to switch to 60412cb7521SAlexander V. Chernikov * PROBE (store that in @do_switch variable). 60512cb7521SAlexander V. Chernikov */ 60612cb7521SAlexander V. Chernikov static int 60712cb7521SAlexander V. Chernikov nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch) 60812cb7521SAlexander V. Chernikov { 60912cb7521SAlexander V. Chernikov int nd_delay, nd_gctimer, r_skip_req; 61012cb7521SAlexander V. Chernikov time_t lle_hittime; 61112cb7521SAlexander V. Chernikov long delay; 61212cb7521SAlexander V. Chernikov 61312cb7521SAlexander V. Chernikov *do_switch = 0; 61412cb7521SAlexander V. Chernikov nd_gctimer = V_nd6_gctimer; 61512cb7521SAlexander V. Chernikov nd_delay = V_nd6_delay; 61612cb7521SAlexander V. Chernikov 61712cb7521SAlexander V. Chernikov LLE_REQ_LOCK(lle); 61812cb7521SAlexander V. Chernikov r_skip_req = lle->r_skip_req; 61912cb7521SAlexander V. Chernikov lle_hittime = lle->lle_hittime; 62012cb7521SAlexander V. Chernikov LLE_REQ_UNLOCK(lle); 62112cb7521SAlexander V. Chernikov 62212cb7521SAlexander V. Chernikov if (r_skip_req > 0) { 62312cb7521SAlexander V. Chernikov 62412cb7521SAlexander V. Chernikov /* 62512cb7521SAlexander V. Chernikov * Nonzero r_skip_req value was set upon entering 62612cb7521SAlexander V. Chernikov * STALE state. Since value was not changed, no 62712cb7521SAlexander V. Chernikov * packets were passed using this lle. Ask for 62812cb7521SAlexander V. Chernikov * timer reschedule and keep STALE state. 62912cb7521SAlexander V. Chernikov */ 63012cb7521SAlexander V. Chernikov delay = (long)(MIN(nd_gctimer, nd_delay)); 63112cb7521SAlexander V. Chernikov delay *= hz; 63212cb7521SAlexander V. Chernikov if (lle->lle_remtime > delay) 63312cb7521SAlexander V. Chernikov lle->lle_remtime -= delay; 63412cb7521SAlexander V. Chernikov else { 63512cb7521SAlexander V. Chernikov delay = lle->lle_remtime; 63612cb7521SAlexander V. Chernikov lle->lle_remtime = 0; 63712cb7521SAlexander V. Chernikov } 63812cb7521SAlexander V. Chernikov 63912cb7521SAlexander V. Chernikov if (delay == 0) { 64012cb7521SAlexander V. Chernikov 64112cb7521SAlexander V. Chernikov /* 64212cb7521SAlexander V. Chernikov * The original ng6_gctime timeout ended, 64312cb7521SAlexander V. Chernikov * no more rescheduling. 64412cb7521SAlexander V. Chernikov */ 64512cb7521SAlexander V. Chernikov return (0); 64612cb7521SAlexander V. Chernikov } 64712cb7521SAlexander V. Chernikov 64812cb7521SAlexander V. Chernikov *pdelay = delay; 64912cb7521SAlexander V. Chernikov return (1); 65012cb7521SAlexander V. Chernikov } 65112cb7521SAlexander V. Chernikov 65212cb7521SAlexander V. Chernikov /* 65312cb7521SAlexander V. Chernikov * Packet received. Verify timestamp 65412cb7521SAlexander V. Chernikov */ 65512cb7521SAlexander V. Chernikov delay = (long)(time_uptime - lle_hittime); 65612cb7521SAlexander V. Chernikov if (delay < nd_delay) { 65712cb7521SAlexander V. Chernikov 65812cb7521SAlexander V. Chernikov /* 65912cb7521SAlexander V. Chernikov * V_nd6_delay still not passed since the first 66012cb7521SAlexander V. Chernikov * hit in STALE state. 66112cb7521SAlexander V. Chernikov * Reshedule timer and return. 66212cb7521SAlexander V. Chernikov */ 66312cb7521SAlexander V. Chernikov *pdelay = (long)(nd_delay - delay) * hz; 66412cb7521SAlexander V. Chernikov return (1); 66512cb7521SAlexander V. Chernikov } 66612cb7521SAlexander V. Chernikov 66712cb7521SAlexander V. Chernikov /* Request switching to probe */ 66812cb7521SAlexander V. Chernikov *do_switch = 1; 66912cb7521SAlexander V. Chernikov return (0); 67012cb7521SAlexander V. Chernikov } 67112cb7521SAlexander V. Chernikov 67212cb7521SAlexander V. Chernikov 67312cb7521SAlexander V. Chernikov /* 674aa5f023eSAlexander V. Chernikov * Switch @lle state to new state optionally arming timers. 675c0b8aeaeSAlexander V. Chernikov * 676c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 677aa5f023eSAlexander V. Chernikov */ 678c0b8aeaeSAlexander V. Chernikov __noinline void 679aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(struct llentry *lle, int newstate) 680aa5f023eSAlexander V. Chernikov { 681aa5f023eSAlexander V. Chernikov struct ifnet *ifp; 68212cb7521SAlexander V. Chernikov int nd_gctimer, nd_delay; 68312cb7521SAlexander V. Chernikov long delay, remtime; 684aa5f023eSAlexander V. Chernikov 685aa5f023eSAlexander V. Chernikov delay = 0; 68612cb7521SAlexander V. Chernikov remtime = 0; 687aa5f023eSAlexander V. Chernikov 688aa5f023eSAlexander V. Chernikov switch (newstate) { 689aa5f023eSAlexander V. Chernikov case ND6_LLINFO_INCOMPLETE: 690aa5f023eSAlexander V. Chernikov ifp = lle->lle_tbl->llt_ifp; 691aa5f023eSAlexander V. Chernikov delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000; 692aa5f023eSAlexander V. Chernikov break; 693aa5f023eSAlexander V. Chernikov case ND6_LLINFO_REACHABLE: 694aa5f023eSAlexander V. Chernikov if (!ND6_LLINFO_PERMANENT(lle)) { 695aa5f023eSAlexander V. Chernikov ifp = lle->lle_tbl->llt_ifp; 696aa5f023eSAlexander V. Chernikov delay = (long)ND_IFINFO(ifp)->reachable * hz; 697aa5f023eSAlexander V. Chernikov } 698aa5f023eSAlexander V. Chernikov break; 699aa5f023eSAlexander V. Chernikov case ND6_LLINFO_STALE: 70012cb7521SAlexander V. Chernikov 70112cb7521SAlexander V. Chernikov /* 70212cb7521SAlexander V. Chernikov * Notify fast path that we want to know if any packet 70312cb7521SAlexander V. Chernikov * is transmitted by setting r_skip_req. 70412cb7521SAlexander V. Chernikov */ 70512cb7521SAlexander V. Chernikov LLE_REQ_LOCK(lle); 70612cb7521SAlexander V. Chernikov lle->r_skip_req = 1; 70712cb7521SAlexander V. Chernikov LLE_REQ_UNLOCK(lle); 70812cb7521SAlexander V. Chernikov nd_delay = V_nd6_delay; 70912cb7521SAlexander V. Chernikov nd_gctimer = V_nd6_gctimer; 71012cb7521SAlexander V. Chernikov 71112cb7521SAlexander V. Chernikov delay = (long)(MIN(nd_gctimer, nd_delay)) * hz; 71212cb7521SAlexander V. Chernikov remtime = (long)nd_gctimer * hz - delay; 713aa5f023eSAlexander V. Chernikov break; 714aa5f023eSAlexander V. Chernikov case ND6_LLINFO_DELAY: 715aa5f023eSAlexander V. Chernikov lle->la_asked = 0; 716aa5f023eSAlexander V. Chernikov delay = (long)V_nd6_delay * hz; 717aa5f023eSAlexander V. Chernikov break; 718aa5f023eSAlexander V. Chernikov } 719aa5f023eSAlexander V. Chernikov 720aa5f023eSAlexander V. Chernikov if (delay > 0) 721aa5f023eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, delay); 722aa5f023eSAlexander V. Chernikov 72312cb7521SAlexander V. Chernikov lle->lle_remtime = remtime; 724aa5f023eSAlexander V. Chernikov lle->ln_state = newstate; 725aa5f023eSAlexander V. Chernikov } 726aa5f023eSAlexander V. Chernikov 727c0b8aeaeSAlexander V. Chernikov /* 728c0b8aeaeSAlexander V. Chernikov * Timer-dependent part of nd state machine. 729c0b8aeaeSAlexander V. Chernikov * 730c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 731c0b8aeaeSAlexander V. Chernikov */ 732c0b8aeaeSAlexander V. Chernikov static __noinline void 7331272577eSXin LI nd6_llinfo_timer(void *arg) 734743eee66SSUZUKI Shinsuke { 735b8a6e03fSGleb Smirnoff struct epoch_tracker et; 7366e6b3f7cSQing Li struct llentry *ln; 73726deb882SAlexander V. Chernikov struct in6_addr *dst, *pdst, *psrc, src; 738743eee66SSUZUKI Shinsuke struct ifnet *ifp; 739435bece4SMark Johnston struct nd_ifinfo *ndi; 74012cb7521SAlexander V. Chernikov int do_switch, send_ns; 74112cb7521SAlexander V. Chernikov long delay; 74282cd038dSYoshinobu Inoue 74319291ab3SBjoern A. Zeeb KASSERT(arg != NULL, ("%s: arg NULL", __func__)); 7446e6b3f7cSQing Li ln = (struct llentry *)arg; 745435bece4SMark Johnston ifp = lltable_get_ifp(ln->lle_tbl); 746435bece4SMark Johnston CURVNET_SET(ifp->if_vnet); 747435bece4SMark Johnston 748435bece4SMark Johnston ND6_RLOCK(); 7492575fbb8SRandall Stewart LLE_WLOCK(ln); 7500447c136SAlexander V. Chernikov if (callout_pending(&ln->lle_timer)) { 7512575fbb8SRandall Stewart /* 7522575fbb8SRandall Stewart * Here we are a bit odd here in the treatment of 7532575fbb8SRandall Stewart * active/pending. If the pending bit is set, it got 7542575fbb8SRandall Stewart * rescheduled before I ran. The active 7552575fbb8SRandall Stewart * bit we ignore, since if it was stopped 7562575fbb8SRandall Stewart * in ll_tablefree() and was currently running 7572575fbb8SRandall Stewart * it would have return 0 so the code would 7582575fbb8SRandall Stewart * not have deleted it since the callout could 7592575fbb8SRandall Stewart * not be stopped so we want to go through 7602575fbb8SRandall Stewart * with the delete here now. If the callout 7612575fbb8SRandall Stewart * was restarted, the pending bit will be back on and 7622575fbb8SRandall Stewart * we just want to bail since the callout_reset would 7632575fbb8SRandall Stewart * return 1 and our reference would have been removed 7642575fbb8SRandall Stewart * by nd6_llinfo_settimer_locked above since canceled 7652575fbb8SRandall Stewart * would have been 1. 7662575fbb8SRandall Stewart */ 7672575fbb8SRandall Stewart LLE_WUNLOCK(ln); 768435bece4SMark Johnston ND6_RUNLOCK(); 769435bece4SMark Johnston CURVNET_RESTORE(); 7702575fbb8SRandall Stewart return; 7712575fbb8SRandall Stewart } 772b8a6e03fSGleb Smirnoff NET_EPOCH_ENTER(et); 77326deb882SAlexander V. Chernikov ndi = ND_IFINFO(ifp); 77426deb882SAlexander V. Chernikov send_ns = 0; 77526deb882SAlexander V. Chernikov dst = &ln->r_l3addr.addr6; 77626deb882SAlexander V. Chernikov pdst = dst; 77782cd038dSYoshinobu Inoue 778743eee66SSUZUKI Shinsuke if (ln->ln_ntick > 0) { 779743eee66SSUZUKI Shinsuke if (ln->ln_ntick > INT_MAX) { 780743eee66SSUZUKI Shinsuke ln->ln_ntick -= INT_MAX; 781e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, INT_MAX); 782743eee66SSUZUKI Shinsuke } else { 783743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 784e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, ln->ln_ntick); 78582cd038dSYoshinobu Inoue } 7866e6b3f7cSQing Li goto done; 787743eee66SSUZUKI Shinsuke } 788743eee66SSUZUKI Shinsuke 789287e3cb4SHajimu UMEMOTO if (ln->la_flags & LLE_STATIC) { 7906e6b3f7cSQing Li goto done; 7916e6b3f7cSQing Li } 79282cd038dSYoshinobu Inoue 7936e6b3f7cSQing Li if (ln->la_flags & LLE_DELETED) { 794435bece4SMark Johnston nd6_free(&ln, 0); 7956e6b3f7cSQing Li goto done; 7966e6b3f7cSQing Li } 79782cd038dSYoshinobu Inoue 79882cd038dSYoshinobu Inoue switch (ln->ln_state) { 79982cd038dSYoshinobu Inoue case ND6_LLINFO_INCOMPLETE: 8006e6b3f7cSQing Li if (ln->la_asked < V_nd6_mmaxtries) { 8016e6b3f7cSQing Li ln->la_asked++; 80226deb882SAlexander V. Chernikov send_ns = 1; 80326deb882SAlexander V. Chernikov /* Send NS to multicast address */ 80426deb882SAlexander V. Chernikov pdst = NULL; 80582cd038dSYoshinobu Inoue } else { 8066e6b3f7cSQing Li struct mbuf *m = ln->la_hold; 80782cd038dSYoshinobu Inoue if (m) { 80831d4137bSSUZUKI Shinsuke struct mbuf *m0; 80931d4137bSSUZUKI Shinsuke 81082cd038dSYoshinobu Inoue /* 8116e6b3f7cSQing Li * assuming every packet in la_hold has the 812e6950476SBjoern A. Zeeb * same IP header. Send error after unlock. 81382cd038dSYoshinobu Inoue */ 81431d4137bSSUZUKI Shinsuke m0 = m->m_nextpkt; 81531d4137bSSUZUKI Shinsuke m->m_nextpkt = NULL; 8166e6b3f7cSQing Li ln->la_hold = m0; 81731d4137bSSUZUKI Shinsuke clear_llinfo_pqueue(ln); 81882cd038dSYoshinobu Inoue } 819435bece4SMark Johnston nd6_free(&ln, 0); 820e6950476SBjoern A. Zeeb if (m != NULL) 821e6950476SBjoern A. Zeeb icmp6_error2(m, ICMP6_DST_UNREACH, 822e6950476SBjoern A. Zeeb ICMP6_DST_UNREACH_ADDR, 0, ifp); 82382cd038dSYoshinobu Inoue } 82482cd038dSYoshinobu Inoue break; 82582cd038dSYoshinobu Inoue case ND6_LLINFO_REACHABLE: 826aa5f023eSAlexander V. Chernikov if (!ND6_LLINFO_PERMANENT(ln)) 827aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); 82882cd038dSYoshinobu Inoue break; 82933841545SHajimu UMEMOTO 83033841545SHajimu UMEMOTO case ND6_LLINFO_STALE: 83112cb7521SAlexander V. Chernikov if (nd6_is_stale(ln, &delay, &do_switch) != 0) { 83212cb7521SAlexander V. Chernikov 83312cb7521SAlexander V. Chernikov /* 83412cb7521SAlexander V. Chernikov * No packet has used this entry and GC timeout 83512cb7521SAlexander V. Chernikov * has not been passed. Reshedule timer and 83612cb7521SAlexander V. Chernikov * return. 83712cb7521SAlexander V. Chernikov */ 83812cb7521SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, delay); 83912cb7521SAlexander V. Chernikov break; 84012cb7521SAlexander V. Chernikov } 84112cb7521SAlexander V. Chernikov 84212cb7521SAlexander V. Chernikov if (do_switch == 0) { 84312cb7521SAlexander V. Chernikov 84412cb7521SAlexander V. Chernikov /* 84512cb7521SAlexander V. Chernikov * GC timer has ended and entry hasn't been used. 84612cb7521SAlexander V. Chernikov * Run Garbage collector (RFC 4861, 5.3) 84712cb7521SAlexander V. Chernikov */ 848435bece4SMark Johnston if (!ND6_LLINFO_PERMANENT(ln)) 849435bece4SMark Johnston nd6_free(&ln, 1); 85033841545SHajimu UMEMOTO break; 85112cb7521SAlexander V. Chernikov } 85212cb7521SAlexander V. Chernikov 85312cb7521SAlexander V. Chernikov /* Entry has been used AND delay timer has ended. */ 85412cb7521SAlexander V. Chernikov 85512cb7521SAlexander V. Chernikov /* FALLTHROUGH */ 85633841545SHajimu UMEMOTO 85782cd038dSYoshinobu Inoue case ND6_LLINFO_DELAY: 858686cdd19SJun-ichiro itojun Hagino if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) { 859686cdd19SJun-ichiro itojun Hagino /* We need NUD */ 8606e6b3f7cSQing Li ln->la_asked = 1; 861aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE); 86226deb882SAlexander V. Chernikov send_ns = 1; 863aa5f023eSAlexander V. Chernikov } else 864aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */ 86582cd038dSYoshinobu Inoue break; 86682cd038dSYoshinobu Inoue case ND6_LLINFO_PROBE: 8676e6b3f7cSQing Li if (ln->la_asked < V_nd6_umaxtries) { 8686e6b3f7cSQing Li ln->la_asked++; 86926deb882SAlexander V. Chernikov send_ns = 1; 87082cd038dSYoshinobu Inoue } else { 871435bece4SMark Johnston nd6_free(&ln, 0); 87282cd038dSYoshinobu Inoue } 87382cd038dSYoshinobu Inoue break; 874e6950476SBjoern A. Zeeb default: 875e6950476SBjoern A. Zeeb panic("%s: paths in a dark night can be confusing: %d", 876e6950476SBjoern A. Zeeb __func__, ln->ln_state); 87782cd038dSYoshinobu Inoue } 8786e6b3f7cSQing Li done: 879435bece4SMark Johnston if (ln != NULL) 880435bece4SMark Johnston ND6_RUNLOCK(); 88126deb882SAlexander V. Chernikov if (send_ns != 0) { 88226deb882SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000); 88326deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(ln, &src); 88426deb882SAlexander V. Chernikov LLE_FREE_LOCKED(ln); 88526deb882SAlexander V. Chernikov ln = NULL; 88626deb882SAlexander V. Chernikov nd6_ns_output(ifp, psrc, pdst, dst, NULL); 88726deb882SAlexander V. Chernikov } 88826deb882SAlexander V. Chernikov 8896e6b3f7cSQing Li if (ln != NULL) 890e6950476SBjoern A. Zeeb LLE_FREE_LOCKED(ln); 891b8a6e03fSGleb Smirnoff NET_EPOCH_EXIT(et); 892f0c0b143SHajimu UMEMOTO CURVNET_RESTORE(); 89382cd038dSYoshinobu Inoue } 89482cd038dSYoshinobu Inoue 895743eee66SSUZUKI Shinsuke 896743eee66SSUZUKI Shinsuke /* 897743eee66SSUZUKI Shinsuke * ND6 timer routine to expire default route list and prefix list 898743eee66SSUZUKI Shinsuke */ 899743eee66SSUZUKI Shinsuke void 9008b615593SMarko Zec nd6_timer(void *arg) 901743eee66SSUZUKI Shinsuke { 90221ca7b57SMarko Zec CURVNET_SET((struct vnet *) arg); 903b8a6e03fSGleb Smirnoff struct epoch_tracker et; 9044de485feSMark Johnston struct nd_drhead drq; 905d748f7efSMark Johnston struct nd_prhead prl; 9063b0b2840SJohn Baldwin struct nd_defrouter *dr, *ndr; 9073b0b2840SJohn Baldwin struct nd_prefix *pr, *npr; 908ca1163bdSMark Johnston struct ifnet *ifp; 909743eee66SSUZUKI Shinsuke struct in6_ifaddr *ia6, *nia6; 9108cd3b204SMark Johnston uint64_t genid; 911743eee66SSUZUKI Shinsuke 9124de485feSMark Johnston TAILQ_INIT(&drq); 913d748f7efSMark Johnston LIST_INIT(&prl); 9144de485feSMark Johnston 9154de485feSMark Johnston ND6_WLOCK(); 9164de485feSMark Johnston TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) 9177d26db17SHiroki Sato if (dr->expire && dr->expire < time_uptime) 9184de485feSMark Johnston defrouter_unlink(dr, &drq); 9194de485feSMark Johnston ND6_WUNLOCK(); 9204de485feSMark Johnston 921*d6dbfed8SGleb Smirnoff NET_EPOCH_ENTER(et); 9224de485feSMark Johnston while ((dr = TAILQ_FIRST(&drq)) != NULL) { 9234de485feSMark Johnston TAILQ_REMOVE(&drq, dr, dr_entry); 9244de485feSMark Johnston defrouter_del(dr); 925686cdd19SJun-ichiro itojun Hagino } 92682cd038dSYoshinobu Inoue 92733841545SHajimu UMEMOTO /* 92833841545SHajimu UMEMOTO * expire interface addresses. 92933841545SHajimu UMEMOTO * in the past the loop was inside prefix expiry processing. 93033841545SHajimu UMEMOTO * However, from a stricter speci-confrmance standpoint, we should 93133841545SHajimu UMEMOTO * rather separate address lifetimes and prefix lifetimes. 932d1da0a06SRobert Watson * 933d1da0a06SRobert Watson * XXXRW: in6_ifaddrhead locking. 93433841545SHajimu UMEMOTO */ 93533841545SHajimu UMEMOTO addrloop: 936d7c5a620SMatt Macy CK_STAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) { 93782cd038dSYoshinobu Inoue /* check address lifetime */ 93833841545SHajimu UMEMOTO if (IFA6_IS_INVALID(ia6)) { 93933841545SHajimu UMEMOTO int regen = 0; 94033841545SHajimu UMEMOTO 94133841545SHajimu UMEMOTO /* 94233841545SHajimu UMEMOTO * If the expiring address is temporary, try 94333841545SHajimu UMEMOTO * regenerating a new one. This would be useful when 94488ff5695SSUZUKI Shinsuke * we suspended a laptop PC, then turned it on after a 94533841545SHajimu UMEMOTO * period that could invalidate all temporary 94633841545SHajimu UMEMOTO * addresses. Although we may have to restart the 94733841545SHajimu UMEMOTO * loop (see below), it must be after purging the 94833841545SHajimu UMEMOTO * address. Otherwise, we'd see an infinite loop of 94933841545SHajimu UMEMOTO * regeneration. 95033841545SHajimu UMEMOTO */ 951603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 95233841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) { 95333841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) 95433841545SHajimu UMEMOTO regen = 1; 95533841545SHajimu UMEMOTO } 95633841545SHajimu UMEMOTO 95733841545SHajimu UMEMOTO in6_purgeaddr(&ia6->ia_ifa); 95833841545SHajimu UMEMOTO 95933841545SHajimu UMEMOTO if (regen) 96033841545SHajimu UMEMOTO goto addrloop; /* XXX: see below */ 96143068328SHajimu UMEMOTO } else if (IFA6_IS_DEPRECATED(ia6)) { 96233841545SHajimu UMEMOTO int oldflags = ia6->ia6_flags; 96333841545SHajimu UMEMOTO 96482cd038dSYoshinobu Inoue ia6->ia6_flags |= IN6_IFF_DEPRECATED; 96533841545SHajimu UMEMOTO 96633841545SHajimu UMEMOTO /* 96733841545SHajimu UMEMOTO * If a temporary address has just become deprecated, 96833841545SHajimu UMEMOTO * regenerate a new one if possible. 96933841545SHajimu UMEMOTO */ 970603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 97133841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 97233841545SHajimu UMEMOTO (oldflags & IN6_IFF_DEPRECATED) == 0) { 97333841545SHajimu UMEMOTO 97433841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) { 97533841545SHajimu UMEMOTO /* 97633841545SHajimu UMEMOTO * A new temporary address is 97733841545SHajimu UMEMOTO * generated. 97833841545SHajimu UMEMOTO * XXX: this means the address chain 97933841545SHajimu UMEMOTO * has changed while we are still in 98033841545SHajimu UMEMOTO * the loop. Although the change 98133841545SHajimu UMEMOTO * would not cause disaster (because 98288ff5695SSUZUKI Shinsuke * it's not a deletion, but an 98388ff5695SSUZUKI Shinsuke * addition,) we'd rather restart the 98433841545SHajimu UMEMOTO * loop just for safety. Or does this 98533841545SHajimu UMEMOTO * significantly reduce performance?? 98633841545SHajimu UMEMOTO */ 98733841545SHajimu UMEMOTO goto addrloop; 98833841545SHajimu UMEMOTO } 98933841545SHajimu UMEMOTO } 9906401c828SHiroki Sato } else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) { 9916401c828SHiroki Sato /* 9926401c828SHiroki Sato * Schedule DAD for a tentative address. This happens 9936401c828SHiroki Sato * if the interface was down or not running 9946401c828SHiroki Sato * when the address was configured. 9956401c828SHiroki Sato */ 9966401c828SHiroki Sato int delay; 9976401c828SHiroki Sato 9986401c828SHiroki Sato delay = arc4random() % 9996401c828SHiroki Sato (MAX_RTR_SOLICITATION_DELAY * hz); 10006401c828SHiroki Sato nd6_dad_start((struct ifaddr *)ia6, delay); 100183649f07SHajimu UMEMOTO } else { 100233841545SHajimu UMEMOTO /* 10036401c828SHiroki Sato * Check status of the interface. If it is down, 10046401c828SHiroki Sato * mark the address as tentative for future DAD. 10056401c828SHiroki Sato */ 1006ca1163bdSMark Johnston ifp = ia6->ia_ifp; 1007ca1163bdSMark Johnston if ((ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0 && 1008ca1163bdSMark Johnston ((ifp->if_flags & IFF_UP) == 0 || 1009ca1163bdSMark Johnston (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1010ca1163bdSMark Johnston (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) != 0)){ 10116401c828SHiroki Sato ia6->ia6_flags &= ~IN6_IFF_DUPLICATED; 10126401c828SHiroki Sato ia6->ia6_flags |= IN6_IFF_TENTATIVE; 10136401c828SHiroki Sato } 1014ca1163bdSMark Johnston 10156401c828SHiroki Sato /* 101633841545SHajimu UMEMOTO * A new RA might have made a deprecated address 101733841545SHajimu UMEMOTO * preferred. 101833841545SHajimu UMEMOTO */ 101933841545SHajimu UMEMOTO ia6->ia6_flags &= ~IN6_IFF_DEPRECATED; 102082cd038dSYoshinobu Inoue } 102182cd038dSYoshinobu Inoue } 1022b8a6e03fSGleb Smirnoff NET_EPOCH_EXIT(et); 102382cd038dSYoshinobu Inoue 1024d748f7efSMark Johnston ND6_WLOCK(); 1025d748f7efSMark Johnston restart: 10263b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 102782cd038dSYoshinobu Inoue /* 1028d748f7efSMark Johnston * Expire prefixes. Since the pltime is only used for 1029d748f7efSMark Johnston * autoconfigured addresses, pltime processing for prefixes is 1030d748f7efSMark Johnston * not necessary. 1031d748f7efSMark Johnston * 1032d748f7efSMark Johnston * Only unlink after all derived addresses have expired. This 1033d748f7efSMark Johnston * may not occur until two hours after the prefix has expired 1034d748f7efSMark Johnston * per RFC 4862. If the prefix expires before its derived 1035d748f7efSMark Johnston * addresses, mark it off-link. This will be done automatically 1036d748f7efSMark Johnston * after unlinking if no address references remain. 103782cd038dSYoshinobu Inoue */ 1038d748f7efSMark Johnston if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME || 1039d748f7efSMark Johnston time_uptime - pr->ndpr_lastupdate <= pr->ndpr_vltime) 1040d748f7efSMark Johnston continue; 104182cd038dSYoshinobu Inoue 1042d748f7efSMark Johnston if (pr->ndpr_addrcnt == 0) { 1043d748f7efSMark Johnston nd6_prefix_unlink(pr, &prl); 1044d748f7efSMark Johnston continue; 10453b0b2840SJohn Baldwin } 1046d748f7efSMark Johnston if ((pr->ndpr_stateflags & NDPRF_ONLINK) != 0) { 10478cd3b204SMark Johnston genid = V_nd6_list_genid; 10488cd3b204SMark Johnston nd6_prefix_ref(pr); 1049d748f7efSMark Johnston ND6_WUNLOCK(); 1050d748f7efSMark Johnston ND6_ONLINK_LOCK(); 10518cd3b204SMark Johnston (void)nd6_prefix_offlink(pr); 10528cd3b204SMark Johnston ND6_ONLINK_UNLOCK(); 1053d748f7efSMark Johnston ND6_WLOCK(); 10548cd3b204SMark Johnston nd6_prefix_rele(pr); 10558cd3b204SMark Johnston if (genid != V_nd6_list_genid) 1056d748f7efSMark Johnston goto restart; 1057d748f7efSMark Johnston } 1058d748f7efSMark Johnston } 1059d748f7efSMark Johnston ND6_WUNLOCK(); 1060d748f7efSMark Johnston 1061d748f7efSMark Johnston while ((pr = LIST_FIRST(&prl)) != NULL) { 1062d748f7efSMark Johnston LIST_REMOVE(pr, ndpr_entry); 1063d748f7efSMark Johnston nd6_prefix_del(pr); 106482cd038dSYoshinobu Inoue } 106599a0c406SBjoern A. Zeeb 106699a0c406SBjoern A. Zeeb callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz, 106799a0c406SBjoern A. Zeeb nd6_timer, curvnet); 106899a0c406SBjoern A. Zeeb 10698b615593SMarko Zec CURVNET_RESTORE(); 107082cd038dSYoshinobu Inoue } 107182cd038dSYoshinobu Inoue 10721272577eSXin LI /* 10731272577eSXin LI * ia6 - deprecated/invalidated temporary address 10741272577eSXin LI */ 107533841545SHajimu UMEMOTO static int 10761272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6) 107733841545SHajimu UMEMOTO { 107833841545SHajimu UMEMOTO struct ifaddr *ifa; 107933841545SHajimu UMEMOTO struct ifnet *ifp; 108033841545SHajimu UMEMOTO struct in6_ifaddr *public_ifa6 = NULL; 108133841545SHajimu UMEMOTO 1082b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 1083b8a6e03fSGleb Smirnoff 108433841545SHajimu UMEMOTO ifp = ia6->ia_ifa.ifa_ifp; 1085d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 108633841545SHajimu UMEMOTO struct in6_ifaddr *it6; 108733841545SHajimu UMEMOTO 108833841545SHajimu UMEMOTO if (ifa->ifa_addr->sa_family != AF_INET6) 108933841545SHajimu UMEMOTO continue; 109033841545SHajimu UMEMOTO 109133841545SHajimu UMEMOTO it6 = (struct in6_ifaddr *)ifa; 109233841545SHajimu UMEMOTO 109333841545SHajimu UMEMOTO /* ignore no autoconf addresses. */ 109433841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0) 109533841545SHajimu UMEMOTO continue; 109633841545SHajimu UMEMOTO 109733841545SHajimu UMEMOTO /* ignore autoconf addresses with different prefixes. */ 109833841545SHajimu UMEMOTO if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr) 109933841545SHajimu UMEMOTO continue; 110033841545SHajimu UMEMOTO 110133841545SHajimu UMEMOTO /* 110233841545SHajimu UMEMOTO * Now we are looking at an autoconf address with the same 110333841545SHajimu UMEMOTO * prefix as ours. If the address is temporary and is still 110433841545SHajimu UMEMOTO * preferred, do not create another one. It would be rare, but 110533841545SHajimu UMEMOTO * could happen, for example, when we resume a laptop PC after 110633841545SHajimu UMEMOTO * a long period. 110733841545SHajimu UMEMOTO */ 110833841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 110933841545SHajimu UMEMOTO !IFA6_IS_DEPRECATED(it6)) { 111033841545SHajimu UMEMOTO public_ifa6 = NULL; 111133841545SHajimu UMEMOTO break; 111233841545SHajimu UMEMOTO } 111333841545SHajimu UMEMOTO 111433841545SHajimu UMEMOTO /* 111533841545SHajimu UMEMOTO * This is a public autoconf address that has the same prefix 111633841545SHajimu UMEMOTO * as ours. If it is preferred, keep it. We can't break the 111733841545SHajimu UMEMOTO * loop here, because there may be a still-preferred temporary 111833841545SHajimu UMEMOTO * address with the prefix. 111933841545SHajimu UMEMOTO */ 112033841545SHajimu UMEMOTO if (!IFA6_IS_DEPRECATED(it6)) 112133841545SHajimu UMEMOTO public_ifa6 = it6; 1122dff78447SMark Johnston } 1123c1752bcdSQing Li if (public_ifa6 != NULL) 1124c1752bcdSQing Li ifa_ref(&public_ifa6->ia_ifa); 112533841545SHajimu UMEMOTO 112633841545SHajimu UMEMOTO if (public_ifa6 != NULL) { 112733841545SHajimu UMEMOTO int e; 112833841545SHajimu UMEMOTO 1129743eee66SSUZUKI Shinsuke if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) { 1130c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 113133841545SHajimu UMEMOTO log(LOG_NOTICE, "regen_tmpaddr: failed to create a new" 113233841545SHajimu UMEMOTO " tmp addr,errno=%d\n", e); 113333841545SHajimu UMEMOTO return (-1); 113433841545SHajimu UMEMOTO } 1135c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 113633841545SHajimu UMEMOTO return (0); 113733841545SHajimu UMEMOTO } 113833841545SHajimu UMEMOTO 113933841545SHajimu UMEMOTO return (-1); 114033841545SHajimu UMEMOTO } 114133841545SHajimu UMEMOTO 1142686cdd19SJun-ichiro itojun Hagino /* 1143df890b8eSMark Johnston * Remove prefix and default router list entries corresponding to ifp. Neighbor 1144df890b8eSMark Johnston * cache entries are freed in in6_domifdetach(). 1145686cdd19SJun-ichiro itojun Hagino */ 1146686cdd19SJun-ichiro itojun Hagino void 11471272577eSXin LI nd6_purge(struct ifnet *ifp) 1148686cdd19SJun-ichiro itojun Hagino { 11494de485feSMark Johnston struct nd_drhead drq; 1150d748f7efSMark Johnston struct nd_prhead prl; 1151743eee66SSUZUKI Shinsuke struct nd_defrouter *dr, *ndr; 1152686cdd19SJun-ichiro itojun Hagino struct nd_prefix *pr, *npr; 1153686cdd19SJun-ichiro itojun Hagino 11544de485feSMark Johnston TAILQ_INIT(&drq); 1155d748f7efSMark Johnston LIST_INIT(&prl); 11564de485feSMark Johnston 1157686cdd19SJun-ichiro itojun Hagino /* 1158743eee66SSUZUKI Shinsuke * Nuke default router list entries toward ifp. 1159743eee66SSUZUKI Shinsuke * We defer removal of default router list entries that is installed 1160743eee66SSUZUKI Shinsuke * in the routing table, in order to keep additional side effects as 1161743eee66SSUZUKI Shinsuke * small as possible. 1162686cdd19SJun-ichiro itojun Hagino */ 11634de485feSMark Johnston ND6_WLOCK(); 11643b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 1165743eee66SSUZUKI Shinsuke if (dr->installed) 1166743eee66SSUZUKI Shinsuke continue; 1167686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 11684de485feSMark Johnston defrouter_unlink(dr, &drq); 1169686cdd19SJun-ichiro itojun Hagino } 11703b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 1171743eee66SSUZUKI Shinsuke if (!dr->installed) 1172743eee66SSUZUKI Shinsuke continue; 1173686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 11744de485feSMark Johnston defrouter_unlink(dr, &drq); 11754de485feSMark Johnston } 1176d748f7efSMark Johnston 1177d748f7efSMark Johnston /* 1178d748f7efSMark Johnston * Remove prefixes on ifp. We should have already removed addresses on 1179d748f7efSMark Johnston * this interface, so no addresses should be referencing these prefixes. 1180d748f7efSMark Johnston */ 1181d748f7efSMark Johnston LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 1182d748f7efSMark Johnston if (pr->ndpr_ifp == ifp) 1183d748f7efSMark Johnston nd6_prefix_unlink(pr, &prl); 1184d748f7efSMark Johnston } 11854de485feSMark Johnston ND6_WUNLOCK(); 11864de485feSMark Johnston 1187d748f7efSMark Johnston /* Delete the unlinked router and prefix objects. */ 11884de485feSMark Johnston while ((dr = TAILQ_FIRST(&drq)) != NULL) { 11894de485feSMark Johnston TAILQ_REMOVE(&drq, dr, dr_entry); 11904de485feSMark Johnston defrouter_del(dr); 1191686cdd19SJun-ichiro itojun Hagino } 1192d748f7efSMark Johnston while ((pr = LIST_FIRST(&prl)) != NULL) { 1193d748f7efSMark Johnston LIST_REMOVE(pr, ndpr_entry); 1194d748f7efSMark Johnston nd6_prefix_del(pr); 1195686cdd19SJun-ichiro itojun Hagino } 1196686cdd19SJun-ichiro itojun Hagino 1197686cdd19SJun-ichiro itojun Hagino /* cancel default outgoing interface setting */ 1198603724d3SBjoern A. Zeeb if (V_nd6_defifindex == ifp->if_index) 1199686cdd19SJun-ichiro itojun Hagino nd6_setdefaultiface(0); 1200686cdd19SJun-ichiro itojun Hagino 1201e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 1202a283298cSHiroki Sato /* Refresh default router list. */ 1203559b4296SAlan Somers defrouter_select_fib(ifp->if_fib); 12046e6b3f7cSQing Li } 12051026ccc4SHajimu UMEMOTO } 1206686cdd19SJun-ichiro itojun Hagino 1207686cdd19SJun-ichiro itojun Hagino /* 12086e6b3f7cSQing Li * the caller acquires and releases the lock on the lltbls 12096e6b3f7cSQing Li * Returns the llentry locked 1210686cdd19SJun-ichiro itojun Hagino */ 12116e6b3f7cSQing Li struct llentry * 1212f0316e1aSAlexander V. Chernikov nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp) 121382cd038dSYoshinobu Inoue { 121482cd038dSYoshinobu Inoue struct sockaddr_in6 sin6; 12156e6b3f7cSQing Li struct llentry *ln; 121682cd038dSYoshinobu Inoue 121782cd038dSYoshinobu Inoue bzero(&sin6, sizeof(sin6)); 121882cd038dSYoshinobu Inoue sin6.sin6_len = sizeof(struct sockaddr_in6); 121982cd038dSYoshinobu Inoue sin6.sin6_family = AF_INET6; 122082cd038dSYoshinobu Inoue sin6.sin6_addr = *addr6; 1221686cdd19SJun-ichiro itojun Hagino 12226e6b3f7cSQing Li IF_AFDATA_LOCK_ASSERT(ifp); 122382cd038dSYoshinobu Inoue 1224f506d933SAlexander V. Chernikov ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6); 1225b4b1367aSAlexander V. Chernikov 1226b4b1367aSAlexander V. Chernikov return (ln); 1227b4b1367aSAlexander V. Chernikov } 1228b4b1367aSAlexander V. Chernikov 1229b4b1367aSAlexander V. Chernikov struct llentry * 1230f0316e1aSAlexander V. Chernikov nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp) 1231b4b1367aSAlexander V. Chernikov { 1232b4b1367aSAlexander V. Chernikov struct sockaddr_in6 sin6; 1233b4b1367aSAlexander V. Chernikov struct llentry *ln; 1234b4b1367aSAlexander V. Chernikov 1235b4b1367aSAlexander V. Chernikov bzero(&sin6, sizeof(sin6)); 1236b4b1367aSAlexander V. Chernikov sin6.sin6_len = sizeof(struct sockaddr_in6); 1237b4b1367aSAlexander V. Chernikov sin6.sin6_family = AF_INET6; 1238b4b1367aSAlexander V. Chernikov sin6.sin6_addr = *addr6; 1239b4b1367aSAlexander V. Chernikov 12405a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6); 1241b4b1367aSAlexander V. Chernikov if (ln != NULL) 124282cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_NOSTATE; 12436e6b3f7cSQing Li 12446e6b3f7cSQing Li return (ln); 124582cd038dSYoshinobu Inoue } 124682cd038dSYoshinobu Inoue 124782cd038dSYoshinobu Inoue /* 124877b691e0SBrian Feldman * Test whether a given IPv6 address is a neighbor or not, ignoring 124977b691e0SBrian Feldman * the actual neighbor cache. The neighbor cache is ignored in order 125077b691e0SBrian Feldman * to not reenter the routing code from within itself. 125182cd038dSYoshinobu Inoue */ 125277b691e0SBrian Feldman static int 1253f0316e1aSAlexander V. Chernikov nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp) 125482cd038dSYoshinobu Inoue { 12554208ea14SHajimu UMEMOTO struct nd_prefix *pr; 1256559b4296SAlan Somers struct ifaddr *ifa; 12579a1b64d5SAlexander V. Chernikov struct rt_addrinfo info; 12589a1b64d5SAlexander V. Chernikov struct sockaddr_in6 rt_key; 1259f7d91d8cSMark Johnston const struct sockaddr *dst6; 1260d748f7efSMark Johnston uint64_t genid; 1261d748f7efSMark Johnston int error, fibnum; 126282cd038dSYoshinobu Inoue 1263686cdd19SJun-ichiro itojun Hagino /* 1264686cdd19SJun-ichiro itojun Hagino * A link-local address is always a neighbor. 12654208ea14SHajimu UMEMOTO * XXX: a link does not necessarily specify a single interface. 1266686cdd19SJun-ichiro itojun Hagino */ 1267a1f7e5f8SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) { 1268a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 sin6_copy; 1269a1f7e5f8SHajimu UMEMOTO u_int32_t zone; 1270a1f7e5f8SHajimu UMEMOTO 1271a1f7e5f8SHajimu UMEMOTO /* 1272a1f7e5f8SHajimu UMEMOTO * We need sin6_copy since sa6_recoverscope() may modify the 1273a1f7e5f8SHajimu UMEMOTO * content (XXX). 1274a1f7e5f8SHajimu UMEMOTO */ 1275a1f7e5f8SHajimu UMEMOTO sin6_copy = *addr; 1276a1f7e5f8SHajimu UMEMOTO if (sa6_recoverscope(&sin6_copy)) 1277a1f7e5f8SHajimu UMEMOTO return (0); /* XXX: should be impossible */ 1278a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone)) 1279a1f7e5f8SHajimu UMEMOTO return (0); 1280a1f7e5f8SHajimu UMEMOTO if (sin6_copy.sin6_scope_id == zone) 128182cd038dSYoshinobu Inoue return (1); 1282a1f7e5f8SHajimu UMEMOTO else 1283a1f7e5f8SHajimu UMEMOTO return (0); 1284a1f7e5f8SHajimu UMEMOTO } 128582cd038dSYoshinobu Inoue 12869a1b64d5SAlexander V. Chernikov bzero(&rt_key, sizeof(rt_key)); 12879a1b64d5SAlexander V. Chernikov bzero(&info, sizeof(info)); 12889a1b64d5SAlexander V. Chernikov info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key; 12899a1b64d5SAlexander V. Chernikov 129082cd038dSYoshinobu Inoue /* 129182cd038dSYoshinobu Inoue * If the address matches one of our addresses, 129282cd038dSYoshinobu Inoue * it should be a neighbor. 12934208ea14SHajimu UMEMOTO * If the address matches one of our on-link prefixes, it should be a 12944208ea14SHajimu UMEMOTO * neighbor. 129582cd038dSYoshinobu Inoue */ 1296d748f7efSMark Johnston ND6_RLOCK(); 1297d748f7efSMark Johnston restart: 12983b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 12994208ea14SHajimu UMEMOTO if (pr->ndpr_ifp != ifp) 13004208ea14SHajimu UMEMOTO continue; 130182cd038dSYoshinobu Inoue 1302d748f7efSMark Johnston if ((pr->ndpr_stateflags & NDPRF_ONLINK) == 0) { 1303f7d91d8cSMark Johnston dst6 = (const struct sockaddr *)&pr->ndpr_prefix; 13049a1b64d5SAlexander V. Chernikov 1305559b4296SAlan Somers /* 1306559b4296SAlan Somers * We only need to check all FIBs if add_addr_allfibs 1307559b4296SAlan Somers * is unset. If set, checking any FIB will suffice. 1308559b4296SAlan Somers */ 1309559b4296SAlan Somers fibnum = V_rt_add_addr_allfibs ? rt_numfibs - 1 : 0; 1310559b4296SAlan Somers for (; fibnum < rt_numfibs; fibnum++) { 1311d748f7efSMark Johnston genid = V_nd6_list_genid; 1312d748f7efSMark Johnston ND6_RUNLOCK(); 1313d748f7efSMark Johnston 1314559b4296SAlan Somers /* 1315559b4296SAlan Somers * Restore length field before 1316559b4296SAlan Somers * retrying lookup 1317559b4296SAlan Somers */ 13189a1b64d5SAlexander V. Chernikov rt_key.sin6_len = sizeof(rt_key); 1319559b4296SAlan Somers error = rib_lookup_info(fibnum, dst6, 0, 0, 1320559b4296SAlan Somers &info); 1321d748f7efSMark Johnston 1322d748f7efSMark Johnston ND6_RLOCK(); 1323d748f7efSMark Johnston if (genid != V_nd6_list_genid) 1324d748f7efSMark Johnston goto restart; 1325559b4296SAlan Somers if (error == 0) 1326559b4296SAlan Somers break; 1327559b4296SAlan Somers } 1328d748f7efSMark Johnston if (error != 0) 13294208ea14SHajimu UMEMOTO continue; 1330d748f7efSMark Johnston 1331baf7c373SQing Li /* 1332baf7c373SQing Li * This is the case where multiple interfaces 1333baf7c373SQing Li * have the same prefix, but only one is installed 1334baf7c373SQing Li * into the routing table and that prefix entry 1335baf7c373SQing Li * is not the one being examined here. In the case 1336baf7c373SQing Li * where RADIX_MPATH is enabled, multiple route 1337baf7c373SQing Li * entries (of the same rt_key value) will be 1338baf7c373SQing Li * installed because the interface addresses all 1339baf7c373SQing Li * differ. 1340baf7c373SQing Li */ 1341baf7c373SQing Li if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 13429a1b64d5SAlexander V. Chernikov &rt_key.sin6_addr)) 1343baf7c373SQing Li continue; 1344baf7c373SQing Li } 13454208ea14SHajimu UMEMOTO 13464208ea14SHajimu UMEMOTO if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 1347d748f7efSMark Johnston &addr->sin6_addr, &pr->ndpr_mask)) { 1348d748f7efSMark Johnston ND6_RUNLOCK(); 13494208ea14SHajimu UMEMOTO return (1); 135082cd038dSYoshinobu Inoue } 1351d748f7efSMark Johnston } 1352d748f7efSMark Johnston ND6_RUNLOCK(); 13534208ea14SHajimu UMEMOTO 13544208ea14SHajimu UMEMOTO /* 1355743eee66SSUZUKI Shinsuke * If the address is assigned on the node of the other side of 1356743eee66SSUZUKI Shinsuke * a p2p interface, the address should be a neighbor. 1357743eee66SSUZUKI Shinsuke */ 1358559b4296SAlan Somers if (ifp->if_flags & IFF_POINTOPOINT) { 1359a68cc388SGleb Smirnoff struct epoch_tracker et; 1360a68cc388SGleb Smirnoff 1361a68cc388SGleb Smirnoff NET_EPOCH_ENTER(et); 1362d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1363559b4296SAlan Somers if (ifa->ifa_addr->sa_family != addr->sin6_family) 1364559b4296SAlan Somers continue; 1365559b4296SAlan Somers if (ifa->ifa_dstaddr != NULL && 1366559b4296SAlan Somers sa_equal(addr, ifa->ifa_dstaddr)) { 1367a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 1368559b4296SAlan Somers return 1; 13698c0fec80SRobert Watson } 1370559b4296SAlan Somers } 1371a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 13728c0fec80SRobert Watson } 1373743eee66SSUZUKI Shinsuke 1374743eee66SSUZUKI Shinsuke /* 13754208ea14SHajimu UMEMOTO * If the default router list is empty, all addresses are regarded 13764208ea14SHajimu UMEMOTO * as on-link, and thus, as a neighbor. 13774208ea14SHajimu UMEMOTO */ 1378e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV && 13793b0b2840SJohn Baldwin TAILQ_EMPTY(&V_nd_defrouter) && 1380603724d3SBjoern A. Zeeb V_nd6_defifindex == ifp->if_index) { 138182cd038dSYoshinobu Inoue return (1); 138282cd038dSYoshinobu Inoue } 138382cd038dSYoshinobu Inoue 138477b691e0SBrian Feldman return (0); 138577b691e0SBrian Feldman } 138677b691e0SBrian Feldman 138777b691e0SBrian Feldman 138877b691e0SBrian Feldman /* 138977b691e0SBrian Feldman * Detect if a given IPv6 address identifies a neighbor on a given link. 139077b691e0SBrian Feldman * XXX: should take care of the destination of a p2p link? 139177b691e0SBrian Feldman */ 139277b691e0SBrian Feldman int 1393f0316e1aSAlexander V. Chernikov nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp) 139477b691e0SBrian Feldman { 13956e6b3f7cSQing Li struct llentry *lle; 13966e6b3f7cSQing Li int rc = 0; 139777b691e0SBrian Feldman 1398b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 13996e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 140077b691e0SBrian Feldman if (nd6_is_new_addr_neighbor(addr, ifp)) 140177b691e0SBrian Feldman return (1); 140277b691e0SBrian Feldman 140382cd038dSYoshinobu Inoue /* 140482cd038dSYoshinobu Inoue * Even if the address matches none of our addresses, it might be 140582cd038dSYoshinobu Inoue * in the neighbor cache. 140682cd038dSYoshinobu Inoue */ 14076e6b3f7cSQing Li if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) { 14086e6b3f7cSQing Li LLE_RUNLOCK(lle); 14096e6b3f7cSQing Li rc = 1; 14106e6b3f7cSQing Li } 14116e6b3f7cSQing Li return (rc); 141282cd038dSYoshinobu Inoue } 141382cd038dSYoshinobu Inoue 141482cd038dSYoshinobu Inoue /* 141582cd038dSYoshinobu Inoue * Free an nd6 llinfo entry. 1416743eee66SSUZUKI Shinsuke * Since the function would cause significant changes in the kernel, DO NOT 1417743eee66SSUZUKI Shinsuke * make it global, unless you have a strong reason for the change, and are sure 1418743eee66SSUZUKI Shinsuke * that the change is safe. 1419c0b8aeaeSAlexander V. Chernikov * 1420c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 142182cd038dSYoshinobu Inoue */ 1422c0b8aeaeSAlexander V. Chernikov static __noinline void 1423435bece4SMark Johnston nd6_free(struct llentry **lnp, int gc) 142482cd038dSYoshinobu Inoue { 1425e6950476SBjoern A. Zeeb struct ifnet *ifp; 1426435bece4SMark Johnston struct llentry *ln; 1427435bece4SMark Johnston struct nd_defrouter *dr; 1428435bece4SMark Johnston 1429435bece4SMark Johnston ln = *lnp; 1430435bece4SMark Johnston *lnp = NULL; 1431e6950476SBjoern A. Zeeb 1432e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 1433435bece4SMark Johnston ND6_RLOCK_ASSERT(); 1434435bece4SMark Johnston 1435435bece4SMark Johnston ifp = lltable_get_ifp(ln->lle_tbl); 1436435bece4SMark Johnston if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0) 1437435bece4SMark Johnston dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp); 1438435bece4SMark Johnston else 1439435bece4SMark Johnston dr = NULL; 1440435bece4SMark Johnston ND6_RUNLOCK(); 1441435bece4SMark Johnston 1442435bece4SMark Johnston if ((ln->la_flags & LLE_DELETED) == 0) 1443435bece4SMark Johnston EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED); 144482cd038dSYoshinobu Inoue 144582cd038dSYoshinobu Inoue /* 144633841545SHajimu UMEMOTO * we used to have pfctlinput(PRC_HOSTDEAD) here. 144733841545SHajimu UMEMOTO * even though it is not harmful, it was not really necessary. 144882cd038dSYoshinobu Inoue */ 1449686cdd19SJun-ichiro itojun Hagino 1450743eee66SSUZUKI Shinsuke /* cancel timer */ 1451e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, -1); 1452e6950476SBjoern A. Zeeb 1453e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 1454743eee66SSUZUKI Shinsuke if (dr != NULL && dr->expire && 1455743eee66SSUZUKI Shinsuke ln->ln_state == ND6_LLINFO_STALE && gc) { 1456743eee66SSUZUKI Shinsuke /* 1457743eee66SSUZUKI Shinsuke * If the reason for the deletion is just garbage 1458743eee66SSUZUKI Shinsuke * collection, and the neighbor is an active default 1459743eee66SSUZUKI Shinsuke * router, do not delete it. Instead, reset the GC 1460743eee66SSUZUKI Shinsuke * timer using the router's lifetime. 1461743eee66SSUZUKI Shinsuke * Simply deleting the entry would affect default 1462743eee66SSUZUKI Shinsuke * router selection, which is not necessarily a good 1463743eee66SSUZUKI Shinsuke * thing, especially when we're using router preference 1464743eee66SSUZUKI Shinsuke * values. 1465743eee66SSUZUKI Shinsuke * XXX: the check for ln_state would be redundant, 1466743eee66SSUZUKI Shinsuke * but we intentionally keep it just in case. 1467743eee66SSUZUKI Shinsuke */ 14687d26db17SHiroki Sato if (dr->expire > time_uptime) 1469e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 14707d26db17SHiroki Sato (dr->expire - time_uptime) * hz); 1471743eee66SSUZUKI Shinsuke else 1472e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 1473e6950476SBjoern A. Zeeb (long)V_nd6_gctimer * hz); 1474e6950476SBjoern A. Zeeb 1475ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 1476ef8d671cSHajimu UMEMOTO LLE_WUNLOCK(ln); 14774de485feSMark Johnston defrouter_rele(dr); 1478d3cdb716SAlexander V. Chernikov return; 1479743eee66SSUZUKI Shinsuke } 1480743eee66SSUZUKI Shinsuke 1481686cdd19SJun-ichiro itojun Hagino if (dr) { 1482686cdd19SJun-ichiro itojun Hagino /* 1483686cdd19SJun-ichiro itojun Hagino * Unreachablity of a router might affect the default 1484686cdd19SJun-ichiro itojun Hagino * router selection and on-link detection of advertised 1485686cdd19SJun-ichiro itojun Hagino * prefixes. 1486686cdd19SJun-ichiro itojun Hagino */ 1487686cdd19SJun-ichiro itojun Hagino 1488686cdd19SJun-ichiro itojun Hagino /* 1489686cdd19SJun-ichiro itojun Hagino * Temporarily fake the state to choose a new default 1490686cdd19SJun-ichiro itojun Hagino * router and to perform on-link determination of 149188ff5695SSUZUKI Shinsuke * prefixes correctly. 1492686cdd19SJun-ichiro itojun Hagino * Below the state will be set correctly, 1493686cdd19SJun-ichiro itojun Hagino * or the entry itself will be deleted. 1494686cdd19SJun-ichiro itojun Hagino */ 1495686cdd19SJun-ichiro itojun Hagino ln->ln_state = ND6_LLINFO_INCOMPLETE; 14961d5089c2SBjoern A. Zeeb } 1497686cdd19SJun-ichiro itojun Hagino 14981d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) { 14991d5089c2SBjoern A. Zeeb 15001d5089c2SBjoern A. Zeeb /* 15011d5089c2SBjoern A. Zeeb * We need to unlock to avoid a LOR with rt6_flush() with the 15021d5089c2SBjoern A. Zeeb * rnh and for the calls to pfxlist_onlink_check() and 1503559b4296SAlan Somers * defrouter_select_fib() in the block further down for calls 15041d5089c2SBjoern A. Zeeb * into nd6_lookup(). We still hold a ref. 15051d5089c2SBjoern A. Zeeb */ 15061d5089c2SBjoern A. Zeeb LLE_WUNLOCK(ln); 15071d5089c2SBjoern A. Zeeb 15081d5089c2SBjoern A. Zeeb /* 15091d5089c2SBjoern A. Zeeb * rt6_flush must be called whether or not the neighbor 15101d5089c2SBjoern A. Zeeb * is in the Default Router List. 15111d5089c2SBjoern A. Zeeb * See a corresponding comment in nd6_na_input(). 15121d5089c2SBjoern A. Zeeb */ 1513314294deSAlexander V. Chernikov rt6_flush(&ln->r_l3addr.addr6, ifp); 15141d5089c2SBjoern A. Zeeb } 15151d5089c2SBjoern A. Zeeb 15161d5089c2SBjoern A. Zeeb if (dr) { 151733841545SHajimu UMEMOTO /* 1518559b4296SAlan Somers * Since defrouter_select_fib() does not affect the 151933841545SHajimu UMEMOTO * on-link determination and MIP6 needs the check 152033841545SHajimu UMEMOTO * before the default router selection, we perform 152133841545SHajimu UMEMOTO * the check now. 152233841545SHajimu UMEMOTO */ 152333841545SHajimu UMEMOTO pfxlist_onlink_check(); 152433841545SHajimu UMEMOTO 1525686cdd19SJun-ichiro itojun Hagino /* 15261d5089c2SBjoern A. Zeeb * Refresh default router list. 1527686cdd19SJun-ichiro itojun Hagino */ 1528559b4296SAlan Somers defrouter_select_fib(dr->ifp->if_fib); 1529686cdd19SJun-ichiro itojun Hagino } 15301d5089c2SBjoern A. Zeeb 153117a03656SEric van Gyzen /* 153217a03656SEric van Gyzen * If this entry was added by an on-link redirect, remove the 153317a03656SEric van Gyzen * corresponding host route. 153417a03656SEric van Gyzen */ 153517a03656SEric van Gyzen if (ln->la_flags & LLE_REDIRECT) 153617a03656SEric van Gyzen nd6_free_redirect(ln); 153717a03656SEric van Gyzen 15381d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) 15391d5089c2SBjoern A. Zeeb LLE_WLOCK(ln); 154082cd038dSYoshinobu Inoue } 154182cd038dSYoshinobu Inoue 154233841545SHajimu UMEMOTO /* 1543e6950476SBjoern A. Zeeb * Save to unlock. We still hold an extra reference and will not 1544e6950476SBjoern A. Zeeb * free(9) in llentry_free() if someone else holds one as well. 1545e6950476SBjoern A. Zeeb */ 1546e6950476SBjoern A. Zeeb LLE_WUNLOCK(ln); 15476e6b3f7cSQing Li IF_AFDATA_LOCK(ifp); 15486e6b3f7cSQing Li LLE_WLOCK(ln); 1549b1ec2940SGleb Smirnoff /* Guard against race with other llentry_free(). */ 1550b1ec2940SGleb Smirnoff if (ln->la_flags & LLE_LINKED) { 1551d3cdb716SAlexander V. Chernikov /* Remove callout reference */ 1552becba438SBjoern A. Zeeb LLE_REMREF(ln); 1553d3cdb716SAlexander V. Chernikov lltable_unlink_entry(ln->lle_tbl, ln); 1554d3cdb716SAlexander V. Chernikov } 15556e6b3f7cSQing Li IF_AFDATA_UNLOCK(ifp); 155633841545SHajimu UMEMOTO 1557d3cdb716SAlexander V. Chernikov llentry_free(ln); 15584de485feSMark Johnston if (dr != NULL) 15594de485feSMark Johnston defrouter_rele(dr); 156082cd038dSYoshinobu Inoue } 156182cd038dSYoshinobu Inoue 1562e8b0643eSAlexander V. Chernikov static int 1563e8b0643eSAlexander V. Chernikov nd6_isdynrte(const struct rtentry *rt, void *xap) 1564e8b0643eSAlexander V. Chernikov { 1565e8b0643eSAlexander V. Chernikov 1566e8b0643eSAlexander V. Chernikov if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC)) 1567e8b0643eSAlexander V. Chernikov return (1); 1568e8b0643eSAlexander V. Chernikov 1569e8b0643eSAlexander V. Chernikov return (0); 1570e8b0643eSAlexander V. Chernikov } 157182cd038dSYoshinobu Inoue /* 157217a03656SEric van Gyzen * Remove the rtentry for the given llentry, 157317a03656SEric van Gyzen * both of which were installed by a redirect. 157417a03656SEric van Gyzen */ 157517a03656SEric van Gyzen static void 157617a03656SEric van Gyzen nd6_free_redirect(const struct llentry *ln) 157717a03656SEric van Gyzen { 157817a03656SEric van Gyzen int fibnum; 157917a03656SEric van Gyzen struct sockaddr_in6 sin6; 1580e8b0643eSAlexander V. Chernikov struct rt_addrinfo info; 158117a03656SEric van Gyzen 158217a03656SEric van Gyzen lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6); 1583e8b0643eSAlexander V. Chernikov memset(&info, 0, sizeof(info)); 1584e8b0643eSAlexander V. Chernikov info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6; 1585e8b0643eSAlexander V. Chernikov info.rti_filter = nd6_isdynrte; 158617a03656SEric van Gyzen 1587e8b0643eSAlexander V. Chernikov for (fibnum = 0; fibnum < rt_numfibs; fibnum++) 1588e8b0643eSAlexander V. Chernikov rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum); 158917a03656SEric van Gyzen } 159017a03656SEric van Gyzen 159117a03656SEric van Gyzen /* 15920f1aca65SQing Li * Rejuvenate this function for routing operations related 15930f1aca65SQing Li * processing. 15940f1aca65SQing Li */ 15950f1aca65SQing Li void 15960f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info) 15970f1aca65SQing Li { 159839e19560SBjoern A. Zeeb struct sockaddr_in6 *gateway; 15990f1aca65SQing Li struct nd_defrouter *dr; 160039e19560SBjoern A. Zeeb struct ifnet *ifp; 16010f1aca65SQing Li 160239e19560SBjoern A. Zeeb gateway = (struct sockaddr_in6 *)rt->rt_gateway; 160339e19560SBjoern A. Zeeb ifp = rt->rt_ifp; 16040f1aca65SQing Li 16050f1aca65SQing Li switch (req) { 16060f1aca65SQing Li case RTM_ADD: 16070f1aca65SQing Li break; 16080f1aca65SQing Li 16090f1aca65SQing Li case RTM_DELETE: 16100f1aca65SQing Li if (!ifp) 16110f1aca65SQing Li return; 16120f1aca65SQing Li /* 16130f1aca65SQing Li * Only indirect routes are interesting. 16140f1aca65SQing Li */ 16150f1aca65SQing Li if ((rt->rt_flags & RTF_GATEWAY) == 0) 16160f1aca65SQing Li return; 16170f1aca65SQing Li /* 16180f1aca65SQing Li * check for default route 16190f1aca65SQing Li */ 16200f1aca65SQing Li if (IN6_ARE_ADDR_EQUAL(&in6addr_any, 16210f1aca65SQing Li &SIN6(rt_key(rt))->sin6_addr)) { 16220f1aca65SQing Li dr = defrouter_lookup(&gateway->sin6_addr, ifp); 16234de485feSMark Johnston if (dr != NULL) { 16240f1aca65SQing Li dr->installed = 0; 16254de485feSMark Johnston defrouter_rele(dr); 16264de485feSMark Johnston } 16270f1aca65SQing Li } 16280f1aca65SQing Li break; 16290f1aca65SQing Li } 16300f1aca65SQing Li } 16310f1aca65SQing Li 16320f1aca65SQing Li 163382cd038dSYoshinobu Inoue int 16341272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp) 163582cd038dSYoshinobu Inoue { 163682cd038dSYoshinobu Inoue struct in6_ndireq *ndi = (struct in6_ndireq *)data; 163782cd038dSYoshinobu Inoue struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1638686cdd19SJun-ichiro itojun Hagino struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1639a68cc388SGleb Smirnoff struct epoch_tracker et; 1640d0bec2c5SHiroki Sato int error = 0; 164182cd038dSYoshinobu Inoue 16420de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 16430de0dd9bSHiroki Sato return (EPFNOSUPPORT); 164482cd038dSYoshinobu Inoue switch (cmd) { 164533841545SHajimu UMEMOTO case OSIOCGIFINFO_IN6: 16462ce62dceSSUZUKI Shinsuke #define ND ndi->ndi 164731b1bfe1SHajimu UMEMOTO /* XXX: old ndp(8) assumes a positive value for linkmtu. */ 16482ce62dceSSUZUKI Shinsuke bzero(&ND, sizeof(ND)); 16492ce62dceSSUZUKI Shinsuke ND.linkmtu = IN6_LINKMTU(ifp); 16502ce62dceSSUZUKI Shinsuke ND.maxmtu = ND_IFINFO(ifp)->maxmtu; 16512ce62dceSSUZUKI Shinsuke ND.basereachable = ND_IFINFO(ifp)->basereachable; 16522ce62dceSSUZUKI Shinsuke ND.reachable = ND_IFINFO(ifp)->reachable; 16532ce62dceSSUZUKI Shinsuke ND.retrans = ND_IFINFO(ifp)->retrans; 16542ce62dceSSUZUKI Shinsuke ND.flags = ND_IFINFO(ifp)->flags; 16552ce62dceSSUZUKI Shinsuke ND.recalctm = ND_IFINFO(ifp)->recalctm; 16562ce62dceSSUZUKI Shinsuke ND.chlim = ND_IFINFO(ifp)->chlim; 165733841545SHajimu UMEMOTO break; 165882cd038dSYoshinobu Inoue case SIOCGIFINFO_IN6: 16592ce62dceSSUZUKI Shinsuke ND = *ND_IFINFO(ifp); 166082cd038dSYoshinobu Inoue break; 1661b9204379SSUZUKI Shinsuke case SIOCSIFINFO_IN6: 1662b9204379SSUZUKI Shinsuke /* 1663b9204379SSUZUKI Shinsuke * used to change host variables from userland. 1664a4641f4eSPedro F. Giffuni * intended for a use on router to reflect RA configurations. 1665b9204379SSUZUKI Shinsuke */ 1666b9204379SSUZUKI Shinsuke /* 0 means 'unspecified' */ 1667b9204379SSUZUKI Shinsuke if (ND.linkmtu != 0) { 1668b9204379SSUZUKI Shinsuke if (ND.linkmtu < IPV6_MMTU || 1669b9204379SSUZUKI Shinsuke ND.linkmtu > IN6_LINKMTU(ifp)) { 1670b9204379SSUZUKI Shinsuke error = EINVAL; 1671b9204379SSUZUKI Shinsuke break; 1672b9204379SSUZUKI Shinsuke } 1673b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->linkmtu = ND.linkmtu; 1674b9204379SSUZUKI Shinsuke } 1675b9204379SSUZUKI Shinsuke 1676b9204379SSUZUKI Shinsuke if (ND.basereachable != 0) { 1677b9204379SSUZUKI Shinsuke int obasereachable = ND_IFINFO(ifp)->basereachable; 1678b9204379SSUZUKI Shinsuke 1679b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->basereachable = ND.basereachable; 1680b9204379SSUZUKI Shinsuke if (ND.basereachable != obasereachable) 1681b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->reachable = 1682b9204379SSUZUKI Shinsuke ND_COMPUTE_RTIME(ND.basereachable); 1683b9204379SSUZUKI Shinsuke } 1684b9204379SSUZUKI Shinsuke if (ND.retrans != 0) 1685b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->retrans = ND.retrans; 1686b9204379SSUZUKI Shinsuke if (ND.chlim != 0) 1687b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->chlim = ND.chlim; 1688b9204379SSUZUKI Shinsuke /* FALLTHROUGH */ 1689686cdd19SJun-ichiro itojun Hagino case SIOCSIFINFO_FLAGS: 1690a283298cSHiroki Sato { 1691a283298cSHiroki Sato struct ifaddr *ifa; 1692a283298cSHiroki Sato struct in6_ifaddr *ia; 1693a283298cSHiroki Sato 1694a283298cSHiroki Sato if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1695a283298cSHiroki Sato !(ND.flags & ND6_IFF_IFDISABLED)) { 1696a283298cSHiroki Sato /* ifdisabled 1->0 transision */ 1697a283298cSHiroki Sato 1698a283298cSHiroki Sato /* 1699a283298cSHiroki Sato * If the interface is marked as ND6_IFF_IFDISABLED and 1700a283298cSHiroki Sato * has an link-local address with IN6_IFF_DUPLICATED, 1701a283298cSHiroki Sato * do not clear ND6_IFF_IFDISABLED. 1702a283298cSHiroki Sato * See RFC 4862, Section 5.4.5. 1703a283298cSHiroki Sato */ 1704ef2e580eSGleb Smirnoff NET_EPOCH_ENTER(et); 1705d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1706a283298cSHiroki Sato if (ifa->ifa_addr->sa_family != AF_INET6) 1707a283298cSHiroki Sato continue; 1708a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1709a283298cSHiroki Sato if ((ia->ia6_flags & IN6_IFF_DUPLICATED) && 1710d0bec2c5SHiroki Sato IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 1711a283298cSHiroki Sato break; 1712a283298cSHiroki Sato } 1713ef2e580eSGleb Smirnoff NET_EPOCH_EXIT(et); 1714a283298cSHiroki Sato 1715d0bec2c5SHiroki Sato if (ifa != NULL) { 1716d0bec2c5SHiroki Sato /* LLA is duplicated. */ 1717a283298cSHiroki Sato ND.flags |= ND6_IFF_IFDISABLED; 1718a283298cSHiroki Sato log(LOG_ERR, "Cannot enable an interface" 1719a283298cSHiroki Sato " with a link-local address marked" 1720a283298cSHiroki Sato " duplicate.\n"); 1721a283298cSHiroki Sato } else { 1722a283298cSHiroki Sato ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED; 1723154d5f73SHiroki Sato if (ifp->if_flags & IFF_UP) 1724a283298cSHiroki Sato in6_if_up(ifp); 1725a283298cSHiroki Sato } 1726a283298cSHiroki Sato } else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1727a283298cSHiroki Sato (ND.flags & ND6_IFF_IFDISABLED)) { 1728a283298cSHiroki Sato /* ifdisabled 0->1 transision */ 1729a283298cSHiroki Sato /* Mark all IPv6 address as tentative. */ 1730a283298cSHiroki Sato 1731a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED; 17326401c828SHiroki Sato if (V_ip6_dad_count > 0 && 17336401c828SHiroki Sato (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) { 1734ef2e580eSGleb Smirnoff NET_EPOCH_ENTER(et); 1735d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, 1736d0bec2c5SHiroki Sato ifa_link) { 1737d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1738d0bec2c5SHiroki Sato AF_INET6) 1739a283298cSHiroki Sato continue; 1740a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1741a283298cSHiroki Sato ia->ia6_flags |= IN6_IFF_TENTATIVE; 1742a283298cSHiroki Sato } 1743ef2e580eSGleb Smirnoff NET_EPOCH_EXIT(et); 1744a283298cSHiroki Sato } 1745d0bec2c5SHiroki Sato } 1746a283298cSHiroki Sato 1747154d5f73SHiroki Sato if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) { 1748154d5f73SHiroki Sato if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) { 1749a283298cSHiroki Sato /* auto_linklocal 0->1 transision */ 1750a283298cSHiroki Sato 1751a283298cSHiroki Sato /* If no link-local address on ifp, configure */ 1752a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL; 1753a283298cSHiroki Sato in6_ifattach(ifp, NULL); 1754154d5f73SHiroki Sato } else if (!(ND.flags & ND6_IFF_IFDISABLED) && 1755154d5f73SHiroki Sato ifp->if_flags & IFF_UP) { 175677bc4985SHiroki Sato /* 175777bc4985SHiroki Sato * When the IF already has 1758154d5f73SHiroki Sato * ND6_IFF_AUTO_LINKLOCAL, no link-local 1759154d5f73SHiroki Sato * address is assigned, and IFF_UP, try to 1760154d5f73SHiroki Sato * assign one. 176177bc4985SHiroki Sato */ 1762ef2e580eSGleb Smirnoff NET_EPOCH_ENTER(et); 1763d7c5a620SMatt Macy CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, 1764d0bec2c5SHiroki Sato ifa_link) { 1765d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1766d0bec2c5SHiroki Sato AF_INET6) 176777bc4985SHiroki Sato continue; 176877bc4985SHiroki Sato ia = (struct in6_ifaddr *)ifa; 1769d0bec2c5SHiroki Sato if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 177077bc4985SHiroki Sato break; 177177bc4985SHiroki Sato } 1772ef2e580eSGleb Smirnoff NET_EPOCH_EXIT(et); 1773d0bec2c5SHiroki Sato if (ifa != NULL) 1774d0bec2c5SHiroki Sato /* No LLA is configured. */ 177577bc4985SHiroki Sato in6_ifattach(ifp, NULL); 1776a283298cSHiroki Sato } 1777a283298cSHiroki Sato } 17782ce62dceSSUZUKI Shinsuke ND_IFINFO(ifp)->flags = ND.flags; 1779686cdd19SJun-ichiro itojun Hagino break; 1780b8a6e03fSGleb Smirnoff } 17812ce62dceSSUZUKI Shinsuke #undef ND 1782686cdd19SJun-ichiro itojun Hagino case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1783743eee66SSUZUKI Shinsuke /* sync kernel routing table with the default router list */ 1784743eee66SSUZUKI Shinsuke defrouter_reset(); 1785686cdd19SJun-ichiro itojun Hagino defrouter_select(); 178682cd038dSYoshinobu Inoue break; 178782cd038dSYoshinobu Inoue case SIOCSPFXFLUSH_IN6: 178882cd038dSYoshinobu Inoue { 178982cd038dSYoshinobu Inoue /* flush all the prefix advertised by routers */ 179033841545SHajimu UMEMOTO struct in6_ifaddr *ia, *ia_next; 1791d748f7efSMark Johnston struct nd_prefix *pr, *next; 1792d748f7efSMark Johnston struct nd_prhead prl; 179333841545SHajimu UMEMOTO 1794d748f7efSMark Johnston LIST_INIT(&prl); 1795d748f7efSMark Johnston 1796d748f7efSMark Johnston ND6_WLOCK(); 1797d748f7efSMark Johnston LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) { 179833841545SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) 179933841545SHajimu UMEMOTO continue; /* XXX */ 1800d748f7efSMark Johnston nd6_prefix_unlink(pr, &prl); 1801d748f7efSMark Johnston } 1802d748f7efSMark Johnston ND6_WUNLOCK(); 180333841545SHajimu UMEMOTO 1804d748f7efSMark Johnston while ((pr = LIST_FIRST(&prl)) != NULL) { 1805d748f7efSMark Johnston LIST_REMOVE(pr, ndpr_entry); 1806d1da0a06SRobert Watson /* XXXRW: in6_ifaddrhead locking. */ 1807d7c5a620SMatt Macy CK_STAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link, 180880af0152SRobert Watson ia_next) { 180933841545SHajimu UMEMOTO if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) 181033841545SHajimu UMEMOTO continue; 181133841545SHajimu UMEMOTO 181233841545SHajimu UMEMOTO if (ia->ia6_ndpr == pr) 181333841545SHajimu UMEMOTO in6_purgeaddr(&ia->ia_ifa); 181433841545SHajimu UMEMOTO } 1815d748f7efSMark Johnston nd6_prefix_del(pr); 181682cd038dSYoshinobu Inoue } 181782cd038dSYoshinobu Inoue break; 181882cd038dSYoshinobu Inoue } 181982cd038dSYoshinobu Inoue case SIOCSRTRFLUSH_IN6: 182082cd038dSYoshinobu Inoue { 182182cd038dSYoshinobu Inoue /* flush all the default routers */ 18224de485feSMark Johnston struct nd_drhead drq; 18234de485feSMark Johnston struct nd_defrouter *dr; 18244de485feSMark Johnston 18254de485feSMark Johnston TAILQ_INIT(&drq); 182682cd038dSYoshinobu Inoue 1827743eee66SSUZUKI Shinsuke defrouter_reset(); 18284de485feSMark Johnston 18294de485feSMark Johnston ND6_WLOCK(); 18304de485feSMark Johnston while ((dr = TAILQ_FIRST(&V_nd_defrouter)) != NULL) 18314de485feSMark Johnston defrouter_unlink(dr, &drq); 18324de485feSMark Johnston ND6_WUNLOCK(); 18334de485feSMark Johnston while ((dr = TAILQ_FIRST(&drq)) != NULL) { 18344de485feSMark Johnston TAILQ_REMOVE(&drq, dr, dr_entry); 18354de485feSMark Johnston defrouter_del(dr); 183682cd038dSYoshinobu Inoue } 18374de485feSMark Johnston 1838743eee66SSUZUKI Shinsuke defrouter_select(); 183982cd038dSYoshinobu Inoue break; 184082cd038dSYoshinobu Inoue } 184182cd038dSYoshinobu Inoue case SIOCGNBRINFO_IN6: 184282cd038dSYoshinobu Inoue { 18436e6b3f7cSQing Li struct llentry *ln; 184482cd038dSYoshinobu Inoue struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 184582cd038dSYoshinobu Inoue 1846a1f7e5f8SHajimu UMEMOTO if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0) 1847a1f7e5f8SHajimu UMEMOTO return (error); 184882cd038dSYoshinobu Inoue 1849a68cc388SGleb Smirnoff NET_EPOCH_ENTER(et); 18506e6b3f7cSQing Li ln = nd6_lookup(&nb_addr, 0, ifp); 1851a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 18526e6b3f7cSQing Li 18536e6b3f7cSQing Li if (ln == NULL) { 185482cd038dSYoshinobu Inoue error = EINVAL; 185582cd038dSYoshinobu Inoue break; 185682cd038dSYoshinobu Inoue } 185782cd038dSYoshinobu Inoue nbi->state = ln->ln_state; 18586e6b3f7cSQing Li nbi->asked = ln->la_asked; 185982cd038dSYoshinobu Inoue nbi->isrouter = ln->ln_router; 18605a041915SHiroki Sato if (ln->la_expire == 0) 18615a041915SHiroki Sato nbi->expire = 0; 18625a041915SHiroki Sato else 1863427c2f4eSAlexander V. Chernikov nbi->expire = ln->la_expire + ln->lle_remtime / hz + 18645a041915SHiroki Sato (time_second - time_uptime); 18656e6b3f7cSQing Li LLE_RUNLOCK(ln); 186682cd038dSYoshinobu Inoue break; 186782cd038dSYoshinobu Inoue } 1868686cdd19SJun-ichiro itojun Hagino case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1869603724d3SBjoern A. Zeeb ndif->ifindex = V_nd6_defifindex; 1870686cdd19SJun-ichiro itojun Hagino break; 1871686cdd19SJun-ichiro itojun Hagino case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1872686cdd19SJun-ichiro itojun Hagino return (nd6_setdefaultiface(ndif->ifindex)); 187382cd038dSYoshinobu Inoue } 187482cd038dSYoshinobu Inoue return (error); 187582cd038dSYoshinobu Inoue } 187682cd038dSYoshinobu Inoue 187782cd038dSYoshinobu Inoue /* 18780e2dcee6SAlexander V. Chernikov * Calculates new isRouter value based on provided parameters and 18790e2dcee6SAlexander V. Chernikov * returns it. 18800e2dcee6SAlexander V. Chernikov */ 18810e2dcee6SAlexander V. Chernikov static int 18820e2dcee6SAlexander V. Chernikov nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr, 18830e2dcee6SAlexander V. Chernikov int ln_router) 18840e2dcee6SAlexander V. Chernikov { 18850e2dcee6SAlexander V. Chernikov 18860e2dcee6SAlexander V. Chernikov /* 18870e2dcee6SAlexander V. Chernikov * ICMP6 type dependent behavior. 18880e2dcee6SAlexander V. Chernikov * 18890e2dcee6SAlexander V. Chernikov * NS: clear IsRouter if new entry 18900e2dcee6SAlexander V. Chernikov * RS: clear IsRouter 18910e2dcee6SAlexander V. Chernikov * RA: set IsRouter if there's lladdr 18920e2dcee6SAlexander V. Chernikov * redir: clear IsRouter if new entry 18930e2dcee6SAlexander V. Chernikov * 18940e2dcee6SAlexander V. Chernikov * RA case, (1): 18950e2dcee6SAlexander V. Chernikov * The spec says that we must set IsRouter in the following cases: 18960e2dcee6SAlexander V. Chernikov * - If lladdr exist, set IsRouter. This means (1-5). 18970e2dcee6SAlexander V. Chernikov * - If it is old entry (!newentry), set IsRouter. This means (7). 18980e2dcee6SAlexander V. Chernikov * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 18990e2dcee6SAlexander V. Chernikov * A quetion arises for (1) case. (1) case has no lladdr in the 19000e2dcee6SAlexander V. Chernikov * neighbor cache, this is similar to (6). 19010e2dcee6SAlexander V. Chernikov * This case is rare but we figured that we MUST NOT set IsRouter. 19020e2dcee6SAlexander V. Chernikov * 190341a31e78SAlexander V. Chernikov * is_new old_addr new_addr NS RS RA redir 19040e2dcee6SAlexander V. Chernikov * D R 190541a31e78SAlexander V. Chernikov * 0 n n (1) c ? s 190641a31e78SAlexander V. Chernikov * 0 y n (2) c s s 190741a31e78SAlexander V. Chernikov * 0 n y (3) c s s 190841a31e78SAlexander V. Chernikov * 0 y y (4) c s s 190941a31e78SAlexander V. Chernikov * 0 y y (5) c s s 191041a31e78SAlexander V. Chernikov * 1 -- n (6) c c c s 191141a31e78SAlexander V. Chernikov * 1 -- y (7) c c s c s 19120e2dcee6SAlexander V. Chernikov * 19130e2dcee6SAlexander V. Chernikov * (c=clear s=set) 19140e2dcee6SAlexander V. Chernikov */ 19150e2dcee6SAlexander V. Chernikov switch (type & 0xff) { 19160e2dcee6SAlexander V. Chernikov case ND_NEIGHBOR_SOLICIT: 19170e2dcee6SAlexander V. Chernikov /* 19180e2dcee6SAlexander V. Chernikov * New entry must have is_router flag cleared. 19190e2dcee6SAlexander V. Chernikov */ 19200e2dcee6SAlexander V. Chernikov if (is_new) /* (6-7) */ 19210e2dcee6SAlexander V. Chernikov ln_router = 0; 19220e2dcee6SAlexander V. Chernikov break; 19230e2dcee6SAlexander V. Chernikov case ND_REDIRECT: 19240e2dcee6SAlexander V. Chernikov /* 19250e2dcee6SAlexander V. Chernikov * If the icmp is a redirect to a better router, always set the 19260e2dcee6SAlexander V. Chernikov * is_router flag. Otherwise, if the entry is newly created, 19270e2dcee6SAlexander V. Chernikov * clear the flag. [RFC 2461, sec 8.3] 19280e2dcee6SAlexander V. Chernikov */ 19290e2dcee6SAlexander V. Chernikov if (code == ND_REDIRECT_ROUTER) 19300e2dcee6SAlexander V. Chernikov ln_router = 1; 19310e2dcee6SAlexander V. Chernikov else { 19320e2dcee6SAlexander V. Chernikov if (is_new) /* (6-7) */ 19330e2dcee6SAlexander V. Chernikov ln_router = 0; 19340e2dcee6SAlexander V. Chernikov } 19350e2dcee6SAlexander V. Chernikov break; 19360e2dcee6SAlexander V. Chernikov case ND_ROUTER_SOLICIT: 19370e2dcee6SAlexander V. Chernikov /* 19380e2dcee6SAlexander V. Chernikov * is_router flag must always be cleared. 19390e2dcee6SAlexander V. Chernikov */ 19400e2dcee6SAlexander V. Chernikov ln_router = 0; 19410e2dcee6SAlexander V. Chernikov break; 19420e2dcee6SAlexander V. Chernikov case ND_ROUTER_ADVERT: 19430e2dcee6SAlexander V. Chernikov /* 19440e2dcee6SAlexander V. Chernikov * Mark an entry with lladdr as a router. 19450e2dcee6SAlexander V. Chernikov */ 19460e2dcee6SAlexander V. Chernikov if ((!is_new && (old_addr || new_addr)) || /* (2-5) */ 19470e2dcee6SAlexander V. Chernikov (is_new && new_addr)) { /* (7) */ 19480e2dcee6SAlexander V. Chernikov ln_router = 1; 19490e2dcee6SAlexander V. Chernikov } 19500e2dcee6SAlexander V. Chernikov break; 19510e2dcee6SAlexander V. Chernikov } 19520e2dcee6SAlexander V. Chernikov 19530e2dcee6SAlexander V. Chernikov return (ln_router); 19540e2dcee6SAlexander V. Chernikov } 19550e2dcee6SAlexander V. Chernikov 19560e2dcee6SAlexander V. Chernikov /* 195782cd038dSYoshinobu Inoue * Create neighbor cache entry and cache link-layer address, 195882cd038dSYoshinobu Inoue * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 19591272577eSXin LI * 19601272577eSXin LI * type - ICMP6 type 19611272577eSXin LI * code - type dependent information 19626e6b3f7cSQing Li * 196382cd038dSYoshinobu Inoue */ 19640e2dcee6SAlexander V. Chernikov void 19651272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr, 19661272577eSXin LI int lladdrlen, int type, int code) 196782cd038dSYoshinobu Inoue { 19685a255516SAlexander V. Chernikov struct llentry *ln = NULL, *ln_tmp; 196982cd038dSYoshinobu Inoue int is_newentry; 197082cd038dSYoshinobu Inoue int do_update; 197182cd038dSYoshinobu Inoue int olladdr; 197282cd038dSYoshinobu Inoue int llchange; 197368352503SBjoern A. Zeeb int flags; 19743d3728e9SQing Li uint16_t router = 0; 19756e6b3f7cSQing Li struct sockaddr_in6 sin6; 1976fd14c50bSKip Macy struct mbuf *chain = NULL; 19774fb3a820SAlexander V. Chernikov u_char linkhdr[LLE_MAX_LINKHDR]; 19784fb3a820SAlexander V. Chernikov size_t linkhdrsize; 19794fb3a820SAlexander V. Chernikov int lladdr_off; 19806e6b3f7cSQing Li 1981b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 19826e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 198382cd038dSYoshinobu Inoue 198439e19560SBjoern A. Zeeb KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__)); 198539e19560SBjoern A. Zeeb KASSERT(from != NULL, ("%s: from == NULL", __func__)); 198682cd038dSYoshinobu Inoue 198782cd038dSYoshinobu Inoue /* nothing must be updated for unspecified address */ 198882cd038dSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED(from)) 19890e2dcee6SAlexander V. Chernikov return; 199082cd038dSYoshinobu Inoue 199182cd038dSYoshinobu Inoue /* 199282cd038dSYoshinobu Inoue * Validation about ifp->if_addrlen and lladdrlen must be done in 199382cd038dSYoshinobu Inoue * the caller. 199482cd038dSYoshinobu Inoue * 199582cd038dSYoshinobu Inoue * XXX If the link does not have link-layer adderss, what should 199682cd038dSYoshinobu Inoue * we do? (ifp->if_addrlen == 0) 199782cd038dSYoshinobu Inoue * Spec says nothing in sections for RA, RS and NA. There's small 199882cd038dSYoshinobu Inoue * description on it in NS section (RFC 2461 7.2.3). 199982cd038dSYoshinobu Inoue */ 2000f506d933SAlexander V. Chernikov flags = lladdr ? LLE_EXCLUSIVE : 0; 20016e6b3f7cSQing Li ln = nd6_lookup(from, flags, ifp); 20025a255516SAlexander V. Chernikov is_newentry = 0; 20036e6b3f7cSQing Li if (ln == NULL) { 2004f506d933SAlexander V. Chernikov flags |= LLE_EXCLUSIVE; 20055a255516SAlexander V. Chernikov ln = nd6_alloc(from, 0, ifp); 20065a255516SAlexander V. Chernikov if (ln == NULL) 20070e2dcee6SAlexander V. Chernikov return; 2008501adf01SAlexander V. Chernikov 2009501adf01SAlexander V. Chernikov /* 2010501adf01SAlexander V. Chernikov * Since we already know all the data for the new entry, 2011501adf01SAlexander V. Chernikov * fill it before insertion. 2012501adf01SAlexander V. Chernikov */ 20134fb3a820SAlexander V. Chernikov if (lladdr != NULL) { 20144fb3a820SAlexander V. Chernikov linkhdrsize = sizeof(linkhdr); 20154fb3a820SAlexander V. Chernikov if (lltable_calc_llheader(ifp, AF_INET6, lladdr, 20164fb3a820SAlexander V. Chernikov linkhdr, &linkhdrsize, &lladdr_off) != 0) 20174fb3a820SAlexander V. Chernikov return; 20184fb3a820SAlexander V. Chernikov lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize, 20194fb3a820SAlexander V. Chernikov lladdr_off); 20204fb3a820SAlexander V. Chernikov } 20214fb3a820SAlexander V. Chernikov 20225a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 20235a255516SAlexander V. Chernikov LLE_WLOCK(ln); 20245a255516SAlexander V. Chernikov /* Prefer any existing lle over newly-created one */ 2025f506d933SAlexander V. Chernikov ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp); 20265a255516SAlexander V. Chernikov if (ln_tmp == NULL) 20275a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 20285a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 20291496229aSAlexander V. Chernikov if (ln_tmp == NULL) { 2030ab415c83SAlexander V. Chernikov /* No existing lle, mark as new entry (6,7) */ 203182cd038dSYoshinobu Inoue is_newentry = 1; 2032f8116f39SEric van Gyzen if (lladdr != NULL) { /* (7) */ 2033aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); 2034ab415c83SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, 2035ab415c83SAlexander V. Chernikov LLENTRY_RESOLVED); 2036f8116f39SEric van Gyzen } 20371496229aSAlexander V. Chernikov } else { 20385a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), ln); 20395a255516SAlexander V. Chernikov ln = ln_tmp; 20405a255516SAlexander V. Chernikov ln_tmp = NULL; 20415a255516SAlexander V. Chernikov } 20425a255516SAlexander V. Chernikov } 204333841545SHajimu UMEMOTO /* do nothing if static ndp is set */ 20445a255516SAlexander V. Chernikov if ((ln->la_flags & LLE_STATIC)) { 2045f506d933SAlexander V. Chernikov if (flags & LLE_EXCLUSIVE) 20460e2dcee6SAlexander V. Chernikov LLE_WUNLOCK(ln); 20470e2dcee6SAlexander V. Chernikov else 20480e2dcee6SAlexander V. Chernikov LLE_RUNLOCK(ln); 20490e2dcee6SAlexander V. Chernikov return; 20503d3728e9SQing Li } 205182cd038dSYoshinobu Inoue 20526e6b3f7cSQing Li olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0; 205382cd038dSYoshinobu Inoue if (olladdr && lladdr) { 20544fb3a820SAlexander V. Chernikov llchange = bcmp(lladdr, ln->ll_addr, 20556e6b3f7cSQing Li ifp->if_addrlen); 205641a31e78SAlexander V. Chernikov } else if (!olladdr && lladdr) 205741a31e78SAlexander V. Chernikov llchange = 1; 205841a31e78SAlexander V. Chernikov else 205982cd038dSYoshinobu Inoue llchange = 0; 206082cd038dSYoshinobu Inoue 206182cd038dSYoshinobu Inoue /* 206282cd038dSYoshinobu Inoue * newentry olladdr lladdr llchange (*=record) 206382cd038dSYoshinobu Inoue * 0 n n -- (1) 206482cd038dSYoshinobu Inoue * 0 y n -- (2) 206541a31e78SAlexander V. Chernikov * 0 n y y (3) * STALE 206682cd038dSYoshinobu Inoue * 0 y y n (4) * 206782cd038dSYoshinobu Inoue * 0 y y y (5) * STALE 206882cd038dSYoshinobu Inoue * 1 -- n -- (6) NOSTATE(= PASSIVE) 206982cd038dSYoshinobu Inoue * 1 -- y -- (7) * STALE 207082cd038dSYoshinobu Inoue */ 207182cd038dSYoshinobu Inoue 2072501adf01SAlexander V. Chernikov do_update = 0; 20737503e0c7SAlexander V. Chernikov if (is_newentry == 0 && llchange != 0) { 2074501adf01SAlexander V. Chernikov do_update = 1; /* (3,5) */ 2075501adf01SAlexander V. Chernikov 207682cd038dSYoshinobu Inoue /* 207782cd038dSYoshinobu Inoue * Record source link-layer address 207882cd038dSYoshinobu Inoue * XXX is it dependent to ifp->if_type? 207982cd038dSYoshinobu Inoue */ 20804fb3a820SAlexander V. Chernikov linkhdrsize = sizeof(linkhdr); 20814fb3a820SAlexander V. Chernikov if (lltable_calc_llheader(ifp, AF_INET6, lladdr, 20824fb3a820SAlexander V. Chernikov linkhdr, &linkhdrsize, &lladdr_off) != 0) 20834fb3a820SAlexander V. Chernikov return; 20844fb3a820SAlexander V. Chernikov 20854fb3a820SAlexander V. Chernikov if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize, 20864fb3a820SAlexander V. Chernikov lladdr_off) == 0) { 208712cb7521SAlexander V. Chernikov /* Entry was deleted */ 208812cb7521SAlexander V. Chernikov return; 208912cb7521SAlexander V. Chernikov } 209012cb7521SAlexander V. Chernikov 2091aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); 209282cd038dSYoshinobu Inoue 2093501adf01SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 209482cd038dSYoshinobu Inoue 2095d7968c29SAlexander V. Chernikov if (ln->la_hold != NULL) 2096d7968c29SAlexander V. Chernikov nd6_grab_holdchain(ln, &chain, &sin6); 209782cd038dSYoshinobu Inoue } 209882cd038dSYoshinobu Inoue 20990e2dcee6SAlexander V. Chernikov /* Calculates new router status */ 21000e2dcee6SAlexander V. Chernikov router = nd6_is_router(type, code, is_newentry, olladdr, 21010e2dcee6SAlexander V. Chernikov lladdr != NULL ? 1 : 0, ln->ln_router); 210282cd038dSYoshinobu Inoue 21030e2dcee6SAlexander V. Chernikov ln->ln_router = router; 21040e2dcee6SAlexander V. Chernikov /* Mark non-router redirects with special flag */ 21050e2dcee6SAlexander V. Chernikov if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER) 21060e2dcee6SAlexander V. Chernikov ln->la_flags |= LLE_REDIRECT; 2107c2b3a02bSKip Macy 2108f506d933SAlexander V. Chernikov if (flags & LLE_EXCLUSIVE) 21096e6b3f7cSQing Li LLE_WUNLOCK(ln); 21106e6b3f7cSQing Li else 21116e6b3f7cSQing Li LLE_RUNLOCK(ln); 21120e2dcee6SAlexander V. Chernikov 2113d7968c29SAlexander V. Chernikov if (chain != NULL) 2114151ba793SAlexander Kabaev nd6_flush_holdchain(ifp, chain, &sin6); 21156e6b3f7cSQing Li 2116554bf4aaSHajimu UMEMOTO /* 2117554bf4aaSHajimu UMEMOTO * When the link-layer address of a router changes, select the 2118554bf4aaSHajimu UMEMOTO * best router again. In particular, when the neighbor entry is newly 2119554bf4aaSHajimu UMEMOTO * created, it might affect the selection policy. 2120554bf4aaSHajimu UMEMOTO * Question: can we restrict the first condition to the "is_newentry" 2121554bf4aaSHajimu UMEMOTO * case? 2122554bf4aaSHajimu UMEMOTO * XXX: when we hear an RA from a new router with the link-layer 2123559b4296SAlan Somers * address option, defrouter_select_fib() is called twice, since 2124554bf4aaSHajimu UMEMOTO * defrtrlist_update called the function as well. However, I believe 2125554bf4aaSHajimu UMEMOTO * we can compromise the overhead, since it only happens the first 2126554bf4aaSHajimu UMEMOTO * time. 2127559b4296SAlan Somers * XXX: although defrouter_select_fib() should not have a bad effect 2128554bf4aaSHajimu UMEMOTO * for those are not autoconfigured hosts, we explicitly avoid such 2129554bf4aaSHajimu UMEMOTO * cases for safety. 2130554bf4aaSHajimu UMEMOTO */ 2131501adf01SAlexander V. Chernikov if ((do_update || is_newentry) && router && 2132a283298cSHiroki Sato ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 21336e6b3f7cSQing Li /* 21346e6b3f7cSQing Li * guaranteed recursion 21356e6b3f7cSQing Li */ 2136559b4296SAlan Somers defrouter_select_fib(ifp->if_fib); 21376e6b3f7cSQing Li } 213882cd038dSYoshinobu Inoue } 213982cd038dSYoshinobu Inoue 214082cd038dSYoshinobu Inoue static void 21418b615593SMarko Zec nd6_slowtimo(void *arg) 214282cd038dSYoshinobu Inoue { 2143a68cc388SGleb Smirnoff struct epoch_tracker et; 21448b615593SMarko Zec CURVNET_SET((struct vnet *) arg); 214533841545SHajimu UMEMOTO struct nd_ifinfo *nd6if; 214631b1bfe1SHajimu UMEMOTO struct ifnet *ifp; 214782cd038dSYoshinobu Inoue 2148603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 2149f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 2150a68cc388SGleb Smirnoff NET_EPOCH_ENTER(et); 21514f6c66ccSMatt Macy CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 21520de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 21530de0dd9bSHiroki Sato continue; 215431b1bfe1SHajimu UMEMOTO nd6if = ND_IFINFO(ifp); 215582cd038dSYoshinobu Inoue if (nd6if->basereachable && /* already initialized */ 215682cd038dSYoshinobu Inoue (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 215782cd038dSYoshinobu Inoue /* 215882cd038dSYoshinobu Inoue * Since reachable time rarely changes by router 215982cd038dSYoshinobu Inoue * advertisements, we SHOULD insure that a new random 216082cd038dSYoshinobu Inoue * value gets recomputed at least once every few hours. 216182cd038dSYoshinobu Inoue * (RFC 2461, 6.3.4) 216282cd038dSYoshinobu Inoue */ 2163603724d3SBjoern A. Zeeb nd6if->recalctm = V_nd6_recalc_reachtm_interval; 216482cd038dSYoshinobu Inoue nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 216582cd038dSYoshinobu Inoue } 216682cd038dSYoshinobu Inoue } 2167a68cc388SGleb Smirnoff NET_EPOCH_EXIT(et); 21688b615593SMarko Zec CURVNET_RESTORE(); 216982cd038dSYoshinobu Inoue } 217082cd038dSYoshinobu Inoue 2171d7968c29SAlexander V. Chernikov void 2172d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain, 2173d7968c29SAlexander V. Chernikov struct sockaddr_in6 *sin6) 2174d7968c29SAlexander V. Chernikov { 2175d7968c29SAlexander V. Chernikov 2176d7968c29SAlexander V. Chernikov LLE_WLOCK_ASSERT(ln); 2177d7968c29SAlexander V. Chernikov 2178d7968c29SAlexander V. Chernikov *chain = ln->la_hold; 2179d7968c29SAlexander V. Chernikov ln->la_hold = NULL; 2180314294deSAlexander V. Chernikov lltable_fill_sa_entry(ln, (struct sockaddr *)sin6); 2181d7968c29SAlexander V. Chernikov 2182d7968c29SAlexander V. Chernikov if (ln->ln_state == ND6_LLINFO_STALE) { 2183d7968c29SAlexander V. Chernikov 2184d7968c29SAlexander V. Chernikov /* 2185d7968c29SAlexander V. Chernikov * The first time we send a packet to a 2186d7968c29SAlexander V. Chernikov * neighbor whose entry is STALE, we have 2187d7968c29SAlexander V. Chernikov * to change the state to DELAY and a sets 2188d7968c29SAlexander V. Chernikov * a timer to expire in DELAY_FIRST_PROBE_TIME 2189d7968c29SAlexander V. Chernikov * seconds to ensure do neighbor unreachability 2190d7968c29SAlexander V. Chernikov * detection on expiration. 2191d7968c29SAlexander V. Chernikov * (RFC 2461 7.3.3) 2192d7968c29SAlexander V. Chernikov */ 2193aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY); 2194d7968c29SAlexander V. Chernikov } 2195d7968c29SAlexander V. Chernikov } 2196d7968c29SAlexander V. Chernikov 21971fe201c3SAlexander V. Chernikov int 2198d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m, 2199637670e7SAlexander V. Chernikov struct sockaddr_in6 *dst, struct route *ro) 2200d7968c29SAlexander V. Chernikov { 2201d7968c29SAlexander V. Chernikov int error; 2202d7968c29SAlexander V. Chernikov int ip6len; 2203d7968c29SAlexander V. Chernikov struct ip6_hdr *ip6; 2204d7968c29SAlexander V. Chernikov struct m_tag *mtag; 2205d7968c29SAlexander V. Chernikov 2206d7968c29SAlexander V. Chernikov #ifdef MAC 2207d7968c29SAlexander V. Chernikov mac_netinet6_nd6_send(ifp, m); 2208d7968c29SAlexander V. Chernikov #endif 2209d7968c29SAlexander V. Chernikov 2210d7968c29SAlexander V. Chernikov /* 2211d7968c29SAlexander V. Chernikov * If called from nd6_ns_output() (NS), nd6_na_output() (NA), 2212d7968c29SAlexander V. Chernikov * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA 2213d7968c29SAlexander V. Chernikov * as handled by rtsol and rtadvd), mbufs will be tagged for SeND 2214d7968c29SAlexander V. Chernikov * to be diverted to user space. When re-injected into the kernel, 2215d7968c29SAlexander V. Chernikov * send_output() will directly dispatch them to the outgoing interface. 2216d7968c29SAlexander V. Chernikov */ 2217d7968c29SAlexander V. Chernikov if (send_sendso_input_hook != NULL) { 2218d7968c29SAlexander V. Chernikov mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL); 2219d7968c29SAlexander V. Chernikov if (mtag != NULL) { 2220d7968c29SAlexander V. Chernikov ip6 = mtod(m, struct ip6_hdr *); 2221d7968c29SAlexander V. Chernikov ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 2222d7968c29SAlexander V. Chernikov /* Use the SEND socket */ 2223d7968c29SAlexander V. Chernikov error = send_sendso_input_hook(m, ifp, SND_OUT, 2224d7968c29SAlexander V. Chernikov ip6len); 2225d7968c29SAlexander V. Chernikov /* -1 == no app on SEND socket */ 2226d7968c29SAlexander V. Chernikov if (error == 0 || error != -1) 2227d7968c29SAlexander V. Chernikov return (error); 2228d7968c29SAlexander V. Chernikov } 2229d7968c29SAlexander V. Chernikov } 2230d7968c29SAlexander V. Chernikov 2231d7968c29SAlexander V. Chernikov m_clrprotoflags(m); /* Avoid confusing lower layers. */ 2232d7968c29SAlexander V. Chernikov IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL, 2233d7968c29SAlexander V. Chernikov mtod(m, struct ip6_hdr *)); 2234d7968c29SAlexander V. Chernikov 2235d7968c29SAlexander V. Chernikov if ((ifp->if_flags & IFF_LOOPBACK) == 0) 2236d7968c29SAlexander V. Chernikov origifp = ifp; 2237d7968c29SAlexander V. Chernikov 2238637670e7SAlexander V. Chernikov error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro); 2239d7968c29SAlexander V. Chernikov return (error); 2240d7968c29SAlexander V. Chernikov } 2241d7968c29SAlexander V. Chernikov 2242f6990c4eSAlexander V. Chernikov /* 22434fb3a820SAlexander V. Chernikov * Lookup link headerfor @sa_dst address. Stores found 22444fb3a820SAlexander V. Chernikov * data in @desten buffer. Copy of lle ln_flags can be also 22451fe201c3SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 22461fe201c3SAlexander V. Chernikov * 22471fe201c3SAlexander V. Chernikov * If destination LLE does not exists or lle state modification 22481fe201c3SAlexander V. Chernikov * is required, call "slow" version. 22491fe201c3SAlexander V. Chernikov * 22501fe201c3SAlexander V. Chernikov * Return values: 22511fe201c3SAlexander V. Chernikov * - 0 on success (address copied to buffer). 22521fe201c3SAlexander V. Chernikov * - EWOULDBLOCK (no local error, but address is still unresolved) 22531fe201c3SAlexander V. Chernikov * - other errors (alloc failure, etc) 2254f6990c4eSAlexander V. Chernikov */ 225582cd038dSYoshinobu Inoue int 22561fe201c3SAlexander V. Chernikov nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 22576d768226SGeorge V. Neville-Neil const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags, 22586d768226SGeorge V. Neville-Neil struct llentry **plle) 225982cd038dSYoshinobu Inoue { 2260f6990c4eSAlexander V. Chernikov struct llentry *ln = NULL; 22611fe201c3SAlexander V. Chernikov const struct sockaddr_in6 *dst6; 22621fe201c3SAlexander V. Chernikov 2263b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 2264b8a6e03fSGleb Smirnoff 22651fe201c3SAlexander V. Chernikov if (pflags != NULL) 22661fe201c3SAlexander V. Chernikov *pflags = 0; 22671fe201c3SAlexander V. Chernikov 22681fe201c3SAlexander V. Chernikov dst6 = (const struct sockaddr_in6 *)sa_dst; 22696e6b3f7cSQing Li 2270f6990c4eSAlexander V. Chernikov /* discard the packet if IPv6 operation is disabled on the interface */ 2271f6990c4eSAlexander V. Chernikov if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) { 2272f6990c4eSAlexander V. Chernikov m_freem(m); 2273f6990c4eSAlexander V. Chernikov return (ENETDOWN); /* better error? */ 2274f6990c4eSAlexander V. Chernikov } 2275f6990c4eSAlexander V. Chernikov 22761fe201c3SAlexander V. Chernikov if (m != NULL && m->m_flags & M_MCAST) { 22771fe201c3SAlexander V. Chernikov switch (ifp->if_type) { 22781fe201c3SAlexander V. Chernikov case IFT_ETHER: 22791fe201c3SAlexander V. Chernikov case IFT_L2VLAN: 22801fe201c3SAlexander V. Chernikov case IFT_BRIDGE: 22811fe201c3SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr, 22821fe201c3SAlexander V. Chernikov desten); 22831fe201c3SAlexander V. Chernikov return (0); 22841fe201c3SAlexander V. Chernikov default: 22851fe201c3SAlexander V. Chernikov m_freem(m); 22861fe201c3SAlexander V. Chernikov return (EAFNOSUPPORT); 22871fe201c3SAlexander V. Chernikov } 22881fe201c3SAlexander V. Chernikov } 2289f6990c4eSAlexander V. Chernikov 2290ea17754cSMike Karels ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED, 2291ea17754cSMike Karels ifp); 229212cb7521SAlexander V. Chernikov if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) { 229312cb7521SAlexander V. Chernikov /* Entry found, let's copy lle info */ 22944fb3a820SAlexander V. Chernikov bcopy(ln->r_linkdata, desten, ln->r_hdrlen); 22951fe201c3SAlexander V. Chernikov if (pflags != NULL) 229612cb7521SAlexander V. Chernikov *pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR); 229712cb7521SAlexander V. Chernikov /* Check if we have feedback request from nd6 timer */ 229812cb7521SAlexander V. Chernikov if (ln->r_skip_req != 0) { 229912cb7521SAlexander V. Chernikov LLE_REQ_LOCK(ln); 230012cb7521SAlexander V. Chernikov ln->r_skip_req = 0; /* Notify that entry was used */ 230112cb7521SAlexander V. Chernikov ln->lle_hittime = time_uptime; 230212cb7521SAlexander V. Chernikov LLE_REQ_UNLOCK(ln); 230312cb7521SAlexander V. Chernikov } 2304ea17754cSMike Karels if (plle) { 2305ea17754cSMike Karels LLE_ADDREF(ln); 2306ea17754cSMike Karels *plle = ln; 2307ea17754cSMike Karels LLE_WUNLOCK(ln); 2308ea17754cSMike Karels } 23091fe201c3SAlexander V. Chernikov return (0); 2310ea17754cSMike Karels } else if (plle && ln) 2311ea17754cSMike Karels LLE_WUNLOCK(ln); 231212cb7521SAlexander V. Chernikov 23136d768226SGeorge V. Neville-Neil return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle)); 231412cb7521SAlexander V. Chernikov } 23156e6b3f7cSQing Li 23166e6b3f7cSQing Li 23176e6b3f7cSQing Li /* 23181fe201c3SAlexander V. Chernikov * Do L2 address resolution for @sa_dst address. Stores found 23191fe201c3SAlexander V. Chernikov * address in @desten buffer. Copy of lle ln_flags can be also 23201fe201c3SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 23216e6b3f7cSQing Li * 23221fe201c3SAlexander V. Chernikov * Heavy version. 23231fe201c3SAlexander V. Chernikov * Function assume that destination LLE does not exist, 2324f506d933SAlexander V. Chernikov * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired. 2325c0b8aeaeSAlexander V. Chernikov * 2326c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 23276e6b3f7cSQing Li */ 2328c0b8aeaeSAlexander V. Chernikov static __noinline int 23294fb3a820SAlexander V. Chernikov nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m, 23306d768226SGeorge V. Neville-Neil const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags, 23316d768226SGeorge V. Neville-Neil struct llentry **plle) 23326e6b3f7cSQing Li { 23335a255516SAlexander V. Chernikov struct llentry *lle = NULL, *lle_tmp; 2334aa5f023eSAlexander V. Chernikov struct in6_addr *psrc, src; 23354fb3a820SAlexander V. Chernikov int send_ns, ll_len; 23364fb3a820SAlexander V. Chernikov char *lladdr; 233782cd038dSYoshinobu Inoue 2338b8a6e03fSGleb Smirnoff NET_EPOCH_ASSERT(); 2339b8a6e03fSGleb Smirnoff 234082cd038dSYoshinobu Inoue /* 234182cd038dSYoshinobu Inoue * Address resolution or Neighbor Unreachability Detection 234282cd038dSYoshinobu Inoue * for the next hop. 234382cd038dSYoshinobu Inoue * At this point, the destination of the packet must be a unicast 234482cd038dSYoshinobu Inoue * or an anycast address(i.e. not a multicast). 234582cd038dSYoshinobu Inoue */ 2346f6990c4eSAlexander V. Chernikov if (lle == NULL) { 2347f506d933SAlexander V. Chernikov lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp); 2348f6990c4eSAlexander V. Chernikov if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp)) { 2349686cdd19SJun-ichiro itojun Hagino /* 2350686cdd19SJun-ichiro itojun Hagino * Since nd6_is_addr_neighbor() internally calls nd6_lookup(), 2351686cdd19SJun-ichiro itojun Hagino * the condition below is not very efficient. But we believe 2352686cdd19SJun-ichiro itojun Hagino * it is tolerable, because this should be a rare case. 2353686cdd19SJun-ichiro itojun Hagino */ 23545a255516SAlexander V. Chernikov lle = nd6_alloc(&dst->sin6_addr, 0, ifp); 2355f6990c4eSAlexander V. Chernikov if (lle == NULL) { 23561d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 2357686cdd19SJun-ichiro itojun Hagino log(LOG_DEBUG, 2358686cdd19SJun-ichiro itojun Hagino "nd6_output: can't allocate llinfo for %s " 2359bbd8aebaSQing Li "(ln=%p)\n", 2360f6990c4eSAlexander V. Chernikov ip6_sprintf(ip6buf, &dst->sin6_addr), lle); 23619dffa6a3SAlexander V. Chernikov m_freem(m); 23629dffa6a3SAlexander V. Chernikov return (ENOBUFS); 236382cd038dSYoshinobu Inoue } 23645a255516SAlexander V. Chernikov 23655a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 23665a255516SAlexander V. Chernikov LLE_WLOCK(lle); 23675a255516SAlexander V. Chernikov /* Prefer any existing entry over newly-created one */ 2368f506d933SAlexander V. Chernikov lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp); 23695a255516SAlexander V. Chernikov if (lle_tmp == NULL) 23705a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), lle); 23715a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 23725a255516SAlexander V. Chernikov if (lle_tmp != NULL) { 23735a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), lle); 23745a255516SAlexander V. Chernikov lle = lle_tmp; 23755a255516SAlexander V. Chernikov lle_tmp = NULL; 23765a255516SAlexander V. Chernikov } 23775a255516SAlexander V. Chernikov } 23785a255516SAlexander V. Chernikov } 23795a255516SAlexander V. Chernikov if (lle == NULL) { 23801fe201c3SAlexander V. Chernikov if (!(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) { 23815a255516SAlexander V. Chernikov m_freem(m); 23825a255516SAlexander V. Chernikov return (ENOBUFS); 23835a255516SAlexander V. Chernikov } 23841fe201c3SAlexander V. Chernikov 23851fe201c3SAlexander V. Chernikov if (m != NULL) 23861fe201c3SAlexander V. Chernikov m_freem(m); 23871fe201c3SAlexander V. Chernikov return (ENOBUFS); 2388686cdd19SJun-ichiro itojun Hagino } 2389686cdd19SJun-ichiro itojun Hagino 2390f6990c4eSAlexander V. Chernikov LLE_WLOCK_ASSERT(lle); 2391f6990c4eSAlexander V. Chernikov 239282cd038dSYoshinobu Inoue /* 239382cd038dSYoshinobu Inoue * The first time we send a packet to a neighbor whose entry is 239482cd038dSYoshinobu Inoue * STALE, we have to change the state to DELAY and a sets a timer to 239582cd038dSYoshinobu Inoue * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 239682cd038dSYoshinobu Inoue * neighbor unreachability detection on expiration. 239782cd038dSYoshinobu Inoue * (RFC 2461 7.3.3) 239882cd038dSYoshinobu Inoue */ 2399aa5f023eSAlexander V. Chernikov if (lle->ln_state == ND6_LLINFO_STALE) 2400aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY); 240182cd038dSYoshinobu Inoue 240282cd038dSYoshinobu Inoue /* 240382cd038dSYoshinobu Inoue * If the neighbor cache entry has a state other than INCOMPLETE 240488ff5695SSUZUKI Shinsuke * (i.e. its link-layer address is already resolved), just 240582cd038dSYoshinobu Inoue * send the packet. 240682cd038dSYoshinobu Inoue */ 24071fe201c3SAlexander V. Chernikov if (lle->ln_state > ND6_LLINFO_INCOMPLETE) { 24084fb3a820SAlexander V. Chernikov if (flags & LLE_ADDRONLY) { 24094fb3a820SAlexander V. Chernikov lladdr = lle->ll_addr; 24104fb3a820SAlexander V. Chernikov ll_len = ifp->if_addrlen; 24114fb3a820SAlexander V. Chernikov } else { 24124fb3a820SAlexander V. Chernikov lladdr = lle->r_linkdata; 24134fb3a820SAlexander V. Chernikov ll_len = lle->r_hdrlen; 24144fb3a820SAlexander V. Chernikov } 24154fb3a820SAlexander V. Chernikov bcopy(lladdr, desten, ll_len); 24161fe201c3SAlexander V. Chernikov if (pflags != NULL) 24171fe201c3SAlexander V. Chernikov *pflags = lle->la_flags; 24186d768226SGeorge V. Neville-Neil if (plle) { 24196d768226SGeorge V. Neville-Neil LLE_ADDREF(lle); 24206d768226SGeorge V. Neville-Neil *plle = lle; 24216d768226SGeorge V. Neville-Neil } 24221fe201c3SAlexander V. Chernikov LLE_WUNLOCK(lle); 24231fe201c3SAlexander V. Chernikov return (0); 24241fe201c3SAlexander V. Chernikov } 242582cd038dSYoshinobu Inoue 242682cd038dSYoshinobu Inoue /* 242782cd038dSYoshinobu Inoue * There is a neighbor cache entry, but no ethernet address 2428743eee66SSUZUKI Shinsuke * response yet. Append this latest packet to the end of the 2429b0ab3725SLuiz Otavio O Souza * packet queue in the mbuf. When it exceeds nd6_maxqueuelen, 2430743eee66SSUZUKI Shinsuke * the oldest packet in the queue will be removed. 243182cd038dSYoshinobu Inoue */ 24326e6b3f7cSQing Li 2433f6990c4eSAlexander V. Chernikov if (lle->la_hold != NULL) { 2434743eee66SSUZUKI Shinsuke struct mbuf *m_hold; 2435743eee66SSUZUKI Shinsuke int i; 2436743eee66SSUZUKI Shinsuke 2437743eee66SSUZUKI Shinsuke i = 0; 2438f6990c4eSAlexander V. Chernikov for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){ 2439743eee66SSUZUKI Shinsuke i++; 2440743eee66SSUZUKI Shinsuke if (m_hold->m_nextpkt == NULL) { 2441743eee66SSUZUKI Shinsuke m_hold->m_nextpkt = m; 2442743eee66SSUZUKI Shinsuke break; 244382cd038dSYoshinobu Inoue } 244482cd038dSYoshinobu Inoue } 2445603724d3SBjoern A. Zeeb while (i >= V_nd6_maxqueuelen) { 2446f6990c4eSAlexander V. Chernikov m_hold = lle->la_hold; 2447f6990c4eSAlexander V. Chernikov lle->la_hold = lle->la_hold->m_nextpkt; 244831d4137bSSUZUKI Shinsuke m_freem(m_hold); 2449743eee66SSUZUKI Shinsuke i--; 2450743eee66SSUZUKI Shinsuke } 2451743eee66SSUZUKI Shinsuke } else { 2452f6990c4eSAlexander V. Chernikov lle->la_hold = m; 24536e6b3f7cSQing Li } 2454743eee66SSUZUKI Shinsuke 2455743eee66SSUZUKI Shinsuke /* 2456743eee66SSUZUKI Shinsuke * If there has been no NS for the neighbor after entering the 2457743eee66SSUZUKI Shinsuke * INCOMPLETE state, send the first solicitation. 2458aa5f023eSAlexander V. Chernikov * Note that for newly-created lle la_asked will be 0, 2459aa5f023eSAlexander V. Chernikov * so we will transition from ND6_LLINFO_NOSTATE to 2460aa5f023eSAlexander V. Chernikov * ND6_LLINFO_INCOMPLETE state here. 2461743eee66SSUZUKI Shinsuke */ 2462aa5f023eSAlexander V. Chernikov psrc = NULL; 2463aa5f023eSAlexander V. Chernikov send_ns = 0; 2464aa5f023eSAlexander V. Chernikov if (lle->la_asked == 0) { 2465f6990c4eSAlexander V. Chernikov lle->la_asked++; 2466aa5f023eSAlexander V. Chernikov send_ns = 1; 246726deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(lle, &src); 2468aa5f023eSAlexander V. Chernikov 2469aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE); 2470743eee66SSUZUKI Shinsuke } 2471aa5f023eSAlexander V. Chernikov LLE_WUNLOCK(lle); 2472aa5f023eSAlexander V. Chernikov if (send_ns != 0) 2473aa5f023eSAlexander V. Chernikov nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL); 2474e6950476SBjoern A. Zeeb 24751fe201c3SAlexander V. Chernikov return (EWOULDBLOCK); 247682cd038dSYoshinobu Inoue } 247782cd038dSYoshinobu Inoue 24784fb3a820SAlexander V. Chernikov /* 24794fb3a820SAlexander V. Chernikov * Do L2 address resolution for @sa_dst address. Stores found 24804fb3a820SAlexander V. Chernikov * address in @desten buffer. Copy of lle ln_flags can be also 24814fb3a820SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 24824fb3a820SAlexander V. Chernikov * 24834fb3a820SAlexander V. Chernikov * Return values: 24844fb3a820SAlexander V. Chernikov * - 0 on success (address copied to buffer). 24854fb3a820SAlexander V. Chernikov * - EWOULDBLOCK (no local error, but address is still unresolved) 24864fb3a820SAlexander V. Chernikov * - other errors (alloc failure, etc) 24874fb3a820SAlexander V. Chernikov */ 24884fb3a820SAlexander V. Chernikov int 24894fb3a820SAlexander V. Chernikov nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst, 24904fb3a820SAlexander V. Chernikov char *desten, uint32_t *pflags) 24914fb3a820SAlexander V. Chernikov { 24924fb3a820SAlexander V. Chernikov int error; 24934fb3a820SAlexander V. Chernikov 24944fb3a820SAlexander V. Chernikov flags |= LLE_ADDRONLY; 24954fb3a820SAlexander V. Chernikov error = nd6_resolve_slow(ifp, flags, NULL, 24966d768226SGeorge V. Neville-Neil (const struct sockaddr_in6 *)dst, desten, pflags, NULL); 24974fb3a820SAlexander V. Chernikov return (error); 24984fb3a820SAlexander V. Chernikov } 24996e6b3f7cSQing Li 25006e6b3f7cSQing Li int 2501151ba793SAlexander Kabaev nd6_flush_holdchain(struct ifnet *ifp, struct mbuf *chain, 25029c9bde01SAlexander V. Chernikov struct sockaddr_in6 *dst) 25036e6b3f7cSQing Li { 25046e6b3f7cSQing Li struct mbuf *m, *m_head; 25056e6b3f7cSQing Li int error = 0; 25066e6b3f7cSQing Li 25076e6b3f7cSQing Li m_head = chain; 25086e6b3f7cSQing Li 25096e6b3f7cSQing Li while (m_head) { 25106e6b3f7cSQing Li m = m_head; 25116e6b3f7cSQing Li m_head = m_head->m_nextpkt; 2512151ba793SAlexander Kabaev error = nd6_output_ifp(ifp, ifp, m, dst, NULL); 25136e6b3f7cSQing Li } 25146e6b3f7cSQing Li 25156e6b3f7cSQing Li /* 25166e6b3f7cSQing Li * XXX 25171fe201c3SAlexander V. Chernikov * note that intermediate errors are blindly ignored 25186e6b3f7cSQing Li */ 25196e6b3f7cSQing Li return (error); 25206e6b3f7cSQing Li } 25216e6b3f7cSQing Li 25221fe201c3SAlexander V. Chernikov static int 25231272577eSXin LI nd6_need_cache(struct ifnet *ifp) 252433841545SHajimu UMEMOTO { 252533841545SHajimu UMEMOTO /* 252633841545SHajimu UMEMOTO * XXX: we currently do not make neighbor cache on any interface 25273a4fc8a8SBrooks Davis * other than Ethernet and GIF. 252833841545SHajimu UMEMOTO * 252933841545SHajimu UMEMOTO * RFC2893 says: 253033841545SHajimu UMEMOTO * - unidirectional tunnels needs no ND 253133841545SHajimu UMEMOTO */ 253233841545SHajimu UMEMOTO switch (ifp->if_type) { 253333841545SHajimu UMEMOTO case IFT_ETHER: 253433841545SHajimu UMEMOTO case IFT_IEEE1394: 253505b6760dSMunechika SUMIKAWA case IFT_L2VLAN: 2536e4cd31ddSJeff Roberson case IFT_INFINIBAND: 253759280079SAndrew Thompson case IFT_BRIDGE: 2538c57086ceSHajimu UMEMOTO case IFT_PROPVIRTUAL: 253933841545SHajimu UMEMOTO return (1); 254033841545SHajimu UMEMOTO default: 254133841545SHajimu UMEMOTO return (0); 254233841545SHajimu UMEMOTO } 254333841545SHajimu UMEMOTO } 254433841545SHajimu UMEMOTO 25456e6b3f7cSQing Li /* 2546f6b84910SAlexander V. Chernikov * Add pernament ND6 link-layer record for given 2547f6b84910SAlexander V. Chernikov * interface address. 2548f6b84910SAlexander V. Chernikov * 2549f6b84910SAlexander V. Chernikov * Very similar to IPv4 arp_ifinit(), but: 2550f6b84910SAlexander V. Chernikov * 1) IPv6 DAD is performed in different place 2551f6b84910SAlexander V. Chernikov * 2) It is called by IPv6 protocol stack in contrast to 2552f6b84910SAlexander V. Chernikov * arp_ifinit() which is typically called in SIOCSIFADDR 2553f6b84910SAlexander V. Chernikov * driver ioctl handler. 2554f6b84910SAlexander V. Chernikov * 2555f6b84910SAlexander V. Chernikov */ 2556f6b84910SAlexander V. Chernikov int 2557f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia) 2558f6b84910SAlexander V. Chernikov { 2559f6b84910SAlexander V. Chernikov struct ifnet *ifp; 25605a255516SAlexander V. Chernikov struct llentry *ln, *ln_tmp; 25615a255516SAlexander V. Chernikov struct sockaddr *dst; 2562f6b84910SAlexander V. Chernikov 2563f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2564af6209a1SAndrey V. Elsukov if (nd6_need_cache(ifp) == 0) 2565af6209a1SAndrey V. Elsukov return (0); 25665a255516SAlexander V. Chernikov 2567f6b84910SAlexander V. Chernikov ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 25685a255516SAlexander V. Chernikov dst = (struct sockaddr *)&ia->ia_addr; 25695a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst); 25705a255516SAlexander V. Chernikov if (ln == NULL) 25715a255516SAlexander V. Chernikov return (ENOBUFS); 25725a255516SAlexander V. Chernikov 25735a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 25745a255516SAlexander V. Chernikov LLE_WLOCK(ln); 25755a255516SAlexander V. Chernikov /* Unlink any entry if exists */ 25765a255516SAlexander V. Chernikov ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst); 25775a255516SAlexander V. Chernikov if (ln_tmp != NULL) 25785a255516SAlexander V. Chernikov lltable_unlink_entry(LLTABLE6(ifp), ln_tmp); 25795a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 25805a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 25815a255516SAlexander V. Chernikov 25825a255516SAlexander V. Chernikov if (ln_tmp != NULL) 25835a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED); 25845a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 25855a255516SAlexander V. Chernikov 25865a255516SAlexander V. Chernikov LLE_WUNLOCK(ln); 25875a255516SAlexander V. Chernikov if (ln_tmp != NULL) 25885a255516SAlexander V. Chernikov llentry_free(ln_tmp); 25895a255516SAlexander V. Chernikov 25905a255516SAlexander V. Chernikov return (0); 2591f6b84910SAlexander V. Chernikov } 2592f6b84910SAlexander V. Chernikov 2593f6b84910SAlexander V. Chernikov /* 25943e7a2321SAlexander V. Chernikov * Removes either all lle entries for given @ia, or lle 25953e7a2321SAlexander V. Chernikov * corresponding to @ia address. 2596f6b84910SAlexander V. Chernikov */ 2597f6b84910SAlexander V. Chernikov void 25983e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all) 2599f6b84910SAlexander V. Chernikov { 2600f6b84910SAlexander V. Chernikov struct sockaddr_in6 mask, addr; 26013e7a2321SAlexander V. Chernikov struct sockaddr *saddr, *smask; 2602f6b84910SAlexander V. Chernikov struct ifnet *ifp; 2603f6b84910SAlexander V. Chernikov 2604f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2605f6b84910SAlexander V. Chernikov memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 2606f6b84910SAlexander V. Chernikov memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 26073e7a2321SAlexander V. Chernikov saddr = (struct sockaddr *)&addr; 26083e7a2321SAlexander V. Chernikov smask = (struct sockaddr *)&mask; 26093e7a2321SAlexander V. Chernikov 26103e7a2321SAlexander V. Chernikov if (all != 0) 26113e7a2321SAlexander V. Chernikov lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC); 26123e7a2321SAlexander V. Chernikov else 26133e7a2321SAlexander V. Chernikov lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr); 2614f6b84910SAlexander V. Chernikov } 2615f6b84910SAlexander V. Chernikov 261631d4137bSSUZUKI Shinsuke static void 26176e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln) 261831d4137bSSUZUKI Shinsuke { 261931d4137bSSUZUKI Shinsuke struct mbuf *m_hold, *m_hold_next; 262031d4137bSSUZUKI Shinsuke 26216e6b3f7cSQing Li for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) { 262231d4137bSSUZUKI Shinsuke m_hold_next = m_hold->m_nextpkt; 262331d4137bSSUZUKI Shinsuke m_freem(m_hold); 262431d4137bSSUZUKI Shinsuke } 262531d4137bSSUZUKI Shinsuke 26266e6b3f7cSQing Li ln->la_hold = NULL; 262731d4137bSSUZUKI Shinsuke } 262831d4137bSSUZUKI Shinsuke 262933841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS); 263033841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS); 263165fdf521SMark Johnston 263233841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6); 263365fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist, 263465fdf521SMark Johnston CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, 263565fdf521SMark Johnston NULL, 0, nd6_sysctl_drlist, "S,in6_defrouter", 263665fdf521SMark Johnston "NDP default router list"); 263765fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist, 263865fdf521SMark Johnston CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, 263965fdf521SMark Johnston NULL, 0, nd6_sysctl_prlist, "S,in6_prefix", 264065fdf521SMark Johnston "NDP prefix list"); 26416df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen, 2642d6e82913SSteven Hartland CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, ""); 26436df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer, 2644d6e82913SSteven Hartland CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), ""); 264533841545SHajimu UMEMOTO 264633841545SHajimu UMEMOTO static int 264733841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS) 264833841545SHajimu UMEMOTO { 26497195094cSMarius Strobl struct in6_defrouter d; 265033841545SHajimu UMEMOTO struct nd_defrouter *dr; 26517195094cSMarius Strobl int error; 265233841545SHajimu UMEMOTO 26534de485feSMark Johnston if (req->newptr != NULL) 26547195094cSMarius Strobl return (EPERM); 265533841545SHajimu UMEMOTO 26564de485feSMark Johnston error = sysctl_wire_old_buffer(req, 0); 26574de485feSMark Johnston if (error != 0) 26584de485feSMark Johnston return (error); 26594de485feSMark Johnston 26607195094cSMarius Strobl bzero(&d, sizeof(d)); 26617195094cSMarius Strobl d.rtaddr.sin6_family = AF_INET6; 26627195094cSMarius Strobl d.rtaddr.sin6_len = sizeof(d.rtaddr); 26637195094cSMarius Strobl 26644de485feSMark Johnston ND6_RLOCK(); 26653b0b2840SJohn Baldwin TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) { 26667195094cSMarius Strobl d.rtaddr.sin6_addr = dr->rtaddr; 26677195094cSMarius Strobl error = sa6_recoverscope(&d.rtaddr); 2668edbb8b46SPeter Wemm if (error != 0) 26694de485feSMark Johnston break; 267001869be5SMark Johnston d.flags = dr->raflags; 26717195094cSMarius Strobl d.rtlifetime = dr->rtlifetime; 2672ffa0165aSHiroki Sato d.expire = dr->expire + (time_second - time_uptime); 26737195094cSMarius Strobl d.if_index = dr->ifp->if_index; 26747195094cSMarius Strobl error = SYSCTL_OUT(req, &d, sizeof(d)); 26757195094cSMarius Strobl if (error != 0) 26764de485feSMark Johnston break; 267733841545SHajimu UMEMOTO } 26784de485feSMark Johnston ND6_RUNLOCK(); 26794de485feSMark Johnston return (error); 26807195094cSMarius Strobl } 268133841545SHajimu UMEMOTO 268233841545SHajimu UMEMOTO static int 268333841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS) 268433841545SHajimu UMEMOTO { 26857195094cSMarius Strobl struct in6_prefix p; 26867195094cSMarius Strobl struct sockaddr_in6 s6; 268733841545SHajimu UMEMOTO struct nd_prefix *pr; 26887195094cSMarius Strobl struct nd_pfxrouter *pfr; 26897195094cSMarius Strobl time_t maxexpire; 26907195094cSMarius Strobl int error; 26911d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 269233841545SHajimu UMEMOTO 269333841545SHajimu UMEMOTO if (req->newptr) 26947195094cSMarius Strobl return (EPERM); 269533841545SHajimu UMEMOTO 2696cc51be7bSMark Johnston error = sysctl_wire_old_buffer(req, 0); 2697cc51be7bSMark Johnston if (error != 0) 2698cc51be7bSMark Johnston return (error); 2699cc51be7bSMark Johnston 27007195094cSMarius Strobl bzero(&p, sizeof(p)); 27017195094cSMarius Strobl p.origin = PR_ORIG_RA; 27027195094cSMarius Strobl bzero(&s6, sizeof(s6)); 27037195094cSMarius Strobl s6.sin6_family = AF_INET6; 27047195094cSMarius Strobl s6.sin6_len = sizeof(s6); 27057195094cSMarius Strobl 2706cc51be7bSMark Johnston ND6_RLOCK(); 27073b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 27087195094cSMarius Strobl p.prefix = pr->ndpr_prefix; 27097195094cSMarius Strobl if (sa6_recoverscope(&p.prefix)) { 27107195094cSMarius Strobl log(LOG_ERR, "scope error in prefix list (%s)\n", 27117195094cSMarius Strobl ip6_sprintf(ip6buf, &p.prefix.sin6_addr)); 2712a1f7e5f8SHajimu UMEMOTO /* XXX: press on... */ 2713a1f7e5f8SHajimu UMEMOTO } 27147195094cSMarius Strobl p.raflags = pr->ndpr_raf; 27157195094cSMarius Strobl p.prefixlen = pr->ndpr_plen; 27167195094cSMarius Strobl p.vltime = pr->ndpr_vltime; 27177195094cSMarius Strobl p.pltime = pr->ndpr_pltime; 27187195094cSMarius Strobl p.if_index = pr->ndpr_ifp->if_index; 2719743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME) 27207195094cSMarius Strobl p.expire = 0; 2721743eee66SSUZUKI Shinsuke else { 2722743eee66SSUZUKI Shinsuke /* XXX: we assume time_t is signed. */ 2723743eee66SSUZUKI Shinsuke maxexpire = (-1) & 27247195094cSMarius Strobl ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 27257195094cSMarius Strobl if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate) 27267195094cSMarius Strobl p.expire = pr->ndpr_lastupdate + 2727ffa0165aSHiroki Sato pr->ndpr_vltime + 2728ffa0165aSHiroki Sato (time_second - time_uptime); 27297195094cSMarius Strobl else 27307195094cSMarius Strobl p.expire = maxexpire; 2731743eee66SSUZUKI Shinsuke } 27320bbf244eSMark Johnston p.refcnt = pr->ndpr_addrcnt; 27337195094cSMarius Strobl p.flags = pr->ndpr_stateflags; 27347195094cSMarius Strobl p.advrtrs = 0; 27357195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) 27367195094cSMarius Strobl p.advrtrs++; 27377195094cSMarius Strobl error = SYSCTL_OUT(req, &p, sizeof(p)); 27387195094cSMarius Strobl if (error != 0) 2739cc51be7bSMark Johnston break; 27407195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) { 27417195094cSMarius Strobl s6.sin6_addr = pfr->router->rtaddr; 27427195094cSMarius Strobl if (sa6_recoverscope(&s6)) 27437195094cSMarius Strobl log(LOG_ERR, 27447195094cSMarius Strobl "scope error in prefix list (%s)\n", 27457195094cSMarius Strobl ip6_sprintf(ip6buf, &pfr->router->rtaddr)); 27467195094cSMarius Strobl error = SYSCTL_OUT(req, &s6, sizeof(s6)); 27477195094cSMarius Strobl if (error != 0) 2748d748f7efSMark Johnston goto out; 2749cc51be7bSMark Johnston } 2750cc51be7bSMark Johnston } 2751d748f7efSMark Johnston out: 2752cc51be7bSMark Johnston ND6_RUNLOCK(); 27537195094cSMarius Strobl return (error); 27547195094cSMarius Strobl } 2755