1caf43b02SWarner Losh /*- 282cd038dSYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 382cd038dSYoshinobu Inoue * All rights reserved. 482cd038dSYoshinobu Inoue * 582cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 682cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 782cd038dSYoshinobu Inoue * are met: 882cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 982cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1082cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1182cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1282cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1382cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1482cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1582cd038dSYoshinobu Inoue * without specific prior written permission. 1682cd038dSYoshinobu Inoue * 1782cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1882cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1982cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2082cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2182cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2282cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2382cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2482cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2582cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2682cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2782cd038dSYoshinobu Inoue * SUCH DAMAGE. 28b48287a3SDavid E. O'Brien * 29b48287a3SDavid E. O'Brien * $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $ 3082cd038dSYoshinobu Inoue */ 3182cd038dSYoshinobu Inoue 32b48287a3SDavid E. O'Brien #include <sys/cdefs.h> 33b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$"); 34b48287a3SDavid E. O'Brien 35686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 36686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 37686cdd19SJun-ichiro itojun Hagino 3882cd038dSYoshinobu Inoue #include <sys/param.h> 3982cd038dSYoshinobu Inoue #include <sys/systm.h> 4033841545SHajimu UMEMOTO #include <sys/callout.h> 4182cd038dSYoshinobu Inoue #include <sys/malloc.h> 4282cd038dSYoshinobu Inoue #include <sys/mbuf.h> 4382cd038dSYoshinobu Inoue #include <sys/socket.h> 4482cd038dSYoshinobu Inoue #include <sys/sockio.h> 4582cd038dSYoshinobu Inoue #include <sys/time.h> 4682cd038dSYoshinobu Inoue #include <sys/kernel.h> 47686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h> 4882cd038dSYoshinobu Inoue #include <sys/errno.h> 4982cd038dSYoshinobu Inoue #include <sys/syslog.h> 506e6b3f7cSQing Li #include <sys/lock.h> 516e6b3f7cSQing Li #include <sys/rwlock.h> 5282cd038dSYoshinobu Inoue #include <sys/queue.h> 5357f60867SMark Johnston #include <sys/sdt.h> 5433841545SHajimu UMEMOTO #include <sys/sysctl.h> 5582cd038dSYoshinobu Inoue 5682cd038dSYoshinobu Inoue #include <net/if.h> 5776039bc8SGleb Smirnoff #include <net/if_var.h> 5831b3783cSHajimu UMEMOTO #include <net/if_arc.h> 5982cd038dSYoshinobu Inoue #include <net/if_dl.h> 6082cd038dSYoshinobu Inoue #include <net/if_types.h> 612049fdeeSMatthew N. Dodd #include <net/iso88025.h> 628e5fd461SMatthew N. Dodd #include <net/fddi.h> 6382cd038dSYoshinobu Inoue #include <net/route.h> 644b79449eSBjoern A. Zeeb #include <net/vnet.h> 6582cd038dSYoshinobu Inoue 6682cd038dSYoshinobu Inoue #include <netinet/in.h> 6757f60867SMark Johnston #include <netinet/in_kdtrace.h> 686e6b3f7cSQing Li #include <net/if_llatbl.h> 6982cd038dSYoshinobu Inoue #include <netinet/if_ether.h> 7082cd038dSYoshinobu Inoue #include <netinet6/in6_var.h> 71686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 7282cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h> 73a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 7482cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 75a283298cSHiroki Sato #include <netinet6/in6_ifattach.h> 76686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 771db8d1f8SAna Kukec #include <netinet6/send.h> 7882cd038dSYoshinobu Inoue 79743eee66SSUZUKI Shinsuke #include <sys/limits.h> 80743eee66SSUZUKI Shinsuke 81aed55708SRobert Watson #include <security/mac/mac_framework.h> 82aed55708SRobert Watson 8382cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */ 8482cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */ 8582cd038dSYoshinobu Inoue 8647e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s)) 8782cd038dSYoshinobu Inoue 885e0a6f31SMark Johnston MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery"); 895e0a6f31SMark Johnston 9082cea7e6SBjoern A. Zeeb /* timer values */ 9182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune) = 1; /* walk list every 1 seconds */ 9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay) = 5; /* delay first probe time 5 second */ 9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries) = 3; /* maximum unicast query */ 9482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries) = 3; /* maximum multicast query */ 9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1; /* use loopback interface for 9682cea7e6SBjoern A. Zeeb * local traffic */ 9782cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer) = (60 * 60 * 24); /* 1 day: garbage 9882cea7e6SBjoern A. Zeeb * collection timer */ 99686cdd19SJun-ichiro itojun Hagino 100686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */ 1013e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxndopt) = 10; /* max # of ND options allowed */ 10282cea7e6SBjoern A. Zeeb 10382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper 10482cea7e6SBjoern A. Zeeb * layer hints */ 1053e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved 10682cea7e6SBjoern A. Zeeb * ND entries */ 1071e77c105SRobert Watson #define V_nd6_maxndopt VNET(nd6_maxndopt) 1081e77c105SRobert Watson #define V_nd6_maxqueuelen VNET(nd6_maxqueuelen) 109686cdd19SJun-ichiro itojun Hagino 11082cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG 11182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1; 11282cea7e6SBjoern A. Zeeb #else 11382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0; 11482cea7e6SBjoern A. Zeeb #endif 11533841545SHajimu UMEMOTO 1164fb3a820SAlexander V. Chernikov static eventhandler_tag lle_event_eh, iflladdr_event_eh; 11730aee131SAndrey V. Elsukov 118eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter); 119eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix); 1204de485feSMark Johnston VNET_DEFINE(struct rwlock, nd6_lock); 12182cd038dSYoshinobu Inoue 12282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL; 1231e77c105SRobert Watson #define V_nd6_recalc_reachtm_interval VNET(nd6_recalc_reachtm_interval) 12444e33a07SMarko Zec 1251db8d1f8SAna Kukec int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int); 1261db8d1f8SAna Kukec 127f0316e1aSAlexander V. Chernikov static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *, 1286f56329aSXin LI struct ifnet *); 1299233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *); 1309233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *); 1319233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *); 132435bece4SMark Johnston static void nd6_free(struct llentry **, int); 13317a03656SEric van Gyzen static void nd6_free_redirect(const struct llentry *); 1349233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *); 1359b420b3dSAlexander V. Chernikov static void nd6_llinfo_settimer_locked(struct llentry *, long); 1366e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *); 137f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 1384fb3a820SAlexander V. Chernikov static int nd6_resolve_slow(struct ifnet *, int, struct mbuf *, 1396d768226SGeorge V. Neville-Neil const struct sockaddr_in6 *, u_char *, uint32_t *, struct llentry **); 1401fe201c3SAlexander V. Chernikov static int nd6_need_cache(struct ifnet *); 1411fe201c3SAlexander V. Chernikov 14233841545SHajimu UMEMOTO 1433e288e62SDimitry Andric static VNET_DEFINE(struct callout, nd6_slowtimo_ch); 1441e77c105SRobert Watson #define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch) 145eddfbb76SRobert Watson 146eddfbb76SRobert Watson VNET_DEFINE(struct callout, nd6_timer_ch); 1479901091eSBjoern A. Zeeb #define V_nd6_timer_ch VNET(nd6_timer_ch) 148eddfbb76SRobert Watson 14930aee131SAndrey V. Elsukov static void 15030aee131SAndrey V. Elsukov nd6_lle_event(void *arg __unused, struct llentry *lle, int evt) 15130aee131SAndrey V. Elsukov { 15230aee131SAndrey V. Elsukov struct rt_addrinfo rtinfo; 153314294deSAlexander V. Chernikov struct sockaddr_in6 dst; 15430aee131SAndrey V. Elsukov struct sockaddr_dl gw; 15530aee131SAndrey V. Elsukov struct ifnet *ifp; 15630aee131SAndrey V. Elsukov int type; 15730aee131SAndrey V. Elsukov 15830aee131SAndrey V. Elsukov LLE_WLOCK_ASSERT(lle); 15930aee131SAndrey V. Elsukov 160314294deSAlexander V. Chernikov if (lltable_get_af(lle->lle_tbl) != AF_INET6) 161314294deSAlexander V. Chernikov return; 162314294deSAlexander V. Chernikov 16330aee131SAndrey V. Elsukov switch (evt) { 16430aee131SAndrey V. Elsukov case LLENTRY_RESOLVED: 16530aee131SAndrey V. Elsukov type = RTM_ADD; 16630aee131SAndrey V. Elsukov KASSERT(lle->la_flags & LLE_VALID, 16730aee131SAndrey V. Elsukov ("%s: %p resolved but not valid?", __func__, lle)); 16830aee131SAndrey V. Elsukov break; 16930aee131SAndrey V. Elsukov case LLENTRY_EXPIRED: 17030aee131SAndrey V. Elsukov type = RTM_DELETE; 17130aee131SAndrey V. Elsukov break; 17230aee131SAndrey V. Elsukov default: 17330aee131SAndrey V. Elsukov return; 17430aee131SAndrey V. Elsukov } 17530aee131SAndrey V. Elsukov 176314294deSAlexander V. Chernikov ifp = lltable_get_ifp(lle->lle_tbl); 17730aee131SAndrey V. Elsukov 17830aee131SAndrey V. Elsukov bzero(&dst, sizeof(dst)); 17930aee131SAndrey V. Elsukov bzero(&gw, sizeof(gw)); 18030aee131SAndrey V. Elsukov bzero(&rtinfo, sizeof(rtinfo)); 181314294deSAlexander V. Chernikov lltable_fill_sa_entry(lle, (struct sockaddr *)&dst); 18230aee131SAndrey V. Elsukov dst.sin6_scope_id = in6_getscopezone(ifp, 183314294deSAlexander V. Chernikov in6_addrscope(&dst.sin6_addr)); 18430aee131SAndrey V. Elsukov gw.sdl_len = sizeof(struct sockaddr_dl); 18530aee131SAndrey V. Elsukov gw.sdl_family = AF_LINK; 18630aee131SAndrey V. Elsukov gw.sdl_alen = ifp->if_addrlen; 18730aee131SAndrey V. Elsukov gw.sdl_index = ifp->if_index; 18830aee131SAndrey V. Elsukov gw.sdl_type = ifp->if_type; 18930aee131SAndrey V. Elsukov if (evt == LLENTRY_RESOLVED) 1904fb3a820SAlexander V. Chernikov bcopy(lle->ll_addr, gw.sdl_data, ifp->if_addrlen); 19130aee131SAndrey V. Elsukov rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst; 19230aee131SAndrey V. Elsukov rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw; 19330aee131SAndrey V. Elsukov rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY; 19430aee131SAndrey V. Elsukov rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | ( 19530aee131SAndrey V. Elsukov type == RTM_ADD ? RTF_UP: 0), 0, RT_DEFAULT_FIB); 19630aee131SAndrey V. Elsukov } 19730aee131SAndrey V. Elsukov 1984fb3a820SAlexander V. Chernikov /* 1994fb3a820SAlexander V. Chernikov * A handler for interface link layer address change event. 2004fb3a820SAlexander V. Chernikov */ 2014fb3a820SAlexander V. Chernikov static void 2024fb3a820SAlexander V. Chernikov nd6_iflladdr(void *arg __unused, struct ifnet *ifp) 2034fb3a820SAlexander V. Chernikov { 2044fb3a820SAlexander V. Chernikov 2054fb3a820SAlexander V. Chernikov lltable_update_ifaddr(LLTABLE6(ifp)); 2064fb3a820SAlexander V. Chernikov } 2074fb3a820SAlexander V. Chernikov 20882cd038dSYoshinobu Inoue void 2091272577eSXin LI nd6_init(void) 21082cd038dSYoshinobu Inoue { 21182cd038dSYoshinobu Inoue 2124de485feSMark Johnston rw_init(&V_nd6_lock, "nd6"); 2134de485feSMark Johnston 21444e33a07SMarko Zec LIST_INIT(&V_nd_prefix); 21544e33a07SMarko Zec 216686cdd19SJun-ichiro itojun Hagino /* initialization of the default router list */ 217603724d3SBjoern A. Zeeb TAILQ_INIT(&V_nd_defrouter); 21882cea7e6SBjoern A. Zeeb 2199901091eSBjoern A. Zeeb /* Start timers. */ 220603724d3SBjoern A. Zeeb callout_init(&V_nd6_slowtimo_ch, 0); 221603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 222f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 223d6ad6a86SMark Johnston 2249901091eSBjoern A. Zeeb callout_init(&V_nd6_timer_ch, 0); 2259901091eSBjoern A. Zeeb callout_reset(&V_nd6_timer_ch, hz, nd6_timer, curvnet); 2269901091eSBjoern A. Zeeb 227d6ad6a86SMark Johnston nd6_dad_init(); 2284fb3a820SAlexander V. Chernikov if (IS_DEFAULT_VNET(curvnet)) { 22930aee131SAndrey V. Elsukov lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event, 23030aee131SAndrey V. Elsukov NULL, EVENTHANDLER_PRI_ANY); 2314fb3a820SAlexander V. Chernikov iflladdr_event_eh = EVENTHANDLER_REGISTER(iflladdr_event, 2324fb3a820SAlexander V. Chernikov nd6_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 2334fb3a820SAlexander V. Chernikov } 23482cd038dSYoshinobu Inoue } 23582cd038dSYoshinobu Inoue 236bc29160dSMarko Zec #ifdef VIMAGE 237bc29160dSMarko Zec void 238bc29160dSMarko Zec nd6_destroy() 239bc29160dSMarko Zec { 240bc29160dSMarko Zec 241bc29160dSMarko Zec callout_drain(&V_nd6_slowtimo_ch); 242bc29160dSMarko Zec callout_drain(&V_nd6_timer_ch); 2434fb3a820SAlexander V. Chernikov if (IS_DEFAULT_VNET(curvnet)) { 24430aee131SAndrey V. Elsukov EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh); 2454fb3a820SAlexander V. Chernikov EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_event_eh); 2464fb3a820SAlexander V. Chernikov } 2474de485feSMark Johnston rw_destroy(&V_nd6_lock); 248bc29160dSMarko Zec } 249bc29160dSMarko Zec #endif 250bc29160dSMarko Zec 25131b1bfe1SHajimu UMEMOTO struct nd_ifinfo * 2521272577eSXin LI nd6_ifattach(struct ifnet *ifp) 25382cd038dSYoshinobu Inoue { 25431b1bfe1SHajimu UMEMOTO struct nd_ifinfo *nd; 25582cd038dSYoshinobu Inoue 256fc315641SMark Johnston nd = malloc(sizeof(*nd), M_IP6NDP, M_WAITOK | M_ZERO); 25731b1bfe1SHajimu UMEMOTO nd->initialized = 1; 25882cd038dSYoshinobu Inoue 25931b1bfe1SHajimu UMEMOTO nd->chlim = IPV6_DEFHLIM; 26031b1bfe1SHajimu UMEMOTO nd->basereachable = REACHABLE_TIME; 26131b1bfe1SHajimu UMEMOTO nd->reachable = ND_COMPUTE_RTIME(nd->basereachable); 26231b1bfe1SHajimu UMEMOTO nd->retrans = RETRANS_TIMER; 263a283298cSHiroki Sato 264a283298cSHiroki Sato nd->flags = ND6_IFF_PERFORMNUD; 265a283298cSHiroki Sato 266af805644SHiroki Sato /* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL. 267af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by 268af805644SHiroki Sato * default regardless of the V_ip6_auto_linklocal configuration to 269af805644SHiroki Sato * give a reasonable default behavior. 270af805644SHiroki Sato */ 271af805644SHiroki Sato if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) || 272af805644SHiroki Sato (ifp->if_flags & IFF_LOOPBACK)) 273a283298cSHiroki Sato nd->flags |= ND6_IFF_AUTO_LINKLOCAL; 274af805644SHiroki Sato /* 275af805644SHiroki Sato * A loopback interface does not need to accept RTADV. 276af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by 277af805644SHiroki Sato * default regardless of the V_ip6_accept_rtadv configuration to 278af805644SHiroki Sato * prevent the interface from accepting RA messages arrived 279af805644SHiroki Sato * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV. 280af805644SHiroki Sato */ 281af805644SHiroki Sato if (V_ip6_accept_rtadv && 282af805644SHiroki Sato !(ifp->if_flags & IFF_LOOPBACK) && 283af805644SHiroki Sato (ifp->if_type != IFT_BRIDGE)) 284a283298cSHiroki Sato nd->flags |= ND6_IFF_ACCEPT_RTADV; 285e7fa8d0aSHiroki Sato if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK)) 286e7fa8d0aSHiroki Sato nd->flags |= ND6_IFF_NO_RADR; 28731b1bfe1SHajimu UMEMOTO 28831b1bfe1SHajimu UMEMOTO /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */ 28931b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, nd); 29031b1bfe1SHajimu UMEMOTO 29131b1bfe1SHajimu UMEMOTO return nd; 29231b1bfe1SHajimu UMEMOTO } 29331b1bfe1SHajimu UMEMOTO 29431b1bfe1SHajimu UMEMOTO void 29589856f7eSBjoern A. Zeeb nd6_ifdetach(struct ifnet *ifp, struct nd_ifinfo *nd) 29631b1bfe1SHajimu UMEMOTO { 29789856f7eSBjoern A. Zeeb struct ifaddr *ifa, *next; 29889856f7eSBjoern A. Zeeb 29989856f7eSBjoern A. Zeeb IF_ADDR_RLOCK(ifp); 30089856f7eSBjoern A. Zeeb TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 30189856f7eSBjoern A. Zeeb if (ifa->ifa_addr->sa_family != AF_INET6) 30289856f7eSBjoern A. Zeeb continue; 30389856f7eSBjoern A. Zeeb 30489856f7eSBjoern A. Zeeb /* stop DAD processing */ 30589856f7eSBjoern A. Zeeb nd6_dad_stop(ifa); 30689856f7eSBjoern A. Zeeb } 30789856f7eSBjoern A. Zeeb IF_ADDR_RUNLOCK(ifp); 30831b1bfe1SHajimu UMEMOTO 30931b1bfe1SHajimu UMEMOTO free(nd, M_IP6NDP); 31082cd038dSYoshinobu Inoue } 31182cd038dSYoshinobu Inoue 31282cd038dSYoshinobu Inoue /* 31382cd038dSYoshinobu Inoue * Reset ND level link MTU. This function is called when the physical MTU 31482cd038dSYoshinobu Inoue * changes, which means we might have to adjust the ND level MTU. 31582cd038dSYoshinobu Inoue */ 31682cd038dSYoshinobu Inoue void 3171272577eSXin LI nd6_setmtu(struct ifnet *ifp) 31882cd038dSYoshinobu Inoue { 3197e037c12SKristof Provost if (ifp->if_afdata[AF_INET6] == NULL) 3207e037c12SKristof Provost return; 32131b1bfe1SHajimu UMEMOTO 32231b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, ND_IFINFO(ifp)); 32331b1bfe1SHajimu UMEMOTO } 32431b1bfe1SHajimu UMEMOTO 32531b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */ 32631b1bfe1SHajimu UMEMOTO void 3271272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi) 32831b1bfe1SHajimu UMEMOTO { 32931b3783cSHajimu UMEMOTO u_int32_t omaxmtu; 33031b1bfe1SHajimu UMEMOTO 33131b3783cSHajimu UMEMOTO omaxmtu = ndi->maxmtu; 33282cd038dSYoshinobu Inoue 33382cd038dSYoshinobu Inoue switch (ifp->if_type) { 33431b3783cSHajimu UMEMOTO case IFT_ARCNET: 33531b3783cSHajimu UMEMOTO ndi->maxmtu = MIN(ARC_PHDS_MAXMTU, ifp->if_mtu); /* RFC2497 */ 33682cd038dSYoshinobu Inoue break; 33782cd038dSYoshinobu Inoue case IFT_FDDI: 33831b3783cSHajimu UMEMOTO ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu); /* RFC2467 */ 33982cd038dSYoshinobu Inoue break; 3402049fdeeSMatthew N. Dodd case IFT_ISO88025: 3412049fdeeSMatthew N. Dodd ndi->maxmtu = MIN(ISO88025_MAX_MTU, ifp->if_mtu); 3422049fdeeSMatthew N. Dodd break; 34382cd038dSYoshinobu Inoue default: 34482cd038dSYoshinobu Inoue ndi->maxmtu = ifp->if_mtu; 34582cd038dSYoshinobu Inoue break; 34682cd038dSYoshinobu Inoue } 34782cd038dSYoshinobu Inoue 34882cd038dSYoshinobu Inoue /* 34931b3783cSHajimu UMEMOTO * Decreasing the interface MTU under IPV6 minimum MTU may cause 35031b3783cSHajimu UMEMOTO * undesirable situation. We thus notify the operator of the change 35131b3783cSHajimu UMEMOTO * explicitly. The check for omaxmtu is necessary to restrict the 35231b3783cSHajimu UMEMOTO * log to the case of changing the MTU, not initializing it. 35382cd038dSYoshinobu Inoue */ 35431b3783cSHajimu UMEMOTO if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) { 35531b3783cSHajimu UMEMOTO log(LOG_NOTICE, "nd6_setmtu0: " 35631b3783cSHajimu UMEMOTO "new link MTU on %s (%lu) is too small for IPv6\n", 35731b3783cSHajimu UMEMOTO if_name(ifp), (unsigned long)ndi->maxmtu); 35882cd038dSYoshinobu Inoue } 35931b3783cSHajimu UMEMOTO 360603724d3SBjoern A. Zeeb if (ndi->maxmtu > V_in6_maxmtu) 36131b3783cSHajimu UMEMOTO in6_setmaxmtu(); /* check all interfaces just in case */ 36231b3783cSHajimu UMEMOTO 36382cd038dSYoshinobu Inoue } 36482cd038dSYoshinobu Inoue 36582cd038dSYoshinobu Inoue void 3661272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts) 36782cd038dSYoshinobu Inoue { 36807eb2995SHajimu UMEMOTO 36982cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 37082cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 37182cd038dSYoshinobu Inoue ndopts->nd_opts_last 37282cd038dSYoshinobu Inoue = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 37382cd038dSYoshinobu Inoue 37482cd038dSYoshinobu Inoue if (icmp6len == 0) { 37582cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 37682cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 37782cd038dSYoshinobu Inoue } 37882cd038dSYoshinobu Inoue } 37982cd038dSYoshinobu Inoue 38082cd038dSYoshinobu Inoue /* 38182cd038dSYoshinobu Inoue * Take one ND option. 38282cd038dSYoshinobu Inoue */ 38382cd038dSYoshinobu Inoue struct nd_opt_hdr * 3841272577eSXin LI nd6_option(union nd_opts *ndopts) 38582cd038dSYoshinobu Inoue { 38682cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 38782cd038dSYoshinobu Inoue int olen; 38882cd038dSYoshinobu Inoue 38939e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 39039e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 39139e19560SBjoern A. Zeeb __func__)); 3922ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 39382cd038dSYoshinobu Inoue return NULL; 39482cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 39582cd038dSYoshinobu Inoue return NULL; 39682cd038dSYoshinobu Inoue 39782cd038dSYoshinobu Inoue nd_opt = ndopts->nd_opts_search; 39882cd038dSYoshinobu Inoue 39919391949SKris Kennaway /* make sure nd_opt_len is inside the buffer */ 40019391949SKris Kennaway if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) { 40119391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 40219391949SKris Kennaway return NULL; 40319391949SKris Kennaway } 40419391949SKris Kennaway 40582cd038dSYoshinobu Inoue olen = nd_opt->nd_opt_len << 3; 40682cd038dSYoshinobu Inoue if (olen == 0) { 40782cd038dSYoshinobu Inoue /* 40882cd038dSYoshinobu Inoue * Message validation requires that all included 40982cd038dSYoshinobu Inoue * options have a length that is greater than zero. 41082cd038dSYoshinobu Inoue */ 41182cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 41282cd038dSYoshinobu Inoue return NULL; 41382cd038dSYoshinobu Inoue } 41482cd038dSYoshinobu Inoue 41582cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 41619391949SKris Kennaway if (ndopts->nd_opts_search > ndopts->nd_opts_last) { 41719391949SKris Kennaway /* option overruns the end of buffer, invalid */ 41819391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 41919391949SKris Kennaway return NULL; 42019391949SKris Kennaway } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) { 42119391949SKris Kennaway /* reached the end of options chain */ 42282cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 42382cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 42482cd038dSYoshinobu Inoue } 42582cd038dSYoshinobu Inoue return nd_opt; 42682cd038dSYoshinobu Inoue } 42782cd038dSYoshinobu Inoue 42882cd038dSYoshinobu Inoue /* 42982cd038dSYoshinobu Inoue * Parse multiple ND options. 43082cd038dSYoshinobu Inoue * This function is much easier to use, for ND routines that do not need 43182cd038dSYoshinobu Inoue * multiple options of the same type. 43282cd038dSYoshinobu Inoue */ 43382cd038dSYoshinobu Inoue int 4341272577eSXin LI nd6_options(union nd_opts *ndopts) 43582cd038dSYoshinobu Inoue { 43682cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 43782cd038dSYoshinobu Inoue int i = 0; 43882cd038dSYoshinobu Inoue 43939e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 44039e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 44139e19560SBjoern A. Zeeb __func__)); 4422ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 44382cd038dSYoshinobu Inoue return 0; 44482cd038dSYoshinobu Inoue 44582cd038dSYoshinobu Inoue while (1) { 44682cd038dSYoshinobu Inoue nd_opt = nd6_option(ndopts); 4472ce62dceSSUZUKI Shinsuke if (nd_opt == NULL && ndopts->nd_opts_last == NULL) { 44882cd038dSYoshinobu Inoue /* 44982cd038dSYoshinobu Inoue * Message validation requires that all included 45082cd038dSYoshinobu Inoue * options have a length that is greater than zero. 45182cd038dSYoshinobu Inoue */ 452e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_badopt); 45382cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 45482cd038dSYoshinobu Inoue return -1; 45582cd038dSYoshinobu Inoue } 45682cd038dSYoshinobu Inoue 4572ce62dceSSUZUKI Shinsuke if (nd_opt == NULL) 45882cd038dSYoshinobu Inoue goto skip1; 45982cd038dSYoshinobu Inoue 46082cd038dSYoshinobu Inoue switch (nd_opt->nd_opt_type) { 46182cd038dSYoshinobu Inoue case ND_OPT_SOURCE_LINKADDR: 46282cd038dSYoshinobu Inoue case ND_OPT_TARGET_LINKADDR: 46382cd038dSYoshinobu Inoue case ND_OPT_MTU: 46482cd038dSYoshinobu Inoue case ND_OPT_REDIRECTED_HEADER: 46511d8451dSHiroki Sato case ND_OPT_NONCE: 46682cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 46733841545SHajimu UMEMOTO nd6log((LOG_INFO, 46833841545SHajimu UMEMOTO "duplicated ND6 option found (type=%d)\n", 46933841545SHajimu UMEMOTO nd_opt->nd_opt_type)); 47082cd038dSYoshinobu Inoue /* XXX bark? */ 47182cd038dSYoshinobu Inoue } else { 47282cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 47382cd038dSYoshinobu Inoue = nd_opt; 47482cd038dSYoshinobu Inoue } 47582cd038dSYoshinobu Inoue break; 47682cd038dSYoshinobu Inoue case ND_OPT_PREFIX_INFORMATION: 47782cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 47882cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 47982cd038dSYoshinobu Inoue = nd_opt; 48082cd038dSYoshinobu Inoue } 48182cd038dSYoshinobu Inoue ndopts->nd_opts_pi_end = 48282cd038dSYoshinobu Inoue (struct nd_opt_prefix_info *)nd_opt; 48382cd038dSYoshinobu Inoue break; 484abbe8356SBjoern A. Zeeb /* What about ND_OPT_ROUTE_INFO? RFC 4191 */ 485abbe8356SBjoern A. Zeeb case ND_OPT_RDNSS: /* RFC 6106 */ 486abbe8356SBjoern A. Zeeb case ND_OPT_DNSSL: /* RFC 6106 */ 487abbe8356SBjoern A. Zeeb /* 488abbe8356SBjoern A. Zeeb * Silently ignore options we know and do not care about 489abbe8356SBjoern A. Zeeb * in the kernel. 490abbe8356SBjoern A. Zeeb */ 491abbe8356SBjoern A. Zeeb break; 49282cd038dSYoshinobu Inoue default: 49382cd038dSYoshinobu Inoue /* 49482cd038dSYoshinobu Inoue * Unknown options must be silently ignored, 495a4641f4eSPedro F. Giffuni * to accommodate future extension to the protocol. 49682cd038dSYoshinobu Inoue */ 49733841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 49882cd038dSYoshinobu Inoue "nd6_options: unsupported option %d - " 49933841545SHajimu UMEMOTO "option ignored\n", nd_opt->nd_opt_type)); 50082cd038dSYoshinobu Inoue } 50182cd038dSYoshinobu Inoue 50282cd038dSYoshinobu Inoue skip1: 50382cd038dSYoshinobu Inoue i++; 504603724d3SBjoern A. Zeeb if (i > V_nd6_maxndopt) { 505e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_toomanyopt); 50633841545SHajimu UMEMOTO nd6log((LOG_INFO, "too many loop in nd opt\n")); 50782cd038dSYoshinobu Inoue break; 50882cd038dSYoshinobu Inoue } 50982cd038dSYoshinobu Inoue 51082cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 51182cd038dSYoshinobu Inoue break; 51282cd038dSYoshinobu Inoue } 51382cd038dSYoshinobu Inoue 51482cd038dSYoshinobu Inoue return 0; 51582cd038dSYoshinobu Inoue } 51682cd038dSYoshinobu Inoue 51782cd038dSYoshinobu Inoue /* 518743eee66SSUZUKI Shinsuke * ND6 timer routine to handle ND6 entries 51982cd038dSYoshinobu Inoue */ 5209b420b3dSAlexander V. Chernikov static void 5216e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick) 522743eee66SSUZUKI Shinsuke { 523ef8d671cSHajimu UMEMOTO int canceled; 524ef8d671cSHajimu UMEMOTO 525e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 526e6950476SBjoern A. Zeeb 527743eee66SSUZUKI Shinsuke if (tick < 0) { 5286e6b3f7cSQing Li ln->la_expire = 0; 529743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 5300447c136SAlexander V. Chernikov canceled = callout_stop(&ln->lle_timer); 531743eee66SSUZUKI Shinsuke } else { 5327d26db17SHiroki Sato ln->la_expire = time_uptime + tick / hz; 5336e6b3f7cSQing Li LLE_ADDREF(ln); 534743eee66SSUZUKI Shinsuke if (tick > INT_MAX) { 535743eee66SSUZUKI Shinsuke ln->ln_ntick = tick - INT_MAX; 5360447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, INT_MAX, 537743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 538743eee66SSUZUKI Shinsuke } else { 539743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 5400447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, tick, 541743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 542743eee66SSUZUKI Shinsuke } 543743eee66SSUZUKI Shinsuke } 5447c4676ddSRandall Stewart if (canceled > 0) 545ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 546743eee66SSUZUKI Shinsuke } 54782cd038dSYoshinobu Inoue 54826deb882SAlexander V. Chernikov /* 54926deb882SAlexander V. Chernikov * Gets source address of the first packet in hold queue 55026deb882SAlexander V. Chernikov * and stores it in @src. 55126deb882SAlexander V. Chernikov * Returns pointer to @src (if hold queue is not empty) or NULL. 55226deb882SAlexander V. Chernikov * 553c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 55426deb882SAlexander V. Chernikov */ 555c0b8aeaeSAlexander V. Chernikov static __noinline struct in6_addr * 55626deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src) 55726deb882SAlexander V. Chernikov { 55826deb882SAlexander V. Chernikov struct ip6_hdr hdr; 55926deb882SAlexander V. Chernikov struct mbuf *m; 56026deb882SAlexander V. Chernikov 56126deb882SAlexander V. Chernikov if (ln->la_hold == NULL) 56226deb882SAlexander V. Chernikov return (NULL); 56326deb882SAlexander V. Chernikov 56426deb882SAlexander V. Chernikov /* 56526deb882SAlexander V. Chernikov * assume every packet in la_hold has the same IP header 56626deb882SAlexander V. Chernikov */ 56726deb882SAlexander V. Chernikov m = ln->la_hold; 56806a60e4bSAlexander V. Chernikov if (sizeof(hdr) > m->m_len) 56926deb882SAlexander V. Chernikov return (NULL); 57026deb882SAlexander V. Chernikov 57126deb882SAlexander V. Chernikov m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr); 57226deb882SAlexander V. Chernikov *src = hdr.ip6_src; 57326deb882SAlexander V. Chernikov 57426deb882SAlexander V. Chernikov return (src); 57526deb882SAlexander V. Chernikov } 57626deb882SAlexander V. Chernikov 577aa5f023eSAlexander V. Chernikov /* 57812cb7521SAlexander V. Chernikov * Checks if we need to switch from STALE state. 57912cb7521SAlexander V. Chernikov * 58012cb7521SAlexander V. Chernikov * RFC 4861 requires switching from STALE to DELAY state 58112cb7521SAlexander V. Chernikov * on first packet matching entry, waiting V_nd6_delay and 58212cb7521SAlexander V. Chernikov * transition to PROBE state (if upper layer confirmation was 58312cb7521SAlexander V. Chernikov * not received). 58412cb7521SAlexander V. Chernikov * 58512cb7521SAlexander V. Chernikov * This code performs a bit differently: 58612cb7521SAlexander V. Chernikov * On packet hit we don't change state (but desired state 58712cb7521SAlexander V. Chernikov * can be guessed by control plane). However, after V_nd6_delay 58812cb7521SAlexander V. Chernikov * seconds code will transition to PROBE state (so DELAY state 58912cb7521SAlexander V. Chernikov * is kinda skipped in most situations). 59012cb7521SAlexander V. Chernikov * 59112cb7521SAlexander V. Chernikov * Typically, V_nd6_gctimer is bigger than V_nd6_delay, so 59212cb7521SAlexander V. Chernikov * we perform the following upon entering STALE state: 59312cb7521SAlexander V. Chernikov * 59412cb7521SAlexander V. Chernikov * 1) Arm timer to run each V_nd6_delay seconds to make sure that 59512cb7521SAlexander V. Chernikov * if packet was transmitted at the start of given interval, we 59612cb7521SAlexander V. Chernikov * would be able to switch to PROBE state in V_nd6_delay seconds 59712cb7521SAlexander V. Chernikov * as user expects. 59812cb7521SAlexander V. Chernikov * 59912cb7521SAlexander V. Chernikov * 2) Reschedule timer until original V_nd6_gctimer expires keeping 60012cb7521SAlexander V. Chernikov * lle in STALE state (remaining timer value stored in lle_remtime). 60112cb7521SAlexander V. Chernikov * 60212cb7521SAlexander V. Chernikov * 3) Reschedule timer if packet was transmitted less that V_nd6_delay 60312cb7521SAlexander V. Chernikov * seconds ago. 60412cb7521SAlexander V. Chernikov * 60512cb7521SAlexander V. Chernikov * Returns non-zero value if the entry is still STALE (storing 60612cb7521SAlexander V. Chernikov * the next timer interval in @pdelay). 60712cb7521SAlexander V. Chernikov * 60812cb7521SAlexander V. Chernikov * Returns zero value if original timer expired or we need to switch to 60912cb7521SAlexander V. Chernikov * PROBE (store that in @do_switch variable). 61012cb7521SAlexander V. Chernikov */ 61112cb7521SAlexander V. Chernikov static int 61212cb7521SAlexander V. Chernikov nd6_is_stale(struct llentry *lle, long *pdelay, int *do_switch) 61312cb7521SAlexander V. Chernikov { 61412cb7521SAlexander V. Chernikov int nd_delay, nd_gctimer, r_skip_req; 61512cb7521SAlexander V. Chernikov time_t lle_hittime; 61612cb7521SAlexander V. Chernikov long delay; 61712cb7521SAlexander V. Chernikov 61812cb7521SAlexander V. Chernikov *do_switch = 0; 61912cb7521SAlexander V. Chernikov nd_gctimer = V_nd6_gctimer; 62012cb7521SAlexander V. Chernikov nd_delay = V_nd6_delay; 62112cb7521SAlexander V. Chernikov 62212cb7521SAlexander V. Chernikov LLE_REQ_LOCK(lle); 62312cb7521SAlexander V. Chernikov r_skip_req = lle->r_skip_req; 62412cb7521SAlexander V. Chernikov lle_hittime = lle->lle_hittime; 62512cb7521SAlexander V. Chernikov LLE_REQ_UNLOCK(lle); 62612cb7521SAlexander V. Chernikov 62712cb7521SAlexander V. Chernikov if (r_skip_req > 0) { 62812cb7521SAlexander V. Chernikov 62912cb7521SAlexander V. Chernikov /* 63012cb7521SAlexander V. Chernikov * Nonzero r_skip_req value was set upon entering 63112cb7521SAlexander V. Chernikov * STALE state. Since value was not changed, no 63212cb7521SAlexander V. Chernikov * packets were passed using this lle. Ask for 63312cb7521SAlexander V. Chernikov * timer reschedule and keep STALE state. 63412cb7521SAlexander V. Chernikov */ 63512cb7521SAlexander V. Chernikov delay = (long)(MIN(nd_gctimer, nd_delay)); 63612cb7521SAlexander V. Chernikov delay *= hz; 63712cb7521SAlexander V. Chernikov if (lle->lle_remtime > delay) 63812cb7521SAlexander V. Chernikov lle->lle_remtime -= delay; 63912cb7521SAlexander V. Chernikov else { 64012cb7521SAlexander V. Chernikov delay = lle->lle_remtime; 64112cb7521SAlexander V. Chernikov lle->lle_remtime = 0; 64212cb7521SAlexander V. Chernikov } 64312cb7521SAlexander V. Chernikov 64412cb7521SAlexander V. Chernikov if (delay == 0) { 64512cb7521SAlexander V. Chernikov 64612cb7521SAlexander V. Chernikov /* 64712cb7521SAlexander V. Chernikov * The original ng6_gctime timeout ended, 64812cb7521SAlexander V. Chernikov * no more rescheduling. 64912cb7521SAlexander V. Chernikov */ 65012cb7521SAlexander V. Chernikov return (0); 65112cb7521SAlexander V. Chernikov } 65212cb7521SAlexander V. Chernikov 65312cb7521SAlexander V. Chernikov *pdelay = delay; 65412cb7521SAlexander V. Chernikov return (1); 65512cb7521SAlexander V. Chernikov } 65612cb7521SAlexander V. Chernikov 65712cb7521SAlexander V. Chernikov /* 65812cb7521SAlexander V. Chernikov * Packet received. Verify timestamp 65912cb7521SAlexander V. Chernikov */ 66012cb7521SAlexander V. Chernikov delay = (long)(time_uptime - lle_hittime); 66112cb7521SAlexander V. Chernikov if (delay < nd_delay) { 66212cb7521SAlexander V. Chernikov 66312cb7521SAlexander V. Chernikov /* 66412cb7521SAlexander V. Chernikov * V_nd6_delay still not passed since the first 66512cb7521SAlexander V. Chernikov * hit in STALE state. 66612cb7521SAlexander V. Chernikov * Reshedule timer and return. 66712cb7521SAlexander V. Chernikov */ 66812cb7521SAlexander V. Chernikov *pdelay = (long)(nd_delay - delay) * hz; 66912cb7521SAlexander V. Chernikov return (1); 67012cb7521SAlexander V. Chernikov } 67112cb7521SAlexander V. Chernikov 67212cb7521SAlexander V. Chernikov /* Request switching to probe */ 67312cb7521SAlexander V. Chernikov *do_switch = 1; 67412cb7521SAlexander V. Chernikov return (0); 67512cb7521SAlexander V. Chernikov } 67612cb7521SAlexander V. Chernikov 67712cb7521SAlexander V. Chernikov 67812cb7521SAlexander V. Chernikov /* 679aa5f023eSAlexander V. Chernikov * Switch @lle state to new state optionally arming timers. 680c0b8aeaeSAlexander V. Chernikov * 681c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 682aa5f023eSAlexander V. Chernikov */ 683c0b8aeaeSAlexander V. Chernikov __noinline void 684aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(struct llentry *lle, int newstate) 685aa5f023eSAlexander V. Chernikov { 686aa5f023eSAlexander V. Chernikov struct ifnet *ifp; 68712cb7521SAlexander V. Chernikov int nd_gctimer, nd_delay; 68812cb7521SAlexander V. Chernikov long delay, remtime; 689aa5f023eSAlexander V. Chernikov 690aa5f023eSAlexander V. Chernikov delay = 0; 69112cb7521SAlexander V. Chernikov remtime = 0; 692aa5f023eSAlexander V. Chernikov 693aa5f023eSAlexander V. Chernikov switch (newstate) { 694aa5f023eSAlexander V. Chernikov case ND6_LLINFO_INCOMPLETE: 695aa5f023eSAlexander V. Chernikov ifp = lle->lle_tbl->llt_ifp; 696aa5f023eSAlexander V. Chernikov delay = (long)ND_IFINFO(ifp)->retrans * hz / 1000; 697aa5f023eSAlexander V. Chernikov break; 698aa5f023eSAlexander V. Chernikov case ND6_LLINFO_REACHABLE: 699aa5f023eSAlexander V. Chernikov if (!ND6_LLINFO_PERMANENT(lle)) { 700aa5f023eSAlexander V. Chernikov ifp = lle->lle_tbl->llt_ifp; 701aa5f023eSAlexander V. Chernikov delay = (long)ND_IFINFO(ifp)->reachable * hz; 702aa5f023eSAlexander V. Chernikov } 703aa5f023eSAlexander V. Chernikov break; 704aa5f023eSAlexander V. Chernikov case ND6_LLINFO_STALE: 70512cb7521SAlexander V. Chernikov 70612cb7521SAlexander V. Chernikov /* 70712cb7521SAlexander V. Chernikov * Notify fast path that we want to know if any packet 70812cb7521SAlexander V. Chernikov * is transmitted by setting r_skip_req. 70912cb7521SAlexander V. Chernikov */ 71012cb7521SAlexander V. Chernikov LLE_REQ_LOCK(lle); 71112cb7521SAlexander V. Chernikov lle->r_skip_req = 1; 71212cb7521SAlexander V. Chernikov LLE_REQ_UNLOCK(lle); 71312cb7521SAlexander V. Chernikov nd_delay = V_nd6_delay; 71412cb7521SAlexander V. Chernikov nd_gctimer = V_nd6_gctimer; 71512cb7521SAlexander V. Chernikov 71612cb7521SAlexander V. Chernikov delay = (long)(MIN(nd_gctimer, nd_delay)) * hz; 71712cb7521SAlexander V. Chernikov remtime = (long)nd_gctimer * hz - delay; 718aa5f023eSAlexander V. Chernikov break; 719aa5f023eSAlexander V. Chernikov case ND6_LLINFO_DELAY: 720aa5f023eSAlexander V. Chernikov lle->la_asked = 0; 721aa5f023eSAlexander V. Chernikov delay = (long)V_nd6_delay * hz; 722aa5f023eSAlexander V. Chernikov break; 723aa5f023eSAlexander V. Chernikov } 724aa5f023eSAlexander V. Chernikov 725aa5f023eSAlexander V. Chernikov if (delay > 0) 726aa5f023eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, delay); 727aa5f023eSAlexander V. Chernikov 72812cb7521SAlexander V. Chernikov lle->lle_remtime = remtime; 729aa5f023eSAlexander V. Chernikov lle->ln_state = newstate; 730aa5f023eSAlexander V. Chernikov } 731aa5f023eSAlexander V. Chernikov 732c0b8aeaeSAlexander V. Chernikov /* 733c0b8aeaeSAlexander V. Chernikov * Timer-dependent part of nd state machine. 734c0b8aeaeSAlexander V. Chernikov * 735c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 736c0b8aeaeSAlexander V. Chernikov */ 737c0b8aeaeSAlexander V. Chernikov static __noinline void 7381272577eSXin LI nd6_llinfo_timer(void *arg) 739743eee66SSUZUKI Shinsuke { 7406e6b3f7cSQing Li struct llentry *ln; 74126deb882SAlexander V. Chernikov struct in6_addr *dst, *pdst, *psrc, src; 742743eee66SSUZUKI Shinsuke struct ifnet *ifp; 743435bece4SMark Johnston struct nd_ifinfo *ndi; 74412cb7521SAlexander V. Chernikov int do_switch, send_ns; 74512cb7521SAlexander V. Chernikov long delay; 74682cd038dSYoshinobu Inoue 74719291ab3SBjoern A. Zeeb KASSERT(arg != NULL, ("%s: arg NULL", __func__)); 7486e6b3f7cSQing Li ln = (struct llentry *)arg; 749435bece4SMark Johnston ifp = lltable_get_ifp(ln->lle_tbl); 750435bece4SMark Johnston CURVNET_SET(ifp->if_vnet); 751435bece4SMark Johnston 752435bece4SMark Johnston ND6_RLOCK(); 7532575fbb8SRandall Stewart LLE_WLOCK(ln); 7540447c136SAlexander V. Chernikov if (callout_pending(&ln->lle_timer)) { 7552575fbb8SRandall Stewart /* 7562575fbb8SRandall Stewart * Here we are a bit odd here in the treatment of 7572575fbb8SRandall Stewart * active/pending. If the pending bit is set, it got 7582575fbb8SRandall Stewart * rescheduled before I ran. The active 7592575fbb8SRandall Stewart * bit we ignore, since if it was stopped 7602575fbb8SRandall Stewart * in ll_tablefree() and was currently running 7612575fbb8SRandall Stewart * it would have return 0 so the code would 7622575fbb8SRandall Stewart * not have deleted it since the callout could 7632575fbb8SRandall Stewart * not be stopped so we want to go through 7642575fbb8SRandall Stewart * with the delete here now. If the callout 7652575fbb8SRandall Stewart * was restarted, the pending bit will be back on and 7662575fbb8SRandall Stewart * we just want to bail since the callout_reset would 7672575fbb8SRandall Stewart * return 1 and our reference would have been removed 7682575fbb8SRandall Stewart * by nd6_llinfo_settimer_locked above since canceled 7692575fbb8SRandall Stewart * would have been 1. 7702575fbb8SRandall Stewart */ 7712575fbb8SRandall Stewart LLE_WUNLOCK(ln); 772435bece4SMark Johnston ND6_RUNLOCK(); 773435bece4SMark Johnston CURVNET_RESTORE(); 7742575fbb8SRandall Stewart return; 7752575fbb8SRandall Stewart } 77626deb882SAlexander V. Chernikov ndi = ND_IFINFO(ifp); 77726deb882SAlexander V. Chernikov send_ns = 0; 77826deb882SAlexander V. Chernikov dst = &ln->r_l3addr.addr6; 77926deb882SAlexander V. Chernikov pdst = dst; 78082cd038dSYoshinobu Inoue 781743eee66SSUZUKI Shinsuke if (ln->ln_ntick > 0) { 782743eee66SSUZUKI Shinsuke if (ln->ln_ntick > INT_MAX) { 783743eee66SSUZUKI Shinsuke ln->ln_ntick -= INT_MAX; 784e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, INT_MAX); 785743eee66SSUZUKI Shinsuke } else { 786743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 787e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, ln->ln_ntick); 78882cd038dSYoshinobu Inoue } 7896e6b3f7cSQing Li goto done; 790743eee66SSUZUKI Shinsuke } 791743eee66SSUZUKI Shinsuke 792287e3cb4SHajimu UMEMOTO if (ln->la_flags & LLE_STATIC) { 7936e6b3f7cSQing Li goto done; 7946e6b3f7cSQing Li } 79582cd038dSYoshinobu Inoue 7966e6b3f7cSQing Li if (ln->la_flags & LLE_DELETED) { 797435bece4SMark Johnston nd6_free(&ln, 0); 7986e6b3f7cSQing Li goto done; 7996e6b3f7cSQing Li } 80082cd038dSYoshinobu Inoue 80182cd038dSYoshinobu Inoue switch (ln->ln_state) { 80282cd038dSYoshinobu Inoue case ND6_LLINFO_INCOMPLETE: 8036e6b3f7cSQing Li if (ln->la_asked < V_nd6_mmaxtries) { 8046e6b3f7cSQing Li ln->la_asked++; 80526deb882SAlexander V. Chernikov send_ns = 1; 80626deb882SAlexander V. Chernikov /* Send NS to multicast address */ 80726deb882SAlexander V. Chernikov pdst = NULL; 80882cd038dSYoshinobu Inoue } else { 8096e6b3f7cSQing Li struct mbuf *m = ln->la_hold; 81082cd038dSYoshinobu Inoue if (m) { 81131d4137bSSUZUKI Shinsuke struct mbuf *m0; 81231d4137bSSUZUKI Shinsuke 81382cd038dSYoshinobu Inoue /* 8146e6b3f7cSQing Li * assuming every packet in la_hold has the 815e6950476SBjoern A. Zeeb * same IP header. Send error after unlock. 81682cd038dSYoshinobu Inoue */ 81731d4137bSSUZUKI Shinsuke m0 = m->m_nextpkt; 81831d4137bSSUZUKI Shinsuke m->m_nextpkt = NULL; 8196e6b3f7cSQing Li ln->la_hold = m0; 82031d4137bSSUZUKI Shinsuke clear_llinfo_pqueue(ln); 82182cd038dSYoshinobu Inoue } 822435bece4SMark Johnston nd6_free(&ln, 0); 823e6950476SBjoern A. Zeeb if (m != NULL) 824e6950476SBjoern A. Zeeb icmp6_error2(m, ICMP6_DST_UNREACH, 825e6950476SBjoern A. Zeeb ICMP6_DST_UNREACH_ADDR, 0, ifp); 82682cd038dSYoshinobu Inoue } 82782cd038dSYoshinobu Inoue break; 82882cd038dSYoshinobu Inoue case ND6_LLINFO_REACHABLE: 829aa5f023eSAlexander V. Chernikov if (!ND6_LLINFO_PERMANENT(ln)) 830aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); 83182cd038dSYoshinobu Inoue break; 83233841545SHajimu UMEMOTO 83333841545SHajimu UMEMOTO case ND6_LLINFO_STALE: 83412cb7521SAlexander V. Chernikov if (nd6_is_stale(ln, &delay, &do_switch) != 0) { 83512cb7521SAlexander V. Chernikov 83612cb7521SAlexander V. Chernikov /* 83712cb7521SAlexander V. Chernikov * No packet has used this entry and GC timeout 83812cb7521SAlexander V. Chernikov * has not been passed. Reshedule timer and 83912cb7521SAlexander V. Chernikov * return. 84012cb7521SAlexander V. Chernikov */ 84112cb7521SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, delay); 84212cb7521SAlexander V. Chernikov break; 84312cb7521SAlexander V. Chernikov } 84412cb7521SAlexander V. Chernikov 84512cb7521SAlexander V. Chernikov if (do_switch == 0) { 84612cb7521SAlexander V. Chernikov 84712cb7521SAlexander V. Chernikov /* 84812cb7521SAlexander V. Chernikov * GC timer has ended and entry hasn't been used. 84912cb7521SAlexander V. Chernikov * Run Garbage collector (RFC 4861, 5.3) 85012cb7521SAlexander V. Chernikov */ 851435bece4SMark Johnston if (!ND6_LLINFO_PERMANENT(ln)) 852435bece4SMark Johnston nd6_free(&ln, 1); 85333841545SHajimu UMEMOTO break; 85412cb7521SAlexander V. Chernikov } 85512cb7521SAlexander V. Chernikov 85612cb7521SAlexander V. Chernikov /* Entry has been used AND delay timer has ended. */ 85712cb7521SAlexander V. Chernikov 85812cb7521SAlexander V. Chernikov /* FALLTHROUGH */ 85933841545SHajimu UMEMOTO 86082cd038dSYoshinobu Inoue case ND6_LLINFO_DELAY: 861686cdd19SJun-ichiro itojun Hagino if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) { 862686cdd19SJun-ichiro itojun Hagino /* We need NUD */ 8636e6b3f7cSQing Li ln->la_asked = 1; 864aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_PROBE); 86526deb882SAlexander V. Chernikov send_ns = 1; 866aa5f023eSAlexander V. Chernikov } else 867aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); /* XXX */ 86882cd038dSYoshinobu Inoue break; 86982cd038dSYoshinobu Inoue case ND6_LLINFO_PROBE: 8706e6b3f7cSQing Li if (ln->la_asked < V_nd6_umaxtries) { 8716e6b3f7cSQing Li ln->la_asked++; 87226deb882SAlexander V. Chernikov send_ns = 1; 87382cd038dSYoshinobu Inoue } else { 874435bece4SMark Johnston nd6_free(&ln, 0); 87582cd038dSYoshinobu Inoue } 87682cd038dSYoshinobu Inoue break; 877e6950476SBjoern A. Zeeb default: 878e6950476SBjoern A. Zeeb panic("%s: paths in a dark night can be confusing: %d", 879e6950476SBjoern A. Zeeb __func__, ln->ln_state); 88082cd038dSYoshinobu Inoue } 8816e6b3f7cSQing Li done: 882435bece4SMark Johnston if (ln != NULL) 883435bece4SMark Johnston ND6_RUNLOCK(); 88426deb882SAlexander V. Chernikov if (send_ns != 0) { 88526deb882SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000); 88626deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(ln, &src); 88726deb882SAlexander V. Chernikov LLE_FREE_LOCKED(ln); 88826deb882SAlexander V. Chernikov ln = NULL; 88926deb882SAlexander V. Chernikov nd6_ns_output(ifp, psrc, pdst, dst, NULL); 89026deb882SAlexander V. Chernikov } 89126deb882SAlexander V. Chernikov 8926e6b3f7cSQing Li if (ln != NULL) 893e6950476SBjoern A. Zeeb LLE_FREE_LOCKED(ln); 894f0c0b143SHajimu UMEMOTO CURVNET_RESTORE(); 89582cd038dSYoshinobu Inoue } 89682cd038dSYoshinobu Inoue 897743eee66SSUZUKI Shinsuke 898743eee66SSUZUKI Shinsuke /* 899743eee66SSUZUKI Shinsuke * ND6 timer routine to expire default route list and prefix list 900743eee66SSUZUKI Shinsuke */ 901743eee66SSUZUKI Shinsuke void 9028b615593SMarko Zec nd6_timer(void *arg) 903743eee66SSUZUKI Shinsuke { 90421ca7b57SMarko Zec CURVNET_SET((struct vnet *) arg); 9054de485feSMark Johnston struct nd_drhead drq; 9063b0b2840SJohn Baldwin struct nd_defrouter *dr, *ndr; 9073b0b2840SJohn Baldwin struct nd_prefix *pr, *npr; 908743eee66SSUZUKI Shinsuke struct in6_ifaddr *ia6, *nia6; 909743eee66SSUZUKI Shinsuke 9104de485feSMark Johnston TAILQ_INIT(&drq); 9114de485feSMark Johnston 91233841545SHajimu UMEMOTO /* expire default router list */ 9134de485feSMark Johnston ND6_WLOCK(); 9144de485feSMark Johnston TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) 9157d26db17SHiroki Sato if (dr->expire && dr->expire < time_uptime) 9164de485feSMark Johnston defrouter_unlink(dr, &drq); 9174de485feSMark Johnston ND6_WUNLOCK(); 9184de485feSMark Johnston 9194de485feSMark Johnston while ((dr = TAILQ_FIRST(&drq)) != NULL) { 9204de485feSMark Johnston TAILQ_REMOVE(&drq, dr, dr_entry); 9214de485feSMark Johnston defrouter_del(dr); 922686cdd19SJun-ichiro itojun Hagino } 92382cd038dSYoshinobu Inoue 92433841545SHajimu UMEMOTO /* 92533841545SHajimu UMEMOTO * expire interface addresses. 92633841545SHajimu UMEMOTO * in the past the loop was inside prefix expiry processing. 92733841545SHajimu UMEMOTO * However, from a stricter speci-confrmance standpoint, we should 92833841545SHajimu UMEMOTO * rather separate address lifetimes and prefix lifetimes. 929d1da0a06SRobert Watson * 930d1da0a06SRobert Watson * XXXRW: in6_ifaddrhead locking. 93133841545SHajimu UMEMOTO */ 93233841545SHajimu UMEMOTO addrloop: 93380af0152SRobert Watson TAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) { 93482cd038dSYoshinobu Inoue /* check address lifetime */ 93533841545SHajimu UMEMOTO if (IFA6_IS_INVALID(ia6)) { 93633841545SHajimu UMEMOTO int regen = 0; 93733841545SHajimu UMEMOTO 93833841545SHajimu UMEMOTO /* 93933841545SHajimu UMEMOTO * If the expiring address is temporary, try 94033841545SHajimu UMEMOTO * regenerating a new one. This would be useful when 94188ff5695SSUZUKI Shinsuke * we suspended a laptop PC, then turned it on after a 94233841545SHajimu UMEMOTO * period that could invalidate all temporary 94333841545SHajimu UMEMOTO * addresses. Although we may have to restart the 94433841545SHajimu UMEMOTO * loop (see below), it must be after purging the 94533841545SHajimu UMEMOTO * address. Otherwise, we'd see an infinite loop of 94633841545SHajimu UMEMOTO * regeneration. 94733841545SHajimu UMEMOTO */ 948603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 94933841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) { 95033841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) 95133841545SHajimu UMEMOTO regen = 1; 95233841545SHajimu UMEMOTO } 95333841545SHajimu UMEMOTO 95433841545SHajimu UMEMOTO in6_purgeaddr(&ia6->ia_ifa); 95533841545SHajimu UMEMOTO 95633841545SHajimu UMEMOTO if (regen) 95733841545SHajimu UMEMOTO goto addrloop; /* XXX: see below */ 95843068328SHajimu UMEMOTO } else if (IFA6_IS_DEPRECATED(ia6)) { 95933841545SHajimu UMEMOTO int oldflags = ia6->ia6_flags; 96033841545SHajimu UMEMOTO 96182cd038dSYoshinobu Inoue ia6->ia6_flags |= IN6_IFF_DEPRECATED; 96233841545SHajimu UMEMOTO 96333841545SHajimu UMEMOTO /* 96433841545SHajimu UMEMOTO * If a temporary address has just become deprecated, 96533841545SHajimu UMEMOTO * regenerate a new one if possible. 96633841545SHajimu UMEMOTO */ 967603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 96833841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 96933841545SHajimu UMEMOTO (oldflags & IN6_IFF_DEPRECATED) == 0) { 97033841545SHajimu UMEMOTO 97133841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) { 97233841545SHajimu UMEMOTO /* 97333841545SHajimu UMEMOTO * A new temporary address is 97433841545SHajimu UMEMOTO * generated. 97533841545SHajimu UMEMOTO * XXX: this means the address chain 97633841545SHajimu UMEMOTO * has changed while we are still in 97733841545SHajimu UMEMOTO * the loop. Although the change 97833841545SHajimu UMEMOTO * would not cause disaster (because 97988ff5695SSUZUKI Shinsuke * it's not a deletion, but an 98088ff5695SSUZUKI Shinsuke * addition,) we'd rather restart the 98133841545SHajimu UMEMOTO * loop just for safety. Or does this 98233841545SHajimu UMEMOTO * significantly reduce performance?? 98333841545SHajimu UMEMOTO */ 98433841545SHajimu UMEMOTO goto addrloop; 98533841545SHajimu UMEMOTO } 98633841545SHajimu UMEMOTO } 9876401c828SHiroki Sato } else if ((ia6->ia6_flags & IN6_IFF_TENTATIVE) != 0) { 9886401c828SHiroki Sato /* 9896401c828SHiroki Sato * Schedule DAD for a tentative address. This happens 9906401c828SHiroki Sato * if the interface was down or not running 9916401c828SHiroki Sato * when the address was configured. 9926401c828SHiroki Sato */ 9936401c828SHiroki Sato int delay; 9946401c828SHiroki Sato 9956401c828SHiroki Sato delay = arc4random() % 9966401c828SHiroki Sato (MAX_RTR_SOLICITATION_DELAY * hz); 9976401c828SHiroki Sato nd6_dad_start((struct ifaddr *)ia6, delay); 99883649f07SHajimu UMEMOTO } else { 99933841545SHajimu UMEMOTO /* 10006401c828SHiroki Sato * Check status of the interface. If it is down, 10016401c828SHiroki Sato * mark the address as tentative for future DAD. 10026401c828SHiroki Sato */ 10036401c828SHiroki Sato if ((ia6->ia_ifp->if_flags & IFF_UP) == 0 || 10046401c828SHiroki Sato (ia6->ia_ifp->if_drv_flags & IFF_DRV_RUNNING) 10056401c828SHiroki Sato == 0 || 10066401c828SHiroki Sato (ND_IFINFO(ia6->ia_ifp)->flags & 10076401c828SHiroki Sato ND6_IFF_IFDISABLED) != 0) { 10086401c828SHiroki Sato ia6->ia6_flags &= ~IN6_IFF_DUPLICATED; 10096401c828SHiroki Sato ia6->ia6_flags |= IN6_IFF_TENTATIVE; 10106401c828SHiroki Sato } 10116401c828SHiroki Sato /* 101233841545SHajimu UMEMOTO * A new RA might have made a deprecated address 101333841545SHajimu UMEMOTO * preferred. 101433841545SHajimu UMEMOTO */ 101533841545SHajimu UMEMOTO ia6->ia6_flags &= ~IN6_IFF_DEPRECATED; 101682cd038dSYoshinobu Inoue } 101782cd038dSYoshinobu Inoue } 101882cd038dSYoshinobu Inoue 101933841545SHajimu UMEMOTO /* expire prefix list */ 10203b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 102182cd038dSYoshinobu Inoue /* 102282cd038dSYoshinobu Inoue * check prefix lifetime. 102382cd038dSYoshinobu Inoue * since pltime is just for autoconf, pltime processing for 102482cd038dSYoshinobu Inoue * prefix is not necessary. 102582cd038dSYoshinobu Inoue */ 1026743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME && 10277d26db17SHiroki Sato time_uptime - pr->ndpr_lastupdate > pr->ndpr_vltime) { 102882cd038dSYoshinobu Inoue 102982cd038dSYoshinobu Inoue /* 103082cd038dSYoshinobu Inoue * address expiration and prefix expiration are 103133841545SHajimu UMEMOTO * separate. NEVER perform in6_purgeaddr here. 103282cd038dSYoshinobu Inoue */ 103382cd038dSYoshinobu Inoue prelist_remove(pr); 10343b0b2840SJohn Baldwin } 103582cd038dSYoshinobu Inoue } 103699a0c406SBjoern A. Zeeb 103799a0c406SBjoern A. Zeeb callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz, 103899a0c406SBjoern A. Zeeb nd6_timer, curvnet); 103999a0c406SBjoern A. Zeeb 10408b615593SMarko Zec CURVNET_RESTORE(); 104182cd038dSYoshinobu Inoue } 104282cd038dSYoshinobu Inoue 10431272577eSXin LI /* 10441272577eSXin LI * ia6 - deprecated/invalidated temporary address 10451272577eSXin LI */ 104633841545SHajimu UMEMOTO static int 10471272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6) 104833841545SHajimu UMEMOTO { 104933841545SHajimu UMEMOTO struct ifaddr *ifa; 105033841545SHajimu UMEMOTO struct ifnet *ifp; 105133841545SHajimu UMEMOTO struct in6_ifaddr *public_ifa6 = NULL; 105233841545SHajimu UMEMOTO 105333841545SHajimu UMEMOTO ifp = ia6->ia_ifa.ifa_ifp; 1054137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1055c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 105633841545SHajimu UMEMOTO struct in6_ifaddr *it6; 105733841545SHajimu UMEMOTO 105833841545SHajimu UMEMOTO if (ifa->ifa_addr->sa_family != AF_INET6) 105933841545SHajimu UMEMOTO continue; 106033841545SHajimu UMEMOTO 106133841545SHajimu UMEMOTO it6 = (struct in6_ifaddr *)ifa; 106233841545SHajimu UMEMOTO 106333841545SHajimu UMEMOTO /* ignore no autoconf addresses. */ 106433841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0) 106533841545SHajimu UMEMOTO continue; 106633841545SHajimu UMEMOTO 106733841545SHajimu UMEMOTO /* ignore autoconf addresses with different prefixes. */ 106833841545SHajimu UMEMOTO if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr) 106933841545SHajimu UMEMOTO continue; 107033841545SHajimu UMEMOTO 107133841545SHajimu UMEMOTO /* 107233841545SHajimu UMEMOTO * Now we are looking at an autoconf address with the same 107333841545SHajimu UMEMOTO * prefix as ours. If the address is temporary and is still 107433841545SHajimu UMEMOTO * preferred, do not create another one. It would be rare, but 107533841545SHajimu UMEMOTO * could happen, for example, when we resume a laptop PC after 107633841545SHajimu UMEMOTO * a long period. 107733841545SHajimu UMEMOTO */ 107833841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 107933841545SHajimu UMEMOTO !IFA6_IS_DEPRECATED(it6)) { 108033841545SHajimu UMEMOTO public_ifa6 = NULL; 108133841545SHajimu UMEMOTO break; 108233841545SHajimu UMEMOTO } 108333841545SHajimu UMEMOTO 108433841545SHajimu UMEMOTO /* 108533841545SHajimu UMEMOTO * This is a public autoconf address that has the same prefix 108633841545SHajimu UMEMOTO * as ours. If it is preferred, keep it. We can't break the 108733841545SHajimu UMEMOTO * loop here, because there may be a still-preferred temporary 108833841545SHajimu UMEMOTO * address with the prefix. 108933841545SHajimu UMEMOTO */ 109033841545SHajimu UMEMOTO if (!IFA6_IS_DEPRECATED(it6)) 109133841545SHajimu UMEMOTO public_ifa6 = it6; 1092dff78447SMark Johnston } 1093c1752bcdSQing Li if (public_ifa6 != NULL) 1094c1752bcdSQing Li ifa_ref(&public_ifa6->ia_ifa); 1095137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 109633841545SHajimu UMEMOTO 109733841545SHajimu UMEMOTO if (public_ifa6 != NULL) { 109833841545SHajimu UMEMOTO int e; 109933841545SHajimu UMEMOTO 1100743eee66SSUZUKI Shinsuke if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) { 1101c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 110233841545SHajimu UMEMOTO log(LOG_NOTICE, "regen_tmpaddr: failed to create a new" 110333841545SHajimu UMEMOTO " tmp addr,errno=%d\n", e); 110433841545SHajimu UMEMOTO return (-1); 110533841545SHajimu UMEMOTO } 1106c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 110733841545SHajimu UMEMOTO return (0); 110833841545SHajimu UMEMOTO } 110933841545SHajimu UMEMOTO 111033841545SHajimu UMEMOTO return (-1); 111133841545SHajimu UMEMOTO } 111233841545SHajimu UMEMOTO 1113686cdd19SJun-ichiro itojun Hagino /* 1114df890b8eSMark Johnston * Remove prefix and default router list entries corresponding to ifp. Neighbor 1115df890b8eSMark Johnston * cache entries are freed in in6_domifdetach(). 1116686cdd19SJun-ichiro itojun Hagino */ 1117686cdd19SJun-ichiro itojun Hagino void 11181272577eSXin LI nd6_purge(struct ifnet *ifp) 1119686cdd19SJun-ichiro itojun Hagino { 11204de485feSMark Johnston struct nd_drhead drq; 1121743eee66SSUZUKI Shinsuke struct nd_defrouter *dr, *ndr; 1122686cdd19SJun-ichiro itojun Hagino struct nd_prefix *pr, *npr; 1123686cdd19SJun-ichiro itojun Hagino 11244de485feSMark Johnston TAILQ_INIT(&drq); 11254de485feSMark Johnston 1126686cdd19SJun-ichiro itojun Hagino /* 1127743eee66SSUZUKI Shinsuke * Nuke default router list entries toward ifp. 1128743eee66SSUZUKI Shinsuke * We defer removal of default router list entries that is installed 1129743eee66SSUZUKI Shinsuke * in the routing table, in order to keep additional side effects as 1130743eee66SSUZUKI Shinsuke * small as possible. 1131686cdd19SJun-ichiro itojun Hagino */ 11324de485feSMark Johnston ND6_WLOCK(); 11333b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 1134743eee66SSUZUKI Shinsuke if (dr->installed) 1135743eee66SSUZUKI Shinsuke continue; 1136686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 11374de485feSMark Johnston defrouter_unlink(dr, &drq); 1138686cdd19SJun-ichiro itojun Hagino } 1139743eee66SSUZUKI Shinsuke 11403b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 1141743eee66SSUZUKI Shinsuke if (!dr->installed) 1142743eee66SSUZUKI Shinsuke continue; 1143686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 11444de485feSMark Johnston defrouter_unlink(dr, &drq); 11454de485feSMark Johnston } 11464de485feSMark Johnston ND6_WUNLOCK(); 11474de485feSMark Johnston 11484de485feSMark Johnston while ((dr = TAILQ_FIRST(&drq)) != NULL) { 11494de485feSMark Johnston TAILQ_REMOVE(&drq, dr, dr_entry); 11504de485feSMark Johnston defrouter_del(dr); 1151686cdd19SJun-ichiro itojun Hagino } 1152686cdd19SJun-ichiro itojun Hagino 1153686cdd19SJun-ichiro itojun Hagino /* Nuke prefix list entries toward ifp */ 11543b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 1155686cdd19SJun-ichiro itojun Hagino if (pr->ndpr_ifp == ifp) { 115633841545SHajimu UMEMOTO /* 1157743eee66SSUZUKI Shinsuke * Because if_detach() does *not* release prefixes 1158743eee66SSUZUKI Shinsuke * while purging addresses the reference count will 1159743eee66SSUZUKI Shinsuke * still be above zero. We therefore reset it to 1160743eee66SSUZUKI Shinsuke * make sure that the prefix really gets purged. 1161743eee66SSUZUKI Shinsuke */ 1162*0bbf244eSMark Johnston pr->ndpr_addrcnt = 0; 1163743eee66SSUZUKI Shinsuke 1164686cdd19SJun-ichiro itojun Hagino prelist_remove(pr); 1165686cdd19SJun-ichiro itojun Hagino } 1166686cdd19SJun-ichiro itojun Hagino } 1167686cdd19SJun-ichiro itojun Hagino 1168686cdd19SJun-ichiro itojun Hagino /* cancel default outgoing interface setting */ 1169603724d3SBjoern A. Zeeb if (V_nd6_defifindex == ifp->if_index) 1170686cdd19SJun-ichiro itojun Hagino nd6_setdefaultiface(0); 1171686cdd19SJun-ichiro itojun Hagino 1172e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 1173a283298cSHiroki Sato /* Refresh default router list. */ 1174686cdd19SJun-ichiro itojun Hagino defrouter_select(); 11756e6b3f7cSQing Li } 11761026ccc4SHajimu UMEMOTO } 1177686cdd19SJun-ichiro itojun Hagino 1178686cdd19SJun-ichiro itojun Hagino /* 11796e6b3f7cSQing Li * the caller acquires and releases the lock on the lltbls 11806e6b3f7cSQing Li * Returns the llentry locked 1181686cdd19SJun-ichiro itojun Hagino */ 11826e6b3f7cSQing Li struct llentry * 1183f0316e1aSAlexander V. Chernikov nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp) 118482cd038dSYoshinobu Inoue { 118582cd038dSYoshinobu Inoue struct sockaddr_in6 sin6; 11866e6b3f7cSQing Li struct llentry *ln; 118782cd038dSYoshinobu Inoue 118882cd038dSYoshinobu Inoue bzero(&sin6, sizeof(sin6)); 118982cd038dSYoshinobu Inoue sin6.sin6_len = sizeof(struct sockaddr_in6); 119082cd038dSYoshinobu Inoue sin6.sin6_family = AF_INET6; 119182cd038dSYoshinobu Inoue sin6.sin6_addr = *addr6; 1192686cdd19SJun-ichiro itojun Hagino 11936e6b3f7cSQing Li IF_AFDATA_LOCK_ASSERT(ifp); 119482cd038dSYoshinobu Inoue 1195f506d933SAlexander V. Chernikov ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)&sin6); 1196b4b1367aSAlexander V. Chernikov 1197b4b1367aSAlexander V. Chernikov return (ln); 1198b4b1367aSAlexander V. Chernikov } 1199b4b1367aSAlexander V. Chernikov 1200b4b1367aSAlexander V. Chernikov struct llentry * 1201f0316e1aSAlexander V. Chernikov nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp) 1202b4b1367aSAlexander V. Chernikov { 1203b4b1367aSAlexander V. Chernikov struct sockaddr_in6 sin6; 1204b4b1367aSAlexander V. Chernikov struct llentry *ln; 1205b4b1367aSAlexander V. Chernikov 1206b4b1367aSAlexander V. Chernikov bzero(&sin6, sizeof(sin6)); 1207b4b1367aSAlexander V. Chernikov sin6.sin6_len = sizeof(struct sockaddr_in6); 1208b4b1367aSAlexander V. Chernikov sin6.sin6_family = AF_INET6; 1209b4b1367aSAlexander V. Chernikov sin6.sin6_addr = *addr6; 1210b4b1367aSAlexander V. Chernikov 12115a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6); 1212b4b1367aSAlexander V. Chernikov if (ln != NULL) 121382cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_NOSTATE; 12146e6b3f7cSQing Li 12156e6b3f7cSQing Li return (ln); 121682cd038dSYoshinobu Inoue } 121782cd038dSYoshinobu Inoue 121882cd038dSYoshinobu Inoue /* 121977b691e0SBrian Feldman * Test whether a given IPv6 address is a neighbor or not, ignoring 122077b691e0SBrian Feldman * the actual neighbor cache. The neighbor cache is ignored in order 122177b691e0SBrian Feldman * to not reenter the routing code from within itself. 122282cd038dSYoshinobu Inoue */ 122377b691e0SBrian Feldman static int 1224f0316e1aSAlexander V. Chernikov nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp) 122582cd038dSYoshinobu Inoue { 12264208ea14SHajimu UMEMOTO struct nd_prefix *pr; 1227743eee66SSUZUKI Shinsuke struct ifaddr *dstaddr; 12289a1b64d5SAlexander V. Chernikov struct rt_addrinfo info; 12299a1b64d5SAlexander V. Chernikov struct sockaddr_in6 rt_key; 12309a1b64d5SAlexander V. Chernikov struct sockaddr *dst6; 12319a1b64d5SAlexander V. Chernikov int fibnum; 123282cd038dSYoshinobu Inoue 1233686cdd19SJun-ichiro itojun Hagino /* 1234686cdd19SJun-ichiro itojun Hagino * A link-local address is always a neighbor. 12354208ea14SHajimu UMEMOTO * XXX: a link does not necessarily specify a single interface. 1236686cdd19SJun-ichiro itojun Hagino */ 1237a1f7e5f8SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) { 1238a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 sin6_copy; 1239a1f7e5f8SHajimu UMEMOTO u_int32_t zone; 1240a1f7e5f8SHajimu UMEMOTO 1241a1f7e5f8SHajimu UMEMOTO /* 1242a1f7e5f8SHajimu UMEMOTO * We need sin6_copy since sa6_recoverscope() may modify the 1243a1f7e5f8SHajimu UMEMOTO * content (XXX). 1244a1f7e5f8SHajimu UMEMOTO */ 1245a1f7e5f8SHajimu UMEMOTO sin6_copy = *addr; 1246a1f7e5f8SHajimu UMEMOTO if (sa6_recoverscope(&sin6_copy)) 1247a1f7e5f8SHajimu UMEMOTO return (0); /* XXX: should be impossible */ 1248a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone)) 1249a1f7e5f8SHajimu UMEMOTO return (0); 1250a1f7e5f8SHajimu UMEMOTO if (sin6_copy.sin6_scope_id == zone) 125182cd038dSYoshinobu Inoue return (1); 1252a1f7e5f8SHajimu UMEMOTO else 1253a1f7e5f8SHajimu UMEMOTO return (0); 1254a1f7e5f8SHajimu UMEMOTO } 125582cd038dSYoshinobu Inoue 12569a1b64d5SAlexander V. Chernikov bzero(&rt_key, sizeof(rt_key)); 12579a1b64d5SAlexander V. Chernikov bzero(&info, sizeof(info)); 12589a1b64d5SAlexander V. Chernikov info.rti_info[RTAX_DST] = (struct sockaddr *)&rt_key; 12599a1b64d5SAlexander V. Chernikov 12609a1b64d5SAlexander V. Chernikov /* Always use the default FIB here. XXME - why? */ 12619a1b64d5SAlexander V. Chernikov fibnum = RT_DEFAULT_FIB; 12629a1b64d5SAlexander V. Chernikov 126382cd038dSYoshinobu Inoue /* 126482cd038dSYoshinobu Inoue * If the address matches one of our addresses, 126582cd038dSYoshinobu Inoue * it should be a neighbor. 12664208ea14SHajimu UMEMOTO * If the address matches one of our on-link prefixes, it should be a 12674208ea14SHajimu UMEMOTO * neighbor. 126882cd038dSYoshinobu Inoue */ 12693b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 12704208ea14SHajimu UMEMOTO if (pr->ndpr_ifp != ifp) 12714208ea14SHajimu UMEMOTO continue; 127282cd038dSYoshinobu Inoue 1273baf7c373SQing Li if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) { 127481d5d46bSBjoern A. Zeeb 127581d5d46bSBjoern A. Zeeb /* Always use the default FIB here. */ 12769a1b64d5SAlexander V. Chernikov dst6 = (struct sockaddr *)&pr->ndpr_prefix; 12779a1b64d5SAlexander V. Chernikov 12789a1b64d5SAlexander V. Chernikov /* Restore length field before retrying lookup */ 12799a1b64d5SAlexander V. Chernikov rt_key.sin6_len = sizeof(rt_key); 12809a1b64d5SAlexander V. Chernikov if (rib_lookup_info(fibnum, dst6, 0, 0, &info) != 0) 12814208ea14SHajimu UMEMOTO continue; 1282baf7c373SQing Li /* 1283baf7c373SQing Li * This is the case where multiple interfaces 1284baf7c373SQing Li * have the same prefix, but only one is installed 1285baf7c373SQing Li * into the routing table and that prefix entry 1286baf7c373SQing Li * is not the one being examined here. In the case 1287baf7c373SQing Li * where RADIX_MPATH is enabled, multiple route 1288baf7c373SQing Li * entries (of the same rt_key value) will be 1289baf7c373SQing Li * installed because the interface addresses all 1290baf7c373SQing Li * differ. 1291baf7c373SQing Li */ 1292baf7c373SQing Li if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 12939a1b64d5SAlexander V. Chernikov &rt_key.sin6_addr)) 1294baf7c373SQing Li continue; 1295baf7c373SQing Li } 12964208ea14SHajimu UMEMOTO 12974208ea14SHajimu UMEMOTO if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 12984208ea14SHajimu UMEMOTO &addr->sin6_addr, &pr->ndpr_mask)) 12994208ea14SHajimu UMEMOTO return (1); 130082cd038dSYoshinobu Inoue } 13014208ea14SHajimu UMEMOTO 13024208ea14SHajimu UMEMOTO /* 1303743eee66SSUZUKI Shinsuke * If the address is assigned on the node of the other side of 1304743eee66SSUZUKI Shinsuke * a p2p interface, the address should be a neighbor. 1305743eee66SSUZUKI Shinsuke */ 1306f0316e1aSAlexander V. Chernikov dstaddr = ifa_ifwithdstaddr((const struct sockaddr *)addr, RT_ALL_FIBS); 13078c0fec80SRobert Watson if (dstaddr != NULL) { 13088c0fec80SRobert Watson if (dstaddr->ifa_ifp == ifp) { 13098c0fec80SRobert Watson ifa_free(dstaddr); 1310743eee66SSUZUKI Shinsuke return (1); 13118c0fec80SRobert Watson } 13128c0fec80SRobert Watson ifa_free(dstaddr); 13138c0fec80SRobert Watson } 1314743eee66SSUZUKI Shinsuke 1315743eee66SSUZUKI Shinsuke /* 13164208ea14SHajimu UMEMOTO * If the default router list is empty, all addresses are regarded 13174208ea14SHajimu UMEMOTO * as on-link, and thus, as a neighbor. 13184208ea14SHajimu UMEMOTO */ 1319e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV && 13203b0b2840SJohn Baldwin TAILQ_EMPTY(&V_nd_defrouter) && 1321603724d3SBjoern A. Zeeb V_nd6_defifindex == ifp->if_index) { 132282cd038dSYoshinobu Inoue return (1); 132382cd038dSYoshinobu Inoue } 132482cd038dSYoshinobu Inoue 132577b691e0SBrian Feldman return (0); 132677b691e0SBrian Feldman } 132777b691e0SBrian Feldman 132877b691e0SBrian Feldman 132977b691e0SBrian Feldman /* 133077b691e0SBrian Feldman * Detect if a given IPv6 address identifies a neighbor on a given link. 133177b691e0SBrian Feldman * XXX: should take care of the destination of a p2p link? 133277b691e0SBrian Feldman */ 133377b691e0SBrian Feldman int 1334f0316e1aSAlexander V. Chernikov nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp) 133577b691e0SBrian Feldman { 13366e6b3f7cSQing Li struct llentry *lle; 13376e6b3f7cSQing Li int rc = 0; 133877b691e0SBrian Feldman 13396e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 134077b691e0SBrian Feldman if (nd6_is_new_addr_neighbor(addr, ifp)) 134177b691e0SBrian Feldman return (1); 134277b691e0SBrian Feldman 134382cd038dSYoshinobu Inoue /* 134482cd038dSYoshinobu Inoue * Even if the address matches none of our addresses, it might be 134582cd038dSYoshinobu Inoue * in the neighbor cache. 134682cd038dSYoshinobu Inoue */ 134773cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 13486e6b3f7cSQing Li if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) { 13496e6b3f7cSQing Li LLE_RUNLOCK(lle); 13506e6b3f7cSQing Li rc = 1; 13516e6b3f7cSQing Li } 135273cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 13536e6b3f7cSQing Li return (rc); 135482cd038dSYoshinobu Inoue } 135582cd038dSYoshinobu Inoue 135682cd038dSYoshinobu Inoue /* 135782cd038dSYoshinobu Inoue * Free an nd6 llinfo entry. 1358743eee66SSUZUKI Shinsuke * Since the function would cause significant changes in the kernel, DO NOT 1359743eee66SSUZUKI Shinsuke * make it global, unless you have a strong reason for the change, and are sure 1360743eee66SSUZUKI Shinsuke * that the change is safe. 1361c0b8aeaeSAlexander V. Chernikov * 1362c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 136382cd038dSYoshinobu Inoue */ 1364c0b8aeaeSAlexander V. Chernikov static __noinline void 1365435bece4SMark Johnston nd6_free(struct llentry **lnp, int gc) 136682cd038dSYoshinobu Inoue { 1367e6950476SBjoern A. Zeeb struct ifnet *ifp; 1368435bece4SMark Johnston struct llentry *ln; 1369435bece4SMark Johnston struct nd_defrouter *dr; 1370435bece4SMark Johnston 1371435bece4SMark Johnston ln = *lnp; 1372435bece4SMark Johnston *lnp = NULL; 1373e6950476SBjoern A. Zeeb 1374e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 1375435bece4SMark Johnston ND6_RLOCK_ASSERT(); 1376435bece4SMark Johnston 1377435bece4SMark Johnston ifp = lltable_get_ifp(ln->lle_tbl); 1378435bece4SMark Johnston if ((ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) != 0) 1379435bece4SMark Johnston dr = defrouter_lookup_locked(&ln->r_l3addr.addr6, ifp); 1380435bece4SMark Johnston else 1381435bece4SMark Johnston dr = NULL; 1382435bece4SMark Johnston ND6_RUNLOCK(); 1383435bece4SMark Johnston 1384435bece4SMark Johnston if ((ln->la_flags & LLE_DELETED) == 0) 1385435bece4SMark Johnston EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED); 138682cd038dSYoshinobu Inoue 138782cd038dSYoshinobu Inoue /* 138833841545SHajimu UMEMOTO * we used to have pfctlinput(PRC_HOSTDEAD) here. 138933841545SHajimu UMEMOTO * even though it is not harmful, it was not really necessary. 139082cd038dSYoshinobu Inoue */ 1391686cdd19SJun-ichiro itojun Hagino 1392743eee66SSUZUKI Shinsuke /* cancel timer */ 1393e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, -1); 1394e6950476SBjoern A. Zeeb 1395e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 1396743eee66SSUZUKI Shinsuke if (dr != NULL && dr->expire && 1397743eee66SSUZUKI Shinsuke ln->ln_state == ND6_LLINFO_STALE && gc) { 1398743eee66SSUZUKI Shinsuke /* 1399743eee66SSUZUKI Shinsuke * If the reason for the deletion is just garbage 1400743eee66SSUZUKI Shinsuke * collection, and the neighbor is an active default 1401743eee66SSUZUKI Shinsuke * router, do not delete it. Instead, reset the GC 1402743eee66SSUZUKI Shinsuke * timer using the router's lifetime. 1403743eee66SSUZUKI Shinsuke * Simply deleting the entry would affect default 1404743eee66SSUZUKI Shinsuke * router selection, which is not necessarily a good 1405743eee66SSUZUKI Shinsuke * thing, especially when we're using router preference 1406743eee66SSUZUKI Shinsuke * values. 1407743eee66SSUZUKI Shinsuke * XXX: the check for ln_state would be redundant, 1408743eee66SSUZUKI Shinsuke * but we intentionally keep it just in case. 1409743eee66SSUZUKI Shinsuke */ 14107d26db17SHiroki Sato if (dr->expire > time_uptime) 1411e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 14127d26db17SHiroki Sato (dr->expire - time_uptime) * hz); 1413743eee66SSUZUKI Shinsuke else 1414e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 1415e6950476SBjoern A. Zeeb (long)V_nd6_gctimer * hz); 1416e6950476SBjoern A. Zeeb 1417ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 1418ef8d671cSHajimu UMEMOTO LLE_WUNLOCK(ln); 14194de485feSMark Johnston defrouter_rele(dr); 1420d3cdb716SAlexander V. Chernikov return; 1421743eee66SSUZUKI Shinsuke } 1422743eee66SSUZUKI Shinsuke 1423686cdd19SJun-ichiro itojun Hagino if (dr) { 1424686cdd19SJun-ichiro itojun Hagino /* 1425686cdd19SJun-ichiro itojun Hagino * Unreachablity of a router might affect the default 1426686cdd19SJun-ichiro itojun Hagino * router selection and on-link detection of advertised 1427686cdd19SJun-ichiro itojun Hagino * prefixes. 1428686cdd19SJun-ichiro itojun Hagino */ 1429686cdd19SJun-ichiro itojun Hagino 1430686cdd19SJun-ichiro itojun Hagino /* 1431686cdd19SJun-ichiro itojun Hagino * Temporarily fake the state to choose a new default 1432686cdd19SJun-ichiro itojun Hagino * router and to perform on-link determination of 143388ff5695SSUZUKI Shinsuke * prefixes correctly. 1434686cdd19SJun-ichiro itojun Hagino * Below the state will be set correctly, 1435686cdd19SJun-ichiro itojun Hagino * or the entry itself will be deleted. 1436686cdd19SJun-ichiro itojun Hagino */ 1437686cdd19SJun-ichiro itojun Hagino ln->ln_state = ND6_LLINFO_INCOMPLETE; 14381d5089c2SBjoern A. Zeeb } 1439686cdd19SJun-ichiro itojun Hagino 14401d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) { 14411d5089c2SBjoern A. Zeeb 14421d5089c2SBjoern A. Zeeb /* 14431d5089c2SBjoern A. Zeeb * We need to unlock to avoid a LOR with rt6_flush() with the 14441d5089c2SBjoern A. Zeeb * rnh and for the calls to pfxlist_onlink_check() and 14451d5089c2SBjoern A. Zeeb * defrouter_select() in the block further down for calls 14461d5089c2SBjoern A. Zeeb * into nd6_lookup(). We still hold a ref. 14471d5089c2SBjoern A. Zeeb */ 14481d5089c2SBjoern A. Zeeb LLE_WUNLOCK(ln); 14491d5089c2SBjoern A. Zeeb 14501d5089c2SBjoern A. Zeeb /* 14511d5089c2SBjoern A. Zeeb * rt6_flush must be called whether or not the neighbor 14521d5089c2SBjoern A. Zeeb * is in the Default Router List. 14531d5089c2SBjoern A. Zeeb * See a corresponding comment in nd6_na_input(). 14541d5089c2SBjoern A. Zeeb */ 1455314294deSAlexander V. Chernikov rt6_flush(&ln->r_l3addr.addr6, ifp); 14561d5089c2SBjoern A. Zeeb } 14571d5089c2SBjoern A. Zeeb 14581d5089c2SBjoern A. Zeeb if (dr) { 145933841545SHajimu UMEMOTO /* 146033841545SHajimu UMEMOTO * Since defrouter_select() does not affect the 146133841545SHajimu UMEMOTO * on-link determination and MIP6 needs the check 146233841545SHajimu UMEMOTO * before the default router selection, we perform 146333841545SHajimu UMEMOTO * the check now. 146433841545SHajimu UMEMOTO */ 146533841545SHajimu UMEMOTO pfxlist_onlink_check(); 146633841545SHajimu UMEMOTO 1467686cdd19SJun-ichiro itojun Hagino /* 14681d5089c2SBjoern A. Zeeb * Refresh default router list. 1469686cdd19SJun-ichiro itojun Hagino */ 1470686cdd19SJun-ichiro itojun Hagino defrouter_select(); 1471686cdd19SJun-ichiro itojun Hagino } 14721d5089c2SBjoern A. Zeeb 147317a03656SEric van Gyzen /* 147417a03656SEric van Gyzen * If this entry was added by an on-link redirect, remove the 147517a03656SEric van Gyzen * corresponding host route. 147617a03656SEric van Gyzen */ 147717a03656SEric van Gyzen if (ln->la_flags & LLE_REDIRECT) 147817a03656SEric van Gyzen nd6_free_redirect(ln); 147917a03656SEric van Gyzen 14801d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) 14811d5089c2SBjoern A. Zeeb LLE_WLOCK(ln); 148282cd038dSYoshinobu Inoue } 148382cd038dSYoshinobu Inoue 148433841545SHajimu UMEMOTO /* 1485e6950476SBjoern A. Zeeb * Save to unlock. We still hold an extra reference and will not 1486e6950476SBjoern A. Zeeb * free(9) in llentry_free() if someone else holds one as well. 1487e6950476SBjoern A. Zeeb */ 1488e6950476SBjoern A. Zeeb LLE_WUNLOCK(ln); 14896e6b3f7cSQing Li IF_AFDATA_LOCK(ifp); 14906e6b3f7cSQing Li LLE_WLOCK(ln); 1491b1ec2940SGleb Smirnoff /* Guard against race with other llentry_free(). */ 1492b1ec2940SGleb Smirnoff if (ln->la_flags & LLE_LINKED) { 1493d3cdb716SAlexander V. Chernikov /* Remove callout reference */ 1494becba438SBjoern A. Zeeb LLE_REMREF(ln); 1495d3cdb716SAlexander V. Chernikov lltable_unlink_entry(ln->lle_tbl, ln); 1496d3cdb716SAlexander V. Chernikov } 14976e6b3f7cSQing Li IF_AFDATA_UNLOCK(ifp); 149833841545SHajimu UMEMOTO 1499d3cdb716SAlexander V. Chernikov llentry_free(ln); 15004de485feSMark Johnston if (dr != NULL) 15014de485feSMark Johnston defrouter_rele(dr); 150282cd038dSYoshinobu Inoue } 150382cd038dSYoshinobu Inoue 1504e8b0643eSAlexander V. Chernikov static int 1505e8b0643eSAlexander V. Chernikov nd6_isdynrte(const struct rtentry *rt, void *xap) 1506e8b0643eSAlexander V. Chernikov { 1507e8b0643eSAlexander V. Chernikov 1508e8b0643eSAlexander V. Chernikov if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC)) 1509e8b0643eSAlexander V. Chernikov return (1); 1510e8b0643eSAlexander V. Chernikov 1511e8b0643eSAlexander V. Chernikov return (0); 1512e8b0643eSAlexander V. Chernikov } 151382cd038dSYoshinobu Inoue /* 151417a03656SEric van Gyzen * Remove the rtentry for the given llentry, 151517a03656SEric van Gyzen * both of which were installed by a redirect. 151617a03656SEric van Gyzen */ 151717a03656SEric van Gyzen static void 151817a03656SEric van Gyzen nd6_free_redirect(const struct llentry *ln) 151917a03656SEric van Gyzen { 152017a03656SEric van Gyzen int fibnum; 152117a03656SEric van Gyzen struct sockaddr_in6 sin6; 1522e8b0643eSAlexander V. Chernikov struct rt_addrinfo info; 152317a03656SEric van Gyzen 152417a03656SEric van Gyzen lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6); 1525e8b0643eSAlexander V. Chernikov memset(&info, 0, sizeof(info)); 1526e8b0643eSAlexander V. Chernikov info.rti_info[RTAX_DST] = (struct sockaddr *)&sin6; 1527e8b0643eSAlexander V. Chernikov info.rti_filter = nd6_isdynrte; 152817a03656SEric van Gyzen 1529e8b0643eSAlexander V. Chernikov for (fibnum = 0; fibnum < rt_numfibs; fibnum++) 1530e8b0643eSAlexander V. Chernikov rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum); 153117a03656SEric van Gyzen } 153217a03656SEric van Gyzen 153317a03656SEric van Gyzen /* 15340f1aca65SQing Li * Rejuvenate this function for routing operations related 15350f1aca65SQing Li * processing. 15360f1aca65SQing Li */ 15370f1aca65SQing Li void 15380f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info) 15390f1aca65SQing Li { 154039e19560SBjoern A. Zeeb struct sockaddr_in6 *gateway; 15410f1aca65SQing Li struct nd_defrouter *dr; 154239e19560SBjoern A. Zeeb struct ifnet *ifp; 15430f1aca65SQing Li 154439e19560SBjoern A. Zeeb gateway = (struct sockaddr_in6 *)rt->rt_gateway; 154539e19560SBjoern A. Zeeb ifp = rt->rt_ifp; 15460f1aca65SQing Li 15470f1aca65SQing Li switch (req) { 15480f1aca65SQing Li case RTM_ADD: 15490f1aca65SQing Li break; 15500f1aca65SQing Li 15510f1aca65SQing Li case RTM_DELETE: 15520f1aca65SQing Li if (!ifp) 15530f1aca65SQing Li return; 15540f1aca65SQing Li /* 15550f1aca65SQing Li * Only indirect routes are interesting. 15560f1aca65SQing Li */ 15570f1aca65SQing Li if ((rt->rt_flags & RTF_GATEWAY) == 0) 15580f1aca65SQing Li return; 15590f1aca65SQing Li /* 15600f1aca65SQing Li * check for default route 15610f1aca65SQing Li */ 15620f1aca65SQing Li if (IN6_ARE_ADDR_EQUAL(&in6addr_any, 15630f1aca65SQing Li &SIN6(rt_key(rt))->sin6_addr)) { 15640f1aca65SQing Li dr = defrouter_lookup(&gateway->sin6_addr, ifp); 15654de485feSMark Johnston if (dr != NULL) { 15660f1aca65SQing Li dr->installed = 0; 15674de485feSMark Johnston defrouter_rele(dr); 15684de485feSMark Johnston } 15690f1aca65SQing Li } 15700f1aca65SQing Li break; 15710f1aca65SQing Li } 15720f1aca65SQing Li } 15730f1aca65SQing Li 15740f1aca65SQing Li 157582cd038dSYoshinobu Inoue int 15761272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp) 157782cd038dSYoshinobu Inoue { 157882cd038dSYoshinobu Inoue struct in6_ndireq *ndi = (struct in6_ndireq *)data; 157982cd038dSYoshinobu Inoue struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1580686cdd19SJun-ichiro itojun Hagino struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1581d0bec2c5SHiroki Sato int error = 0; 158282cd038dSYoshinobu Inoue 15830de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 15840de0dd9bSHiroki Sato return (EPFNOSUPPORT); 158582cd038dSYoshinobu Inoue switch (cmd) { 158633841545SHajimu UMEMOTO case OSIOCGIFINFO_IN6: 15872ce62dceSSUZUKI Shinsuke #define ND ndi->ndi 158831b1bfe1SHajimu UMEMOTO /* XXX: old ndp(8) assumes a positive value for linkmtu. */ 15892ce62dceSSUZUKI Shinsuke bzero(&ND, sizeof(ND)); 15902ce62dceSSUZUKI Shinsuke ND.linkmtu = IN6_LINKMTU(ifp); 15912ce62dceSSUZUKI Shinsuke ND.maxmtu = ND_IFINFO(ifp)->maxmtu; 15922ce62dceSSUZUKI Shinsuke ND.basereachable = ND_IFINFO(ifp)->basereachable; 15932ce62dceSSUZUKI Shinsuke ND.reachable = ND_IFINFO(ifp)->reachable; 15942ce62dceSSUZUKI Shinsuke ND.retrans = ND_IFINFO(ifp)->retrans; 15952ce62dceSSUZUKI Shinsuke ND.flags = ND_IFINFO(ifp)->flags; 15962ce62dceSSUZUKI Shinsuke ND.recalctm = ND_IFINFO(ifp)->recalctm; 15972ce62dceSSUZUKI Shinsuke ND.chlim = ND_IFINFO(ifp)->chlim; 159833841545SHajimu UMEMOTO break; 159982cd038dSYoshinobu Inoue case SIOCGIFINFO_IN6: 16002ce62dceSSUZUKI Shinsuke ND = *ND_IFINFO(ifp); 160182cd038dSYoshinobu Inoue break; 1602b9204379SSUZUKI Shinsuke case SIOCSIFINFO_IN6: 1603b9204379SSUZUKI Shinsuke /* 1604b9204379SSUZUKI Shinsuke * used to change host variables from userland. 1605a4641f4eSPedro F. Giffuni * intended for a use on router to reflect RA configurations. 1606b9204379SSUZUKI Shinsuke */ 1607b9204379SSUZUKI Shinsuke /* 0 means 'unspecified' */ 1608b9204379SSUZUKI Shinsuke if (ND.linkmtu != 0) { 1609b9204379SSUZUKI Shinsuke if (ND.linkmtu < IPV6_MMTU || 1610b9204379SSUZUKI Shinsuke ND.linkmtu > IN6_LINKMTU(ifp)) { 1611b9204379SSUZUKI Shinsuke error = EINVAL; 1612b9204379SSUZUKI Shinsuke break; 1613b9204379SSUZUKI Shinsuke } 1614b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->linkmtu = ND.linkmtu; 1615b9204379SSUZUKI Shinsuke } 1616b9204379SSUZUKI Shinsuke 1617b9204379SSUZUKI Shinsuke if (ND.basereachable != 0) { 1618b9204379SSUZUKI Shinsuke int obasereachable = ND_IFINFO(ifp)->basereachable; 1619b9204379SSUZUKI Shinsuke 1620b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->basereachable = ND.basereachable; 1621b9204379SSUZUKI Shinsuke if (ND.basereachable != obasereachable) 1622b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->reachable = 1623b9204379SSUZUKI Shinsuke ND_COMPUTE_RTIME(ND.basereachable); 1624b9204379SSUZUKI Shinsuke } 1625b9204379SSUZUKI Shinsuke if (ND.retrans != 0) 1626b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->retrans = ND.retrans; 1627b9204379SSUZUKI Shinsuke if (ND.chlim != 0) 1628b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->chlim = ND.chlim; 1629b9204379SSUZUKI Shinsuke /* FALLTHROUGH */ 1630686cdd19SJun-ichiro itojun Hagino case SIOCSIFINFO_FLAGS: 1631a283298cSHiroki Sato { 1632a283298cSHiroki Sato struct ifaddr *ifa; 1633a283298cSHiroki Sato struct in6_ifaddr *ia; 1634a283298cSHiroki Sato 1635a283298cSHiroki Sato if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1636a283298cSHiroki Sato !(ND.flags & ND6_IFF_IFDISABLED)) { 1637a283298cSHiroki Sato /* ifdisabled 1->0 transision */ 1638a283298cSHiroki Sato 1639a283298cSHiroki Sato /* 1640a283298cSHiroki Sato * If the interface is marked as ND6_IFF_IFDISABLED and 1641a283298cSHiroki Sato * has an link-local address with IN6_IFF_DUPLICATED, 1642a283298cSHiroki Sato * do not clear ND6_IFF_IFDISABLED. 1643a283298cSHiroki Sato * See RFC 4862, Section 5.4.5. 1644a283298cSHiroki Sato */ 1645137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1646a283298cSHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1647a283298cSHiroki Sato if (ifa->ifa_addr->sa_family != AF_INET6) 1648a283298cSHiroki Sato continue; 1649a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1650a283298cSHiroki Sato if ((ia->ia6_flags & IN6_IFF_DUPLICATED) && 1651d0bec2c5SHiroki Sato IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 1652a283298cSHiroki Sato break; 1653a283298cSHiroki Sato } 1654137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1655a283298cSHiroki Sato 1656d0bec2c5SHiroki Sato if (ifa != NULL) { 1657d0bec2c5SHiroki Sato /* LLA is duplicated. */ 1658a283298cSHiroki Sato ND.flags |= ND6_IFF_IFDISABLED; 1659a283298cSHiroki Sato log(LOG_ERR, "Cannot enable an interface" 1660a283298cSHiroki Sato " with a link-local address marked" 1661a283298cSHiroki Sato " duplicate.\n"); 1662a283298cSHiroki Sato } else { 1663a283298cSHiroki Sato ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED; 1664154d5f73SHiroki Sato if (ifp->if_flags & IFF_UP) 1665a283298cSHiroki Sato in6_if_up(ifp); 1666a283298cSHiroki Sato } 1667a283298cSHiroki Sato } else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1668a283298cSHiroki Sato (ND.flags & ND6_IFF_IFDISABLED)) { 1669a283298cSHiroki Sato /* ifdisabled 0->1 transision */ 1670a283298cSHiroki Sato /* Mark all IPv6 address as tentative. */ 1671a283298cSHiroki Sato 1672a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED; 16736401c828SHiroki Sato if (V_ip6_dad_count > 0 && 16746401c828SHiroki Sato (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) { 1675137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1676d0bec2c5SHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, 1677d0bec2c5SHiroki Sato ifa_link) { 1678d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1679d0bec2c5SHiroki Sato AF_INET6) 1680a283298cSHiroki Sato continue; 1681a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1682a283298cSHiroki Sato ia->ia6_flags |= IN6_IFF_TENTATIVE; 1683a283298cSHiroki Sato } 1684137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1685a283298cSHiroki Sato } 1686d0bec2c5SHiroki Sato } 1687a283298cSHiroki Sato 1688154d5f73SHiroki Sato if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) { 1689154d5f73SHiroki Sato if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) { 1690a283298cSHiroki Sato /* auto_linklocal 0->1 transision */ 1691a283298cSHiroki Sato 1692a283298cSHiroki Sato /* If no link-local address on ifp, configure */ 1693a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL; 1694a283298cSHiroki Sato in6_ifattach(ifp, NULL); 1695154d5f73SHiroki Sato } else if (!(ND.flags & ND6_IFF_IFDISABLED) && 1696154d5f73SHiroki Sato ifp->if_flags & IFF_UP) { 169777bc4985SHiroki Sato /* 169877bc4985SHiroki Sato * When the IF already has 1699154d5f73SHiroki Sato * ND6_IFF_AUTO_LINKLOCAL, no link-local 1700154d5f73SHiroki Sato * address is assigned, and IFF_UP, try to 1701154d5f73SHiroki Sato * assign one. 170277bc4985SHiroki Sato */ 1703137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1704d0bec2c5SHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, 1705d0bec2c5SHiroki Sato ifa_link) { 1706d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1707d0bec2c5SHiroki Sato AF_INET6) 170877bc4985SHiroki Sato continue; 170977bc4985SHiroki Sato ia = (struct in6_ifaddr *)ifa; 1710d0bec2c5SHiroki Sato if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 171177bc4985SHiroki Sato break; 171277bc4985SHiroki Sato } 1713137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1714d0bec2c5SHiroki Sato if (ifa != NULL) 1715d0bec2c5SHiroki Sato /* No LLA is configured. */ 171677bc4985SHiroki Sato in6_ifattach(ifp, NULL); 1717a283298cSHiroki Sato } 1718a283298cSHiroki Sato } 1719154d5f73SHiroki Sato } 17202ce62dceSSUZUKI Shinsuke ND_IFINFO(ifp)->flags = ND.flags; 1721686cdd19SJun-ichiro itojun Hagino break; 17222ce62dceSSUZUKI Shinsuke #undef ND 1723686cdd19SJun-ichiro itojun Hagino case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1724743eee66SSUZUKI Shinsuke /* sync kernel routing table with the default router list */ 1725743eee66SSUZUKI Shinsuke defrouter_reset(); 1726686cdd19SJun-ichiro itojun Hagino defrouter_select(); 172782cd038dSYoshinobu Inoue break; 172882cd038dSYoshinobu Inoue case SIOCSPFXFLUSH_IN6: 172982cd038dSYoshinobu Inoue { 173082cd038dSYoshinobu Inoue /* flush all the prefix advertised by routers */ 173182cd038dSYoshinobu Inoue struct nd_prefix *pr, *next; 173282cd038dSYoshinobu Inoue 17333b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) { 173433841545SHajimu UMEMOTO struct in6_ifaddr *ia, *ia_next; 173533841545SHajimu UMEMOTO 173633841545SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) 173733841545SHajimu UMEMOTO continue; /* XXX */ 173833841545SHajimu UMEMOTO 173933841545SHajimu UMEMOTO /* do we really have to remove addresses as well? */ 1740d1da0a06SRobert Watson /* XXXRW: in6_ifaddrhead locking. */ 174180af0152SRobert Watson TAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link, 174280af0152SRobert Watson ia_next) { 174333841545SHajimu UMEMOTO if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) 174433841545SHajimu UMEMOTO continue; 174533841545SHajimu UMEMOTO 174633841545SHajimu UMEMOTO if (ia->ia6_ndpr == pr) 174733841545SHajimu UMEMOTO in6_purgeaddr(&ia->ia_ifa); 174833841545SHajimu UMEMOTO } 174982cd038dSYoshinobu Inoue prelist_remove(pr); 175082cd038dSYoshinobu Inoue } 175182cd038dSYoshinobu Inoue break; 175282cd038dSYoshinobu Inoue } 175382cd038dSYoshinobu Inoue case SIOCSRTRFLUSH_IN6: 175482cd038dSYoshinobu Inoue { 175582cd038dSYoshinobu Inoue /* flush all the default routers */ 17564de485feSMark Johnston struct nd_drhead drq; 17574de485feSMark Johnston struct nd_defrouter *dr; 17584de485feSMark Johnston 17594de485feSMark Johnston TAILQ_INIT(&drq); 176082cd038dSYoshinobu Inoue 1761743eee66SSUZUKI Shinsuke defrouter_reset(); 17624de485feSMark Johnston 17634de485feSMark Johnston ND6_WLOCK(); 17644de485feSMark Johnston while ((dr = TAILQ_FIRST(&V_nd_defrouter)) != NULL) 17654de485feSMark Johnston defrouter_unlink(dr, &drq); 17664de485feSMark Johnston ND6_WUNLOCK(); 17674de485feSMark Johnston while ((dr = TAILQ_FIRST(&drq)) != NULL) { 17684de485feSMark Johnston TAILQ_REMOVE(&drq, dr, dr_entry); 17694de485feSMark Johnston defrouter_del(dr); 177082cd038dSYoshinobu Inoue } 17714de485feSMark Johnston 1772743eee66SSUZUKI Shinsuke defrouter_select(); 177382cd038dSYoshinobu Inoue break; 177482cd038dSYoshinobu Inoue } 177582cd038dSYoshinobu Inoue case SIOCGNBRINFO_IN6: 177682cd038dSYoshinobu Inoue { 17776e6b3f7cSQing Li struct llentry *ln; 177882cd038dSYoshinobu Inoue struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 177982cd038dSYoshinobu Inoue 1780a1f7e5f8SHajimu UMEMOTO if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0) 1781a1f7e5f8SHajimu UMEMOTO return (error); 178282cd038dSYoshinobu Inoue 178373cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 17846e6b3f7cSQing Li ln = nd6_lookup(&nb_addr, 0, ifp); 178573cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 17866e6b3f7cSQing Li 17876e6b3f7cSQing Li if (ln == NULL) { 178882cd038dSYoshinobu Inoue error = EINVAL; 178982cd038dSYoshinobu Inoue break; 179082cd038dSYoshinobu Inoue } 179182cd038dSYoshinobu Inoue nbi->state = ln->ln_state; 17926e6b3f7cSQing Li nbi->asked = ln->la_asked; 179382cd038dSYoshinobu Inoue nbi->isrouter = ln->ln_router; 17945a041915SHiroki Sato if (ln->la_expire == 0) 17955a041915SHiroki Sato nbi->expire = 0; 17965a041915SHiroki Sato else 1797427c2f4eSAlexander V. Chernikov nbi->expire = ln->la_expire + ln->lle_remtime / hz + 17985a041915SHiroki Sato (time_second - time_uptime); 17996e6b3f7cSQing Li LLE_RUNLOCK(ln); 180082cd038dSYoshinobu Inoue break; 180182cd038dSYoshinobu Inoue } 1802686cdd19SJun-ichiro itojun Hagino case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1803603724d3SBjoern A. Zeeb ndif->ifindex = V_nd6_defifindex; 1804686cdd19SJun-ichiro itojun Hagino break; 1805686cdd19SJun-ichiro itojun Hagino case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1806686cdd19SJun-ichiro itojun Hagino return (nd6_setdefaultiface(ndif->ifindex)); 180782cd038dSYoshinobu Inoue } 180882cd038dSYoshinobu Inoue return (error); 180982cd038dSYoshinobu Inoue } 181082cd038dSYoshinobu Inoue 181182cd038dSYoshinobu Inoue /* 18120e2dcee6SAlexander V. Chernikov * Calculates new isRouter value based on provided parameters and 18130e2dcee6SAlexander V. Chernikov * returns it. 18140e2dcee6SAlexander V. Chernikov */ 18150e2dcee6SAlexander V. Chernikov static int 18160e2dcee6SAlexander V. Chernikov nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr, 18170e2dcee6SAlexander V. Chernikov int ln_router) 18180e2dcee6SAlexander V. Chernikov { 18190e2dcee6SAlexander V. Chernikov 18200e2dcee6SAlexander V. Chernikov /* 18210e2dcee6SAlexander V. Chernikov * ICMP6 type dependent behavior. 18220e2dcee6SAlexander V. Chernikov * 18230e2dcee6SAlexander V. Chernikov * NS: clear IsRouter if new entry 18240e2dcee6SAlexander V. Chernikov * RS: clear IsRouter 18250e2dcee6SAlexander V. Chernikov * RA: set IsRouter if there's lladdr 18260e2dcee6SAlexander V. Chernikov * redir: clear IsRouter if new entry 18270e2dcee6SAlexander V. Chernikov * 18280e2dcee6SAlexander V. Chernikov * RA case, (1): 18290e2dcee6SAlexander V. Chernikov * The spec says that we must set IsRouter in the following cases: 18300e2dcee6SAlexander V. Chernikov * - If lladdr exist, set IsRouter. This means (1-5). 18310e2dcee6SAlexander V. Chernikov * - If it is old entry (!newentry), set IsRouter. This means (7). 18320e2dcee6SAlexander V. Chernikov * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 18330e2dcee6SAlexander V. Chernikov * A quetion arises for (1) case. (1) case has no lladdr in the 18340e2dcee6SAlexander V. Chernikov * neighbor cache, this is similar to (6). 18350e2dcee6SAlexander V. Chernikov * This case is rare but we figured that we MUST NOT set IsRouter. 18360e2dcee6SAlexander V. Chernikov * 183741a31e78SAlexander V. Chernikov * is_new old_addr new_addr NS RS RA redir 18380e2dcee6SAlexander V. Chernikov * D R 183941a31e78SAlexander V. Chernikov * 0 n n (1) c ? s 184041a31e78SAlexander V. Chernikov * 0 y n (2) c s s 184141a31e78SAlexander V. Chernikov * 0 n y (3) c s s 184241a31e78SAlexander V. Chernikov * 0 y y (4) c s s 184341a31e78SAlexander V. Chernikov * 0 y y (5) c s s 184441a31e78SAlexander V. Chernikov * 1 -- n (6) c c c s 184541a31e78SAlexander V. Chernikov * 1 -- y (7) c c s c s 18460e2dcee6SAlexander V. Chernikov * 18470e2dcee6SAlexander V. Chernikov * (c=clear s=set) 18480e2dcee6SAlexander V. Chernikov */ 18490e2dcee6SAlexander V. Chernikov switch (type & 0xff) { 18500e2dcee6SAlexander V. Chernikov case ND_NEIGHBOR_SOLICIT: 18510e2dcee6SAlexander V. Chernikov /* 18520e2dcee6SAlexander V. Chernikov * New entry must have is_router flag cleared. 18530e2dcee6SAlexander V. Chernikov */ 18540e2dcee6SAlexander V. Chernikov if (is_new) /* (6-7) */ 18550e2dcee6SAlexander V. Chernikov ln_router = 0; 18560e2dcee6SAlexander V. Chernikov break; 18570e2dcee6SAlexander V. Chernikov case ND_REDIRECT: 18580e2dcee6SAlexander V. Chernikov /* 18590e2dcee6SAlexander V. Chernikov * If the icmp is a redirect to a better router, always set the 18600e2dcee6SAlexander V. Chernikov * is_router flag. Otherwise, if the entry is newly created, 18610e2dcee6SAlexander V. Chernikov * clear the flag. [RFC 2461, sec 8.3] 18620e2dcee6SAlexander V. Chernikov */ 18630e2dcee6SAlexander V. Chernikov if (code == ND_REDIRECT_ROUTER) 18640e2dcee6SAlexander V. Chernikov ln_router = 1; 18650e2dcee6SAlexander V. Chernikov else { 18660e2dcee6SAlexander V. Chernikov if (is_new) /* (6-7) */ 18670e2dcee6SAlexander V. Chernikov ln_router = 0; 18680e2dcee6SAlexander V. Chernikov } 18690e2dcee6SAlexander V. Chernikov break; 18700e2dcee6SAlexander V. Chernikov case ND_ROUTER_SOLICIT: 18710e2dcee6SAlexander V. Chernikov /* 18720e2dcee6SAlexander V. Chernikov * is_router flag must always be cleared. 18730e2dcee6SAlexander V. Chernikov */ 18740e2dcee6SAlexander V. Chernikov ln_router = 0; 18750e2dcee6SAlexander V. Chernikov break; 18760e2dcee6SAlexander V. Chernikov case ND_ROUTER_ADVERT: 18770e2dcee6SAlexander V. Chernikov /* 18780e2dcee6SAlexander V. Chernikov * Mark an entry with lladdr as a router. 18790e2dcee6SAlexander V. Chernikov */ 18800e2dcee6SAlexander V. Chernikov if ((!is_new && (old_addr || new_addr)) || /* (2-5) */ 18810e2dcee6SAlexander V. Chernikov (is_new && new_addr)) { /* (7) */ 18820e2dcee6SAlexander V. Chernikov ln_router = 1; 18830e2dcee6SAlexander V. Chernikov } 18840e2dcee6SAlexander V. Chernikov break; 18850e2dcee6SAlexander V. Chernikov } 18860e2dcee6SAlexander V. Chernikov 18870e2dcee6SAlexander V. Chernikov return (ln_router); 18880e2dcee6SAlexander V. Chernikov } 18890e2dcee6SAlexander V. Chernikov 18900e2dcee6SAlexander V. Chernikov /* 189182cd038dSYoshinobu Inoue * Create neighbor cache entry and cache link-layer address, 189282cd038dSYoshinobu Inoue * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 18931272577eSXin LI * 18941272577eSXin LI * type - ICMP6 type 18951272577eSXin LI * code - type dependent information 18966e6b3f7cSQing Li * 189782cd038dSYoshinobu Inoue */ 18980e2dcee6SAlexander V. Chernikov void 18991272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr, 19001272577eSXin LI int lladdrlen, int type, int code) 190182cd038dSYoshinobu Inoue { 19025a255516SAlexander V. Chernikov struct llentry *ln = NULL, *ln_tmp; 190382cd038dSYoshinobu Inoue int is_newentry; 190482cd038dSYoshinobu Inoue int do_update; 190582cd038dSYoshinobu Inoue int olladdr; 190682cd038dSYoshinobu Inoue int llchange; 190768352503SBjoern A. Zeeb int flags; 19083d3728e9SQing Li uint16_t router = 0; 19096e6b3f7cSQing Li struct sockaddr_in6 sin6; 1910fd14c50bSKip Macy struct mbuf *chain = NULL; 19114fb3a820SAlexander V. Chernikov u_char linkhdr[LLE_MAX_LINKHDR]; 19124fb3a820SAlexander V. Chernikov size_t linkhdrsize; 19134fb3a820SAlexander V. Chernikov int lladdr_off; 19146e6b3f7cSQing Li 19156e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 191682cd038dSYoshinobu Inoue 191739e19560SBjoern A. Zeeb KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__)); 191839e19560SBjoern A. Zeeb KASSERT(from != NULL, ("%s: from == NULL", __func__)); 191982cd038dSYoshinobu Inoue 192082cd038dSYoshinobu Inoue /* nothing must be updated for unspecified address */ 192182cd038dSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED(from)) 19220e2dcee6SAlexander V. Chernikov return; 192382cd038dSYoshinobu Inoue 192482cd038dSYoshinobu Inoue /* 192582cd038dSYoshinobu Inoue * Validation about ifp->if_addrlen and lladdrlen must be done in 192682cd038dSYoshinobu Inoue * the caller. 192782cd038dSYoshinobu Inoue * 192882cd038dSYoshinobu Inoue * XXX If the link does not have link-layer adderss, what should 192982cd038dSYoshinobu Inoue * we do? (ifp->if_addrlen == 0) 193082cd038dSYoshinobu Inoue * Spec says nothing in sections for RA, RS and NA. There's small 193182cd038dSYoshinobu Inoue * description on it in NS section (RFC 2461 7.2.3). 193282cd038dSYoshinobu Inoue */ 1933f506d933SAlexander V. Chernikov flags = lladdr ? LLE_EXCLUSIVE : 0; 1934ea0c3776SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 19356e6b3f7cSQing Li ln = nd6_lookup(from, flags, ifp); 1936ea0c3776SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 19375a255516SAlexander V. Chernikov is_newentry = 0; 19386e6b3f7cSQing Li if (ln == NULL) { 1939f506d933SAlexander V. Chernikov flags |= LLE_EXCLUSIVE; 19405a255516SAlexander V. Chernikov ln = nd6_alloc(from, 0, ifp); 19415a255516SAlexander V. Chernikov if (ln == NULL) 19420e2dcee6SAlexander V. Chernikov return; 1943501adf01SAlexander V. Chernikov 1944501adf01SAlexander V. Chernikov /* 1945501adf01SAlexander V. Chernikov * Since we already know all the data for the new entry, 1946501adf01SAlexander V. Chernikov * fill it before insertion. 1947501adf01SAlexander V. Chernikov */ 19484fb3a820SAlexander V. Chernikov if (lladdr != NULL) { 19494fb3a820SAlexander V. Chernikov linkhdrsize = sizeof(linkhdr); 19504fb3a820SAlexander V. Chernikov if (lltable_calc_llheader(ifp, AF_INET6, lladdr, 19514fb3a820SAlexander V. Chernikov linkhdr, &linkhdrsize, &lladdr_off) != 0) 19524fb3a820SAlexander V. Chernikov return; 19534fb3a820SAlexander V. Chernikov lltable_set_entry_addr(ifp, ln, linkhdr, linkhdrsize, 19544fb3a820SAlexander V. Chernikov lladdr_off); 19554fb3a820SAlexander V. Chernikov } 19564fb3a820SAlexander V. Chernikov 19575a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 19585a255516SAlexander V. Chernikov LLE_WLOCK(ln); 19595a255516SAlexander V. Chernikov /* Prefer any existing lle over newly-created one */ 1960f506d933SAlexander V. Chernikov ln_tmp = nd6_lookup(from, LLE_EXCLUSIVE, ifp); 19615a255516SAlexander V. Chernikov if (ln_tmp == NULL) 19625a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 19635a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 19641496229aSAlexander V. Chernikov if (ln_tmp == NULL) { 1965ab415c83SAlexander V. Chernikov /* No existing lle, mark as new entry (6,7) */ 196682cd038dSYoshinobu Inoue is_newentry = 1; 1967aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); 1968ab415c83SAlexander V. Chernikov if (lladdr != NULL) /* (7) */ 1969ab415c83SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, 1970ab415c83SAlexander V. Chernikov LLENTRY_RESOLVED); 19711496229aSAlexander V. Chernikov } else { 19725a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), ln); 19735a255516SAlexander V. Chernikov ln = ln_tmp; 19745a255516SAlexander V. Chernikov ln_tmp = NULL; 19755a255516SAlexander V. Chernikov } 19765a255516SAlexander V. Chernikov } 197733841545SHajimu UMEMOTO /* do nothing if static ndp is set */ 19785a255516SAlexander V. Chernikov if ((ln->la_flags & LLE_STATIC)) { 1979f506d933SAlexander V. Chernikov if (flags & LLE_EXCLUSIVE) 19800e2dcee6SAlexander V. Chernikov LLE_WUNLOCK(ln); 19810e2dcee6SAlexander V. Chernikov else 19820e2dcee6SAlexander V. Chernikov LLE_RUNLOCK(ln); 19830e2dcee6SAlexander V. Chernikov return; 19843d3728e9SQing Li } 198582cd038dSYoshinobu Inoue 19866e6b3f7cSQing Li olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0; 198782cd038dSYoshinobu Inoue if (olladdr && lladdr) { 19884fb3a820SAlexander V. Chernikov llchange = bcmp(lladdr, ln->ll_addr, 19896e6b3f7cSQing Li ifp->if_addrlen); 199041a31e78SAlexander V. Chernikov } else if (!olladdr && lladdr) 199141a31e78SAlexander V. Chernikov llchange = 1; 199241a31e78SAlexander V. Chernikov else 199382cd038dSYoshinobu Inoue llchange = 0; 199482cd038dSYoshinobu Inoue 199582cd038dSYoshinobu Inoue /* 199682cd038dSYoshinobu Inoue * newentry olladdr lladdr llchange (*=record) 199782cd038dSYoshinobu Inoue * 0 n n -- (1) 199882cd038dSYoshinobu Inoue * 0 y n -- (2) 199941a31e78SAlexander V. Chernikov * 0 n y y (3) * STALE 200082cd038dSYoshinobu Inoue * 0 y y n (4) * 200182cd038dSYoshinobu Inoue * 0 y y y (5) * STALE 200282cd038dSYoshinobu Inoue * 1 -- n -- (6) NOSTATE(= PASSIVE) 200382cd038dSYoshinobu Inoue * 1 -- y -- (7) * STALE 200482cd038dSYoshinobu Inoue */ 200582cd038dSYoshinobu Inoue 2006501adf01SAlexander V. Chernikov do_update = 0; 20077503e0c7SAlexander V. Chernikov if (is_newentry == 0 && llchange != 0) { 2008501adf01SAlexander V. Chernikov do_update = 1; /* (3,5) */ 2009501adf01SAlexander V. Chernikov 201082cd038dSYoshinobu Inoue /* 201182cd038dSYoshinobu Inoue * Record source link-layer address 201282cd038dSYoshinobu Inoue * XXX is it dependent to ifp->if_type? 201382cd038dSYoshinobu Inoue */ 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 20194fb3a820SAlexander V. Chernikov if (lltable_try_set_entry_addr(ifp, ln, linkhdr, linkhdrsize, 20204fb3a820SAlexander V. Chernikov lladdr_off) == 0) { 202112cb7521SAlexander V. Chernikov /* Entry was deleted */ 202212cb7521SAlexander V. Chernikov return; 202312cb7521SAlexander V. Chernikov } 202412cb7521SAlexander V. Chernikov 2025aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_STALE); 202682cd038dSYoshinobu Inoue 2027501adf01SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 202882cd038dSYoshinobu Inoue 2029d7968c29SAlexander V. Chernikov if (ln->la_hold != NULL) 2030d7968c29SAlexander V. Chernikov nd6_grab_holdchain(ln, &chain, &sin6); 203182cd038dSYoshinobu Inoue } 203282cd038dSYoshinobu Inoue 20330e2dcee6SAlexander V. Chernikov /* Calculates new router status */ 20340e2dcee6SAlexander V. Chernikov router = nd6_is_router(type, code, is_newentry, olladdr, 20350e2dcee6SAlexander V. Chernikov lladdr != NULL ? 1 : 0, ln->ln_router); 203682cd038dSYoshinobu Inoue 20370e2dcee6SAlexander V. Chernikov ln->ln_router = router; 20380e2dcee6SAlexander V. Chernikov /* Mark non-router redirects with special flag */ 20390e2dcee6SAlexander V. Chernikov if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER) 20400e2dcee6SAlexander V. Chernikov ln->la_flags |= LLE_REDIRECT; 2041c2b3a02bSKip Macy 2042f506d933SAlexander V. Chernikov if (flags & LLE_EXCLUSIVE) 20436e6b3f7cSQing Li LLE_WUNLOCK(ln); 20446e6b3f7cSQing Li else 20456e6b3f7cSQing Li LLE_RUNLOCK(ln); 20460e2dcee6SAlexander V. Chernikov 2047d7968c29SAlexander V. Chernikov if (chain != NULL) 2048d7968c29SAlexander V. Chernikov nd6_flush_holdchain(ifp, ifp, chain, &sin6); 20496e6b3f7cSQing Li 2050554bf4aaSHajimu UMEMOTO /* 2051554bf4aaSHajimu UMEMOTO * When the link-layer address of a router changes, select the 2052554bf4aaSHajimu UMEMOTO * best router again. In particular, when the neighbor entry is newly 2053554bf4aaSHajimu UMEMOTO * created, it might affect the selection policy. 2054554bf4aaSHajimu UMEMOTO * Question: can we restrict the first condition to the "is_newentry" 2055554bf4aaSHajimu UMEMOTO * case? 2056554bf4aaSHajimu UMEMOTO * XXX: when we hear an RA from a new router with the link-layer 2057554bf4aaSHajimu UMEMOTO * address option, defrouter_select() is called twice, since 2058554bf4aaSHajimu UMEMOTO * defrtrlist_update called the function as well. However, I believe 2059554bf4aaSHajimu UMEMOTO * we can compromise the overhead, since it only happens the first 2060554bf4aaSHajimu UMEMOTO * time. 2061554bf4aaSHajimu UMEMOTO * XXX: although defrouter_select() should not have a bad effect 2062554bf4aaSHajimu UMEMOTO * for those are not autoconfigured hosts, we explicitly avoid such 2063554bf4aaSHajimu UMEMOTO * cases for safety. 2064554bf4aaSHajimu UMEMOTO */ 2065501adf01SAlexander V. Chernikov if ((do_update || is_newentry) && router && 2066a283298cSHiroki Sato ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 20676e6b3f7cSQing Li /* 20686e6b3f7cSQing Li * guaranteed recursion 20696e6b3f7cSQing Li */ 2070554bf4aaSHajimu UMEMOTO defrouter_select(); 20716e6b3f7cSQing Li } 207282cd038dSYoshinobu Inoue } 207382cd038dSYoshinobu Inoue 207482cd038dSYoshinobu Inoue static void 20758b615593SMarko Zec nd6_slowtimo(void *arg) 207682cd038dSYoshinobu Inoue { 20778b615593SMarko Zec CURVNET_SET((struct vnet *) arg); 207833841545SHajimu UMEMOTO struct nd_ifinfo *nd6if; 207931b1bfe1SHajimu UMEMOTO struct ifnet *ifp; 208082cd038dSYoshinobu Inoue 2081603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 2082f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 208377dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 2084e6abaf91SGleb Smirnoff TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 20850de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 20860de0dd9bSHiroki Sato continue; 208731b1bfe1SHajimu UMEMOTO nd6if = ND_IFINFO(ifp); 208882cd038dSYoshinobu Inoue if (nd6if->basereachable && /* already initialized */ 208982cd038dSYoshinobu Inoue (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 209082cd038dSYoshinobu Inoue /* 209182cd038dSYoshinobu Inoue * Since reachable time rarely changes by router 209282cd038dSYoshinobu Inoue * advertisements, we SHOULD insure that a new random 209382cd038dSYoshinobu Inoue * value gets recomputed at least once every few hours. 209482cd038dSYoshinobu Inoue * (RFC 2461, 6.3.4) 209582cd038dSYoshinobu Inoue */ 2096603724d3SBjoern A. Zeeb nd6if->recalctm = V_nd6_recalc_reachtm_interval; 209782cd038dSYoshinobu Inoue nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 209882cd038dSYoshinobu Inoue } 209982cd038dSYoshinobu Inoue } 210077dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 21018b615593SMarko Zec CURVNET_RESTORE(); 210282cd038dSYoshinobu Inoue } 210382cd038dSYoshinobu Inoue 2104d7968c29SAlexander V. Chernikov void 2105d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain, 2106d7968c29SAlexander V. Chernikov struct sockaddr_in6 *sin6) 2107d7968c29SAlexander V. Chernikov { 2108d7968c29SAlexander V. Chernikov 2109d7968c29SAlexander V. Chernikov LLE_WLOCK_ASSERT(ln); 2110d7968c29SAlexander V. Chernikov 2111d7968c29SAlexander V. Chernikov *chain = ln->la_hold; 2112d7968c29SAlexander V. Chernikov ln->la_hold = NULL; 2113314294deSAlexander V. Chernikov lltable_fill_sa_entry(ln, (struct sockaddr *)sin6); 2114d7968c29SAlexander V. Chernikov 2115d7968c29SAlexander V. Chernikov if (ln->ln_state == ND6_LLINFO_STALE) { 2116d7968c29SAlexander V. Chernikov 2117d7968c29SAlexander V. Chernikov /* 2118d7968c29SAlexander V. Chernikov * The first time we send a packet to a 2119d7968c29SAlexander V. Chernikov * neighbor whose entry is STALE, we have 2120d7968c29SAlexander V. Chernikov * to change the state to DELAY and a sets 2121d7968c29SAlexander V. Chernikov * a timer to expire in DELAY_FIRST_PROBE_TIME 2122d7968c29SAlexander V. Chernikov * seconds to ensure do neighbor unreachability 2123d7968c29SAlexander V. Chernikov * detection on expiration. 2124d7968c29SAlexander V. Chernikov * (RFC 2461 7.3.3) 2125d7968c29SAlexander V. Chernikov */ 2126aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(ln, ND6_LLINFO_DELAY); 2127d7968c29SAlexander V. Chernikov } 2128d7968c29SAlexander V. Chernikov } 2129d7968c29SAlexander V. Chernikov 21301fe201c3SAlexander V. Chernikov int 2131d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m, 2132637670e7SAlexander V. Chernikov struct sockaddr_in6 *dst, struct route *ro) 2133d7968c29SAlexander V. Chernikov { 2134d7968c29SAlexander V. Chernikov int error; 2135d7968c29SAlexander V. Chernikov int ip6len; 2136d7968c29SAlexander V. Chernikov struct ip6_hdr *ip6; 2137d7968c29SAlexander V. Chernikov struct m_tag *mtag; 2138d7968c29SAlexander V. Chernikov 2139d7968c29SAlexander V. Chernikov #ifdef MAC 2140d7968c29SAlexander V. Chernikov mac_netinet6_nd6_send(ifp, m); 2141d7968c29SAlexander V. Chernikov #endif 2142d7968c29SAlexander V. Chernikov 2143d7968c29SAlexander V. Chernikov /* 2144d7968c29SAlexander V. Chernikov * If called from nd6_ns_output() (NS), nd6_na_output() (NA), 2145d7968c29SAlexander V. Chernikov * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA 2146d7968c29SAlexander V. Chernikov * as handled by rtsol and rtadvd), mbufs will be tagged for SeND 2147d7968c29SAlexander V. Chernikov * to be diverted to user space. When re-injected into the kernel, 2148d7968c29SAlexander V. Chernikov * send_output() will directly dispatch them to the outgoing interface. 2149d7968c29SAlexander V. Chernikov */ 2150d7968c29SAlexander V. Chernikov if (send_sendso_input_hook != NULL) { 2151d7968c29SAlexander V. Chernikov mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL); 2152d7968c29SAlexander V. Chernikov if (mtag != NULL) { 2153d7968c29SAlexander V. Chernikov ip6 = mtod(m, struct ip6_hdr *); 2154d7968c29SAlexander V. Chernikov ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 2155d7968c29SAlexander V. Chernikov /* Use the SEND socket */ 2156d7968c29SAlexander V. Chernikov error = send_sendso_input_hook(m, ifp, SND_OUT, 2157d7968c29SAlexander V. Chernikov ip6len); 2158d7968c29SAlexander V. Chernikov /* -1 == no app on SEND socket */ 2159d7968c29SAlexander V. Chernikov if (error == 0 || error != -1) 2160d7968c29SAlexander V. Chernikov return (error); 2161d7968c29SAlexander V. Chernikov } 2162d7968c29SAlexander V. Chernikov } 2163d7968c29SAlexander V. Chernikov 2164d7968c29SAlexander V. Chernikov m_clrprotoflags(m); /* Avoid confusing lower layers. */ 2165d7968c29SAlexander V. Chernikov IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL, 2166d7968c29SAlexander V. Chernikov mtod(m, struct ip6_hdr *)); 2167d7968c29SAlexander V. Chernikov 2168d7968c29SAlexander V. Chernikov if ((ifp->if_flags & IFF_LOOPBACK) == 0) 2169d7968c29SAlexander V. Chernikov origifp = ifp; 2170d7968c29SAlexander V. Chernikov 2171637670e7SAlexander V. Chernikov error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro); 2172d7968c29SAlexander V. Chernikov return (error); 2173d7968c29SAlexander V. Chernikov } 2174d7968c29SAlexander V. Chernikov 2175f6990c4eSAlexander V. Chernikov /* 21764fb3a820SAlexander V. Chernikov * Lookup link headerfor @sa_dst address. Stores found 21774fb3a820SAlexander V. Chernikov * data in @desten buffer. Copy of lle ln_flags can be also 21781fe201c3SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 21791fe201c3SAlexander V. Chernikov * 21801fe201c3SAlexander V. Chernikov * If destination LLE does not exists or lle state modification 21811fe201c3SAlexander V. Chernikov * is required, call "slow" version. 21821fe201c3SAlexander V. Chernikov * 21831fe201c3SAlexander V. Chernikov * Return values: 21841fe201c3SAlexander V. Chernikov * - 0 on success (address copied to buffer). 21851fe201c3SAlexander V. Chernikov * - EWOULDBLOCK (no local error, but address is still unresolved) 21861fe201c3SAlexander V. Chernikov * - other errors (alloc failure, etc) 2187f6990c4eSAlexander V. Chernikov */ 218882cd038dSYoshinobu Inoue int 21891fe201c3SAlexander V. Chernikov nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 21906d768226SGeorge V. Neville-Neil const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags, 21916d768226SGeorge V. Neville-Neil struct llentry **plle) 219282cd038dSYoshinobu Inoue { 2193f6990c4eSAlexander V. Chernikov struct llentry *ln = NULL; 21941fe201c3SAlexander V. Chernikov const struct sockaddr_in6 *dst6; 21951fe201c3SAlexander V. Chernikov 21961fe201c3SAlexander V. Chernikov if (pflags != NULL) 21971fe201c3SAlexander V. Chernikov *pflags = 0; 21981fe201c3SAlexander V. Chernikov 21991fe201c3SAlexander V. Chernikov dst6 = (const struct sockaddr_in6 *)sa_dst; 22006e6b3f7cSQing Li 2201f6990c4eSAlexander V. Chernikov /* discard the packet if IPv6 operation is disabled on the interface */ 2202f6990c4eSAlexander V. Chernikov if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) { 2203f6990c4eSAlexander V. Chernikov m_freem(m); 2204f6990c4eSAlexander V. Chernikov return (ENETDOWN); /* better error? */ 2205f6990c4eSAlexander V. Chernikov } 2206f6990c4eSAlexander V. Chernikov 22071fe201c3SAlexander V. Chernikov if (m != NULL && m->m_flags & M_MCAST) { 22081fe201c3SAlexander V. Chernikov switch (ifp->if_type) { 22091fe201c3SAlexander V. Chernikov case IFT_ETHER: 22101fe201c3SAlexander V. Chernikov case IFT_FDDI: 22111fe201c3SAlexander V. Chernikov case IFT_L2VLAN: 22121fe201c3SAlexander V. Chernikov case IFT_IEEE80211: 22131fe201c3SAlexander V. Chernikov case IFT_BRIDGE: 22141fe201c3SAlexander V. Chernikov case IFT_ISO88025: 22151fe201c3SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr, 22161fe201c3SAlexander V. Chernikov desten); 22171fe201c3SAlexander V. Chernikov return (0); 22181fe201c3SAlexander V. Chernikov default: 22191fe201c3SAlexander V. Chernikov m_freem(m); 22201fe201c3SAlexander V. Chernikov return (EAFNOSUPPORT); 22211fe201c3SAlexander V. Chernikov } 22221fe201c3SAlexander V. Chernikov } 2223f6990c4eSAlexander V. Chernikov 2224f6990c4eSAlexander V. Chernikov IF_AFDATA_RLOCK(ifp); 2225ea17754cSMike Karels ln = nd6_lookup(&dst6->sin6_addr, plle ? LLE_EXCLUSIVE : LLE_UNLOCKED, 2226ea17754cSMike Karels ifp); 222712cb7521SAlexander V. Chernikov if (ln != NULL && (ln->r_flags & RLLE_VALID) != 0) { 222812cb7521SAlexander V. Chernikov /* Entry found, let's copy lle info */ 22294fb3a820SAlexander V. Chernikov bcopy(ln->r_linkdata, desten, ln->r_hdrlen); 22301fe201c3SAlexander V. Chernikov if (pflags != NULL) 223112cb7521SAlexander V. Chernikov *pflags = LLE_VALID | (ln->r_flags & RLLE_IFADDR); 223212cb7521SAlexander V. Chernikov /* Check if we have feedback request from nd6 timer */ 223312cb7521SAlexander V. Chernikov if (ln->r_skip_req != 0) { 223412cb7521SAlexander V. Chernikov LLE_REQ_LOCK(ln); 223512cb7521SAlexander V. Chernikov ln->r_skip_req = 0; /* Notify that entry was used */ 223612cb7521SAlexander V. Chernikov ln->lle_hittime = time_uptime; 223712cb7521SAlexander V. Chernikov LLE_REQ_UNLOCK(ln); 223812cb7521SAlexander V. Chernikov } 2239ea17754cSMike Karels if (plle) { 2240ea17754cSMike Karels LLE_ADDREF(ln); 2241ea17754cSMike Karels *plle = ln; 2242ea17754cSMike Karels LLE_WUNLOCK(ln); 2243ea17754cSMike Karels } 224412cb7521SAlexander V. Chernikov IF_AFDATA_RUNLOCK(ifp); 22451fe201c3SAlexander V. Chernikov return (0); 2246ea17754cSMike Karels } else if (plle && ln) 2247ea17754cSMike Karels LLE_WUNLOCK(ln); 224812cb7521SAlexander V. Chernikov IF_AFDATA_RUNLOCK(ifp); 224912cb7521SAlexander V. Chernikov 22506d768226SGeorge V. Neville-Neil return (nd6_resolve_slow(ifp, 0, m, dst6, desten, pflags, plle)); 225112cb7521SAlexander V. Chernikov } 22526e6b3f7cSQing Li 22536e6b3f7cSQing Li 22546e6b3f7cSQing Li /* 22551fe201c3SAlexander V. Chernikov * Do L2 address resolution for @sa_dst address. Stores found 22561fe201c3SAlexander V. Chernikov * address in @desten buffer. Copy of lle ln_flags can be also 22571fe201c3SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 22586e6b3f7cSQing Li * 22591fe201c3SAlexander V. Chernikov * Heavy version. 22601fe201c3SAlexander V. Chernikov * Function assume that destination LLE does not exist, 2261f506d933SAlexander V. Chernikov * is invalid or stale, so LLE_EXCLUSIVE lock needs to be acquired. 2262c0b8aeaeSAlexander V. Chernikov * 2263c0b8aeaeSAlexander V. Chernikov * Set noinline to be dtrace-friendly 22646e6b3f7cSQing Li */ 2265c0b8aeaeSAlexander V. Chernikov static __noinline int 22664fb3a820SAlexander V. Chernikov nd6_resolve_slow(struct ifnet *ifp, int flags, struct mbuf *m, 22676d768226SGeorge V. Neville-Neil const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags, 22686d768226SGeorge V. Neville-Neil struct llentry **plle) 22696e6b3f7cSQing Li { 22705a255516SAlexander V. Chernikov struct llentry *lle = NULL, *lle_tmp; 2271aa5f023eSAlexander V. Chernikov struct in6_addr *psrc, src; 22724fb3a820SAlexander V. Chernikov int send_ns, ll_len; 22734fb3a820SAlexander V. Chernikov char *lladdr; 227482cd038dSYoshinobu Inoue 227582cd038dSYoshinobu Inoue /* 227682cd038dSYoshinobu Inoue * Address resolution or Neighbor Unreachability Detection 227782cd038dSYoshinobu Inoue * for the next hop. 227882cd038dSYoshinobu Inoue * At this point, the destination of the packet must be a unicast 227982cd038dSYoshinobu Inoue * or an anycast address(i.e. not a multicast). 228082cd038dSYoshinobu Inoue */ 2281f6990c4eSAlexander V. Chernikov if (lle == NULL) { 2282c445d252SAdrian Chadd IF_AFDATA_RLOCK(ifp); 2283f506d933SAlexander V. Chernikov lle = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp); 2284c445d252SAdrian Chadd IF_AFDATA_RUNLOCK(ifp); 2285f6990c4eSAlexander V. Chernikov if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp)) { 2286686cdd19SJun-ichiro itojun Hagino /* 2287686cdd19SJun-ichiro itojun Hagino * Since nd6_is_addr_neighbor() internally calls nd6_lookup(), 2288686cdd19SJun-ichiro itojun Hagino * the condition below is not very efficient. But we believe 2289686cdd19SJun-ichiro itojun Hagino * it is tolerable, because this should be a rare case. 2290686cdd19SJun-ichiro itojun Hagino */ 22915a255516SAlexander V. Chernikov lle = nd6_alloc(&dst->sin6_addr, 0, ifp); 2292f6990c4eSAlexander V. Chernikov if (lle == NULL) { 22931d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 2294686cdd19SJun-ichiro itojun Hagino log(LOG_DEBUG, 2295686cdd19SJun-ichiro itojun Hagino "nd6_output: can't allocate llinfo for %s " 2296bbd8aebaSQing Li "(ln=%p)\n", 2297f6990c4eSAlexander V. Chernikov ip6_sprintf(ip6buf, &dst->sin6_addr), lle); 22989dffa6a3SAlexander V. Chernikov m_freem(m); 22999dffa6a3SAlexander V. Chernikov return (ENOBUFS); 230082cd038dSYoshinobu Inoue } 23015a255516SAlexander V. Chernikov 23025a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 23035a255516SAlexander V. Chernikov LLE_WLOCK(lle); 23045a255516SAlexander V. Chernikov /* Prefer any existing entry over newly-created one */ 2305f506d933SAlexander V. Chernikov lle_tmp = nd6_lookup(&dst->sin6_addr, LLE_EXCLUSIVE, ifp); 23065a255516SAlexander V. Chernikov if (lle_tmp == NULL) 23075a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), lle); 23085a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 23095a255516SAlexander V. Chernikov if (lle_tmp != NULL) { 23105a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), lle); 23115a255516SAlexander V. Chernikov lle = lle_tmp; 23125a255516SAlexander V. Chernikov lle_tmp = NULL; 23135a255516SAlexander V. Chernikov } 23145a255516SAlexander V. Chernikov } 23155a255516SAlexander V. Chernikov } 23165a255516SAlexander V. Chernikov if (lle == NULL) { 23171fe201c3SAlexander V. Chernikov if (!(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) { 23185a255516SAlexander V. Chernikov m_freem(m); 23195a255516SAlexander V. Chernikov return (ENOBUFS); 23205a255516SAlexander V. Chernikov } 23211fe201c3SAlexander V. Chernikov 23221fe201c3SAlexander V. Chernikov if (m != NULL) 23231fe201c3SAlexander V. Chernikov m_freem(m); 23241fe201c3SAlexander V. Chernikov return (ENOBUFS); 2325686cdd19SJun-ichiro itojun Hagino } 2326686cdd19SJun-ichiro itojun Hagino 2327f6990c4eSAlexander V. Chernikov LLE_WLOCK_ASSERT(lle); 2328f6990c4eSAlexander V. Chernikov 232982cd038dSYoshinobu Inoue /* 233082cd038dSYoshinobu Inoue * The first time we send a packet to a neighbor whose entry is 233182cd038dSYoshinobu Inoue * STALE, we have to change the state to DELAY and a sets a timer to 233282cd038dSYoshinobu Inoue * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 233382cd038dSYoshinobu Inoue * neighbor unreachability detection on expiration. 233482cd038dSYoshinobu Inoue * (RFC 2461 7.3.3) 233582cd038dSYoshinobu Inoue */ 2336aa5f023eSAlexander V. Chernikov if (lle->ln_state == ND6_LLINFO_STALE) 2337aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(lle, ND6_LLINFO_DELAY); 233882cd038dSYoshinobu Inoue 233982cd038dSYoshinobu Inoue /* 234082cd038dSYoshinobu Inoue * If the neighbor cache entry has a state other than INCOMPLETE 234188ff5695SSUZUKI Shinsuke * (i.e. its link-layer address is already resolved), just 234282cd038dSYoshinobu Inoue * send the packet. 234382cd038dSYoshinobu Inoue */ 23441fe201c3SAlexander V. Chernikov if (lle->ln_state > ND6_LLINFO_INCOMPLETE) { 23454fb3a820SAlexander V. Chernikov if (flags & LLE_ADDRONLY) { 23464fb3a820SAlexander V. Chernikov lladdr = lle->ll_addr; 23474fb3a820SAlexander V. Chernikov ll_len = ifp->if_addrlen; 23484fb3a820SAlexander V. Chernikov } else { 23494fb3a820SAlexander V. Chernikov lladdr = lle->r_linkdata; 23504fb3a820SAlexander V. Chernikov ll_len = lle->r_hdrlen; 23514fb3a820SAlexander V. Chernikov } 23524fb3a820SAlexander V. Chernikov bcopy(lladdr, desten, ll_len); 23531fe201c3SAlexander V. Chernikov if (pflags != NULL) 23541fe201c3SAlexander V. Chernikov *pflags = lle->la_flags; 23556d768226SGeorge V. Neville-Neil if (plle) { 23566d768226SGeorge V. Neville-Neil LLE_ADDREF(lle); 23576d768226SGeorge V. Neville-Neil *plle = lle; 23586d768226SGeorge V. Neville-Neil } 23591fe201c3SAlexander V. Chernikov LLE_WUNLOCK(lle); 23601fe201c3SAlexander V. Chernikov return (0); 23611fe201c3SAlexander V. Chernikov } 236282cd038dSYoshinobu Inoue 236382cd038dSYoshinobu Inoue /* 236482cd038dSYoshinobu Inoue * There is a neighbor cache entry, but no ethernet address 2365743eee66SSUZUKI Shinsuke * response yet. Append this latest packet to the end of the 2366b0ab3725SLuiz Otavio O Souza * packet queue in the mbuf. When it exceeds nd6_maxqueuelen, 2367743eee66SSUZUKI Shinsuke * the oldest packet in the queue will be removed. 236882cd038dSYoshinobu Inoue */ 23696e6b3f7cSQing Li 2370f6990c4eSAlexander V. Chernikov if (lle->la_hold != NULL) { 2371743eee66SSUZUKI Shinsuke struct mbuf *m_hold; 2372743eee66SSUZUKI Shinsuke int i; 2373743eee66SSUZUKI Shinsuke 2374743eee66SSUZUKI Shinsuke i = 0; 2375f6990c4eSAlexander V. Chernikov for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){ 2376743eee66SSUZUKI Shinsuke i++; 2377743eee66SSUZUKI Shinsuke if (m_hold->m_nextpkt == NULL) { 2378743eee66SSUZUKI Shinsuke m_hold->m_nextpkt = m; 2379743eee66SSUZUKI Shinsuke break; 238082cd038dSYoshinobu Inoue } 238182cd038dSYoshinobu Inoue } 2382603724d3SBjoern A. Zeeb while (i >= V_nd6_maxqueuelen) { 2383f6990c4eSAlexander V. Chernikov m_hold = lle->la_hold; 2384f6990c4eSAlexander V. Chernikov lle->la_hold = lle->la_hold->m_nextpkt; 238531d4137bSSUZUKI Shinsuke m_freem(m_hold); 2386743eee66SSUZUKI Shinsuke i--; 2387743eee66SSUZUKI Shinsuke } 2388743eee66SSUZUKI Shinsuke } else { 2389f6990c4eSAlexander V. Chernikov lle->la_hold = m; 23906e6b3f7cSQing Li } 2391743eee66SSUZUKI Shinsuke 2392743eee66SSUZUKI Shinsuke /* 2393743eee66SSUZUKI Shinsuke * If there has been no NS for the neighbor after entering the 2394743eee66SSUZUKI Shinsuke * INCOMPLETE state, send the first solicitation. 2395aa5f023eSAlexander V. Chernikov * Note that for newly-created lle la_asked will be 0, 2396aa5f023eSAlexander V. Chernikov * so we will transition from ND6_LLINFO_NOSTATE to 2397aa5f023eSAlexander V. Chernikov * ND6_LLINFO_INCOMPLETE state here. 2398743eee66SSUZUKI Shinsuke */ 2399aa5f023eSAlexander V. Chernikov psrc = NULL; 2400aa5f023eSAlexander V. Chernikov send_ns = 0; 2401aa5f023eSAlexander V. Chernikov if (lle->la_asked == 0) { 2402f6990c4eSAlexander V. Chernikov lle->la_asked++; 2403aa5f023eSAlexander V. Chernikov send_ns = 1; 240426deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(lle, &src); 2405aa5f023eSAlexander V. Chernikov 2406aa5f023eSAlexander V. Chernikov nd6_llinfo_setstate(lle, ND6_LLINFO_INCOMPLETE); 2407743eee66SSUZUKI Shinsuke } 2408aa5f023eSAlexander V. Chernikov LLE_WUNLOCK(lle); 2409aa5f023eSAlexander V. Chernikov if (send_ns != 0) 2410aa5f023eSAlexander V. Chernikov nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL); 2411e6950476SBjoern A. Zeeb 24121fe201c3SAlexander V. Chernikov return (EWOULDBLOCK); 241382cd038dSYoshinobu Inoue } 241482cd038dSYoshinobu Inoue 24154fb3a820SAlexander V. Chernikov /* 24164fb3a820SAlexander V. Chernikov * Do L2 address resolution for @sa_dst address. Stores found 24174fb3a820SAlexander V. Chernikov * address in @desten buffer. Copy of lle ln_flags can be also 24184fb3a820SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 24194fb3a820SAlexander V. Chernikov * 24204fb3a820SAlexander V. Chernikov * Return values: 24214fb3a820SAlexander V. Chernikov * - 0 on success (address copied to buffer). 24224fb3a820SAlexander V. Chernikov * - EWOULDBLOCK (no local error, but address is still unresolved) 24234fb3a820SAlexander V. Chernikov * - other errors (alloc failure, etc) 24244fb3a820SAlexander V. Chernikov */ 24254fb3a820SAlexander V. Chernikov int 24264fb3a820SAlexander V. Chernikov nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst, 24274fb3a820SAlexander V. Chernikov char *desten, uint32_t *pflags) 24284fb3a820SAlexander V. Chernikov { 24294fb3a820SAlexander V. Chernikov int error; 24304fb3a820SAlexander V. Chernikov 24314fb3a820SAlexander V. Chernikov flags |= LLE_ADDRONLY; 24324fb3a820SAlexander V. Chernikov error = nd6_resolve_slow(ifp, flags, NULL, 24336d768226SGeorge V. Neville-Neil (const struct sockaddr_in6 *)dst, desten, pflags, NULL); 24344fb3a820SAlexander V. Chernikov return (error); 24354fb3a820SAlexander V. Chernikov } 24366e6b3f7cSQing Li 24376e6b3f7cSQing Li int 2438d7968c29SAlexander V. Chernikov nd6_flush_holdchain(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *chain, 24399c9bde01SAlexander V. Chernikov struct sockaddr_in6 *dst) 24406e6b3f7cSQing Li { 24416e6b3f7cSQing Li struct mbuf *m, *m_head; 24426e6b3f7cSQing Li struct ifnet *outifp; 24436e6b3f7cSQing Li int error = 0; 24446e6b3f7cSQing Li 24456e6b3f7cSQing Li m_head = chain; 24466e6b3f7cSQing Li if ((ifp->if_flags & IFF_LOOPBACK) != 0) 24476e6b3f7cSQing Li outifp = origifp; 24486e6b3f7cSQing Li else 24496e6b3f7cSQing Li outifp = ifp; 24506e6b3f7cSQing Li 24516e6b3f7cSQing Li while (m_head) { 24526e6b3f7cSQing Li m = m_head; 24536e6b3f7cSQing Li m_head = m_head->m_nextpkt; 2454637670e7SAlexander V. Chernikov error = nd6_output_ifp(ifp, origifp, m, dst, NULL); 24556e6b3f7cSQing Li } 24566e6b3f7cSQing Li 24576e6b3f7cSQing Li /* 24586e6b3f7cSQing Li * XXX 24591fe201c3SAlexander V. Chernikov * note that intermediate errors are blindly ignored 24606e6b3f7cSQing Li */ 24616e6b3f7cSQing Li return (error); 24626e6b3f7cSQing Li } 24636e6b3f7cSQing Li 24641fe201c3SAlexander V. Chernikov static int 24651272577eSXin LI nd6_need_cache(struct ifnet *ifp) 246633841545SHajimu UMEMOTO { 246733841545SHajimu UMEMOTO /* 246833841545SHajimu UMEMOTO * XXX: we currently do not make neighbor cache on any interface 246933841545SHajimu UMEMOTO * other than ARCnet, Ethernet, FDDI and GIF. 247033841545SHajimu UMEMOTO * 247133841545SHajimu UMEMOTO * RFC2893 says: 247233841545SHajimu UMEMOTO * - unidirectional tunnels needs no ND 247333841545SHajimu UMEMOTO */ 247433841545SHajimu UMEMOTO switch (ifp->if_type) { 247533841545SHajimu UMEMOTO case IFT_ARCNET: 247633841545SHajimu UMEMOTO case IFT_ETHER: 247733841545SHajimu UMEMOTO case IFT_FDDI: 247833841545SHajimu UMEMOTO case IFT_IEEE1394: 247905b6760dSMunechika SUMIKAWA case IFT_L2VLAN: 248033841545SHajimu UMEMOTO case IFT_IEEE80211: 2481e4cd31ddSJeff Roberson case IFT_INFINIBAND: 248259280079SAndrew Thompson case IFT_BRIDGE: 2483c57086ceSHajimu UMEMOTO case IFT_PROPVIRTUAL: 248433841545SHajimu UMEMOTO return (1); 248533841545SHajimu UMEMOTO default: 248633841545SHajimu UMEMOTO return (0); 248733841545SHajimu UMEMOTO } 248833841545SHajimu UMEMOTO } 248933841545SHajimu UMEMOTO 24906e6b3f7cSQing Li /* 2491f6b84910SAlexander V. Chernikov * Add pernament ND6 link-layer record for given 2492f6b84910SAlexander V. Chernikov * interface address. 2493f6b84910SAlexander V. Chernikov * 2494f6b84910SAlexander V. Chernikov * Very similar to IPv4 arp_ifinit(), but: 2495f6b84910SAlexander V. Chernikov * 1) IPv6 DAD is performed in different place 2496f6b84910SAlexander V. Chernikov * 2) It is called by IPv6 protocol stack in contrast to 2497f6b84910SAlexander V. Chernikov * arp_ifinit() which is typically called in SIOCSIFADDR 2498f6b84910SAlexander V. Chernikov * driver ioctl handler. 2499f6b84910SAlexander V. Chernikov * 2500f6b84910SAlexander V. Chernikov */ 2501f6b84910SAlexander V. Chernikov int 2502f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia) 2503f6b84910SAlexander V. Chernikov { 2504f6b84910SAlexander V. Chernikov struct ifnet *ifp; 25055a255516SAlexander V. Chernikov struct llentry *ln, *ln_tmp; 25065a255516SAlexander V. Chernikov struct sockaddr *dst; 2507f6b84910SAlexander V. Chernikov 2508f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2509af6209a1SAndrey V. Elsukov if (nd6_need_cache(ifp) == 0) 2510af6209a1SAndrey V. Elsukov return (0); 25115a255516SAlexander V. Chernikov 2512f6b84910SAlexander V. Chernikov ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 25135a255516SAlexander V. Chernikov dst = (struct sockaddr *)&ia->ia_addr; 25145a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst); 25155a255516SAlexander V. Chernikov if (ln == NULL) 25165a255516SAlexander V. Chernikov return (ENOBUFS); 25175a255516SAlexander V. Chernikov 25185a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 25195a255516SAlexander V. Chernikov LLE_WLOCK(ln); 25205a255516SAlexander V. Chernikov /* Unlink any entry if exists */ 25215a255516SAlexander V. Chernikov ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst); 25225a255516SAlexander V. Chernikov if (ln_tmp != NULL) 25235a255516SAlexander V. Chernikov lltable_unlink_entry(LLTABLE6(ifp), ln_tmp); 25245a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 25255a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 25265a255516SAlexander V. Chernikov 25275a255516SAlexander V. Chernikov if (ln_tmp != NULL) 25285a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED); 25295a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 25305a255516SAlexander V. Chernikov 25315a255516SAlexander V. Chernikov LLE_WUNLOCK(ln); 25325a255516SAlexander V. Chernikov if (ln_tmp != NULL) 25335a255516SAlexander V. Chernikov llentry_free(ln_tmp); 25345a255516SAlexander V. Chernikov 25355a255516SAlexander V. Chernikov return (0); 2536f6b84910SAlexander V. Chernikov } 2537f6b84910SAlexander V. Chernikov 2538f6b84910SAlexander V. Chernikov /* 25393e7a2321SAlexander V. Chernikov * Removes either all lle entries for given @ia, or lle 25403e7a2321SAlexander V. Chernikov * corresponding to @ia address. 2541f6b84910SAlexander V. Chernikov */ 2542f6b84910SAlexander V. Chernikov void 25433e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all) 2544f6b84910SAlexander V. Chernikov { 2545f6b84910SAlexander V. Chernikov struct sockaddr_in6 mask, addr; 25463e7a2321SAlexander V. Chernikov struct sockaddr *saddr, *smask; 2547f6b84910SAlexander V. Chernikov struct ifnet *ifp; 2548f6b84910SAlexander V. Chernikov 2549f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2550f6b84910SAlexander V. Chernikov memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 2551f6b84910SAlexander V. Chernikov memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 25523e7a2321SAlexander V. Chernikov saddr = (struct sockaddr *)&addr; 25533e7a2321SAlexander V. Chernikov smask = (struct sockaddr *)&mask; 25543e7a2321SAlexander V. Chernikov 25553e7a2321SAlexander V. Chernikov if (all != 0) 25563e7a2321SAlexander V. Chernikov lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC); 25573e7a2321SAlexander V. Chernikov else 25583e7a2321SAlexander V. Chernikov lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr); 2559f6b84910SAlexander V. Chernikov } 2560f6b84910SAlexander V. Chernikov 256131d4137bSSUZUKI Shinsuke static void 25626e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln) 256331d4137bSSUZUKI Shinsuke { 256431d4137bSSUZUKI Shinsuke struct mbuf *m_hold, *m_hold_next; 256531d4137bSSUZUKI Shinsuke 25666e6b3f7cSQing Li for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) { 256731d4137bSSUZUKI Shinsuke m_hold_next = m_hold->m_nextpkt; 256831d4137bSSUZUKI Shinsuke m_freem(m_hold); 256931d4137bSSUZUKI Shinsuke } 257031d4137bSSUZUKI Shinsuke 25716e6b3f7cSQing Li ln->la_hold = NULL; 257231d4137bSSUZUKI Shinsuke } 257331d4137bSSUZUKI Shinsuke 257433841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS); 257533841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS); 257665fdf521SMark Johnston 257733841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6); 257865fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist, 257965fdf521SMark Johnston CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, 258065fdf521SMark Johnston NULL, 0, nd6_sysctl_drlist, "S,in6_defrouter", 258165fdf521SMark Johnston "NDP default router list"); 258265fdf521SMark Johnston SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist, 258365fdf521SMark Johnston CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, 258465fdf521SMark Johnston NULL, 0, nd6_sysctl_prlist, "S,in6_prefix", 258565fdf521SMark Johnston "NDP prefix list"); 25866df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen, 2587d6e82913SSteven Hartland CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, ""); 25886df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer, 2589d6e82913SSteven Hartland CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), ""); 259033841545SHajimu UMEMOTO 259133841545SHajimu UMEMOTO static int 259233841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS) 259333841545SHajimu UMEMOTO { 25947195094cSMarius Strobl struct in6_defrouter d; 259533841545SHajimu UMEMOTO struct nd_defrouter *dr; 25967195094cSMarius Strobl int error; 259733841545SHajimu UMEMOTO 25984de485feSMark Johnston if (req->newptr != NULL) 25997195094cSMarius Strobl return (EPERM); 260033841545SHajimu UMEMOTO 26014de485feSMark Johnston error = sysctl_wire_old_buffer(req, 0); 26024de485feSMark Johnston if (error != 0) 26034de485feSMark Johnston return (error); 26044de485feSMark Johnston 26057195094cSMarius Strobl bzero(&d, sizeof(d)); 26067195094cSMarius Strobl d.rtaddr.sin6_family = AF_INET6; 26077195094cSMarius Strobl d.rtaddr.sin6_len = sizeof(d.rtaddr); 26087195094cSMarius Strobl 26094de485feSMark Johnston ND6_RLOCK(); 26103b0b2840SJohn Baldwin TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) { 26117195094cSMarius Strobl d.rtaddr.sin6_addr = dr->rtaddr; 26127195094cSMarius Strobl error = sa6_recoverscope(&d.rtaddr); 2613edbb8b46SPeter Wemm if (error != 0) 26144de485feSMark Johnston break; 261501869be5SMark Johnston d.flags = dr->raflags; 26167195094cSMarius Strobl d.rtlifetime = dr->rtlifetime; 2617ffa0165aSHiroki Sato d.expire = dr->expire + (time_second - time_uptime); 26187195094cSMarius Strobl d.if_index = dr->ifp->if_index; 26197195094cSMarius Strobl error = SYSCTL_OUT(req, &d, sizeof(d)); 26207195094cSMarius Strobl if (error != 0) 26214de485feSMark Johnston break; 262233841545SHajimu UMEMOTO } 26234de485feSMark Johnston ND6_RUNLOCK(); 26244de485feSMark Johnston return (error); 26257195094cSMarius Strobl } 262633841545SHajimu UMEMOTO 262733841545SHajimu UMEMOTO static int 262833841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS) 262933841545SHajimu UMEMOTO { 26307195094cSMarius Strobl struct in6_prefix p; 26317195094cSMarius Strobl struct sockaddr_in6 s6; 263233841545SHajimu UMEMOTO struct nd_prefix *pr; 26337195094cSMarius Strobl struct nd_pfxrouter *pfr; 26347195094cSMarius Strobl time_t maxexpire; 26357195094cSMarius Strobl int error; 26361d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 263733841545SHajimu UMEMOTO 263833841545SHajimu UMEMOTO if (req->newptr) 26397195094cSMarius Strobl return (EPERM); 264033841545SHajimu UMEMOTO 2641cc51be7bSMark Johnston error = sysctl_wire_old_buffer(req, 0); 2642cc51be7bSMark Johnston if (error != 0) 2643cc51be7bSMark Johnston return (error); 2644cc51be7bSMark Johnston 26457195094cSMarius Strobl bzero(&p, sizeof(p)); 26467195094cSMarius Strobl p.origin = PR_ORIG_RA; 26477195094cSMarius Strobl bzero(&s6, sizeof(s6)); 26487195094cSMarius Strobl s6.sin6_family = AF_INET6; 26497195094cSMarius Strobl s6.sin6_len = sizeof(s6); 26507195094cSMarius Strobl 2651cc51be7bSMark Johnston ND6_RLOCK(); 26523b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 26537195094cSMarius Strobl p.prefix = pr->ndpr_prefix; 26547195094cSMarius Strobl if (sa6_recoverscope(&p.prefix)) { 26557195094cSMarius Strobl log(LOG_ERR, "scope error in prefix list (%s)\n", 26567195094cSMarius Strobl ip6_sprintf(ip6buf, &p.prefix.sin6_addr)); 2657a1f7e5f8SHajimu UMEMOTO /* XXX: press on... */ 2658a1f7e5f8SHajimu UMEMOTO } 26597195094cSMarius Strobl p.raflags = pr->ndpr_raf; 26607195094cSMarius Strobl p.prefixlen = pr->ndpr_plen; 26617195094cSMarius Strobl p.vltime = pr->ndpr_vltime; 26627195094cSMarius Strobl p.pltime = pr->ndpr_pltime; 26637195094cSMarius Strobl p.if_index = pr->ndpr_ifp->if_index; 2664743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME) 26657195094cSMarius Strobl p.expire = 0; 2666743eee66SSUZUKI Shinsuke else { 2667743eee66SSUZUKI Shinsuke /* XXX: we assume time_t is signed. */ 2668743eee66SSUZUKI Shinsuke maxexpire = (-1) & 26697195094cSMarius Strobl ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 26707195094cSMarius Strobl if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate) 26717195094cSMarius Strobl p.expire = pr->ndpr_lastupdate + 2672ffa0165aSHiroki Sato pr->ndpr_vltime + 2673ffa0165aSHiroki Sato (time_second - time_uptime); 26747195094cSMarius Strobl else 26757195094cSMarius Strobl p.expire = maxexpire; 2676743eee66SSUZUKI Shinsuke } 2677*0bbf244eSMark Johnston p.refcnt = pr->ndpr_addrcnt; 26787195094cSMarius Strobl p.flags = pr->ndpr_stateflags; 26797195094cSMarius Strobl p.advrtrs = 0; 26807195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) 26817195094cSMarius Strobl p.advrtrs++; 26827195094cSMarius Strobl error = SYSCTL_OUT(req, &p, sizeof(p)); 26837195094cSMarius Strobl if (error != 0) 2684cc51be7bSMark Johnston break; 26857195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) { 26867195094cSMarius Strobl s6.sin6_addr = pfr->router->rtaddr; 26877195094cSMarius Strobl if (sa6_recoverscope(&s6)) 26887195094cSMarius Strobl log(LOG_ERR, 26897195094cSMarius Strobl "scope error in prefix list (%s)\n", 26907195094cSMarius Strobl ip6_sprintf(ip6buf, &pfr->router->rtaddr)); 26917195094cSMarius Strobl error = SYSCTL_OUT(req, &s6, sizeof(s6)); 26927195094cSMarius Strobl if (error != 0) 2693cc51be7bSMark Johnston break; 2694cc51be7bSMark Johnston } 2695cc51be7bSMark Johnston } 2696cc51be7bSMark Johnston ND6_RUNLOCK(); 26977195094cSMarius Strobl return (error); 26987195094cSMarius Strobl } 2699