1caf43b02SWarner Losh /*- 282cd038dSYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 382cd038dSYoshinobu Inoue * All rights reserved. 482cd038dSYoshinobu Inoue * 582cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 682cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 782cd038dSYoshinobu Inoue * are met: 882cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 982cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1082cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1182cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1282cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1382cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1482cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1582cd038dSYoshinobu Inoue * without specific prior written permission. 1682cd038dSYoshinobu Inoue * 1782cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1882cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1982cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2082cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2182cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2282cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2382cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2482cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2582cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2682cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2782cd038dSYoshinobu Inoue * SUCH DAMAGE. 28b48287a3SDavid E. O'Brien * 29b48287a3SDavid E. O'Brien * $KAME: nd6.c,v 1.144 2001/05/24 07:44:00 itojun Exp $ 3082cd038dSYoshinobu Inoue */ 3182cd038dSYoshinobu Inoue 32b48287a3SDavid E. O'Brien #include <sys/cdefs.h> 33b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$"); 34b48287a3SDavid E. O'Brien 35686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 36686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 37686cdd19SJun-ichiro itojun Hagino 3882cd038dSYoshinobu Inoue #include <sys/param.h> 3982cd038dSYoshinobu Inoue #include <sys/systm.h> 4033841545SHajimu UMEMOTO #include <sys/callout.h> 4182cd038dSYoshinobu Inoue #include <sys/malloc.h> 4282cd038dSYoshinobu Inoue #include <sys/mbuf.h> 4382cd038dSYoshinobu Inoue #include <sys/socket.h> 4482cd038dSYoshinobu Inoue #include <sys/sockio.h> 4582cd038dSYoshinobu Inoue #include <sys/time.h> 4682cd038dSYoshinobu Inoue #include <sys/kernel.h> 47686cdd19SJun-ichiro itojun Hagino #include <sys/protosw.h> 4882cd038dSYoshinobu Inoue #include <sys/errno.h> 4982cd038dSYoshinobu Inoue #include <sys/syslog.h> 506e6b3f7cSQing Li #include <sys/lock.h> 516e6b3f7cSQing Li #include <sys/rwlock.h> 5282cd038dSYoshinobu Inoue #include <sys/queue.h> 5357f60867SMark Johnston #include <sys/sdt.h> 5433841545SHajimu UMEMOTO #include <sys/sysctl.h> 5582cd038dSYoshinobu Inoue 5682cd038dSYoshinobu Inoue #include <net/if.h> 5776039bc8SGleb Smirnoff #include <net/if_var.h> 5831b3783cSHajimu UMEMOTO #include <net/if_arc.h> 5982cd038dSYoshinobu Inoue #include <net/if_dl.h> 6082cd038dSYoshinobu Inoue #include <net/if_types.h> 612049fdeeSMatthew N. Dodd #include <net/iso88025.h> 628e5fd461SMatthew N. Dodd #include <net/fddi.h> 6382cd038dSYoshinobu Inoue #include <net/route.h> 644b79449eSBjoern A. Zeeb #include <net/vnet.h> 6582cd038dSYoshinobu Inoue 6682cd038dSYoshinobu Inoue #include <netinet/in.h> 6757f60867SMark Johnston #include <netinet/in_kdtrace.h> 686e6b3f7cSQing Li #include <net/if_llatbl.h> 6982cd038dSYoshinobu Inoue #include <netinet/if_ether.h> 7082cd038dSYoshinobu Inoue #include <netinet6/in6_var.h> 71686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 7282cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h> 73a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 7482cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 75a283298cSHiroki Sato #include <netinet6/in6_ifattach.h> 76686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 771db8d1f8SAna Kukec #include <netinet6/send.h> 7882cd038dSYoshinobu Inoue 79743eee66SSUZUKI Shinsuke #include <sys/limits.h> 80743eee66SSUZUKI Shinsuke 81aed55708SRobert Watson #include <security/mac/mac_framework.h> 82aed55708SRobert Watson 8382cd038dSYoshinobu Inoue #define ND6_SLOWTIMER_INTERVAL (60 * 60) /* 1 hour */ 8482cd038dSYoshinobu Inoue #define ND6_RECALC_REACHTM_INTERVAL (60 * 120) /* 2 hours */ 8582cd038dSYoshinobu Inoue 8647e8d432SGleb Smirnoff #define SIN6(s) ((const struct sockaddr_in6 *)(s)) 8782cd038dSYoshinobu Inoue 8882cea7e6SBjoern A. Zeeb /* timer values */ 8982cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_prune) = 1; /* walk list every 1 seconds */ 9082cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_delay) = 5; /* delay first probe time 5 second */ 9182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_umaxtries) = 3; /* maximum unicast query */ 9282cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_mmaxtries) = 3; /* maximum multicast query */ 9382cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_useloopback) = 1; /* use loopback interface for 9482cea7e6SBjoern A. Zeeb * local traffic */ 9582cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_gctimer) = (60 * 60 * 24); /* 1 day: garbage 9682cea7e6SBjoern A. Zeeb * collection timer */ 97686cdd19SJun-ichiro itojun Hagino 98686cdd19SJun-ichiro itojun Hagino /* preventing too many loops in ND option parsing */ 993e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxndopt) = 10; /* max # of ND options allowed */ 10082cea7e6SBjoern A. Zeeb 10182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper 10282cea7e6SBjoern A. Zeeb * layer hints */ 1033e288e62SDimitry Andric static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved 10482cea7e6SBjoern A. Zeeb * ND entries */ 1051e77c105SRobert Watson #define V_nd6_maxndopt VNET(nd6_maxndopt) 1061e77c105SRobert Watson #define V_nd6_maxqueuelen VNET(nd6_maxqueuelen) 107686cdd19SJun-ichiro itojun Hagino 10882cea7e6SBjoern A. Zeeb #ifdef ND6_DEBUG 10982cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 1; 11082cea7e6SBjoern A. Zeeb #else 11182cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_debug) = 0; 11282cea7e6SBjoern A. Zeeb #endif 11333841545SHajimu UMEMOTO 11430aee131SAndrey V. Elsukov static eventhandler_tag lle_event_eh; 11530aee131SAndrey V. Elsukov 11682cd038dSYoshinobu Inoue /* for debugging? */ 1176e6b3f7cSQing Li #if 0 11882cd038dSYoshinobu Inoue static int nd6_inuse, nd6_allocated; 1196e6b3f7cSQing Li #endif 12082cd038dSYoshinobu Inoue 121eddfbb76SRobert Watson VNET_DEFINE(struct nd_drhead, nd_defrouter); 122eddfbb76SRobert Watson VNET_DEFINE(struct nd_prhead, nd_prefix); 12382cd038dSYoshinobu Inoue 12482cea7e6SBjoern A. Zeeb VNET_DEFINE(int, nd6_recalc_reachtm_interval) = ND6_RECALC_REACHTM_INTERVAL; 1251e77c105SRobert Watson #define V_nd6_recalc_reachtm_interval VNET(nd6_recalc_reachtm_interval) 12644e33a07SMarko Zec 1271db8d1f8SAna Kukec int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int); 1281db8d1f8SAna Kukec 129f0316e1aSAlexander V. Chernikov static int nd6_is_new_addr_neighbor(const struct sockaddr_in6 *, 1306f56329aSXin LI struct ifnet *); 1319233d8f3SDavid E. O'Brien static void nd6_setmtu0(struct ifnet *, struct nd_ifinfo *); 1329233d8f3SDavid E. O'Brien static void nd6_slowtimo(void *); 1339233d8f3SDavid E. O'Brien static int regen_tmpaddr(struct in6_ifaddr *); 134d3cdb716SAlexander V. Chernikov static void nd6_free(struct llentry *, int); 13517a03656SEric van Gyzen static void nd6_free_redirect(const struct llentry *); 1369233d8f3SDavid E. O'Brien static void nd6_llinfo_timer(void *); 1376e6b3f7cSQing Li static void clear_llinfo_pqueue(struct llentry *); 138f6b84910SAlexander V. Chernikov static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 1391fe201c3SAlexander V. Chernikov static int nd6_resolve_slow(struct ifnet *, struct mbuf *, 1401fe201c3SAlexander V. Chernikov const struct sockaddr_in6 *, u_char *, uint32_t *); 1411fe201c3SAlexander V. Chernikov static int nd6_need_cache(struct ifnet *); 1421fe201c3SAlexander V. Chernikov 14333841545SHajimu UMEMOTO 1443e288e62SDimitry Andric static VNET_DEFINE(struct callout, nd6_slowtimo_ch); 1451e77c105SRobert Watson #define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch) 146eddfbb76SRobert Watson 147eddfbb76SRobert Watson VNET_DEFINE(struct callout, 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) 19030aee131SAndrey V. Elsukov 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 19882cd038dSYoshinobu Inoue void 1991272577eSXin LI nd6_init(void) 20082cd038dSYoshinobu Inoue { 20182cd038dSYoshinobu Inoue 20244e33a07SMarko Zec LIST_INIT(&V_nd_prefix); 20344e33a07SMarko Zec 204686cdd19SJun-ichiro itojun Hagino /* initialization of the default router list */ 205603724d3SBjoern A. Zeeb TAILQ_INIT(&V_nd_defrouter); 20682cea7e6SBjoern A. Zeeb 20782cd038dSYoshinobu Inoue /* start timer */ 208603724d3SBjoern A. Zeeb callout_init(&V_nd6_slowtimo_ch, 0); 209603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 210f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 211d6ad6a86SMark Johnston 212d6ad6a86SMark Johnston nd6_dad_init(); 21330aee131SAndrey V. Elsukov if (IS_DEFAULT_VNET(curvnet)) 21430aee131SAndrey V. Elsukov lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event, 21530aee131SAndrey V. Elsukov NULL, EVENTHANDLER_PRI_ANY); 21682cd038dSYoshinobu Inoue } 21782cd038dSYoshinobu Inoue 218bc29160dSMarko Zec #ifdef VIMAGE 219bc29160dSMarko Zec void 220bc29160dSMarko Zec nd6_destroy() 221bc29160dSMarko Zec { 222bc29160dSMarko Zec 223bc29160dSMarko Zec callout_drain(&V_nd6_slowtimo_ch); 224bc29160dSMarko Zec callout_drain(&V_nd6_timer_ch); 22530aee131SAndrey V. Elsukov if (IS_DEFAULT_VNET(curvnet)) 22630aee131SAndrey V. Elsukov EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh); 227bc29160dSMarko Zec } 228bc29160dSMarko Zec #endif 229bc29160dSMarko Zec 23031b1bfe1SHajimu UMEMOTO struct nd_ifinfo * 2311272577eSXin LI nd6_ifattach(struct ifnet *ifp) 23282cd038dSYoshinobu Inoue { 23331b1bfe1SHajimu UMEMOTO struct nd_ifinfo *nd; 23482cd038dSYoshinobu Inoue 23539e19560SBjoern A. Zeeb nd = (struct nd_ifinfo *)malloc(sizeof(*nd), M_IP6NDP, M_WAITOK|M_ZERO); 23631b1bfe1SHajimu UMEMOTO nd->initialized = 1; 23782cd038dSYoshinobu Inoue 23831b1bfe1SHajimu UMEMOTO nd->chlim = IPV6_DEFHLIM; 23931b1bfe1SHajimu UMEMOTO nd->basereachable = REACHABLE_TIME; 24031b1bfe1SHajimu UMEMOTO nd->reachable = ND_COMPUTE_RTIME(nd->basereachable); 24131b1bfe1SHajimu UMEMOTO nd->retrans = RETRANS_TIMER; 242a283298cSHiroki Sato 243a283298cSHiroki Sato nd->flags = ND6_IFF_PERFORMNUD; 244a283298cSHiroki Sato 245af805644SHiroki Sato /* A loopback interface always has ND6_IFF_AUTO_LINKLOCAL. 246af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_AUTO_LINKLOCAL on an IFT_BRIDGE interface by 247af805644SHiroki Sato * default regardless of the V_ip6_auto_linklocal configuration to 248af805644SHiroki Sato * give a reasonable default behavior. 249af805644SHiroki Sato */ 250af805644SHiroki Sato if ((V_ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) || 251af805644SHiroki Sato (ifp->if_flags & IFF_LOOPBACK)) 252a283298cSHiroki Sato nd->flags |= ND6_IFF_AUTO_LINKLOCAL; 253af805644SHiroki Sato /* 254af805644SHiroki Sato * A loopback interface does not need to accept RTADV. 255af805644SHiroki Sato * XXXHRS: Clear ND6_IFF_ACCEPT_RTADV on an IFT_BRIDGE interface by 256af805644SHiroki Sato * default regardless of the V_ip6_accept_rtadv configuration to 257af805644SHiroki Sato * prevent the interface from accepting RA messages arrived 258af805644SHiroki Sato * on one of the member interfaces with ND6_IFF_ACCEPT_RTADV. 259af805644SHiroki Sato */ 260af805644SHiroki Sato if (V_ip6_accept_rtadv && 261af805644SHiroki Sato !(ifp->if_flags & IFF_LOOPBACK) && 262af805644SHiroki Sato (ifp->if_type != IFT_BRIDGE)) 263a283298cSHiroki Sato nd->flags |= ND6_IFF_ACCEPT_RTADV; 264e7fa8d0aSHiroki Sato if (V_ip6_no_radr && !(ifp->if_flags & IFF_LOOPBACK)) 265e7fa8d0aSHiroki Sato nd->flags |= ND6_IFF_NO_RADR; 26631b1bfe1SHajimu UMEMOTO 26731b1bfe1SHajimu UMEMOTO /* XXX: we cannot call nd6_setmtu since ifp is not fully initialized */ 26831b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, nd); 26931b1bfe1SHajimu UMEMOTO 27031b1bfe1SHajimu UMEMOTO return nd; 27131b1bfe1SHajimu UMEMOTO } 27231b1bfe1SHajimu UMEMOTO 27331b1bfe1SHajimu UMEMOTO void 2741272577eSXin LI nd6_ifdetach(struct nd_ifinfo *nd) 27531b1bfe1SHajimu UMEMOTO { 27631b1bfe1SHajimu UMEMOTO 27731b1bfe1SHajimu UMEMOTO free(nd, M_IP6NDP); 27882cd038dSYoshinobu Inoue } 27982cd038dSYoshinobu Inoue 28082cd038dSYoshinobu Inoue /* 28182cd038dSYoshinobu Inoue * Reset ND level link MTU. This function is called when the physical MTU 28282cd038dSYoshinobu Inoue * changes, which means we might have to adjust the ND level MTU. 28382cd038dSYoshinobu Inoue */ 28482cd038dSYoshinobu Inoue void 2851272577eSXin LI nd6_setmtu(struct ifnet *ifp) 28682cd038dSYoshinobu Inoue { 28731b1bfe1SHajimu UMEMOTO 28831b1bfe1SHajimu UMEMOTO nd6_setmtu0(ifp, ND_IFINFO(ifp)); 28931b1bfe1SHajimu UMEMOTO } 29031b1bfe1SHajimu UMEMOTO 29131b1bfe1SHajimu UMEMOTO /* XXX todo: do not maintain copy of ifp->if_mtu in ndi->maxmtu */ 29231b1bfe1SHajimu UMEMOTO void 2931272577eSXin LI nd6_setmtu0(struct ifnet *ifp, struct nd_ifinfo *ndi) 29431b1bfe1SHajimu UMEMOTO { 29531b3783cSHajimu UMEMOTO u_int32_t omaxmtu; 29631b1bfe1SHajimu UMEMOTO 29731b3783cSHajimu UMEMOTO omaxmtu = ndi->maxmtu; 29882cd038dSYoshinobu Inoue 29982cd038dSYoshinobu Inoue switch (ifp->if_type) { 30031b3783cSHajimu UMEMOTO case IFT_ARCNET: 30131b3783cSHajimu UMEMOTO ndi->maxmtu = MIN(ARC_PHDS_MAXMTU, ifp->if_mtu); /* RFC2497 */ 30282cd038dSYoshinobu Inoue break; 30382cd038dSYoshinobu Inoue case IFT_FDDI: 30431b3783cSHajimu UMEMOTO ndi->maxmtu = MIN(FDDIIPMTU, ifp->if_mtu); /* RFC2467 */ 30582cd038dSYoshinobu Inoue break; 3062049fdeeSMatthew N. Dodd case IFT_ISO88025: 3072049fdeeSMatthew N. Dodd ndi->maxmtu = MIN(ISO88025_MAX_MTU, ifp->if_mtu); 3082049fdeeSMatthew N. Dodd break; 30982cd038dSYoshinobu Inoue default: 31082cd038dSYoshinobu Inoue ndi->maxmtu = ifp->if_mtu; 31182cd038dSYoshinobu Inoue break; 31282cd038dSYoshinobu Inoue } 31382cd038dSYoshinobu Inoue 31482cd038dSYoshinobu Inoue /* 31531b3783cSHajimu UMEMOTO * Decreasing the interface MTU under IPV6 minimum MTU may cause 31631b3783cSHajimu UMEMOTO * undesirable situation. We thus notify the operator of the change 31731b3783cSHajimu UMEMOTO * explicitly. The check for omaxmtu is necessary to restrict the 31831b3783cSHajimu UMEMOTO * log to the case of changing the MTU, not initializing it. 31982cd038dSYoshinobu Inoue */ 32031b3783cSHajimu UMEMOTO if (omaxmtu >= IPV6_MMTU && ndi->maxmtu < IPV6_MMTU) { 32131b3783cSHajimu UMEMOTO log(LOG_NOTICE, "nd6_setmtu0: " 32231b3783cSHajimu UMEMOTO "new link MTU on %s (%lu) is too small for IPv6\n", 32331b3783cSHajimu UMEMOTO if_name(ifp), (unsigned long)ndi->maxmtu); 32482cd038dSYoshinobu Inoue } 32531b3783cSHajimu UMEMOTO 326603724d3SBjoern A. Zeeb if (ndi->maxmtu > V_in6_maxmtu) 32731b3783cSHajimu UMEMOTO in6_setmaxmtu(); /* check all interfaces just in case */ 32831b3783cSHajimu UMEMOTO 32982cd038dSYoshinobu Inoue } 33082cd038dSYoshinobu Inoue 33182cd038dSYoshinobu Inoue void 3321272577eSXin LI nd6_option_init(void *opt, int icmp6len, union nd_opts *ndopts) 33382cd038dSYoshinobu Inoue { 33407eb2995SHajimu UMEMOTO 33582cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 33682cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)opt; 33782cd038dSYoshinobu Inoue ndopts->nd_opts_last 33882cd038dSYoshinobu Inoue = (struct nd_opt_hdr *)(((u_char *)opt) + icmp6len); 33982cd038dSYoshinobu Inoue 34082cd038dSYoshinobu Inoue if (icmp6len == 0) { 34182cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 34282cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 34382cd038dSYoshinobu Inoue } 34482cd038dSYoshinobu Inoue } 34582cd038dSYoshinobu Inoue 34682cd038dSYoshinobu Inoue /* 34782cd038dSYoshinobu Inoue * Take one ND option. 34882cd038dSYoshinobu Inoue */ 34982cd038dSYoshinobu Inoue struct nd_opt_hdr * 3501272577eSXin LI nd6_option(union nd_opts *ndopts) 35182cd038dSYoshinobu Inoue { 35282cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 35382cd038dSYoshinobu Inoue int olen; 35482cd038dSYoshinobu Inoue 35539e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 35639e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 35739e19560SBjoern A. Zeeb __func__)); 3582ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 35982cd038dSYoshinobu Inoue return NULL; 36082cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 36182cd038dSYoshinobu Inoue return NULL; 36282cd038dSYoshinobu Inoue 36382cd038dSYoshinobu Inoue nd_opt = ndopts->nd_opts_search; 36482cd038dSYoshinobu Inoue 36519391949SKris Kennaway /* make sure nd_opt_len is inside the buffer */ 36619391949SKris Kennaway if ((caddr_t)&nd_opt->nd_opt_len >= (caddr_t)ndopts->nd_opts_last) { 36719391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 36819391949SKris Kennaway return NULL; 36919391949SKris Kennaway } 37019391949SKris Kennaway 37182cd038dSYoshinobu Inoue olen = nd_opt->nd_opt_len << 3; 37282cd038dSYoshinobu Inoue if (olen == 0) { 37382cd038dSYoshinobu Inoue /* 37482cd038dSYoshinobu Inoue * Message validation requires that all included 37582cd038dSYoshinobu Inoue * options have a length that is greater than zero. 37682cd038dSYoshinobu Inoue */ 37782cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 37882cd038dSYoshinobu Inoue return NULL; 37982cd038dSYoshinobu Inoue } 38082cd038dSYoshinobu Inoue 38182cd038dSYoshinobu Inoue ndopts->nd_opts_search = (struct nd_opt_hdr *)((caddr_t)nd_opt + olen); 38219391949SKris Kennaway if (ndopts->nd_opts_search > ndopts->nd_opts_last) { 38319391949SKris Kennaway /* option overruns the end of buffer, invalid */ 38419391949SKris Kennaway bzero(ndopts, sizeof(*ndopts)); 38519391949SKris Kennaway return NULL; 38619391949SKris Kennaway } else if (ndopts->nd_opts_search == ndopts->nd_opts_last) { 38719391949SKris Kennaway /* reached the end of options chain */ 38882cd038dSYoshinobu Inoue ndopts->nd_opts_done = 1; 38982cd038dSYoshinobu Inoue ndopts->nd_opts_search = NULL; 39082cd038dSYoshinobu Inoue } 39182cd038dSYoshinobu Inoue return nd_opt; 39282cd038dSYoshinobu Inoue } 39382cd038dSYoshinobu Inoue 39482cd038dSYoshinobu Inoue /* 39582cd038dSYoshinobu Inoue * Parse multiple ND options. 39682cd038dSYoshinobu Inoue * This function is much easier to use, for ND routines that do not need 39782cd038dSYoshinobu Inoue * multiple options of the same type. 39882cd038dSYoshinobu Inoue */ 39982cd038dSYoshinobu Inoue int 4001272577eSXin LI nd6_options(union nd_opts *ndopts) 40182cd038dSYoshinobu Inoue { 40282cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 40382cd038dSYoshinobu Inoue int i = 0; 40482cd038dSYoshinobu Inoue 40539e19560SBjoern A. Zeeb KASSERT(ndopts != NULL, ("%s: ndopts == NULL", __func__)); 40639e19560SBjoern A. Zeeb KASSERT(ndopts->nd_opts_last != NULL, ("%s: uninitialized ndopts", 40739e19560SBjoern A. Zeeb __func__)); 4082ce62dceSSUZUKI Shinsuke if (ndopts->nd_opts_search == NULL) 40982cd038dSYoshinobu Inoue return 0; 41082cd038dSYoshinobu Inoue 41182cd038dSYoshinobu Inoue while (1) { 41282cd038dSYoshinobu Inoue nd_opt = nd6_option(ndopts); 4132ce62dceSSUZUKI Shinsuke if (nd_opt == NULL && ndopts->nd_opts_last == NULL) { 41482cd038dSYoshinobu Inoue /* 41582cd038dSYoshinobu Inoue * Message validation requires that all included 41682cd038dSYoshinobu Inoue * options have a length that is greater than zero. 41782cd038dSYoshinobu Inoue */ 418e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_badopt); 41982cd038dSYoshinobu Inoue bzero(ndopts, sizeof(*ndopts)); 42082cd038dSYoshinobu Inoue return -1; 42182cd038dSYoshinobu Inoue } 42282cd038dSYoshinobu Inoue 4232ce62dceSSUZUKI Shinsuke if (nd_opt == NULL) 42482cd038dSYoshinobu Inoue goto skip1; 42582cd038dSYoshinobu Inoue 42682cd038dSYoshinobu Inoue switch (nd_opt->nd_opt_type) { 42782cd038dSYoshinobu Inoue case ND_OPT_SOURCE_LINKADDR: 42882cd038dSYoshinobu Inoue case ND_OPT_TARGET_LINKADDR: 42982cd038dSYoshinobu Inoue case ND_OPT_MTU: 43082cd038dSYoshinobu Inoue case ND_OPT_REDIRECTED_HEADER: 43111d8451dSHiroki Sato case ND_OPT_NONCE: 43282cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { 43333841545SHajimu UMEMOTO nd6log((LOG_INFO, 43433841545SHajimu UMEMOTO "duplicated ND6 option found (type=%d)\n", 43533841545SHajimu UMEMOTO nd_opt->nd_opt_type)); 43682cd038dSYoshinobu Inoue /* XXX bark? */ 43782cd038dSYoshinobu Inoue } else { 43882cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 43982cd038dSYoshinobu Inoue = nd_opt; 44082cd038dSYoshinobu Inoue } 44182cd038dSYoshinobu Inoue break; 44282cd038dSYoshinobu Inoue case ND_OPT_PREFIX_INFORMATION: 44382cd038dSYoshinobu Inoue if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) { 44482cd038dSYoshinobu Inoue ndopts->nd_opt_array[nd_opt->nd_opt_type] 44582cd038dSYoshinobu Inoue = nd_opt; 44682cd038dSYoshinobu Inoue } 44782cd038dSYoshinobu Inoue ndopts->nd_opts_pi_end = 44882cd038dSYoshinobu Inoue (struct nd_opt_prefix_info *)nd_opt; 44982cd038dSYoshinobu Inoue break; 450abbe8356SBjoern A. Zeeb /* What about ND_OPT_ROUTE_INFO? RFC 4191 */ 451abbe8356SBjoern A. Zeeb case ND_OPT_RDNSS: /* RFC 6106 */ 452abbe8356SBjoern A. Zeeb case ND_OPT_DNSSL: /* RFC 6106 */ 453abbe8356SBjoern A. Zeeb /* 454abbe8356SBjoern A. Zeeb * Silently ignore options we know and do not care about 455abbe8356SBjoern A. Zeeb * in the kernel. 456abbe8356SBjoern A. Zeeb */ 457abbe8356SBjoern A. Zeeb break; 45882cd038dSYoshinobu Inoue default: 45982cd038dSYoshinobu Inoue /* 46082cd038dSYoshinobu Inoue * Unknown options must be silently ignored, 46182cd038dSYoshinobu Inoue * to accomodate future extension to the protocol. 46282cd038dSYoshinobu Inoue */ 46333841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 46482cd038dSYoshinobu Inoue "nd6_options: unsupported option %d - " 46533841545SHajimu UMEMOTO "option ignored\n", nd_opt->nd_opt_type)); 46682cd038dSYoshinobu Inoue } 46782cd038dSYoshinobu Inoue 46882cd038dSYoshinobu Inoue skip1: 46982cd038dSYoshinobu Inoue i++; 470603724d3SBjoern A. Zeeb if (i > V_nd6_maxndopt) { 471e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_nd_toomanyopt); 47233841545SHajimu UMEMOTO nd6log((LOG_INFO, "too many loop in nd opt\n")); 47382cd038dSYoshinobu Inoue break; 47482cd038dSYoshinobu Inoue } 47582cd038dSYoshinobu Inoue 47682cd038dSYoshinobu Inoue if (ndopts->nd_opts_done) 47782cd038dSYoshinobu Inoue break; 47882cd038dSYoshinobu Inoue } 47982cd038dSYoshinobu Inoue 48082cd038dSYoshinobu Inoue return 0; 48182cd038dSYoshinobu Inoue } 48282cd038dSYoshinobu Inoue 48382cd038dSYoshinobu Inoue /* 484743eee66SSUZUKI Shinsuke * ND6 timer routine to handle ND6 entries 48582cd038dSYoshinobu Inoue */ 48682cd038dSYoshinobu Inoue void 4876e6b3f7cSQing Li nd6_llinfo_settimer_locked(struct llentry *ln, long tick) 488743eee66SSUZUKI Shinsuke { 489ef8d671cSHajimu UMEMOTO int canceled; 490ef8d671cSHajimu UMEMOTO 491e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 492e6950476SBjoern A. Zeeb 493743eee66SSUZUKI Shinsuke if (tick < 0) { 4946e6b3f7cSQing Li ln->la_expire = 0; 495743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 4960447c136SAlexander V. Chernikov canceled = callout_stop(&ln->lle_timer); 497743eee66SSUZUKI Shinsuke } else { 4987d26db17SHiroki Sato ln->la_expire = time_uptime + tick / hz; 4996e6b3f7cSQing Li LLE_ADDREF(ln); 500743eee66SSUZUKI Shinsuke if (tick > INT_MAX) { 501743eee66SSUZUKI Shinsuke ln->ln_ntick = tick - INT_MAX; 5020447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, INT_MAX, 503743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 504743eee66SSUZUKI Shinsuke } else { 505743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 5060447c136SAlexander V. Chernikov canceled = callout_reset(&ln->lle_timer, tick, 507743eee66SSUZUKI Shinsuke nd6_llinfo_timer, ln); 508743eee66SSUZUKI Shinsuke } 509743eee66SSUZUKI Shinsuke } 510ef8d671cSHajimu UMEMOTO if (canceled) 511ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 512743eee66SSUZUKI Shinsuke } 51382cd038dSYoshinobu Inoue 51426deb882SAlexander V. Chernikov /* 51526deb882SAlexander V. Chernikov * Gets source address of the first packet in hold queue 51626deb882SAlexander V. Chernikov * and stores it in @src. 51726deb882SAlexander V. Chernikov * Returns pointer to @src (if hold queue is not empty) or NULL. 51826deb882SAlexander V. Chernikov * 51926deb882SAlexander V. Chernikov */ 52026deb882SAlexander V. Chernikov static struct in6_addr * 52126deb882SAlexander V. Chernikov nd6_llinfo_get_holdsrc(struct llentry *ln, struct in6_addr *src) 52226deb882SAlexander V. Chernikov { 52326deb882SAlexander V. Chernikov struct ip6_hdr hdr; 52426deb882SAlexander V. Chernikov struct mbuf *m; 52526deb882SAlexander V. Chernikov 52626deb882SAlexander V. Chernikov if (ln->la_hold == NULL) 52726deb882SAlexander V. Chernikov return (NULL); 52826deb882SAlexander V. Chernikov 52926deb882SAlexander V. Chernikov /* 53026deb882SAlexander V. Chernikov * assume every packet in la_hold has the same IP header 53126deb882SAlexander V. Chernikov */ 53226deb882SAlexander V. Chernikov m = ln->la_hold; 53326deb882SAlexander V. Chernikov if (sizeof(hdr) < m->m_len) 53426deb882SAlexander V. Chernikov return (NULL); 53526deb882SAlexander V. Chernikov 53626deb882SAlexander V. Chernikov m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr); 53726deb882SAlexander V. Chernikov *src = hdr.ip6_src; 53826deb882SAlexander V. Chernikov 53926deb882SAlexander V. Chernikov return (src); 54026deb882SAlexander V. Chernikov } 54126deb882SAlexander V. Chernikov 5426e6b3f7cSQing Li void 5436e6b3f7cSQing Li nd6_llinfo_settimer(struct llentry *ln, long tick) 5446e6b3f7cSQing Li { 5456e6b3f7cSQing Li 5466e6b3f7cSQing Li LLE_WLOCK(ln); 5476e6b3f7cSQing Li nd6_llinfo_settimer_locked(ln, tick); 5486e6b3f7cSQing Li LLE_WUNLOCK(ln); 5496e6b3f7cSQing Li } 5506e6b3f7cSQing Li 551743eee66SSUZUKI Shinsuke static void 5521272577eSXin LI nd6_llinfo_timer(void *arg) 553743eee66SSUZUKI Shinsuke { 5546e6b3f7cSQing Li struct llentry *ln; 55526deb882SAlexander V. Chernikov struct in6_addr *dst, *pdst, *psrc, src; 556743eee66SSUZUKI Shinsuke struct ifnet *ifp; 557686cdd19SJun-ichiro itojun Hagino struct nd_ifinfo *ndi = NULL; 55826deb882SAlexander V. Chernikov int send_ns; 55982cd038dSYoshinobu Inoue 56019291ab3SBjoern A. Zeeb KASSERT(arg != NULL, ("%s: arg NULL", __func__)); 5616e6b3f7cSQing Li ln = (struct llentry *)arg; 5622575fbb8SRandall Stewart LLE_WLOCK(ln); 5630447c136SAlexander V. Chernikov if (callout_pending(&ln->lle_timer)) { 5642575fbb8SRandall Stewart /* 5652575fbb8SRandall Stewart * Here we are a bit odd here in the treatment of 5662575fbb8SRandall Stewart * active/pending. If the pending bit is set, it got 5672575fbb8SRandall Stewart * rescheduled before I ran. The active 5682575fbb8SRandall Stewart * bit we ignore, since if it was stopped 5692575fbb8SRandall Stewart * in ll_tablefree() and was currently running 5702575fbb8SRandall Stewart * it would have return 0 so the code would 5712575fbb8SRandall Stewart * not have deleted it since the callout could 5722575fbb8SRandall Stewart * not be stopped so we want to go through 5732575fbb8SRandall Stewart * with the delete here now. If the callout 5742575fbb8SRandall Stewart * was restarted, the pending bit will be back on and 5752575fbb8SRandall Stewart * we just want to bail since the callout_reset would 5762575fbb8SRandall Stewart * return 1 and our reference would have been removed 5772575fbb8SRandall Stewart * by nd6_llinfo_settimer_locked above since canceled 5782575fbb8SRandall Stewart * would have been 1. 5792575fbb8SRandall Stewart */ 5802575fbb8SRandall Stewart LLE_WUNLOCK(ln); 5812575fbb8SRandall Stewart return; 5822575fbb8SRandall Stewart } 58319291ab3SBjoern A. Zeeb ifp = ln->lle_tbl->llt_ifp; 5846e6b3f7cSQing Li CURVNET_SET(ifp->if_vnet); 58526deb882SAlexander V. Chernikov ndi = ND_IFINFO(ifp); 58626deb882SAlexander V. Chernikov send_ns = 0; 58726deb882SAlexander V. Chernikov dst = &ln->r_l3addr.addr6; 58826deb882SAlexander V. Chernikov pdst = dst; 58982cd038dSYoshinobu Inoue 590743eee66SSUZUKI Shinsuke if (ln->ln_ntick > 0) { 591743eee66SSUZUKI Shinsuke if (ln->ln_ntick > INT_MAX) { 592743eee66SSUZUKI Shinsuke ln->ln_ntick -= INT_MAX; 593e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, INT_MAX); 594743eee66SSUZUKI Shinsuke } else { 595743eee66SSUZUKI Shinsuke ln->ln_ntick = 0; 596e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, ln->ln_ntick); 59782cd038dSYoshinobu Inoue } 5986e6b3f7cSQing Li goto done; 599743eee66SSUZUKI Shinsuke } 600743eee66SSUZUKI Shinsuke 601287e3cb4SHajimu UMEMOTO if (ln->la_flags & LLE_STATIC) { 6026e6b3f7cSQing Li goto done; 6036e6b3f7cSQing Li } 60482cd038dSYoshinobu Inoue 6056e6b3f7cSQing Li if (ln->la_flags & LLE_DELETED) { 606d3cdb716SAlexander V. Chernikov nd6_free(ln, 0); 6072eb10edcSHajimu UMEMOTO ln = NULL; 6086e6b3f7cSQing Li goto done; 6096e6b3f7cSQing Li } 61082cd038dSYoshinobu Inoue 61182cd038dSYoshinobu Inoue switch (ln->ln_state) { 61282cd038dSYoshinobu Inoue case ND6_LLINFO_INCOMPLETE: 6136e6b3f7cSQing Li if (ln->la_asked < V_nd6_mmaxtries) { 6146e6b3f7cSQing Li ln->la_asked++; 61526deb882SAlexander V. Chernikov send_ns = 1; 61626deb882SAlexander V. Chernikov /* Send NS to multicast address */ 61726deb882SAlexander V. Chernikov pdst = NULL; 61882cd038dSYoshinobu Inoue } else { 6196e6b3f7cSQing Li struct mbuf *m = ln->la_hold; 62082cd038dSYoshinobu Inoue if (m) { 62131d4137bSSUZUKI Shinsuke struct mbuf *m0; 62231d4137bSSUZUKI Shinsuke 62382cd038dSYoshinobu Inoue /* 6246e6b3f7cSQing Li * assuming every packet in la_hold has the 625e6950476SBjoern A. Zeeb * same IP header. Send error after unlock. 62682cd038dSYoshinobu Inoue */ 62731d4137bSSUZUKI Shinsuke m0 = m->m_nextpkt; 62831d4137bSSUZUKI Shinsuke m->m_nextpkt = NULL; 6296e6b3f7cSQing Li ln->la_hold = m0; 63031d4137bSSUZUKI Shinsuke clear_llinfo_pqueue(ln); 63182cd038dSYoshinobu Inoue } 63263a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_TIMEDOUT); 633d3cdb716SAlexander V. Chernikov nd6_free(ln, 0); 634743eee66SSUZUKI Shinsuke ln = NULL; 635e6950476SBjoern A. Zeeb if (m != NULL) 636e6950476SBjoern A. Zeeb icmp6_error2(m, ICMP6_DST_UNREACH, 637e6950476SBjoern A. Zeeb ICMP6_DST_UNREACH_ADDR, 0, ifp); 63882cd038dSYoshinobu Inoue } 63982cd038dSYoshinobu Inoue break; 64082cd038dSYoshinobu Inoue case ND6_LLINFO_REACHABLE: 641743eee66SSUZUKI Shinsuke if (!ND6_LLINFO_PERMANENT(ln)) { 64282cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_STALE; 643e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz); 64433841545SHajimu UMEMOTO } 64582cd038dSYoshinobu Inoue break; 64633841545SHajimu UMEMOTO 64733841545SHajimu UMEMOTO case ND6_LLINFO_STALE: 64833841545SHajimu UMEMOTO /* Garbage Collection(RFC 2461 5.3) */ 649743eee66SSUZUKI Shinsuke if (!ND6_LLINFO_PERMANENT(ln)) { 65063a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED); 651d3cdb716SAlexander V. Chernikov nd6_free(ln, 1); 652743eee66SSUZUKI Shinsuke ln = NULL; 653743eee66SSUZUKI Shinsuke } 65433841545SHajimu UMEMOTO break; 65533841545SHajimu UMEMOTO 65682cd038dSYoshinobu Inoue case ND6_LLINFO_DELAY: 657686cdd19SJun-ichiro itojun Hagino if (ndi && (ndi->flags & ND6_IFF_PERFORMNUD) != 0) { 658686cdd19SJun-ichiro itojun Hagino /* We need NUD */ 6596e6b3f7cSQing Li ln->la_asked = 1; 66082cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_PROBE; 66126deb882SAlexander V. Chernikov send_ns = 1; 66233841545SHajimu UMEMOTO } else { 663686cdd19SJun-ichiro itojun Hagino ln->ln_state = ND6_LLINFO_STALE; /* XXX */ 664e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, (long)V_nd6_gctimer * hz); 66533841545SHajimu UMEMOTO } 66682cd038dSYoshinobu Inoue break; 66782cd038dSYoshinobu Inoue case ND6_LLINFO_PROBE: 6686e6b3f7cSQing Li if (ln->la_asked < V_nd6_umaxtries) { 6696e6b3f7cSQing Li ln->la_asked++; 67026deb882SAlexander V. Chernikov send_ns = 1; 67182cd038dSYoshinobu Inoue } else { 67263a97a40SNavdeep Parhar EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_EXPIRED); 673d3cdb716SAlexander V. Chernikov nd6_free(ln, 0); 674743eee66SSUZUKI Shinsuke ln = NULL; 67582cd038dSYoshinobu Inoue } 67682cd038dSYoshinobu Inoue break; 677e6950476SBjoern A. Zeeb default: 678e6950476SBjoern A. Zeeb panic("%s: paths in a dark night can be confusing: %d", 679e6950476SBjoern A. Zeeb __func__, ln->ln_state); 68082cd038dSYoshinobu Inoue } 6816e6b3f7cSQing Li done: 68226deb882SAlexander V. Chernikov if (send_ns != 0) { 68326deb882SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, (long)ndi->retrans * hz / 1000); 68426deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(ln, &src); 68526deb882SAlexander V. Chernikov LLE_FREE_LOCKED(ln); 68626deb882SAlexander V. Chernikov ln = NULL; 68726deb882SAlexander V. Chernikov nd6_ns_output(ifp, psrc, pdst, dst, NULL); 68826deb882SAlexander V. Chernikov } 68926deb882SAlexander V. Chernikov 6906e6b3f7cSQing Li if (ln != NULL) 691e6950476SBjoern A. Zeeb LLE_FREE_LOCKED(ln); 692f0c0b143SHajimu UMEMOTO CURVNET_RESTORE(); 69382cd038dSYoshinobu Inoue } 69482cd038dSYoshinobu Inoue 695743eee66SSUZUKI Shinsuke 696743eee66SSUZUKI Shinsuke /* 697743eee66SSUZUKI Shinsuke * ND6 timer routine to expire default route list and prefix list 698743eee66SSUZUKI Shinsuke */ 699743eee66SSUZUKI Shinsuke void 7008b615593SMarko Zec nd6_timer(void *arg) 701743eee66SSUZUKI Shinsuke { 70221ca7b57SMarko Zec CURVNET_SET((struct vnet *) arg); 7033b0b2840SJohn Baldwin struct nd_defrouter *dr, *ndr; 7043b0b2840SJohn Baldwin struct nd_prefix *pr, *npr; 705743eee66SSUZUKI Shinsuke struct in6_ifaddr *ia6, *nia6; 706743eee66SSUZUKI Shinsuke 707603724d3SBjoern A. Zeeb callout_reset(&V_nd6_timer_ch, V_nd6_prune * hz, 708f6dfe47aSMarko Zec nd6_timer, curvnet); 709743eee66SSUZUKI Shinsuke 71033841545SHajimu UMEMOTO /* expire default router list */ 7113b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 7127d26db17SHiroki Sato if (dr->expire && dr->expire < time_uptime) 71382cd038dSYoshinobu Inoue defrtrlist_del(dr); 714686cdd19SJun-ichiro itojun Hagino } 71582cd038dSYoshinobu Inoue 71633841545SHajimu UMEMOTO /* 71733841545SHajimu UMEMOTO * expire interface addresses. 71833841545SHajimu UMEMOTO * in the past the loop was inside prefix expiry processing. 71933841545SHajimu UMEMOTO * However, from a stricter speci-confrmance standpoint, we should 72033841545SHajimu UMEMOTO * rather separate address lifetimes and prefix lifetimes. 721d1da0a06SRobert Watson * 722d1da0a06SRobert Watson * XXXRW: in6_ifaddrhead locking. 72333841545SHajimu UMEMOTO */ 72433841545SHajimu UMEMOTO addrloop: 72580af0152SRobert Watson TAILQ_FOREACH_SAFE(ia6, &V_in6_ifaddrhead, ia_link, nia6) { 72682cd038dSYoshinobu Inoue /* check address lifetime */ 72733841545SHajimu UMEMOTO if (IFA6_IS_INVALID(ia6)) { 72833841545SHajimu UMEMOTO int regen = 0; 72933841545SHajimu UMEMOTO 73033841545SHajimu UMEMOTO /* 73133841545SHajimu UMEMOTO * If the expiring address is temporary, try 73233841545SHajimu UMEMOTO * regenerating a new one. This would be useful when 73388ff5695SSUZUKI Shinsuke * we suspended a laptop PC, then turned it on after a 73433841545SHajimu UMEMOTO * period that could invalidate all temporary 73533841545SHajimu UMEMOTO * addresses. Although we may have to restart the 73633841545SHajimu UMEMOTO * loop (see below), it must be after purging the 73733841545SHajimu UMEMOTO * address. Otherwise, we'd see an infinite loop of 73833841545SHajimu UMEMOTO * regeneration. 73933841545SHajimu UMEMOTO */ 740603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 74133841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0) { 74233841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) 74333841545SHajimu UMEMOTO regen = 1; 74433841545SHajimu UMEMOTO } 74533841545SHajimu UMEMOTO 74633841545SHajimu UMEMOTO in6_purgeaddr(&ia6->ia_ifa); 74733841545SHajimu UMEMOTO 74833841545SHajimu UMEMOTO if (regen) 74933841545SHajimu UMEMOTO goto addrloop; /* XXX: see below */ 75043068328SHajimu UMEMOTO } else if (IFA6_IS_DEPRECATED(ia6)) { 75133841545SHajimu UMEMOTO int oldflags = ia6->ia6_flags; 75233841545SHajimu UMEMOTO 75382cd038dSYoshinobu Inoue ia6->ia6_flags |= IN6_IFF_DEPRECATED; 75433841545SHajimu UMEMOTO 75533841545SHajimu UMEMOTO /* 75633841545SHajimu UMEMOTO * If a temporary address has just become deprecated, 75733841545SHajimu UMEMOTO * regenerate a new one if possible. 75833841545SHajimu UMEMOTO */ 759603724d3SBjoern A. Zeeb if (V_ip6_use_tempaddr && 76033841545SHajimu UMEMOTO (ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 76133841545SHajimu UMEMOTO (oldflags & IN6_IFF_DEPRECATED) == 0) { 76233841545SHajimu UMEMOTO 76333841545SHajimu UMEMOTO if (regen_tmpaddr(ia6) == 0) { 76433841545SHajimu UMEMOTO /* 76533841545SHajimu UMEMOTO * A new temporary address is 76633841545SHajimu UMEMOTO * generated. 76733841545SHajimu UMEMOTO * XXX: this means the address chain 76833841545SHajimu UMEMOTO * has changed while we are still in 76933841545SHajimu UMEMOTO * the loop. Although the change 77033841545SHajimu UMEMOTO * would not cause disaster (because 77188ff5695SSUZUKI Shinsuke * it's not a deletion, but an 77288ff5695SSUZUKI Shinsuke * addition,) we'd rather restart the 77333841545SHajimu UMEMOTO * loop just for safety. Or does this 77433841545SHajimu UMEMOTO * significantly reduce performance?? 77533841545SHajimu UMEMOTO */ 77633841545SHajimu UMEMOTO goto addrloop; 77733841545SHajimu UMEMOTO } 77833841545SHajimu UMEMOTO } 77983649f07SHajimu UMEMOTO } else { 78033841545SHajimu UMEMOTO /* 78133841545SHajimu UMEMOTO * A new RA might have made a deprecated address 78233841545SHajimu UMEMOTO * preferred. 78333841545SHajimu UMEMOTO */ 78433841545SHajimu UMEMOTO ia6->ia6_flags &= ~IN6_IFF_DEPRECATED; 78582cd038dSYoshinobu Inoue } 78682cd038dSYoshinobu Inoue } 78782cd038dSYoshinobu Inoue 78833841545SHajimu UMEMOTO /* expire prefix list */ 7893b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 79082cd038dSYoshinobu Inoue /* 79182cd038dSYoshinobu Inoue * check prefix lifetime. 79282cd038dSYoshinobu Inoue * since pltime is just for autoconf, pltime processing for 79382cd038dSYoshinobu Inoue * prefix is not necessary. 79482cd038dSYoshinobu Inoue */ 795743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime != ND6_INFINITE_LIFETIME && 7967d26db17SHiroki Sato time_uptime - pr->ndpr_lastupdate > pr->ndpr_vltime) { 79782cd038dSYoshinobu Inoue 79882cd038dSYoshinobu Inoue /* 79982cd038dSYoshinobu Inoue * address expiration and prefix expiration are 80033841545SHajimu UMEMOTO * separate. NEVER perform in6_purgeaddr here. 80182cd038dSYoshinobu Inoue */ 80282cd038dSYoshinobu Inoue prelist_remove(pr); 8033b0b2840SJohn Baldwin } 80482cd038dSYoshinobu Inoue } 8058b615593SMarko Zec CURVNET_RESTORE(); 80682cd038dSYoshinobu Inoue } 80782cd038dSYoshinobu Inoue 8081272577eSXin LI /* 8091272577eSXin LI * ia6 - deprecated/invalidated temporary address 8101272577eSXin LI */ 81133841545SHajimu UMEMOTO static int 8121272577eSXin LI regen_tmpaddr(struct in6_ifaddr *ia6) 81333841545SHajimu UMEMOTO { 81433841545SHajimu UMEMOTO struct ifaddr *ifa; 81533841545SHajimu UMEMOTO struct ifnet *ifp; 81633841545SHajimu UMEMOTO struct in6_ifaddr *public_ifa6 = NULL; 81733841545SHajimu UMEMOTO 81833841545SHajimu UMEMOTO ifp = ia6->ia_ifa.ifa_ifp; 819137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 820c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 82133841545SHajimu UMEMOTO struct in6_ifaddr *it6; 82233841545SHajimu UMEMOTO 82333841545SHajimu UMEMOTO if (ifa->ifa_addr->sa_family != AF_INET6) 82433841545SHajimu UMEMOTO continue; 82533841545SHajimu UMEMOTO 82633841545SHajimu UMEMOTO it6 = (struct in6_ifaddr *)ifa; 82733841545SHajimu UMEMOTO 82833841545SHajimu UMEMOTO /* ignore no autoconf addresses. */ 82933841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0) 83033841545SHajimu UMEMOTO continue; 83133841545SHajimu UMEMOTO 83233841545SHajimu UMEMOTO /* ignore autoconf addresses with different prefixes. */ 83333841545SHajimu UMEMOTO if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr) 83433841545SHajimu UMEMOTO continue; 83533841545SHajimu UMEMOTO 83633841545SHajimu UMEMOTO /* 83733841545SHajimu UMEMOTO * Now we are looking at an autoconf address with the same 83833841545SHajimu UMEMOTO * prefix as ours. If the address is temporary and is still 83933841545SHajimu UMEMOTO * preferred, do not create another one. It would be rare, but 84033841545SHajimu UMEMOTO * could happen, for example, when we resume a laptop PC after 84133841545SHajimu UMEMOTO * a long period. 84233841545SHajimu UMEMOTO */ 84333841545SHajimu UMEMOTO if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 84433841545SHajimu UMEMOTO !IFA6_IS_DEPRECATED(it6)) { 84533841545SHajimu UMEMOTO public_ifa6 = NULL; 84633841545SHajimu UMEMOTO break; 84733841545SHajimu UMEMOTO } 84833841545SHajimu UMEMOTO 84933841545SHajimu UMEMOTO /* 85033841545SHajimu UMEMOTO * This is a public autoconf address that has the same prefix 85133841545SHajimu UMEMOTO * as ours. If it is preferred, keep it. We can't break the 85233841545SHajimu UMEMOTO * loop here, because there may be a still-preferred temporary 85333841545SHajimu UMEMOTO * address with the prefix. 85433841545SHajimu UMEMOTO */ 85533841545SHajimu UMEMOTO if (!IFA6_IS_DEPRECATED(it6)) 85633841545SHajimu UMEMOTO public_ifa6 = it6; 857dff78447SMark Johnston } 858c1752bcdSQing Li if (public_ifa6 != NULL) 859c1752bcdSQing Li ifa_ref(&public_ifa6->ia_ifa); 860137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 86133841545SHajimu UMEMOTO 86233841545SHajimu UMEMOTO if (public_ifa6 != NULL) { 86333841545SHajimu UMEMOTO int e; 86433841545SHajimu UMEMOTO 865743eee66SSUZUKI Shinsuke if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) { 866c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 86733841545SHajimu UMEMOTO log(LOG_NOTICE, "regen_tmpaddr: failed to create a new" 86833841545SHajimu UMEMOTO " tmp addr,errno=%d\n", e); 86933841545SHajimu UMEMOTO return (-1); 87033841545SHajimu UMEMOTO } 871c1752bcdSQing Li ifa_free(&public_ifa6->ia_ifa); 87233841545SHajimu UMEMOTO return (0); 87333841545SHajimu UMEMOTO } 87433841545SHajimu UMEMOTO 87533841545SHajimu UMEMOTO return (-1); 87633841545SHajimu UMEMOTO } 87733841545SHajimu UMEMOTO 878686cdd19SJun-ichiro itojun Hagino /* 879686cdd19SJun-ichiro itojun Hagino * Nuke neighbor cache/prefix/default router management table, right before 880686cdd19SJun-ichiro itojun Hagino * ifp goes away. 881686cdd19SJun-ichiro itojun Hagino */ 882686cdd19SJun-ichiro itojun Hagino void 8831272577eSXin LI nd6_purge(struct ifnet *ifp) 884686cdd19SJun-ichiro itojun Hagino { 885743eee66SSUZUKI Shinsuke struct nd_defrouter *dr, *ndr; 886686cdd19SJun-ichiro itojun Hagino struct nd_prefix *pr, *npr; 887686cdd19SJun-ichiro itojun Hagino 888686cdd19SJun-ichiro itojun Hagino /* 889743eee66SSUZUKI Shinsuke * Nuke default router list entries toward ifp. 890743eee66SSUZUKI Shinsuke * We defer removal of default router list entries that is installed 891743eee66SSUZUKI Shinsuke * in the routing table, in order to keep additional side effects as 892743eee66SSUZUKI Shinsuke * small as possible. 893686cdd19SJun-ichiro itojun Hagino */ 8943b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 895743eee66SSUZUKI Shinsuke if (dr->installed) 896743eee66SSUZUKI Shinsuke continue; 897743eee66SSUZUKI Shinsuke 898686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 899686cdd19SJun-ichiro itojun Hagino defrtrlist_del(dr); 900686cdd19SJun-ichiro itojun Hagino } 901743eee66SSUZUKI Shinsuke 9023b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, ndr) { 903743eee66SSUZUKI Shinsuke if (!dr->installed) 904743eee66SSUZUKI Shinsuke continue; 905743eee66SSUZUKI Shinsuke 906686cdd19SJun-ichiro itojun Hagino if (dr->ifp == ifp) 907686cdd19SJun-ichiro itojun Hagino defrtrlist_del(dr); 908686cdd19SJun-ichiro itojun Hagino } 909686cdd19SJun-ichiro itojun Hagino 910686cdd19SJun-ichiro itojun Hagino /* Nuke prefix list entries toward ifp */ 9113b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, npr) { 912686cdd19SJun-ichiro itojun Hagino if (pr->ndpr_ifp == ifp) { 91333841545SHajimu UMEMOTO /* 914743eee66SSUZUKI Shinsuke * Because if_detach() does *not* release prefixes 915743eee66SSUZUKI Shinsuke * while purging addresses the reference count will 916743eee66SSUZUKI Shinsuke * still be above zero. We therefore reset it to 917743eee66SSUZUKI Shinsuke * make sure that the prefix really gets purged. 918743eee66SSUZUKI Shinsuke */ 919743eee66SSUZUKI Shinsuke pr->ndpr_refcnt = 0; 920743eee66SSUZUKI Shinsuke 921743eee66SSUZUKI Shinsuke /* 92233841545SHajimu UMEMOTO * Previously, pr->ndpr_addr is removed as well, 92333841545SHajimu UMEMOTO * but I strongly believe we don't have to do it. 92433841545SHajimu UMEMOTO * nd6_purge() is only called from in6_ifdetach(), 92533841545SHajimu UMEMOTO * which removes all the associated interface addresses 92633841545SHajimu UMEMOTO * by itself. 92733841545SHajimu UMEMOTO * (jinmei@kame.net 20010129) 92833841545SHajimu UMEMOTO */ 929686cdd19SJun-ichiro itojun Hagino prelist_remove(pr); 930686cdd19SJun-ichiro itojun Hagino } 931686cdd19SJun-ichiro itojun Hagino } 932686cdd19SJun-ichiro itojun Hagino 933686cdd19SJun-ichiro itojun Hagino /* cancel default outgoing interface setting */ 934603724d3SBjoern A. Zeeb if (V_nd6_defifindex == ifp->if_index) 935686cdd19SJun-ichiro itojun Hagino nd6_setdefaultiface(0); 936686cdd19SJun-ichiro itojun Hagino 937e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 938a283298cSHiroki Sato /* Refresh default router list. */ 939686cdd19SJun-ichiro itojun Hagino defrouter_select(); 9406e6b3f7cSQing Li } 9416e6b3f7cSQing Li 9426e6b3f7cSQing Li /* XXXXX 9436e6b3f7cSQing Li * We do not nuke the neighbor cache entries here any more 9446e6b3f7cSQing Li * because the neighbor cache is kept in if_afdata[AF_INET6]. 9456e6b3f7cSQing Li * nd6_purge() is invoked by in6_ifdetach() which is called 9466e6b3f7cSQing Li * from if_detach() where everything gets purged. So let 9476e6b3f7cSQing Li * in6_domifdetach() do the actual L2 table purging work. 9486e6b3f7cSQing Li */ 9491026ccc4SHajimu UMEMOTO } 950686cdd19SJun-ichiro itojun Hagino 951686cdd19SJun-ichiro itojun Hagino /* 9526e6b3f7cSQing Li * the caller acquires and releases the lock on the lltbls 9536e6b3f7cSQing Li * Returns the llentry locked 954686cdd19SJun-ichiro itojun Hagino */ 9556e6b3f7cSQing Li struct llentry * 956f0316e1aSAlexander V. Chernikov nd6_lookup(const struct in6_addr *addr6, int flags, struct ifnet *ifp) 95782cd038dSYoshinobu Inoue { 95882cd038dSYoshinobu Inoue struct sockaddr_in6 sin6; 9596e6b3f7cSQing Li struct llentry *ln; 96068352503SBjoern A. Zeeb int llflags; 96182cd038dSYoshinobu Inoue 96282cd038dSYoshinobu Inoue bzero(&sin6, sizeof(sin6)); 96382cd038dSYoshinobu Inoue sin6.sin6_len = sizeof(struct sockaddr_in6); 96482cd038dSYoshinobu Inoue sin6.sin6_family = AF_INET6; 96582cd038dSYoshinobu Inoue sin6.sin6_addr = *addr6; 966686cdd19SJun-ichiro itojun Hagino 9676e6b3f7cSQing Li IF_AFDATA_LOCK_ASSERT(ifp); 96882cd038dSYoshinobu Inoue 969b4b1367aSAlexander V. Chernikov llflags = (flags & ND6_EXCLUSIVE) ? LLE_EXCLUSIVE : 0; 9706e6b3f7cSQing Li ln = lla_lookup(LLTABLE6(ifp), llflags, (struct sockaddr *)&sin6); 971b4b1367aSAlexander V. Chernikov 972b4b1367aSAlexander V. Chernikov return (ln); 973b4b1367aSAlexander V. Chernikov } 974b4b1367aSAlexander V. Chernikov 975b4b1367aSAlexander V. Chernikov struct llentry * 976f0316e1aSAlexander V. Chernikov nd6_alloc(const struct in6_addr *addr6, int flags, struct ifnet *ifp) 977b4b1367aSAlexander V. Chernikov { 978b4b1367aSAlexander V. Chernikov struct sockaddr_in6 sin6; 979b4b1367aSAlexander V. Chernikov struct llentry *ln; 980b4b1367aSAlexander V. Chernikov 981b4b1367aSAlexander V. Chernikov bzero(&sin6, sizeof(sin6)); 982b4b1367aSAlexander V. Chernikov sin6.sin6_len = sizeof(struct sockaddr_in6); 983b4b1367aSAlexander V. Chernikov sin6.sin6_family = AF_INET6; 984b4b1367aSAlexander V. Chernikov sin6.sin6_addr = *addr6; 985b4b1367aSAlexander V. Chernikov 9865a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), 0, (struct sockaddr *)&sin6); 987b4b1367aSAlexander V. Chernikov if (ln != NULL) 98882cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_NOSTATE; 9896e6b3f7cSQing Li 9906e6b3f7cSQing Li return (ln); 99182cd038dSYoshinobu Inoue } 99282cd038dSYoshinobu Inoue 99382cd038dSYoshinobu Inoue /* 99477b691e0SBrian Feldman * Test whether a given IPv6 address is a neighbor or not, ignoring 99577b691e0SBrian Feldman * the actual neighbor cache. The neighbor cache is ignored in order 99677b691e0SBrian Feldman * to not reenter the routing code from within itself. 99782cd038dSYoshinobu Inoue */ 99877b691e0SBrian Feldman static int 999f0316e1aSAlexander V. Chernikov nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp) 100082cd038dSYoshinobu Inoue { 10014208ea14SHajimu UMEMOTO struct nd_prefix *pr; 1002743eee66SSUZUKI Shinsuke struct ifaddr *dstaddr; 100382cd038dSYoshinobu Inoue 1004686cdd19SJun-ichiro itojun Hagino /* 1005686cdd19SJun-ichiro itojun Hagino * A link-local address is always a neighbor. 10064208ea14SHajimu UMEMOTO * XXX: a link does not necessarily specify a single interface. 1007686cdd19SJun-ichiro itojun Hagino */ 1008a1f7e5f8SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) { 1009a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 sin6_copy; 1010a1f7e5f8SHajimu UMEMOTO u_int32_t zone; 1011a1f7e5f8SHajimu UMEMOTO 1012a1f7e5f8SHajimu UMEMOTO /* 1013a1f7e5f8SHajimu UMEMOTO * We need sin6_copy since sa6_recoverscope() may modify the 1014a1f7e5f8SHajimu UMEMOTO * content (XXX). 1015a1f7e5f8SHajimu UMEMOTO */ 1016a1f7e5f8SHajimu UMEMOTO sin6_copy = *addr; 1017a1f7e5f8SHajimu UMEMOTO if (sa6_recoverscope(&sin6_copy)) 1018a1f7e5f8SHajimu UMEMOTO return (0); /* XXX: should be impossible */ 1019a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone)) 1020a1f7e5f8SHajimu UMEMOTO return (0); 1021a1f7e5f8SHajimu UMEMOTO if (sin6_copy.sin6_scope_id == zone) 102282cd038dSYoshinobu Inoue return (1); 1023a1f7e5f8SHajimu UMEMOTO else 1024a1f7e5f8SHajimu UMEMOTO return (0); 1025a1f7e5f8SHajimu UMEMOTO } 102682cd038dSYoshinobu Inoue 102782cd038dSYoshinobu Inoue /* 102882cd038dSYoshinobu Inoue * If the address matches one of our addresses, 102982cd038dSYoshinobu Inoue * it should be a neighbor. 10304208ea14SHajimu UMEMOTO * If the address matches one of our on-link prefixes, it should be a 10314208ea14SHajimu UMEMOTO * neighbor. 103282cd038dSYoshinobu Inoue */ 10333b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 10344208ea14SHajimu UMEMOTO if (pr->ndpr_ifp != ifp) 10354208ea14SHajimu UMEMOTO continue; 103682cd038dSYoshinobu Inoue 1037baf7c373SQing Li if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) { 1038baf7c373SQing Li struct rtentry *rt; 103981d5d46bSBjoern A. Zeeb 104081d5d46bSBjoern A. Zeeb /* Always use the default FIB here. */ 104181d5d46bSBjoern A. Zeeb rt = in6_rtalloc1((struct sockaddr *)&pr->ndpr_prefix, 104281d5d46bSBjoern A. Zeeb 0, 0, RT_DEFAULT_FIB); 1043baf7c373SQing Li if (rt == NULL) 10444208ea14SHajimu UMEMOTO continue; 1045baf7c373SQing Li /* 1046baf7c373SQing Li * This is the case where multiple interfaces 1047baf7c373SQing Li * have the same prefix, but only one is installed 1048baf7c373SQing Li * into the routing table and that prefix entry 1049baf7c373SQing Li * is not the one being examined here. In the case 1050baf7c373SQing Li * where RADIX_MPATH is enabled, multiple route 1051baf7c373SQing Li * entries (of the same rt_key value) will be 1052baf7c373SQing Li * installed because the interface addresses all 1053baf7c373SQing Li * differ. 1054baf7c373SQing Li */ 1055baf7c373SQing Li if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 1056baf7c373SQing Li &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr)) { 1057baf7c373SQing Li RTFREE_LOCKED(rt); 1058baf7c373SQing Li continue; 1059baf7c373SQing Li } 1060baf7c373SQing Li RTFREE_LOCKED(rt); 1061baf7c373SQing Li } 10624208ea14SHajimu UMEMOTO 10634208ea14SHajimu UMEMOTO if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr, 10644208ea14SHajimu UMEMOTO &addr->sin6_addr, &pr->ndpr_mask)) 10654208ea14SHajimu UMEMOTO return (1); 106682cd038dSYoshinobu Inoue } 10674208ea14SHajimu UMEMOTO 10684208ea14SHajimu UMEMOTO /* 1069743eee66SSUZUKI Shinsuke * If the address is assigned on the node of the other side of 1070743eee66SSUZUKI Shinsuke * a p2p interface, the address should be a neighbor. 1071743eee66SSUZUKI Shinsuke */ 1072f0316e1aSAlexander V. Chernikov dstaddr = ifa_ifwithdstaddr((const struct sockaddr *)addr, RT_ALL_FIBS); 10738c0fec80SRobert Watson if (dstaddr != NULL) { 10748c0fec80SRobert Watson if (dstaddr->ifa_ifp == ifp) { 10758c0fec80SRobert Watson ifa_free(dstaddr); 1076743eee66SSUZUKI Shinsuke return (1); 10778c0fec80SRobert Watson } 10788c0fec80SRobert Watson ifa_free(dstaddr); 10798c0fec80SRobert Watson } 1080743eee66SSUZUKI Shinsuke 1081743eee66SSUZUKI Shinsuke /* 10824208ea14SHajimu UMEMOTO * If the default router list is empty, all addresses are regarded 10834208ea14SHajimu UMEMOTO * as on-link, and thus, as a neighbor. 10844208ea14SHajimu UMEMOTO */ 1085e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV && 10863b0b2840SJohn Baldwin TAILQ_EMPTY(&V_nd_defrouter) && 1087603724d3SBjoern A. Zeeb V_nd6_defifindex == ifp->if_index) { 108882cd038dSYoshinobu Inoue return (1); 108982cd038dSYoshinobu Inoue } 109082cd038dSYoshinobu Inoue 109177b691e0SBrian Feldman return (0); 109277b691e0SBrian Feldman } 109377b691e0SBrian Feldman 109477b691e0SBrian Feldman 109577b691e0SBrian Feldman /* 109677b691e0SBrian Feldman * Detect if a given IPv6 address identifies a neighbor on a given link. 109777b691e0SBrian Feldman * XXX: should take care of the destination of a p2p link? 109877b691e0SBrian Feldman */ 109977b691e0SBrian Feldman int 1100f0316e1aSAlexander V. Chernikov nd6_is_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp) 110177b691e0SBrian Feldman { 11026e6b3f7cSQing Li struct llentry *lle; 11036e6b3f7cSQing Li int rc = 0; 110477b691e0SBrian Feldman 11056e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 110677b691e0SBrian Feldman if (nd6_is_new_addr_neighbor(addr, ifp)) 110777b691e0SBrian Feldman return (1); 110877b691e0SBrian Feldman 110982cd038dSYoshinobu Inoue /* 111082cd038dSYoshinobu Inoue * Even if the address matches none of our addresses, it might be 111182cd038dSYoshinobu Inoue * in the neighbor cache. 111282cd038dSYoshinobu Inoue */ 111373cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 11146e6b3f7cSQing Li if ((lle = nd6_lookup(&addr->sin6_addr, 0, ifp)) != NULL) { 11156e6b3f7cSQing Li LLE_RUNLOCK(lle); 11166e6b3f7cSQing Li rc = 1; 11176e6b3f7cSQing Li } 111873cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 11196e6b3f7cSQing Li return (rc); 112082cd038dSYoshinobu Inoue } 112182cd038dSYoshinobu Inoue 112282cd038dSYoshinobu Inoue /* 112382cd038dSYoshinobu Inoue * Free an nd6 llinfo entry. 1124743eee66SSUZUKI Shinsuke * Since the function would cause significant changes in the kernel, DO NOT 1125743eee66SSUZUKI Shinsuke * make it global, unless you have a strong reason for the change, and are sure 1126743eee66SSUZUKI Shinsuke * that the change is safe. 112782cd038dSYoshinobu Inoue */ 1128d3cdb716SAlexander V. Chernikov static void 11296e6b3f7cSQing Li nd6_free(struct llentry *ln, int gc) 113082cd038dSYoshinobu Inoue { 113182cd038dSYoshinobu Inoue struct nd_defrouter *dr; 1132e6950476SBjoern A. Zeeb struct ifnet *ifp; 1133e6950476SBjoern A. Zeeb 1134e6950476SBjoern A. Zeeb LLE_WLOCK_ASSERT(ln); 113582cd038dSYoshinobu Inoue 113682cd038dSYoshinobu Inoue /* 113733841545SHajimu UMEMOTO * we used to have pfctlinput(PRC_HOSTDEAD) here. 113833841545SHajimu UMEMOTO * even though it is not harmful, it was not really necessary. 113982cd038dSYoshinobu Inoue */ 1140686cdd19SJun-ichiro itojun Hagino 1141743eee66SSUZUKI Shinsuke /* cancel timer */ 1142e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, -1); 1143e6950476SBjoern A. Zeeb 1144e6950476SBjoern A. Zeeb ifp = ln->lle_tbl->llt_ifp; 1145743eee66SSUZUKI Shinsuke 1146e7fa8d0aSHiroki Sato if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 1147314294deSAlexander V. Chernikov dr = defrouter_lookup(&ln->r_l3addr.addr6, ifp); 114833841545SHajimu UMEMOTO 1149743eee66SSUZUKI Shinsuke if (dr != NULL && dr->expire && 1150743eee66SSUZUKI Shinsuke ln->ln_state == ND6_LLINFO_STALE && gc) { 1151743eee66SSUZUKI Shinsuke /* 1152743eee66SSUZUKI Shinsuke * If the reason for the deletion is just garbage 1153743eee66SSUZUKI Shinsuke * collection, and the neighbor is an active default 1154743eee66SSUZUKI Shinsuke * router, do not delete it. Instead, reset the GC 1155743eee66SSUZUKI Shinsuke * timer using the router's lifetime. 1156743eee66SSUZUKI Shinsuke * Simply deleting the entry would affect default 1157743eee66SSUZUKI Shinsuke * router selection, which is not necessarily a good 1158743eee66SSUZUKI Shinsuke * thing, especially when we're using router preference 1159743eee66SSUZUKI Shinsuke * values. 1160743eee66SSUZUKI Shinsuke * XXX: the check for ln_state would be redundant, 1161743eee66SSUZUKI Shinsuke * but we intentionally keep it just in case. 1162743eee66SSUZUKI Shinsuke */ 11637d26db17SHiroki Sato if (dr->expire > time_uptime) 1164e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 11657d26db17SHiroki Sato (dr->expire - time_uptime) * hz); 1166743eee66SSUZUKI Shinsuke else 1167e6950476SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 1168e6950476SBjoern A. Zeeb (long)V_nd6_gctimer * hz); 1169e6950476SBjoern A. Zeeb 1170ef8d671cSHajimu UMEMOTO LLE_REMREF(ln); 1171ef8d671cSHajimu UMEMOTO LLE_WUNLOCK(ln); 1172d3cdb716SAlexander V. Chernikov return; 1173743eee66SSUZUKI Shinsuke } 1174743eee66SSUZUKI Shinsuke 1175686cdd19SJun-ichiro itojun Hagino if (dr) { 1176686cdd19SJun-ichiro itojun Hagino /* 1177686cdd19SJun-ichiro itojun Hagino * Unreachablity of a router might affect the default 1178686cdd19SJun-ichiro itojun Hagino * router selection and on-link detection of advertised 1179686cdd19SJun-ichiro itojun Hagino * prefixes. 1180686cdd19SJun-ichiro itojun Hagino */ 1181686cdd19SJun-ichiro itojun Hagino 1182686cdd19SJun-ichiro itojun Hagino /* 1183686cdd19SJun-ichiro itojun Hagino * Temporarily fake the state to choose a new default 1184686cdd19SJun-ichiro itojun Hagino * router and to perform on-link determination of 118588ff5695SSUZUKI Shinsuke * prefixes correctly. 1186686cdd19SJun-ichiro itojun Hagino * Below the state will be set correctly, 1187686cdd19SJun-ichiro itojun Hagino * or the entry itself will be deleted. 1188686cdd19SJun-ichiro itojun Hagino */ 1189686cdd19SJun-ichiro itojun Hagino ln->ln_state = ND6_LLINFO_INCOMPLETE; 11901d5089c2SBjoern A. Zeeb } 1191686cdd19SJun-ichiro itojun Hagino 11921d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) { 11931d5089c2SBjoern A. Zeeb 11941d5089c2SBjoern A. Zeeb /* 11951d5089c2SBjoern A. Zeeb * We need to unlock to avoid a LOR with rt6_flush() with the 11961d5089c2SBjoern A. Zeeb * rnh and for the calls to pfxlist_onlink_check() and 11971d5089c2SBjoern A. Zeeb * defrouter_select() in the block further down for calls 11981d5089c2SBjoern A. Zeeb * into nd6_lookup(). We still hold a ref. 11991d5089c2SBjoern A. Zeeb */ 12001d5089c2SBjoern A. Zeeb LLE_WUNLOCK(ln); 12011d5089c2SBjoern A. Zeeb 12021d5089c2SBjoern A. Zeeb /* 12031d5089c2SBjoern A. Zeeb * rt6_flush must be called whether or not the neighbor 12041d5089c2SBjoern A. Zeeb * is in the Default Router List. 12051d5089c2SBjoern A. Zeeb * See a corresponding comment in nd6_na_input(). 12061d5089c2SBjoern A. Zeeb */ 1207314294deSAlexander V. Chernikov rt6_flush(&ln->r_l3addr.addr6, ifp); 12081d5089c2SBjoern A. Zeeb } 12091d5089c2SBjoern A. Zeeb 12101d5089c2SBjoern A. Zeeb if (dr) { 121133841545SHajimu UMEMOTO /* 121233841545SHajimu UMEMOTO * Since defrouter_select() does not affect the 121333841545SHajimu UMEMOTO * on-link determination and MIP6 needs the check 121433841545SHajimu UMEMOTO * before the default router selection, we perform 121533841545SHajimu UMEMOTO * the check now. 121633841545SHajimu UMEMOTO */ 121733841545SHajimu UMEMOTO pfxlist_onlink_check(); 121833841545SHajimu UMEMOTO 1219686cdd19SJun-ichiro itojun Hagino /* 12201d5089c2SBjoern A. Zeeb * Refresh default router list. 1221686cdd19SJun-ichiro itojun Hagino */ 1222686cdd19SJun-ichiro itojun Hagino defrouter_select(); 1223686cdd19SJun-ichiro itojun Hagino } 12241d5089c2SBjoern A. Zeeb 122517a03656SEric van Gyzen /* 122617a03656SEric van Gyzen * If this entry was added by an on-link redirect, remove the 122717a03656SEric van Gyzen * corresponding host route. 122817a03656SEric van Gyzen */ 122917a03656SEric van Gyzen if (ln->la_flags & LLE_REDIRECT) 123017a03656SEric van Gyzen nd6_free_redirect(ln); 123117a03656SEric van Gyzen 12321d5089c2SBjoern A. Zeeb if (ln->ln_router || dr) 12331d5089c2SBjoern A. Zeeb LLE_WLOCK(ln); 123482cd038dSYoshinobu Inoue } 123582cd038dSYoshinobu Inoue 123633841545SHajimu UMEMOTO /* 1237e6950476SBjoern A. Zeeb * Save to unlock. We still hold an extra reference and will not 1238e6950476SBjoern A. Zeeb * free(9) in llentry_free() if someone else holds one as well. 1239e6950476SBjoern A. Zeeb */ 1240e6950476SBjoern A. Zeeb LLE_WUNLOCK(ln); 12416e6b3f7cSQing Li IF_AFDATA_LOCK(ifp); 12426e6b3f7cSQing Li LLE_WLOCK(ln); 1243b1ec2940SGleb Smirnoff /* Guard against race with other llentry_free(). */ 1244b1ec2940SGleb Smirnoff if (ln->la_flags & LLE_LINKED) { 1245d3cdb716SAlexander V. Chernikov /* Remove callout reference */ 1246becba438SBjoern A. Zeeb LLE_REMREF(ln); 1247d3cdb716SAlexander V. Chernikov lltable_unlink_entry(ln->lle_tbl, ln); 1248d3cdb716SAlexander V. Chernikov } 12496e6b3f7cSQing Li IF_AFDATA_UNLOCK(ifp); 125033841545SHajimu UMEMOTO 1251d3cdb716SAlexander V. Chernikov llentry_free(ln); 125282cd038dSYoshinobu Inoue } 125382cd038dSYoshinobu Inoue 125482cd038dSYoshinobu Inoue /* 125517a03656SEric van Gyzen * Remove the rtentry for the given llentry, 125617a03656SEric van Gyzen * both of which were installed by a redirect. 125717a03656SEric van Gyzen */ 125817a03656SEric van Gyzen static void 125917a03656SEric van Gyzen nd6_free_redirect(const struct llentry *ln) 126017a03656SEric van Gyzen { 126117a03656SEric van Gyzen int fibnum; 126217a03656SEric van Gyzen struct rtentry *rt; 126317a03656SEric van Gyzen struct radix_node_head *rnh; 126417a03656SEric van Gyzen struct sockaddr_in6 sin6; 126517a03656SEric van Gyzen 126617a03656SEric van Gyzen lltable_fill_sa_entry(ln, (struct sockaddr *)&sin6); 126717a03656SEric van Gyzen for (fibnum = 0; fibnum < rt_numfibs; fibnum++) { 126817a03656SEric van Gyzen rnh = rt_tables_get_rnh(fibnum, AF_INET6); 126917a03656SEric van Gyzen if (rnh == NULL) 127017a03656SEric van Gyzen continue; 127117a03656SEric van Gyzen 127217a03656SEric van Gyzen RADIX_NODE_HEAD_LOCK(rnh); 127317a03656SEric van Gyzen rt = in6_rtalloc1((struct sockaddr *)&sin6, 0, 127417a03656SEric van Gyzen RTF_RNH_LOCKED, fibnum); 127517a03656SEric van Gyzen if (rt) { 127617a03656SEric van Gyzen if (rt->rt_flags == (RTF_UP | RTF_HOST | RTF_DYNAMIC)) 127717a03656SEric van Gyzen rt_expunge(rnh, rt); 127817a03656SEric van Gyzen RTFREE_LOCKED(rt); 127917a03656SEric van Gyzen } 128017a03656SEric van Gyzen RADIX_NODE_HEAD_UNLOCK(rnh); 128117a03656SEric van Gyzen } 128217a03656SEric van Gyzen } 128317a03656SEric van Gyzen 128417a03656SEric van Gyzen /* 128582cd038dSYoshinobu Inoue * Upper-layer reachability hint for Neighbor Unreachability Detection. 128682cd038dSYoshinobu Inoue * 1287cd0fdcf7SHajimu UMEMOTO * XXX cost-effective methods? 128882cd038dSYoshinobu Inoue */ 128982cd038dSYoshinobu Inoue void 12901272577eSXin LI nd6_nud_hint(struct rtentry *rt, struct in6_addr *dst6, int force) 129182cd038dSYoshinobu Inoue { 12926e6b3f7cSQing Li struct llentry *ln; 12936e6b3f7cSQing Li struct ifnet *ifp; 129482cd038dSYoshinobu Inoue 12956e6b3f7cSQing Li if ((dst6 == NULL) || (rt == NULL)) 129682cd038dSYoshinobu Inoue return; 129782cd038dSYoshinobu Inoue 12986e6b3f7cSQing Li ifp = rt->rt_ifp; 1299ea0c3776SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 13006e6b3f7cSQing Li ln = nd6_lookup(dst6, ND6_EXCLUSIVE, NULL); 1301ea0c3776SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 13026e6b3f7cSQing Li if (ln == NULL) 130382cd038dSYoshinobu Inoue return; 130482cd038dSYoshinobu Inoue 1305ad8d5711SMunechika SUMIKAWA if (ln->ln_state < ND6_LLINFO_REACHABLE) 13066e6b3f7cSQing Li goto done; 130782cd038dSYoshinobu Inoue 1308686cdd19SJun-ichiro itojun Hagino /* 1309686cdd19SJun-ichiro itojun Hagino * if we get upper-layer reachability confirmation many times, 1310686cdd19SJun-ichiro itojun Hagino * it is possible we have false information. 1311686cdd19SJun-ichiro itojun Hagino */ 1312686cdd19SJun-ichiro itojun Hagino if (!force) { 1313686cdd19SJun-ichiro itojun Hagino ln->ln_byhint++; 13146e6b3f7cSQing Li if (ln->ln_byhint > V_nd6_maxnudhint) { 13156e6b3f7cSQing Li goto done; 13166e6b3f7cSQing Li } 1317686cdd19SJun-ichiro itojun Hagino } 1318686cdd19SJun-ichiro itojun Hagino 131982cd038dSYoshinobu Inoue ln->ln_state = ND6_LLINFO_REACHABLE; 1320743eee66SSUZUKI Shinsuke if (!ND6_LLINFO_PERMANENT(ln)) { 1321d715e397SBjoern A. Zeeb nd6_llinfo_settimer_locked(ln, 1322743eee66SSUZUKI Shinsuke (long)ND_IFINFO(rt->rt_ifp)->reachable * hz); 1323743eee66SSUZUKI Shinsuke } 13246e6b3f7cSQing Li done: 13256e6b3f7cSQing Li LLE_WUNLOCK(ln); 132682cd038dSYoshinobu Inoue } 132782cd038dSYoshinobu Inoue 132882cd038dSYoshinobu Inoue 13290f1aca65SQing Li /* 13300f1aca65SQing Li * Rejuvenate this function for routing operations related 13310f1aca65SQing Li * processing. 13320f1aca65SQing Li */ 13330f1aca65SQing Li void 13340f1aca65SQing Li nd6_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info) 13350f1aca65SQing Li { 133639e19560SBjoern A. Zeeb struct sockaddr_in6 *gateway; 13370f1aca65SQing Li struct nd_defrouter *dr; 133839e19560SBjoern A. Zeeb struct ifnet *ifp; 13390f1aca65SQing Li 134039e19560SBjoern A. Zeeb gateway = (struct sockaddr_in6 *)rt->rt_gateway; 134139e19560SBjoern A. Zeeb ifp = rt->rt_ifp; 13420f1aca65SQing Li 13430f1aca65SQing Li switch (req) { 13440f1aca65SQing Li case RTM_ADD: 13450f1aca65SQing Li break; 13460f1aca65SQing Li 13470f1aca65SQing Li case RTM_DELETE: 13480f1aca65SQing Li if (!ifp) 13490f1aca65SQing Li return; 13500f1aca65SQing Li /* 13510f1aca65SQing Li * Only indirect routes are interesting. 13520f1aca65SQing Li */ 13530f1aca65SQing Li if ((rt->rt_flags & RTF_GATEWAY) == 0) 13540f1aca65SQing Li return; 13550f1aca65SQing Li /* 13560f1aca65SQing Li * check for default route 13570f1aca65SQing Li */ 13580f1aca65SQing Li if (IN6_ARE_ADDR_EQUAL(&in6addr_any, 13590f1aca65SQing Li &SIN6(rt_key(rt))->sin6_addr)) { 13600f1aca65SQing Li 13610f1aca65SQing Li dr = defrouter_lookup(&gateway->sin6_addr, ifp); 13620f1aca65SQing Li if (dr != NULL) 13630f1aca65SQing Li dr->installed = 0; 13640f1aca65SQing Li } 13650f1aca65SQing Li break; 13660f1aca65SQing Li } 13670f1aca65SQing Li } 13680f1aca65SQing Li 13690f1aca65SQing Li 137082cd038dSYoshinobu Inoue int 13711272577eSXin LI nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp) 137282cd038dSYoshinobu Inoue { 137382cd038dSYoshinobu Inoue struct in6_ndireq *ndi = (struct in6_ndireq *)data; 137482cd038dSYoshinobu Inoue struct in6_nbrinfo *nbi = (struct in6_nbrinfo *)data; 1375686cdd19SJun-ichiro itojun Hagino struct in6_ndifreq *ndif = (struct in6_ndifreq *)data; 1376d0bec2c5SHiroki Sato int error = 0; 137782cd038dSYoshinobu Inoue 13780de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 13790de0dd9bSHiroki Sato return (EPFNOSUPPORT); 138082cd038dSYoshinobu Inoue switch (cmd) { 138133841545SHajimu UMEMOTO case OSIOCGIFINFO_IN6: 13822ce62dceSSUZUKI Shinsuke #define ND ndi->ndi 138331b1bfe1SHajimu UMEMOTO /* XXX: old ndp(8) assumes a positive value for linkmtu. */ 13842ce62dceSSUZUKI Shinsuke bzero(&ND, sizeof(ND)); 13852ce62dceSSUZUKI Shinsuke ND.linkmtu = IN6_LINKMTU(ifp); 13862ce62dceSSUZUKI Shinsuke ND.maxmtu = ND_IFINFO(ifp)->maxmtu; 13872ce62dceSSUZUKI Shinsuke ND.basereachable = ND_IFINFO(ifp)->basereachable; 13882ce62dceSSUZUKI Shinsuke ND.reachable = ND_IFINFO(ifp)->reachable; 13892ce62dceSSUZUKI Shinsuke ND.retrans = ND_IFINFO(ifp)->retrans; 13902ce62dceSSUZUKI Shinsuke ND.flags = ND_IFINFO(ifp)->flags; 13912ce62dceSSUZUKI Shinsuke ND.recalctm = ND_IFINFO(ifp)->recalctm; 13922ce62dceSSUZUKI Shinsuke ND.chlim = ND_IFINFO(ifp)->chlim; 139333841545SHajimu UMEMOTO break; 139482cd038dSYoshinobu Inoue case SIOCGIFINFO_IN6: 13952ce62dceSSUZUKI Shinsuke ND = *ND_IFINFO(ifp); 139682cd038dSYoshinobu Inoue break; 1397b9204379SSUZUKI Shinsuke case SIOCSIFINFO_IN6: 1398b9204379SSUZUKI Shinsuke /* 1399b9204379SSUZUKI Shinsuke * used to change host variables from userland. 1400b9204379SSUZUKI Shinsuke * intented for a use on router to reflect RA configurations. 1401b9204379SSUZUKI Shinsuke */ 1402b9204379SSUZUKI Shinsuke /* 0 means 'unspecified' */ 1403b9204379SSUZUKI Shinsuke if (ND.linkmtu != 0) { 1404b9204379SSUZUKI Shinsuke if (ND.linkmtu < IPV6_MMTU || 1405b9204379SSUZUKI Shinsuke ND.linkmtu > IN6_LINKMTU(ifp)) { 1406b9204379SSUZUKI Shinsuke error = EINVAL; 1407b9204379SSUZUKI Shinsuke break; 1408b9204379SSUZUKI Shinsuke } 1409b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->linkmtu = ND.linkmtu; 1410b9204379SSUZUKI Shinsuke } 1411b9204379SSUZUKI Shinsuke 1412b9204379SSUZUKI Shinsuke if (ND.basereachable != 0) { 1413b9204379SSUZUKI Shinsuke int obasereachable = ND_IFINFO(ifp)->basereachable; 1414b9204379SSUZUKI Shinsuke 1415b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->basereachable = ND.basereachable; 1416b9204379SSUZUKI Shinsuke if (ND.basereachable != obasereachable) 1417b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->reachable = 1418b9204379SSUZUKI Shinsuke ND_COMPUTE_RTIME(ND.basereachable); 1419b9204379SSUZUKI Shinsuke } 1420b9204379SSUZUKI Shinsuke if (ND.retrans != 0) 1421b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->retrans = ND.retrans; 1422b9204379SSUZUKI Shinsuke if (ND.chlim != 0) 1423b9204379SSUZUKI Shinsuke ND_IFINFO(ifp)->chlim = ND.chlim; 1424b9204379SSUZUKI Shinsuke /* FALLTHROUGH */ 1425686cdd19SJun-ichiro itojun Hagino case SIOCSIFINFO_FLAGS: 1426a283298cSHiroki Sato { 1427a283298cSHiroki Sato struct ifaddr *ifa; 1428a283298cSHiroki Sato struct in6_ifaddr *ia; 1429a283298cSHiroki Sato 1430a283298cSHiroki Sato if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1431a283298cSHiroki Sato !(ND.flags & ND6_IFF_IFDISABLED)) { 1432a283298cSHiroki Sato /* ifdisabled 1->0 transision */ 1433a283298cSHiroki Sato 1434a283298cSHiroki Sato /* 1435a283298cSHiroki Sato * If the interface is marked as ND6_IFF_IFDISABLED and 1436a283298cSHiroki Sato * has an link-local address with IN6_IFF_DUPLICATED, 1437a283298cSHiroki Sato * do not clear ND6_IFF_IFDISABLED. 1438a283298cSHiroki Sato * See RFC 4862, Section 5.4.5. 1439a283298cSHiroki Sato */ 1440137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1441a283298cSHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1442a283298cSHiroki Sato if (ifa->ifa_addr->sa_family != AF_INET6) 1443a283298cSHiroki Sato continue; 1444a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1445a283298cSHiroki Sato if ((ia->ia6_flags & IN6_IFF_DUPLICATED) && 1446d0bec2c5SHiroki Sato IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 1447a283298cSHiroki Sato break; 1448a283298cSHiroki Sato } 1449137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1450a283298cSHiroki Sato 1451d0bec2c5SHiroki Sato if (ifa != NULL) { 1452d0bec2c5SHiroki Sato /* LLA is duplicated. */ 1453a283298cSHiroki Sato ND.flags |= ND6_IFF_IFDISABLED; 1454a283298cSHiroki Sato log(LOG_ERR, "Cannot enable an interface" 1455a283298cSHiroki Sato " with a link-local address marked" 1456a283298cSHiroki Sato " duplicate.\n"); 1457a283298cSHiroki Sato } else { 1458a283298cSHiroki Sato ND_IFINFO(ifp)->flags &= ~ND6_IFF_IFDISABLED; 1459154d5f73SHiroki Sato if (ifp->if_flags & IFF_UP) 1460a283298cSHiroki Sato in6_if_up(ifp); 1461a283298cSHiroki Sato } 1462a283298cSHiroki Sato } else if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) && 1463a283298cSHiroki Sato (ND.flags & ND6_IFF_IFDISABLED)) { 1464a283298cSHiroki Sato /* ifdisabled 0->1 transision */ 1465a283298cSHiroki Sato /* Mark all IPv6 address as tentative. */ 1466a283298cSHiroki Sato 1467a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED; 1468d0bec2c5SHiroki Sato if ((ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD) == 0) { 1469137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1470d0bec2c5SHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, 1471d0bec2c5SHiroki Sato ifa_link) { 1472d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1473d0bec2c5SHiroki Sato AF_INET6) 1474a283298cSHiroki Sato continue; 1475a283298cSHiroki Sato ia = (struct in6_ifaddr *)ifa; 1476a283298cSHiroki Sato ia->ia6_flags |= IN6_IFF_TENTATIVE; 1477a283298cSHiroki Sato } 1478137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1479a283298cSHiroki Sato } 1480d0bec2c5SHiroki Sato } 1481a283298cSHiroki Sato 1482154d5f73SHiroki Sato if (ND.flags & ND6_IFF_AUTO_LINKLOCAL) { 1483154d5f73SHiroki Sato if (!(ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL)) { 1484a283298cSHiroki Sato /* auto_linklocal 0->1 transision */ 1485a283298cSHiroki Sato 1486a283298cSHiroki Sato /* If no link-local address on ifp, configure */ 1487a283298cSHiroki Sato ND_IFINFO(ifp)->flags |= ND6_IFF_AUTO_LINKLOCAL; 1488a283298cSHiroki Sato in6_ifattach(ifp, NULL); 1489154d5f73SHiroki Sato } else if (!(ND.flags & ND6_IFF_IFDISABLED) && 1490154d5f73SHiroki Sato ifp->if_flags & IFF_UP) { 149177bc4985SHiroki Sato /* 149277bc4985SHiroki Sato * When the IF already has 1493154d5f73SHiroki Sato * ND6_IFF_AUTO_LINKLOCAL, no link-local 1494154d5f73SHiroki Sato * address is assigned, and IFF_UP, try to 1495154d5f73SHiroki Sato * assign one. 149677bc4985SHiroki Sato */ 1497137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1498d0bec2c5SHiroki Sato TAILQ_FOREACH(ifa, &ifp->if_addrhead, 1499d0bec2c5SHiroki Sato ifa_link) { 1500d0bec2c5SHiroki Sato if (ifa->ifa_addr->sa_family != 1501d0bec2c5SHiroki Sato AF_INET6) 150277bc4985SHiroki Sato continue; 150377bc4985SHiroki Sato ia = (struct in6_ifaddr *)ifa; 1504d0bec2c5SHiroki Sato if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia))) 150577bc4985SHiroki Sato break; 150677bc4985SHiroki Sato } 1507137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 1508d0bec2c5SHiroki Sato if (ifa != NULL) 1509d0bec2c5SHiroki Sato /* No LLA is configured. */ 151077bc4985SHiroki Sato in6_ifattach(ifp, NULL); 1511a283298cSHiroki Sato } 1512a283298cSHiroki Sato } 1513154d5f73SHiroki Sato } 15142ce62dceSSUZUKI Shinsuke ND_IFINFO(ifp)->flags = ND.flags; 1515686cdd19SJun-ichiro itojun Hagino break; 15162ce62dceSSUZUKI Shinsuke #undef ND 1517686cdd19SJun-ichiro itojun Hagino case SIOCSNDFLUSH_IN6: /* XXX: the ioctl name is confusing... */ 1518743eee66SSUZUKI Shinsuke /* sync kernel routing table with the default router list */ 1519743eee66SSUZUKI Shinsuke defrouter_reset(); 1520686cdd19SJun-ichiro itojun Hagino defrouter_select(); 152182cd038dSYoshinobu Inoue break; 152282cd038dSYoshinobu Inoue case SIOCSPFXFLUSH_IN6: 152382cd038dSYoshinobu Inoue { 152482cd038dSYoshinobu Inoue /* flush all the prefix advertised by routers */ 152582cd038dSYoshinobu Inoue struct nd_prefix *pr, *next; 152682cd038dSYoshinobu Inoue 15273b0b2840SJohn Baldwin LIST_FOREACH_SAFE(pr, &V_nd_prefix, ndpr_entry, next) { 152833841545SHajimu UMEMOTO struct in6_ifaddr *ia, *ia_next; 152933841545SHajimu UMEMOTO 153033841545SHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) 153133841545SHajimu UMEMOTO continue; /* XXX */ 153233841545SHajimu UMEMOTO 153333841545SHajimu UMEMOTO /* do we really have to remove addresses as well? */ 1534d1da0a06SRobert Watson /* XXXRW: in6_ifaddrhead locking. */ 153580af0152SRobert Watson TAILQ_FOREACH_SAFE(ia, &V_in6_ifaddrhead, ia_link, 153680af0152SRobert Watson ia_next) { 153733841545SHajimu UMEMOTO if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) 153833841545SHajimu UMEMOTO continue; 153933841545SHajimu UMEMOTO 154033841545SHajimu UMEMOTO if (ia->ia6_ndpr == pr) 154133841545SHajimu UMEMOTO in6_purgeaddr(&ia->ia_ifa); 154233841545SHajimu UMEMOTO } 154382cd038dSYoshinobu Inoue prelist_remove(pr); 154482cd038dSYoshinobu Inoue } 154582cd038dSYoshinobu Inoue break; 154682cd038dSYoshinobu Inoue } 154782cd038dSYoshinobu Inoue case SIOCSRTRFLUSH_IN6: 154882cd038dSYoshinobu Inoue { 154982cd038dSYoshinobu Inoue /* flush all the default routers */ 155082cd038dSYoshinobu Inoue struct nd_defrouter *dr, *next; 155182cd038dSYoshinobu Inoue 1552743eee66SSUZUKI Shinsuke defrouter_reset(); 15533b0b2840SJohn Baldwin TAILQ_FOREACH_SAFE(dr, &V_nd_defrouter, dr_entry, next) { 155482cd038dSYoshinobu Inoue defrtrlist_del(dr); 155582cd038dSYoshinobu Inoue } 1556743eee66SSUZUKI Shinsuke defrouter_select(); 155782cd038dSYoshinobu Inoue break; 155882cd038dSYoshinobu Inoue } 155982cd038dSYoshinobu Inoue case SIOCGNBRINFO_IN6: 156082cd038dSYoshinobu Inoue { 15616e6b3f7cSQing Li struct llentry *ln; 156282cd038dSYoshinobu Inoue struct in6_addr nb_addr = nbi->addr; /* make local for safety */ 156382cd038dSYoshinobu Inoue 1564a1f7e5f8SHajimu UMEMOTO if ((error = in6_setscope(&nb_addr, ifp, NULL)) != 0) 1565a1f7e5f8SHajimu UMEMOTO return (error); 156682cd038dSYoshinobu Inoue 156773cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 15686e6b3f7cSQing Li ln = nd6_lookup(&nb_addr, 0, ifp); 156973cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 15706e6b3f7cSQing Li 15716e6b3f7cSQing Li if (ln == NULL) { 157282cd038dSYoshinobu Inoue error = EINVAL; 157382cd038dSYoshinobu Inoue break; 157482cd038dSYoshinobu Inoue } 157582cd038dSYoshinobu Inoue nbi->state = ln->ln_state; 15766e6b3f7cSQing Li nbi->asked = ln->la_asked; 157782cd038dSYoshinobu Inoue nbi->isrouter = ln->ln_router; 15785a041915SHiroki Sato if (ln->la_expire == 0) 15795a041915SHiroki Sato nbi->expire = 0; 15805a041915SHiroki Sato else 15815a041915SHiroki Sato nbi->expire = ln->la_expire + 15825a041915SHiroki Sato (time_second - time_uptime); 15836e6b3f7cSQing Li LLE_RUNLOCK(ln); 158482cd038dSYoshinobu Inoue break; 158582cd038dSYoshinobu Inoue } 1586686cdd19SJun-ichiro itojun Hagino case SIOCGDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1587603724d3SBjoern A. Zeeb ndif->ifindex = V_nd6_defifindex; 1588686cdd19SJun-ichiro itojun Hagino break; 1589686cdd19SJun-ichiro itojun Hagino case SIOCSDEFIFACE_IN6: /* XXX: should be implemented as a sysctl? */ 1590686cdd19SJun-ichiro itojun Hagino return (nd6_setdefaultiface(ndif->ifindex)); 159182cd038dSYoshinobu Inoue } 159282cd038dSYoshinobu Inoue return (error); 159382cd038dSYoshinobu Inoue } 159482cd038dSYoshinobu Inoue 159582cd038dSYoshinobu Inoue /* 15960e2dcee6SAlexander V. Chernikov * Calculates new isRouter value based on provided parameters and 15970e2dcee6SAlexander V. Chernikov * returns it. 15980e2dcee6SAlexander V. Chernikov */ 15990e2dcee6SAlexander V. Chernikov static int 16000e2dcee6SAlexander V. Chernikov nd6_is_router(int type, int code, int is_new, int old_addr, int new_addr, 16010e2dcee6SAlexander V. Chernikov int ln_router) 16020e2dcee6SAlexander V. Chernikov { 16030e2dcee6SAlexander V. Chernikov 16040e2dcee6SAlexander V. Chernikov /* 16050e2dcee6SAlexander V. Chernikov * ICMP6 type dependent behavior. 16060e2dcee6SAlexander V. Chernikov * 16070e2dcee6SAlexander V. Chernikov * NS: clear IsRouter if new entry 16080e2dcee6SAlexander V. Chernikov * RS: clear IsRouter 16090e2dcee6SAlexander V. Chernikov * RA: set IsRouter if there's lladdr 16100e2dcee6SAlexander V. Chernikov * redir: clear IsRouter if new entry 16110e2dcee6SAlexander V. Chernikov * 16120e2dcee6SAlexander V. Chernikov * RA case, (1): 16130e2dcee6SAlexander V. Chernikov * The spec says that we must set IsRouter in the following cases: 16140e2dcee6SAlexander V. Chernikov * - If lladdr exist, set IsRouter. This means (1-5). 16150e2dcee6SAlexander V. Chernikov * - If it is old entry (!newentry), set IsRouter. This means (7). 16160e2dcee6SAlexander V. Chernikov * So, based on the spec, in (1-5) and (7) cases we must set IsRouter. 16170e2dcee6SAlexander V. Chernikov * A quetion arises for (1) case. (1) case has no lladdr in the 16180e2dcee6SAlexander V. Chernikov * neighbor cache, this is similar to (6). 16190e2dcee6SAlexander V. Chernikov * This case is rare but we figured that we MUST NOT set IsRouter. 16200e2dcee6SAlexander V. Chernikov * 162141a31e78SAlexander V. Chernikov * is_new old_addr new_addr NS RS RA redir 16220e2dcee6SAlexander V. Chernikov * D R 162341a31e78SAlexander V. Chernikov * 0 n n (1) c ? s 162441a31e78SAlexander V. Chernikov * 0 y n (2) c s s 162541a31e78SAlexander V. Chernikov * 0 n y (3) c s s 162641a31e78SAlexander V. Chernikov * 0 y y (4) c s s 162741a31e78SAlexander V. Chernikov * 0 y y (5) c s s 162841a31e78SAlexander V. Chernikov * 1 -- n (6) c c c s 162941a31e78SAlexander V. Chernikov * 1 -- y (7) c c s c s 16300e2dcee6SAlexander V. Chernikov * 16310e2dcee6SAlexander V. Chernikov * (c=clear s=set) 16320e2dcee6SAlexander V. Chernikov */ 16330e2dcee6SAlexander V. Chernikov switch (type & 0xff) { 16340e2dcee6SAlexander V. Chernikov case ND_NEIGHBOR_SOLICIT: 16350e2dcee6SAlexander V. Chernikov /* 16360e2dcee6SAlexander V. Chernikov * New entry must have is_router flag cleared. 16370e2dcee6SAlexander V. Chernikov */ 16380e2dcee6SAlexander V. Chernikov if (is_new) /* (6-7) */ 16390e2dcee6SAlexander V. Chernikov ln_router = 0; 16400e2dcee6SAlexander V. Chernikov break; 16410e2dcee6SAlexander V. Chernikov case ND_REDIRECT: 16420e2dcee6SAlexander V. Chernikov /* 16430e2dcee6SAlexander V. Chernikov * If the icmp is a redirect to a better router, always set the 16440e2dcee6SAlexander V. Chernikov * is_router flag. Otherwise, if the entry is newly created, 16450e2dcee6SAlexander V. Chernikov * clear the flag. [RFC 2461, sec 8.3] 16460e2dcee6SAlexander V. Chernikov */ 16470e2dcee6SAlexander V. Chernikov if (code == ND_REDIRECT_ROUTER) 16480e2dcee6SAlexander V. Chernikov ln_router = 1; 16490e2dcee6SAlexander V. Chernikov else { 16500e2dcee6SAlexander V. Chernikov if (is_new) /* (6-7) */ 16510e2dcee6SAlexander V. Chernikov ln_router = 0; 16520e2dcee6SAlexander V. Chernikov } 16530e2dcee6SAlexander V. Chernikov break; 16540e2dcee6SAlexander V. Chernikov case ND_ROUTER_SOLICIT: 16550e2dcee6SAlexander V. Chernikov /* 16560e2dcee6SAlexander V. Chernikov * is_router flag must always be cleared. 16570e2dcee6SAlexander V. Chernikov */ 16580e2dcee6SAlexander V. Chernikov ln_router = 0; 16590e2dcee6SAlexander V. Chernikov break; 16600e2dcee6SAlexander V. Chernikov case ND_ROUTER_ADVERT: 16610e2dcee6SAlexander V. Chernikov /* 16620e2dcee6SAlexander V. Chernikov * Mark an entry with lladdr as a router. 16630e2dcee6SAlexander V. Chernikov */ 16640e2dcee6SAlexander V. Chernikov if ((!is_new && (old_addr || new_addr)) || /* (2-5) */ 16650e2dcee6SAlexander V. Chernikov (is_new && new_addr)) { /* (7) */ 16660e2dcee6SAlexander V. Chernikov ln_router = 1; 16670e2dcee6SAlexander V. Chernikov } 16680e2dcee6SAlexander V. Chernikov break; 16690e2dcee6SAlexander V. Chernikov } 16700e2dcee6SAlexander V. Chernikov 16710e2dcee6SAlexander V. Chernikov return (ln_router); 16720e2dcee6SAlexander V. Chernikov } 16730e2dcee6SAlexander V. Chernikov 16740e2dcee6SAlexander V. Chernikov /* 167582cd038dSYoshinobu Inoue * Create neighbor cache entry and cache link-layer address, 167682cd038dSYoshinobu Inoue * on reception of inbound ND6 packets. (RS/RA/NS/redirect) 16771272577eSXin LI * 16781272577eSXin LI * type - ICMP6 type 16791272577eSXin LI * code - type dependent information 16806e6b3f7cSQing Li * 168182cd038dSYoshinobu Inoue */ 16820e2dcee6SAlexander V. Chernikov void 16831272577eSXin LI nd6_cache_lladdr(struct ifnet *ifp, struct in6_addr *from, char *lladdr, 16841272577eSXin LI int lladdrlen, int type, int code) 168582cd038dSYoshinobu Inoue { 16865a255516SAlexander V. Chernikov struct llentry *ln = NULL, *ln_tmp; 168782cd038dSYoshinobu Inoue int is_newentry; 168882cd038dSYoshinobu Inoue int do_update; 168982cd038dSYoshinobu Inoue int olladdr; 169082cd038dSYoshinobu Inoue int llchange; 169168352503SBjoern A. Zeeb int flags; 16923d3728e9SQing Li uint16_t router = 0; 16936e6b3f7cSQing Li struct sockaddr_in6 sin6; 1694fd14c50bSKip Macy struct mbuf *chain = NULL; 16956e6b3f7cSQing Li 16966e6b3f7cSQing Li IF_AFDATA_UNLOCK_ASSERT(ifp); 169782cd038dSYoshinobu Inoue 169839e19560SBjoern A. Zeeb KASSERT(ifp != NULL, ("%s: ifp == NULL", __func__)); 169939e19560SBjoern A. Zeeb KASSERT(from != NULL, ("%s: from == NULL", __func__)); 170082cd038dSYoshinobu Inoue 170182cd038dSYoshinobu Inoue /* nothing must be updated for unspecified address */ 170282cd038dSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED(from)) 17030e2dcee6SAlexander V. Chernikov return; 170482cd038dSYoshinobu Inoue 170582cd038dSYoshinobu Inoue /* 170682cd038dSYoshinobu Inoue * Validation about ifp->if_addrlen and lladdrlen must be done in 170782cd038dSYoshinobu Inoue * the caller. 170882cd038dSYoshinobu Inoue * 170982cd038dSYoshinobu Inoue * XXX If the link does not have link-layer adderss, what should 171082cd038dSYoshinobu Inoue * we do? (ifp->if_addrlen == 0) 171182cd038dSYoshinobu Inoue * Spec says nothing in sections for RA, RS and NA. There's small 171282cd038dSYoshinobu Inoue * description on it in NS section (RFC 2461 7.2.3). 171382cd038dSYoshinobu Inoue */ 171468352503SBjoern A. Zeeb flags = lladdr ? ND6_EXCLUSIVE : 0; 1715ea0c3776SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 17166e6b3f7cSQing Li ln = nd6_lookup(from, flags, ifp); 1717ea0c3776SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 17185a255516SAlexander V. Chernikov is_newentry = 0; 17196e6b3f7cSQing Li if (ln == NULL) { 172068352503SBjoern A. Zeeb flags |= ND6_EXCLUSIVE; 17215a255516SAlexander V. Chernikov ln = nd6_alloc(from, 0, ifp); 17225a255516SAlexander V. Chernikov if (ln == NULL) 17230e2dcee6SAlexander V. Chernikov return; 1724*501adf01SAlexander V. Chernikov 1725*501adf01SAlexander V. Chernikov /* 1726*501adf01SAlexander V. Chernikov * Since we already know all the data for the new entry, 1727*501adf01SAlexander V. Chernikov * fill it before insertion. 1728*501adf01SAlexander V. Chernikov */ 1729*501adf01SAlexander V. Chernikov if (lladdr != NULL) { 1730*501adf01SAlexander V. Chernikov bcopy(lladdr, &ln->ll_addr, ifp->if_addrlen); 1731*501adf01SAlexander V. Chernikov ln->la_flags |= LLE_VALID; 1732*501adf01SAlexander V. Chernikov ln->ln_state = ND6_LLINFO_STALE; 1733*501adf01SAlexander V. Chernikov } 17345a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 17355a255516SAlexander V. Chernikov LLE_WLOCK(ln); 17365a255516SAlexander V. Chernikov /* Prefer any existing lle over newly-created one */ 17375a255516SAlexander V. Chernikov ln_tmp = nd6_lookup(from, ND6_EXCLUSIVE, ifp); 17385a255516SAlexander V. Chernikov if (ln_tmp == NULL) 17395a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 17405a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 17415a255516SAlexander V. Chernikov if (ln_tmp == NULL) 17425a255516SAlexander V. Chernikov /* No existing lle, mark as new entry */ 174382cd038dSYoshinobu Inoue is_newentry = 1; 17445a255516SAlexander V. Chernikov else { 17455a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), ln); 17465a255516SAlexander V. Chernikov ln = ln_tmp; 17475a255516SAlexander V. Chernikov ln_tmp = NULL; 17485a255516SAlexander V. Chernikov } 17495a255516SAlexander V. Chernikov } 175033841545SHajimu UMEMOTO /* do nothing if static ndp is set */ 17515a255516SAlexander V. Chernikov if ((ln->la_flags & LLE_STATIC)) { 17520e2dcee6SAlexander V. Chernikov if (flags & ND6_EXCLUSIVE) 17530e2dcee6SAlexander V. Chernikov LLE_WUNLOCK(ln); 17540e2dcee6SAlexander V. Chernikov else 17550e2dcee6SAlexander V. Chernikov LLE_RUNLOCK(ln); 17560e2dcee6SAlexander V. Chernikov return; 17573d3728e9SQing Li } 175882cd038dSYoshinobu Inoue 17596e6b3f7cSQing Li olladdr = (ln->la_flags & LLE_VALID) ? 1 : 0; 176082cd038dSYoshinobu Inoue if (olladdr && lladdr) { 17616e6b3f7cSQing Li llchange = bcmp(lladdr, &ln->ll_addr, 17626e6b3f7cSQing Li ifp->if_addrlen); 176341a31e78SAlexander V. Chernikov } else if (!olladdr && lladdr) 176441a31e78SAlexander V. Chernikov llchange = 1; 176541a31e78SAlexander V. Chernikov else 176682cd038dSYoshinobu Inoue llchange = 0; 176782cd038dSYoshinobu Inoue 176882cd038dSYoshinobu Inoue /* 176982cd038dSYoshinobu Inoue * newentry olladdr lladdr llchange (*=record) 177082cd038dSYoshinobu Inoue * 0 n n -- (1) 177182cd038dSYoshinobu Inoue * 0 y n -- (2) 177241a31e78SAlexander V. Chernikov * 0 n y y (3) * STALE 177382cd038dSYoshinobu Inoue * 0 y y n (4) * 177482cd038dSYoshinobu Inoue * 0 y y y (5) * STALE 177582cd038dSYoshinobu Inoue * 1 -- n -- (6) NOSTATE(= PASSIVE) 177682cd038dSYoshinobu Inoue * 1 -- y -- (7) * STALE 177782cd038dSYoshinobu Inoue */ 177882cd038dSYoshinobu Inoue 1779*501adf01SAlexander V. Chernikov do_update = 0; 1780*501adf01SAlexander V. Chernikov if (!is_newentry && llchange != 0) 1781*501adf01SAlexander V. Chernikov do_update = 1; /* (3,5) */ 1782*501adf01SAlexander V. Chernikov 178382cd038dSYoshinobu Inoue if (lladdr) { /* (3-5) and (7) */ 178482cd038dSYoshinobu Inoue /* 178582cd038dSYoshinobu Inoue * Record source link-layer address 178682cd038dSYoshinobu Inoue * XXX is it dependent to ifp->if_type? 178782cd038dSYoshinobu Inoue */ 17886e6b3f7cSQing Li bcopy(lladdr, &ln->ll_addr, ifp->if_addrlen); 17896e6b3f7cSQing Li ln->la_flags |= LLE_VALID; 1790*501adf01SAlexander V. Chernikov ln->ln_state = ND6_LLINFO_STALE; 179182cd038dSYoshinobu Inoue 1792*501adf01SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 179382cd038dSYoshinobu Inoue 179482cd038dSYoshinobu Inoue if (do_update) { 1795d7968c29SAlexander V. Chernikov if (ln->la_hold != NULL) 1796d7968c29SAlexander V. Chernikov nd6_grab_holdchain(ln, &chain, &sin6); 179782cd038dSYoshinobu Inoue } 179882cd038dSYoshinobu Inoue } 179982cd038dSYoshinobu Inoue 18000e2dcee6SAlexander V. Chernikov /* Calculates new router status */ 18010e2dcee6SAlexander V. Chernikov router = nd6_is_router(type, code, is_newentry, olladdr, 18020e2dcee6SAlexander V. Chernikov lladdr != NULL ? 1 : 0, ln->ln_router); 180382cd038dSYoshinobu Inoue 18040e2dcee6SAlexander V. Chernikov ln->ln_router = router; 18050e2dcee6SAlexander V. Chernikov /* Mark non-router redirects with special flag */ 18060e2dcee6SAlexander V. Chernikov if ((type & 0xFF) == ND_REDIRECT && code != ND_REDIRECT_ROUTER) 18070e2dcee6SAlexander V. Chernikov ln->la_flags |= LLE_REDIRECT; 1808c2b3a02bSKip Macy 18096e6b3f7cSQing Li if (flags & ND6_EXCLUSIVE) 18106e6b3f7cSQing Li LLE_WUNLOCK(ln); 18116e6b3f7cSQing Li else 18126e6b3f7cSQing Li LLE_RUNLOCK(ln); 18130e2dcee6SAlexander V. Chernikov 1814d7968c29SAlexander V. Chernikov if (chain != NULL) 1815d7968c29SAlexander V. Chernikov nd6_flush_holdchain(ifp, ifp, chain, &sin6); 18166e6b3f7cSQing Li 1817554bf4aaSHajimu UMEMOTO /* 1818554bf4aaSHajimu UMEMOTO * When the link-layer address of a router changes, select the 1819554bf4aaSHajimu UMEMOTO * best router again. In particular, when the neighbor entry is newly 1820554bf4aaSHajimu UMEMOTO * created, it might affect the selection policy. 1821554bf4aaSHajimu UMEMOTO * Question: can we restrict the first condition to the "is_newentry" 1822554bf4aaSHajimu UMEMOTO * case? 1823554bf4aaSHajimu UMEMOTO * XXX: when we hear an RA from a new router with the link-layer 1824554bf4aaSHajimu UMEMOTO * address option, defrouter_select() is called twice, since 1825554bf4aaSHajimu UMEMOTO * defrtrlist_update called the function as well. However, I believe 1826554bf4aaSHajimu UMEMOTO * we can compromise the overhead, since it only happens the first 1827554bf4aaSHajimu UMEMOTO * time. 1828554bf4aaSHajimu UMEMOTO * XXX: although defrouter_select() should not have a bad effect 1829554bf4aaSHajimu UMEMOTO * for those are not autoconfigured hosts, we explicitly avoid such 1830554bf4aaSHajimu UMEMOTO * cases for safety. 1831554bf4aaSHajimu UMEMOTO */ 1832*501adf01SAlexander V. Chernikov if ((do_update || is_newentry) && router && 1833a283298cSHiroki Sato ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) { 18346e6b3f7cSQing Li /* 18356e6b3f7cSQing Li * guaranteed recursion 18366e6b3f7cSQing Li */ 1837554bf4aaSHajimu UMEMOTO defrouter_select(); 18386e6b3f7cSQing Li } 183982cd038dSYoshinobu Inoue } 184082cd038dSYoshinobu Inoue 184182cd038dSYoshinobu Inoue static void 18428b615593SMarko Zec nd6_slowtimo(void *arg) 184382cd038dSYoshinobu Inoue { 18448b615593SMarko Zec CURVNET_SET((struct vnet *) arg); 184533841545SHajimu UMEMOTO struct nd_ifinfo *nd6if; 184631b1bfe1SHajimu UMEMOTO struct ifnet *ifp; 184782cd038dSYoshinobu Inoue 1848603724d3SBjoern A. Zeeb callout_reset(&V_nd6_slowtimo_ch, ND6_SLOWTIMER_INTERVAL * hz, 1849f6dfe47aSMarko Zec nd6_slowtimo, curvnet); 185077dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 1851e6abaf91SGleb Smirnoff TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 18520de0dd9bSHiroki Sato if (ifp->if_afdata[AF_INET6] == NULL) 18530de0dd9bSHiroki Sato continue; 185431b1bfe1SHajimu UMEMOTO nd6if = ND_IFINFO(ifp); 185582cd038dSYoshinobu Inoue if (nd6if->basereachable && /* already initialized */ 185682cd038dSYoshinobu Inoue (nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) { 185782cd038dSYoshinobu Inoue /* 185882cd038dSYoshinobu Inoue * Since reachable time rarely changes by router 185982cd038dSYoshinobu Inoue * advertisements, we SHOULD insure that a new random 186082cd038dSYoshinobu Inoue * value gets recomputed at least once every few hours. 186182cd038dSYoshinobu Inoue * (RFC 2461, 6.3.4) 186282cd038dSYoshinobu Inoue */ 1863603724d3SBjoern A. Zeeb nd6if->recalctm = V_nd6_recalc_reachtm_interval; 186482cd038dSYoshinobu Inoue nd6if->reachable = ND_COMPUTE_RTIME(nd6if->basereachable); 186582cd038dSYoshinobu Inoue } 186682cd038dSYoshinobu Inoue } 186777dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 18688b615593SMarko Zec CURVNET_RESTORE(); 186982cd038dSYoshinobu Inoue } 187082cd038dSYoshinobu Inoue 1871d7968c29SAlexander V. Chernikov void 1872d7968c29SAlexander V. Chernikov nd6_grab_holdchain(struct llentry *ln, struct mbuf **chain, 1873d7968c29SAlexander V. Chernikov struct sockaddr_in6 *sin6) 1874d7968c29SAlexander V. Chernikov { 1875d7968c29SAlexander V. Chernikov 1876d7968c29SAlexander V. Chernikov LLE_WLOCK_ASSERT(ln); 1877d7968c29SAlexander V. Chernikov 1878d7968c29SAlexander V. Chernikov *chain = ln->la_hold; 1879d7968c29SAlexander V. Chernikov ln->la_hold = NULL; 1880314294deSAlexander V. Chernikov lltable_fill_sa_entry(ln, (struct sockaddr *)sin6); 1881d7968c29SAlexander V. Chernikov 1882d7968c29SAlexander V. Chernikov if (ln->ln_state == ND6_LLINFO_STALE) { 1883d7968c29SAlexander V. Chernikov 1884d7968c29SAlexander V. Chernikov /* 1885d7968c29SAlexander V. Chernikov * The first time we send a packet to a 1886d7968c29SAlexander V. Chernikov * neighbor whose entry is STALE, we have 1887d7968c29SAlexander V. Chernikov * to change the state to DELAY and a sets 1888d7968c29SAlexander V. Chernikov * a timer to expire in DELAY_FIRST_PROBE_TIME 1889d7968c29SAlexander V. Chernikov * seconds to ensure do neighbor unreachability 1890d7968c29SAlexander V. Chernikov * detection on expiration. 1891d7968c29SAlexander V. Chernikov * (RFC 2461 7.3.3) 1892d7968c29SAlexander V. Chernikov */ 1893d7968c29SAlexander V. Chernikov ln->la_asked = 0; 1894d7968c29SAlexander V. Chernikov ln->ln_state = ND6_LLINFO_DELAY; 1895d7968c29SAlexander V. Chernikov nd6_llinfo_settimer_locked(ln, (long)V_nd6_delay * hz); 1896d7968c29SAlexander V. Chernikov } 1897d7968c29SAlexander V. Chernikov } 1898d7968c29SAlexander V. Chernikov 18991fe201c3SAlexander V. Chernikov int 1900d7968c29SAlexander V. Chernikov nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m, 1901d7968c29SAlexander V. Chernikov struct sockaddr_in6 *dst) 1902d7968c29SAlexander V. Chernikov { 1903d7968c29SAlexander V. Chernikov int error; 1904d7968c29SAlexander V. Chernikov int ip6len; 1905d7968c29SAlexander V. Chernikov struct ip6_hdr *ip6; 1906d7968c29SAlexander V. Chernikov struct m_tag *mtag; 1907d7968c29SAlexander V. Chernikov 1908d7968c29SAlexander V. Chernikov #ifdef MAC 1909d7968c29SAlexander V. Chernikov mac_netinet6_nd6_send(ifp, m); 1910d7968c29SAlexander V. Chernikov #endif 1911d7968c29SAlexander V. Chernikov 1912d7968c29SAlexander V. Chernikov /* 1913d7968c29SAlexander V. Chernikov * If called from nd6_ns_output() (NS), nd6_na_output() (NA), 1914d7968c29SAlexander V. Chernikov * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA 1915d7968c29SAlexander V. Chernikov * as handled by rtsol and rtadvd), mbufs will be tagged for SeND 1916d7968c29SAlexander V. Chernikov * to be diverted to user space. When re-injected into the kernel, 1917d7968c29SAlexander V. Chernikov * send_output() will directly dispatch them to the outgoing interface. 1918d7968c29SAlexander V. Chernikov */ 1919d7968c29SAlexander V. Chernikov if (send_sendso_input_hook != NULL) { 1920d7968c29SAlexander V. Chernikov mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL); 1921d7968c29SAlexander V. Chernikov if (mtag != NULL) { 1922d7968c29SAlexander V. Chernikov ip6 = mtod(m, struct ip6_hdr *); 1923d7968c29SAlexander V. Chernikov ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 1924d7968c29SAlexander V. Chernikov /* Use the SEND socket */ 1925d7968c29SAlexander V. Chernikov error = send_sendso_input_hook(m, ifp, SND_OUT, 1926d7968c29SAlexander V. Chernikov ip6len); 1927d7968c29SAlexander V. Chernikov /* -1 == no app on SEND socket */ 1928d7968c29SAlexander V. Chernikov if (error == 0 || error != -1) 1929d7968c29SAlexander V. Chernikov return (error); 1930d7968c29SAlexander V. Chernikov } 1931d7968c29SAlexander V. Chernikov } 1932d7968c29SAlexander V. Chernikov 1933d7968c29SAlexander V. Chernikov m_clrprotoflags(m); /* Avoid confusing lower layers. */ 1934d7968c29SAlexander V. Chernikov IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL, 1935d7968c29SAlexander V. Chernikov mtod(m, struct ip6_hdr *)); 1936d7968c29SAlexander V. Chernikov 1937d7968c29SAlexander V. Chernikov if ((ifp->if_flags & IFF_LOOPBACK) == 0) 1938d7968c29SAlexander V. Chernikov origifp = ifp; 1939d7968c29SAlexander V. Chernikov 1940d7968c29SAlexander V. Chernikov error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, NULL); 1941d7968c29SAlexander V. Chernikov return (error); 1942d7968c29SAlexander V. Chernikov } 1943d7968c29SAlexander V. Chernikov 1944f6990c4eSAlexander V. Chernikov /* 19451fe201c3SAlexander V. Chernikov * Do L2 address resolution for @sa_dst address. Stores found 19461fe201c3SAlexander V. Chernikov * address in @desten buffer. Copy of lle ln_flags can be also 19471fe201c3SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 19481fe201c3SAlexander V. Chernikov * 19491fe201c3SAlexander V. Chernikov * If destination LLE does not exists or lle state modification 19501fe201c3SAlexander V. Chernikov * is required, call "slow" version. 19511fe201c3SAlexander V. Chernikov * 19521fe201c3SAlexander V. Chernikov * Return values: 19531fe201c3SAlexander V. Chernikov * - 0 on success (address copied to buffer). 19541fe201c3SAlexander V. Chernikov * - EWOULDBLOCK (no local error, but address is still unresolved) 19551fe201c3SAlexander V. Chernikov * - other errors (alloc failure, etc) 1956f6990c4eSAlexander V. Chernikov */ 195782cd038dSYoshinobu Inoue int 19581fe201c3SAlexander V. Chernikov nd6_resolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 19591fe201c3SAlexander V. Chernikov const struct sockaddr *sa_dst, u_char *desten, uint32_t *pflags) 196082cd038dSYoshinobu Inoue { 1961f6990c4eSAlexander V. Chernikov struct llentry *ln = NULL; 19621fe201c3SAlexander V. Chernikov const struct sockaddr_in6 *dst6; 19631fe201c3SAlexander V. Chernikov 19641fe201c3SAlexander V. Chernikov if (pflags != NULL) 19651fe201c3SAlexander V. Chernikov *pflags = 0; 19661fe201c3SAlexander V. Chernikov 19671fe201c3SAlexander V. Chernikov dst6 = (const struct sockaddr_in6 *)sa_dst; 19686e6b3f7cSQing Li 1969f6990c4eSAlexander V. Chernikov /* discard the packet if IPv6 operation is disabled on the interface */ 1970f6990c4eSAlexander V. Chernikov if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)) { 1971f6990c4eSAlexander V. Chernikov m_freem(m); 1972f6990c4eSAlexander V. Chernikov return (ENETDOWN); /* better error? */ 1973f6990c4eSAlexander V. Chernikov } 1974f6990c4eSAlexander V. Chernikov 19751fe201c3SAlexander V. Chernikov if (m != NULL && m->m_flags & M_MCAST) { 19761fe201c3SAlexander V. Chernikov switch (ifp->if_type) { 19771fe201c3SAlexander V. Chernikov case IFT_ETHER: 19781fe201c3SAlexander V. Chernikov case IFT_FDDI: 19791fe201c3SAlexander V. Chernikov case IFT_L2VLAN: 19801fe201c3SAlexander V. Chernikov case IFT_IEEE80211: 19811fe201c3SAlexander V. Chernikov case IFT_BRIDGE: 19821fe201c3SAlexander V. Chernikov case IFT_ISO88025: 19831fe201c3SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(&dst6->sin6_addr, 19841fe201c3SAlexander V. Chernikov desten); 19851fe201c3SAlexander V. Chernikov return (0); 19861fe201c3SAlexander V. Chernikov default: 19871fe201c3SAlexander V. Chernikov m_freem(m); 19881fe201c3SAlexander V. Chernikov return (EAFNOSUPPORT); 19891fe201c3SAlexander V. Chernikov } 19901fe201c3SAlexander V. Chernikov } 1991f6990c4eSAlexander V. Chernikov 1992f6990c4eSAlexander V. Chernikov IF_AFDATA_RLOCK(ifp); 19931fe201c3SAlexander V. Chernikov ln = nd6_lookup(&dst6->sin6_addr, 0, ifp); 1994f6990c4eSAlexander V. Chernikov IF_AFDATA_RUNLOCK(ifp); 1995f6990c4eSAlexander V. Chernikov 1996f6990c4eSAlexander V. Chernikov /* 1997f6990c4eSAlexander V. Chernikov * Perform fast path for the following cases: 1998f6990c4eSAlexander V. Chernikov * 1) lle state is REACHABLE 1999*501adf01SAlexander V. Chernikov * 2) lle state is DELAY (NS message sent) 2000f6990c4eSAlexander V. Chernikov * 2001f6990c4eSAlexander V. Chernikov * Every other case involves lle modification, so we handle 2002f6990c4eSAlexander V. Chernikov * them separately. 2003f6990c4eSAlexander V. Chernikov */ 2004f6990c4eSAlexander V. Chernikov if (ln == NULL || (ln->ln_state != ND6_LLINFO_REACHABLE && 2005f6990c4eSAlexander V. Chernikov ln->ln_state != ND6_LLINFO_DELAY)) { 2006f6990c4eSAlexander V. Chernikov /* Fall back to slow processing path */ 2007f6990c4eSAlexander V. Chernikov if (ln != NULL) 2008f6990c4eSAlexander V. Chernikov LLE_RUNLOCK(ln); 20091fe201c3SAlexander V. Chernikov return (nd6_resolve_slow(ifp, m, dst6, desten, pflags)); 2010f6990c4eSAlexander V. Chernikov } 2011f6990c4eSAlexander V. Chernikov 2012f6990c4eSAlexander V. Chernikov 20131fe201c3SAlexander V. Chernikov bcopy(&ln->ll_addr, desten, ifp->if_addrlen); 20141fe201c3SAlexander V. Chernikov if (pflags != NULL) 20151fe201c3SAlexander V. Chernikov *pflags = ln->la_flags; 20161fe201c3SAlexander V. Chernikov LLE_RUNLOCK(ln); 20171fe201c3SAlexander V. Chernikov return (0); 20186e6b3f7cSQing Li } 20196e6b3f7cSQing Li 20206e6b3f7cSQing Li 20216e6b3f7cSQing Li /* 20221fe201c3SAlexander V. Chernikov * Do L2 address resolution for @sa_dst address. Stores found 20231fe201c3SAlexander V. Chernikov * address in @desten buffer. Copy of lle ln_flags can be also 20241fe201c3SAlexander V. Chernikov * saved in @pflags if @pflags is non-NULL. 20256e6b3f7cSQing Li * 20261fe201c3SAlexander V. Chernikov * Heavy version. 20271fe201c3SAlexander V. Chernikov * Function assume that destination LLE does not exist, 20281fe201c3SAlexander V. Chernikov * is invalid or stale, so ND6_EXCLUSIVE lock needs to be acquired. 20296e6b3f7cSQing Li */ 2030d7968c29SAlexander V. Chernikov static int 20311fe201c3SAlexander V. Chernikov nd6_resolve_slow(struct ifnet *ifp, struct mbuf *m, 20321fe201c3SAlexander V. Chernikov const struct sockaddr_in6 *dst, u_char *desten, uint32_t *pflags) 20336e6b3f7cSQing Li { 20345a255516SAlexander V. Chernikov struct llentry *lle = NULL, *lle_tmp; 203582cd038dSYoshinobu Inoue 203682cd038dSYoshinobu Inoue /* 203782cd038dSYoshinobu Inoue * Address resolution or Neighbor Unreachability Detection 203882cd038dSYoshinobu Inoue * for the next hop. 203982cd038dSYoshinobu Inoue * At this point, the destination of the packet must be a unicast 204082cd038dSYoshinobu Inoue * or an anycast address(i.e. not a multicast). 204182cd038dSYoshinobu Inoue */ 2042f6990c4eSAlexander V. Chernikov if (lle == NULL) { 2043c445d252SAdrian Chadd IF_AFDATA_RLOCK(ifp); 2044f6990c4eSAlexander V. Chernikov lle = nd6_lookup(&dst->sin6_addr, ND6_EXCLUSIVE, ifp); 2045c445d252SAdrian Chadd IF_AFDATA_RUNLOCK(ifp); 2046f6990c4eSAlexander V. Chernikov if ((lle == NULL) && nd6_is_addr_neighbor(dst, ifp)) { 2047686cdd19SJun-ichiro itojun Hagino /* 2048686cdd19SJun-ichiro itojun Hagino * Since nd6_is_addr_neighbor() internally calls nd6_lookup(), 2049686cdd19SJun-ichiro itojun Hagino * the condition below is not very efficient. But we believe 2050686cdd19SJun-ichiro itojun Hagino * it is tolerable, because this should be a rare case. 2051686cdd19SJun-ichiro itojun Hagino */ 20525a255516SAlexander V. Chernikov lle = nd6_alloc(&dst->sin6_addr, 0, ifp); 2053f6990c4eSAlexander V. Chernikov if (lle == NULL) { 20541d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 2055686cdd19SJun-ichiro itojun Hagino log(LOG_DEBUG, 2056686cdd19SJun-ichiro itojun Hagino "nd6_output: can't allocate llinfo for %s " 2057bbd8aebaSQing Li "(ln=%p)\n", 2058f6990c4eSAlexander V. Chernikov ip6_sprintf(ip6buf, &dst->sin6_addr), lle); 20599dffa6a3SAlexander V. Chernikov m_freem(m); 20609dffa6a3SAlexander V. Chernikov return (ENOBUFS); 206182cd038dSYoshinobu Inoue } 20625a255516SAlexander V. Chernikov lle->ln_state = ND6_LLINFO_NOSTATE; 20635a255516SAlexander V. Chernikov 20645a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 20655a255516SAlexander V. Chernikov LLE_WLOCK(lle); 20665a255516SAlexander V. Chernikov /* Prefer any existing entry over newly-created one */ 20675a255516SAlexander V. Chernikov lle_tmp = nd6_lookup(&dst->sin6_addr, ND6_EXCLUSIVE, ifp); 20685a255516SAlexander V. Chernikov if (lle_tmp == NULL) 20695a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), lle); 20705a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 20715a255516SAlexander V. Chernikov if (lle_tmp != NULL) { 20725a255516SAlexander V. Chernikov lltable_free_entry(LLTABLE6(ifp), lle); 20735a255516SAlexander V. Chernikov lle = lle_tmp; 20745a255516SAlexander V. Chernikov lle_tmp = NULL; 20755a255516SAlexander V. Chernikov } 20765a255516SAlexander V. Chernikov } 20775a255516SAlexander V. Chernikov } 20785a255516SAlexander V. Chernikov if (lle == NULL) { 20791fe201c3SAlexander V. Chernikov if (!(ND_IFINFO(ifp)->flags & ND6_IFF_PERFORMNUD)) { 20805a255516SAlexander V. Chernikov m_freem(m); 20815a255516SAlexander V. Chernikov return (ENOBUFS); 20825a255516SAlexander V. Chernikov } 20831fe201c3SAlexander V. Chernikov 20841fe201c3SAlexander V. Chernikov if (m != NULL) 20851fe201c3SAlexander V. Chernikov m_freem(m); 20861fe201c3SAlexander V. Chernikov return (ENOBUFS); 2087686cdd19SJun-ichiro itojun Hagino } 2088686cdd19SJun-ichiro itojun Hagino 2089f6990c4eSAlexander V. Chernikov LLE_WLOCK_ASSERT(lle); 2090f6990c4eSAlexander V. Chernikov 209182cd038dSYoshinobu Inoue /* 209282cd038dSYoshinobu Inoue * The first time we send a packet to a neighbor whose entry is 209382cd038dSYoshinobu Inoue * STALE, we have to change the state to DELAY and a sets a timer to 209482cd038dSYoshinobu Inoue * expire in DELAY_FIRST_PROBE_TIME seconds to ensure do 209582cd038dSYoshinobu Inoue * neighbor unreachability detection on expiration. 209682cd038dSYoshinobu Inoue * (RFC 2461 7.3.3) 209782cd038dSYoshinobu Inoue */ 2098f6990c4eSAlexander V. Chernikov if (lle->ln_state == ND6_LLINFO_STALE) { 2099f6990c4eSAlexander V. Chernikov lle->la_asked = 0; 2100f6990c4eSAlexander V. Chernikov lle->ln_state = ND6_LLINFO_DELAY; 2101f6990c4eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, (long)V_nd6_delay * hz); 210282cd038dSYoshinobu Inoue } 210382cd038dSYoshinobu Inoue 210482cd038dSYoshinobu Inoue /* 210582cd038dSYoshinobu Inoue * If the neighbor cache entry has a state other than INCOMPLETE 210688ff5695SSUZUKI Shinsuke * (i.e. its link-layer address is already resolved), just 210782cd038dSYoshinobu Inoue * send the packet. 210882cd038dSYoshinobu Inoue */ 21091fe201c3SAlexander V. Chernikov if (lle->ln_state > ND6_LLINFO_INCOMPLETE) { 21101fe201c3SAlexander V. Chernikov bcopy(&lle->ll_addr, desten, ifp->if_addrlen); 21111fe201c3SAlexander V. Chernikov if (pflags != NULL) 21121fe201c3SAlexander V. Chernikov *pflags = lle->la_flags; 21131fe201c3SAlexander V. Chernikov LLE_WUNLOCK(lle); 21141fe201c3SAlexander V. Chernikov return (0); 21151fe201c3SAlexander V. Chernikov } 211682cd038dSYoshinobu Inoue 211782cd038dSYoshinobu Inoue /* 211882cd038dSYoshinobu Inoue * There is a neighbor cache entry, but no ethernet address 2119743eee66SSUZUKI Shinsuke * response yet. Append this latest packet to the end of the 2120743eee66SSUZUKI Shinsuke * packet queue in the mbuf, unless the number of the packet 2121743eee66SSUZUKI Shinsuke * does not exceed nd6_maxqueuelen. When it exceeds nd6_maxqueuelen, 2122743eee66SSUZUKI Shinsuke * the oldest packet in the queue will be removed. 212382cd038dSYoshinobu Inoue */ 2124f6990c4eSAlexander V. Chernikov if (lle->ln_state == ND6_LLINFO_NOSTATE) 2125f6990c4eSAlexander V. Chernikov lle->ln_state = ND6_LLINFO_INCOMPLETE; 21266e6b3f7cSQing Li 2127f6990c4eSAlexander V. Chernikov if (lle->la_hold != NULL) { 2128743eee66SSUZUKI Shinsuke struct mbuf *m_hold; 2129743eee66SSUZUKI Shinsuke int i; 2130743eee66SSUZUKI Shinsuke 2131743eee66SSUZUKI Shinsuke i = 0; 2132f6990c4eSAlexander V. Chernikov for (m_hold = lle->la_hold; m_hold; m_hold = m_hold->m_nextpkt){ 2133743eee66SSUZUKI Shinsuke i++; 2134743eee66SSUZUKI Shinsuke if (m_hold->m_nextpkt == NULL) { 2135743eee66SSUZUKI Shinsuke m_hold->m_nextpkt = m; 2136743eee66SSUZUKI Shinsuke break; 213782cd038dSYoshinobu Inoue } 213882cd038dSYoshinobu Inoue } 2139603724d3SBjoern A. Zeeb while (i >= V_nd6_maxqueuelen) { 2140f6990c4eSAlexander V. Chernikov m_hold = lle->la_hold; 2141f6990c4eSAlexander V. Chernikov lle->la_hold = lle->la_hold->m_nextpkt; 214231d4137bSSUZUKI Shinsuke m_freem(m_hold); 2143743eee66SSUZUKI Shinsuke i--; 2144743eee66SSUZUKI Shinsuke } 2145743eee66SSUZUKI Shinsuke } else { 2146f6990c4eSAlexander V. Chernikov lle->la_hold = m; 21476e6b3f7cSQing Li } 2148743eee66SSUZUKI Shinsuke 2149743eee66SSUZUKI Shinsuke /* 2150743eee66SSUZUKI Shinsuke * If there has been no NS for the neighbor after entering the 2151743eee66SSUZUKI Shinsuke * INCOMPLETE state, send the first solicitation. 2152743eee66SSUZUKI Shinsuke */ 2153f6990c4eSAlexander V. Chernikov if (!ND6_LLINFO_PERMANENT(lle) && lle->la_asked == 0) { 215426deb882SAlexander V. Chernikov struct in6_addr src, *psrc; 2155f6990c4eSAlexander V. Chernikov lle->la_asked++; 21566e6b3f7cSQing Li 2157f6990c4eSAlexander V. Chernikov nd6_llinfo_settimer_locked(lle, 2158743eee66SSUZUKI Shinsuke (long)ND_IFINFO(ifp)->retrans * hz / 1000); 215926deb882SAlexander V. Chernikov psrc = nd6_llinfo_get_holdsrc(lle, &src); 2160f6990c4eSAlexander V. Chernikov LLE_WUNLOCK(lle); 216126deb882SAlexander V. Chernikov nd6_ns_output(ifp, psrc, NULL, &dst->sin6_addr, NULL); 2162d7968c29SAlexander V. Chernikov } else { 2163d7968c29SAlexander V. Chernikov /* We did the lookup so we need to do the unlock here. */ 2164f6990c4eSAlexander V. Chernikov LLE_WUNLOCK(lle); 2165743eee66SSUZUKI Shinsuke } 2166e6950476SBjoern A. Zeeb 21671fe201c3SAlexander V. Chernikov return (EWOULDBLOCK); 216882cd038dSYoshinobu Inoue } 216982cd038dSYoshinobu Inoue 21706e6b3f7cSQing Li 21716e6b3f7cSQing Li int 2172d7968c29SAlexander V. Chernikov nd6_flush_holdchain(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *chain, 21739c9bde01SAlexander V. Chernikov struct sockaddr_in6 *dst) 21746e6b3f7cSQing Li { 21756e6b3f7cSQing Li struct mbuf *m, *m_head; 21766e6b3f7cSQing Li struct ifnet *outifp; 21776e6b3f7cSQing Li int error = 0; 21786e6b3f7cSQing Li 21796e6b3f7cSQing Li m_head = chain; 21806e6b3f7cSQing Li if ((ifp->if_flags & IFF_LOOPBACK) != 0) 21816e6b3f7cSQing Li outifp = origifp; 21826e6b3f7cSQing Li else 21836e6b3f7cSQing Li outifp = ifp; 21846e6b3f7cSQing Li 21856e6b3f7cSQing Li while (m_head) { 21866e6b3f7cSQing Li m = m_head; 21876e6b3f7cSQing Li m_head = m_head->m_nextpkt; 2188d7968c29SAlexander V. Chernikov error = nd6_output_ifp(ifp, origifp, m, dst); 21896e6b3f7cSQing Li } 21906e6b3f7cSQing Li 21916e6b3f7cSQing Li /* 21926e6b3f7cSQing Li * XXX 21931fe201c3SAlexander V. Chernikov * note that intermediate errors are blindly ignored 21946e6b3f7cSQing Li */ 21956e6b3f7cSQing Li return (error); 21966e6b3f7cSQing Li } 21976e6b3f7cSQing Li 21981fe201c3SAlexander V. Chernikov static int 21991272577eSXin LI nd6_need_cache(struct ifnet *ifp) 220033841545SHajimu UMEMOTO { 220133841545SHajimu UMEMOTO /* 220233841545SHajimu UMEMOTO * XXX: we currently do not make neighbor cache on any interface 220333841545SHajimu UMEMOTO * other than ARCnet, Ethernet, FDDI and GIF. 220433841545SHajimu UMEMOTO * 220533841545SHajimu UMEMOTO * RFC2893 says: 220633841545SHajimu UMEMOTO * - unidirectional tunnels needs no ND 220733841545SHajimu UMEMOTO */ 220833841545SHajimu UMEMOTO switch (ifp->if_type) { 220933841545SHajimu UMEMOTO case IFT_ARCNET: 221033841545SHajimu UMEMOTO case IFT_ETHER: 221133841545SHajimu UMEMOTO case IFT_FDDI: 221233841545SHajimu UMEMOTO case IFT_IEEE1394: 221305b6760dSMunechika SUMIKAWA case IFT_L2VLAN: 221433841545SHajimu UMEMOTO case IFT_IEEE80211: 2215e4cd31ddSJeff Roberson case IFT_INFINIBAND: 221659280079SAndrew Thompson case IFT_BRIDGE: 2217c57086ceSHajimu UMEMOTO case IFT_PROPVIRTUAL: 221833841545SHajimu UMEMOTO return (1); 221933841545SHajimu UMEMOTO default: 222033841545SHajimu UMEMOTO return (0); 222133841545SHajimu UMEMOTO } 222233841545SHajimu UMEMOTO } 222333841545SHajimu UMEMOTO 22246e6b3f7cSQing Li /* 2225f6b84910SAlexander V. Chernikov * Add pernament ND6 link-layer record for given 2226f6b84910SAlexander V. Chernikov * interface address. 2227f6b84910SAlexander V. Chernikov * 2228f6b84910SAlexander V. Chernikov * Very similar to IPv4 arp_ifinit(), but: 2229f6b84910SAlexander V. Chernikov * 1) IPv6 DAD is performed in different place 2230f6b84910SAlexander V. Chernikov * 2) It is called by IPv6 protocol stack in contrast to 2231f6b84910SAlexander V. Chernikov * arp_ifinit() which is typically called in SIOCSIFADDR 2232f6b84910SAlexander V. Chernikov * driver ioctl handler. 2233f6b84910SAlexander V. Chernikov * 2234f6b84910SAlexander V. Chernikov */ 2235f6b84910SAlexander V. Chernikov int 2236f6b84910SAlexander V. Chernikov nd6_add_ifa_lle(struct in6_ifaddr *ia) 2237f6b84910SAlexander V. Chernikov { 2238f6b84910SAlexander V. Chernikov struct ifnet *ifp; 22395a255516SAlexander V. Chernikov struct llentry *ln, *ln_tmp; 22405a255516SAlexander V. Chernikov struct sockaddr *dst; 2241f6b84910SAlexander V. Chernikov 2242f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2243af6209a1SAndrey V. Elsukov if (nd6_need_cache(ifp) == 0) 2244af6209a1SAndrey V. Elsukov return (0); 22455a255516SAlexander V. Chernikov 2246f6b84910SAlexander V. Chernikov ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 22475a255516SAlexander V. Chernikov dst = (struct sockaddr *)&ia->ia_addr; 22485a255516SAlexander V. Chernikov ln = lltable_alloc_entry(LLTABLE6(ifp), LLE_IFADDR, dst); 22495a255516SAlexander V. Chernikov if (ln == NULL) 22505a255516SAlexander V. Chernikov return (ENOBUFS); 22515a255516SAlexander V. Chernikov 22525a255516SAlexander V. Chernikov IF_AFDATA_WLOCK(ifp); 22535a255516SAlexander V. Chernikov LLE_WLOCK(ln); 22545a255516SAlexander V. Chernikov /* Unlink any entry if exists */ 22555a255516SAlexander V. Chernikov ln_tmp = lla_lookup(LLTABLE6(ifp), LLE_EXCLUSIVE, dst); 22565a255516SAlexander V. Chernikov if (ln_tmp != NULL) 22575a255516SAlexander V. Chernikov lltable_unlink_entry(LLTABLE6(ifp), ln_tmp); 22585a255516SAlexander V. Chernikov lltable_link_entry(LLTABLE6(ifp), ln); 22595a255516SAlexander V. Chernikov IF_AFDATA_WUNLOCK(ifp); 22605a255516SAlexander V. Chernikov 22615a255516SAlexander V. Chernikov if (ln_tmp != NULL) 22625a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln_tmp, LLENTRY_EXPIRED); 22635a255516SAlexander V. Chernikov EVENTHANDLER_INVOKE(lle_event, ln, LLENTRY_RESOLVED); 22645a255516SAlexander V. Chernikov 22655a255516SAlexander V. Chernikov LLE_WUNLOCK(ln); 22665a255516SAlexander V. Chernikov if (ln_tmp != NULL) 22675a255516SAlexander V. Chernikov llentry_free(ln_tmp); 22685a255516SAlexander V. Chernikov 22695a255516SAlexander V. Chernikov return (0); 2270f6b84910SAlexander V. Chernikov } 2271f6b84910SAlexander V. Chernikov 2272f6b84910SAlexander V. Chernikov /* 22733e7a2321SAlexander V. Chernikov * Removes either all lle entries for given @ia, or lle 22743e7a2321SAlexander V. Chernikov * corresponding to @ia address. 2275f6b84910SAlexander V. Chernikov */ 2276f6b84910SAlexander V. Chernikov void 22773e7a2321SAlexander V. Chernikov nd6_rem_ifa_lle(struct in6_ifaddr *ia, int all) 2278f6b84910SAlexander V. Chernikov { 2279f6b84910SAlexander V. Chernikov struct sockaddr_in6 mask, addr; 22803e7a2321SAlexander V. Chernikov struct sockaddr *saddr, *smask; 2281f6b84910SAlexander V. Chernikov struct ifnet *ifp; 2282f6b84910SAlexander V. Chernikov 2283f6b84910SAlexander V. Chernikov ifp = ia->ia_ifa.ifa_ifp; 2284f6b84910SAlexander V. Chernikov memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 2285f6b84910SAlexander V. Chernikov memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 22863e7a2321SAlexander V. Chernikov saddr = (struct sockaddr *)&addr; 22873e7a2321SAlexander V. Chernikov smask = (struct sockaddr *)&mask; 22883e7a2321SAlexander V. Chernikov 22893e7a2321SAlexander V. Chernikov if (all != 0) 22903e7a2321SAlexander V. Chernikov lltable_prefix_free(AF_INET6, saddr, smask, LLE_STATIC); 22913e7a2321SAlexander V. Chernikov else 22923e7a2321SAlexander V. Chernikov lltable_delete_addr(LLTABLE6(ifp), LLE_IFADDR, saddr); 2293f6b84910SAlexander V. Chernikov } 2294f6b84910SAlexander V. Chernikov 229531d4137bSSUZUKI Shinsuke static void 22966e6b3f7cSQing Li clear_llinfo_pqueue(struct llentry *ln) 229731d4137bSSUZUKI Shinsuke { 229831d4137bSSUZUKI Shinsuke struct mbuf *m_hold, *m_hold_next; 229931d4137bSSUZUKI Shinsuke 23006e6b3f7cSQing Li for (m_hold = ln->la_hold; m_hold; m_hold = m_hold_next) { 230131d4137bSSUZUKI Shinsuke m_hold_next = m_hold->m_nextpkt; 230231d4137bSSUZUKI Shinsuke m_freem(m_hold); 230331d4137bSSUZUKI Shinsuke } 230431d4137bSSUZUKI Shinsuke 23056e6b3f7cSQing Li ln->la_hold = NULL; 230631d4137bSSUZUKI Shinsuke return; 230731d4137bSSUZUKI Shinsuke } 230831d4137bSSUZUKI Shinsuke 230933841545SHajimu UMEMOTO static int nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS); 231033841545SHajimu UMEMOTO static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS); 231133841545SHajimu UMEMOTO #ifdef SYSCTL_DECL 231233841545SHajimu UMEMOTO SYSCTL_DECL(_net_inet6_icmp6); 231333841545SHajimu UMEMOTO #endif 231433841545SHajimu UMEMOTO SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist, 231533841545SHajimu UMEMOTO CTLFLAG_RD, nd6_sysctl_drlist, ""); 231633841545SHajimu UMEMOTO SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist, 231733841545SHajimu UMEMOTO CTLFLAG_RD, nd6_sysctl_prlist, ""); 23186df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen, 23196df8a710SGleb Smirnoff CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, ""); 23206df8a710SGleb Smirnoff SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer, 23216df8a710SGleb Smirnoff CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), ""); 232233841545SHajimu UMEMOTO 232333841545SHajimu UMEMOTO static int 232433841545SHajimu UMEMOTO nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS) 232533841545SHajimu UMEMOTO { 23267195094cSMarius Strobl struct in6_defrouter d; 232733841545SHajimu UMEMOTO struct nd_defrouter *dr; 23287195094cSMarius Strobl int error; 232933841545SHajimu UMEMOTO 233033841545SHajimu UMEMOTO if (req->newptr) 23317195094cSMarius Strobl return (EPERM); 233233841545SHajimu UMEMOTO 23337195094cSMarius Strobl bzero(&d, sizeof(d)); 23347195094cSMarius Strobl d.rtaddr.sin6_family = AF_INET6; 23357195094cSMarius Strobl d.rtaddr.sin6_len = sizeof(d.rtaddr); 23367195094cSMarius Strobl 23377195094cSMarius Strobl /* 23387195094cSMarius Strobl * XXX locking 23397195094cSMarius Strobl */ 23403b0b2840SJohn Baldwin TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) { 23417195094cSMarius Strobl d.rtaddr.sin6_addr = dr->rtaddr; 23427195094cSMarius Strobl error = sa6_recoverscope(&d.rtaddr); 2343edbb8b46SPeter Wemm if (error != 0) 2344b2630c29SGeorge V. Neville-Neil return (error); 23457195094cSMarius Strobl d.flags = dr->flags; 23467195094cSMarius Strobl d.rtlifetime = dr->rtlifetime; 2347ffa0165aSHiroki Sato d.expire = dr->expire + (time_second - time_uptime); 23487195094cSMarius Strobl d.if_index = dr->ifp->if_index; 23497195094cSMarius Strobl error = SYSCTL_OUT(req, &d, sizeof(d)); 23507195094cSMarius Strobl if (error != 0) 235107eb2995SHajimu UMEMOTO return (error); 235233841545SHajimu UMEMOTO } 23537195094cSMarius Strobl return (0); 23547195094cSMarius Strobl } 235533841545SHajimu UMEMOTO 235633841545SHajimu UMEMOTO static int 235733841545SHajimu UMEMOTO nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS) 235833841545SHajimu UMEMOTO { 23597195094cSMarius Strobl struct in6_prefix p; 23607195094cSMarius Strobl struct sockaddr_in6 s6; 236133841545SHajimu UMEMOTO struct nd_prefix *pr; 23627195094cSMarius Strobl struct nd_pfxrouter *pfr; 23637195094cSMarius Strobl time_t maxexpire; 23647195094cSMarius Strobl int error; 23651d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 236633841545SHajimu UMEMOTO 236733841545SHajimu UMEMOTO if (req->newptr) 23687195094cSMarius Strobl return (EPERM); 236933841545SHajimu UMEMOTO 23707195094cSMarius Strobl bzero(&p, sizeof(p)); 23717195094cSMarius Strobl p.origin = PR_ORIG_RA; 23727195094cSMarius Strobl bzero(&s6, sizeof(s6)); 23737195094cSMarius Strobl s6.sin6_family = AF_INET6; 23747195094cSMarius Strobl s6.sin6_len = sizeof(s6); 23757195094cSMarius Strobl 23767195094cSMarius Strobl /* 23777195094cSMarius Strobl * XXX locking 23787195094cSMarius Strobl */ 23793b0b2840SJohn Baldwin LIST_FOREACH(pr, &V_nd_prefix, ndpr_entry) { 23807195094cSMarius Strobl p.prefix = pr->ndpr_prefix; 23817195094cSMarius Strobl if (sa6_recoverscope(&p.prefix)) { 23827195094cSMarius Strobl log(LOG_ERR, "scope error in prefix list (%s)\n", 23837195094cSMarius Strobl ip6_sprintf(ip6buf, &p.prefix.sin6_addr)); 2384a1f7e5f8SHajimu UMEMOTO /* XXX: press on... */ 2385a1f7e5f8SHajimu UMEMOTO } 23867195094cSMarius Strobl p.raflags = pr->ndpr_raf; 23877195094cSMarius Strobl p.prefixlen = pr->ndpr_plen; 23887195094cSMarius Strobl p.vltime = pr->ndpr_vltime; 23897195094cSMarius Strobl p.pltime = pr->ndpr_pltime; 23907195094cSMarius Strobl p.if_index = pr->ndpr_ifp->if_index; 2391743eee66SSUZUKI Shinsuke if (pr->ndpr_vltime == ND6_INFINITE_LIFETIME) 23927195094cSMarius Strobl p.expire = 0; 2393743eee66SSUZUKI Shinsuke else { 2394743eee66SSUZUKI Shinsuke /* XXX: we assume time_t is signed. */ 2395743eee66SSUZUKI Shinsuke maxexpire = (-1) & 23967195094cSMarius Strobl ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 23977195094cSMarius Strobl if (pr->ndpr_vltime < maxexpire - pr->ndpr_lastupdate) 23987195094cSMarius Strobl p.expire = pr->ndpr_lastupdate + 2399ffa0165aSHiroki Sato pr->ndpr_vltime + 2400ffa0165aSHiroki Sato (time_second - time_uptime); 24017195094cSMarius Strobl else 24027195094cSMarius Strobl p.expire = maxexpire; 2403743eee66SSUZUKI Shinsuke } 24047195094cSMarius Strobl p.refcnt = pr->ndpr_refcnt; 24057195094cSMarius Strobl p.flags = pr->ndpr_stateflags; 24067195094cSMarius Strobl p.advrtrs = 0; 24077195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) 24087195094cSMarius Strobl p.advrtrs++; 24097195094cSMarius Strobl error = SYSCTL_OUT(req, &p, sizeof(p)); 24107195094cSMarius Strobl if (error != 0) 241107eb2995SHajimu UMEMOTO return (error); 24127195094cSMarius Strobl LIST_FOREACH(pfr, &pr->ndpr_advrtrs, pfr_entry) { 24137195094cSMarius Strobl s6.sin6_addr = pfr->router->rtaddr; 24147195094cSMarius Strobl if (sa6_recoverscope(&s6)) 24157195094cSMarius Strobl log(LOG_ERR, 24167195094cSMarius Strobl "scope error in prefix list (%s)\n", 24177195094cSMarius Strobl ip6_sprintf(ip6buf, &pfr->router->rtaddr)); 24187195094cSMarius Strobl error = SYSCTL_OUT(req, &s6, sizeof(s6)); 24197195094cSMarius Strobl if (error != 0) 24207195094cSMarius Strobl return (error); 24217195094cSMarius Strobl } 24227195094cSMarius Strobl } 24237195094cSMarius Strobl return (0); 242433841545SHajimu UMEMOTO } 2425