/* $OpenBSD: nd6.h,v 1.37 2014/05/07 08:14:59 mpi Exp $ */ /* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _NETINET6_ND6_H_ #define _NETINET6_ND6_H_ /* see net/route.h, or net/if_inarp.h */ #ifndef RTF_ANNOUNCE #define RTF_ANNOUNCE RTF_PROTO2 #endif #define ND6_LLINFO_PURGE -3 #define ND6_LLINFO_NOSTATE -2 #define ND6_LLINFO_INCOMPLETE 0 #define ND6_LLINFO_REACHABLE 1 #define ND6_LLINFO_STALE 2 #define ND6_LLINFO_DELAY 3 #define ND6_LLINFO_PROBE 4 struct nd_ifinfo { u_int32_t linkmtu; /* LinkMTU */ u_int32_t maxmtu; /* Upper bound of LinkMTU */ u_int32_t basereachable; /* BaseReachableTime */ u_int32_t reachable; /* Reachable Time */ u_int32_t retrans; /* Retrans Timer */ u_int32_t flags; /* Flags */ int recalctm; /* BaseReacable re-calculation timer */ u_int8_t chlim; /* CurHopLimit */ u_int8_t initialized; /* Flag to see the entry is initialized */ /* the following 3 members are for privacy extension for addrconf */ u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ u_int8_t randomid[8]; /* current random ID */ }; #define ND6_IFF_PERFORMNUD 0x1 #define ND6_IFF_ACCEPT_RTADV 0x2 struct in6_nbrinfo { char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ struct in6_addr addr; /* IPv6 address of the neighbor */ time_t expire; /* lifetime for NDP state transition */ long asked; /* number of queries already sent for addr */ int isrouter; /* if it acts as a router */ int state; /* reachability state */ }; struct in6_defrouter { struct sockaddr_in6 rtaddr; time_t expire; u_short rtlifetime; u_short if_index; u_char flags; }; struct in6_prefix { struct sockaddr_in6 prefix; struct prf_ra raflags; time_t expire; u_int32_t vltime; u_int32_t pltime; u_int32_t flags; int refcnt; u_short if_index; u_short advrtrs; /* number of advertisement routers */ u_char prefixlen; u_char origin; /* struct sockaddr_in6 advrtr[] */ }; struct in6_ndireq { char ifname[IFNAMSIZ]; struct nd_ifinfo ndi; }; struct in6_ndifreq { char ifname[IFNAMSIZ]; u_long ifindex; }; /* Prefix status */ #define NDPRF_ONLINK 0x1 #define NDPRF_DETACHED 0x2 #define NDPRF_HOME 0x4 /* protocol constants */ #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ #define MAX_RTR_SOLICITATIONS 3 #define ND6_INFINITE_LIFETIME 0xffffffff /* constants for RFC 4941 autoconf privacy extension */ #define ND6_PRIV_MAX_DESYNC_FACTOR 600 /* 10 minutes */ #define ND6_PRIV_VALID_LIFETIME 604800 /* 1 week */ #define ND6_PRIV_PREFERRED_LIFETIME 86400 /* 1 day */ #ifdef _KERNEL #include #include #define ND_IFINFO(ifp) \ (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) #define IN6_LINKMTU(ifp) \ ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ ? ND_IFINFO(ifp)->linkmtu \ : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) struct llinfo_nd6 { struct llinfo_nd6 *ln_next; struct llinfo_nd6 *ln_prev; struct rtentry *ln_rt; struct mbuf *ln_hold; /* last packet until resolved/timeout */ time_t ln_expire; /* lifetime for NDP state transition */ long ln_asked; /* number of queries already sent for addr */ int ln_byhint; /* # of times we made it reachable by UL hint */ short ln_state; /* reachability state */ short ln_router; /* 2^0: ND6 router bit */ long ln_ntick; struct timeout ln_timer_ch; }; #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) #define ND6_LLINFO_PERMANENT(n) ((n)->ln_expire == 0) /* node constants */ #define MAX_REACHABLE_TIME 3600000 /* msec */ #define REACHABLE_TIME 30000 /* msec */ #define RETRANS_TIMER 1000 /* msec */ #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ #define ND_COMPUTE_RTIME(x) \ (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) TAILQ_HEAD(nd_drhead, nd_defrouter); struct nd_defrouter { TAILQ_ENTRY(nd_defrouter) dr_entry; struct in6_addr rtaddr; struct ifnet *ifp; time_t expire; int installed; /* is installed into kernel routing table */ u_short rtlifetime; u_char flags; /* flags on RA message */ }; struct nd_prefix { struct ifnet *ndpr_ifp; LIST_ENTRY(nd_prefix) ndpr_entry; struct sockaddr_in6 ndpr_prefix; /* prefix */ struct in6_addr ndpr_mask; /* netmask derived from the prefix */ time_t ndpr_expire; /* expiration time of the prefix */ time_t ndpr_preferred; /* preferred time of the prefix */ time_t ndpr_lastupdate; /* reception time of last advertisement */ u_int32_t ndpr_vltime; /* advertised valid lifetime */ u_int32_t ndpr_pltime; /* advertised preferred lifetime */ struct prf_ra ndpr_flags; u_int32_t ndpr_stateflags; /* actual state flags */ /* list of routers that advertise the prefix: */ LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; u_char ndpr_plen; int ndpr_refcnt; /* reference counter from addresses */ }; #define ndpr_raf ndpr_flags #define ndpr_raf_onlink ndpr_flags.onlink #define ndpr_raf_auto ndpr_flags.autonomous #define ndpr_raf_router ndpr_flags.router struct nd_pfxrouter { LIST_ENTRY(nd_pfxrouter) pfr_entry; struct nd_defrouter *router; }; LIST_HEAD(nd_prhead, nd_prefix); extern int nd6_prune; extern int nd6_delay; extern int nd6_umaxtries; extern int nd6_mmaxtries; extern int nd6_maxnudhint; extern int nd6_gctimer; extern struct llinfo_nd6 llinfo_nd6; extern struct nd_drhead nd_defrouter; extern struct nd_prhead nd_prefix; extern int nd6_debug; #define nd6log(x) do { if (nd6_debug) log x; } while (0) extern struct timeout nd6_timer_ch; union nd_opts { struct nd_opt_hdr *nd_opt_array[9]; struct { struct nd_opt_hdr *zero; struct nd_opt_hdr *src_lladdr; struct nd_opt_hdr *tgt_lladdr; struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ struct nd_opt_rd_hdr *rh; struct nd_opt_mtu *mtu; struct nd_opt_hdr *search; /* multiple opts */ struct nd_opt_hdr *last; /* multiple opts */ int done; struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ } nd_opt_each; }; #define nd_opts_src_lladdr nd_opt_each.src_lladdr #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr #define nd_opts_pi nd_opt_each.pi_beg #define nd_opts_pi_end nd_opt_each.pi_end #define nd_opts_rh nd_opt_each.rh #define nd_opts_mtu nd_opt_each.mtu #define nd_opts_search nd_opt_each.search #define nd_opts_last nd_opt_each.last #define nd_opts_done nd_opt_each.done void nd6_init(void); struct nd_ifinfo *nd6_ifattach(struct ifnet *); void nd6_ifdetach(struct nd_ifinfo *); int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *); void nd6_option_init(void *, int, union nd_opts *); struct nd_opt_hdr *nd6_option(union nd_opts *); int nd6_options(union nd_opts *); struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, u_int); void nd6_setmtu(struct ifnet *); void nd6_llinfo_settimer(struct llinfo_nd6 *, long); void nd6_timer(void *); void nd6_purge(struct ifnet *); void nd6_nud_hint(struct rtentry *, struct in6_addr *, int, u_int); int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *); void nd6_rtrequest(int, struct rtentry *); int nd6_ioctl(u_long, caddr_t, struct ifnet *); struct rtentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, char *, int, int, int); int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, struct sockaddr_in6 *, struct rtentry *); int nd6_storelladdr(struct ifnet *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *); int nd6_sysctl(int, void *, size_t *, void *, size_t); int nd6_need_cache(struct ifnet *); void nd6_na_input(struct mbuf *, int, int); void nd6_na_output(struct ifnet *, struct in6_addr *, struct in6_addr *, u_long, int, struct sockaddr *); void nd6_ns_input(struct mbuf *, int, int); void nd6_ns_output(struct ifnet *, struct in6_addr *, struct in6_addr *, struct llinfo_nd6 *, int); caddr_t nd6_ifptomac(struct ifnet *); void nd6_dad_start(struct ifaddr *, int *); void nd6_dad_stop(struct ifaddr *); void nd6_dad_duplicated(struct ifaddr *); void nd6_rs_input(struct mbuf *, int, int); void nd6_ra_input(struct mbuf *, int, int); void prelist_del(struct nd_prefix *); void defrouter_addreq(struct nd_defrouter *); void defrouter_reset(void); void defrouter_select(void); void defrtrlist_del(struct nd_defrouter *); void prelist_remove(struct nd_prefix *); int prelist_update(struct nd_prefix *, struct nd_defrouter *, struct mbuf *); int nd6_prelist_add(struct nd_prefix *, struct nd_defrouter *, struct nd_prefix **); int nd6_prefix_onlink(struct nd_prefix *); int nd6_prefix_offlink(struct nd_prefix *); void pfxlist_onlink_check(void); struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *); struct nd_prefix *nd6_prefix_lookup(struct nd_prefix *); int in6_ifdel(struct ifnet *, struct in6_addr *); int in6_init_prefix_ltimes(struct nd_prefix *ndpr); void rt6_flush(struct in6_addr *, struct ifnet *); #endif /* _KERNEL */ #endif /* _NETINET6_ND6_H_ */