/* $OpenBSD: nd6.h,v 1.14 2001/02/23 08:01:15 itojun Exp $ */ /* $KAME: nd6.h,v 1.52 2001/02/19 04:40:37 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 #include #include 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 */ long ln_asked; /* number of queries already sent for this addr */ u_long ln_expire; /* lifetime for NDP state transition */ short ln_state; /* reachability state */ short ln_router; /* 2^0: ND6 router bit */ int ln_byhint; /* # of times we made it reachable by UL hint */ }; #define ND6_LLINFO_NOSTATE -2 /* * We don't need the WAITDELETE state any more, but we keep the definition * in a comment line instead of removing it. This is necessary to avoid * unintentionally reusing the value for another purpose, which might * affect backward compatibility with old applications. * (20000711 jinmei@kame.net) */ /* #define ND6_LLINFO_WAITDELETE -1 */ #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 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 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 receivedra; }; #define ND6_IFF_PERFORMNUD 0x1 struct in6_nbrinfo { char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ struct in6_addr addr; /* IPv6 address of the neighbor */ long asked; /* number of queries already sent for this addr */ int isrouter; /* if it acts as a router */ int state; /* reachability state */ int expire; /* lifetime for NDP state transition */ }; #define DRLSTSIZ 10 #define PRLSTSIZ 10 struct in6_drlist { char ifname[IFNAMSIZ]; struct { struct in6_addr rtaddr; u_char flags; u_short rtlifetime; u_long expire; u_short if_index; } defrouter[DRLSTSIZ]; }; struct in6_prlist { char ifname[IFNAMSIZ]; struct { struct in6_addr prefix; struct prf_ra raflags; u_char prefixlen; u_char origin; u_long vltime; u_long pltime; u_long expire; u_short if_index; u_short advrtrs; /* number of advertisement routers */ struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ } prefix[PRLSTSIZ]; }; struct in6_ndireq { char ifname[IFNAMSIZ]; struct nd_ifinfo ndi; }; struct in6_ndifreq { char ifname[IFNAMSIZ]; u_long ifindex; }; /* 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 #ifdef _KERNEL /* 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; u_char flags; u_short rtlifetime; u_long expire; struct ifnet *ifp; }; 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 */ struct in6_addr ndpr_addr; /* address that is derived from the prefix */ u_int32_t ndpr_vltime; /* advertised valid lifetime */ u_int32_t ndpr_pltime; /* advertised preferred lifetime */ time_t ndpr_expire; /* expiration time of the prefix */ time_t ndpr_preferred; /* preferred time of the prefix */ struct prf_ra ndpr_flags; /* list of routers that advertise the prefix: */ LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; u_char ndpr_plen; struct ndpr_stateflags { /* if this prefix can be regarded as on-link */ u_char onlink : 1; } ndpr_stateflags; }; #define ndpr_next ndpr_entry.le_next #define ndpr_raf ndpr_flags #define ndpr_raf_onlink ndpr_flags.onlink #define ndpr_raf_auto ndpr_flags.autonomous #define ndpr_statef_onlink ndpr_stateflags.onlink #define ndpr_statef_addmark ndpr_stateflags.addmark /* * We keep expired prefix for certain amount of time, for validation purposes. * 1800s = MaxRtrAdvInterval */ #define NDPR_KEEP_EXPIRED (1800 * 2) /* * Message format for use in obtaining information about prefixes * from inet6 sysctl function */ struct inet6_ndpr_msghdr { u_short inpm_msglen; /* to skip over non-understood messages */ u_char inpm_version; /* future binary compatability */ u_char inpm_type; /* message type */ struct in6_addr inpm_prefix; u_long prm_vltim; u_long prm_pltime; u_long prm_expire; u_long prm_preferred; struct in6_prflags prm_flags; u_short prm_index; /* index for associated ifp */ u_char prm_plen; /* length of prefix in bits */ }; #define prm_raf_onlink prm_flags.prf_ra.onlink #define prm_raf_auto prm_flags.prf_ra.autonomous #define prm_statef_onlink prm_flags.prf_state.onlink #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) struct nd_pfxrouter { LIST_ENTRY(nd_pfxrouter) pfr_entry; #define pfr_next pfr_entry.le_next struct nd_defrouter *router; }; LIST_HEAD(nd_prhead, nd_prefix); /* nd6.c */ extern int nd6_prune; extern int nd6_delay; extern int nd6_umaxtries; extern int nd6_mmaxtries; extern int nd6_useloopback; extern int nd6_maxnudhint; extern int nd6_gctimer; extern struct llinfo_nd6 llinfo_nd6; extern struct nd_ifinfo *nd_ifinfo; 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; /* nd6_rtr.c */ extern struct ifnet *nd6_defifp; /* XXXYYY */ extern int nd6_defifindex; 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 /* XXX: need nd6_var.h?? */ /* nd6.c */ void nd6_init __P((void)); void nd6_ifattach __P((struct ifnet *)); int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); void nd6_option_init __P((void *, int, union nd_opts *)); struct nd_opt_hdr *nd6_option __P((union nd_opts *)); int nd6_options __P((union nd_opts *)); struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); void nd6_setmtu __P((struct ifnet *)); void nd6_timer __P((void *)); void nd6_purge __P((struct ifnet *)); struct llinfo_nd6 *nd6_free __P((struct rtentry *)); void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); int nd6_resolve __P((struct ifnet *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *)); void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); void nd6_p2p_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, char *, int, int, int)); /* for test */ int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, struct sockaddr_in6 *, struct rtentry *)); int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *)); /* nd6_nbr.c */ void nd6_na_input __P((struct mbuf *, int, int)); void nd6_na_output __P((struct ifnet *, struct in6_addr *, struct in6_addr *, u_long, int, struct sockaddr *)); void nd6_ns_input __P((struct mbuf *, int, int)); void nd6_ns_output __P((struct ifnet *, struct in6_addr *, struct in6_addr *, struct llinfo_nd6 *, int)); caddr_t nd6_ifptomac __P((struct ifnet *)); void nd6_dad_start __P((struct ifaddr *, int *)); void nd6_dad_stop __P((struct ifaddr *)); void nd6_dad_duplicated __P((struct ifaddr *)); /* nd6_rtr.c */ void nd6_rs_input __P((struct mbuf *, int, int)); void nd6_ra_input __P((struct mbuf *, int, int)); void prelist_del __P((struct nd_prefix *)); void defrouter_addreq __P((struct nd_defrouter *)); void defrouter_delreq __P((struct nd_defrouter *, int)); void defrouter_select __P((void)); void defrtrlist_del __P((struct nd_defrouter *)); void prelist_remove __P((struct nd_prefix *)); int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, struct mbuf *)); void pfxlist_onlink_check __P((void)); struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, struct ifnet *)); int in6_ifdel __P((struct ifnet *, struct in6_addr *)); int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); void rt6_flush __P((struct in6_addr *, struct ifnet *)); int nd6_setdefaultiface __P((int)); #endif /* _KERNEL */ #endif /* _NETINET6_ND6_H_ */