--- /dev/null
+/*!\file netinet6/nd6.h
+ * IPv6 Neighbor Discovery.
+ */
+
+/* $FreeBSD: src/sys/netinet6/nd6.h,v 1.10 2002/04/19 04:46:23 suz Exp $ */
+/* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 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 <sys/queue.h>
+#include <sys/callout.h>
+
+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;
+ /* 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
+
+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_defrouter {
+ struct sockaddr_in6 rtaddr;
+ u_char flags;
+ u_short rtlifetime;
+ u_long expire;
+ u_short if_index;
+};
+
+struct in6_prlist {
+ char ifname[IFNAMSIZ];
+ struct {
+ struct in6_addr prefix;
+ struct prf_ra raflags;
+ u_char prefixlen;
+ u_char origin;
+ u_int32_t vltime;
+ u_int32_t pltime;
+ time_t expire;
+ u_short if_index;
+ u_short advrtrs; /* number of advertisement routers */
+ struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
+ } prefix[PRLSTSIZ];
+};
+
+struct in6_prefix {
+ struct sockaddr_in6 prefix;
+ struct prf_ra raflags;
+ u_char prefixlen;
+ u_char origin;
+ u_long vltime;
+ u_long pltime;
+ u_long expire;
+ u_int32_t flags;
+ int refcnt;
+ u_short if_index;
+ u_short advrtrs; /* number of advertisement routers */
+ /* struct sockaddr_in6 advrtr[] */
+};
+
+#ifdef _KERNEL
+struct in6_ondireq {
+ char ifname[IFNAMSIZ];
+ struct {
+ 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;
+ } ndi;
+};
+#endif
+
+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
+
+/* 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 DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
+#define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
+#define TEMPADDR_REGEN_ADVANCE 5 /* sec */
+#define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
+#define ND_COMPUTE_RTIME(x) \
+ (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \
+ ((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; /* flags on RA message */
+ u_short rtlifetime;
+ u_long expire;
+ u_long advint; /* Mobile IPv6 addition (milliseconds) */
+ u_long advint_expire; /* Mobile IPv6 addition */
+ int advints_lost; /* Mobile IPv6 addition */
+ 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;
+ 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 couter from addresses */
+};
+
+#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
+
+/*
+ * 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 compatibility */
+ 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 callout nd6_timer_ch;
+
+/* nd6_rtr.c */
+extern int nd6_defifindex;
+extern int ip6_desync_factor; /* seconds */
+extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */
+extern u_int32_t ip6_temp_valid_lifetime; /* seconds */
+extern int ip6_temp_regen_advance; /* seconds */
+
+union nd_opts {
+ struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */
+ 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 *six;
+ struct nd_opt_advint *adv;
+ struct nd_opt_hai *hai;
+ 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_adv nd_opt_each.adv
+#define nd_opts_hai nd_opt_each.hai
+#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 *));
+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));
+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 *));
+int nd6_need_cache __P((struct ifnet *));
+
+/* nd6_nbr.c */
+void nd6_na_input __P((struct mbuf *, int, int));
+void nd6_na_output __P((struct ifnet *, const struct in6_addr *,
+ const struct in6_addr *, u_long, int, struct sockaddr *));
+void nd6_ns_input __P((struct mbuf *, int, int));
+void nd6_ns_output __P((struct ifnet *, const struct in6_addr *,
+ const 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 *));
+int nd6_prelist_add __P((struct nd_prefix *, struct nd_defrouter *,
+ struct nd_prefix **));
+int nd6_prefix_onlink __P((struct nd_prefix *));
+int nd6_prefix_offlink __P((struct nd_prefix *));
+void pfxlist_onlink_check __P((void));
+struct nd_defrouter *defrouter_lookup __P((struct in6_addr *,
+ struct ifnet *));
+struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefix *));
+int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr));
+void rt6_flush __P((struct in6_addr *, struct ifnet *));
+int nd6_setdefaultiface __P((int));
+int in6_tmpifadd __P((const struct in6_ifaddr *, int));
+
+#endif /* _KERNEL */
+
+#endif /* _NETINET6_ND6_H_ */
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