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- /* $KAME: nd6.h,v 1.18 2000/03/16 11:58:32 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>
-
- 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 */
- };
-
- #define ND6_LLINFO_NOSTATE -2
- #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
-
- #if 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 */
- #ifndef __OpenBSD__
- #define ND_COMPUTE_RTIME(x) \
- (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \
- ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
- #else
- #define ND_COMPUTE_RTIME(x) \
- (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
- ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
- #endif
-
- 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;
- 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;
- /* 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 struct llinfo_nd6 llinfo_nd6;
- extern struct nd_ifinfo *nd_ifinfo;
- extern struct nd_drhead nd_defrouter;
- extern struct nd_prhead nd_prefix;
-
- /* nd6_rtr.c */
- extern struct ifnet *nd6_defifp; /* XXXYYY */
- extern int nd6_defifindex;
-
- 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 in6_addr *, 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_timer_funneled __P((void *));
- void nd6_purge __P((struct ifnet *));
- void nd6_free __P((struct rtentry *));
- void nd6_nud_hint __P((struct rtentry *, struct in6_addr *));
- int nd6_resolve __P((struct ifnet *, struct rtentry *,
- struct mbuf *, struct sockaddr *, u_char *));
- #if defined(__bsdi__) && _BSDI_VERSION >= 199802
- void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *));
- void nd6_p2p_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *));
- #else
- void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *));
- void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *));
- #endif
- 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 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_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 *));
- struct nd_pfxrouter *find_pfxlist_reachable_router __P((struct nd_prefix *)); /* XXXYYY */
- void pfxlist_onlink_check __P((void));
- void defrouter_addifreq __P((struct ifnet *)); /* XXXYYY */
- struct nd_defrouter *defrouter_lookup __P((struct in6_addr *,
- struct ifnet *));
- struct nd_prefix *prefix_lookup __P((struct nd_prefix *)); /* XXXYYY */
- int in6_ifdel __P((struct ifnet *, struct in6_addr *));
- struct nd_pfxrouter *pfxrtr_lookup __P((struct nd_prefix *,
- struct nd_defrouter *)); /* XXXYYY */
- 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_ */
-