FreeBSD/Linux Kernel Cross Reference
sys/netinet6/nd6.h

     /*      $NetBSD: nd6.h,v 1.38 2004/03/23 18:21:38 martti 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
    
    #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 */
    
            long    ln_ntick;
            struct callout ln_timer_ch;
    };
    
    #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)
    #define ND6_LLINFO_PERMANENT(n) ((n)->ln_expire == 0)
    
    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
    
    #ifdef _KERNEL
    #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))
   #endif
   
   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;
   };
   
   #ifdef _KERNEL
   struct  in6_oprlist {
           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];
   };
   #endif
   
   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_int32_t vltime;
           u_int32_t pltime;
           time_t 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
   #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
   
   #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;          /* flags on RA message */
           u_short rtlifetime;
           u_long  expire;
           struct  ifnet *ifp;
           int     installed;      /* is installed into kernel routing table */
   };
   
   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 */
   
           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 */
           time_t ndpr_lastupdate; /* reception time of last advertisement */
   
           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
   #define ndpr_raf_router         ndpr_flags.router
   
   /*
    * 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
   
   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);
   
   #include <sys/mallocvar.h>
   MALLOC_DECLARE(M_IP6NDP);
   
   /* 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_drhead nd_defrouter;
   extern struct nd_prhead nd_prefix;
   extern int nd6_debug;
   
   #define nd6log(x)       do { if (nd6_debug) log x; } while (/*CONSTCOND*/ 0)
   
   extern struct callout nd6_timer_ch;
   
   /* nd6_rtr.c */
   extern int nd6_defifindex;
   
   union nd_opts {
           struct nd_opt_hdr *nd_opt_array[8];
           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));
   struct nd_ifinfo *nd6_ifattach __P((struct ifnet *));
   void nd6_ifdetach __P((struct nd_ifinfo *));
   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_llinfo_settimer __P((struct llinfo_nd6 *, long));
   void nd6_timer __P((void *));
   void nd6_purge __P((struct ifnet *));
   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_sysctl __P((int, void *, size_t *, void *, size_t));
   int nd6_need_cache __P((struct ifnet *));
   int ip6_getpmtu __P((struct route_in6 *, struct route_in6 *, struct ifnet *,
           struct in6_addr *, u_long *, int *));
   
   /* 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_reset __P((void));
   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_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_ */

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