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Annotation of src/sys/netinet6/nd6.h, Revision 1.14.4.1

1.14.4.1! itojun      1: /*     $NetBSD: nd6.h,v 1.14 2000/05/19 01:40:19 itojun Exp $  */
        !             2: /*     $KAME: nd6.h,v 1.23 2000/06/04 12:54:57 itojun Exp $    */
1.3       thorpej     3:
1.2       itojun      4: /*
                      5:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      6:  * All rights reserved.
1.11      itojun      7:  *
1.2       itojun      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. Neither the name of the project nor the names of its contributors
                     17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
1.11      itojun     19:  *
1.2       itojun     20:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #ifndef _NETINET6_ND6_H_
                     34: #define _NETINET6_ND6_H_
                     35:
1.9       itojun     36: /* see net/route.h, or net/if_inarp.h */
                     37: #ifndef RTF_ANNOUNCE
                     38: #define RTF_ANNOUNCE   RTF_PROTO2
                     39: #endif
                     40:
1.2       itojun     41: #include <sys/queue.h>
1.10      thorpej    42: #include <sys/callout.h>
1.2       itojun     43:
                     44: struct llinfo_nd6 {
                     45:        struct  llinfo_nd6 *ln_next;
                     46:        struct  llinfo_nd6 *ln_prev;
                     47:        struct  rtentry *ln_rt;
                     48:        struct  mbuf *ln_hold;  /* last packet until resolved/timeout */
                     49:        long    ln_asked;       /* number of queries already sent for this addr */
                     50:        u_long  ln_expire;      /* lifetime for NDP state transition */
                     51:        short   ln_state;       /* reachability state */
                     52:        short   ln_router;      /* 2^0: ND6 router bit */
1.14.4.1! itojun     53:        int     ln_byhint;      /* # of times we made it reachable by UL hint */
1.2       itojun     54: };
                     55:
                     56: #define ND6_LLINFO_NOSTATE     -2
                     57: #define ND6_LLINFO_WAITDELETE  -1
                     58: #define ND6_LLINFO_INCOMPLETE  0
                     59: #define ND6_LLINFO_REACHABLE   1
                     60: #define ND6_LLINFO_STALE       2
                     61: #define ND6_LLINFO_DELAY       3
                     62: #define ND6_LLINFO_PROBE       4
                     63:
1.6       itojun     64: #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
                     65:
1.2       itojun     66: struct nd_ifinfo {
                     67:        u_int32_t linkmtu;              /* LinkMTU */
                     68:        u_int32_t maxmtu;               /* Upper bound of LinkMTU */
                     69:        u_int32_t basereachable;        /* BaseReachableTime */
                     70:        u_int32_t reachable;            /* Reachable Time */
                     71:        u_int32_t retrans;              /* Retrans Timer */
1.12      itojun     72:        u_int32_t flags;                /* Flags */
1.6       itojun     73:        int recalctm;                   /* BaseReacable re-calculation timer */
1.2       itojun     74:        u_int8_t chlim;                 /* CurHopLimit */
                     75:        u_int8_t receivedra;
                     76: };
1.12      itojun     77:
                     78: #define ND6_IFF_PERFORMNUD     0x1
1.2       itojun     79:
                     80: struct in6_nbrinfo {
                     81:        char ifname[IFNAMSIZ];  /* if name, e.g. "en0" */
                     82:        struct in6_addr addr;   /* IPv6 address of the neighbor */
                     83:        long    asked;          /* number of queries already sent for this addr */
                     84:        int     isrouter;       /* if it acts as a router */
                     85:        int     state;          /* reachability state */
                     86:        int     expire;         /* lifetime for NDP state transition */
                     87: };
                     88:
                     89: #define DRLSTSIZ 10
                     90: #define PRLSTSIZ 10
                     91: struct in6_drlist {
                     92:        char ifname[IFNAMSIZ];
                     93:        struct {
                     94:                struct  in6_addr rtaddr;
                     95:                u_char  flags;
                     96:                u_short rtlifetime;
                     97:                u_long  expire;
                     98:                u_short if_index;
                     99:        } defrouter[DRLSTSIZ];
                    100: };
                    101:
                    102: struct in6_prlist {
                    103:        char ifname[IFNAMSIZ];
                    104:        struct {
                    105:                struct  in6_addr prefix;
                    106:                struct prf_ra raflags;
                    107:                u_char  prefixlen;
1.9       itojun    108:                u_char  origin;
1.2       itojun    109:                u_long  vltime;
                    110:                u_long  pltime;
                    111:                u_long  expire;
                    112:                u_short if_index;
                    113:                u_short advrtrs; /* number of advertisement routers */
                    114:                struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
                    115:        } prefix[PRLSTSIZ];
                    116: };
                    117:
                    118: struct in6_ndireq {
                    119:        char ifname[IFNAMSIZ];
                    120:        struct nd_ifinfo ndi;
                    121: };
                    122:
1.6       itojun    123: struct in6_ndifreq {
                    124:        char ifname[IFNAMSIZ];
                    125:        u_long ifindex;
                    126: };
                    127:
                    128:
1.2       itojun    129: /* protocol constants */
                    130: #define MAX_RTR_SOLICITATION_DELAY     1       /*1sec*/
                    131: #define RTR_SOLICITATION_INTERVAL      4       /*4sec*/
                    132: #define MAX_RTR_SOLICITATIONS          3
                    133:
                    134: #define ND6_INFINITE_LIFETIME          0xffffffff
                    135:
                    136: #ifdef _KERNEL
                    137: /* node constants */
                    138: #define MAX_REACHABLE_TIME             3600000 /* msec */
                    139: #define REACHABLE_TIME                 30000   /* msec */
                    140: #define RETRANS_TIMER                  1000    /* msec */
                    141: #define MIN_RANDOM_FACTOR              512     /* 1024 * 0.5 */
                    142: #define MAX_RANDOM_FACTOR              1536    /* 1024 * 1.5 */
                    143: #define ND_COMPUTE_RTIME(x) \
                    144:                (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \
                    145:                ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
                    146:
1.6       itojun    147: TAILQ_HEAD(nd_drhead, nd_defrouter);
1.2       itojun    148: struct nd_defrouter {
1.6       itojun    149:        TAILQ_ENTRY(nd_defrouter) dr_entry;
1.2       itojun    150:        struct  in6_addr rtaddr;
                    151:        u_char  flags;
                    152:        u_short rtlifetime;
                    153:        u_long  expire;
                    154:        struct  ifnet *ifp;
                    155: };
                    156:
                    157: struct nd_prefix {
1.6       itojun    158:        struct ifnet *ndpr_ifp;
1.2       itojun    159:        LIST_ENTRY(nd_prefix) ndpr_entry;
                    160:        struct sockaddr_in6 ndpr_prefix;        /* prefix */
                    161:        struct in6_addr ndpr_mask; /* netmask derived from the prefix */
                    162:        struct in6_addr ndpr_addr; /* address that is derived from the prefix */
                    163:        u_int32_t ndpr_vltime;  /* advertised valid lifetime */
                    164:        u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
                    165:        time_t ndpr_expire;     /* expiration time of the prefix */
                    166:        time_t ndpr_preferred;  /* preferred time of the prefix */
1.6       itojun    167:        struct prf_ra ndpr_flags;
1.2       itojun    168:        /* list of routers that advertise the prefix: */
                    169:        LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
1.6       itojun    170:        u_char  ndpr_plen;
1.2       itojun    171:        struct  ndpr_stateflags {
                    172:                /* if this prefix can be regarded as on-link */
                    173:                u_char onlink : 1;
                    174:        } ndpr_stateflags;
                    175: };
                    176:
                    177: #define ndpr_next              ndpr_entry.le_next
                    178:
1.6       itojun    179: #define ndpr_raf               ndpr_flags
                    180: #define ndpr_raf_onlink                ndpr_flags.onlink
                    181: #define ndpr_raf_auto          ndpr_flags.autonomous
1.2       itojun    182:
                    183: #define ndpr_statef_onlink     ndpr_stateflags.onlink
                    184: #define ndpr_statef_addmark    ndpr_stateflags.addmark
                    185:
                    186: /*
                    187:  * We keep expired prefix for certain amount of time, for validation purposes.
                    188:  * 1800s = MaxRtrAdvInterval
                    189:  */
                    190: #define NDPR_KEEP_EXPIRED      (1800 * 2)
                    191:
                    192: /*
                    193:  * Message format for use in obtaining information about prefixes
                    194:  * from inet6 sysctl function
                    195:  */
                    196: struct inet6_ndpr_msghdr {
                    197:        u_short inpm_msglen;    /* to skip over non-understood messages */
                    198:        u_char  inpm_version;   /* future binary compatability */
                    199:        u_char  inpm_type;      /* message type */
                    200:        struct in6_addr inpm_prefix;
                    201:        u_long  prm_vltim;
                    202:        u_long  prm_pltime;
                    203:        u_long  prm_expire;
                    204:        u_long  prm_preferred;
                    205:        struct in6_prflags prm_flags;
                    206:        u_short prm_index;      /* index for associated ifp */
                    207:        u_char  prm_plen;       /* length of prefix in bits */
                    208: };
                    209:
                    210: #define prm_raf_onlink         prm_flags.prf_ra.onlink
                    211: #define prm_raf_auto           prm_flags.prf_ra.autonomous
                    212:
                    213: #define prm_statef_onlink      prm_flags.prf_state.onlink
                    214:
                    215: #define prm_rrf_decrvalid      prm_flags.prf_rr.decrvalid
                    216: #define prm_rrf_decrprefd      prm_flags.prf_rr.decrprefd
                    217:
                    218: #define ifpr2ndpr(ifpr)        ((struct nd_prefix *)(ifpr))
                    219: #define ndpr2ifpr(ndpr)        ((struct ifprefix *)(ndpr))
                    220:
                    221: struct nd_pfxrouter {
                    222:        LIST_ENTRY(nd_pfxrouter) pfr_entry;
                    223: #define pfr_next pfr_entry.le_next
                    224:        struct nd_defrouter *router;
                    225: };
                    226:
                    227: LIST_HEAD(nd_prhead, nd_prefix);
                    228:
                    229: /* nd6.c */
                    230: extern int nd6_prune;
                    231: extern int nd6_delay;
                    232: extern int nd6_umaxtries;
                    233: extern int nd6_mmaxtries;
                    234: extern int nd6_useloopback;
1.14.4.1! itojun    235: extern int nd6_maxnudhint;
1.2       itojun    236: extern struct llinfo_nd6 llinfo_nd6;
                    237: extern struct nd_ifinfo *nd_ifinfo;
                    238: extern struct nd_drhead nd_defrouter;
                    239: extern struct nd_prhead nd_prefix;
1.10      thorpej   240:
                    241: extern struct callout nd6_timer_ch;
1.2       itojun    242:
1.6       itojun    243: /* nd6_rtr.c */
                    244: extern int nd6_defifindex;
                    245:
1.2       itojun    246: union nd_opts {
                    247:        struct nd_opt_hdr *nd_opt_array[9];
                    248:        struct {
                    249:                struct nd_opt_hdr *zero;
                    250:                struct nd_opt_hdr *src_lladdr;
                    251:                struct nd_opt_hdr *tgt_lladdr;
                    252:                struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */
                    253:                struct nd_opt_rd_hdr *rh;
                    254:                struct nd_opt_mtu *mtu;
                    255:                struct nd_opt_hdr *search;      /* multiple opts */
                    256:                struct nd_opt_hdr *last;        /* multiple opts */
                    257:                int done;
                    258:                struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
                    259:        } nd_opt_each;
                    260: };
                    261: #define nd_opts_src_lladdr     nd_opt_each.src_lladdr
                    262: #define nd_opts_tgt_lladdr     nd_opt_each.tgt_lladdr
                    263: #define nd_opts_pi             nd_opt_each.pi_beg
                    264: #define nd_opts_pi_end         nd_opt_each.pi_end
                    265: #define nd_opts_rh             nd_opt_each.rh
                    266: #define nd_opts_mtu            nd_opt_each.mtu
                    267: #define nd_opts_search         nd_opt_each.search
                    268: #define nd_opts_last           nd_opt_each.last
                    269: #define nd_opts_done           nd_opt_each.done
                    270:
                    271: /* XXX: need nd6_var.h?? */
                    272: /* nd6.c */
                    273: void nd6_init __P((void));
                    274: void nd6_ifattach __P((struct ifnet *));
1.13      itojun    275: int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *));
1.2       itojun    276: void nd6_option_init __P((void *, int, union nd_opts *));
                    277: struct nd_opt_hdr *nd6_option __P((union nd_opts *));
                    278: int nd6_options __P((union nd_opts *));
                    279: struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *));
                    280: void nd6_setmtu __P((struct ifnet *));
                    281: void nd6_timer __P((void *));
1.8       itojun    282: void nd6_purge __P((struct ifnet *));
1.2       itojun    283: void nd6_free __P((struct rtentry *));
1.14.4.1! itojun    284: void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int));
1.2       itojun    285: int nd6_resolve __P((struct ifnet *, struct rtentry *,
                    286:                     struct mbuf *, struct sockaddr *, u_char *));
                    287: void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *));
                    288: void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *));
                    289: int nd6_ioctl __P((u_long, caddr_t, struct ifnet *));
                    290: struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *,
1.5       itojun    291:        char *, int, int, int));
1.2       itojun    292: /* for test */
1.14      itojun    293: int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *,
                    294:                    struct sockaddr_in6 *, struct rtentry *));
1.2       itojun    295: int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *,
                    296:                         struct sockaddr *, u_char *));
                    297:
                    298: /* nd6_nbr.c */
                    299: void nd6_na_input __P((struct mbuf *, int, int));
                    300: void nd6_na_output __P((struct ifnet *, struct in6_addr *,
1.9       itojun    301:                        struct in6_addr *, u_long, int, struct sockaddr *));
1.2       itojun    302: void nd6_ns_input __P((struct mbuf *, int, int));
                    303: void nd6_ns_output __P((struct ifnet *, struct in6_addr *,
                    304:                        struct in6_addr *, struct llinfo_nd6 *, int));
                    305: caddr_t nd6_ifptomac __P((struct ifnet *));
                    306: void nd6_dad_start __P((struct ifaddr *, int *));
                    307: void nd6_dad_duplicated __P((struct ifaddr *));
                    308:
                    309: /* nd6_rtr.c */
                    310: void nd6_rs_input __P((struct mbuf *, int, int));
                    311: void nd6_ra_input __P((struct mbuf *, int, int));
                    312: void prelist_del __P((struct nd_prefix *));
                    313: void defrouter_addreq __P((struct nd_defrouter *));
                    314: void defrouter_delreq __P((struct nd_defrouter *, int));
1.6       itojun    315: void defrouter_select __P((void));
1.2       itojun    316: void defrtrlist_del __P((struct nd_defrouter *));
                    317: void prelist_remove __P((struct nd_prefix *));
                    318: int prelist_update __P((struct nd_prefix *, struct nd_defrouter *,
                    319:        struct mbuf *));
1.6       itojun    320: void pfxlist_onlink_check __P((void));
1.2       itojun    321: struct nd_defrouter *defrouter_lookup __P((struct in6_addr *,
                    322:                                           struct ifnet *));
                    323: int in6_ifdel __P((struct ifnet *, struct in6_addr *));
                    324: int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr));
                    325: void rt6_flush __P((struct in6_addr *, struct ifnet *));
1.6       itojun    326: int nd6_setdefaultiface __P((int));
1.2       itojun    327:
                    328: #endif /* _KERNEL */
                    329:
                    330: #endif /* _NETINET6_ND6_H_ */

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