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Annotation of 43BSDReno/usr.sbin/named/db.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1985, 1990 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted provided
        !             6:  * that: (1) source distributions retain this entire copyright notice and
        !             7:  * comment, and (2) distributions including binaries display the following
        !             8:  * acknowledgement:  ``This product includes software developed by the
        !             9:  * University of California, Berkeley and its contributors'' in the
        !            10:  * documentation or other materials provided with the distribution and in
        !            11:  * all advertising materials mentioning features or use of this software.
        !            12:  * Neither the name of the University nor the names of its contributors may
        !            13:  * be used to endorse or promote products derived from this software without
        !            14:  * specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  *
        !            19:  *     @(#)db.h        4.16 (Berkeley) 6/1/90
        !            20:  */
        !            21: 
        !            22: /*
        !            23:  * Global structures and variables for data base routines.
        !            24:  */
        !            25: 
        !            26: #define INVBLKSZ       7       /* # of namebuf pointers per block */
        !            27: #define INVHASHSZ      919     /* size of inverse hash table */
        !            28: 
        !            29:        /* max length of data in RR data field */
        !            30: #define MAXDATA                2048
        !            31: 
        !            32: /*
        !            33:  * Hash table structures.
        !            34:  */
        !            35: struct databuf {
        !            36:        struct  databuf *d_next;        /* linked list */
        !            37:        u_long  d_ttl;                  /* time to live */
        !            38:        short   d_flags;
        !            39:        short   d_zone;                 /* zone number */
        !            40:        short   d_class;                /* class number */
        !            41:        short   d_type;                 /* type number */
        !            42:        short   d_mark;                 /* place to mark data */
        !            43:        short   d_size;                 /* size of data area */
        !            44:        u_long  d_nstime;               /* NS response time, milliseconds */
        !            45:        char    d_data[1];              /* the data is malloc'ed to size */
        !            46: };
        !            47: #define DATASIZE(n) (sizeof(struct databuf) - 1 + n)
        !            48: 
        !            49: /*
        !            50:  * d_flags definitions
        !            51:  */
        !            52: #define DB_F_HINT       0x01   /* databuf belongs to fcachetab */
        !            53: 
        !            54: struct namebuf {
        !            55:        char    *n_dname;               /* domain name */
        !            56:        u_int   n_hashval;              /* hash value of n_dname */
        !            57:        struct  namebuf *n_next;        /* linked list */
        !            58:        struct  databuf *n_data;        /* data records */
        !            59:        struct  namebuf *n_parent;      /* parent domain */
        !            60:        struct  hashbuf *n_hash;        /* hash table for children */
        !            61: };
        !            62: 
        !            63: struct invbuf {
        !            64:        struct  invbuf *i_next;         /* linked list */
        !            65:        struct  namebuf *i_dname[INVBLKSZ];     /* domain name */
        !            66: };
        !            67: 
        !            68: struct hashbuf {
        !            69:        int     h_size;                 /* size of hash table */
        !            70:        int     h_cnt;                  /* number of entries */
        !            71:        struct  namebuf *h_tab[1];      /* malloc'ed as needed */
        !            72: };
        !            73: #define HASHSIZE(s) (s*sizeof(struct namebuf *) + 2*sizeof(int))
        !            74: 
        !            75: #define HASHSHIFT      3
        !            76: #define HASHMASK       0x1f
        !            77: 
        !            78: /*
        !            79:  * Flags to updatedb
        !            80:  */
        !            81: #define DB_NODATA      0x01    /* data should not exist */
        !            82: #define DB_MEXIST      0x02    /* data must exist */
        !            83: #define DB_DELETE      0x04    /* delete data if it exists */
        !            84: #define DB_NOTAUTH     0x08    /* must not update authoritative data */
        !            85: #define DB_NOHINTS      0x10   /* don't reflect update in fcachetab */
        !            86: 
        !            87: #define DB_Z_CACHE      (0)    /* cache-zone-only db_dump()  */
        !            88: #define DB_Z_ALL        (-1)   /* normal db_dump() */
        !            89: 
        !            90: /*
        !            91:  * Error return codes
        !            92:  */
        !            93: #define OK             0
        !            94: #define NONAME         -1
        !            95: #define NOCLASS                -2
        !            96: #define NOTYPE         -3
        !            97: #define NODATA         -4
        !            98: #define DATAEXISTS     -5
        !            99: #define NODBFILE       -6
        !           100: #define TOOMANYZONES   -7
        !           101: #define GOODDB         -8
        !           102: #define NEWDB          -9
        !           103: #define AUTH           -10
        !           104: 
        !           105: extern struct hashbuf *hashtab;                /* root hash table */
        !           106: extern struct invbuf *invtab[];                /* inverse hash table */
        !           107: extern struct hashbuf *fcachetab;      /* hash table for cache read from file*/
        !           108: 
        !           109: extern struct namebuf *nlookup();
        !           110: extern struct namebuf *savename();
        !           111: extern struct databuf *savedata();
        !           112: extern struct databuf *rm_datum();
        !           113: extern struct hashbuf *savehash();
        !           114: extern struct invbuf *saveinv();
        !           115: extern char *savestr();
        !           116: extern char *malloc(), *realloc(), *calloc();

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