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- /*
- * Copyright (c) 1985, 1990 Regents of the University of California.
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
- *
- * @(#)db.h 4.16 (Berkeley) 6/1/90
- */
-
- /*
- * Global structures and variables for data base routines.
- */
-
- #define INVBLKSZ 7 /* # of namebuf pointers per block */
- #define INVHASHSZ 919 /* size of inverse hash table */
-
- /* max length of data in RR data field */
- #define MAXDATA 2048
-
- /*
- * Hash table structures.
- */
- struct databuf {
- struct databuf *d_next; /* linked list */
- u_long d_ttl; /* time to live */
- short d_flags;
- short d_zone; /* zone number */
- short d_class; /* class number */
- short d_type; /* type number */
- short d_mark; /* place to mark data */
- short d_size; /* size of data area */
- u_long d_nstime; /* NS response time, milliseconds */
- char d_data[1]; /* the data is malloc'ed to size */
- };
- #define DATASIZE(n) (sizeof(struct databuf) - 1 + n)
-
- /*
- * d_flags definitions
- */
- #define DB_F_HINT 0x01 /* databuf belongs to fcachetab */
-
- struct namebuf {
- char *n_dname; /* domain name */
- u_int n_hashval; /* hash value of n_dname */
- struct namebuf *n_next; /* linked list */
- struct databuf *n_data; /* data records */
- struct namebuf *n_parent; /* parent domain */
- struct hashbuf *n_hash; /* hash table for children */
- };
-
- struct invbuf {
- struct invbuf *i_next; /* linked list */
- struct namebuf *i_dname[INVBLKSZ]; /* domain name */
- };
-
- struct hashbuf {
- int h_size; /* size of hash table */
- int h_cnt; /* number of entries */
- struct namebuf *h_tab[1]; /* malloc'ed as needed */
- };
- #define HASHSIZE(s) (s*sizeof(struct namebuf *) + 2*sizeof(int))
-
- #define HASHSHIFT 3
- #define HASHMASK 0x1f
-
- /*
- * Flags to updatedb
- */
- #define DB_NODATA 0x01 /* data should not exist */
- #define DB_MEXIST 0x02 /* data must exist */
- #define DB_DELETE 0x04 /* delete data if it exists */
- #define DB_NOTAUTH 0x08 /* must not update authoritative data */
- #define DB_NOHINTS 0x10 /* don't reflect update in fcachetab */
-
- #define DB_Z_CACHE (0) /* cache-zone-only db_dump() */
- #define DB_Z_ALL (-1) /* normal db_dump() */
-
- /*
- * Error return codes
- */
- #define OK 0
- #define NONAME -1
- #define NOCLASS -2
- #define NOTYPE -3
- #define NODATA -4
- #define DATAEXISTS -5
- #define NODBFILE -6
- #define TOOMANYZONES -7
- #define GOODDB -8
- #define NEWDB -9
- #define AUTH -10
-
- extern struct hashbuf *hashtab; /* root hash table */
- extern struct invbuf *invtab[]; /* inverse hash table */
- extern struct hashbuf *fcachetab; /* hash table for cache read from file*/
-
- extern struct namebuf *nlookup();
- extern struct namebuf *savename();
- extern struct databuf *savedata();
- extern struct databuf *rm_datum();
- extern struct hashbuf *savehash();
- extern struct invbuf *saveinv();
- extern char *savestr();
- extern char *malloc(), *realloc(), *calloc();
-