110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
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* Copyright (c) 1985 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and that due credit is given
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* to the University of California at Berkeley. The name of the University
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* may not be used to endorse or promote products derived from this
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* software without specific prior written permission. This software
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* is provided ``as is'' without express or implied warranty.
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*
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* @(#)db.h 1.1 94/10/31 SMI from UCB 4.13 2/17/88
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*/
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/*
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* Global structures and variables for data base routines.
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*/
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#define INVBLKSZ 7 /* # of namebuf pointers per block */
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#define INVHASHSZ 919 /* size of inverse hash table */
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/* max length of data in RR data field */
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#define MAXDATA 256
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/*
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* Hash table structures.
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*/
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struct databuf {
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struct databuf *d_next; /* linked list */
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u_long d_ttl; /* time to live */
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short d_flags;
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short d_zone; /* zone number */
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short d_class; /* class number */
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short d_type; /* type number */
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short d_mark; /* place to mark data */
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short d_size; /* size of data area */
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u_long d_nstime; /* NS response time, milliseconds */
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char d_data[MAXDATA]; /* the data is malloc'ed to size */
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};
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#define DATASIZE(n) (sizeof(struct databuf) - MAXDATA + n)
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/*
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* d_flags definitions
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*/
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#define DB_F_HINT 0x01 /* databuf belongs to fcachetab */
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struct namebuf {
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char *n_dname; /* domain name */
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u_int n_hashval; /* hash value of n_dname */
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struct namebuf *n_next; /* linked list */
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struct databuf *n_data; /* data records */
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struct namebuf *n_parent; /* parent domain */
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struct hashbuf *n_hash; /* hash table for children */
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};
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struct invbuf {
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struct invbuf *i_next; /* linked list */
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struct namebuf *i_dname[INVBLKSZ]; /* domain name */
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};
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struct hashbuf {
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int h_size; /* size of hash table */
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int h_cnt; /* number of entries */
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struct namebuf *h_tab[1]; /* malloc'ed as needed */
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};
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#define HASHSIZE(s) (s*sizeof(struct namebuf *) + 2*sizeof(int))
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#define HASHSHIFT 3
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#define HASHMASK 0x1f
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/*
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* Flags to updatedb
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*/
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#define DB_NODATA 0x01 /* data should not exist */
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#define DB_MEXIST 0x02 /* data must exist */
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#define DB_DELETE 0x04 /* delete data if it exists */
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#define DB_NOTAUTH 0x08 /* must not update authoritative data */
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#define DB_NOHINTS 0x10 /* don't reflect update in fcachetab */
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#define DB_Z_CACHE (0) /* cache-zone-only db_dump() */
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#define DB_Z_ALL (-1) /* normal db_dump() */
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/*
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* Error return codes
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*/
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#define OK 0
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#define NONAME -1
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#define NOCLASS -2
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#define NOTYPE -3
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#define NODATA -4
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#define DATAEXISTS -5
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#define NODBFILE -6
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#define TOOMANYZONES -7
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#define GOODDB -8
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#define NEWDB -9
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#define AUTH -10
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extern struct hashbuf *hashtab; /* root hash table */
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extern struct invbuf *invtab[]; /* inverse hash table */
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extern struct hashbuf *fcachetab; /* hash table for cache read from file*/
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extern struct namebuf *nlookup();
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extern struct namebuf *savename();
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extern struct databuf *savedata();
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extern struct databuf *rm_datum();
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extern struct hashbuf *savehash();
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extern struct invbuf *saveinv();
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extern char *savestr();
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extern char *malloc(), *realloc(), *calloc();
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