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, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)db.h 4.16 (Berkeley) 6/1/90 34 */ 35 36 /* 37 * Global structures and variables for data base routines. 38 */ 39 40 #define INVBLKSZ 7 /* # of namebuf pointers per block */ 41 #define INVHASHSZ 919 /* size of inverse hash table */ 42 43 /* max length of data in RR data field */ 44 #define MAXDATA 2048 45 46 /* 47 * Hash table structures. 48 */ 49 struct databuf { 50 struct databuf *d_next; /* linked list */ 51 u_long d_ttl; /* time to live */ 52 short d_flags; 53 short d_zone; /* zone number */ 54 short d_class; /* class number */ 55 short d_type; /* type number */ 56 short d_mark; /* place to mark data */ 57 short d_size; /* size of data area */ 58 u_long d_nstime; /* NS response time, milliseconds */ 59 char d_data[1]; /* the data is malloc'ed to size */ 60 }; 61 #define DATASIZE(n) (sizeof(struct databuf) - 1 + n) 62 63 /* 64 * d_flags definitions 65 */ 66 #define DB_F_HINT 0x01 /* databuf belongs to fcachetab */ 67 68 struct namebuf { 69 char *n_dname; /* domain name */ 70 u_int n_hashval; /* hash value of n_dname */ 71 struct namebuf *n_next; /* linked list */ 72 struct databuf *n_data; /* data records */ 73 struct namebuf *n_parent; /* parent domain */ 74 struct hashbuf *n_hash; /* hash table for children */ 75 }; 76 77 struct invbuf { 78 struct invbuf *i_next; /* linked list */ 79 struct namebuf *i_dname[INVBLKSZ]; /* domain name */ 80 }; 81 82 struct hashbuf { 83 int h_size; /* size of hash table */ 84 int h_cnt; /* number of entries */ 85 struct namebuf *h_tab[1]; /* malloc'ed as needed */ 86 }; 87 #define HASHSIZE(s) (s*sizeof(struct namebuf *) + 2*sizeof(int)) 88 89 #define HASHSHIFT 3 90 #define HASHMASK 0x1f 91 92 /* 93 * Flags to updatedb 94 */ 95 #define DB_NODATA 0x01 /* data should not exist */ 96 #define DB_MEXIST 0x02 /* data must exist */ 97 #define DB_DELETE 0x04 /* delete data if it exists */ 98 #define DB_NOTAUTH 0x08 /* must not update authoritative data */ 99 #define DB_NOHINTS 0x10 /* don't reflect update in fcachetab */ 100 101 #define DB_Z_CACHE (0) /* cache-zone-only db_dump() */ 102 #define DB_Z_ALL (-1) /* normal db_dump() */ 103 104 /* 105 * Error return codes 106 */ 107 #define OK 0 108 #define NONAME -1 109 #define NOCLASS -2 110 #define NOTYPE -3 111 #define NODATA -4 112 #define DATAEXISTS -5 113 #define NODBFILE -6 114 #define TOOMANYZONES -7 115 #define GOODDB -8 116 #define NEWDB -9 117 #define AUTH -10 118 119 extern struct hashbuf *hashtab; /* root hash table */ 120 extern struct invbuf *invtab[]; /* inverse hash table */ 121 extern struct hashbuf *fcachetab; /* hash table for cache read from file*/ 122 123 extern struct namebuf *nlookup(); 124 extern struct namebuf *savename(); 125 extern struct databuf *savedata(); 126 extern struct databuf *rm_datum(); 127 extern struct hashbuf *savehash(); 128 extern struct invbuf *saveinv(); 129 extern char *savestr(); 130 extern char *malloc(), *realloc(), *calloc(); 131