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0aef8126 WJ |
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(); |