/* * @(#)db.h 4.16 (Berkeley) 6/1/90 * $Id: db.h,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $ */ /* * ++Copyright++ 1985, 1990 * - * 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. * - * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. * - * --Copyright-- */ /* * 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_int32_t d_ttl; /* time to live */ /* if d_zone == DB_Z_CACHE, then * d_ttl is actually the time when * the record will expire. * otherwise (for authoritative * primary and secondary zones), * d_ttl is the time to live. */ #ifdef CRED u_char d_flags; u_char d_cred; /* level of credibility */ #else u_short d_flags; #endif 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_int32_t d_nstime; /* NS response time, milliseconds */ u_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 */ #ifdef CRED /* * d_cred definitions */ #define DB_C_AUTH 3 /* authoritative answer - best */ #define DB_C_ANSWER 2 /* non-authoritative answer */ #define DB_C_ADDITIONAL 1 /* additional data */ #define DB_C_CACHE 0 /* cache - worst */ extern char *MkCredStr(); /* see db_dump.c */ #endif /*CRED*/ 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 */ }; #if INVQ struct invbuf { struct invbuf *i_next; /* linked list */ struct namebuf *i_dname[INVBLKSZ]; /* domain name */ }; #endif 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 hashbuf *fcachetab; /* hash tbl for cache read from file*/ #if INVQ extern struct invbuf *invtab[]; /* inverse hash table */ extern struct invbuf *saveinv(); #endif extern struct namebuf *nlookup(); extern struct namebuf *savename(); #ifdef DMALLOC extern struct databuf *savedata_tagged(); #define savedata(class, type, ttl, data, size) \ savedata_tagged(__FILE__, __LINE__, class, type, ttl, data, size) #else extern struct databuf *savedata(); #endif extern struct databuf *rm_datum(); /* ns_req.c */ #ifdef __STDC__ extern struct namebuf *rm_name(struct namebuf *np, struct namebuf **pp, struct namebuf*pnp); #else extern struct namebuf *rm_name(); #endif extern struct hashbuf *savehash(); extern char *savestr(); /* db_glue.c */