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342 lines
11 KiB
C
342 lines
11 KiB
C
/*
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* from db.h 4.16 (Berkeley) 6/1/90
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* $Id: db_defs.h,v 8.48 2002/11/17 14:51:50 marka Exp $
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*/
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/*
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* Copyright (c) 1985, 1990
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/*
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* Portions Copyright (c) 1996-2000 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/*
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* Global definitions for data base routines.
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*/
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/* max length of data in RR data field */
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#define MAXDATA (3*MAXDNAME + 5*INT32SZ)
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/* max length of data in a TXT RR segment */
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#define MAXCHARSTRING 255
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#define DB_ROOT_TIMBUF 3600
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#define TIMBUF 300
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#define DICT_INDEXBITS 24
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#define DICT_MAXLENGTH 127
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#define DICT_INSERT_P 0x0001
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/* Average hash chain depths. */
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#define AVGCH_MARSHAL 5
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#define AVGCH_NLOOKUP 3
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/* Nonstandard maximum class to force better packing. */
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#define ZONE_BITS 24
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#define CLASS_BITS 8
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#define ZONE_MAX ((1<<ZONE_BITS)-1)
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#define CLASS_MAX ((1<<CLASS_BITS)-1)
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/*
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* Hash table structures.
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*/
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/*
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* XXX
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* For IPv6 transport support we need a seperate reference counted
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* database of source addresses and d_addr should become a union with
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* a pointer into that database. A bit can be robbed from d_rode to
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* indicate what the union is being used for. This should require less
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* memory than making d_addr a union of struct in6_addr and struct in_addr.
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*/
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#ifdef CHECK_MAGIC
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#define DATABUF_MAGIC (('D'<<24)|('A'<<16)|('T'<<8)|'A')
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#endif
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struct databuf {
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#ifdef CHECK_MAGIC
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u_int32_t d_magic; /* magic number */
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#endif
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struct databuf *d_next; /* linked list */
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struct in_addr d_addr; /* NS from whence this came */
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u_int32_t d_ttl; /* time to live */
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/* if d_zone == DB_Z_CACHE, then
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* d_ttl is actually the time when
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* the record will expire.
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* otherwise (for authoritative
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* master and slave zones),
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* d_ttl is the time to live.
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*/
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unsigned d_zone :ZONE_BITS; /* zone number or 0 for the cache */
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unsigned d_class :CLASS_BITS; /* class number (nonstandard limit) */
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unsigned d_flags :4; /* DB_F_{??????} */
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unsigned d_secure :2; /* DB_S_{??????} */
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unsigned d_cred :3; /* DB_C_{??????} */
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unsigned d_clev :6;
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unsigned d_rcode :4; /* rcode for negative caching */
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unsigned d_mark :3; /* place to mark data */
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unsigned d_noedns :1; /* this server does not support edns */
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int16_t d_type; /* type number */
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int16_t d_size; /* size of data area */
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u_int32_t d_rcnt;
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#ifdef HITCOUNTS
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u_int32_t d_hitcnt; /* Number of requests for this data. */
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#endif /* HITCOUNTS */
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u_int16_t d_nstime; /* NS response time, milliseconds */
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u_char d_data[sizeof(void*)]; /* dynamic (padded) */
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};
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#define BIND_DATASIZE(n) (sizeof(struct databuf) - sizeof(void*) + n)
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#ifdef HITCOUNTS
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extern u_int32_t db_total_hits;
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#endif /* HITCOUNTS */
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#ifdef BIND_UPDATE
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/*
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* d_mark definitions
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*/
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#define D_MARK_DELETED 0x01
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#define D_MARK_ADDED 0x02
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#define D_MARK_FOUND 0x04
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#endif
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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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#define DB_F_ACTIVE 0x02 /* databuf is linked into a cache */
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#define DB_F_FREE 0x04 /* databuf has been freed */
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#define DB_F_LAME 0x08 /* databuf may refer to lame server */
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/*
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* d_cred definitions
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*/
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#define DB_C_ZONE 4 /* authoritative zone - best */
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#define DB_C_AUTH 3 /* authoritative answer */
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#define DB_C_ANSWER 2 /* non-authoritative answer */
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#define DB_C_ADDITIONAL 1 /* additional data */
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#define DB_C_CACHE 0 /* cache - worst */
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/*
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* d_secure definitions
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*/
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#define DB_S_SECURE 2 /* secure (verified) data */
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#define DB_S_INSECURE 1 /* insecure data */
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#define DB_S_FAILED 0 /* data that failed a security check */
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struct namebuf {
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u_int n_hashval; /* hash value of _n_name */
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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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union {
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char _n_name[sizeof(void*)];
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unsigned char _n_len[sizeof(void*)];
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} _n; /* Counted str (dynamic). */
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};
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#define NAMESIZE(n) (sizeof(struct namebuf) - sizeof(void*) + 1 + n + 1)
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#define NAMELEN(nb) ((((nb)._n._n_len))[0])
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#define NAME(nb) ((nb)._n._n_name + 1)
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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]; /* allocated as needed */
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};
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#define HASHSIZE(s) (sizeof(struct hashbuf) + (s-1) * sizeof(struct namebuf *))
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#define HASHSHIFT 3
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#define HASHMASK 0x1f
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#define HASHROTATE(v) \
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(((v) << HASHSHIFT) | ((v) >> ((sizeof(v) * 8) - HASHSHIFT)))
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#define HASHLOWER(c) ((isascii(c) && isupper(c)) ? tolower(c) : (c))
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#define HASHIMILATE(v,c) ((v) = (HASHROTATE(v)) + (HASHLOWER(c) & HASHMASK))
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#define TSIG_BUF_SIZE 640
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#define TSIG_SIG_SIZE 20
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struct tsig_record {
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u_int8_t sig[TSIG_SIG_SIZE];
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struct dst_key *key;
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int siglen;
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int tsig_size;
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};
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struct sig_record {
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u_int16_t sig_type_n;
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u_int8_t sig_alg_n, sig_labels_n;
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u_int32_t sig_ottl_n, sig_exp_n, sig_time_n;
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u_int16_t sig_keyid_n;
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};
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/* This is the wire format size of "struct sig_record", i.e., no padding. */
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#define SIG_HDR_SIZE 18
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struct dnode {
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struct databuf *dp;
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struct dnode *dn_next;
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int line;
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const char *file;
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};
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typedef struct dnode * dlist;
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struct db_rrset {
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dlist rr_list;
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dlist rr_sigs;
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char *rr_name;
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int16_t rr_class;
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int16_t rr_type;
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struct db_rrset *rr_next;
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};
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#define DBHASHSIZE(s) (sizeof(struct hashbuf) + \
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(s-1) * sizeof(struct db_rrset *))
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#define SIG_COVERS(dp) (ns_get16(dp->d_data))
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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_PRIMING 0x20 /* is this update the result of priming? */
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#define DB_MERGE 0x40 /* make no control on rr in db_update (for ixfr) */
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#define DB_REPLACE 0x80 /* replace data if it exists */
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#define DB_Z_CACHE 0 /* cache-zone-only db_dump() */
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#define DB_Z_ALL 65535 /* normal db_dump() */
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#define DB_Z_SPECIAL(z) ((z) == DB_Z_CACHE || (z) == DB_Z_ALL)
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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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#ifdef BIND_UPDATE
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#define SERIAL (-11)
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#endif
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#define CNAMEANDOTHER (-12)
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#define DNSSECFAIL (-13) /* db_set_update */
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#define NONGLUE (-14)
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/*
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* getnum() options
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*/
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#define GETNUM_NONE 0x00 /* placeholder */
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#define GETNUM_SERIAL 0x01 /* treat as serial number */
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#define GETNUM_SCALED 0x02 /* permit "k", "m" suffixes, scale result */
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/*
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* db_load() options
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*/
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#define ISNOTIXFR 0
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#define ISIXFR 1
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#define ISAXFRIXFR 2
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/*
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* Database access abstractions.
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*/
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#define foreach_rr(dp, np, ty, cl, zn) \
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for ((dp) = (np)->n_data; (dp) != NULL; (dp) = (dp)->d_next) \
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if (!match(dp, (cl), (ty))) \
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continue; \
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else if (((zn) == DB_Z_CACHE) \
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? stale(dp) \
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: (zn) != (dp)->d_zone) \
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continue; \
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else if ((dp)->d_rcode) \
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continue; \
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else \
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/* Caller code follows in sequence. */
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#define DRCNTINC(x) \
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do { \
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if (++((x)->d_rcnt) == 0) \
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ns_panic(ns_log_db, 1, "++d_rcnt == 0"); \
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} while (0)
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#define DRCNTDEC(x) \
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do { \
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if (((x)->d_rcnt)-- == 0) \
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ns_panic(ns_log_db, 1, "d_rcnt-- == 0"); \
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} while (0)
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#define ISVALIDGLUE(xdp) ((xdp)->d_type == T_NS || (xdp)->d_type == T_A \
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|| (xdp)->d_type == T_AAAA || (xdp)->d_type == ns_t_a6)
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