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PATH: usr / include / bind9 / dns

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

/* $Id: rriterator.h,v 1.4 2011/11/01 23:47:00 tbox Exp $ */

#ifndef DNS_RRITERATOR_H
#define DNS_RRITERATOR_H 1

/*****
 ***** Module Info
 *****/

/*! \file dns/rriterator.h
 * \brief
 * Functions for "walking" a zone database, visiting each RR or RRset in turn.
 */

/*****
 ***** Imports
 *****/

#include <isc/lang.h>
#include <isc/magic.h>
#include <isc/ondestroy.h>
#include <isc/stdtime.h>

#include <dns/db.h>
#include <dns/dbiterator.h>
#include <dns/fixedname.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataset.h>
#include <dns/rdatasetiter.h>
#include <dns/types.h>

ISC_LANG_BEGINDECLS

/*****
 ***** Types
 *****/

/*%
 * A dns_rriterator_t is an iterator that iterates over an entire database,
 * returning one RR at a time, in some arbitrary order.
 */

typedef struct dns_rriterator {
	unsigned int		magic;
	isc_result_t		result;
	dns_db_t		*db;
	dns_dbiterator_t 	*dbit;
	dns_dbversion_t 	*ver;
	isc_stdtime_t		now;
	dns_dbnode_t		*node;
	dns_fixedname_t		fixedname;
	dns_rdatasetiter_t 	*rdatasetit;
	dns_rdataset_t 		rdataset;
	dns_rdata_t		rdata;
} dns_rriterator_t;

#define RRITERATOR_MAGIC		ISC_MAGIC('R', 'R', 'I', 't')
#define VALID_RRITERATOR(m)		ISC_MAGIC_VALID(m, RRITERATOR_MAGIC)

isc_result_t
dns_rriterator_init(dns_rriterator_t *it, dns_db_t *db,
		       dns_dbversion_t *ver, isc_stdtime_t now);
/*%
 * Initialize an rriterator; sets the cursor to the origin node
 * of the database.
 *
 * Requires:
 *
 * \li	'db' is a valid database.
 *
 * Returns:
 *
 * \li	#ISC_R_SUCCESS
 * \li	#ISC_R_NOMEMORY
 */

isc_result_t
dns_rriterator_first(dns_rriterator_t *it);
/*%<
 * Move the rriterator cursor to the first rdata in the database.
 *
 * Requires:
 *\li	'it' is a valid, initialized rriterator
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOMORE			There are no rdata in the set.
 */

isc_result_t
dns_rriterator_nextrrset(dns_rriterator_t *it);
/*%<
 * Move the rriterator cursor to the next rrset in the database,
 * skipping over any remaining records that have the same rdatatype
 * as the current one.
 *
 * Requires:
 *\li	'it' is a valid, initialized rriterator
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOMORE			No more rrsets in the database
 */

isc_result_t
dns_rriterator_next(dns_rriterator_t *it);
/*%<
 * Move the rriterator cursor to the next rrset in the database,
 * skipping over any remaining records that have the same rdatatype
 * as the current one.
 *
 * Requires:
 *\li	'it' is a valid, initialized rriterator
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOMORE			No more records in the database
 */

void
dns_rriterator_current(dns_rriterator_t *it, dns_name_t **name,
			  isc_uint32_t *ttl, dns_rdataset_t **rdataset,
			  dns_rdata_t **rdata);
/*%<
 * Make '*name' refer to the current name.  If 'rdataset' is not NULL,
 * make '*rdataset' refer to the current * rdataset.  If '*rdata' is not
 * NULL, make '*rdata' refer to the current record.
 *
 * Requires:
 *\li	'*name' is a valid name object
 *\li	'rdataset' is NULL or '*rdataset' is NULL
 *\li	'rdata' is NULL or '*rdata' is NULL
 *
 * Ensures:
 *\li	'rdata' refers to the rdata at the rdata cursor location of
 *\li	'rdataset'.
 */

void
dns_rriterator_pause(dns_rriterator_t *it);
/*%<
 * Pause rriterator.  Frees any locks held by the database iterator.
 * Callers should use this routine any time they are not going to
 * execute another rriterator method in the immediate future.
 *
 * Requires:
 *\li	'it' is a valid iterator.
 *
 * Ensures:
 *\li	Any database locks being held for efficiency of iterator access are
 *	released.
 */

void
dns_rriterator_destroy(dns_rriterator_t *it);
/*%<
 * Shut down and free resources in rriterator 'it'.
 *
 * Requires:
 *
 *\li	'it' is a valid iterator.
 *
 * Ensures:
 *
 *\li	All resources used by the rriterator are freed.
 */

ISC_LANG_ENDDECLS

#endif /* DNS_RRITERATOR_H */

[-] diff.h [edit]
[-] callbacks.h [edit]
[-] badcache.h [edit]
[-] version.h [edit]
[-] rdataslab.h [edit]
[-] nsec3.h [edit]
[-] dlz_dlopen.h [edit]
[-] validator.h [edit]
[-] rdatasetiter.h [edit]
[-] rriterator.h [edit]
[-] rdata.h [edit]
[-] stats.h [edit]
[+] ..
[-] opcode.h [edit]
[-] dbtable.h [edit]
[-] geoip.h [edit]
[-] catz.h [edit]
[-] journal.h [edit]
[-] zt.h [edit]
[-] tkey.h [edit]
[-] rdatatype.h [edit]
[-] result.h [edit]
[-] view.h [edit]
[-] acache.h [edit]
[-] message.h [edit]
[-] byaddr.h [edit]
[-] dsdigest.h [edit]
[-] rdatastruct.h [edit]
[-] clientinfo.h [edit]
[-] rbt.h [edit]
[-] sdlz.h [edit]
[-] cache.h [edit]
[-] zonekey.h [edit]
[-] acl.h [edit]
[-] enumclass.h [edit]
[-] log.h [edit]
[-] portlist.h [edit]
[-] rdataset.h [edit]
[-] tcpmsg.h [edit]
[-] client.h [edit]
[-] zone.h [edit]
[-] time.h [edit]
[-] xfrin.h [edit]
[-] secproto.h [edit]
[-] rcode.h [edit]
[-] dyndb.h [edit]
[-] peer.h [edit]
[-] ttl.h [edit]
[-] types.h [edit]
[-] rrl.h [edit]
[-] rootns.h [edit]
[-] keytable.h [edit]
[-] forward.h [edit]
[-] ipkeylist.h [edit]
[-] timer.h [edit]
[-] ds.h [edit]
[-] dnstap.h [edit]
[-] dispatch.h [edit]
[-] private.h [edit]
[-] ssu.h [edit]
[-] order.h [edit]
[-] update.h [edit]
[-] rdatalist.h [edit]
[-] lookup.h [edit]
[-] db.h [edit]
[-] name.h [edit]
[-] ncache.h [edit]
[-] nta.h [edit]
[-] ecdb.h [edit]
[-] iptable.h [edit]
[-] resolver.h [edit]
[-] masterdump.h [edit]
[-] nsec.h [edit]
[-] cert.h [edit]
[-] soa.h [edit]
[-] bit.h [edit]
[-] events.h [edit]
[-] dnssec.h [edit]
[-] dbiterator.h [edit]
[-] request.h [edit]
[-] keyflags.h [edit]
[-] secalg.h [edit]
[-] dns64.h [edit]
[-] edns.h [edit]
[-] enumtype.h [edit]
[-] fixedname.h [edit]
[-] tsec.h [edit]
[-] lib.h [edit]
[-] keyvalues.h [edit]
[-] keydata.h [edit]
[-] sdb.h [edit]
[-] adb.h [edit]
[-] compress.h [edit]
[-] rdataclass.h [edit]
[-] dlz.h [edit]
[-] tsig.h [edit]
[-] master.h [edit]
[-] rpz.h [edit]