\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5×\D6?\BDê\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2€ \00 $\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4ê\E9\F2á\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /usr/include/bind9/dns/

Viewing File: rriterator.h

/*
 * 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 */