/*

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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")

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*

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* This Source Code Form is subject to the terms of the Mozilla Public

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* License, v. 2.0. If a copy of the MPL was not distributed with this

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* file, you can obtain one at https://mozilla.org/MPL/2.0/.

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*

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* See the COPYRIGHT file distributed with this work for additional

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* information regarding copyright ownership.

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*/

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#ifndef DNS_CATZ_H

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#define DNS_CATZ_H 1

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#include <inttypes.h>

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#include <stdbool.h>

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#include <isc/ht.h>

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#include <isc/lang.h>

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#include <isc/rwlock.h>

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#include <isc/time.h>

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#include <isc/timer.h>

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#include <dns/db.h>

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#include <dns/fixedname.h>

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#include <dns/ipkeylist.h>

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#include <dns/rdata.h>

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#include <dns/types.h>

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ISC_LANG_BEGINDECLS

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#define DNS_CATZ_ERROR_LEVEL ISC_LOG_WARNING

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#define DNS_CATZ_INFO_LEVEL ISC_LOG_INFO

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#define DNS_CATZ_DEBUG_LEVEL1 ISC_LOG_DEBUG(1)

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#define DNS_CATZ_DEBUG_LEVEL2 ISC_LOG_DEBUG(2)

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#define DNS_CATZ_DEBUG_LEVEL3 ISC_LOG_DEBUG(3)

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#define DNS_CATZ_DEBUG_QUIET (DNS_CATZ_DEBUG_LEVEL3+1)

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/*

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* Catalog Zones functions and structures.

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*/

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/*

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* Options for a member zone in a catalog

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*/

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struct dns_catz_entry_options {

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/*

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* Options that can be overridden in catalog zone

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*/

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/* default-masters definition */

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dns_ipkeylist_t masters;

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/* both as text in config format, NULL if none */

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isc_buffer_t *allow_query;

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isc_buffer_t *allow_transfer;

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/*

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* Options that are only set in named.conf

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*/

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/* zone-directory definition */

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char *zonedir;

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/* zone should not be stored on disk (no 'file' statement in def */

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bool in_memory;

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/*

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* Minimal interval between catalog zone updates, if a new version

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* of catalog zone is received before this time the update will be

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* postponed. This is a global option for the whole catalog zone.

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*/

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uint32_t min_update_interval;

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};

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void

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dns_catz_options_init(dns_catz_options_t *options);

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/*%<

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* Initialize 'options' to NULL values.

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*

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* Requires:

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* \li 'options' to be non NULL.

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*/

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void

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dns_catz_options_free(dns_catz_options_t *options, isc_mem_t *mctx);

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/*%<

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* Free 'options' contents into 'mctx'. ('options' itself is not freed.)

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*

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* Requires:

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* \li 'options' to be non NULL.

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* \li 'mctx' to be a valid memory context.

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*/

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isc_result_t

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dns_catz_options_copy(isc_mem_t *mctx, const dns_catz_options_t *opts,

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dns_catz_options_t *nopts);

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/*%<

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* Duplicate 'opts' into 'nopts', allocating space from 'mctx'.

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*

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* Requires:

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* \li 'mctx' to be a valid memory context.

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* \li 'options' to be non NULL and valid options.

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* \li 'nopts' to be non NULL.

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*/

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isc_result_t

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dns_catz_options_setdefault(isc_mem_t *mctx, const dns_catz_options_t *defaults,

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dns_catz_options_t *opts);

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/*%<

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* Replace empty values in 'opts' with values from 'defaults'

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*

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* Requires:

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* \li 'mctx' to be a valid memory context.

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* \li 'defaults' to be non NULL and valid options.

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* \li 'opts' to be non NULL.

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*/

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dns_name_t *

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dns_catz_entry_getname(dns_catz_entry_t *entry);

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/*%<

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* Get domain name for 'entry'

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*

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* Requires:

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* \li 'entry' to be non NULL.

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*

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* Returns:

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* \li domain name for entry.

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*/

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isc_result_t

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dns_catz_entry_new(isc_mem_t *mctx, const dns_name_t *domain,

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dns_catz_entry_t **nentryp);

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/*%<

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* Allocate a new catz_entry on 'mctx', with the name 'domain'

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*

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* Requires:

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* \li 'mctx' to be a valid memory context.

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* \li 'domain' to be valid dns_name or NULL.

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* \li 'nentryp' to be non NULL, *nentryp to be NULL.

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*

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* Returns:

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* \li ISC_R_SUCCESS on success

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* \li ISC_R_NOMEMORY on allocation failure

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*/

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isc_result_t

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dns_catz_entry_copy(dns_catz_zone_t *zone, const dns_catz_entry_t *entry,

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dns_catz_entry_t **nentryp);

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/*%<

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* Allocate a new catz_entry and deep copy 'entry' into 'nentryp'.

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*

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* Requires:

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* \li 'mctx' to be a valid memory context.

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* \li 'entry' to be non NULL.

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* \li 'nentryp' to be non NULL, *nentryp to be NULL.

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*

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* Returns:

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* \li ISC_R_SUCCESS on success

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* \li ISC_R_NOMEMORY on allocation failure

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*/

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void

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dns_catz_entry_attach(dns_catz_entry_t *entry, dns_catz_entry_t **entryp);

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/*%<

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* Attach an entry

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*

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* Requires:

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* \li 'entry' is a valid dns_catz_entry_t.

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* \li 'entryp' is not NULL and '*entryp' is NULL.

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*/

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void

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dns_catz_entry_detach(dns_catz_zone_t *zone, dns_catz_entry_t **entryp);

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/*%<

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* Detach an entry, free if no further references

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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* \li 'entryp' is not NULL and '*entryp' is not NULL.

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*/

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bool

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dns_catz_entry_validate(const dns_catz_entry_t *entry);

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/*%<

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* Validate whether entry is correct.

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* (NOT YET IMPLEMENTED: always returns true)

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*

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* Requires:

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*\li 'entry' is a valid dns_catz_entry_t.

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*/

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bool

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dns_catz_entry_cmp(const dns_catz_entry_t *ea, const dns_catz_entry_t *eb);

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/*%<

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* Deep compare two entries

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*

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* Requires:

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* \li 'ea' is a valid dns_catz_entry_t.

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* \li 'eb' is a valid dns_catz_entry_t.

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*

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* Returns:

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* \li 'true' if entries are the same.

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* \li 'false' if the entries differ.

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*/

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void

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dns_catz_zone_attach(dns_catz_zone_t *zone, dns_catz_zone_t **zonep);

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/*%<

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* Attach a catzone

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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* \li 'zonep' is not NULL and '*zonep' is NULL.

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*/

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void

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dns_catz_zone_detach(dns_catz_zone_t** zonep);

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/*%<

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* Detach a zone, free if no further references

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*

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* Requires:

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* \li 'zonep' is not NULL and '*zonep' is not NULL.

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*/

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isc_result_t

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dns_catz_new_zone(dns_catz_zones_t *catzs, dns_catz_zone_t **zonep,

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const dns_name_t *name);

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/*%<

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* Allocate a new catz zone on catzs mctx

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'zonep' is not NULL and '*zonep' is NULL.

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* \li 'name' is a valid dns_name_t.

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*

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*/

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dns_name_t *

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dns_catz_zone_getname(dns_catz_zone_t *zone);

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/*%<

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* Get catalog zone name

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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*/

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dns_catz_options_t *

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dns_catz_zone_getdefoptions(dns_catz_zone_t *zone);

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/*%<

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* Get default member zone options for catalog zone 'zone'

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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*/

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void

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dns_catz_zone_resetdefoptions(dns_catz_zone_t *zone);

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/*%<

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* Reset the default member zone options for catalog zone 'zone' to

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* the default values.

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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*/

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isc_result_t

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dns_catz_zones_merge(dns_catz_zone_t *target, dns_catz_zone_t *newzone);

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/*%<

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* Merge 'newzone' into 'target', calling addzone/delzone/modzone

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* (from zone->catzs->zmm) for appropriate member zones.

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*

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* Requires:

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* \li 'orig' is a valid dns_catz_zone_t.

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* \li 'newzone' is not NULL and '*newzone' is not NULL.

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*

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*/

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isc_result_t

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dns_catz_update_process(dns_catz_zones_t *catzs, dns_catz_zone_t *zone,

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dns_name_t *src_name, dns_rdataset_t *rdataset);

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/*%<

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* Process a single rdataset from a catalog zone 'zone' update, src_name is the

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* record name.

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'zone' is a valid dns_catz_zone_t.

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* \li 'src_name' is a valid dns_name_t.

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* \li 'rdataset' is valid rdataset.

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*/

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isc_result_t

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dns_catz_generate_masterfilename(dns_catz_zone_t *zone, dns_catz_entry_t *entry,

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isc_buffer_t **buffer);

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/*%<

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* Generate master file name and put it into *buffer (might be reallocated).

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* The general format of the file name is:

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* __catz__catalog.zone.name__member_zone_name.db

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* But if it's too long it's shortened to:

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* __catz__unique_hash_generated_from_the_above.db

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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* \li 'entry' is a valid dns_catz_entry_t.

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* \li 'buffer' is not NULL and '*buffer' is not NULL.

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*/

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isc_result_t

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dns_catz_generate_zonecfg(dns_catz_zone_t *zone, dns_catz_entry_t *entry,

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isc_buffer_t **buf);

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/*%<

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* Generate a zone config entry (in text form) from dns_catz_entry and puts

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* it into *buf. buf might be reallocated.

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*

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* Requires:

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* \li 'zone' is a valid dns_catz_zone_t.

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* \li 'entry' is a valid dns_catz_entry_t.

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* \li 'buf' is not NULL and '*buf' is NULL.

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*

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*/

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/* Methods provided by named to dynamically modify the member zones */

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/* xxxwpk TODO config! */

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typedef isc_result_t (*dns_catz_zoneop_fn_t)(dns_catz_entry_t *entry,

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dns_catz_zone_t *origin,

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dns_view_t *view,

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isc_taskmgr_t *taskmgr,

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void *udata);

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struct dns_catz_zonemodmethods {

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dns_catz_zoneop_fn_t addzone;

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dns_catz_zoneop_fn_t modzone;

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dns_catz_zoneop_fn_t delzone;

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void *udata;

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};

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isc_result_t

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dns_catz_new_zones(dns_catz_zones_t **catzsp, dns_catz_zonemodmethods_t *zmm,

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isc_mem_t *mctx, isc_taskmgr_t *taskmgr,

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isc_timermgr_t *timermgr);

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/*%<

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* Allocate a new catz_zones object, a collection storing all catalog zones

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* for a view.

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*

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* Requires:

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* \li 'catzsp' is not NULL and '*catzsp' is NULL.

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* \li 'zmm' is not NULL.

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*

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*/

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isc_result_t

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dns_catz_add_zone(dns_catz_zones_t *catzs, const dns_name_t *name,

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dns_catz_zone_t **catzp);

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/*%<

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* Allocate a new catz named 'name' and put it in 'catzs' collection.

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'name' is a valid dns_name_t.

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* \li 'zonep' is not NULL and *zonep is NULL.

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*

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*/

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dns_catz_zone_t *

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dns_catz_get_zone(dns_catz_zones_t *catzs, const dns_name_t *name);

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/*%<

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* Returns a zone named 'name' from collection 'catzs'

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'name' is a valid dns_name_t.

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*/

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void

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dns_catz_catzs_attach(dns_catz_zones_t *catzs, dns_catz_zones_t **catzsp);

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/*%<

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* Attach 'catzs' to 'catzsp'.

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'catzsp' is not NULL and *catzsp is NULL.

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*/

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void

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dns_catz_catzs_detach(dns_catz_zones_t **catzsp);

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/*%<

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* Detach 'catzsp', free if no further references.

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*

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* Requires:

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* \li 'catzsp' is not NULL and *catzsp is not NULL.

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*/

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void

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dns_catz_catzs_set_view(dns_catz_zones_t *catzs, dns_view_t *view);

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/*%<

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* Set a view for 'catzs'.

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'catzs->view' is NULL or 'catzs->view' == 'view'.

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*/

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isc_result_t

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dns_catz_dbupdate_callback(dns_db_t *db, void *fn_arg);

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/*%<

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* Callback for update of catalog zone database.

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* If there was no catalog zone update recently it launches an

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* update_taskaction immediately.

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* If there was an update recently it schedules update_taskaction for some time

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* in the future.

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* If there is an update scheduled it replaces old db version with a new one.

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*

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* Requires:

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* \li 'db' is a valid database.

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* \li 'fn_arg' is not NULL (casted to dns_catz_zones_t*).

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*/

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void

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dns_catz_update_taskaction(isc_task_t *task, isc_event_t *event);

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/*%<

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* Task that launches dns_catz_update_from_db.

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*

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* Requires:

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* \li 'event' is not NULL.

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*/

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void

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dns_catz_update_from_db(dns_db_t *db, dns_catz_zones_t *catzs);

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/*%<

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* Process an updated database for a catalog zone.

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* It creates a new catz, iterates over database to fill it with content, and

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* then merges new catz into old catz.

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*

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* Requires:

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* \li 'db' is a valid DB.

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* \li 'catzs' is a valid dns_catz_zones_t.

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*

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*/

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void

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dns_catz_prereconfig(dns_catz_zones_t *catzs);

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/*%<

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* Called before reconfig, clears 'active' flag on all the zones in set

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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*

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*/

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void

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dns_catz_postreconfig(dns_catz_zones_t *catzs);

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/*%<

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* Called after reconfig, walks through all zones in set, removes those

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* inactive and force reload of those with changed configuration.

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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*/

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isc_result_t

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dns_catz_get_iterator(dns_catz_zone_t *catz, isc_ht_iter_t **itp);

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/*%<

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* Get the hashtable iterator on catalog zone members, point '*itp' to it.

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*

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* Requires:

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* \li 'catzs' is a valid dns_catz_zones_t.

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* \li 'itp' is not NULL and '*itp' is NULL.

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*

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* Returns:

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* \li #ISC_R_SUCCESS -- success

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* \li Any other value -- failure

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*/

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ISC_LANG_ENDDECLS

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#endif /* DNS_CATZ_H_ */

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