mirror of
https://github.com/isc-projects/bind9.git
synced 2026-02-26 03:11:56 -05:00
1322 lines
34 KiB
C
1322 lines
34 KiB
C
/*
|
|
* Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
|
|
* Copyright (C) 1999-2003 Internet Software Consortium.
|
|
*
|
|
* Permission to use, copy, modify, and/or 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.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
|
|
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS. IN NO EVENT SHALL ISC 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.
|
|
*/
|
|
|
|
/* $Id: db.h,v 1.89 2007/06/18 23:47:42 tbox Exp $ */
|
|
|
|
#ifndef DNS_DB_H
|
|
#define DNS_DB_H 1
|
|
|
|
/*****
|
|
***** Module Info
|
|
*****/
|
|
|
|
/*! \file dns/db.h
|
|
* \brief
|
|
* The DNS DB interface allows named rdatasets to be stored and retrieved.
|
|
*
|
|
* The dns_db_t type is like a "virtual class". To actually use
|
|
* DBs, an implementation of the class is required.
|
|
*
|
|
* XXX more XXX
|
|
*
|
|
* MP:
|
|
* \li The module ensures appropriate synchronization of data structures it
|
|
* creates and manipulates.
|
|
*
|
|
* Reliability:
|
|
* \li No anticipated impact.
|
|
*
|
|
* Resources:
|
|
* \li TBS
|
|
*
|
|
* Security:
|
|
* \li No anticipated impact.
|
|
*
|
|
* Standards:
|
|
* \li None.
|
|
*/
|
|
|
|
/*****
|
|
***** Imports
|
|
*****/
|
|
|
|
#include <isc/lang.h>
|
|
#include <isc/magic.h>
|
|
#include <isc/ondestroy.h>
|
|
#include <isc/stdtime.h>
|
|
|
|
#include <dns/name.h>
|
|
#include <dns/types.h>
|
|
|
|
ISC_LANG_BEGINDECLS
|
|
|
|
/*****
|
|
***** Types
|
|
*****/
|
|
|
|
typedef struct dns_dbmethods {
|
|
void (*attach)(dns_db_t *source, dns_db_t **targetp);
|
|
void (*detach)(dns_db_t **dbp);
|
|
isc_result_t (*beginload)(dns_db_t *db, dns_addrdatasetfunc_t *addp,
|
|
dns_dbload_t **dbloadp);
|
|
isc_result_t (*endload)(dns_db_t *db, dns_dbload_t **dbloadp);
|
|
isc_result_t (*dump)(dns_db_t *db, dns_dbversion_t *version,
|
|
const char *filename,
|
|
dns_masterformat_t masterformat);
|
|
void (*currentversion)(dns_db_t *db,
|
|
dns_dbversion_t **versionp);
|
|
isc_result_t (*newversion)(dns_db_t *db,
|
|
dns_dbversion_t **versionp);
|
|
void (*attachversion)(dns_db_t *db, dns_dbversion_t *source,
|
|
dns_dbversion_t **targetp);
|
|
void (*closeversion)(dns_db_t *db,
|
|
dns_dbversion_t **versionp,
|
|
isc_boolean_t commit);
|
|
isc_result_t (*findnode)(dns_db_t *db, dns_name_t *name,
|
|
isc_boolean_t create,
|
|
dns_dbnode_t **nodep);
|
|
isc_result_t (*find)(dns_db_t *db, dns_name_t *name,
|
|
dns_dbversion_t *version,
|
|
dns_rdatatype_t type, unsigned int options,
|
|
isc_stdtime_t now,
|
|
dns_dbnode_t **nodep, dns_name_t *foundname,
|
|
dns_rdataset_t *rdataset,
|
|
dns_rdataset_t *sigrdataset);
|
|
isc_result_t (*findzonecut)(dns_db_t *db, dns_name_t *name,
|
|
unsigned int options, isc_stdtime_t now,
|
|
dns_dbnode_t **nodep,
|
|
dns_name_t *foundname,
|
|
dns_rdataset_t *rdataset,
|
|
dns_rdataset_t *sigrdataset);
|
|
void (*attachnode)(dns_db_t *db,
|
|
dns_dbnode_t *source,
|
|
dns_dbnode_t **targetp);
|
|
void (*detachnode)(dns_db_t *db,
|
|
dns_dbnode_t **targetp);
|
|
isc_result_t (*expirenode)(dns_db_t *db, dns_dbnode_t *node,
|
|
isc_stdtime_t now);
|
|
void (*printnode)(dns_db_t *db, dns_dbnode_t *node,
|
|
FILE *out);
|
|
isc_result_t (*createiterator)(dns_db_t *db,
|
|
isc_boolean_t relative_names,
|
|
dns_dbiterator_t **iteratorp);
|
|
isc_result_t (*findrdataset)(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version,
|
|
dns_rdatatype_t type,
|
|
dns_rdatatype_t covers,
|
|
isc_stdtime_t now,
|
|
dns_rdataset_t *rdataset,
|
|
dns_rdataset_t *sigrdataset);
|
|
isc_result_t (*allrdatasets)(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version,
|
|
isc_stdtime_t now,
|
|
dns_rdatasetiter_t **iteratorp);
|
|
isc_result_t (*addrdataset)(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version,
|
|
isc_stdtime_t now,
|
|
dns_rdataset_t *rdataset,
|
|
unsigned int options,
|
|
dns_rdataset_t *addedrdataset);
|
|
isc_result_t (*subtractrdataset)(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version,
|
|
dns_rdataset_t *rdataset,
|
|
unsigned int options,
|
|
dns_rdataset_t *newrdataset);
|
|
isc_result_t (*deleterdataset)(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version,
|
|
dns_rdatatype_t type,
|
|
dns_rdatatype_t covers);
|
|
isc_boolean_t (*issecure)(dns_db_t *db);
|
|
unsigned int (*nodecount)(dns_db_t *db);
|
|
isc_boolean_t (*ispersistent)(dns_db_t *db);
|
|
void (*overmem)(dns_db_t *db, isc_boolean_t overmem);
|
|
void (*settask)(dns_db_t *db, isc_task_t *);
|
|
isc_result_t (*getoriginnode)(dns_db_t *db, dns_dbnode_t **nodep);
|
|
void (*transfernode)(dns_db_t *db, dns_dbnode_t **sourcep,
|
|
dns_dbnode_t **targetp);
|
|
} dns_dbmethods_t;
|
|
|
|
typedef isc_result_t
|
|
(*dns_dbcreatefunc_t)(isc_mem_t *mctx, dns_name_t *name,
|
|
dns_dbtype_t type, dns_rdataclass_t rdclass,
|
|
unsigned int argc, char *argv[], void *driverarg,
|
|
dns_db_t **dbp);
|
|
|
|
#define DNS_DB_MAGIC ISC_MAGIC('D','N','S','D')
|
|
#define DNS_DB_VALID(db) ISC_MAGIC_VALID(db, DNS_DB_MAGIC)
|
|
|
|
/*%
|
|
* This structure is actually just the common prefix of a DNS db
|
|
* implementation's version of a dns_db_t.
|
|
* \brief
|
|
* Direct use of this structure by clients is forbidden. DB implementations
|
|
* may change the structure. 'magic' must be DNS_DB_MAGIC for any of the
|
|
* dns_db_ routines to work. DB implementations must maintain all DB
|
|
* invariants.
|
|
*/
|
|
struct dns_db {
|
|
unsigned int magic;
|
|
unsigned int impmagic;
|
|
dns_dbmethods_t * methods;
|
|
isc_uint16_t attributes;
|
|
dns_rdataclass_t rdclass;
|
|
dns_name_t origin;
|
|
isc_ondestroy_t ondest;
|
|
isc_mem_t * mctx;
|
|
};
|
|
|
|
#define DNS_DBATTR_CACHE 0x01
|
|
#define DNS_DBATTR_STUB 0x02
|
|
|
|
/*@{*/
|
|
/*%
|
|
* Options that can be specified for dns_db_find().
|
|
*/
|
|
#define DNS_DBFIND_GLUEOK 0x01
|
|
#define DNS_DBFIND_VALIDATEGLUE 0x02
|
|
#define DNS_DBFIND_NOWILD 0x04
|
|
#define DNS_DBFIND_PENDINGOK 0x08
|
|
#define DNS_DBFIND_NOEXACT 0x10
|
|
#define DNS_DBFIND_FORCENSEC 0x20
|
|
#define DNS_DBFIND_COVERINGNSEC 0x40
|
|
/*@}*/
|
|
|
|
/*@{*/
|
|
/*%
|
|
* Options that can be specified for dns_db_addrdataset().
|
|
*/
|
|
#define DNS_DBADD_MERGE 0x01
|
|
#define DNS_DBADD_FORCE 0x02
|
|
#define DNS_DBADD_EXACT 0x04
|
|
#define DNS_DBADD_EXACTTTL 0x08
|
|
/*@}*/
|
|
|
|
/*%
|
|
* Options that can be specified for dns_db_subtractrdataset().
|
|
*/
|
|
#define DNS_DBSUB_EXACT 0x01
|
|
|
|
/*****
|
|
***** Methods
|
|
*****/
|
|
|
|
/***
|
|
*** Basic DB Methods
|
|
***/
|
|
|
|
isc_result_t
|
|
dns_db_create(isc_mem_t *mctx, const char *db_type, dns_name_t *origin,
|
|
dns_dbtype_t type, dns_rdataclass_t rdclass,
|
|
unsigned int argc, char *argv[], dns_db_t **dbp);
|
|
/*%<
|
|
* Create a new database using implementation 'db_type'.
|
|
*
|
|
* Notes:
|
|
* \li All names in the database must be subdomains of 'origin' and in class
|
|
* 'rdclass'. The database makes its own copy of the origin, so the
|
|
* caller may do whatever they like with 'origin' and its storage once the
|
|
* call returns.
|
|
*
|
|
* \li DB implementation-specific parameters are passed using argc and argv.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li dbp != NULL and *dbp == NULL
|
|
*
|
|
* \li 'origin' is a valid absolute domain name.
|
|
*
|
|
* \li mctx is a valid memory context
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li A copy of 'origin' has been made for the databases use, and the
|
|
* caller is free to do whatever they want with the name and storage
|
|
* associated with 'origin'.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
* \li #ISC_R_NOTFOUND db_type not found
|
|
*
|
|
* \li Many other errors are possible, depending on what db_type was
|
|
* specified.
|
|
*/
|
|
|
|
void
|
|
dns_db_attach(dns_db_t *source, dns_db_t **targetp);
|
|
/*%<
|
|
* Attach *targetp to source.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'source' is a valid database.
|
|
*
|
|
* \li 'targetp' points to a NULL dns_db_t *.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *targetp is attached to source.
|
|
*/
|
|
|
|
void
|
|
dns_db_detach(dns_db_t **dbp);
|
|
/*%<
|
|
* Detach *dbp from its database.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'dbp' points to a valid database.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *dbp is NULL.
|
|
*
|
|
* \li If '*dbp' is the last reference to the database,
|
|
* all resources used by the database will be freed
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_ondestroy(dns_db_t *db, isc_task_t *task, isc_event_t **eventp);
|
|
/*%<
|
|
* Causes 'eventp' to be sent to be sent to 'task' when the database is
|
|
* destroyed.
|
|
*
|
|
* Note; ownership of the eventp is taken from the caller (and *eventp is
|
|
* set to NULL). The sender field of the event is set to 'db' before it is
|
|
* sent to the task.
|
|
*/
|
|
|
|
isc_boolean_t
|
|
dns_db_iscache(dns_db_t *db);
|
|
/*%<
|
|
* Does 'db' have cache semantics?
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
* \li #ISC_TRUE 'db' has cache semantics
|
|
* \li #ISC_FALSE otherwise
|
|
*/
|
|
|
|
isc_boolean_t
|
|
dns_db_iszone(dns_db_t *db);
|
|
/*%<
|
|
* Does 'db' have zone semantics?
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
* \li #ISC_TRUE 'db' has zone semantics
|
|
* \li #ISC_FALSE otherwise
|
|
*/
|
|
|
|
isc_boolean_t
|
|
dns_db_isstub(dns_db_t *db);
|
|
/*%<
|
|
* Does 'db' have stub semantics?
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
* \li #ISC_TRUE 'db' has zone semantics
|
|
* \li #ISC_FALSE otherwise
|
|
*/
|
|
|
|
isc_boolean_t
|
|
dns_db_issecure(dns_db_t *db);
|
|
/*%<
|
|
* Is 'db' secure?
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database with zone semantics.
|
|
*
|
|
* Returns:
|
|
* \li #ISC_TRUE 'db' is secure.
|
|
* \li #ISC_FALSE 'db' is not secure.
|
|
*/
|
|
|
|
dns_name_t *
|
|
dns_db_origin(dns_db_t *db);
|
|
/*%<
|
|
* The origin of the database.
|
|
*
|
|
* Note: caller must not try to change this name.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li The origin of the database.
|
|
*/
|
|
|
|
dns_rdataclass_t
|
|
dns_db_class(dns_db_t *db);
|
|
/*%<
|
|
* The class of the database.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li The class of the database.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_beginload(dns_db_t *db, dns_addrdatasetfunc_t *addp,
|
|
dns_dbload_t **dbloadp);
|
|
/*%<
|
|
* Begin loading 'db'.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li This is the first attempt to load 'db'.
|
|
*
|
|
* \li addp != NULL && *addp == NULL
|
|
*
|
|
* \li dbloadp != NULL && *dbloadp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, *addp will be a valid dns_addrdatasetfunc_t suitable
|
|
* for loading 'db'. *dbloadp will be a valid DB load context which
|
|
* should be used as 'arg' when *addp is called.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used, syntax errors in the master file, etc.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_endload(dns_db_t *db, dns_dbload_t **dbloadp);
|
|
/*%<
|
|
* Finish loading 'db'.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database that is being loaded.
|
|
*
|
|
* \li dbloadp != NULL and *dbloadp is a valid database load context.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *dbloadp == NULL
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used, syntax errors in the master file, etc.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_load(dns_db_t *db, const char *filename);
|
|
|
|
isc_result_t
|
|
dns_db_load2(dns_db_t *db, const char *filename, dns_masterformat_t format);
|
|
/*%<
|
|
* Load master file 'filename' into 'db'.
|
|
*
|
|
* Notes:
|
|
* \li This routine is equivalent to calling
|
|
*
|
|
*\code
|
|
* dns_db_beginload();
|
|
* dns_master_loadfile();
|
|
* dns_db_endload();
|
|
*\endcode
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li This is the first attempt to load 'db'.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used, syntax errors in the master file, etc.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_dump(dns_db_t *db, dns_dbversion_t *version, const char *filename);
|
|
|
|
isc_result_t
|
|
dns_db_dump2(dns_db_t *db, dns_dbversion_t *version, const char *filename,
|
|
dns_masterformat_t masterformat);
|
|
/*%<
|
|
* Dump version 'version' of 'db' to master file 'filename'.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'version' is a valid version.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used, OS file errors, etc.
|
|
*/
|
|
|
|
/***
|
|
*** Version Methods
|
|
***/
|
|
|
|
void
|
|
dns_db_currentversion(dns_db_t *db, dns_dbversion_t **versionp);
|
|
/*%<
|
|
* Open the current version for reading.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database with zone semantics.
|
|
*
|
|
* \li versionp != NULL && *verisonp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, '*versionp' is attached to the current version.
|
|
*
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_newversion(dns_db_t *db, dns_dbversion_t **versionp);
|
|
/*%<
|
|
* Open a new version for reading and writing.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database with zone semantics.
|
|
*
|
|
* \li versionp != NULL && *verisonp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, '*versionp' is attached to the current version.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
void
|
|
dns_db_attachversion(dns_db_t *db, dns_dbversion_t *source,
|
|
dns_dbversion_t **targetp);
|
|
/*%<
|
|
* Attach '*targetp' to 'source'.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database with zone semantics.
|
|
*
|
|
* \li source is a valid open version
|
|
*
|
|
* \li targetp != NULL && *targetp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li '*targetp' is attached to source.
|
|
*/
|
|
|
|
void
|
|
dns_db_closeversion(dns_db_t *db, dns_dbversion_t **versionp,
|
|
isc_boolean_t commit);
|
|
/*%<
|
|
* Close version '*versionp'.
|
|
*
|
|
* Note: if '*versionp' is a read-write version and 'commit' is ISC_TRUE,
|
|
* then all changes made in the version will take effect, otherwise they
|
|
* will be rolled back. The value if 'commit' is ignored for read-only
|
|
* versions.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database with zone semantics.
|
|
*
|
|
* \li '*versionp' refers to a valid version.
|
|
*
|
|
* \li If committing a writable version, then there must be no other
|
|
* outstanding references to the version (e.g. an active rdataset
|
|
* iterator).
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *versionp == NULL
|
|
*
|
|
* \li If *versionp is a read-write version, and commit is ISC_TRUE, then
|
|
* the version will become the current version. If !commit, then all
|
|
* changes made in the version will be undone, and the version will
|
|
* not become the current version.
|
|
*/
|
|
|
|
/***
|
|
*** Node Methods
|
|
***/
|
|
|
|
isc_result_t
|
|
dns_db_findnode(dns_db_t *db, dns_name_t *name, isc_boolean_t create,
|
|
dns_dbnode_t **nodep);
|
|
/*%<
|
|
* Find the node with name 'name'.
|
|
*
|
|
* Notes:
|
|
* \li If 'create' is ISC_TRUE and no node with name 'name' exists, then
|
|
* such a node will be created.
|
|
*
|
|
* \li This routine is for finding or creating a node with the specified
|
|
* name. There are no partial matches. It is not suitable for use
|
|
* in building responses to ordinary DNS queries; clients which wish
|
|
* to do that should use dns_db_find() instead.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'name' is a valid, non-empty, absolute name.
|
|
*
|
|
* \li nodep != NULL && *nodep == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, *nodep is attached to the node with name 'name'.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOTFOUND If !create and name not found.
|
|
* \li #ISC_R_NOMEMORY Can only happen if create is ISC_TRUE.
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_find(dns_db_t *db, dns_name_t *name, dns_dbversion_t *version,
|
|
dns_rdatatype_t type, unsigned int options, isc_stdtime_t now,
|
|
dns_dbnode_t **nodep, dns_name_t *foundname,
|
|
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
|
|
/*%<
|
|
* Find the best match for 'name' and 'type' in version 'version' of 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If type == dns_rdataset_any, then rdataset will not be bound.
|
|
*
|
|
* \li If 'options' does not have #DNS_DBFIND_GLUEOK set, then no glue will
|
|
* be returned. For zone databases, glue is as defined in RFC2181.
|
|
* For cache databases, glue is any rdataset with a trust of
|
|
* dns_trust_glue.
|
|
*
|
|
* \li If 'options' does not have #DNS_DBFIND_PENDINGOK set, then no
|
|
* pending data will be returned. This option is only meaningful for
|
|
* cache databases.
|
|
*
|
|
* \li If the #DNS_DBFIND_NOWILD option is set, then wildcard matching will
|
|
* be disabled. This option is only meaningful for zone databases.
|
|
*
|
|
* \li If the #DNS_DBFIND_FORCENSEC option is set, the database is assumed to
|
|
* have NSEC records, and these will be returned when appropriate. This
|
|
* is only necessary when querying a database that was not secure
|
|
* when created.
|
|
*
|
|
* \li If the DNS_DBFIND_COVERINGNSEC option is set, then look for a
|
|
* NSEC record that potentially covers 'name' if a answer cannot
|
|
* be found. Note the returned NSEC needs to be checked to ensure
|
|
* that it is correct. This only affects answers returned from the
|
|
* cache.
|
|
*
|
|
* \li To respond to a query for SIG records, the caller should create a
|
|
* rdataset iterator and extract the signatures from each rdataset.
|
|
*
|
|
* \li Making queries of type ANY with #DNS_DBFIND_GLUEOK is not recommended,
|
|
* because the burden of determining whether a given rdataset is valid
|
|
* glue or not falls upon the caller.
|
|
*
|
|
* \li The 'now' field is ignored if 'db' is a zone database. If 'db' is a
|
|
* cache database, an rdataset will not be found unless it expires after
|
|
* 'now'. Any ANY query will not match unless at least one rdataset at
|
|
* the node expires after 'now'. If 'now' is zero, then the current time
|
|
* will be used.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'type' is not SIG, or a meta-RR type other than 'ANY' (e.g. 'OPT').
|
|
*
|
|
* \li 'nodep' is NULL, or nodep is a valid pointer and *nodep == NULL.
|
|
*
|
|
* \li 'foundname' is a valid name with a dedicated buffer.
|
|
*
|
|
* \li 'rdataset' is NULL, or is a valid unassociated rdataset.
|
|
*
|
|
* Ensures,
|
|
* on a non-error completion:
|
|
*
|
|
* \li If nodep != NULL, then it is bound to the found node.
|
|
*
|
|
* \li If foundname != NULL, then it contains the full name of the
|
|
* found node.
|
|
*
|
|
* \li If rdataset != NULL and type != dns_rdatatype_any, then
|
|
* rdataset is bound to the found rdataset.
|
|
*
|
|
* Non-error results are:
|
|
*
|
|
* \li #ISC_R_SUCCESS The desired node and type were
|
|
* found.
|
|
*
|
|
* \li #DNS_R_WILDCARD The desired node and type were
|
|
* found after performing
|
|
* wildcard matching. This is
|
|
* only returned if the
|
|
* #DNS_DBFIND_INDICATEWILD
|
|
* option is set; otherwise
|
|
* #ISC_R_SUCCESS is returned.
|
|
*
|
|
* \li #DNS_R_GLUE The desired node and type were
|
|
* found, but are glue. This
|
|
* result can only occur if
|
|
* the DNS_DBFIND_GLUEOK option
|
|
* is set. This result can only
|
|
* occur if 'db' is a zone
|
|
* database. If type ==
|
|
* dns_rdatatype_any, then the
|
|
* node returned may contain, or
|
|
* consist entirely of invalid
|
|
* glue (i.e. data occluded by a
|
|
* zone cut). The caller must
|
|
* take care not to return invalid
|
|
* glue to a client.
|
|
*
|
|
* \li #DNS_R_DELEGATION The data requested is beneath
|
|
* a zone cut. node, foundname,
|
|
* and rdataset reference the
|
|
* NS RRset of the zone cut.
|
|
* If 'db' is a cache database,
|
|
* then this is the deepest known
|
|
* delegation.
|
|
*
|
|
* \li #DNS_R_ZONECUT type == dns_rdatatype_any, and
|
|
* the desired node is a zonecut.
|
|
* The caller must take care not
|
|
* to return inappropriate glue
|
|
* to a client. This result can
|
|
* only occur if 'db' is a zone
|
|
* database and DNS_DBFIND_GLUEOK
|
|
* is set.
|
|
*
|
|
* \li #DNS_R_DNAME The data requested is beneath
|
|
* a DNAME. node, foundname,
|
|
* and rdataset reference the
|
|
* DNAME RRset.
|
|
*
|
|
* \li #DNS_R_CNAME The rdataset requested was not
|
|
* found, but there is a CNAME
|
|
* at the desired name. node,
|
|
* foundname, and rdataset
|
|
* reference the CNAME RRset.
|
|
*
|
|
* \li #DNS_R_NXDOMAIN The desired name does not
|
|
* exist.
|
|
*
|
|
* \li #DNS_R_NXRRSET The desired name exists, but
|
|
* the desired type does not.
|
|
*
|
|
* \li #ISC_R_NOTFOUND The desired name does not
|
|
* exist, and no delegation could
|
|
* be found. This result can only
|
|
* occur if 'db' is a cache
|
|
* database. The caller should
|
|
* use its nameserver(s) of last
|
|
* resort (e.g. root hints).
|
|
*
|
|
* \li #DNS_R_NCACHENXDOMAIN The desired name does not
|
|
* exist. 'node' is bound to the
|
|
* cache node with the desired
|
|
* name, and 'rdataset' contains
|
|
* the negative caching proof.
|
|
*
|
|
* \li #DNS_R_NCACHENXRRSET The desired type does not
|
|
* exist. 'node' is bound to the
|
|
* cache node with the desired
|
|
* name, and 'rdataset' contains
|
|
* the negative caching proof.
|
|
*
|
|
* \li #DNS_R_EMPTYNAME The name exists but there is
|
|
* no data at the name.
|
|
*
|
|
* \li #DNS_R_COVERINGNSEC The returned data is a NSEC
|
|
* that potentially covers 'name'.
|
|
*
|
|
* Error results:
|
|
*
|
|
* \li #ISC_R_NOMEMORY
|
|
*
|
|
* \li #DNS_R_BADDB Data that is required to be
|
|
* present in the DB, e.g. an NSEC
|
|
* record in a secure zone, is not
|
|
* present.
|
|
*
|
|
* \li Other results are possible, and should all be treated as
|
|
* errors.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_findzonecut(dns_db_t *db, dns_name_t *name,
|
|
unsigned int options, isc_stdtime_t now,
|
|
dns_dbnode_t **nodep, dns_name_t *foundname,
|
|
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
|
|
/*%<
|
|
* Find the deepest known zonecut which encloses 'name' in 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If the #DNS_DBFIND_NOEXACT option is set, then the zonecut returned
|
|
* (if any) will be the deepest known ancestor of 'name'.
|
|
*
|
|
* \li If 'now' is zero, then the current time will be used.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database with cache semantics.
|
|
*
|
|
* \li 'nodep' is NULL, or nodep is a valid pointer and *nodep == NULL.
|
|
*
|
|
* \li 'foundname' is a valid name with a dedicated buffer.
|
|
*
|
|
* \li 'rdataset' is NULL, or is a valid unassociated rdataset.
|
|
*
|
|
* Ensures, on a non-error completion:
|
|
*
|
|
* \li If nodep != NULL, then it is bound to the found node.
|
|
*
|
|
* \li If foundname != NULL, then it contains the full name of the
|
|
* found node.
|
|
*
|
|
* \li If rdataset != NULL and type != dns_rdatatype_any, then
|
|
* rdataset is bound to the found rdataset.
|
|
*
|
|
* Non-error results are:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
*
|
|
* \li #ISC_R_NOTFOUND
|
|
*
|
|
* \li Other results are possible, and should all be treated as
|
|
* errors.
|
|
*/
|
|
|
|
void
|
|
dns_db_attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp);
|
|
/*%<
|
|
* Attach *targetp to source.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'source' is a valid node.
|
|
*
|
|
* \li 'targetp' points to a NULL dns_dbnode_t *.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *targetp is attached to source.
|
|
*/
|
|
|
|
void
|
|
dns_db_detachnode(dns_db_t *db, dns_dbnode_t **nodep);
|
|
/*%<
|
|
* Detach *nodep from its node.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'nodep' points to a valid node.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *nodep is NULL.
|
|
*/
|
|
|
|
void
|
|
dns_db_transfernode(dns_db_t *db, dns_dbnode_t **sourcep,
|
|
dns_dbnode_t **targetp);
|
|
/*%<
|
|
* Transfer a node between pointer.
|
|
*
|
|
* This is equivalent to calling dns_db_attachnode() then dns_db_detachnode().
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li '*sourcep' is a valid node.
|
|
*
|
|
* \li 'targetp' points to a NULL dns_dbnode_t *.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li '*sourcep' is NULL.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now);
|
|
/*%<
|
|
* Mark as stale all records at 'node' which expire at or before 'now'.
|
|
*
|
|
* Note: if 'now' is zero, then the current time will be used.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid cache database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*/
|
|
|
|
void
|
|
dns_db_printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out);
|
|
/*%<
|
|
* Print a textual representation of the contents of the node to
|
|
* 'out'.
|
|
*
|
|
* Note: this function is intended for debugging, not general use.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*/
|
|
|
|
/***
|
|
*** DB Iterator Creation
|
|
***/
|
|
|
|
isc_result_t
|
|
dns_db_createiterator(dns_db_t *db, isc_boolean_t relative_names,
|
|
dns_dbiterator_t **iteratorp);
|
|
/*%<
|
|
* Create an iterator for version 'version' of 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If 'relative_names' is ISC_TRUE, then node names returned by the
|
|
* iterator will be relative to the iterator's current origin. If
|
|
* #ISC_FALSE, then the node names will be absolute.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li iteratorp != NULL && *iteratorp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, *iteratorp will be a valid database iterator.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOMEMORY
|
|
*/
|
|
|
|
/***
|
|
*** Rdataset Methods
|
|
***/
|
|
|
|
/*
|
|
* XXXRTH Should we check for glue and pending data in dns_db_findrdataset()?
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
|
|
dns_rdatatype_t type, dns_rdatatype_t covers,
|
|
isc_stdtime_t now, dns_rdataset_t *rdataset,
|
|
dns_rdataset_t *sigrdataset);
|
|
/*%<
|
|
* Search for an rdataset of type 'type' at 'node' that are in version
|
|
* 'version' of 'db'. If found, make 'rdataset' refer to it.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If 'version' is NULL, then the current version will be used.
|
|
*
|
|
* \li Care must be used when using this routine to build a DNS response:
|
|
* 'node' should have been found with dns_db_find(), not
|
|
* dns_db_findnode(). No glue checking is done. No checking for
|
|
* pending data is done.
|
|
*
|
|
* \li The 'now' field is ignored if 'db' is a zone database. If 'db' is a
|
|
* cache database, an rdataset will not be found unless it expires after
|
|
* 'now'. If 'now' is zero, then the current time will be used.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*
|
|
* \li 'rdataset' is a valid, disassociated rdataset.
|
|
*
|
|
* \li 'sigrdataset' is a valid, disassociated rdataset, or it is NULL.
|
|
*
|
|
* \li If 'covers' != 0, 'type' must be SIG.
|
|
*
|
|
* \li 'type' is not a meta-RR type such as 'ANY' or 'OPT'.
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, 'rdataset' is associated with the found rdataset.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOTFOUND
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_allrdatasets(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
|
|
isc_stdtime_t now, dns_rdatasetiter_t **iteratorp);
|
|
/*%<
|
|
* Make '*iteratorp' an rdataset iteratator for all rdatasets at 'node' in
|
|
* version 'version' of 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If 'version' is NULL, then the current version will be used.
|
|
*
|
|
* \li The 'now' field is ignored if 'db' is a zone database. If 'db' is a
|
|
* cache database, an rdataset will not be found unless it expires after
|
|
* 'now'. Any ANY query will not match unless at least one rdataset at
|
|
* the node expires after 'now'. If 'now' is zero, then the current time
|
|
* will be used.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*
|
|
* \li iteratorp != NULL && *iteratorp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li On success, '*iteratorp' is a valid rdataset iterator.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOTFOUND
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
|
|
isc_stdtime_t now, dns_rdataset_t *rdataset,
|
|
unsigned int options, dns_rdataset_t *addedrdataset);
|
|
/*%<
|
|
* Add 'rdataset' to 'node' in version 'version' of 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If the database has zone semantics, the #DNS_DBADD_MERGE option is set,
|
|
* and an rdataset of the same type as 'rdataset' already exists at
|
|
* 'node' then the contents of 'rdataset' will be merged with the existing
|
|
* rdataset. If the option is not set, then rdataset will replace any
|
|
* existing rdataset of the same type. If not merging and the
|
|
* #DNS_DBADD_FORCE option is set, then the data will update the database
|
|
* without regard to trust levels. If not forcing the data, then the
|
|
* rdataset will only be added if its trust level is >= the trust level of
|
|
* any existing rdataset. Forcing is only meaningful for cache databases.
|
|
* If #DNS_DBADD_EXACT is set then there must be no rdata in common between
|
|
* the old and new rdata sets. If #DNS_DBADD_EXACTTTL is set then both
|
|
* the old and new rdata sets must have the same ttl.
|
|
*
|
|
* \li The 'now' field is ignored if 'db' is a zone database. If 'db' is
|
|
* a cache database, then the added rdataset will expire no later than
|
|
* now + rdataset->ttl.
|
|
*
|
|
* \li If 'addedrdataset' is not NULL, then it will be attached to the
|
|
* resulting new rdataset in the database, or to the existing data if
|
|
* the existing data was better.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*
|
|
* \li 'rdataset' is a valid, associated rdataset with the same class
|
|
* as 'db'.
|
|
*
|
|
* \li 'addedrdataset' is NULL, or a valid, unassociated rdataset.
|
|
*
|
|
* \li The database has zone semantics and 'version' is a valid
|
|
* read-write version, or the database has cache semantics
|
|
* and version is NULL.
|
|
*
|
|
* \li If the database has cache semantics, the #DNS_DBADD_MERGE option must
|
|
* not be set.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #DNS_R_UNCHANGED The operation did not change anything.
|
|
* \li #ISC_R_NOMEMORY
|
|
* \li #DNS_R_NOTEXACT
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_subtractrdataset(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version, dns_rdataset_t *rdataset,
|
|
unsigned int options, dns_rdataset_t *newrdataset);
|
|
/*%<
|
|
* Remove any rdata in 'rdataset' from 'node' in version 'version' of
|
|
* 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If 'newrdataset' is not NULL, then it will be attached to the
|
|
* resulting new rdataset in the database, unless the rdataset has
|
|
* become nonexistent. If DNS_DBSUB_EXACT is set then all elements
|
|
* of 'rdataset' must exist at 'node'.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*
|
|
* \li 'rdataset' is a valid, associated rdataset with the same class
|
|
* as 'db'.
|
|
*
|
|
* \li 'newrdataset' is NULL, or a valid, unassociated rdataset.
|
|
*
|
|
* \li The database has zone semantics and 'version' is a valid
|
|
* read-write version.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #DNS_R_UNCHANGED The operation did not change anything.
|
|
* \li #DNS_R_NXRRSET All rdata of the same type as those
|
|
* in 'rdataset' have been deleted.
|
|
* \li #DNS_R_NOTEXACT Some part of 'rdataset' did not
|
|
* exist and DNS_DBSUB_EXACT was set.
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_deleterdataset(dns_db_t *db, dns_dbnode_t *node,
|
|
dns_dbversion_t *version, dns_rdatatype_t type,
|
|
dns_rdatatype_t covers);
|
|
/*%<
|
|
* Make it so that no rdataset of type 'type' exists at 'node' in version
|
|
* version 'version' of 'db'.
|
|
*
|
|
* Notes:
|
|
*
|
|
* \li If 'type' is dns_rdatatype_any, then no rdatasets will exist in
|
|
* 'version' (provided that the dns_db_deleterdataset() isn't followed
|
|
* by one or more dns_db_addrdataset() calls).
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* \li 'node' is a valid node.
|
|
*
|
|
* \li The database has zone semantics and 'version' is a valid
|
|
* read-write version, or the database has cache semantics
|
|
* and version is NULL.
|
|
*
|
|
* \li 'type' is not a meta-RR type, except for dns_rdatatype_any, which is
|
|
* allowed.
|
|
*
|
|
* \li If 'covers' != 0, 'type' must be SIG.
|
|
*
|
|
* Returns:
|
|
*
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #DNS_R_UNCHANGED No rdatasets of 'type' existed before
|
|
* the operation was attempted.
|
|
*
|
|
* \li Other results are possible, depending upon the database
|
|
* implementation used.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_getsoaserial(dns_db_t *db, dns_dbversion_t *ver, isc_uint32_t *serialp);
|
|
/*%<
|
|
* Get the current SOA serial number from a zone database.
|
|
*
|
|
* Requires:
|
|
* \li 'db' is a valid database with zone semantics.
|
|
* \li 'ver' is a valid version.
|
|
*/
|
|
|
|
void
|
|
dns_db_overmem(dns_db_t *db, isc_boolean_t overmem);
|
|
/*%<
|
|
* Enable / disable agressive cache cleaning.
|
|
*/
|
|
|
|
unsigned int
|
|
dns_db_nodecount(dns_db_t *db);
|
|
/*%<
|
|
* Count the number of nodes in 'db'.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
* \li The number of nodes in the database
|
|
*/
|
|
|
|
void
|
|
dns_db_settask(dns_db_t *db, isc_task_t *task);
|
|
/*%<
|
|
* If task is set then the final detach maybe performed asynchronously.
|
|
*
|
|
* Requires:
|
|
* \li 'db' is a valid database.
|
|
* \li 'task' to be valid or NULL.
|
|
*/
|
|
|
|
isc_boolean_t
|
|
dns_db_ispersistent(dns_db_t *db);
|
|
/*%<
|
|
* Is 'db' persistent? A persistent database does not need to be loaded
|
|
* from disk or written to disk.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid database.
|
|
*
|
|
* Returns:
|
|
* \li #ISC_TRUE 'db' is persistent.
|
|
* \li #ISC_FALSE 'db' is not persistent.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_register(const char *name, dns_dbcreatefunc_t create, void *driverarg,
|
|
isc_mem_t *mctx, dns_dbimplementation_t **dbimp);
|
|
|
|
/*%<
|
|
* Register a new database implementation and add it to the list of
|
|
* supported implementations.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'name' is not NULL
|
|
* \li 'order' is a valid function pointer
|
|
* \li 'mctx' is a valid memory context
|
|
* \li dbimp != NULL && *dbimp == NULL
|
|
*
|
|
* Returns:
|
|
* \li #ISC_R_SUCCESS The registration succeeded
|
|
* \li #ISC_R_NOMEMORY Out of memory
|
|
* \li #ISC_R_EXISTS A database implementation with the same name exists
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li *dbimp points to an opaque structure which must be passed to
|
|
* dns_db_unregister().
|
|
*/
|
|
|
|
void
|
|
dns_db_unregister(dns_dbimplementation_t **dbimp);
|
|
/*%<
|
|
* Remove a database implementation from the the list of supported
|
|
* implementations. No databases of this type can be active when this
|
|
* is called.
|
|
*
|
|
* Requires:
|
|
* \li dbimp != NULL && *dbimp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* \li Any memory allocated in *dbimp will be freed.
|
|
*/
|
|
|
|
isc_result_t
|
|
dns_db_getoriginnode(dns_db_t *db, dns_dbnode_t **nodep);
|
|
/*%<
|
|
* Get the origin DB node corresponding to the DB's zone. This function
|
|
* should typically succeed unless the underlying DB implementation doesn't
|
|
* support the feature.
|
|
*
|
|
* Requires:
|
|
*
|
|
* \li 'db' is a valid zone database.
|
|
* \li 'nodep' != NULL && '*nodep' == NULL
|
|
*
|
|
* Ensures:
|
|
* \li On success, '*nodep' will point to the DB node of the zone's origin.
|
|
*
|
|
* Returns:
|
|
* \li #ISC_R_SUCCESS
|
|
* \li #ISC_R_NOTFOUND - the DB implementation does not support this feature.
|
|
*/
|
|
|
|
ISC_LANG_ENDDECLS
|
|
|
|
#endif /* DNS_DB_H */
|