db.c revision a7e185ff3f7db73e282bf53b9f84a95ff8f8cb27
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt/*
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Copyright (C) 1999 Internet Software Consortium.
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt *
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Permission to use, copy, modify, and distribute this software for any
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * purpose with or without fee is hereby granted, provided that the above
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * copyright notice and this permission notice appear in all copies.
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt *
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt * SOFTWARE.
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt */
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt/***
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt *** Imports
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt ***/
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt#include <config.h>
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt#include <stddef.h>
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt#include <string.h>
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt
67adc03ef81fb610f8df093b17f55275ee816754Evan Hunt#include <isc/assertions.h>
#include <dns/db.h>
#include <dns/rdataset.h>
/***
*** Private Types
***/
typedef struct {
char * name;
dns_result_t (*create)(isc_mem_t *mctx, dns_name_t *name,
isc_boolean_t cache,
dns_rdataclass_t rdclass,
unsigned int argc, char *argv[],
dns_db_t **dbp);
} impinfo_t;
/***
*** Supported DB Implementations Registry
***/
/*
* Supported database implementations must be registered here.
*
* It might be nice to generate this automatically some day.
*/
#include "rbtdb.h"
#include "rbtdb64.h"
impinfo_t implementations[] = {
{ "rbt", dns_rbtdb_create },
{ "rbt64", dns_rbtdb64_create },
{ NULL, NULL }
};
/***
*** Basic DB Methods
***/
dns_result_t
dns_db_create(isc_mem_t *mctx, char *db_type, dns_name_t *origin,
isc_boolean_t cache, dns_rdataclass_t rdclass,
unsigned int argc, char *argv[], dns_db_t **dbp)
{
impinfo_t *impinfo;
/*
* Create a new database using implementation 'db_type'.
*/
REQUIRE(dbp != NULL && *dbp == NULL);
REQUIRE(dns_name_isabsolute(origin));
for (impinfo = implementations; impinfo->name != NULL; impinfo++)
if (strcasecmp(db_type, impinfo->name) == 0)
return ((impinfo->create)(mctx, origin, cache, rdclass,
argc, argv, dbp));
return (DNS_R_NOTFOUND);
}
void
dns_db_attach(dns_db_t *source, dns_db_t **targetp) {
/*
* Attach *targetp to source.
*/
REQUIRE(DNS_DB_VALID(source));
REQUIRE(targetp != NULL);
(source->methods->attach)(source, targetp);
ENSURE(*targetp == source);
}
void
dns_db_detach(dns_db_t **dbp) {
/*
* Detach *dbp from its database.
*/
REQUIRE(dbp != NULL);
REQUIRE(DNS_DB_VALID(*dbp));
((*dbp)->methods->detach)(dbp);
ENSURE(*dbp == NULL);
}
isc_boolean_t
dns_db_iscache(dns_db_t *db) {
/*
* Does 'db' have cache semantics?
*/
REQUIRE(DNS_DB_VALID(db));
if ((db->attributes & DNS_DBATTR_CACHE) != 0)
return (ISC_TRUE);
return (ISC_FALSE);
}
isc_boolean_t
dns_db_iszone(dns_db_t *db) {
/*
* Does 'db' have zone semantics?
*/
REQUIRE(DNS_DB_VALID(db));
if ((db->attributes & DNS_DBATTR_CACHE) == 0)
return (ISC_TRUE);
return (ISC_FALSE);
}
dns_name_t *
dns_db_origin(dns_db_t *db) {
/*
* The origin of the database.
*/
REQUIRE(DNS_DB_VALID(db));
return (&db->origin);
}
dns_rdataclass_t
dns_db_class(dns_db_t *db) {
/*
* The class of the database.
*/
REQUIRE(DNS_DB_VALID(db));
return (db->rdclass);
}
dns_result_t
dns_db_load(dns_db_t *db, char *filename) {
/*
* Load master file 'filename' into 'db'.
*/
REQUIRE(DNS_DB_VALID(db));
return (db->methods->load(db, filename));
}
dns_result_t
dns_db_dump(dns_db_t *db, dns_dbversion_t *version, char *filename) {
/*
* Dump 'db' into master file 'filename'.
*/
REQUIRE(DNS_DB_VALID(db));
return (db->methods->dump(db, version, filename));
}
/***
*** Version Methods
***/
void
dns_db_currentversion(dns_db_t *db, dns_dbversion_t **versionp) {
/*
* Open the current version for reading.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE((db->attributes & DNS_DBATTR_CACHE) == 0);
REQUIRE(versionp != NULL && *versionp == NULL);
(db->methods->currentversion)(db, versionp);
}
dns_result_t
dns_db_newversion(dns_db_t *db, dns_dbversion_t **versionp) {
/*
* Open a new version for reading and writing.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE((db->attributes & DNS_DBATTR_CACHE) == 0);
REQUIRE(versionp != NULL && *versionp == NULL);
return ((db->methods->newversion)(db, versionp));
}
void
dns_db_attachversion(dns_db_t *db, dns_dbversion_t *source,
dns_dbversion_t **targetp)
{
/*
* Attach '*targetp' to 'source'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE((db->attributes & DNS_DBATTR_CACHE) == 0);
REQUIRE(source != NULL);
REQUIRE(targetp != NULL && *targetp != NULL);
(db->methods->attachversion)(db, source, targetp);
ENSURE(*targetp != NULL);
}
void
dns_db_closeversion(dns_db_t *db, dns_dbversion_t **versionp,
isc_boolean_t commit)
{
/*
* Close version '*versionp'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE((db->attributes & DNS_DBATTR_CACHE) == 0);
REQUIRE(versionp != NULL && *versionp != NULL);
(db->methods->closeversion)(db, versionp, commit);
ENSURE(*versionp == NULL);
}
/***
*** Node Methods
***/
dns_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'.
*
* WARNING: THIS API WILL BE CHANGING IN THE NEAR FUTURE.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(dns_name_issubdomain(name, &db->origin));
REQUIRE(nodep != NULL && *nodep == NULL);
return ((db->methods->findnode)(db, name, create, nodep));
}
dns_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) {
/*
* Find the best match for 'name' and 'type' in version 'version'
* of 'db'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(type != dns_rdatatype_sig);
REQUIRE(nodep == NULL || (nodep != NULL && *nodep == NULL));
REQUIRE(foundname == NULL || dns_name_hasbuffer(foundname));
REQUIRE(rdataset == NULL ||
(DNS_RDATASET_VALID(rdataset) && rdataset->methods == NULL));
return ((db->methods->find)(db, name, version, type, options, now,
nodep, foundname, rdataset));
}
void
dns_db_attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp) {
/*
* Attach *targetp to source.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(source != NULL);
REQUIRE(targetp != NULL && *targetp == NULL);
(db->methods->attachnode)(db, source, targetp);
}
void
dns_db_detachnode(dns_db_t *db, dns_dbnode_t **nodep) {
/*
* Detach *nodep from its node.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(nodep != NULL && *nodep != NULL);
(db->methods->detachnode)(db, nodep);
ENSURE(*nodep == NULL);
}
dns_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'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE((db->attributes & DNS_DBATTR_CACHE) != 0);
REQUIRE(node != NULL);
return ((db->methods->expirenode)(db, node, now));
}
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'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(node != NULL);
(db->methods->printnode)(db, node, out);
}
/***
*** DB Iterator Creation
***/
dns_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'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(iteratorp != NULL && *iteratorp == NULL);
return (db->methods->createiterator(db, relative_names, iteratorp));
}
/***
*** Rdataset Methods
***/
dns_result_t
dns_db_findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
dns_rdatatype_t type, isc_stdtime_t now,
dns_rdataset_t *rdataset)
{
/*
* Search for an rdataset of type 'type' at 'node' that are in version
* 'version' of 'db'. If found, make 'rdataset' refer to it.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(node != NULL);
REQUIRE(DNS_RDATASET_VALID(rdataset));
REQUIRE(rdataset->methods == NULL);
REQUIRE(type != dns_rdatatype_sig && type != dns_rdatatype_any);
return ((db->methods->findrdataset)(db, node, version, type, now,
rdataset));
}
dns_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'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(iteratorp != NULL && *iteratorp == NULL);
return ((db->methods->allrdatasets)(db, node, version, now,
iteratorp));
}
dns_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,
isc_boolean_t merge, dns_rdataset_t *addedrdataset)
{
/*
* Add 'rdataset' to 'node' in version 'version' of 'db'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(node != NULL);
REQUIRE(((db->attributes & DNS_DBATTR_CACHE) == 0 && version != NULL)||
((db->attributes & DNS_DBATTR_CACHE) != 0 &&
version == NULL && !merge));
REQUIRE(DNS_RDATASET_VALID(rdataset));
REQUIRE(rdataset->methods != NULL);
REQUIRE(rdataset->rdclass == db->rdclass);
REQUIRE(addedrdataset == NULL ||
(DNS_RDATASET_VALID(addedrdataset) &&
addedrdataset->methods == NULL));
return ((db->methods->addrdataset)(db, node, version, now, rdataset,
merge, addedrdataset));
}
dns_result_t
dns_db_subtractrdataset(dns_db_t *db, dns_dbnode_t *node,
dns_dbversion_t *version, dns_rdataset_t *rdataset,
dns_rdataset_t *newrdataset)
{
/*
* Remove any rdata in 'rdataset' from 'node' in version 'version' of
* 'db'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(node != NULL);
REQUIRE(((db->attributes & DNS_DBATTR_CACHE) == 0 && version != NULL));
REQUIRE(DNS_RDATASET_VALID(rdataset));
REQUIRE(rdataset->methods != NULL);
REQUIRE(rdataset->rdclass == db->rdclass);
REQUIRE(newrdataset == NULL ||
(DNS_RDATASET_VALID(newrdataset) &&
newrdataset->methods == NULL));
return ((db->methods->subtractrdataset)(db, node, version, rdataset,
newrdataset));
}
dns_result_t
dns_db_deleterdataset(dns_db_t *db, dns_dbnode_t *node,
dns_dbversion_t *version, dns_rdatatype_t type)
{
/*
* Make it so that no rdataset of type 'type' exists at 'node' in
* version version 'version' of 'db'.
*/
REQUIRE(DNS_DB_VALID(db));
REQUIRE(node != NULL);
REQUIRE(((db->attributes & DNS_DBATTR_CACHE) == 0 && version != NULL)||
((db->attributes & DNS_DBATTR_CACHE) != 0 && version == NULL));
return ((db->methods->deleterdataset)(db, node, version, type));
}