/*
* Database API implementation. The interface is defined in lib/dns/db.h.
*
* dns_db_*() calls on database instances backed by this driver use
* struct sampledb_methods to find appropriate function implementation.
*
* This example re-uses RBT DB implementation from original BIND and blindly
* proxies most of dns_db_*() calls to this underlying RBT DB.
* See struct sampledb below.
*
* Copyright (C) 2009-2015 Red Hat ; see COPYRIGHT for license
*/
#include <config.h>
#include <inttypes.h>
#include <stdbool.h>
#include <isc/string.h>
#include <isc/util.h>
#include <dns/db.h>
#include <dns/diff.h>
#include <dns/enumclass.h>
#include <dns/rbt.h>
#include <dns/rdatalist.h>
#include <dns/rdatastruct.h>
#include <dns/soa.h>
#include <dns/types.h>
#include "db.h"
#include "instance.h"
#include "syncptr.h"
#include "util.h"
#define SAMPLEDB_MAGIC ISC_MAGIC('S', 'M', 'D', 'B')
#define VALID_SAMPLEDB(sampledb) \
((sampledb) != NULL && (sampledb)->common.impmagic == SAMPLEDB_MAGIC)
struct sampledb {
dns_db_t common;
isc_refcount_t refs;
sample_instance_t *inst;
/*
* Internal RBT database implementation provided by BIND.
* Most dns_db_* calls (find(), createiterator(), etc.)
* are blindly forwarded to this RBT DB.
*/
dns_db_t *rbtdb;
};
typedef struct sampledb sampledb_t;
/*
* Get full DNS name from the node.
*
* @warning
* The code silently expects that "node" came from RBTDB and thus
* assumption dns_dbnode_t (from RBTDB) == dns_rbtnode_t is correct.
*
* This should work as long as we use only RBTDB and nothing else.
*/
static isc_result_t
sample_name_fromnode(dns_dbnode_t *node, dns_name_t *name) {
dns_rbtnode_t *rbtnode = (dns_rbtnode_t *) node;
return (dns_rbt_fullnamefromnode(rbtnode, name));
}
static void
attach(dns_db_t *source, dns_db_t **targetp) {
sampledb_t *sampledb = (sampledb_t *)source;
REQUIRE(VALID_SAMPLEDB(sampledb));
isc_refcount_increment(&sampledb->refs, NULL);
*targetp = source;
}
static void
free_sampledb(sampledb_t *sampledb) {
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_detach(&sampledb->rbtdb);
dns_name_free(&sampledb->common.origin, sampledb->common.mctx);
isc_mem_putanddetach(&sampledb->common.mctx, sampledb, sizeof(*sampledb));
}
static void
detach(dns_db_t **dbp) {
sampledb_t *sampledb = (sampledb_t *)(*dbp);
unsigned int refs;
REQUIRE(VALID_SAMPLEDB(sampledb));
isc_refcount_decrement(&sampledb->refs, &refs);
if (refs == 0)
free_sampledb(sampledb);
*dbp = NULL;
}
/*
* This method should never be called, because DB is "persistent".
* See ispersistent() function. It means that database do not need to be
* loaded in the usual sense.
*/
static isc_result_t
beginload(dns_db_t *db, dns_rdatacallbacks_t *callbacks) {
UNUSED(db);
UNUSED(callbacks);
fatal_error("current implementation should never call beginload()");
/* Not reached */
return (ISC_R_SUCCESS);
}
/*
* This method should never be called, because DB is "persistent".
* See ispersistent() function. It means that database do not need to be
* loaded in the usual sense.
*/
static isc_result_t
endload(dns_db_t *db, dns_rdatacallbacks_t *callbacks) {
UNUSED(db);
UNUSED(callbacks);
fatal_error("current implementation should never call endload()");
/* Not reached */
return (ISC_R_SUCCESS);
}
static isc_result_t
serialize(dns_db_t *db, dns_dbversion_t *version, FILE *file) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_serialize(sampledb->rbtdb, version, file));
}
static isc_result_t
dump(dns_db_t *db, dns_dbversion_t *version, const char *filename,
dns_masterformat_t masterformat)
{
UNUSED(db);
UNUSED(version);
UNUSED(filename);
UNUSED(masterformat);
fatal_error("current implementation should never call dump()");
/* Not reached */
return (ISC_R_SUCCESS);
}
static void
currentversion(dns_db_t *db, dns_dbversion_t **versionp) {
sampledb_t *sampledb = (sampledb_t *)db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_currentversion(sampledb->rbtdb, versionp);
}
static isc_result_t
newversion(dns_db_t *db, dns_dbversion_t **versionp) {
sampledb_t *sampledb = (sampledb_t *)db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_newversion(sampledb->rbtdb, versionp));
}
static void
attachversion(dns_db_t *db, dns_dbversion_t *source,
dns_dbversion_t **targetp)
{
sampledb_t *sampledb = (sampledb_t *)db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_attachversion(sampledb->rbtdb, source, targetp);
}
static void
closeversion(dns_db_t *db, dns_dbversion_t **versionp, bool commit) {
sampledb_t *sampledb = (sampledb_t *)db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_closeversion(sampledb->rbtdb, versionp, commit);
}
static isc_result_t
findnode(dns_db_t *db, dns_name_t *name, bool create,
dns_dbnode_t **nodep)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_findnode(sampledb->rbtdb, name, create, nodep));
}
static 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)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_find(sampledb->rbtdb, name, version, type,
options, now, nodep, foundname,
rdataset, sigrdataset));
}
static 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)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_findzonecut(sampledb->rbtdb, name, options,
now, nodep, foundname, rdataset,
sigrdataset));
}
static void
attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_attachnode(sampledb->rbtdb, source, targetp);
}
static void
detachnode(dns_db_t *db, dns_dbnode_t **targetp) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_detachnode(sampledb->rbtdb, targetp);
}
static isc_result_t
expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_expirenode(sampledb->rbtdb, node, now));
}
static void
printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_printnode(sampledb->rbtdb, node, out);
}
static isc_result_t
createiterator(dns_db_t *db, unsigned int options,
dns_dbiterator_t **iteratorp)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_createiterator(sampledb->rbtdb, options, iteratorp));
}
static 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)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_findrdataset(sampledb->rbtdb, node, version, type,
covers, now, rdataset, sigrdataset));
}
static isc_result_t
allrdatasets(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
isc_stdtime_t now, dns_rdatasetiter_t **iteratorp)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_allrdatasets(sampledb->rbtdb, node, version,
now, iteratorp));
}
static 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)
{
sampledb_t *sampledb = (sampledb_t *) db;
isc_result_t result;
dns_fixedname_t name;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_fixedname_init(&name);
CHECK(dns_db_addrdataset(sampledb->rbtdb, node, version, now,
rdataset, options, addedrdataset));
if (rdataset->type == dns_rdatatype_a ||
rdataset->type == dns_rdatatype_aaaa) {
CHECK(sample_name_fromnode(node, dns_fixedname_name(&name)));
CHECK(syncptrs(sampledb->inst, dns_fixedname_name(&name),
rdataset, DNS_DIFFOP_ADD));
}
cleanup:
return (result);
}
static 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)
{
sampledb_t *sampledb = (sampledb_t *) db;
isc_result_t result;
dns_fixedname_t name;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_fixedname_init(&name);
result = dns_db_subtractrdataset(sampledb->rbtdb, node, version,
rdataset, options, newrdataset);
if (result != ISC_R_SUCCESS && result != DNS_R_NXRRSET)
goto cleanup;
if (rdataset->type == dns_rdatatype_a ||
rdataset->type == dns_rdatatype_aaaa) {
CHECK(sample_name_fromnode(node, dns_fixedname_name(&name)));
CHECK(syncptrs(sampledb->inst, dns_fixedname_name(&name),
rdataset, DNS_DIFFOP_DEL));
}
cleanup:
return (result);
}
/*
* deleterdataset() function is not used during DNS update processing so syncptr
* implementation is left as an exercise to the reader.
*/
static isc_result_t
deleterdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
dns_rdatatype_t type, dns_rdatatype_t covers)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_deleterdataset(sampledb->rbtdb, node, version,
type, covers));
}
static bool
issecure(dns_db_t *db) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_issecure(sampledb->rbtdb));
}
static unsigned int
nodecount(dns_db_t *db) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_nodecount(sampledb->rbtdb));
}
/*
* The database does not need to be loaded from disk or written to disk.
* Always return true.
*/
static bool
ispersistent(dns_db_t *db) {
UNUSED(db);
return (true);
}
static void
overmem(dns_db_t *db, bool over) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_overmem(sampledb->rbtdb, over);
}
static void
settask(dns_db_t *db, isc_task_t *task) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_settask(sampledb->rbtdb, task);
}
static isc_result_t
getoriginnode(dns_db_t *db, dns_dbnode_t **nodep) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_getoriginnode(sampledb->rbtdb, nodep));
}
static void
transfernode(dns_db_t *db, dns_dbnode_t **sourcep, dns_dbnode_t **targetp) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_transfernode(sampledb->rbtdb, sourcep, targetp);
}
static isc_result_t
getnsec3parameters(dns_db_t *db, dns_dbversion_t *version,
dns_hash_t *hash, uint8_t *flags,
uint16_t *iterations,
unsigned char *salt, size_t *salt_length)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_getnsec3parameters(sampledb->rbtdb, version,
hash, flags, iterations,
salt, salt_length));
}
static isc_result_t
findnsec3node(dns_db_t *db, dns_name_t *name, bool create,
dns_dbnode_t **nodep)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_findnsec3node(sampledb->rbtdb, name, create, nodep));
}
static isc_result_t
setsigningtime(dns_db_t *db, dns_rdataset_t *rdataset, isc_stdtime_t resign) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_setsigningtime(sampledb->rbtdb, rdataset, resign));
}
static isc_result_t
getsigningtime(dns_db_t *db, dns_rdataset_t *rdataset, dns_name_t *name) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_getsigningtime(sampledb->rbtdb, rdataset, name));
}
static void
resigned(dns_db_t *db, dns_rdataset_t *rdataset, dns_dbversion_t *version) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_resigned(sampledb->rbtdb, rdataset, version);
}
static bool
isdnssec(dns_db_t *db) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_isdnssec(sampledb->rbtdb));
}
static dns_stats_t *
getrrsetstats(dns_db_t *db) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_getrrsetstats(sampledb->rbtdb));
}
static void
rpz_attach(dns_db_t *db, dns_rpz_zones_t *rpzs, dns_rpz_num_t rpz_num) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
dns_db_rpz_attach(sampledb->rbtdb, rpzs, rpz_num);
}
static isc_result_t
rpz_ready(dns_db_t *db) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_rpz_ready(sampledb->rbtdb));
}
static isc_result_t
findnodeext(dns_db_t *db, dns_name_t *name,
bool create, dns_clientinfomethods_t *methods,
dns_clientinfo_t *clientinfo, dns_dbnode_t **nodep)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_findnodeext(sampledb->rbtdb, name, create,
methods, clientinfo, nodep));
}
static isc_result_t
findext(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_clientinfomethods_t *methods, dns_clientinfo_t *clientinfo,
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_findext(sampledb->rbtdb, name, version, type,
options, now, nodep, foundname, methods,
clientinfo, rdataset, sigrdataset));
}
static isc_result_t
setcachestats(dns_db_t *db, isc_stats_t *stats) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_setcachestats(sampledb->rbtdb, stats));
}
static size_t
hashsize(dns_db_t *db) {
sampledb_t *sampledb = (sampledb_t *) db;
REQUIRE(VALID_SAMPLEDB(sampledb));
return (dns_db_hashsize(sampledb->rbtdb));
}
/*
* DB interface definition. Database driver uses this structure to
* determine which implementation of dns_db_*() function to call.
*/
static dns_dbmethods_t sampledb_methods = {
attach,
detach,
beginload,
endload,
serialize,
dump,
currentversion,
newversion,
attachversion,
closeversion,
findnode,
find,
findzonecut,
attachnode,
detachnode,
expirenode,
printnode,
createiterator,
findrdataset,
allrdatasets,
addrdataset,
subtractrdataset,
deleterdataset,
issecure,
nodecount,
ispersistent,
overmem,
settask,
getoriginnode,
transfernode,
getnsec3parameters,
findnsec3node,
setsigningtime,
getsigningtime,
resigned,
isdnssec,
getrrsetstats,
rpz_attach,
rpz_ready,
findnodeext,
findext,
setcachestats,
hashsize,
NULL,
NULL,
};
/* Auxiliary driver functions. */
/*
* Auxiliary functions add_*() create minimal database which can be loaded.
* This is necessary because this driver create empty 'fake' zone which
* is not loaded from disk so there is no way for user to supply SOA, NS and A
* records.
*
* Following functions were copied from BIND 9.10.2rc1 named/server.c,
* credit goes to ISC.
*/
static isc_result_t
add_soa(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_name_t *origin, dns_name_t *contact)
{
dns_dbnode_t *node = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdatalist_t rdatalist;
dns_rdataset_t rdataset;
isc_result_t result;
unsigned char buf[DNS_SOA_BUFFERSIZE];
dns_rdataset_init(&rdataset);
dns_rdatalist_init(&rdatalist);
CHECK(dns_soa_buildrdata(origin, contact, dns_db_class(db),
0, 28800, 7200, 604800, 86400, buf, &rdata));
rdatalist.type = rdata.type;
rdatalist.covers = 0;
rdatalist.rdclass = rdata.rdclass;
rdatalist.ttl = 86400;
ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
CHECK(dns_rdatalist_tordataset(&rdatalist, &rdataset));
CHECK(dns_db_findnode(db, name, true, &node));
CHECK(dns_db_addrdataset(db, node, version, 0, &rdataset, 0, NULL));
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
add_ns(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_name_t *nsname)
{
dns_dbnode_t *node = NULL;
dns_rdata_ns_t ns;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdatalist_t rdatalist;
dns_rdataset_t rdataset;
isc_result_t result;
isc_buffer_t b;
unsigned char buf[DNS_NAME_MAXWIRE];
isc_buffer_init(&b, buf, sizeof(buf));
dns_rdataset_init(&rdataset);
dns_rdatalist_init(&rdatalist);
ns.common.rdtype = dns_rdatatype_ns;
ns.common.rdclass = dns_db_class(db);
ns.mctx = NULL;
dns_name_init(&ns.name, NULL);
dns_name_clone(nsname, &ns.name);
CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db), dns_rdatatype_ns,
&ns, &b));
rdatalist.type = rdata.type;
rdatalist.covers = 0;
rdatalist.rdclass = rdata.rdclass;
rdatalist.ttl = 86400;
ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
CHECK(dns_rdatalist_tordataset(&rdatalist, &rdataset));
CHECK(dns_db_findnode(db, name, true, &node));
CHECK(dns_db_addrdataset(db, node, version, 0, &rdataset, 0, NULL));
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
add_a(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
struct in_addr addr)
{
dns_dbnode_t *node = NULL;
dns_rdata_in_a_t a;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdatalist_t rdatalist;
dns_rdataset_t rdataset;
isc_result_t result;
isc_buffer_t b;
unsigned char buf[DNS_NAME_MAXWIRE];
isc_buffer_init(&b, buf, sizeof(buf));
dns_rdataset_init(&rdataset);
dns_rdatalist_init(&rdatalist);
a.common.rdtype = dns_rdatatype_a;
a.common.rdclass = dns_db_class(db);
a.in_addr = addr;
CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db), dns_rdatatype_a,
&a, &b));
rdatalist.type = rdata.type;
rdatalist.covers = 0;
rdatalist.rdclass = rdata.rdclass;
rdatalist.ttl = 86400;
ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
CHECK(dns_rdatalist_tordataset(&rdatalist, &rdataset));
CHECK(dns_db_findnode(db, name, true, &node));
CHECK(dns_db_addrdataset(db, node, version, 0, &rdataset, 0, NULL));
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
/*
* Driver-specific implementation of dns_db_create().
*
* @param[in] argv Database-specific parameters from dns_db_create().
* @param[in] driverarg Driver-specific parameter from dns_db_register().
*/
isc_result_t
create_db(isc_mem_t *mctx, dns_name_t *origin, dns_dbtype_t type,
dns_rdataclass_t rdclass, unsigned int argc, char *argv[],
void *driverarg, dns_db_t **dbp)
{
sampledb_t *sampledb = NULL;
isc_result_t result;
dns_dbversion_t *version = NULL;
struct in_addr a_addr;
REQUIRE(type == dns_dbtype_zone);
REQUIRE(rdclass == dns_rdataclass_in);
REQUIRE(argc == 0);
REQUIRE(argv != NULL);
REQUIRE(driverarg != NULL); /* pointer to driver instance */
REQUIRE(dbp != NULL && *dbp == NULL);
UNUSED(driverarg); /* no driver-specific configuration */
a_addr.s_addr = 0x0100007fU;
CHECKED_MEM_GET_PTR(mctx, sampledb);
ZERO_PTR(sampledb);
isc_mem_attach(mctx, &sampledb->common.mctx);
dns_name_init(&sampledb->common.origin, NULL);
isc_ondestroy_init(&sampledb->common.ondest);
sampledb->common.magic = DNS_DB_MAGIC;
sampledb->common.impmagic = SAMPLEDB_MAGIC;
sampledb->common.methods = &sampledb_methods;
sampledb->common.attributes = 0;
sampledb->common.rdclass = rdclass;
CHECK(dns_name_dupwithoffsets(origin, mctx, &sampledb->common.origin));
CHECK(isc_refcount_init(&sampledb->refs, 1));
/* Translate instance name to instance pointer. */
sampledb->inst = driverarg;
/* Create internal instance of RBT DB implementation from BIND. */
CHECK(dns_db_create(mctx, "rbt", origin, dns_dbtype_zone,
dns_rdataclass_in, 0, NULL, &sampledb->rbtdb));
/* Create fake SOA, NS, and A records to make database loadable. */
CHECK(dns_db_newversion(sampledb->rbtdb, &version));
CHECK(add_soa(sampledb->rbtdb, version, origin, origin, origin));
CHECK(add_ns(sampledb->rbtdb, version, origin, origin));
CHECK(add_a(sampledb->rbtdb, version, origin, a_addr));
dns_db_closeversion(sampledb->rbtdb, &version, true);
*dbp = (dns_db_t *)sampledb;
return (ISC_R_SUCCESS);
cleanup:
if (sampledb != NULL) {
if (dns_name_dynamic(&sampledb->common.origin))
dns_name_free(&sampledb->common.origin, mctx);
isc_mem_putanddetach(&sampledb->common.mctx, sampledb,
sizeof(*sampledb));
}
return (result);
}