a00f9e2f50
4224. [func] Added support for "dyndb", a new interface for loading zone data from an external database, developed by Red Hat for the FreeIPA project. DynDB drivers fully implement the BIND database API, and are capable of significantly better performance and functionality than DLZ drivers, while taking advantage of advanced database features not available in BIND such as multi-master replication. Thanks to Adam Tkac and Petr Spacek of Red Hat. [RT #35271]
167 lines
3.6 KiB
C
167 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2004, 2005, 2007, 2009, 2013, 2014 Internet Systems Consortium, Inc. ("ISC")
|
|
* Copyright (C) 1999-2001 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: lib.c,v 1.19 2009/09/03 00:12:23 each Exp $ */
|
|
|
|
/*! \file */
|
|
|
|
#include <config.h>
|
|
|
|
#include <stddef.h>
|
|
|
|
#include <isc/hash.h>
|
|
#include <isc/mem.h>
|
|
#include <isc/msgcat.h>
|
|
#include <isc/mutex.h>
|
|
#include <isc/once.h>
|
|
#include <isc/util.h>
|
|
|
|
#include <dns/db.h>
|
|
#include <dns/ecdb.h>
|
|
#include <dns/lib.h>
|
|
#include <dns/result.h>
|
|
|
|
#include <dst/dst.h>
|
|
|
|
|
|
/***
|
|
*** Globals
|
|
***/
|
|
|
|
LIBDNS_EXTERNAL_DATA unsigned int dns_pps = 0U;
|
|
LIBDNS_EXTERNAL_DATA isc_msgcat_t * dns_msgcat = NULL;
|
|
|
|
|
|
/***
|
|
*** Private
|
|
***/
|
|
|
|
static isc_once_t msgcat_once = ISC_ONCE_INIT;
|
|
|
|
|
|
/***
|
|
*** Functions
|
|
***/
|
|
|
|
static void
|
|
open_msgcat(void) {
|
|
isc_msgcat_open("libdns.cat", &dns_msgcat);
|
|
}
|
|
|
|
void
|
|
dns_lib_initmsgcat(void) {
|
|
|
|
/*
|
|
* Initialize the DNS library's message catalog, dns_msgcat, if it
|
|
* has not already been initialized.
|
|
*/
|
|
|
|
RUNTIME_CHECK(isc_once_do(&msgcat_once, open_msgcat) == ISC_R_SUCCESS);
|
|
}
|
|
|
|
static isc_once_t init_once = ISC_ONCE_INIT;
|
|
static isc_mem_t *dns_g_mctx = NULL;
|
|
static dns_dbimplementation_t *dbimp = NULL;
|
|
static isc_boolean_t initialize_done = ISC_FALSE;
|
|
static isc_mutex_t reflock;
|
|
static unsigned int references = 0;
|
|
|
|
static void
|
|
initialize(void) {
|
|
isc_result_t result;
|
|
|
|
REQUIRE(initialize_done == ISC_FALSE);
|
|
|
|
result = isc_mem_create(0, 0, &dns_g_mctx);
|
|
if (result != ISC_R_SUCCESS)
|
|
return;
|
|
dns_result_register();
|
|
result = dns_ecdb_register(dns_g_mctx, &dbimp);
|
|
if (result != ISC_R_SUCCESS)
|
|
goto cleanup_mctx;
|
|
result = isc_hash_create(dns_g_mctx, NULL, DNS_NAME_MAXWIRE);
|
|
if (result != ISC_R_SUCCESS)
|
|
goto cleanup_db;
|
|
|
|
result = dst_lib_init(dns_g_mctx, NULL, 0);
|
|
if (result != ISC_R_SUCCESS)
|
|
goto cleanup_hash;
|
|
|
|
result = isc_mutex_init(&reflock);
|
|
if (result != ISC_R_SUCCESS)
|
|
goto cleanup_dst;
|
|
|
|
initialize_done = ISC_TRUE;
|
|
return;
|
|
|
|
cleanup_dst:
|
|
dst_lib_destroy();
|
|
cleanup_hash:
|
|
isc_hash_destroy();
|
|
cleanup_db:
|
|
if (dbimp != NULL)
|
|
dns_ecdb_unregister(&dbimp);
|
|
cleanup_mctx:
|
|
if (dns_g_mctx != NULL)
|
|
isc_mem_detach(&dns_g_mctx);
|
|
}
|
|
|
|
isc_result_t
|
|
dns_lib_init(void) {
|
|
isc_result_t result;
|
|
|
|
/*
|
|
* Since this routine is expected to be used by a normal application,
|
|
* it should be better to return an error, instead of an emergency
|
|
* abort, on any failure.
|
|
*/
|
|
result = isc_once_do(&init_once, initialize);
|
|
if (result != ISC_R_SUCCESS)
|
|
return (result);
|
|
|
|
if (!initialize_done)
|
|
return (ISC_R_FAILURE);
|
|
|
|
LOCK(&reflock);
|
|
references++;
|
|
UNLOCK(&reflock);
|
|
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
|
|
void
|
|
dns_lib_shutdown(void) {
|
|
isc_boolean_t cleanup_ok = ISC_FALSE;
|
|
|
|
LOCK(&reflock);
|
|
if (--references == 0)
|
|
cleanup_ok = ISC_TRUE;
|
|
UNLOCK(&reflock);
|
|
|
|
if (!cleanup_ok)
|
|
return;
|
|
|
|
dst_lib_destroy();
|
|
|
|
if (isc_hashctx != NULL)
|
|
isc_hash_destroy();
|
|
if (dbimp != NULL)
|
|
dns_ecdb_unregister(&dbimp);
|
|
if (dns_g_mctx != NULL)
|
|
isc_mem_detach(&dns_g_mctx);
|
|
}
|