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Name	Size	Permission	Date
acl.h	8.74 KB	-rw-r--r--	2025-01-20 13:39
adb.h	21.28 KB	-rw-r--r--	2025-01-20 13:39
badcache.h	3.28 KB	-rw-r--r--	2025-01-20 13:39
bit.h	788 B	-rw-r--r--	2025-01-20 13:39
byaddr.h	3.5 KB	-rw-r--r--	2025-01-20 13:39
cache.h	6.68 KB	-rw-r--r--	2025-01-20 13:39
callbacks.h	2.04 KB	-rw-r--r--	2025-01-20 13:39
catz.h	12.03 KB	-rw-r--r--	2025-01-20 13:39
cert.h	1.42 KB	-rw-r--r--	2025-01-20 13:39
client.h	9.18 KB	-rw-r--r--	2025-01-20 13:39
clientinfo.h	2.58 KB	-rw-r--r--	2025-01-20 13:39
compress.h	6.86 KB	-rw-r--r--	2025-01-20 13:39
db.h	49.1 KB	-rw-r--r--	2025-01-20 13:39
dbiterator.h	7.18 KB	-rw-r--r--	2025-01-20 13:39
diff.h	6.86 KB	-rw-r--r--	2025-01-20 13:39
dispatch.h	10.25 KB	-rw-r--r--	2026-03-27 00:00
dlz.h	10.61 KB	-rw-r--r--	2025-01-20 13:39
dlz_dlopen.h	4.27 KB	-rw-r--r--	2025-01-20 13:39
dns64.h	6.22 KB	-rw-r--r--	2025-01-20 13:39
dnsrps.h	2.49 KB	-rw-r--r--	2025-01-20 13:39
dnssec.h	12.86 KB	-rw-r--r--	2025-01-20 13:39
dnstap.h	9.95 KB	-rw-r--r--	2025-01-20 13:39
ds.h	1.62 KB	-rw-r--r--	2025-01-20 13:39
dsdigest.h	1.65 KB	-rw-r--r--	2025-01-20 13:39
dyndb.h	4.8 KB	-rw-r--r--	2025-01-20 13:39
ecs.h	1.91 KB	-rw-r--r--	2025-01-20 13:39
edns.h	763 B	-rw-r--r--	2025-01-20 13:39
enumclass.h	1.13 KB	-rw-r--r--	2026-03-27 00:00
enumtype.h	8.42 KB	-rw-r--r--	2026-03-27 00:00
events.h	4.33 KB	-rw-r--r--	2025-01-20 13:39
fixedname.h	1.59 KB	-rw-r--r--	2025-01-20 13:39
forward.h	3.13 KB	-rw-r--r--	2025-01-20 13:39
geoip.h	2.27 KB	-rw-r--r--	2025-01-20 13:39
ipkeylist.h	2.13 KB	-rw-r--r--	2025-01-20 13:39
iptable.h	1.46 KB	-rw-r--r--	2025-01-20 13:39
journal.h	9.46 KB	-rw-r--r--	2025-01-20 13:39
kasp.h	12.46 KB	-rw-r--r--	2025-01-20 13:39
keydata.h	1 KB	-rw-r--r--	2025-01-20 13:39
keyflags.h	1.22 KB	-rw-r--r--	2025-01-20 13:39
keymgr.h	3.99 KB	-rw-r--r--	2025-01-20 13:39
keytable.h	7.85 KB	-rw-r--r--	2025-01-20 13:39
keyvalues.h	3.96 KB	-rw-r--r--	2025-01-20 13:39
librpz.h	30.29 KB	-rw-r--r--	2025-01-20 13:39
log.h	3.91 KB	-rw-r--r--	2025-01-20 13:39
lookup.h	2.84 KB	-rw-r--r--	2025-01-20 13:39
master.h	8.52 KB	-rw-r--r--	2025-01-20 13:39
masterdump.h	9.64 KB	-rw-r--r--	2025-01-20 13:39
message.h	41.35 KB	-rw-r--r--	2026-03-27 00:00
name.h	36.35 KB	-rw-r--r--	2025-01-20 13:39
ncache.h	4.83 KB	-rw-r--r--	2025-01-20 13:39
nsec.h	3.43 KB	-rw-r--r--	2025-01-20 13:39
nsec3.h	8.05 KB	-rw-r--r--	2025-01-20 13:39
nta.h	4.6 KB	-rw-r--r--	2025-01-20 13:39
opcode.h	987 B	-rw-r--r--	2025-01-20 13:39
order.h	1.95 KB	-rw-r--r--	2025-01-20 13:39
peer.h	4.8 KB	-rw-r--r--	2025-01-20 13:39
private.h	1.89 KB	-rw-r--r--	2025-01-20 13:39
rbt.h	34.66 KB	-rw-r--r--	2025-01-20 13:39
rcode.h	2.4 KB	-rw-r--r--	2025-01-20 13:39
rdata.h	22.21 KB	-rw-r--r--	2025-01-20 13:39
rdataclass.h	2.17 KB	-rw-r--r--	2025-01-20 13:39
rdatalist.h	2.47 KB	-rw-r--r--	2025-01-20 13:39
rdataset.h	18.67 KB	-rw-r--r--	2025-01-20 13:39
rdatasetiter.h	3.81 KB	-rw-r--r--	2025-01-20 13:39
rdataslab.h	4.11 KB	-rw-r--r--	2025-01-20 13:39
rdatastruct.h	60.33 KB	-rw-r--r--	2026-03-27 00:00
rdatatype.h	2.21 KB	-rw-r--r--	2025-01-20 13:39
request.h	8.67 KB	-rw-r--r--	2026-03-27 00:00
resolver.h	18.7 KB	-rw-r--r--	2025-01-20 13:39
result.h	689 B	-rw-r--r--	2025-01-20 13:39
rootns.h	872 B	-rw-r--r--	2025-01-20 13:39
rpz.h	12.22 KB	-rw-r--r--	2025-01-20 13:39
rriterator.h	4.09 KB	-rw-r--r--	2025-01-20 13:39
rrl.h	6.8 KB	-rw-r--r--	2025-01-20 13:39
sdb.h	7.17 KB	-rw-r--r--	2025-01-20 13:39
sdlz.h	13.75 KB	-rw-r--r--	2025-01-20 13:39
secalg.h	1.65 KB	-rw-r--r--	2025-01-20 13:39
secproto.h	1.5 KB	-rw-r--r--	2025-01-20 13:39
soa.h	2.12 KB	-rw-r--r--	2025-01-20 13:39
ssu.h	7.6 KB	-rw-r--r--	2025-01-20 13:39
stats.h	24.15 KB	-rw-r--r--	2025-01-20 13:39
time.h	1.64 KB	-rw-r--r--	2025-01-20 13:39
tkey.h	7.46 KB	-rw-r--r--	2025-01-20 13:39
transport.h	5.93 KB	-rw-r--r--	2026-03-27 00:00
tsec.h	2.86 KB	-rw-r--r--	2025-01-20 13:39
tsig.h	8.18 KB	-rw-r--r--	2025-01-20 13:39
ttl.h	1.82 KB	-rw-r--r--	2025-01-20 13:39
types.h	14.03 KB	-rw-r--r--	2026-03-27 00:00
update.h	1.94 KB	-rw-r--r--	2025-01-20 13:39
validator.h	6.6 KB	-rw-r--r--	2025-01-20 13:39
view.h	36.94 KB	-rw-r--r--	2025-01-20 13:39
xfrin.h	2.26 KB	-rw-r--r--	2025-01-20 13:39
zone.h	63.88 KB	-rw-r--r--	2025-01-20 13:39
zonekey.h	754 B	-rw-r--r--	2025-01-20 13:39
zoneverify.h	1.4 KB	-rw-r--r--	2025-01-20 13:39
zt.h	5.02 KB	-rw-r--r--	2025-01-20 13:39

Rename

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#pragma once

/*****
***** Module Info
*****/

/*! \file
 * \brief
 * The NTA module provides services for storing and retrieving negative
 * trust anchors, and determine whether a given domain is subject to
 * DNSSEC validation.
 */

#include <inttypes.h>
#include <stdbool.h>

#include <isc/buffer.h>
#include <isc/lang.h>
#include <isc/magic.h>
#include <isc/refcount.h>
#include <isc/rwlock.h>
#include <isc/stdtime.h>
#include <isc/task.h>
#include <isc/timer.h>

#include <dns/rdataset.h>
#include <dns/resolver.h>
#include <dns/types.h>
#include <dns/view.h>

ISC_LANG_BEGINDECLS

struct dns_ntatable {
	/* Unlocked. */
	unsigned int	magic;
	dns_view_t     *view;
	isc_rwlock_t	rwlock;
	isc_taskmgr_t  *taskmgr;
	isc_timermgr_t *timermgr;
	isc_task_t     *task;
	/* Protected by atomics */
	isc_refcount_t references;
	/* Locked by rwlock. */
	dns_rbt_t *table;
	bool	   shuttingdown;
};

#define NTATABLE_MAGIC	   ISC_MAGIC('N', 'T', 'A', 't')
#define VALID_NTATABLE(nt) ISC_MAGIC_VALID(nt, NTATABLE_MAGIC)

isc_result_t
dns_ntatable_create(dns_view_t *view, isc_taskmgr_t *taskmgr,
		    isc_timermgr_t *timermgr, dns_ntatable_t **ntatablep);
/*%<
 * Create an NTA table in view 'view'.
 *
 * Requires:
 *
 *\li	'view' is a valid view.
 *
 *\li	'tmgr' is a valid timer manager.
 *
 *\li	ntatablep != NULL && *ntatablep == NULL
 *
 * Ensures:
 *
 *\li	On success, *ntatablep is a valid, empty NTA table.
 *
 * Returns:
 *
 *\li	ISC_R_SUCCESS
 *\li	Any other result indicates failure.
 */

void
dns_ntatable_attach(dns_ntatable_t *source, dns_ntatable_t **targetp);
/*%<
 * Attach *targetp to source.
 *
 * Requires:
 *
 *\li	'source' is a valid ntatable.
 *
 *\li	'targetp' points to a NULL dns_ntatable_t *.
 *
 * Ensures:
 *
 *\li	*targetp is attached to source.
 */

void
dns_ntatable_detach(dns_ntatable_t **ntatablep);
/*%<
 * Detach *ntatablep from its ntatable.
 *
 * Requires:
 *
 *\li	'ntatablep' points to a valid ntatable.
 *
 * Ensures:
 *
 *\li	*ntatablep is NULL.
 *
 *\li	If '*ntatablep' is the last reference to the ntatable,
 *		all resources used by the ntatable will be freed
 */

isc_result_t
dns_ntatable_add(dns_ntatable_t *ntatable, const dns_name_t *name, bool force,
		 isc_stdtime_t now, uint32_t lifetime);
/*%<
 * Add a negative trust anchor to 'ntatable' for name 'name',
 * which will expire at time 'now' + 'lifetime'.  If 'force' is true,
 * then the NTA will persist for the entire specified lifetime.
 * If it is false, then the name will be queried periodically and
 * validation will be attempted to see whether it's still bogus;
 * if validation is successful, the NTA will be allowed to expire
 * early and validation below the NTA will resume.
 *
 * Notes:
 *
 *\li   If an NTA already exists in the table, its expiry time
 *      is updated.
 *
 * Requires:
 *
 *\li	'ntatable' points to a valid ntatable.
 *
 *\li	'name' points to a valid name.
 *
 * Returns:
 *
 *\li	ISC_R_SUCCESS
 *
 *\li	Any other result indicates failure.
 */

isc_result_t
dns_ntatable_delete(dns_ntatable_t *ntatable, const dns_name_t *keyname);
/*%<
 * Delete node(s) from 'ntatable' matching name 'keyname'
 *
 * Requires:
 *
 *\li	'ntatable' points to a valid ntatable.
 *
 *\li	'name' is not NULL
 *
 * Returns:
 *
 *\li	ISC_R_SUCCESS
 *
 *\li	Any other result indicates failure.
 */

bool
dns_ntatable_covered(dns_ntatable_t *ntatable, isc_stdtime_t now,
		     const dns_name_t *name, const dns_name_t *anchor);
/*%<
 * Return true if 'name' is below a non-expired negative trust
 * anchor which in turn is at or below 'anchor'.
 *
 * If 'ntatable' has not been initialized, return false.
 *
 * Requires:
 *
 *\li	'ntatable' is NULL or is a valid ntatable.
 *
 *\li	'name' is a valid absolute name.
 */

isc_result_t
dns_ntatable_totext(dns_ntatable_t *ntatable, const char *view,
		    isc_buffer_t **buf);
/*%<
 * Dump the NTA table to buffer at 'buf', with view names
 *
 * Requires:
 * \li   "ntatable" is a valid table.
 *
 * \li   "*buf" is a valid buffer.
 */

isc_result_t
dns_ntatable_save(dns_ntatable_t *ntatable, FILE *fp);
/*%<
 * Save the NTA table to the file opened as 'fp', for later loading.
 */

void
dns_ntatable_shutdown(dns_ntatable_t *ntatable);
/*%<
 * Cancel future checks to see if NTAs can be removed.
 */

ISC_LANG_ENDDECLS