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File nsec.h

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * 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.
 */

#ifndef DNS_NSEC_H
#define DNS_NSEC_H 1

/*! \file dns/nsec.h */

#include <stdbool.h>

#include <isc/lang.h>

#include <dns/types.h>
#include <dns/name.h>

#define DNS_NSEC_BUFFERSIZE (DNS_NAME_MAXWIRE + 8192 + 512)

ISC_LANG_BEGINDECLS

isc_result_t
dns_nsec_buildrdata(dns_db_t *db, dns_dbversion_t *version,
		    dns_dbnode_t *node, dns_name_t *target,
		    unsigned char *buffer, dns_rdata_t *rdata);
/*%<
 * Build the rdata of a NSEC record.
 *
 * Requires:
 *\li	buffer	Points to a temporary buffer of at least
 * 		DNS_NSEC_BUFFERSIZE bytes.
 *\li	rdata	Points to an initialized dns_rdata_t.
 *
 * Ensures:
 *  \li    *rdata	Contains a valid NSEC rdata.  The 'data' member refers
 *		to 'buffer'.
 */

isc_result_t
dns_nsec_build(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node,
	       dns_name_t *target, dns_ttl_t ttl);
/*%<
 * Build a NSEC record and add it to a database.
 */

bool
dns_nsec_typepresent(dns_rdata_t *nsec, dns_rdatatype_t type);
/*%<
 * Determine if a type is marked as present in an NSEC record.
 *
 * Requires:
 *\li	'nsec' points to a valid rdataset of type NSEC
 */

isc_result_t
dns_nsec_nseconly(dns_db_t *db, dns_dbversion_t *version,
		  bool *answer);
/*
 * Report whether the DNSKEY RRset has a NSEC only algorithm.  Unknown
 * algorithms are assumed to support NSEC3.  If DNSKEY is not found,
 * *answer is set to false, and ISC_R_NOTFOUND is returned.
 *
 * Requires:
 * 	'answer' to be non NULL.
 */

unsigned int
dns_nsec_compressbitmap(unsigned char *map, const unsigned char *raw,
			unsigned int max_type);
/*%<
 * Convert a raw bitmap into a compressed windowed bit map.  'map' and 'raw'
 * may overlap.
 *
 * Returns the length of the compressed windowed bit map.
 */

void
dns_nsec_setbit(unsigned char *array, unsigned int type, unsigned int bit);
/*%<
 * Set type bit in raw 'array' to 'bit'.
 */

bool
dns_nsec_isset(const unsigned char *array, unsigned int type);
/*%<
 * Test if the corresponding 'type' bit is set in 'array'.
 */

isc_result_t
dns_nsec_noexistnodata(dns_rdatatype_t type, dns_name_t *name,
		       dns_name_t *nsecname, dns_rdataset_t *nsecset,
		       bool *exists, bool *data,
		       dns_name_t *wild, dns_nseclog_t log, void *arg);
/*%
 * Return ISC_R_SUCCESS if we can determine that the name doesn't exist
 * or we can determine whether there is data or not at the name.
 * If the name does not exist return the wildcard name.
 *
 * Return ISC_R_IGNORE when the NSEC is not the appropriate one.
 */

ISC_LANG_ENDDECLS

#endif /* DNS_NSEC_H */

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acache.h	text/x-c	13.9 KB	-rw-r--r--	2025-11-06 07:45:36
acl.h	text/x-c	7.07 KB	-rw-r--r--	2025-11-06 07:45:36
adb.h	text/x-c	22.07 KB	-rw-r--r--	2025-11-06 07:45:36
badcache.h	text/x-c	3.29 KB	-rw-r--r--	2025-11-06 07:45:36
bit.h	text/x-c	807 B	-rw-r--r--	2025-11-06 07:45:36
byaddr.h	text/x-c	3.91 KB	-rw-r--r--	2025-11-06 07:45:36
cache.h	text/x-c	8.44 KB	-rw-r--r--	2025-11-06 07:45:36
callbacks.h	text/x-c	2.22 KB	-rw-r--r--	2025-11-06 07:45:36
catz.h	text/x-c	11.56 KB	-rw-r--r--	2025-11-06 07:45:36
cert.h	text/x-c	1.43 KB	-rw-r--r--	2025-11-06 07:45:36
client.h	text/x-c	21.53 KB	-rw-r--r--	2025-11-06 07:45:36
clientinfo.h	text/x-c	1.96 KB	-rw-r--r--	2025-11-06 07:45:36
compress.h	text/x-c	6.49 KB	-rw-r--r--	2025-11-06 07:45:36
db.h	text/x-c	45.96 KB	-rw-r--r--	2025-11-06 07:45:36
dbiterator.h	text/x-c	7.25 KB	-rw-r--r--	2025-11-06 07:45:36
dbtable.h	text/x-c	3.09 KB	-rw-r--r--	2025-11-06 07:45:36
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dlz_dlopen.h	text/x-c	4.57 KB	-rw-r--r--	2025-11-06 07:45:36
dns64.h	text/x-c	5.5 KB	-rw-r--r--	2025-11-06 07:45:36
dnssec.h	text/x-c	11.83 KB	-rw-r--r--	2025-11-06 07:45:36
dnstap.h	text/x-c	9.14 KB	-rw-r--r--	2025-11-06 07:45:36
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geoip.h	text/x-c	2.73 KB	-rw-r--r--	2025-11-06 07:45:36
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iptable.h	text/x-c	1.58 KB	-rw-r--r--	2025-11-06 07:45:36
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keydata.h	text/x-c	1.03 KB	-rw-r--r--	2025-11-06 07:45:36
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ncache.h	text/x-c	4.81 KB	-rw-r--r--	2025-11-06 07:45:36
nsec.h	text/x-c	2.86 KB	-rw-r--r--	2025-11-06 07:45:36
nsec3.h	text/x-c	7.84 KB	-rw-r--r--	2025-11-06 07:45:36
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