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/*
* 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 http://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 <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.
*/
isc_boolean_t
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,
isc_boolean_t *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 ISC_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'.
*/
isc_boolean_t
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,
isc_boolean_t *exists, isc_boolean_t *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 */