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/*
* Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2001, 2003 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: nsec.h,v 1.12 2008/09/25 04:02:39 tbox Exp $ */
#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.
*
* Requires:
* 'answer' to be non NULL.
*/
ISC_LANG_ENDDECLS
#endif /* DNS_NSEC_H */
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