/*
 * Copyright (C) 1999, 2000  Internet Software Consortium.
 * 
 * Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM 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: nxt.h,v 1.8 2000/06/22 21:55:52 tale Exp $ */

#ifndef DNS_NXT_H
#define DNS_NXT_H 1

#include <isc/lang.h>

#include <dns/types.h>

#define DNS_NXT_BUFFERSIZE (256 + 16)

ISC_LANG_BEGINDECLS

isc_result_t
dns_buildnxtrdata(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 NXT record.
 *
 * Requires:
 *	buffer	Points to a temporary buffer of at least
 * 		DNS_NXT_BUFFERSIZE bytes.
 *	rdata	Points to an initialized dns_rdata_t.
 *
 * Ensures:
 *      *rdata	Contains a valid NXT rdata.  The 'data' member refers
 *		to 'buffer'.
 */

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

isc_boolean_t
dns_nxt_typepresent(dns_rdata_t *nxt, dns_rdatatype_t type);
/*
 * Determine if a type is marked as present in an NXT record.
 *
 * Requires:
 *	'nxt' points to a valid rdataset of type NXT
 *	'type' < 128
 *
 */

ISC_LANG_ENDDECLS

#endif /* DNS_NXT_H */
