fixedname.h 2.11 KB
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/*
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 * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
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 * Copyright (C) 1999-2001  Internet Software Consortium.
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 *
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 * 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.
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 *
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 * 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.
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 */

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/* $Id: fixedname.h,v 1.13 2004/03/05 05:09:42 marka Exp $ */
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#ifndef DNS_FIXEDNAME_H
#define DNS_FIXEDNAME_H 1

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

/*
 * Fixed-size Names
 *
 * dns_fixedname_t is a convenience type containing a name, an offsets table,
 * and a dedicated buffer big enough for the longest possible name.
 *
 * MP:
 *	The caller must ensure any required synchronization.
 *
 * Reliability:
 *	No anticipated impact.
 *
 * Resources:
 *	Per dns_fixedname_t:
 *		sizeof(dns_name_t) + sizeof(dns_offsets_t) +
 *		sizeof(isc_buffer_t) + 255 bytes + structure padding
 *
 * Security:
 *	No anticipated impact.
 *
 * Standards:
 *	None.
 */

/*****
 ***** Imports
 *****/

#include <isc/buffer.h>

#include <dns/name.h>

/*****
 ***** Types
 *****/

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struct dns_fixedname {
	dns_name_t			name;
	dns_offsets_t			offsets;
	isc_buffer_t			buffer;
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	unsigned char			data[DNS_NAME_MAXWIRE];
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};
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#define dns_fixedname_init(fn) \
	do { \
		dns_name_init(&((fn)->name), (fn)->offsets); \
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		isc_buffer_init(&((fn)->buffer), (fn)->data, \
                                  DNS_NAME_MAXWIRE); \
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		dns_name_setbuffer(&((fn)->name), &((fn)->buffer)); \
	} while (0)

#define dns_fixedname_invalidate(fn) \
	dns_name_invalidate(&((fn)->name))

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#define dns_fixedname_name(fn)		(&((fn)->name))

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#endif /* DNS_FIXEDNAME_H */