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/contrib/bind9/lib/dns/include/dns/fixedname.h

https://bitbucket.org/freebsd/freebsd-head/
C++ Header | 86 lines | 21 code | 13 blank | 52 comment | 1 complexity | 0642098ff327a4f780f4f4fd3de233b6 MD5 | raw file
 1/*
 2 * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
 3 * Copyright (C) 1999-2001  Internet Software Consortium.
 4 *
 5 * Permission to use, copy, modify, and/or distribute this software for any
 6 * purpose with or without fee is hereby granted, provided that the above
 7 * copyright notice and this permission notice appear in all copies.
 8 *
 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: fixedname.h,v 1.19 2007/06/19 23:47:16 tbox Exp $ */
19
20#ifndef DNS_FIXEDNAME_H
21#define DNS_FIXEDNAME_H 1
22
23/*****
24 ***** Module Info
25 *****/
26
27/*! \file dns/fixedname.h
28 * \brief
29 * Fixed-size Names
30 *
31 * dns_fixedname_t is a convenience type containing a name, an offsets table,
32 * and a dedicated buffer big enough for the longest possible name.
33 *
34 * MP:
35 *\li	The caller must ensure any required synchronization.
36 *
37 * Reliability:
38 *\li	No anticipated impact.
39 *
40 * Resources:
41 *\li	Per dns_fixedname_t:
42 *\code
43 *		sizeof(dns_name_t) + sizeof(dns_offsets_t) +
44 *		sizeof(isc_buffer_t) + 255 bytes + structure padding
45 *\endcode
46 *
47 * Security:
48 *\li	No anticipated impact.
49 *
50 * Standards:
51 *\li	None.
52 */
53
54/*****
55 ***** Imports
56 *****/
57
58#include <isc/buffer.h>
59
60#include <dns/name.h>
61
62/*****
63 ***** Types
64 *****/
65
66struct dns_fixedname {
67	dns_name_t			name;
68	dns_offsets_t			offsets;
69	isc_buffer_t			buffer;
70	unsigned char			data[DNS_NAME_MAXWIRE];
71};
72
73#define dns_fixedname_init(fn) \
74	do { \
75		dns_name_init(&((fn)->name), (fn)->offsets); \
76		isc_buffer_init(&((fn)->buffer), (fn)->data, \
77                                  DNS_NAME_MAXWIRE); \
78		dns_name_setbuffer(&((fn)->name), &((fn)->buffer)); \
79	} while (0)
80
81#define dns_fixedname_invalidate(fn) \
82	dns_name_invalidate(&((fn)->name))
83
84#define dns_fixedname_name(fn)		(&((fn)->name))
85
86#endif /* DNS_FIXEDNAME_H */