FM / dns

/usr/include/bind9/dns

Name	Size	Mode	Actions
acache.h	14232	0644	edit dl rm
acl.h	7242	0644	edit dl rm
adb.h	22595	0644	edit dl rm
badcache.h	3369	0644	edit dl rm
bit.h	807	0644	edit dl rm
byaddr.h	4002	0644	edit dl rm
cache.h	8643	0644	edit dl rm
callbacks.h	2271	0644	edit dl rm
catz.h	11833	0644	edit dl rm
cert.h	1466	0644	edit dl rm
client.h	22042	0644	edit dl rm
clientinfo.h	2006	0644	edit dl rm
compress.h	6646	0644	edit dl rm
db.h	47061	0644	edit dl rm
dbiterator.h	7422	0644	edit dl rm
dbtable.h	3165	0644	edit dl rm
diff.h	6980	0644	edit dl rm
dispatch.h	16427	0644	edit dl rm
dlz.h	10618	0644	edit dl rm
dlz_dlopen.h	4677	0644	edit dl rm
dns64.h	5635	0644	edit dl rm
dnssec.h	12371	0644	edit dl rm
dnstap.h	9364	0644	edit dl rm
ds.h	1225	0644	edit dl rm
dsdigest.h	1722	0644	edit dl rm
dyndb.h	4835	0644	edit dl rm
ecdb.h	809	0644	edit dl rm
edns.h	722	0644	edit dl rm
enumclass.h	1220	0644	edit dl rm
enumtype.h	8300	0644	edit dl rm
events.h	4059	0644	edit dl rm
fixedname.h	1663	0644	edit dl rm
forward.h	3452	0644	edit dl rm
geoip.h	2792	0644	edit dl rm
ipkeylist.h	2186	0644	edit dl rm
iptable.h	1621	0644	edit dl rm
journal.h	8227	0644	edit dl rm
keydata.h	1059	0644	edit dl rm
keyflags.h	1278	0644	edit dl rm
keytable.h	9462	0644	edit dl rm
keyvalues.h	4159	0644	edit dl rm
lib.h	1192	0644	edit dl rm
log.h	3964	0644	edit dl rm
lookup.h	2924	0644	edit dl rm
master.h	11289	0644	edit dl rm
masterdump.h	12647	0644	edit dl rm
message.h	39023	0644	edit dl rm
name.h	37115	0644	edit dl rm
ncache.h	4929	0644	edit dl rm
nsec.h	3397	0644	edit dl rm
nsec3.h	8032	0644	edit dl rm
nta.h	4548	0644	edit dl rm
opcode.h	1007	0644	edit dl rm
order.h	1999	0644	edit dl rm
peer.h	5966	0644	edit dl rm
portlist.h	2101	0644	edit dl rm
private.h	1935	0644	edit dl rm
rbt.h	40618	0644	edit dl rm
rcode.h	2481	0644	edit dl rm
rdata.h	21613	0644	edit dl rm
rdataclass.h	2257	0644	edit dl rm
rdatalist.h	2569	0644	edit dl rm
rdataset.h	21536	0644	edit dl rm
rdatasetiter.h	3926	0644	edit dl rm
rdataslab.h	4528	0644	edit dl rm
rdatastruct.h	61584	0644	edit dl rm
rdatatype.h	2298	0644	edit dl rm
request.h	11156	0644	edit dl rm
resolver.h	20227	0644	edit dl rm
result.h	9284	0644	edit dl rm
rootns.h	892	0644	edit dl rm
rpz.h	10335	0644	edit dl rm
rriterator.h	4230	0644	edit dl rm
rrl.h	6640	0644	edit dl rm
sdb.h	7224	0644	edit dl rm
sdlz.h	14214	0644	edit dl rm
secalg.h	1706	0644	edit dl rm
secproto.h	1557	0644	edit dl rm
soa.h	2186	0644	edit dl rm
ssu.h	8308	0644	edit dl rm
stats.h	13451	0644	edit dl rm
tcpmsg.h	3145	0644	edit dl rm
time.h	1695	0644	edit dl rm
timer.h	1051	0644	edit dl rm
tkey.h	7631	0644	edit dl rm
tsec.h	2949	0644	edit dl rm
tsig.h	8384	0644	edit dl rm
ttl.h	1945	0644	edit dl rm
types.h	14212	0644	edit dl rm
update.h	1653	0644	edit dl rm
validator.h	7161	0644	edit dl rm
version.h	868	0644	edit dl rm
view.h	35274	0644	edit dl rm
xfrin.h	2924	0644	edit dl rm
zone.h	60864	0644	edit dl rm
zonekey.h	777	0644	edit dl rm
zt.h	5562	0644	edit dl rm

Edit: /usr/include/bind9/dns/compress.h (6646B)

/*
 * 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 https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#ifndef DNS_COMPRESS_H
#define DNS_COMPRESS_H 1

#include <inttypes.h>
#include <stdbool.h>

#include <isc/lang.h>
#include <isc/region.h>

#include <dns/types.h>

ISC_LANG_BEGINDECLS

/*! \file dns/compress.h
 * Direct manipulation of the structures is strongly discouraged.
 *
 * A name compression context handles compression of multiple DNS names
 * in relation to a single DNS message. The context can be used to
 * selectively turn on/off compression for specific names (depending on
 * the RR type) by using \c dns_compress_setmethods(). Alternately,
 * compression can be disabled completely using \c
 * dns_compress_disable().
 *
 * \c dns_compress_setmethods() is intended for use by RDATA towire()
 * implementations, whereas \c dns_compress_disable() is intended to be
 * used by a nameserver's configuration manager.
 */

#define DNS_COMPRESS_NONE		0x00	/*%< no compression */
#define DNS_COMPRESS_GLOBAL14		0x01	/*%< "normal" compression. */
#define DNS_COMPRESS_ALL		0x01	/*%< all compression. */
#define DNS_COMPRESS_CASESENSITIVE	0x02	/*%< case sensitive compression. */
#define DNS_COMPRESS_ENABLED		0x04

#define DNS_COMPRESS_READY		0x80000000

#define DNS_COMPRESS_TABLESIZE 64
#define DNS_COMPRESS_INITIALNODES 16

typedef struct dns_compressnode dns_compressnode_t;

struct dns_compressnode {
	isc_region_t		r;
	uint16_t		offset;
	uint16_t		count;
	uint8_t			labels;
	dns_compressnode_t	*next;
};

struct dns_compress {
	unsigned int		magic;		/*%< Magic number. */
	unsigned int		allowed;	/*%< Allowed methods. */
	int			edns;		/*%< Edns version or -1. */
	/*% Global compression table. */
	dns_compressnode_t	*table[DNS_COMPRESS_TABLESIZE];
	/*% Preallocated nodes for the table. */
	dns_compressnode_t	initialnodes[DNS_COMPRESS_INITIALNODES];
	uint16_t		count;		/*%< Number of nodes. */
	isc_mem_t		*mctx;		/*%< Memory context. */
};

typedef enum {
	DNS_DECOMPRESS_ANY,			/*%< Any compression */
	DNS_DECOMPRESS_STRICT,			/*%< Allowed compression */
	DNS_DECOMPRESS_NONE			/*%< No compression */
} dns_decompresstype_t;

struct dns_decompress {
	unsigned int		magic;		/*%< Magic number. */
	unsigned int		allowed;	/*%< Allowed methods. */
	int			edns;		/*%< Edns version or -1. */
	dns_decompresstype_t	type;		/*%< Strict checking */
};

isc_result_t
dns_compress_init(dns_compress_t *cctx, int edns, isc_mem_t *mctx);
/*%<
 *	Initialise the compression context structure pointed to by
 *	'cctx'. A freshly initialized context has name compression
 *	enabled, but no methods are set. Please use \c
 *	dns_compress_setmethods() to set a compression method.
 *
 *	Requires:
 *	\li	'cctx' is a valid dns_compress_t structure.
 *	\li	'mctx' is an initialized memory context.
 *	Ensures:
 *	\li	cctx->global is initialized.
 *
 *	Returns:
 *	\li	#ISC_R_SUCCESS
 */

void
dns_compress_invalidate(dns_compress_t *cctx);

/*%<
 *	Invalidate the compression structure pointed to by cctx.
 *
 *	Requires:
 *\li		'cctx' to be initialized.
 */

void
dns_compress_setmethods(dns_compress_t *cctx, unsigned int allowed);

/*%<
 *	Sets allowed compression methods.
 *
 *	Requires:
 *\li		'cctx' to be initialized.
 */

unsigned int
dns_compress_getmethods(dns_compress_t *cctx);

/*%<
 *	Gets allowed compression methods.
 *
 *	Requires:
 *\li		'cctx' to be initialized.
 *
 *	Returns:
 *\li		allowed compression bitmap.
 */

void
dns_compress_disable(dns_compress_t *cctx);
/*%<
 *	Disables all name compression in the context. Once disabled,
 *	name compression cannot currently be re-enabled.
 *
 *	Requires:
 *\li		'cctx' to be initialized.
 *
 */

void
dns_compress_setsensitive(dns_compress_t *cctx, bool sensitive);

/*
 *	Preserve the case of compressed domain names.
 *
 *	Requires:
 *		'cctx' to be initialized.
 */

bool
dns_compress_getsensitive(dns_compress_t *cctx);
/*
 *	Return whether case is to be preserved when compressing
 *	domain names.
 *
 *	Requires:
 *		'cctx' to be initialized.
 */

int
dns_compress_getedns(dns_compress_t *cctx);

/*%<
 *	Gets edns value.
 *
 *	Requires:
 *\li		'cctx' to be initialized.
 *
 *	Returns:
 *\li		-1 .. 255
 */

bool
dns_compress_findglobal(dns_compress_t *cctx, const dns_name_t *name,
			dns_name_t *prefix, uint16_t *offset);
/*%<
 *	Finds longest possible match of 'name' in the global compression table.
 *
 *	Requires:
 *\li		'cctx' to be initialized.
 *\li		'name' to be a absolute name.
 *\li		'prefix' to be initialized.
 *\li		'offset' to point to an uint16_t.
 *
 *	Ensures:
 *\li		'prefix' and 'offset' are valid if true is 	returned.
 *
 *	Returns:
 *\li		#true / #false
 */

void
dns_compress_add(dns_compress_t *cctx, const dns_name_t *name,
		 const dns_name_t *prefix, uint16_t offset);
/*%<
 *	Add compression pointers for 'name' to the compression table,
 *	not replacing existing pointers.
 *
 *	Requires:
 *\li		'cctx' initialized
 *
 *\li		'name' must be initialized and absolute, and must remain
 *		valid until the message compression is complete.
 *
 *\li		'prefix' must be a prefix returned by
 *		dns_compress_findglobal(), or the same as 'name'.
 */

void
dns_compress_rollback(dns_compress_t *cctx, uint16_t offset);

/*%<
 *	Remove any compression pointers from global table >= offset.
 *
 *	Requires:
 *\li		'cctx' is initialized.
 */

void
dns_decompress_init(dns_decompress_t *dctx, int edns,
		    dns_decompresstype_t type);

/*%<
 *	Initializes 'dctx'.
 *	Records 'edns' and 'type' into the structure.
 *
 *	Requires:
 *\li		'dctx' to be a valid pointer.
 */

void
dns_decompress_invalidate(dns_decompress_t *dctx);

/*%<
 *	Invalidates 'dctx'.
 *
 *	Requires:
 *\li		'dctx' to be initialized
 */

void
dns_decompress_setmethods(dns_decompress_t *dctx, unsigned int allowed);

/*%<
 *	Sets 'dctx->allowed' to 'allowed'.
 *
 *	Requires:
 *\li		'dctx' to be initialized
 */

unsigned int
dns_decompress_getmethods(dns_decompress_t *dctx);

/*%<
 *	Returns 'dctx->allowed'
 *
 *	Requires:
 *\li		'dctx' to be initialized
 */

int
dns_decompress_edns(dns_decompress_t *dctx);

/*%<
 *	Returns 'dctx->edns'
 *
 *	Requires:
 *\li		'dctx' to be initialized
 */

dns_decompresstype_t
dns_decompress_type(dns_decompress_t *dctx);

/*%<
 *	Returns 'dctx->type'
 *
 *	Requires:
 *\li		'dctx' to be initialized
 */

ISC_LANG_ENDDECLS

#endif /* DNS_COMPRESS_H */

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