Gecko [ paxlifestyle.com ]

Name	Size	Permission	Date
acl.h	8.74 KB	-rw-r--r--	2025-01-20 13:39
adb.h	21.28 KB	-rw-r--r--	2025-01-20 13:39
badcache.h	3.28 KB	-rw-r--r--	2025-01-20 13:39
bit.h	788 B	-rw-r--r--	2025-01-20 13:39
byaddr.h	3.5 KB	-rw-r--r--	2025-01-20 13:39
cache.h	6.68 KB	-rw-r--r--	2025-01-20 13:39
callbacks.h	2.04 KB	-rw-r--r--	2025-01-20 13:39
catz.h	12.03 KB	-rw-r--r--	2025-01-20 13:39
cert.h	1.42 KB	-rw-r--r--	2025-01-20 13:39
client.h	9.18 KB	-rw-r--r--	2025-01-20 13:39
clientinfo.h	2.58 KB	-rw-r--r--	2025-01-20 13:39
compress.h	6.86 KB	-rw-r--r--	2025-01-20 13:39
db.h	49.1 KB	-rw-r--r--	2025-01-20 13:39
dbiterator.h	7.18 KB	-rw-r--r--	2025-01-20 13:39
diff.h	6.86 KB	-rw-r--r--	2025-01-20 13:39
dispatch.h	10.25 KB	-rw-r--r--	2026-03-27 00:00
dlz.h	10.61 KB	-rw-r--r--	2025-01-20 13:39
dlz_dlopen.h	4.27 KB	-rw-r--r--	2025-01-20 13:39
dns64.h	6.22 KB	-rw-r--r--	2025-01-20 13:39
dnsrps.h	2.49 KB	-rw-r--r--	2025-01-20 13:39
dnssec.h	12.86 KB	-rw-r--r--	2025-01-20 13:39
dnstap.h	9.95 KB	-rw-r--r--	2025-01-20 13:39
ds.h	1.62 KB	-rw-r--r--	2025-01-20 13:39
dsdigest.h	1.65 KB	-rw-r--r--	2025-01-20 13:39
dyndb.h	4.8 KB	-rw-r--r--	2025-01-20 13:39
ecs.h	1.91 KB	-rw-r--r--	2025-01-20 13:39
edns.h	763 B	-rw-r--r--	2025-01-20 13:39
enumclass.h	1.13 KB	-rw-r--r--	2026-03-27 00:00
enumtype.h	8.42 KB	-rw-r--r--	2026-03-27 00:00
events.h	4.33 KB	-rw-r--r--	2025-01-20 13:39
fixedname.h	1.59 KB	-rw-r--r--	2025-01-20 13:39
forward.h	3.13 KB	-rw-r--r--	2025-01-20 13:39
geoip.h	2.27 KB	-rw-r--r--	2025-01-20 13:39
ipkeylist.h	2.13 KB	-rw-r--r--	2025-01-20 13:39
iptable.h	1.46 KB	-rw-r--r--	2025-01-20 13:39
journal.h	9.46 KB	-rw-r--r--	2025-01-20 13:39
kasp.h	12.46 KB	-rw-r--r--	2025-01-20 13:39
keydata.h	1 KB	-rw-r--r--	2025-01-20 13:39
keyflags.h	1.22 KB	-rw-r--r--	2025-01-20 13:39
keymgr.h	3.99 KB	-rw-r--r--	2025-01-20 13:39
keytable.h	7.85 KB	-rw-r--r--	2025-01-20 13:39
keyvalues.h	3.96 KB	-rw-r--r--	2025-01-20 13:39
librpz.h	30.29 KB	-rw-r--r--	2025-01-20 13:39
log.h	3.91 KB	-rw-r--r--	2025-01-20 13:39
lookup.h	2.84 KB	-rw-r--r--	2025-01-20 13:39
master.h	8.52 KB	-rw-r--r--	2025-01-20 13:39
masterdump.h	9.64 KB	-rw-r--r--	2025-01-20 13:39
message.h	41.35 KB	-rw-r--r--	2026-03-27 00:00
name.h	36.35 KB	-rw-r--r--	2025-01-20 13:39
ncache.h	4.83 KB	-rw-r--r--	2025-01-20 13:39
nsec.h	3.43 KB	-rw-r--r--	2025-01-20 13:39
nsec3.h	8.05 KB	-rw-r--r--	2025-01-20 13:39
nta.h	4.6 KB	-rw-r--r--	2025-01-20 13:39
opcode.h	987 B	-rw-r--r--	2025-01-20 13:39
order.h	1.95 KB	-rw-r--r--	2025-01-20 13:39
peer.h	4.8 KB	-rw-r--r--	2025-01-20 13:39
private.h	1.89 KB	-rw-r--r--	2025-01-20 13:39
rbt.h	34.66 KB	-rw-r--r--	2025-01-20 13:39
rcode.h	2.4 KB	-rw-r--r--	2025-01-20 13:39
rdata.h	22.21 KB	-rw-r--r--	2025-01-20 13:39
rdataclass.h	2.17 KB	-rw-r--r--	2025-01-20 13:39
rdatalist.h	2.47 KB	-rw-r--r--	2025-01-20 13:39
rdataset.h	18.67 KB	-rw-r--r--	2025-01-20 13:39
rdatasetiter.h	3.81 KB	-rw-r--r--	2025-01-20 13:39
rdataslab.h	4.11 KB	-rw-r--r--	2025-01-20 13:39
rdatastruct.h	60.33 KB	-rw-r--r--	2026-03-27 00:00
rdatatype.h	2.21 KB	-rw-r--r--	2025-01-20 13:39
request.h	8.67 KB	-rw-r--r--	2026-03-27 00:00
resolver.h	18.7 KB	-rw-r--r--	2025-01-20 13:39
result.h	689 B	-rw-r--r--	2025-01-20 13:39
rootns.h	872 B	-rw-r--r--	2025-01-20 13:39
rpz.h	12.22 KB	-rw-r--r--	2025-01-20 13:39
rriterator.h	4.09 KB	-rw-r--r--	2025-01-20 13:39
rrl.h	6.8 KB	-rw-r--r--	2025-01-20 13:39
sdb.h	7.17 KB	-rw-r--r--	2025-01-20 13:39
sdlz.h	13.75 KB	-rw-r--r--	2025-01-20 13:39
secalg.h	1.65 KB	-rw-r--r--	2025-01-20 13:39
secproto.h	1.5 KB	-rw-r--r--	2025-01-20 13:39
soa.h	2.12 KB	-rw-r--r--	2025-01-20 13:39
ssu.h	7.6 KB	-rw-r--r--	2025-01-20 13:39
stats.h	24.15 KB	-rw-r--r--	2025-01-20 13:39
time.h	1.64 KB	-rw-r--r--	2025-01-20 13:39
tkey.h	7.46 KB	-rw-r--r--	2025-01-20 13:39
transport.h	5.93 KB	-rw-r--r--	2026-03-27 00:00
tsec.h	2.86 KB	-rw-r--r--	2025-01-20 13:39
tsig.h	8.18 KB	-rw-r--r--	2025-01-20 13:39
ttl.h	1.82 KB	-rw-r--r--	2025-01-20 13:39
types.h	14.03 KB	-rw-r--r--	2026-03-27 00:00
update.h	1.94 KB	-rw-r--r--	2025-01-20 13:39
validator.h	6.6 KB	-rw-r--r--	2025-01-20 13:39
view.h	36.94 KB	-rw-r--r--	2025-01-20 13:39
xfrin.h	2.26 KB	-rw-r--r--	2025-01-20 13:39
zone.h	63.88 KB	-rw-r--r--	2025-01-20 13:39
zonekey.h	754 B	-rw-r--r--	2025-01-20 13:39
zoneverify.h	1.4 KB	-rw-r--r--	2025-01-20 13:39
zt.h	5.02 KB	-rw-r--r--	2025-01-20 13:39

Rename

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * 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.
 */

#pragma once

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

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

#include <dns/name.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

/*
 * DNS_COMPRESS_TABLESIZE must be a power of 2. The compress code
 * utilizes this assumption.
 */
#define DNS_COMPRESS_TABLEBITS	  6
#define DNS_COMPRESS_TABLESIZE	  (1U << DNS_COMPRESS_TABLEBITS)
#define DNS_COMPRESS_TABLEMASK	  (DNS_COMPRESS_TABLESIZE - 1)
#define DNS_COMPRESS_INITIALNODES 24
#define DNS_COMPRESS_ARENA_SIZE	  640

typedef struct dns_compressnode dns_compressnode_t;

struct dns_compressnode {
	dns_compressnode_t *next;
	uint16_t	    offset;
	uint16_t	    count;
	isc_region_t	    r;
	dns_name_t	    name;
};

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 arena for names. */
	unsigned char arena[DNS_COMPRESS_ARENA_SIZE];
	off_t	      arena_off;
	/*% 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