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/validator.h (7161B)

/*
 * 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_VALIDATOR_H
#define DNS_VALIDATOR_H 1

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

/*! \file dns/validator.h
 *
 * \brief
 * DNS Validator
 * This is the BIND 9 validator, the module responsible for validating the
 * rdatasets and negative responses (messages).  It makes use of zones in
 * the view and may fetch RRset to complete trust chains.  It implements
 * DNSSEC as specified in RFC 4033, 4034 and 4035.
 *
 * It can also optionally implement ISC's DNSSEC look-aside validation.
 *
 * Correct operation is critical to preventing spoofed answers from secure
 * zones being accepted.
 *
 * MP:
 *\li	The module ensures appropriate synchronization of data structures it
 *	creates and manipulates.
 *
 * Reliability:
 *\li	No anticipated impact.
 *
 * Resources:
 *\li	TBS
 *
 * Security:
 *\li	No anticipated impact.
 *
 * Standards:
 *\li	RFCs:	1034, 1035, 2181, 4033, 4034, 4035.
 */

#include <stdbool.h>

#include <isc/lang.h>
#include <isc/event.h>
#include <isc/mutex.h>

#include <dns/fixedname.h>
#include <dns/types.h>
#include <dns/rdataset.h>
#include <dns/rdatastruct.h> /* for dns_rdata_rrsig_t */

#include <dst/dst.h>

/*%
 * A dns_validatorevent_t is sent when a 'validation' completes.
 * \brief
 * 'name', 'rdataset', 'sigrdataset', and 'message' are the values that were
 * supplied when dns_validator_create() was called.  They are returned to the
 * caller so that they may be freed.
 *
 * If the RESULT is ISC_R_SUCCESS and the answer is secure then
 * proofs[] will contain the names of the NSEC records that hold the
 * various proofs.  Note the same name may appear multiple times.
 */
typedef struct dns_validatorevent {
	ISC_EVENT_COMMON(struct dns_validatorevent);
	dns_validator_t *		validator;
	isc_result_t			result;
	/*
	 * Name and type of the response to be validated.
	 */
	dns_name_t *			name;
	dns_rdatatype_t			type;
	/*
	 * Rdata and RRSIG (if any) for positive responses.
	 */
	dns_rdataset_t *		rdataset;
	dns_rdataset_t *		sigrdataset;
	/*
	 * The full response.  Required for negative responses.
	 * Also required for positive wildcard responses.
	 */
	dns_message_t *			message;
	/*
	 * Proofs to be cached.
	 */
	dns_name_t *			proofs[4];
	/*
	 * Optout proof seen.
	 */
	bool			optout;
	/*
	 * Answer is secure.
	 */
	bool			secure;
} dns_validatorevent_t;

#define DNS_VALIDATOR_NOQNAMEPROOF 0
#define DNS_VALIDATOR_NODATAPROOF 1
#define DNS_VALIDATOR_NOWILDCARDPROOF 2
#define DNS_VALIDATOR_CLOSESTENCLOSER 3

/*%
 * A validator object represents a validation in progress.
 * \brief
 * Clients are strongly discouraged from using this type directly, with
 * the exception of the 'link' field, which may be used directly for
 * whatever purpose the client desires.
 */
struct dns_validator {
	/* Unlocked. */
	unsigned int			magic;
	isc_mutex_t			lock;
	dns_view_t *			view;
	/* Locked by lock. */
	unsigned int			options;
	unsigned int			attributes;
	dns_validatorevent_t *		event;
	dns_fetch_t *			fetch;
	dns_validator_t *		subvalidator;
	dns_validator_t *		parent;
	dns_keytable_t *		keytable;
	dns_keynode_t *			keynode;
	dst_key_t *			key;
	dns_rdata_rrsig_t *		siginfo;
	isc_task_t *			task;
	isc_taskaction_t		action;
	void *				arg;
	unsigned int			labels;
	dns_rdataset_t *		currentset;
	bool			seensig;
	dns_rdataset_t *		keyset;
	dns_rdataset_t *		dsset;
	dns_rdataset_t *		soaset;
	dns_rdataset_t *		nsecset;
	dns_rdataset_t *		nsec3set;
	dns_name_t *			soaname;
	dns_rdataset_t			frdataset;
	dns_rdataset_t			fsigrdataset;
	dns_fixedname_t			fname;
	dns_fixedname_t			wild;
	dns_fixedname_t			nearest;
	dns_fixedname_t			closest;
	ISC_LINK(dns_validator_t)	link;
	dns_rdataset_t 			dlv;
	dns_fixedname_t			dlvsep;
	bool			havedlvsep;
	bool			mustbesecure;
	unsigned int			dlvlabels;
	unsigned int			depth;
	unsigned int			authcount;
	unsigned int			authfail;
	bool				failed;
	isc_stdtime_t			start;
};

/*%
 * dns_validator_create() options.
 */
#define DNS_VALIDATOR_DLV		0x0001U
#define DNS_VALIDATOR_DEFER		0x0002U
#define DNS_VALIDATOR_NOCDFLAG		0x0004U
#define DNS_VALIDATOR_NONTA		0x0008U  /*% Ignore NTA table */

ISC_LANG_BEGINDECLS

isc_result_t
dns_validator_create(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
		     dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset,
		     dns_message_t *message, unsigned int options,
		     isc_task_t *task, isc_taskaction_t action, void *arg,
		     dns_validator_t **validatorp);
/*%<
 * Start a DNSSEC validation.
 *
 * This validates a response to the question given by
 * 'name' and 'type'.
 *
 * To validate a positive response, the response data is
 * given by 'rdataset' and 'sigrdataset'.  If 'sigrdataset'
 * is NULL, the data is presumed insecure and an attempt
 * is made to prove its insecurity by finding the appropriate
 * null key.
 *
 * The complete response message may be given in 'message',
 * to make available any authority section NSECs that may be
 * needed for validation of a response resulting from a
 * wildcard expansion (though no such wildcard validation
 * is implemented yet).  If the complete response message
 * is not available, 'message' is NULL.
 *
 * To validate a negative response, the complete negative response
 * message is given in 'message'.  The 'rdataset', and
 * 'sigrdataset' arguments must be NULL, but the 'name' and 'type'
 * arguments must be provided.
 *
 * The validation is performed in the context of 'view'.
 *
 * When the validation finishes, a dns_validatorevent_t with
 * the given 'action' and 'arg' are sent to 'task'.
 * Its 'result' field will be ISC_R_SUCCESS iff the
 * response was successfully proven to be either secure or
 * part of a known insecure domain.
 *
 * options:
 * If DNS_VALIDATOR_DLV is set the caller knows there is not a
 * trusted key and the validator should immediately attempt to validate
 * the answer by looking for an appropriate DLV RRset.
 */

void
dns_validator_send(dns_validator_t *validator);
/*%<
 * Send a deferred validation request
 *
 * Requires:
 *	'validator' to points to a valid DNSSEC validator.
 */

void
dns_validator_cancel(dns_validator_t *validator);
/*%<
 * Cancel a DNSSEC validation in progress.
 *
 * Requires:
 *\li	'validator' points to a valid DNSSEC validator, which
 *	may or may not already have completed.
 *
 * Ensures:
 *\li	It the validator has not already sent its completion
 *	event, it will send it with result code ISC_R_CANCELED.
 */

void
dns_validator_destroy(dns_validator_t **validatorp);
/*%<
 * Destroy a DNSSEC validator.
 *
 * Requires:
 *\li	'*validatorp' points to a valid DNSSEC validator.
 * \li	The validator must have completed and sent its completion
 * 	event.
 *
 * Ensures:
 *\li	All resources used by the validator are freed.
 */

ISC_LANG_ENDDECLS

#endif /* DNS_VALIDATOR_H */

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