2 * Copyright (C) 2004-2014 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2003 Internet Software Consortium.
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.
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.
31 * A "view" is a DNS namespace, together with an optional resolver and a
32 * forwarding policy. A "DNS namespace" is a (possibly empty) set of
33 * authoritative zones together with an optional cache and optional
34 * "hints" information.
36 * Views start out "unfrozen". In this state, core attributes like
37 * the cache, set of zones, and forwarding policy may be set. While
38 * "unfrozen", the caller (e.g. nameserver configuration loading
39 * code), must ensure exclusive access to the view. When the view is
40 * "frozen", the core attributes become immutable, and the view module
41 * will ensure synchronization. Freezing allows the view's core attributes
42 * to be accessed without locking.
45 *\li Before the view is frozen, the caller must ensure synchronization.
47 *\li After the view is frozen, the module guarantees appropriate
48 * synchronization of any data structures it creates and manipulates.
51 *\li No anticipated impact.
57 *\li No anticipated impact.
66 #include <isc/magic.h>
67 #include <isc/event.h>
68 #include <isc/mutex.h>
70 #include <isc/refcount.h>
71 #include <isc/rwlock.h>
72 #include <isc/stdtime.h>
75 #include <dns/fixedname.h>
77 #include <dns/rdatastruct.h>
79 #include <dns/types.h>
88 dns_rdataclass_t rdclass;
91 dns_dlzdb_t * dlzdatabase;
92 dns_resolver_t * resolver;
94 dns_requestmgr_t * requestmgr;
95 dns_acache_t * acache;
102 * internal use only; access via * dns_view_getsecroots()
104 dns_keytable_t * secroots_priv;
107 isc_boolean_t frozen;
109 isc_event_t resevent;
110 isc_event_t adbevent;
111 isc_event_t reqevent;
112 isc_stats_t * resstats;
113 dns_stats_t * resquerystats;
114 isc_boolean_t cacheshared;
116 /* Configurable data. */
117 dns_tsig_keyring_t * statickeys;
118 dns_tsig_keyring_t * dynamickeys;
119 dns_peerlist_t * peers;
121 dns_fwdtable_t * fwdtable;
122 isc_boolean_t recursion;
123 isc_boolean_t auth_nxdomain;
124 isc_boolean_t additionalfromcache;
125 isc_boolean_t additionalfromauth;
126 isc_boolean_t minimalresponses;
127 isc_boolean_t enablednssec;
128 isc_boolean_t enablevalidation;
129 isc_boolean_t acceptexpired;
130 dns_transfer_format_t transfer_format;
131 dns_acl_t * cacheacl;
132 dns_acl_t * cacheonacl;
133 dns_acl_t * queryacl;
134 dns_acl_t * queryonacl;
135 dns_acl_t * recursionacl;
136 dns_acl_t * recursiononacl;
137 dns_acl_t * sortlist;
138 dns_acl_t * notifyacl;
139 dns_acl_t * transferacl;
140 dns_acl_t * updateacl;
141 dns_acl_t * upfwdacl;
142 dns_acl_t * denyansweracl;
143 dns_acl_t * nocasecompress;
144 dns_rbt_t * answeracl_exclude;
145 dns_rbt_t * denyanswernames;
146 dns_rbt_t * answernames_exclude;
148 isc_boolean_t provideixfr;
149 isc_boolean_t requestnsid;
150 dns_ttl_t maxcachettl;
151 dns_ttl_t maxncachettl;
154 dns_rdatatype_t preferred_glue;
156 dns_namelist_t * delonly;
157 isc_boolean_t rootdelonly;
158 dns_namelist_t * rootexclude;
159 isc_boolean_t checknames;
161 dns_fixedname_t dlv_fixed;
163 unsigned int maxbits;
164 dns_v4_aaaa_t v4_aaaa;
165 dns_acl_t * v4_aaaa_acl;
166 dns_dns64list_t dns64;
167 unsigned int dns64cnt;
168 ISC_LIST(dns_rpz_zone_t) rpz_zones;
169 isc_boolean_t rpz_recursive_only;
170 isc_boolean_t rpz_break_dnssec;
171 unsigned int rpz_min_ns_labels;
174 * Configurable data for server use only,
175 * locked by server configuration lock.
177 dns_acl_t * matchclients;
178 dns_acl_t * matchdestinations;
179 isc_boolean_t matchrecursiveonly;
181 /* Locked by themselves. */
182 isc_refcount_t references;
184 /* Locked by lock. */
185 unsigned int weakrefs;
186 unsigned int attributes;
187 /* Under owner's locking control. */
188 ISC_LINK(struct dns_view) link;
189 dns_viewlist_t * viewlist;
191 dns_zone_t * managed_keys;
192 dns_zone_t * redirect;
195 /* File in which to store configuration for newly added zones */
196 char * new_zone_file;
198 void * new_zone_config;
199 void (*cfg_destroy)(void **);
203 #define DNS_VIEW_MAGIC ISC_MAGIC('V','i','e','w')
204 #define DNS_VIEW_VALID(view) ISC_MAGIC_VALID(view, DNS_VIEW_MAGIC)
206 #define DNS_VIEWATTR_RESSHUTDOWN 0x01
207 #define DNS_VIEWATTR_ADBSHUTDOWN 0x02
208 #define DNS_VIEWATTR_REQSHUTDOWN 0x04
211 dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
212 const char *name, dns_view_t **viewp);
218 *\li The newly created view has no cache, no resolver, and an empty
219 * zone table. The view is not frozen.
223 *\li 'mctx' is a valid memory context.
225 *\li 'rdclass' is a valid class.
227 *\li 'name' is a valid C string.
229 *\li viewp != NULL && *viewp == NULL
236 *\li Other errors are possible.
240 dns_view_attach(dns_view_t *source, dns_view_t **targetp);
242 * Attach '*targetp' to 'source'.
246 *\li 'source' is a valid, frozen view.
248 *\li 'targetp' points to a NULL dns_view_t *.
252 *\li *targetp is attached to source.
254 *\li While *targetp is attached, the view will not shut down.
258 dns_view_detach(dns_view_t **viewp);
260 * Detach '*viewp' from its view.
264 *\li 'viewp' points to a valid dns_view_t *
272 dns_view_flushanddetach(dns_view_t **viewp);
274 * Detach '*viewp' from its view. If this was the last reference
275 * uncommitted changed in zones will be flushed to disk.
279 *\li 'viewp' points to a valid dns_view_t *
287 dns_view_weakattach(dns_view_t *source, dns_view_t **targetp);
289 * Weakly attach '*targetp' to 'source'.
293 *\li 'source' is a valid, frozen view.
295 *\li 'targetp' points to a NULL dns_view_t *.
299 *\li *targetp is attached to source.
301 * \li While *targetp is attached, the view will not be freed.
305 dns_view_weakdetach(dns_view_t **targetp);
307 * Detach '*viewp' from its view.
311 *\li 'viewp' points to a valid dns_view_t *.
319 dns_view_createresolver(dns_view_t *view,
320 isc_taskmgr_t *taskmgr,
321 unsigned int ntasks, unsigned int ndisp,
322 isc_socketmgr_t *socketmgr,
323 isc_timermgr_t *timermgr,
324 unsigned int options,
325 dns_dispatchmgr_t *dispatchmgr,
326 dns_dispatch_t *dispatchv4,
327 dns_dispatch_t *dispatchv6);
329 * Create a resolver and address database for the view.
333 *\li 'view' is a valid, unfrozen view.
335 *\li 'view' does not have a resolver already.
337 *\li The requirements of dns_resolver_create() apply to 'taskmgr',
338 * 'ntasks', 'socketmgr', 'timermgr', 'options', 'dispatchv4', and
345 *\li Any error that dns_resolver_create() can return.
349 dns_view_setcache(dns_view_t *view, dns_cache_t *cache);
351 dns_view_setcache2(dns_view_t *view, dns_cache_t *cache, isc_boolean_t shared);
353 * Set the view's cache database. If 'shared' is true, this means the cache
354 * is created by another view and is shared with that view. dns_view_setcache()
355 * is a backward compatible version equivalent to setcache2(..., ISC_FALSE).
359 *\li 'view' is a valid, unfrozen view.
361 *\li 'cache' is a valid cache.
365 * \li The cache of 'view' is 'cached.
367 *\li If this is not the first call to dns_view_setcache() for this
368 * view, then previously set cache is detached.
372 dns_view_sethints(dns_view_t *view, dns_db_t *hints);
374 * Set the view's hints database.
378 *\li 'view' is a valid, unfrozen view, whose hints database has not been
381 *\li 'hints' is a valid zone database.
385 * \li The hints database of 'view' is 'hints'.
389 dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring);
391 dns_view_setdynamickeyring(dns_view_t *view, dns_tsig_keyring_t *ring);
393 * Set the view's static TSIG keys
397 * \li 'view' is a valid, unfrozen view, whose static TSIG keyring has not
400 *\li 'ring' is a valid TSIG keyring
404 *\li The static TSIG keyring of 'view' is 'ring'.
408 dns_view_getdynamickeyring(dns_view_t *view, dns_tsig_keyring_t **ringp);
410 * Return the views dynamic keys.
412 * \li 'view' is a valid, unfrozen view.
413 * \li 'ringp' != NULL && ringp == NULL.
417 dns_view_setdstport(dns_view_t *view, in_port_t dstport);
419 * Set the view's destination port. This is the port to
420 * which outgoing queries are sent. The default is 53,
421 * the standard DNS port.
425 *\li 'view' is a valid view.
427 *\li 'dstport' is a valid TCP/UDP port number.
430 *\li External name servers will be assumed to be listening
431 * on 'dstport'. For servers whose address has already
432 * obtained obtained at the time of the call, the view may
433 * continue to use the previously set port until the address
434 * times out from the view's address database.
439 dns_view_addzone(dns_view_t *view, dns_zone_t *zone);
441 * Add zone 'zone' to 'view'.
445 *\li 'view' is a valid, unfrozen view.
447 *\li 'zone' is a valid zone.
451 dns_view_freeze(dns_view_t *view);
453 * Freeze view. No changes can be made to view configuration while frozen.
457 *\li 'view' is a valid, unfrozen view.
461 *\li 'view' is frozen.
465 dns_view_thaw(dns_view_t *view);
467 * Thaw view. This allows zones to be added or removed at runtime. This is
468 * NOT thread-safe; the caller MUST have run isc_task_exclusive() prior to
473 *\li 'view' is a valid, frozen view.
477 *\li 'view' is no longer frozen.
480 dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
481 isc_stdtime_t now, unsigned int options, isc_boolean_t use_hints,
482 dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
483 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
485 dns_view_find2(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
486 isc_stdtime_t now, unsigned int options,
487 isc_boolean_t use_hints, isc_boolean_t use_static_stub,
488 dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
489 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
491 * Find an rdataset whose owner name is 'name', and whose type is
493 * In general, this function first searches view's zone and cache DBs for the
494 * best match data against 'name'. If nothing found there, and if 'use_hints'
495 * is ISC_TRUE, the view's hint DB (if configured) is searched.
496 * If the view is configured with a static-stub zone which gives the longest
497 * match for 'name' among the zones, however, the cache DB is not consulted
498 * unless 'use_static_stub' is ISC_FALSE (see below about this argument).
500 * dns_view_find() is a backward compatible version equivalent to
501 * dns_view_find2() with use_static_stub argument being ISC_FALSE.
505 *\li See the description of dns_db_find() for information about 'options'.
506 * If the caller sets #DNS_DBFIND_GLUEOK, it must ensure that 'name'
507 * and 'type' are appropriate for glue retrieval.
509 *\li If 'now' is zero, then the current time will be used.
511 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
512 * it will be searched last. If the answer is found in the hints
513 * database, the result code will be DNS_R_HINT. If the name is found
514 * in the hints database but not the type, the result code will be
515 * #DNS_R_HINTNXRRSET.
517 *\li If 'use_static_stub' is ISC_FALSE and the longest match zone for 'name'
518 * is a static-stub zone, it's ignored and the cache and/or hints will be
519 * searched. In the majority of the cases this argument should be
520 * ISC_FALSE. The only known usage of this argument being ISC_TRUE is
521 * if this search is for a "bailiwick" glue A or AAAA RRset that may
522 * best match a static-stub zone. Consider the following example:
523 * this view is configured with a static-stub zone "example.com",
524 * and an attempt of recursive resolution needs to send a query for the
525 * zone. In this case it's quite likely that the resolver is trying to
526 * find A/AAAA RRs for the apex name "example.com". And, to honor the
527 * static-stub configuration it needs to return the glue RRs in the
528 * static-stub zone even if that exact RRs coming from the authoritative
529 * zone has been cached.
530 * In other general cases, the requested data is better to be
531 * authoritative, either locally configured or retrieved from an external
532 * server, and the data in the static-stub zone should better be ignored.
534 *\li 'foundname' must meet the requirements of dns_db_find().
536 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
537 * covers 'type', then 'sigrdataset' will be bound to it.
541 *\li 'view' is a valid, frozen view.
543 *\li 'name' is valid name.
545 *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type
546 * except dns_rdatatype_any.
548 *\li dbp == NULL || *dbp == NULL
550 *\li nodep == NULL || *nodep == NULL. If nodep != NULL, dbp != NULL.
552 *\li 'foundname' is a valid name with a dedicated buffer or NULL.
554 *\li 'rdataset' is a valid, disassociated rdataset.
556 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
560 *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are
561 * bound to the found data.
563 *\li If dbp != NULL, it points to the database containing the data.
565 *\li If nodep != NULL, it points to the database node containing the data.
567 *\li If foundname != NULL, it contains the full name of the found data.
571 *\li Any result that dns_db_find() can return, with the exception of
576 dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
577 isc_stdtime_t now, unsigned int options,
578 isc_boolean_t use_hints,
579 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
581 * Find an rdataset whose owner name is 'name', and whose type is
586 *\li This routine is appropriate for simple, exact-match queries of the
587 * view. 'name' must be a canonical name; there is no DNAME or CNAME
590 *\li See the description of dns_db_find() for information about 'options'.
591 * If the caller sets DNS_DBFIND_GLUEOK, it must ensure that 'name'
592 * and 'type' are appropriate for glue retrieval.
594 *\li If 'now' is zero, then the current time will be used.
596 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
597 * it will be searched last. If the answer is found in the hints
598 * database, the result code will be DNS_R_HINT. If the name is found
599 * in the hints database but not the type, the result code will be
602 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
603 * covers 'type', then 'sigrdataset' will be bound to it.
607 *\li 'view' is a valid, frozen view.
609 *\li 'name' is valid name.
611 *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type
612 * (e.g. dns_rdatatype_any), or dns_rdatatype_rrsig.
614 *\li 'rdataset' is a valid, disassociated rdataset.
616 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
620 *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are
621 * bound to the found data.
625 *\li #ISC_R_SUCCESS Success; result is desired type.
626 *\li DNS_R_GLUE Success; result is glue.
627 *\li DNS_R_HINT Success; result is a hint.
628 *\li DNS_R_NCACHENXDOMAIN Success; result is a ncache entry.
629 *\li DNS_R_NCACHENXRRSET Success; result is a ncache entry.
630 *\li DNS_R_NXDOMAIN The name does not exist.
631 *\li DNS_R_NXRRSET The rrset does not exist.
632 *\li #ISC_R_NOTFOUND No matching data found,
633 * or an error occurred.
636 /*% See dns_view_findzonecut2() */
638 dns_view_findzonecut(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
639 isc_stdtime_t now, unsigned int options,
640 isc_boolean_t use_hints,
641 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
644 dns_view_findzonecut2(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
645 isc_stdtime_t now, unsigned int options,
646 isc_boolean_t use_hints, isc_boolean_t use_cache,
647 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
649 * Find the best known zonecut containing 'name'.
651 * This uses local authority, cache, and optionally hints data.
652 * No external queries are performed.
656 *\li If 'now' is zero, then the current time will be used.
658 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
659 * it will be searched last.
661 *\li If 'use_cache' is ISC_TRUE, and the view has a cache, then it will be
664 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
665 * covers 'type', then 'sigrdataset' will be bound to it.
667 *\li If the DNS_DBFIND_NOEXACT option is set, then the zonecut returned
668 * (if any) will be the deepest known ancestor of 'name'.
672 *\li 'view' is a valid, frozen view.
674 *\li 'name' is valid name.
676 *\li 'rdataset' is a valid, disassociated rdataset.
678 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
682 *\li #ISC_R_SUCCESS Success.
684 *\li Many other results are possible.
688 dns_viewlist_find(dns_viewlist_t *list, const char *name,
689 dns_rdataclass_t rdclass, dns_view_t **viewp);
691 * Search for a view with name 'name' and class 'rdclass' in 'list'.
692 * If found, '*viewp' is (strongly) attached to it.
696 *\li 'viewp' points to a NULL dns_view_t *.
700 *\li #ISC_R_SUCCESS A matching view was found.
701 *\li #ISC_R_NOTFOUND No matching view was found.
705 dns_viewlist_findzone(dns_viewlist_t *list, dns_name_t *name, isc_boolean_t allclasses,
706 dns_rdataclass_t rdclass, dns_zone_t **zonep);
709 * Search zone with 'name' in view with 'rdclass' in viewlist 'list'
710 * If found, zone is returned in *zonep. If allclasses is set rdclass is ignored
713 *\li #ISC_R_SUCCESS A matching zone was found.
714 *\li #ISC_R_NOTFOUND No matching zone was found.
715 *\li #ISC_R_MULTIPLE Multiple zones with the same name were found.
719 dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep);
721 * Search for the zone 'name' in the zone table of 'view'.
722 * If found, 'zonep' is (strongly) attached to it. There
723 * are no partial matches.
727 *\li 'zonep' points to a NULL dns_zone_t *.
730 *\li #ISC_R_SUCCESS A matching zone was found.
731 *\li #ISC_R_NOTFOUND No matching zone was found.
732 *\li others An error occurred.
736 dns_view_load(dns_view_t *view, isc_boolean_t stop);
739 dns_view_loadnew(dns_view_t *view, isc_boolean_t stop);
742 dns_view_asyncload(dns_view_t *view, dns_zt_allloaded_t callback, void *arg);
744 * Load zones attached to this view. dns_view_load() loads
745 * all zones whose master file has changed since the last
746 * load; dns_view_loadnew() loads only zones that have never
749 * dns_view_asyncload() loads zones asynchronously. When all zones
750 * in the view have finished loading, 'callback' is called with argument
751 * 'arg' to inform the caller.
753 * If 'stop' is ISC_TRUE, stop on the first error and return it.
754 * If 'stop' is ISC_FALSE (or we are loading asynchronously), ignore errors.
758 *\li 'view' is valid.
762 dns_view_gettsig(dns_view_t *view, dns_name_t *keyname,
763 dns_tsigkey_t **keyp);
765 * Find the TSIG key configured in 'view' with name 'keyname',
769 *\li keyp points to a NULL dns_tsigkey_t *.
772 *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it.
773 *\li #ISC_R_NOTFOUND No key was found.
774 *\li others An error occurred.
778 dns_view_getpeertsig(dns_view_t *view, isc_netaddr_t *peeraddr,
779 dns_tsigkey_t **keyp);
781 * Find the TSIG key configured in 'view' for the server whose
782 * address is 'peeraddr', if any.
785 * keyp points to a NULL dns_tsigkey_t *.
788 *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it.
789 *\li #ISC_R_NOTFOUND No key was found.
790 *\li others An error occurred.
794 dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg);
796 * Verifies the signature of a message.
800 *\li 'view' is a valid view.
801 *\li 'source' is a valid buffer containing the message
802 *\li 'msg' is a valid message
805 *\li see dns_tsig_verify()
809 dns_view_dialup(dns_view_t *view);
811 * Perform dialup-time maintenance on the zones of 'view'.
815 dns_view_dumpdbtostream(dns_view_t *view, FILE *fp);
817 * Dump the current state of the view 'view' to the stream 'fp'
818 * for purposes of analysis or debugging.
820 * Currently the dumped state includes the view's cache; in the future
821 * it may also include other state such as the address database.
822 * It will not not include authoritative data since it is voluminous and
823 * easily obtainable by other means.
827 *\li 'view' is valid.
829 *\li 'fp' refers to a file open for writing.
832 * \li ISC_R_SUCCESS The cache was successfully dumped.
833 * \li others An error occurred (see dns_master_dump)
837 dns_view_flushcache(dns_view_t *view);
839 dns_view_flushcache2(dns_view_t *view, isc_boolean_t fixuponly);
841 * Flush the view's cache (and ADB). If 'fixuponly' is true, it only updates
842 * the internal reference to the cache DB with omitting actual flush operation.
843 * 'fixuponly' is intended to be used for a view that shares a cache with
844 * a different view. dns_view_flushcache() is a backward compatible version
845 * that always sets fixuponly to false.
850 * No other tasks are executing.
858 dns_view_flushnode(dns_view_t *view, dns_name_t *name, isc_boolean_t tree);
860 * Flush the given name from the view's cache (and optionally ADB/badcache).
862 * If 'tree' is true, flush 'name' and all names below it
863 * from the cache, but do not flush ADB.
865 * If 'tree' is false, flush 'name' frmo both the cache and ADB,
866 * but do not touch any other nodes.
869 *\li 'view' is valid.
870 *\li 'name' is valid.
874 * other returns are failures.
878 dns_view_flushname(dns_view_t *view, dns_name_t *name);
880 * Flush the given name from the view's cache, ADB and badcache.
881 * Equivalent to dns_view_flushnode(view, name, ISC_FALSE).
885 *\li 'view' is valid.
886 *\li 'name' is valid.
890 * other returns are failures.
894 dns_view_adddelegationonly(dns_view_t *view, dns_name_t *name);
896 * Add the given name to the delegation only table.
899 *\li 'view' is valid.
900 *\li 'name' is valid.
908 dns_view_excludedelegationonly(dns_view_t *view, dns_name_t *name);
910 * Add the given name to be excluded from the root-delegation-only.
914 *\li 'view' is valid.
915 *\li 'name' is valid.
923 dns_view_isdelegationonly(dns_view_t *view, dns_name_t *name);
925 * Check if 'name' is in the delegation only table or if
926 * rootdelonly is set that name is not being excluded.
929 *\li 'view' is valid.
930 *\li 'name' is valid.
933 *\li #ISC_TRUE if the name is the table.
934 *\li #ISC_FALSE otherwise.
938 dns_view_setrootdelonly(dns_view_t *view, isc_boolean_t value);
940 * Set the root delegation only flag.
943 *\li 'view' is valid.
947 dns_view_getrootdelonly(dns_view_t *view);
949 * Get the root delegation only flag.
952 *\li 'view' is valid.
956 dns_view_freezezones(dns_view_t *view, isc_boolean_t freeze);
958 * Freeze/thaw updates to master zones.
961 * \li 'view' is valid.
965 dns_view_setresstats(dns_view_t *view, isc_stats_t *stats);
967 * Set a general resolver statistics counter set 'stats' for 'view'.
970 * \li 'view' is valid and is not frozen.
972 *\li stats is a valid statistics supporting resolver statistics counters
977 dns_view_getresstats(dns_view_t *view, isc_stats_t **statsp);
979 * Get the general statistics counter set for 'view'. If a statistics set is
980 * set '*statsp' will be attached to the set; otherwise, '*statsp' will be
984 * \li 'view' is valid and is not frozen.
986 *\li 'statsp' != NULL && '*statsp' != NULL
990 dns_view_setresquerystats(dns_view_t *view, dns_stats_t *stats);
992 * Set a statistics counter set of rdata type, 'stats', for 'view'. Once the
993 * statistic set is installed, view's resolver will count outgoing queries
997 * \li 'view' is valid and is not frozen.
999 *\li stats is a valid statistics created by dns_rdatatypestats_create().
1003 dns_view_getresquerystats(dns_view_t *view, dns_stats_t **statsp);
1005 * Get the rdatatype statistics counter set for 'view'. If a statistics set is
1006 * set '*statsp' will be attached to the set; otherwise, '*statsp' will be
1010 * \li 'view' is valid and is not frozen.
1012 *\li 'statsp' != NULL && '*statsp' != NULL
1016 dns_view_iscacheshared(dns_view_t *view);
1018 * Check if the view shares the cache created by another view.
1021 * \li 'view' is valid.
1024 *\li #ISC_TRUE if the cache is shared.
1025 *\li #ISC_FALSE otherwise.
1029 dns_view_initsecroots(dns_view_t *view, isc_mem_t *mctx);
1031 * Initialize security roots for the view. (Note that secroots is
1032 * NULL until this function is called, so any function using
1033 * secroots must check its validity first. One way to do this is
1034 * use dns_view_getsecroots() and check its return value.)
1037 * \li 'view' is valid.
1038 * \li 'view->secroots' is NULL.
1042 *\li Any other result indicates failure
1046 dns_view_getsecroots(dns_view_t *view, dns_keytable_t **ktp);
1048 * Get the security roots for this view. Returns ISC_R_NOTFOUND if
1049 * the security roots keytable has not been initialized for the view.
1051 * '*ktp' is attached on success; the caller is responsible for
1052 * detaching it with dns_keytable_detach().
1055 * \li 'view' is valid.
1056 * \li 'ktp' is not NULL and '*ktp' is NULL.
1064 dns_view_issecuredomain(dns_view_t *view, dns_name_t *name,
1065 isc_boolean_t *secure_domain);
1067 * Is 'name' at or beneath a trusted key? Put answer in
1071 * \li 'view' is valid.
1075 *\li Any other value indicates failure
1079 dns_view_untrust(dns_view_t *view, dns_name_t *keyname,
1080 dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx);
1082 * Remove keys that match 'keyname' and 'dnskey' from the views trust
1086 * \li 'view' is valid.
1087 * \li 'keyname' is valid.
1088 * \li 'mctx' is valid.
1089 * \li 'dnskey' is valid.
1093 dns_view_setnewzones(dns_view_t *view, isc_boolean_t allow, void *cfgctx,
1094 void (*cfg_destroy)(void **));
1096 * Set whether or not to allow zones to be created or deleted at runtime.
1098 * If 'allow' is ISC_TRUE, determines the filename into which new zone
1099 * configuration will be written. Preserves the configuration context
1100 * (a pointer to which is passed in 'cfgctx') for use when parsing new
1101 * zone configuration. 'cfg_destroy' points to a callback routine to
1102 * destroy the configuration context when the view is destroyed. (This
1103 * roundabout method is used in order to avoid libdns having a dependency
1104 * on libisccfg and libbind9.)
1106 * If 'allow' is ISC_FALSE, removes any existing references to
1107 * configuration context and frees any memory.
1110 * \li 'view' is valid.
1114 dns_view_restorekeyring(dns_view_t *view);
1118 #endif /* DNS_VIEW_H */