2 * Copyright (C) 2004-2013 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>
76 #include <dns/rdatastruct.h>
78 #include <dns/types.h>
87 dns_rdataclass_t rdclass;
90 dns_dlzdb_t * dlzdatabase;
91 dns_resolver_t * resolver;
93 dns_requestmgr_t * requestmgr;
94 dns_acache_t * acache;
101 * internal use only; access via * dns_view_getsecroots()
103 dns_keytable_t * secroots_priv;
106 isc_boolean_t frozen;
108 isc_event_t resevent;
109 isc_event_t adbevent;
110 isc_event_t reqevent;
111 isc_stats_t * resstats;
112 dns_stats_t * resquerystats;
113 isc_boolean_t cacheshared;
115 /* Configurable data. */
116 dns_tsig_keyring_t * statickeys;
117 dns_tsig_keyring_t * dynamickeys;
118 dns_peerlist_t * peers;
120 dns_fwdtable_t * fwdtable;
121 isc_boolean_t recursion;
122 isc_boolean_t auth_nxdomain;
123 isc_boolean_t additionalfromcache;
124 isc_boolean_t additionalfromauth;
125 isc_boolean_t minimalresponses;
126 isc_boolean_t enablednssec;
127 isc_boolean_t enablevalidation;
128 isc_boolean_t acceptexpired;
129 dns_transfer_format_t transfer_format;
130 dns_acl_t * cacheacl;
131 dns_acl_t * cacheonacl;
132 dns_acl_t * queryacl;
133 dns_acl_t * queryonacl;
134 dns_acl_t * recursionacl;
135 dns_acl_t * recursiononacl;
136 dns_acl_t * sortlist;
137 dns_acl_t * notifyacl;
138 dns_acl_t * transferacl;
139 dns_acl_t * updateacl;
140 dns_acl_t * upfwdacl;
141 dns_acl_t * denyansweracl;
142 dns_rbt_t * answeracl_exclude;
143 dns_rbt_t * denyanswernames;
144 dns_rbt_t * answernames_exclude;
145 isc_boolean_t provideixfr;
146 isc_boolean_t requestnsid;
147 dns_ttl_t maxcachettl;
148 dns_ttl_t maxncachettl;
151 dns_rdatatype_t preferred_glue;
153 dns_namelist_t * delonly;
154 isc_boolean_t rootdelonly;
155 dns_namelist_t * rootexclude;
156 isc_boolean_t checknames;
158 dns_fixedname_t dlv_fixed;
160 unsigned int maxbits;
161 dns_v4_aaaa_t v4_aaaa;
162 dns_acl_t * v4_aaaa_acl;
163 dns_dns64list_t dns64;
164 unsigned int dns64cnt;
165 ISC_LIST(dns_rpz_zone_t) rpz_zones;
166 isc_boolean_t rpz_recursive_only;
167 isc_boolean_t rpz_break_dnssec;
168 unsigned int rpz_min_ns_labels;
171 * Configurable data for server use only,
172 * locked by server configuration lock.
174 dns_acl_t * matchclients;
175 dns_acl_t * matchdestinations;
176 isc_boolean_t matchrecursiveonly;
178 /* Locked by themselves. */
179 isc_refcount_t references;
181 /* Locked by lock. */
182 unsigned int weakrefs;
183 unsigned int attributes;
184 /* Under owner's locking control. */
185 ISC_LINK(struct dns_view) link;
186 dns_viewlist_t * viewlist;
188 dns_zone_t * managed_keys;
189 dns_zone_t * redirect;
192 /* File in which to store configuration for newly added zones */
193 char * new_zone_file;
195 void * new_zone_config;
196 void (*cfg_destroy)(void **);
200 #define DNS_VIEW_MAGIC ISC_MAGIC('V','i','e','w')
201 #define DNS_VIEW_VALID(view) ISC_MAGIC_VALID(view, DNS_VIEW_MAGIC)
203 #define DNS_VIEWATTR_RESSHUTDOWN 0x01
204 #define DNS_VIEWATTR_ADBSHUTDOWN 0x02
205 #define DNS_VIEWATTR_REQSHUTDOWN 0x04
208 dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
209 const char *name, dns_view_t **viewp);
215 *\li The newly created view has no cache, no resolver, and an empty
216 * zone table. The view is not frozen.
220 *\li 'mctx' is a valid memory context.
222 *\li 'rdclass' is a valid class.
224 *\li 'name' is a valid C string.
226 *\li viewp != NULL && *viewp == NULL
233 *\li Other errors are possible.
237 dns_view_attach(dns_view_t *source, dns_view_t **targetp);
239 * Attach '*targetp' to 'source'.
243 *\li 'source' is a valid, frozen view.
245 *\li 'targetp' points to a NULL dns_view_t *.
249 *\li *targetp is attached to source.
251 *\li While *targetp is attached, the view will not shut down.
255 dns_view_detach(dns_view_t **viewp);
257 * Detach '*viewp' from its view.
261 *\li 'viewp' points to a valid dns_view_t *
269 dns_view_flushanddetach(dns_view_t **viewp);
271 * Detach '*viewp' from its view. If this was the last reference
272 * uncommitted changed in zones will be flushed to disk.
276 *\li 'viewp' points to a valid dns_view_t *
284 dns_view_weakattach(dns_view_t *source, dns_view_t **targetp);
286 * Weakly attach '*targetp' to 'source'.
290 *\li 'source' is a valid, frozen view.
292 *\li 'targetp' points to a NULL dns_view_t *.
296 *\li *targetp is attached to source.
298 * \li While *targetp is attached, the view will not be freed.
302 dns_view_weakdetach(dns_view_t **targetp);
304 * Detach '*viewp' from its view.
308 *\li 'viewp' points to a valid dns_view_t *.
316 dns_view_createresolver(dns_view_t *view,
317 isc_taskmgr_t *taskmgr,
318 unsigned int ntasks, unsigned int ndisp,
319 isc_socketmgr_t *socketmgr,
320 isc_timermgr_t *timermgr,
321 unsigned int options,
322 dns_dispatchmgr_t *dispatchmgr,
323 dns_dispatch_t *dispatchv4,
324 dns_dispatch_t *dispatchv6);
326 * Create a resolver and address database for the view.
330 *\li 'view' is a valid, unfrozen view.
332 *\li 'view' does not have a resolver already.
334 *\li The requirements of dns_resolver_create() apply to 'taskmgr',
335 * 'ntasks', 'socketmgr', 'timermgr', 'options', 'dispatchv4', and
342 *\li Any error that dns_resolver_create() can return.
346 dns_view_setcache(dns_view_t *view, dns_cache_t *cache);
348 dns_view_setcache2(dns_view_t *view, dns_cache_t *cache, isc_boolean_t shared);
350 * Set the view's cache database. If 'shared' is true, this means the cache
351 * is created by another view and is shared with that view. dns_view_setcache()
352 * is a backward compatible version equivalent to setcache2(..., ISC_FALSE).
356 *\li 'view' is a valid, unfrozen view.
358 *\li 'cache' is a valid cache.
362 * \li The cache of 'view' is 'cached.
364 *\li If this is not the first call to dns_view_setcache() for this
365 * view, then previously set cache is detached.
369 dns_view_sethints(dns_view_t *view, dns_db_t *hints);
371 * Set the view's hints database.
375 *\li 'view' is a valid, unfrozen view, whose hints database has not been
378 *\li 'hints' is a valid zone database.
382 * \li The hints database of 'view' is 'hints'.
386 dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring);
388 dns_view_setdynamickeyring(dns_view_t *view, dns_tsig_keyring_t *ring);
390 * Set the view's static TSIG keys
394 * \li 'view' is a valid, unfrozen view, whose static TSIG keyring has not
397 *\li 'ring' is a valid TSIG keyring
401 *\li The static TSIG keyring of 'view' is 'ring'.
405 dns_view_getdynamickeyring(dns_view_t *view, dns_tsig_keyring_t **ringp);
407 * Return the views dynamic keys.
409 * \li 'view' is a valid, unfrozen view.
410 * \li 'ringp' != NULL && ringp == NULL.
414 dns_view_setdstport(dns_view_t *view, in_port_t dstport);
416 * Set the view's destination port. This is the port to
417 * which outgoing queries are sent. The default is 53,
418 * the standard DNS port.
422 *\li 'view' is a valid view.
424 *\li 'dstport' is a valid TCP/UDP port number.
427 *\li External name servers will be assumed to be listening
428 * on 'dstport'. For servers whose address has already
429 * obtained obtained at the time of the call, the view may
430 * continue to use the previously set port until the address
431 * times out from the view's address database.
436 dns_view_addzone(dns_view_t *view, dns_zone_t *zone);
438 * Add zone 'zone' to 'view'.
442 *\li 'view' is a valid, unfrozen view.
444 *\li 'zone' is a valid zone.
448 dns_view_freeze(dns_view_t *view);
450 * Freeze view. No changes can be made to view configuration while frozen.
454 *\li 'view' is a valid, unfrozen view.
458 *\li 'view' is frozen.
462 dns_view_thaw(dns_view_t *view);
464 * Thaw view. This allows zones to be added or removed at runtime. This is
465 * NOT thread-safe; the caller MUST have run isc_task_exclusive() prior to
470 *\li 'view' is a valid, frozen view.
474 *\li 'view' is no longer frozen.
477 dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
478 isc_stdtime_t now, unsigned int options, isc_boolean_t use_hints,
479 dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
480 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
482 dns_view_find2(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
483 isc_stdtime_t now, unsigned int options,
484 isc_boolean_t use_hints, isc_boolean_t use_static_stub,
485 dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
486 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
488 * Find an rdataset whose owner name is 'name', and whose type is
490 * In general, this function first searches view's zone and cache DBs for the
491 * best match data against 'name'. If nothing found there, and if 'use_hints'
492 * is ISC_TRUE, the view's hint DB (if configured) is searched.
493 * If the view is configured with a static-stub zone which gives the longest
494 * match for 'name' among the zones, however, the cache DB is not consulted
495 * unless 'use_static_stub' is ISC_FALSE (see below about this argument).
497 * dns_view_find() is a backward compatible version equivalent to
498 * dns_view_find2() with use_static_stub argument being ISC_FALSE.
502 *\li See the description of dns_db_find() for information about 'options'.
503 * If the caller sets #DNS_DBFIND_GLUEOK, it must ensure that 'name'
504 * and 'type' are appropriate for glue retrieval.
506 *\li If 'now' is zero, then the current time will be used.
508 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
509 * it will be searched last. If the answer is found in the hints
510 * database, the result code will be DNS_R_HINT. If the name is found
511 * in the hints database but not the type, the result code will be
512 * #DNS_R_HINTNXRRSET.
514 *\li If 'use_static_stub' is ISC_FALSE and the longest match zone for 'name'
515 * is a static-stub zone, it's ignored and the cache and/or hints will be
516 * searched. In the majority of the cases this argument should be
517 * ISC_FALSE. The only known usage of this argument being ISC_TRUE is
518 * if this search is for a "bailiwick" glue A or AAAA RRset that may
519 * best match a static-stub zone. Consider the following example:
520 * this view is configured with a static-stub zone "example.com",
521 * and an attempt of recursive resolution needs to send a query for the
522 * zone. In this case it's quite likely that the resolver is trying to
523 * find A/AAAA RRs for the apex name "example.com". And, to honor the
524 * static-stub configuration it needs to return the glue RRs in the
525 * static-stub zone even if that exact RRs coming from the authoritative
526 * zone has been cached.
527 * In other general cases, the requested data is better to be
528 * authoritative, either locally configured or retrieved from an external
529 * server, and the data in the static-stub zone should better be ignored.
531 *\li 'foundname' must meet the requirements of dns_db_find().
533 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
534 * covers 'type', then 'sigrdataset' will be bound to it.
538 *\li 'view' is a valid, frozen view.
540 *\li 'name' is valid name.
542 *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type
543 * except dns_rdatatype_any.
545 *\li dbp == NULL || *dbp == NULL
547 *\li nodep == NULL || *nodep == NULL. If nodep != NULL, dbp != NULL.
549 *\li 'foundname' is a valid name with a dedicated buffer or NULL.
551 *\li 'rdataset' is a valid, disassociated rdataset.
553 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
557 *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are
558 * bound to the found data.
560 *\li If dbp != NULL, it points to the database containing the data.
562 *\li If nodep != NULL, it points to the database node containing the data.
564 *\li If foundname != NULL, it contains the full name of the found data.
568 *\li Any result that dns_db_find() can return, with the exception of
573 dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
574 isc_stdtime_t now, unsigned int options,
575 isc_boolean_t use_hints,
576 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
578 * Find an rdataset whose owner name is 'name', and whose type is
583 *\li This routine is appropriate for simple, exact-match queries of the
584 * view. 'name' must be a canonical name; there is no DNAME or CNAME
587 *\li See the description of dns_db_find() for information about 'options'.
588 * If the caller sets DNS_DBFIND_GLUEOK, it must ensure that 'name'
589 * and 'type' are appropriate for glue retrieval.
591 *\li If 'now' is zero, then the current time will be used.
593 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
594 * it will be searched last. If the answer is found in the hints
595 * database, the result code will be DNS_R_HINT. If the name is found
596 * in the hints database but not the type, the result code will be
599 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
600 * covers 'type', then 'sigrdataset' will be bound to it.
604 *\li 'view' is a valid, frozen view.
606 *\li 'name' is valid name.
608 *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type
609 * (e.g. dns_rdatatype_any), or dns_rdatatype_rrsig.
611 *\li 'rdataset' is a valid, disassociated rdataset.
613 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
617 *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are
618 * bound to the found data.
622 *\li #ISC_R_SUCCESS Success; result is desired type.
623 *\li DNS_R_GLUE Success; result is glue.
624 *\li DNS_R_HINT Success; result is a hint.
625 *\li DNS_R_NCACHENXDOMAIN Success; result is a ncache entry.
626 *\li DNS_R_NCACHENXRRSET Success; result is a ncache entry.
627 *\li DNS_R_NXDOMAIN The name does not exist.
628 *\li DNS_R_NXRRSET The rrset does not exist.
629 *\li #ISC_R_NOTFOUND No matching data found,
630 * or an error occurred.
633 /*% See dns_view_findzonecut2() */
635 dns_view_findzonecut(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
636 isc_stdtime_t now, unsigned int options,
637 isc_boolean_t use_hints,
638 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
641 dns_view_findzonecut2(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
642 isc_stdtime_t now, unsigned int options,
643 isc_boolean_t use_hints, isc_boolean_t use_cache,
644 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
646 * Find the best known zonecut containing 'name'.
648 * This uses local authority, cache, and optionally hints data.
649 * No external queries are performed.
653 *\li If 'now' is zero, then the current time will be used.
655 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
656 * it will be searched last.
658 *\li If 'use_cache' is ISC_TRUE, and the view has a cache, then it will be
661 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
662 * covers 'type', then 'sigrdataset' will be bound to it.
664 *\li If the DNS_DBFIND_NOEXACT option is set, then the zonecut returned
665 * (if any) will be the deepest known ancestor of 'name'.
669 *\li 'view' is a valid, frozen view.
671 *\li 'name' is valid name.
673 *\li 'rdataset' is a valid, disassociated rdataset.
675 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
679 *\li #ISC_R_SUCCESS Success.
681 *\li Many other results are possible.
685 dns_viewlist_find(dns_viewlist_t *list, const char *name,
686 dns_rdataclass_t rdclass, dns_view_t **viewp);
688 * Search for a view with name 'name' and class 'rdclass' in 'list'.
689 * If found, '*viewp' is (strongly) attached to it.
693 *\li 'viewp' points to a NULL dns_view_t *.
697 *\li #ISC_R_SUCCESS A matching view was found.
698 *\li #ISC_R_NOTFOUND No matching view was found.
702 dns_viewlist_findzone(dns_viewlist_t *list, dns_name_t *name, isc_boolean_t allclasses,
703 dns_rdataclass_t rdclass, dns_zone_t **zonep);
706 * Search zone with 'name' in view with 'rdclass' in viewlist 'list'
707 * If found, zone is returned in *zonep. If allclasses is set rdclass is ignored
710 *\li #ISC_R_SUCCESS A matching zone was found.
711 *\li #ISC_R_NOTFOUND No matching zone was found.
715 dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep);
717 * Search for the zone 'name' in the zone table of 'view'.
718 * If found, 'zonep' is (strongly) attached to it. There
719 * are no partial matches.
723 *\li 'zonep' points to a NULL dns_zone_t *.
726 *\li #ISC_R_SUCCESS A matching zone was found.
727 *\li #ISC_R_NOTFOUND No matching zone was found.
728 *\li others An error occurred.
732 dns_view_load(dns_view_t *view, isc_boolean_t stop);
735 dns_view_loadnew(dns_view_t *view, isc_boolean_t stop);
738 dns_view_asyncload(dns_view_t *view, dns_zt_allloaded_t callback, void *arg);
740 * Load zones attached to this view. dns_view_load() loads
741 * all zones whose master file has changed since the last
742 * load; dns_view_loadnew() loads only zones that have never
745 * dns_view_asyncload() loads zones asynchronously. When all zones
746 * in the view have finished loading, 'callback' is called with argument
747 * 'arg' to inform the caller.
749 * If 'stop' is ISC_TRUE, stop on the first error and return it.
750 * If 'stop' is ISC_FALSE (or we are loading asynchronously), ignore errors.
754 *\li 'view' is valid.
758 dns_view_gettsig(dns_view_t *view, dns_name_t *keyname,
759 dns_tsigkey_t **keyp);
761 * Find the TSIG key configured in 'view' with name 'keyname',
765 *\li keyp points to a NULL dns_tsigkey_t *.
768 *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it.
769 *\li #ISC_R_NOTFOUND No key was found.
770 *\li others An error occurred.
774 dns_view_getpeertsig(dns_view_t *view, isc_netaddr_t *peeraddr,
775 dns_tsigkey_t **keyp);
777 * Find the TSIG key configured in 'view' for the server whose
778 * address is 'peeraddr', if any.
781 * keyp points to a NULL dns_tsigkey_t *.
784 *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it.
785 *\li #ISC_R_NOTFOUND No key was found.
786 *\li others An error occurred.
790 dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg);
792 * Verifies the signature of a message.
796 *\li 'view' is a valid view.
797 *\li 'source' is a valid buffer containing the message
798 *\li 'msg' is a valid message
801 *\li see dns_tsig_verify()
805 dns_view_dialup(dns_view_t *view);
807 * Perform dialup-time maintenance on the zones of 'view'.
811 dns_view_dumpdbtostream(dns_view_t *view, FILE *fp);
813 * Dump the current state of the view 'view' to the stream 'fp'
814 * for purposes of analysis or debugging.
816 * Currently the dumped state includes the view's cache; in the future
817 * it may also include other state such as the address database.
818 * It will not not include authoritative data since it is voluminous and
819 * easily obtainable by other means.
823 *\li 'view' is valid.
825 *\li 'fp' refers to a file open for writing.
828 * \li ISC_R_SUCCESS The cache was successfully dumped.
829 * \li others An error occurred (see dns_master_dump)
833 dns_view_flushcache(dns_view_t *view);
835 dns_view_flushcache2(dns_view_t *view, isc_boolean_t fixuponly);
837 * Flush the view's cache (and ADB). If 'fixuponly' is true, it only updates
838 * the internal reference to the cache DB with omitting actual flush operation.
839 * 'fixuponly' is intended to be used for a view that shares a cache with
840 * a different view. dns_view_flushcache() is a backward compatible version
841 * that always sets fixuponly to false.
846 * No other tasks are executing.
854 dns_view_flushnode(dns_view_t *view, dns_name_t *name, isc_boolean_t tree);
856 * Flush the given name from the view's cache (and optionally ADB/badcache).
858 * If 'tree' is true, flush 'name' and all names below it
859 * from the cache, but do not flush ADB.
861 * If 'tree' is false, flush 'name' frmo both the cache and ADB,
862 * but do not touch any other nodes.
865 *\li 'view' is valid.
866 *\li 'name' is valid.
870 * other returns are failures.
874 dns_view_flushname(dns_view_t *view, dns_name_t *name);
876 * Flush the given name from the view's cache, ADB and badcache.
877 * Equivalent to dns_view_flushnode(view, name, ISC_FALSE).
881 *\li 'view' is valid.
882 *\li 'name' is valid.
886 * other returns are failures.
890 dns_view_adddelegationonly(dns_view_t *view, dns_name_t *name);
892 * Add the given name to the delegation only table.
895 *\li 'view' is valid.
896 *\li 'name' is valid.
904 dns_view_excludedelegationonly(dns_view_t *view, dns_name_t *name);
906 * Add the given name to be excluded from the root-delegation-only.
910 *\li 'view' is valid.
911 *\li 'name' is valid.
919 dns_view_isdelegationonly(dns_view_t *view, dns_name_t *name);
921 * Check if 'name' is in the delegation only table or if
922 * rootdelonly is set that name is not being excluded.
925 *\li 'view' is valid.
926 *\li 'name' is valid.
929 *\li #ISC_TRUE if the name is the table.
930 *\li #ISC_FALSE otherwise.
934 dns_view_setrootdelonly(dns_view_t *view, isc_boolean_t value);
936 * Set the root delegation only flag.
939 *\li 'view' is valid.
943 dns_view_getrootdelonly(dns_view_t *view);
945 * Get the root delegation only flag.
948 *\li 'view' is valid.
952 dns_view_freezezones(dns_view_t *view, isc_boolean_t freeze);
954 * Freeze/thaw updates to master zones.
957 * \li 'view' is valid.
961 dns_view_setresstats(dns_view_t *view, isc_stats_t *stats);
963 * Set a general resolver statistics counter set 'stats' for 'view'.
966 * \li 'view' is valid and is not frozen.
968 *\li stats is a valid statistics supporting resolver statistics counters
973 dns_view_getresstats(dns_view_t *view, isc_stats_t **statsp);
975 * Get the general statistics counter set for 'view'. If a statistics set is
976 * set '*statsp' will be attached to the set; otherwise, '*statsp' will be
980 * \li 'view' is valid and is not frozen.
982 *\li 'statsp' != NULL && '*statsp' != NULL
986 dns_view_setresquerystats(dns_view_t *view, dns_stats_t *stats);
988 * Set a statistics counter set of rdata type, 'stats', for 'view'. Once the
989 * statistic set is installed, view's resolver will count outgoing queries
993 * \li 'view' is valid and is not frozen.
995 *\li stats is a valid statistics created by dns_rdatatypestats_create().
999 dns_view_getresquerystats(dns_view_t *view, dns_stats_t **statsp);
1001 * Get the rdatatype statistics counter set for 'view'. If a statistics set is
1002 * set '*statsp' will be attached to the set; otherwise, '*statsp' will be
1006 * \li 'view' is valid and is not frozen.
1008 *\li 'statsp' != NULL && '*statsp' != NULL
1012 dns_view_iscacheshared(dns_view_t *view);
1014 * Check if the view shares the cache created by another view.
1017 * \li 'view' is valid.
1020 *\li #ISC_TRUE if the cache is shared.
1021 *\li #ISC_FALSE otherwise.
1025 dns_view_initsecroots(dns_view_t *view, isc_mem_t *mctx);
1027 * Initialize security roots for the view. (Note that secroots is
1028 * NULL until this function is called, so any function using
1029 * secroots must check its validity first. One way to do this is
1030 * use dns_view_getsecroots() and check its return value.)
1033 * \li 'view' is valid.
1034 * \li 'view->secroots' is NULL.
1038 *\li Any other result indicates failure
1042 dns_view_getsecroots(dns_view_t *view, dns_keytable_t **ktp);
1044 * Get the security roots for this view. Returns ISC_R_NOTFOUND if
1045 * the security roots keytable has not been initialized for the view.
1047 * '*ktp' is attached on success; the caller is responsible for
1048 * detaching it with dns_keytable_detach().
1051 * \li 'view' is valid.
1052 * \li 'ktp' is not NULL and '*ktp' is NULL.
1060 dns_view_issecuredomain(dns_view_t *view, dns_name_t *name,
1061 isc_boolean_t *secure_domain);
1063 * Is 'name' at or beneath a trusted key? Put answer in
1067 * \li 'view' is valid.
1071 *\li Any other value indicates failure
1075 dns_view_untrust(dns_view_t *view, dns_name_t *keyname,
1076 dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx);
1078 * Remove keys that match 'keyname' and 'dnskey' from the views trust
1082 * \li 'view' is valid.
1083 * \li 'keyname' is valid.
1084 * \li 'mctx' is valid.
1085 * \li 'dnskey' is valid.
1089 dns_view_setnewzones(dns_view_t *view, isc_boolean_t allow, void *cfgctx,
1090 void (*cfg_destroy)(void **));
1092 * Set whether or not to allow zones to be created or deleted at runtime.
1094 * If 'allow' is ISC_TRUE, determines the filename into which new zone
1095 * configuration will be written. Preserves the configuration context
1096 * (a pointer to which is passed in 'cfgctx') for use when parsing new
1097 * zone configuration. 'cfg_destroy' points to a callback routine to
1098 * destroy the configuration context when the view is destroyed. (This
1099 * roundabout method is used in order to avoid libdns having a dependency
1100 * on libisccfg and libbind9.)
1102 * If 'allow' is ISC_FALSE, removes any existing references to
1103 * configuration context and frees any memory.
1106 * \li 'view' is valid.
1110 dns_view_restorekeyring(dns_view_t *view);
1114 #endif /* DNS_VIEW_H */