2 * Copyright (C) 2004-2012 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>
86 dns_rdataclass_t rdclass;
89 dns_dlzdb_t * dlzdatabase;
90 dns_resolver_t * resolver;
92 dns_requestmgr_t * requestmgr;
93 dns_acache_t * acache;
100 * internal use only; access via * dns_view_getsecroots()
102 dns_keytable_t * secroots_priv;
105 isc_boolean_t frozen;
107 isc_event_t resevent;
108 isc_event_t adbevent;
109 isc_event_t reqevent;
110 isc_stats_t * resstats;
111 dns_stats_t * resquerystats;
112 isc_boolean_t cacheshared;
114 /* Configurable data. */
115 dns_tsig_keyring_t * statickeys;
116 dns_tsig_keyring_t * dynamickeys;
117 dns_peerlist_t * peers;
119 dns_fwdtable_t * fwdtable;
120 isc_boolean_t recursion;
121 isc_boolean_t auth_nxdomain;
122 isc_boolean_t additionalfromcache;
123 isc_boolean_t additionalfromauth;
124 isc_boolean_t minimalresponses;
125 isc_boolean_t enablednssec;
126 isc_boolean_t enablevalidation;
127 isc_boolean_t acceptexpired;
128 dns_transfer_format_t transfer_format;
129 dns_acl_t * cacheacl;
130 dns_acl_t * cacheonacl;
131 dns_acl_t * queryacl;
132 dns_acl_t * queryonacl;
133 dns_acl_t * recursionacl;
134 dns_acl_t * recursiononacl;
135 dns_acl_t * sortlist;
136 dns_acl_t * notifyacl;
137 dns_acl_t * transferacl;
138 dns_acl_t * updateacl;
139 dns_acl_t * upfwdacl;
140 dns_acl_t * denyansweracl;
141 dns_rbt_t * answeracl_exclude;
142 dns_rbt_t * denyanswernames;
143 dns_rbt_t * answernames_exclude;
144 isc_boolean_t requestixfr;
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 dns_v4_aaaa_t v4_aaaa;
161 dns_acl_t * v4_aaaa_acl;
162 dns_dns64list_t dns64;
163 unsigned int dns64cnt;
164 ISC_LIST(dns_rpz_zone_t) rpz_zones;
165 isc_boolean_t rpz_recursive_only;
166 isc_boolean_t rpz_break_dnssec;
169 * Configurable data for server use only,
170 * locked by server configuration lock.
172 dns_acl_t * matchclients;
173 dns_acl_t * matchdestinations;
174 isc_boolean_t matchrecursiveonly;
176 /* Locked by themselves. */
177 isc_refcount_t references;
179 /* Locked by lock. */
180 unsigned int weakrefs;
181 unsigned int attributes;
182 /* Under owner's locking control. */
183 ISC_LINK(struct dns_view) link;
184 dns_viewlist_t * viewlist;
186 dns_zone_t * managed_keys;
189 /* File in which to store configuration for newly added zones */
190 char * new_zone_file;
192 void * new_zone_config;
193 void (*cfg_destroy)(void **);
197 #define DNS_VIEW_MAGIC ISC_MAGIC('V','i','e','w')
198 #define DNS_VIEW_VALID(view) ISC_MAGIC_VALID(view, DNS_VIEW_MAGIC)
200 #define DNS_VIEWATTR_RESSHUTDOWN 0x01
201 #define DNS_VIEWATTR_ADBSHUTDOWN 0x02
202 #define DNS_VIEWATTR_REQSHUTDOWN 0x04
205 dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
206 const char *name, dns_view_t **viewp);
212 *\li The newly created view has no cache, no resolver, and an empty
213 * zone table. The view is not frozen.
217 *\li 'mctx' is a valid memory context.
219 *\li 'rdclass' is a valid class.
221 *\li 'name' is a valid C string.
223 *\li viewp != NULL && *viewp == NULL
230 *\li Other errors are possible.
234 dns_view_attach(dns_view_t *source, dns_view_t **targetp);
236 * Attach '*targetp' to 'source'.
240 *\li 'source' is a valid, frozen view.
242 *\li 'targetp' points to a NULL dns_view_t *.
246 *\li *targetp is attached to source.
248 *\li While *targetp is attached, the view will not shut down.
252 dns_view_detach(dns_view_t **viewp);
254 * Detach '*viewp' from its view.
258 *\li 'viewp' points to a valid dns_view_t *
266 dns_view_flushanddetach(dns_view_t **viewp);
268 * Detach '*viewp' from its view. If this was the last reference
269 * uncommitted changed in zones will be flushed to disk.
273 *\li 'viewp' points to a valid dns_view_t *
281 dns_view_weakattach(dns_view_t *source, dns_view_t **targetp);
283 * Weakly attach '*targetp' to 'source'.
287 *\li 'source' is a valid, frozen view.
289 *\li 'targetp' points to a NULL dns_view_t *.
293 *\li *targetp is attached to source.
295 * \li While *targetp is attached, the view will not be freed.
299 dns_view_weakdetach(dns_view_t **targetp);
301 * Detach '*viewp' from its view.
305 *\li 'viewp' points to a valid dns_view_t *.
313 dns_view_createresolver(dns_view_t *view,
314 isc_taskmgr_t *taskmgr, unsigned int ntasks,
315 isc_socketmgr_t *socketmgr,
316 isc_timermgr_t *timermgr,
317 unsigned int options,
318 dns_dispatchmgr_t *dispatchmgr,
319 dns_dispatch_t *dispatchv4,
320 dns_dispatch_t *dispatchv6);
322 * Create a resolver and address database for the view.
326 *\li 'view' is a valid, unfrozen view.
328 *\li 'view' does not have a resolver already.
330 *\li The requirements of dns_resolver_create() apply to 'taskmgr',
331 * 'ntasks', 'socketmgr', 'timermgr', 'options', 'dispatchv4', and
338 *\li Any error that dns_resolver_create() can return.
342 dns_view_setcache(dns_view_t *view, dns_cache_t *cache);
344 dns_view_setcache2(dns_view_t *view, dns_cache_t *cache, isc_boolean_t shared);
346 * Set the view's cache database. If 'shared' is true, this means the cache
347 * is created by another view and is shared with that view. dns_view_setcache()
348 * is a backward compatible version equivalent to setcache2(..., ISC_FALSE).
352 *\li 'view' is a valid, unfrozen view.
354 *\li 'cache' is a valid cache.
358 * \li The cache of 'view' is 'cached.
360 *\li If this is not the first call to dns_view_setcache() for this
361 * view, then previously set cache is detached.
365 dns_view_sethints(dns_view_t *view, dns_db_t *hints);
367 * Set the view's hints database.
371 *\li 'view' is a valid, unfrozen view, whose hints database has not been
374 *\li 'hints' is a valid zone database.
378 * \li The hints database of 'view' is 'hints'.
382 dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring);
384 dns_view_setdynamickeyring(dns_view_t *view, dns_tsig_keyring_t *ring);
386 * Set the view's static TSIG keys
390 * \li 'view' is a valid, unfrozen view, whose static TSIG keyring has not
393 *\li 'ring' is a valid TSIG keyring
397 *\li The static TSIG keyring of 'view' is 'ring'.
401 dns_view_getdynamickeyring(dns_view_t *view, dns_tsig_keyring_t **ringp);
403 * Return the views dynamic keys.
405 * \li 'view' is a valid, unfrozen view.
406 * \li 'ringp' != NULL && ringp == NULL.
410 dns_view_setdstport(dns_view_t *view, in_port_t dstport);
412 * Set the view's destination port. This is the port to
413 * which outgoing queries are sent. The default is 53,
414 * the standard DNS port.
418 *\li 'view' is a valid view.
420 *\li 'dstport' is a valid TCP/UDP port number.
423 *\li External name servers will be assumed to be listening
424 * on 'dstport'. For servers whose address has already
425 * obtained obtained at the time of the call, the view may
426 * continue to use the previously set port until the address
427 * times out from the view's address database.
432 dns_view_addzone(dns_view_t *view, dns_zone_t *zone);
434 * Add zone 'zone' to 'view'.
438 *\li 'view' is a valid, unfrozen view.
440 *\li 'zone' is a valid zone.
444 dns_view_freeze(dns_view_t *view);
446 * Freeze view. No changes can be made to view configuration while frozen.
450 *\li 'view' is a valid, unfrozen view.
454 *\li 'view' is frozen.
458 dns_view_thaw(dns_view_t *view);
460 * Thaw view. This allows zones to be added or removed at runtime. This is
461 * NOT thread-safe; the caller MUST have run isc_task_exclusive() prior to
466 *\li 'view' is a valid, frozen view.
470 *\li 'view' is no longer frozen.
473 dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
474 isc_stdtime_t now, unsigned int options, isc_boolean_t use_hints,
475 dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
476 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
478 dns_view_find2(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
479 isc_stdtime_t now, unsigned int options,
480 isc_boolean_t use_hints, isc_boolean_t use_static_stub,
481 dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname,
482 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
484 * Find an rdataset whose owner name is 'name', and whose type is
486 * In general, this function first searches view's zone and cache DBs for the
487 * best match data against 'name'. If nothing found there, and if 'use_hints'
488 * is ISC_TRUE, the view's hint DB (if configured) is searched.
489 * If the view is configured with a static-stub zone which gives the longest
490 * match for 'name' among the zones, however, the cache DB is not consulted
491 * unless 'use_static_stub' is ISC_FALSE (see below about this argument).
493 * dns_view_find() is a backward compatible version equivalent to
494 * dns_view_find2() with use_static_stub argument being ISC_FALSE.
498 *\li See the description of dns_db_find() for information about 'options'.
499 * If the caller sets #DNS_DBFIND_GLUEOK, it must ensure that 'name'
500 * and 'type' are appropriate for glue retrieval.
502 *\li If 'now' is zero, then the current time will be used.
504 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
505 * it will be searched last. If the answer is found in the hints
506 * database, the result code will be DNS_R_HINT. If the name is found
507 * in the hints database but not the type, the result code will be
508 * #DNS_R_HINTNXRRSET.
510 *\li If 'use_static_stub' is ISC_FALSE and the longest match zone for 'name'
511 * is a static-stub zone, it's ignored and the cache and/or hints will be
512 * searched. In the majority of the cases this argument should be
513 * ISC_FALSE. The only known usage of this argument being ISC_TRUE is
514 * if this search is for a "bailiwick" glue A or AAAA RRset that may
515 * best match a static-stub zone. Consider the following example:
516 * this view is configured with a static-stub zone "example.com",
517 * and an attempt of recursive resolution needs to send a query for the
518 * zone. In this case it's quite likely that the resolver is trying to
519 * find A/AAAA RRs for the apex name "example.com". And, to honor the
520 * static-stub configuration it needs to return the glue RRs in the
521 * static-stub zone even if that exact RRs coming from the authoritative
522 * zone has been cached.
523 * In other general cases, the requested data is better to be
524 * authoritative, either locally configured or retrieved from an external
525 * server, and the data in the static-stub zone should better be ignored.
527 *\li 'foundname' must meet the requirements of dns_db_find().
529 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
530 * covers 'type', then 'sigrdataset' will be bound to it.
534 *\li 'view' is a valid, frozen view.
536 *\li 'name' is valid name.
538 *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type
539 * except dns_rdatatype_any.
541 *\li dbp == NULL || *dbp == NULL
543 *\li nodep == NULL || *nodep == NULL. If nodep != NULL, dbp != NULL.
545 *\li 'foundname' is a valid name with a dedicated buffer or NULL.
547 *\li 'rdataset' is a valid, disassociated rdataset.
549 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
553 *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are
554 * bound to the found data.
556 *\li If dbp != NULL, it points to the database containing the data.
558 *\li If nodep != NULL, it points to the database node containing the data.
560 *\li If foundname != NULL, it contains the full name of the found data.
564 *\li Any result that dns_db_find() can return, with the exception of
569 dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
570 isc_stdtime_t now, unsigned int options,
571 isc_boolean_t use_hints,
572 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
574 * Find an rdataset whose owner name is 'name', and whose type is
579 *\li This routine is appropriate for simple, exact-match queries of the
580 * view. 'name' must be a canonical name; there is no DNAME or CNAME
583 *\li See the description of dns_db_find() for information about 'options'.
584 * If the caller sets DNS_DBFIND_GLUEOK, it must ensure that 'name'
585 * and 'type' are appropriate for glue retrieval.
587 *\li If 'now' is zero, then the current time will be used.
589 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
590 * it will be searched last. If the answer is found in the hints
591 * database, the result code will be DNS_R_HINT. If the name is found
592 * in the hints database but not the type, the result code will be
595 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
596 * covers 'type', then 'sigrdataset' will be bound to it.
600 *\li 'view' is a valid, frozen view.
602 *\li 'name' is valid name.
604 *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type
605 * (e.g. dns_rdatatype_any), or dns_rdatatype_rrsig.
607 *\li 'rdataset' is a valid, disassociated rdataset.
609 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
613 *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are
614 * bound to the found data.
618 *\li #ISC_R_SUCCESS Success; result is desired type.
619 *\li DNS_R_GLUE Success; result is glue.
620 *\li DNS_R_HINT Success; result is a hint.
621 *\li DNS_R_NCACHENXDOMAIN Success; result is a ncache entry.
622 *\li DNS_R_NCACHENXRRSET Success; result is a ncache entry.
623 *\li DNS_R_NXDOMAIN The name does not exist.
624 *\li DNS_R_NXRRSET The rrset does not exist.
625 *\li #ISC_R_NOTFOUND No matching data found,
626 * or an error occurred.
629 /*% See dns_view_findzonecut2() */
631 dns_view_findzonecut(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
632 isc_stdtime_t now, unsigned int options,
633 isc_boolean_t use_hints,
634 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
637 dns_view_findzonecut2(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
638 isc_stdtime_t now, unsigned int options,
639 isc_boolean_t use_hints, isc_boolean_t use_cache,
640 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
642 * Find the best known zonecut containing 'name'.
644 * This uses local authority, cache, and optionally hints data.
645 * No external queries are performed.
649 *\li If 'now' is zero, then the current time will be used.
651 *\li If 'use_hints' is ISC_TRUE, and the view has a hints database, then
652 * it will be searched last.
654 *\li If 'use_cache' is ISC_TRUE, and the view has a cache, then it will be
657 *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which
658 * covers 'type', then 'sigrdataset' will be bound to it.
660 *\li If the DNS_DBFIND_NOEXACT option is set, then the zonecut returned
661 * (if any) will be the deepest known ancestor of 'name'.
665 *\li 'view' is a valid, frozen view.
667 *\li 'name' is valid name.
669 *\li 'rdataset' is a valid, disassociated rdataset.
671 *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
675 *\li #ISC_R_SUCCESS Success.
677 *\li Many other results are possible.
681 dns_viewlist_find(dns_viewlist_t *list, const char *name,
682 dns_rdataclass_t rdclass, dns_view_t **viewp);
684 * Search for a view with name 'name' and class 'rdclass' in 'list'.
685 * If found, '*viewp' is (strongly) attached to it.
689 *\li 'viewp' points to a NULL dns_view_t *.
693 *\li #ISC_R_SUCCESS A matching view was found.
694 *\li #ISC_R_NOTFOUND No matching view was found.
698 dns_viewlist_findzone(dns_viewlist_t *list, dns_name_t *name, isc_boolean_t allclasses,
699 dns_rdataclass_t rdclass, dns_zone_t **zonep);
702 * Search zone with 'name' in view with 'rdclass' in viewlist 'list'
703 * If found, zone is returned in *zonep. If allclasses is set rdclass is ignored
706 *\li #ISC_R_SUCCESS A matching zone was found.
707 *\li #ISC_R_NOTFOUND No matching zone was found.
711 dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep);
713 * Search for the zone 'name' in the zone table of 'view'.
714 * If found, 'zonep' is (strongly) attached to it. There
715 * are no partial matches.
719 *\li 'zonep' points to a NULL dns_zone_t *.
722 *\li #ISC_R_SUCCESS A matching zone was found.
723 *\li #ISC_R_NOTFOUND No matching zone was found.
724 *\li others An error occurred.
728 dns_view_load(dns_view_t *view, isc_boolean_t stop);
731 dns_view_loadnew(dns_view_t *view, isc_boolean_t stop);
733 * Load zones attached to this view. dns_view_load() loads
734 * all zones whose master file has changed since the last
735 * load; dns_view_loadnew() loads only zones that have never
738 * If 'stop' is ISC_TRUE, stop on the first error and return it.
739 * If 'stop' is ISC_FALSE, ignore errors.
743 *\li 'view' is valid.
747 dns_view_gettsig(dns_view_t *view, dns_name_t *keyname,
748 dns_tsigkey_t **keyp);
750 * Find the TSIG key configured in 'view' with name 'keyname',
754 *\li keyp points to a NULL dns_tsigkey_t *.
757 *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it.
758 *\li #ISC_R_NOTFOUND No key was found.
759 *\li others An error occurred.
763 dns_view_getpeertsig(dns_view_t *view, isc_netaddr_t *peeraddr,
764 dns_tsigkey_t **keyp);
766 * Find the TSIG key configured in 'view' for the server whose
767 * address is 'peeraddr', if any.
770 * keyp points to a NULL dns_tsigkey_t *.
773 *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it.
774 *\li #ISC_R_NOTFOUND No key was found.
775 *\li others An error occurred.
779 dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg);
781 * Verifies the signature of a message.
785 *\li 'view' is a valid view.
786 *\li 'source' is a valid buffer containing the message
787 *\li 'msg' is a valid message
790 *\li see dns_tsig_verify()
794 dns_view_dialup(dns_view_t *view);
796 * Perform dialup-time maintenance on the zones of 'view'.
800 dns_view_dumpdbtostream(dns_view_t *view, FILE *fp);
802 * Dump the current state of the view 'view' to the stream 'fp'
803 * for purposes of analysis or debugging.
805 * Currently the dumped state includes the view's cache; in the future
806 * it may also include other state such as the address database.
807 * It will not not include authoritative data since it is voluminous and
808 * easily obtainable by other means.
812 *\li 'view' is valid.
814 *\li 'fp' refers to a file open for writing.
817 * \li ISC_R_SUCCESS The cache was successfully dumped.
818 * \li others An error occurred (see dns_master_dump)
822 dns_view_flushcache(dns_view_t *view);
824 dns_view_flushcache2(dns_view_t *view, isc_boolean_t fixuponly);
826 * Flush the view's cache (and ADB). If 'fixuponly' is true, it only updates
827 * the internal reference to the cache DB with omitting actual flush operation.
828 * 'fixuponly' is intended to be used for a view that shares a cache with
829 * a different view. dns_view_flushcache() is a backward compatible version
830 * that always sets fixuponly to false.
835 * No other tasks are executing.
843 dns_view_flushname(dns_view_t *view, dns_name_t *);
845 * Flush the given name from the view's cache (and ADB).
848 *\li 'view' is valid.
849 *\li 'name' is valid.
853 * other returns are failures.
857 dns_view_adddelegationonly(dns_view_t *view, dns_name_t *name);
859 * Add the given name to the delegation only table.
863 *\li 'view' is valid.
864 *\li 'name' is valid.
872 dns_view_excludedelegationonly(dns_view_t *view, dns_name_t *name);
874 * Add the given name to be excluded from the root-delegation-only.
878 *\li 'view' is valid.
879 *\li 'name' is valid.
887 dns_view_isdelegationonly(dns_view_t *view, dns_name_t *name);
889 * Check if 'name' is in the delegation only table or if
890 * rootdelonly is set that name is not being excluded.
893 *\li 'view' is valid.
894 *\li 'name' is valid.
897 *\li #ISC_TRUE if the name is the table.
898 *\li #ISC_FALSE otherwise.
902 dns_view_setrootdelonly(dns_view_t *view, isc_boolean_t value);
904 * Set the root delegation only flag.
907 *\li 'view' is valid.
911 dns_view_getrootdelonly(dns_view_t *view);
913 * Get the root delegation only flag.
916 *\li 'view' is valid.
920 dns_view_freezezones(dns_view_t *view, isc_boolean_t freeze);
922 * Freeze/thaw updates to master zones.
925 * \li 'view' is valid.
929 dns_view_setresstats(dns_view_t *view, isc_stats_t *stats);
931 * Set a general resolver statistics counter set 'stats' for 'view'.
934 * \li 'view' is valid and is not frozen.
936 *\li stats is a valid statistics supporting resolver statistics counters
941 dns_view_getresstats(dns_view_t *view, isc_stats_t **statsp);
943 * Get the general statistics counter set for 'view'. If a statistics set is
944 * set '*statsp' will be attached to the set; otherwise, '*statsp' will be
948 * \li 'view' is valid and is not frozen.
950 *\li 'statsp' != NULL && '*statsp' != NULL
954 dns_view_setresquerystats(dns_view_t *view, dns_stats_t *stats);
956 * Set a statistics counter set of rdata type, 'stats', for 'view'. Once the
957 * statistic set is installed, view's resolver will count outgoing queries
961 * \li 'view' is valid and is not frozen.
963 *\li stats is a valid statistics created by dns_rdatatypestats_create().
967 dns_view_getresquerystats(dns_view_t *view, dns_stats_t **statsp);
969 * Get the rdatatype statistics counter set for 'view'. If a statistics set is
970 * set '*statsp' will be attached to the set; otherwise, '*statsp' will be
974 * \li 'view' is valid and is not frozen.
976 *\li 'statsp' != NULL && '*statsp' != NULL
980 dns_view_iscacheshared(dns_view_t *view);
982 * Check if the view shares the cache created by another view.
985 * \li 'view' is valid.
988 *\li #ISC_TRUE if the cache is shared.
989 *\li #ISC_FALSE otherwise.
993 dns_view_initsecroots(dns_view_t *view, isc_mem_t *mctx);
995 * Initialize security roots for the view. (Note that secroots is
996 * NULL until this function is called, so any function using
997 * secroots must check its validity first. One way to do this is
998 * use dns_view_getsecroots() and check its return value.)
1001 * \li 'view' is valid.
1002 * \li 'view->secroots' is NULL.
1006 *\li Any other result indicates failure
1010 dns_view_getsecroots(dns_view_t *view, dns_keytable_t **ktp);
1012 * Get the security roots for this view. Returns ISC_R_NOTFOUND if
1013 * the security roots keytable has not been initialized for the view.
1015 * '*ktp' is attached on success; the caller is responsible for
1016 * detaching it with dns_keytable_detach().
1019 * \li 'view' is valid.
1020 * \li 'ktp' is not NULL and '*ktp' is NULL.
1028 dns_view_issecuredomain(dns_view_t *view, dns_name_t *name,
1029 isc_boolean_t *secure_domain);
1031 * Is 'name' at or beneath a trusted key? Put answer in
1035 * \li 'view' is valid.
1039 *\li Any other value indicates failure
1043 dns_view_untrust(dns_view_t *view, dns_name_t *keyname,
1044 dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx);
1046 * Remove keys that match 'keyname' and 'dnskey' from the views trust
1050 * \li 'view' is valid.
1051 * \li 'keyname' is valid.
1052 * \li 'mctx' is valid.
1053 * \li 'dnskey' is valid.
1057 dns_view_setnewzones(dns_view_t *view, isc_boolean_t allow, void *cfgctx,
1058 void (*cfg_destroy)(void **));
1060 * Set whether or not to allow zones to be created or deleted at runtime.
1062 * If 'allow' is ISC_TRUE, determines the filename into which new zone
1063 * configuration will be written. Preserves the configuration context
1064 * (a pointer to which is passed in 'cfgctx') for use when parsing new
1065 * zone configuration. 'cfg_destroy' points to a callback routine to
1066 * destroy the configuration context when the view is destroyed. (This
1067 * roundabout method is used in order to avoid libdns having a dependency
1068 * on libisccfg and libbind9.)
1070 * If 'allow' is ISC_FALSE, removes any existing references to
1071 * configuration context and frees any memory.
1074 * \li 'view' is valid.
1078 dns_view_restorekeyring(dns_view_t *view);
1082 #endif /* DNS_VIEW_H */