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✏️ view.h
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/* * 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_VIEW_H #define DNS_VIEW_H 1 /***** ***** Module Info *****/ /*! \file dns/view.h * \brief * DNS View * * A "view" is a DNS namespace, together with an optional resolver and a * forwarding policy. A "DNS namespace" is a (possibly empty) set of * authoritative zones together with an optional cache and optional * "hints" information. * * Views start out "unfrozen". In this state, core attributes like * the cache, set of zones, and forwarding policy may be set. While * "unfrozen", the caller (e.g. nameserver configuration loading * code), must ensure exclusive access to the view. When the view is * "frozen", the core attributes become immutable, and the view module * will ensure synchronization. Freezing allows the view's core attributes * to be accessed without locking. * * MP: *\li Before the view is frozen, the caller must ensure synchronization. * *\li After the view is frozen, the module guarantees appropriate * synchronization of any data structures it creates and manipulates. * * Reliability: *\li No anticipated impact. * * Resources: *\li TBS * * Security: *\li No anticipated impact. * * Standards: *\li None. */ #include <stdio.h> #include <inttypes.h> #include <stdbool.h> #include <isc/lang.h> #include <isc/magic.h> #include <isc/event.h> #include <isc/mutex.h> #include <isc/net.h> #include <isc/refcount.h> #include <isc/rwlock.h> #include <isc/stdtime.h> #include <dns/acl.h> #include <dns/catz.h> #include <dns/clientinfo.h> #include <dns/dnstap.h> #include <dns/fixedname.h> #include <dns/rrl.h> #include <dns/rdatastruct.h> #include <dns/rpz.h> #include <dns/types.h> #include <dns/zt.h> ISC_LANG_BEGINDECLS struct dns_view { /* Unlocked. */ unsigned int magic; isc_mem_t * mctx; dns_rdataclass_t rdclass; char * name; dns_zt_t * zonetable; dns_resolver_t * resolver; dns_adb_t * adb; dns_requestmgr_t * requestmgr; dns_acache_t * acache; dns_cache_t * cache; dns_db_t * cachedb; dns_db_t * hints; /* * security roots and negative trust anchors. * internal use only; access via * dns_view_getsecroots() */ dns_keytable_t * secroots_priv; dns_ntatable_t * ntatable_priv; isc_mutex_t lock; bool frozen; isc_task_t * task; isc_event_t resevent; isc_event_t adbevent; isc_event_t reqevent; isc_stats_t * adbstats; isc_stats_t * resstats; dns_stats_t * resquerystats; bool cacheshared; /* Configurable data. */ dns_tsig_keyring_t * statickeys; dns_tsig_keyring_t * dynamickeys; dns_peerlist_t * peers; dns_order_t * order; dns_fwdtable_t * fwdtable; bool recursion; bool auth_nxdomain; bool additionalfromcache; bool additionalfromauth; bool minimal_any; dns_minimaltype_t minimalresponses; bool enablednssec; bool enablevalidation; bool acceptexpired; bool requireservercookie; bool trust_anchor_telemetry; bool root_key_sentinel; dns_transfer_format_t transfer_format; dns_acl_t * cacheacl; dns_acl_t * cacheonacl; dns_acl_t * queryacl; dns_acl_t * queryonacl; dns_acl_t * recursionacl; dns_acl_t * recursiononacl; dns_acl_t * sortlist; dns_acl_t * notifyacl; dns_acl_t * transferacl; dns_acl_t * updateacl; dns_acl_t * upfwdacl; dns_acl_t * denyansweracl; dns_acl_t * nocasecompress; bool msgcompression; dns_rbt_t * answeracl_exclude; dns_rbt_t * denyanswernames; dns_rbt_t * answernames_exclude; dns_rrl_t * rrl; bool provideixfr; bool requestnsid; bool sendcookie; dns_ttl_t maxcachettl; dns_ttl_t maxncachettl; uint32_t nta_lifetime; uint32_t nta_recheck; char *nta_file; dns_ttl_t prefetch_trigger; dns_ttl_t prefetch_eligible; in_port_t dstport; dns_aclenv_t aclenv; dns_rdatatype_t preferred_glue; bool flush; dns_namelist_t * delonly; bool rootdelonly; dns_namelist_t * rootexclude; bool checknames; dns_name_t * dlv; dns_fixedname_t dlv_fixed; uint16_t maxudp; uint16_t nocookieudp; unsigned int maxbits; dns_aaaa_t v4_aaaa; dns_aaaa_t v6_aaaa; dns_acl_t * aaaa_acl; dns_dns64list_t dns64; unsigned int dns64cnt; dns_rpz_zones_t *rpzs; dns_catz_zones_t *catzs; dns_dlzdblist_t dlz_searched; dns_dlzdblist_t dlz_unsearched; uint32_t fail_ttl; dns_badcache_t *failcache; /* * Configurable data for server use only, * locked by server configuration lock. */ dns_acl_t * matchclients; dns_acl_t * matchdestinations; bool matchrecursiveonly; /* Locked by themselves. */ isc_refcount_t references; isc_refcount_t weakrefs; /* Locked by lock. */ unsigned int attributes; /* Under owner's locking control. */ ISC_LINK(struct dns_view) link; dns_viewlist_t * viewlist; dns_zone_t * managed_keys; dns_zone_t * redirect; dns_name_t * redirectzone; /* points to * redirectfixed * when valid */ dns_fixedname_t redirectfixed; /* * File and configuration data for zones added at runtime * (only used in BIND9). * * XXX: This should be a pointer to an opaque type that * named implements. */ char * new_zone_file; char * new_zone_db; void * new_zone_dbenv; uint64_t new_zone_mapsize; void * new_zone_config; void (*cfg_destroy)(void **); isc_mutex_t new_zone_lock; unsigned char secret[32]; /* Client secret */ unsigned int v6bias; dns_dtenv_t *dtenv; /* Dnstap environment */ dns_dtmsgtype_t dttypes; /* Dnstap message types to log */ dns_ttl_t staleanswerttl; dns_stale_answer_t staleanswersok; /* rndc setting */ bool staleanswersenable; /* named.conf setting */ }; #define DNS_VIEW_MAGIC ISC_MAGIC('V','i','e','w') #define DNS_VIEW_VALID(view) ISC_MAGIC_VALID(view, DNS_VIEW_MAGIC) #define DNS_VIEWATTR_RESSHUTDOWN 0x01 #define DNS_VIEWATTR_ADBSHUTDOWN 0x02 #define DNS_VIEWATTR_REQSHUTDOWN 0x04 #ifdef HAVE_LMDB #include <lmdb.h> #define DNS_LMDB_COMMON_FLAGS (MDB_CREATE | MDB_NOSUBDIR | MDB_NOLOCK) #ifndef __OpenBSD__ #define DNS_LMDB_FLAGS (DNS_LMDB_COMMON_FLAGS) #else /* __OpenBSD__ */ /* * OpenBSD does not have a unified buffer cache, which requires both reads and * writes to be performed using mmap(). */ #define DNS_LMDB_FLAGS (DNS_LMDB_COMMON_FLAGS | MDB_WRITEMAP) #endif /* __OpenBSD__ */ #endif /* HAVE_LMDB */ isc_result_t dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass, const char *name, dns_view_t **viewp); /*%< * Create a view. * * Notes: * *\li The newly created view has no cache, no resolver, and an empty * zone table. The view is not frozen. * * Requires: * *\li 'mctx' is a valid memory context. * *\li 'rdclass' is a valid class. * *\li 'name' is a valid C string. * *\li viewp != NULL && *viewp == NULL * * Returns: * *\li #ISC_R_SUCCESS *\li #ISC_R_NOMEMORY * *\li Other errors are possible. */ void dns_view_attach(dns_view_t *source, dns_view_t **targetp); /*%< * Attach '*targetp' to 'source'. * * Requires: * *\li 'source' is a valid, frozen view. * *\li 'targetp' points to a NULL dns_view_t *. * * Ensures: * *\li *targetp is attached to source. * *\li While *targetp is attached, the view will not shut down. */ void dns_view_detach(dns_view_t **viewp); /*%< * Detach '*viewp' from its view. * * Requires: * *\li 'viewp' points to a valid dns_view_t * * * Ensures: * *\li *viewp is NULL. */ void dns_view_flushanddetach(dns_view_t **viewp); /*%< * Detach '*viewp' from its view. If this was the last reference * uncommitted changed in zones will be flushed to disk. * * Requires: * *\li 'viewp' points to a valid dns_view_t * * * Ensures: * *\li *viewp is NULL. */ void dns_view_weakattach(dns_view_t *source, dns_view_t **targetp); /*%< * Weakly attach '*targetp' to 'source'. * * Requires: * *\li 'source' is a valid, frozen view. * *\li 'targetp' points to a NULL dns_view_t *. * * Ensures: * *\li *targetp is attached to source. * * \li While *targetp is attached, the view will not be freed. */ void dns_view_weakdetach(dns_view_t **targetp); /*%< * Detach '*viewp' from its view. * * Requires: * *\li 'viewp' points to a valid dns_view_t *. * * Ensures: * *\li *viewp is NULL. */ isc_result_t dns_view_createzonetable(dns_view_t *view); /*%< * Create a zonetable for the view. * * Requires: * *\li 'view' is a valid, unfrozen view. * *\li 'view' does not have a zonetable already. * * Returns: * *\li #ISC_R_SUCCESS * *\li Any error that dns_zt_create() can return. */ isc_result_t dns_view_createresolver(dns_view_t *view, isc_taskmgr_t *taskmgr, unsigned int ntasks, unsigned int ndisp, isc_socketmgr_t *socketmgr, isc_timermgr_t *timermgr, unsigned int options, dns_dispatchmgr_t *dispatchmgr, dns_dispatch_t *dispatchv4, dns_dispatch_t *dispatchv6); /*%< * Create a resolver and address database for the view. * * Requires: * *\li 'view' is a valid, unfrozen view. * *\li 'view' does not have a resolver already. * *\li The requirements of dns_resolver_create() apply to 'taskmgr', * 'ntasks', 'socketmgr', 'timermgr', 'options', 'dispatchv4', and * 'dispatchv6'. * * Returns: * *\li #ISC_R_SUCCESS * *\li Any error that dns_resolver_create() can return. */ void dns_view_setcache(dns_view_t *view, dns_cache_t *cache); void dns_view_setcache2(dns_view_t *view, dns_cache_t *cache, bool shared); /*%< * Set the view's cache database. If 'shared' is true, this means the cache * is created by another view and is shared with that view. dns_view_setcache() * is a backward compatible version equivalent to setcache2(..., false). * * Requires: * *\li 'view' is a valid, unfrozen view. * *\li 'cache' is a valid cache. * * Ensures: * * \li The cache of 'view' is 'cached. * *\li If this is not the first call to dns_view_setcache() for this * view, then previously set cache is detached. */ void dns_view_sethints(dns_view_t *view, dns_db_t *hints); /*%< * Set the view's hints database. * * Requires: * *\li 'view' is a valid, unfrozen view, whose hints database has not been * set. * *\li 'hints' is a valid zone database. * * Ensures: * * \li The hints database of 'view' is 'hints'. */ void dns_view_setkeyring(dns_view_t *view, dns_tsig_keyring_t *ring); void dns_view_setdynamickeyring(dns_view_t *view, dns_tsig_keyring_t *ring); /*%< * Set the view's static TSIG keys * * Requires: * * \li 'view' is a valid, unfrozen view, whose static TSIG keyring has not * been set. * *\li 'ring' is a valid TSIG keyring * * Ensures: * *\li The static TSIG keyring of 'view' is 'ring'. */ void dns_view_getdynamickeyring(dns_view_t *view, dns_tsig_keyring_t **ringp); /*%< * Return the views dynamic keys. * * \li 'view' is a valid, unfrozen view. * \li 'ringp' != NULL && ringp == NULL. */ void dns_view_setdstport(dns_view_t *view, in_port_t dstport); /*%< * Set the view's destination port. This is the port to * which outgoing queries are sent. The default is 53, * the standard DNS port. * * Requires: * *\li 'view' is a valid view. * *\li 'dstport' is a valid TCP/UDP port number. * * Ensures: *\li External name servers will be assumed to be listening * on 'dstport'. For servers whose address has already * obtained obtained at the time of the call, the view may * continue to use the previously set port until the address * times out from the view's address database. */ isc_result_t dns_view_addzone(dns_view_t *view, dns_zone_t *zone); /*%< * Add zone 'zone' to 'view'. * * Requires: * *\li 'view' is a valid, unfrozen view. * *\li 'zone' is a valid zone. */ void dns_view_freeze(dns_view_t *view); /*%< * Freeze view. No changes can be made to view configuration while frozen. * * Requires: * *\li 'view' is a valid, unfrozen view. * * Ensures: * *\li 'view' is frozen. */ void dns_view_thaw(dns_view_t *view); /*%< * Thaw view. This allows zones to be added or removed at runtime. This is * NOT thread-safe; the caller MUST have run isc_task_exclusive() prior to * thawing the view. * * Requires: * *\li 'view' is a valid, frozen view. * * Ensures: * *\li 'view' is no longer frozen. */ isc_result_t dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type, isc_stdtime_t now, unsigned int options, bool use_hints, dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset); isc_result_t dns_view_find2(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type, isc_stdtime_t now, unsigned int options, bool use_hints, bool use_static_stub, dns_db_t **dbp, dns_dbnode_t **nodep, dns_name_t *foundname, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset); /*%< * Find an rdataset whose owner name is 'name', and whose type is * 'type'. * In general, this function first searches view's zone and cache DBs for the * best match data against 'name'. If nothing found there, and if 'use_hints' * is true, the view's hint DB (if configured) is searched. * If the view is configured with a static-stub zone which gives the longest * match for 'name' among the zones, however, the cache DB is not consulted * unless 'use_static_stub' is false (see below about this argument). * * dns_view_find() is a backward compatible version equivalent to * dns_view_find2() with use_static_stub argument being false. * * Notes: * *\li See the description of dns_db_find() for information about 'options'. * If the caller sets #DNS_DBFIND_GLUEOK, it must ensure that 'name' * and 'type' are appropriate for glue retrieval. * *\li If 'now' is zero, then the current time will be used. * *\li If 'use_hints' is true, and the view has a hints database, then * it will be searched last. If the answer is found in the hints * database, the result code will be DNS_R_HINT. If the name is found * in the hints database but not the type, the result code will be * #DNS_R_HINTNXRRSET. * *\li If 'use_static_stub' is false and the longest match zone for 'name' * is a static-stub zone, it's ignored and the cache and/or hints will be * searched. In the majority of the cases this argument should be * false. The only known usage of this argument being true is * if this search is for a "bailiwick" glue A or AAAA RRset that may * best match a static-stub zone. Consider the following example: * this view is configured with a static-stub zone "example.com", * and an attempt of recursive resolution needs to send a query for the * zone. In this case it's quite likely that the resolver is trying to * find A/AAAA RRs for the apex name "example.com". And, to honor the * static-stub configuration it needs to return the glue RRs in the * static-stub zone even if that exact RRs coming from the authoritative * zone has been cached. * In other general cases, the requested data is better to be * authoritative, either locally configured or retrieved from an external * server, and the data in the static-stub zone should better be ignored. * *\li 'foundname' must meet the requirements of dns_db_find(). * *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which * covers 'type', then 'sigrdataset' will be bound to it. * * Requires: * *\li 'view' is a valid, frozen view. * *\li 'name' is valid name. * *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type * except dns_rdatatype_any. * *\li dbp == NULL || *dbp == NULL * *\li nodep == NULL || *nodep == NULL. If nodep != NULL, dbp != NULL. * *\li 'foundname' is a valid name with a dedicated buffer or NULL. * *\li 'rdataset' is a valid, disassociated rdataset. * *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset. * * Ensures: * *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are * bound to the found data. * *\li If dbp != NULL, it points to the database containing the data. * *\li If nodep != NULL, it points to the database node containing the data. * *\li If foundname != NULL, it contains the full name of the found data. * * Returns: * *\li Any result that dns_db_find() can return, with the exception of * #DNS_R_DELEGATION. */ isc_result_t dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type, isc_stdtime_t now, unsigned int options, bool use_hints, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset); /*%< * Find an rdataset whose owner name is 'name', and whose type is * 'type'. * * Notes: * *\li This routine is appropriate for simple, exact-match queries of the * view. 'name' must be a canonical name; there is no DNAME or CNAME * processing. * *\li See the description of dns_db_find() for information about 'options'. * If the caller sets DNS_DBFIND_GLUEOK, it must ensure that 'name' * and 'type' are appropriate for glue retrieval. * *\li If 'now' is zero, then the current time will be used. * *\li If 'use_hints' is true, and the view has a hints database, then * it will be searched last. If the answer is found in the hints * database, the result code will be DNS_R_HINT. If the name is found * in the hints database but not the type, the result code will be * DNS_R_HINTNXRRSET. * *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which * covers 'type', then 'sigrdataset' will be bound to it. * * Requires: * *\li 'view' is a valid, frozen view. * *\li 'name' is valid name. * *\li 'type' is a valid dns_rdatatype_t, and is not a meta query type * (e.g. dns_rdatatype_any), or dns_rdatatype_rrsig. * *\li 'rdataset' is a valid, disassociated rdataset. * *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset. * * Ensures: * *\li In successful cases, 'rdataset', and possibly 'sigrdataset', are * bound to the found data. * * Returns: * *\li #ISC_R_SUCCESS Success; result is desired type. *\li DNS_R_GLUE Success; result is glue. *\li DNS_R_HINT Success; result is a hint. *\li DNS_R_NCACHENXDOMAIN Success; result is a ncache entry. *\li DNS_R_NCACHENXRRSET Success; result is a ncache entry. *\li DNS_R_NXDOMAIN The name does not exist. *\li DNS_R_NXRRSET The rrset does not exist. *\li #ISC_R_NOTFOUND No matching data found, * or an error occurred. */ /*% See dns_view_findzonecut2() */ isc_result_t dns_view_findzonecut(dns_view_t *view, dns_name_t *name, dns_name_t *fname, isc_stdtime_t now, unsigned int options, bool use_hints, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset); isc_result_t dns_view_findzonecut2(dns_view_t *view, dns_name_t *name, dns_name_t *fname, isc_stdtime_t now, unsigned int options, bool use_hints, bool use_cache, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset); /*%< * Find the best known zonecut containing 'name'. * * This uses local authority, cache, and optionally hints data. * No external queries are performed. * * Notes: * *\li If 'now' is zero, then the current time will be used. * *\li If 'use_hints' is true, and the view has a hints database, then * it will be searched last. * *\li If 'use_cache' is true, and the view has a cache, then it will be * searched. * *\li If 'sigrdataset' is not NULL, and there is a SIG rdataset which * covers 'type', then 'sigrdataset' will be bound to it. * *\li If the DNS_DBFIND_NOEXACT option is set, then the zonecut returned * (if any) will be the deepest known ancestor of 'name'. * * Requires: * *\li 'view' is a valid, frozen view. * *\li 'name' is valid name. * *\li 'rdataset' is a valid, disassociated rdataset. * *\li 'sigrdataset' is NULL, or is a valid, disassociated rdataset. * * Returns: * *\li #ISC_R_SUCCESS Success. * *\li Many other results are possible. */ isc_result_t dns_viewlist_find(dns_viewlist_t *list, const char *name, dns_rdataclass_t rdclass, dns_view_t **viewp); /*%< * Search for a view with name 'name' and class 'rdclass' in 'list'. * If found, '*viewp' is (strongly) attached to it. * * Requires: * *\li 'viewp' points to a NULL dns_view_t *. * * Returns: * *\li #ISC_R_SUCCESS A matching view was found. *\li #ISC_R_NOTFOUND No matching view was found. */ isc_result_t dns_viewlist_findzone(dns_viewlist_t *list, dns_name_t *name, bool allclasses, dns_rdataclass_t rdclass, dns_zone_t **zonep); /*%< * Search zone with 'name' in view with 'rdclass' in viewlist 'list' * If found, zone is returned in *zonep. If allclasses is set rdclass is ignored * * Returns: *\li #ISC_R_SUCCESS A matching zone was found. *\li #ISC_R_NOTFOUND No matching zone was found. *\li #ISC_R_MULTIPLE Multiple zones with the same name were found. */ isc_result_t dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep); /*%< * Search for the zone 'name' in the zone table of 'view'. * If found, 'zonep' is (strongly) attached to it. There * are no partial matches. * * Requires: * *\li 'zonep' points to a NULL dns_zone_t *. * * Returns: *\li #ISC_R_SUCCESS A matching zone was found. *\li #ISC_R_NOTFOUND No matching zone was found. *\li others An error occurred. */ isc_result_t dns_view_load(dns_view_t *view, bool stop); isc_result_t dns_view_loadnew(dns_view_t *view, bool stop); isc_result_t dns_view_asyncload(dns_view_t *view, dns_zt_allloaded_t callback, void *arg); isc_result_t dns_view_asyncload2(dns_view_t *view, dns_zt_allloaded_t callback, void *arg, bool newonly); /*%< * Load zones attached to this view. dns_view_load() loads * all zones whose master file has changed since the last * load; dns_view_loadnew() loads only zones that have never * been loaded. * * dns_view_asyncload() loads zones asynchronously. When all zones * in the view have finished loading, 'callback' is called with argument * 'arg' to inform the caller. * * If 'stop' is true, stop on the first error and return it. * If 'stop' is false (or we are loading asynchronously), ignore errors. * * Requires: * *\li 'view' is valid. */ isc_result_t dns_view_gettsig(dns_view_t *view, dns_name_t *keyname, dns_tsigkey_t **keyp); /*%< * Find the TSIG key configured in 'view' with name 'keyname', * if any. * * Requires: *\li keyp points to a NULL dns_tsigkey_t *. * * Returns: *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it. *\li #ISC_R_NOTFOUND No key was found. *\li others An error occurred. */ isc_result_t dns_view_getpeertsig(dns_view_t *view, isc_netaddr_t *peeraddr, dns_tsigkey_t **keyp); /*%< * Find the TSIG key configured in 'view' for the server whose * address is 'peeraddr', if any. * * Requires: * keyp points to a NULL dns_tsigkey_t *. * * Returns: *\li #ISC_R_SUCCESS A key was found and '*keyp' now points to it. *\li #ISC_R_NOTFOUND No key was found. *\li others An error occurred. */ isc_result_t dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg); /*%< * Verifies the signature of a message. * * Requires: * *\li 'view' is a valid view. *\li 'source' is a valid buffer containing the message *\li 'msg' is a valid message * * Returns: *\li see dns_tsig_verify() */ void dns_view_dialup(dns_view_t *view); /*%< * Perform dialup-time maintenance on the zones of 'view'. */ isc_result_t dns_view_dumpdbtostream(dns_view_t *view, FILE *fp); /*%< * Dump the current state of the view 'view' to the stream 'fp' * for purposes of analysis or debugging. * * Currently the dumped state includes the view's cache; in the future * it may also include other state such as the address database. * It will not not include authoritative data since it is voluminous and * easily obtainable by other means. * * Requires: * *\li 'view' is valid. * *\li 'fp' refers to a file open for writing. * * Returns: * \li ISC_R_SUCCESS The cache was successfully dumped. * \li others An error occurred (see dns_master_dump) */ isc_result_t dns_view_flushcache(dns_view_t *view); isc_result_t dns_view_flushcache2(dns_view_t *view, bool fixuponly); /*%< * Flush the view's cache (and ADB). If 'fixuponly' is true, it only updates * the internal reference to the cache DB with omitting actual flush operation. * 'fixuponly' is intended to be used for a view that shares a cache with * a different view. dns_view_flushcache() is a backward compatible version * that always sets fixuponly to false. * * Requires: * 'view' is valid. * * No other tasks are executing. * * Returns: *\li #ISC_R_SUCCESS *\li #ISC_R_NOMEMORY */ isc_result_t dns_view_flushnode(dns_view_t *view, dns_name_t *name, bool tree); /*%< * Flush the given name from the view's cache (and optionally ADB/badcache). * * Flush the given name from the cache, ADB, and bad cache. If 'tree' * is true, also flush all subdomains of 'name'. * * Requires: *\li 'view' is valid. *\li 'name' is valid. * * Returns: *\li #ISC_R_SUCCESS * other returns are failures. */ isc_result_t dns_view_flushname(dns_view_t *view, dns_name_t *name); /*%< * Flush the given name from the view's cache, ADB and badcache. * Equivalent to dns_view_flushnode(view, name, false). * * * Requires: *\li 'view' is valid. *\li 'name' is valid. * * Returns: *\li #ISC_R_SUCCESS * other returns are failures. */ isc_result_t dns_view_adddelegationonly(dns_view_t *view, dns_name_t *name); /*%< * Add the given name to the delegation only table. * * Requires: *\li 'view' is valid. *\li 'name' is valid. * * Returns: *\li #ISC_R_SUCCESS *\li #ISC_R_NOMEMORY */ isc_result_t dns_view_excludedelegationonly(dns_view_t *view, dns_name_t *name); /*%< * Add the given name to be excluded from the root-delegation-only. * * * Requires: *\li 'view' is valid. *\li 'name' is valid. * * Returns: *\li #ISC_R_SUCCESS *\li #ISC_R_NOMEMORY */ bool dns_view_isdelegationonly(dns_view_t *view, dns_name_t *name); /*%< * Check if 'name' is in the delegation only table or if * rootdelonly is set that name is not being excluded. * * Requires: *\li 'view' is valid. *\li 'name' is valid. * * Returns: *\li #true if the name is the table. *\li #false otherwise. */ void dns_view_setrootdelonly(dns_view_t *view, bool value); /*%< * Set the root delegation only flag. * * Requires: *\li 'view' is valid. */ bool dns_view_getrootdelonly(dns_view_t *view); /*%< * Get the root delegation only flag. * * Requires: *\li 'view' is valid. */ isc_result_t dns_view_freezezones(dns_view_t *view, bool freeze); /*%< * Freeze/thaw updates to master zones. * * Requires: * \li 'view' is valid. */ void dns_view_setadbstats(dns_view_t *view, isc_stats_t *stats); /*%< * Set a adb statistics set 'stats' for 'view'. * * Requires: * \li 'view' is valid and is not frozen. * *\li stats is a valid statistics supporting adb statistics * (see dns/stats.h). */ void dns_view_getadbstats(dns_view_t *view, isc_stats_t **statsp); /*%< * Get the adb statistics counter set for 'view'. If a statistics set is * set '*statsp' will be attached to the set; otherwise, '*statsp' will be * untouched. * * Requires: * \li 'view' is valid and is not frozen. * *\li 'statsp' != NULL && '*statsp' != NULL */ void dns_view_setresstats(dns_view_t *view, isc_stats_t *stats); /*%< * Set a general resolver statistics counter set 'stats' for 'view'. * * Requires: * \li 'view' is valid and is not frozen. * *\li stats is a valid statistics supporting resolver statistics counters * (see dns/stats.h). */ void dns_view_getresstats(dns_view_t *view, isc_stats_t **statsp); /*%< * Get the general statistics counter set for 'view'. If a statistics set is * set '*statsp' will be attached to the set; otherwise, '*statsp' will be * untouched. * * Requires: * \li 'view' is valid and is not frozen. * *\li 'statsp' != NULL && '*statsp' != NULL */ void dns_view_setresquerystats(dns_view_t *view, dns_stats_t *stats); /*%< * Set a statistics counter set of rdata type, 'stats', for 'view'. Once the * statistic set is installed, view's resolver will count outgoing queries * per rdata type. * * Requires: * \li 'view' is valid and is not frozen. * *\li stats is a valid statistics created by dns_rdatatypestats_create(). */ void dns_view_getresquerystats(dns_view_t *view, dns_stats_t **statsp); /*%< * Get the rdatatype statistics counter set for 'view'. If a statistics set is * set '*statsp' will be attached to the set; otherwise, '*statsp' will be * untouched. * * Requires: * \li 'view' is valid and is not frozen. * *\li 'statsp' != NULL && '*statsp' != NULL */ bool dns_view_iscacheshared(dns_view_t *view); /*%< * Check if the view shares the cache created by another view. * * Requires: * \li 'view' is valid. * * Returns: *\li #true if the cache is shared. *\li #false otherwise. */ isc_result_t dns_view_initntatable(dns_view_t *view, isc_taskmgr_t *taskmgr, isc_timermgr_t *timermgr); /*%< * Initialize the negative trust anchor table for the view. * * Requires: * \li 'view' is valid. * * Returns: *\li ISC_R_SUCCESS *\li Any other result indicates failure */ isc_result_t dns_view_getntatable(dns_view_t *view, dns_ntatable_t **ntp); /*%< * Get the negative trust anchor table for this view. Returns * ISC_R_NOTFOUND if the table not been initialized for the view. * * '*ntp' is attached on success; the caller is responsible for * detaching it with dns_ntatable_detach(). * * Requires: * \li 'view' is valid. * \li 'nta' is not NULL and '*nta' is NULL. * * Returns: *\li ISC_R_SUCCESS *\li ISC_R_NOTFOUND */ isc_result_t dns_view_initsecroots(dns_view_t *view, isc_mem_t *mctx); /*%< * Initialize security roots for the view, detaching any previously * existing security roots first. (Note that secroots_priv is * NULL until this function is called, so any function using * security roots must check that they have been initialized first. * One way to do this is use dns_view_getsecroots() and check its * return value.) * * Requires: * \li 'view' is valid. * * Returns: *\li ISC_R_SUCCESS *\li Any other result indicates failure */ isc_result_t dns_view_getsecroots(dns_view_t *view, dns_keytable_t **ktp); /*%< * Get the security roots for this view. Returns ISC_R_NOTFOUND if * the security roots keytable has not been initialized for the view. * * '*ktp' is attached on success; the caller is responsible for * detaching it with dns_keytable_detach(). * * Requires: * \li 'view' is valid. * \li 'ktp' is not NULL and '*ktp' is NULL. * * Returns: *\li ISC_R_SUCCESS *\li ISC_R_NOTFOUND */ isc_result_t dns_view_issecuredomain(dns_view_t *view, dns_name_t *name, isc_stdtime_t now, bool checknta, bool *ntap, bool *secure_domain); /*%< * Is 'name' at or beneath a trusted key, and not covered by a valid * negative trust anchor? Put answer in '*secure_domain'. * * If 'checknta' is false, ignore the NTA table in determining * whether this is a secure domain. If 'checknta' is not false, and if * 'ntap' is non-NULL, then '*ntap' will be updated with true if the * name is covered by an NTA. * * Requires: * \li 'view' is valid. * * Returns: *\li ISC_R_SUCCESS *\li Any other value indicates failure */ bool dns_view_ntacovers(dns_view_t *view, isc_stdtime_t now, dns_name_t *name, dns_name_t *anchor); /*%< * Is there a current negative trust anchor above 'name' and below 'anchor'? * * Requires: * \li 'view' is valid. * * Returns: *\li ISC_R_TRUE *\li ISC_R_FALSE */ void dns_view_untrust(dns_view_t *view, dns_name_t *keyname, dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx); /*%< * Remove keys that match 'keyname' and 'dnskey' from the views trust * anchors. * * (NOTE: If the configuration specifies that there should be a * trust anchor at 'keyname', but no keys are left after this * operation, that is an error. We fail closed, inserting a NULL * key so as to prevent validation until a legimitate key has been * provided.) * * Requires: * \li 'view' is valid. * \li 'keyname' is valid. * \li 'mctx' is valid. * \li 'dnskey' is valid. */ isc_result_t dns_view_setnewzones(dns_view_t *view, bool allow, void *cfgctx, void (*cfg_destroy)(void **), uint64_t mapsize); /*%< * Set whether or not to allow zones to be created or deleted at runtime. * * If 'allow' is true, determines the filename into which new zone * configuration will be written. Preserves the configuration context * (a pointer to which is passed in 'cfgctx') for use when parsing new * zone configuration. 'cfg_destroy' points to a callback routine to * destroy the configuration context when the view is destroyed. (This * roundabout method is used in order to avoid libdns having a dependency * on libisccfg and libbind9.) * * If 'allow' is false, removes any existing references to * configuration context and frees any memory. * * Requires: * \li 'view' is valid. * * Returns: * \li ISC_R_SUCCESS * \li ISC_R_NOSPACE */ void dns_view_restorekeyring(dns_view_t *view); isc_result_t dns_view_searchdlz(dns_view_t *view, dns_name_t *name, unsigned int minlabels, dns_clientinfomethods_t *methods, dns_clientinfo_t *clientinfo, dns_db_t **dbp); /*%< * Search through the DLZ database(s) in view->dlz_searched to find * one that can answer a query for 'name', using the DLZ driver's * findzone method. If successful, '*dbp' is set to point to the * DLZ database. * * Returns: * \li ISC_R_SUCCESS * \li ISC_R_NOTFOUND * * Requires: * \li 'view' is valid. * \li 'name' is not NULL. * \li 'dbp' is not NULL and *dbp is NULL. */ uint32_t dns_view_getfailttl(dns_view_t *view); /*%< * Get the view's servfail-ttl. zero => no servfail caching. * * Requires: *\li 'view' to be valid. */ void dns_view_setfailttl(dns_view_t *view, uint32_t failttl); /*%< * Set the view's servfail-ttl. zero => no servfail caching. * * Requires: *\li 'view' to be valid. */ isc_result_t dns_view_saventa(dns_view_t *view); /*%< * Save NTA for names in this view to a file. * * Requires: *\li 'view' to be valid. */ isc_result_t dns_view_loadnta(dns_view_t *view); /*%< * Loads NTA for names in this view from a file. * * Requires: *\li 'view' to be valid. */ void dns_view_setviewcommit(dns_view_t *view); /*%< * Commit dns_zone_setview() calls previously made for all zones in this * view. * * Requires: *\li 'view' to be valid. */ void dns_view_setviewrevert(dns_view_t *view); /*%< * Revert dns_zone_setview() calls previously made for all zones in this * view. * * Requires: *\li 'view' to be valid. */ ISC_LANG_ENDDECLS #endif /* DNS_VIEW_H */
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