/* $NetBSD: view.c,v 1.19 2025/07/17 19:01:45 christos Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * 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. */ /*! \file */ #include #include #include #ifdef HAVE_LMDB #include #endif /* ifdef HAVE_LMDB */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CHECK(op) \ do { \ result = (op); \ if (result != ISC_R_SUCCESS) \ goto cleanup; \ } while (0) #define DNS_VIEW_DELONLYHASH 111 /*% * Default maximum number of chained queries before we give up * to prevent CNAME loops. */ #define DEFAULT_MAX_RESTARTS 11 /*% * Default EDNS0 buffer size */ #define DEFAULT_EDNS_BUFSIZE 1232 isc_result_t dns_view_create(isc_mem_t *mctx, isc_loopmgr_t *loopmgr, dns_dispatchmgr_t *dispatchmgr, dns_rdataclass_t rdclass, const char *name, dns_view_t **viewp) { dns_view_t *view = NULL; isc_result_t result; char buffer[1024]; REQUIRE(name != NULL); REQUIRE(viewp != NULL && *viewp == NULL); result = isc_file_sanitize(NULL, name, "nta", buffer, sizeof(buffer)); if (result != ISC_R_SUCCESS) { return result; } view = isc_mem_get(mctx, sizeof(*view)); *view = (dns_view_t){ .rdclass = rdclass, .name = isc_mem_strdup(mctx, name), .nta_file = isc_mem_strdup(mctx, buffer), .recursion = true, .enablevalidation = true, .minimalresponses = dns_minimal_no, .transfer_format = dns_one_answer, .msgcompression = true, .provideixfr = true, .maxcachettl = 7 * 24 * 3600, .maxncachettl = 3 * 3600, .dstport = 53, .staleanswerttl = 1, .staleanswersok = dns_stale_answer_conf, .sendcookie = true, .synthfromdnssec = true, .trust_anchor_telemetry = true, .root_key_sentinel = true, .udpsize = DEFAULT_EDNS_BUFSIZE, .max_restarts = DEFAULT_MAX_RESTARTS, }; isc_refcount_init(&view->references, 1); isc_refcount_init(&view->weakrefs, 1); dns_fixedname_init(&view->redirectfixed); ISC_LIST_INIT(view->dlz_searched); ISC_LIST_INIT(view->dlz_unsearched); ISC_LIST_INIT(view->dns64); ISC_LINK_INIT(view, link); isc_mem_attach(mctx, &view->mctx); if (dispatchmgr != NULL) { dns_dispatchmgr_attach(dispatchmgr, &view->dispatchmgr); } isc_mutex_init(&view->lock); dns_zt_create(mctx, view, &view->zonetable); dns_fwdtable_create(mctx, view, &view->fwdtable); dns_tsigkeyring_create(view->mctx, &view->dynamickeys); view->failcache = dns_badcache_new(view->mctx, loopmgr); isc_mutex_init(&view->new_zone_lock); result = dns_order_create(view->mctx, &view->order); if (result != ISC_R_SUCCESS) { goto cleanup_new_zone_lock; } result = dns_peerlist_new(view->mctx, &view->peers); if (result != ISC_R_SUCCESS) { goto cleanup_order; } dns_aclenv_create(view->mctx, &view->aclenv); dns_nametree_create(view->mctx, DNS_NAMETREE_COUNT, "sfd", &view->sfd); view->magic = DNS_VIEW_MAGIC; *viewp = view; return ISC_R_SUCCESS; cleanup_order: if (view->order != NULL) { dns_order_detach(&view->order); } cleanup_new_zone_lock: isc_mutex_destroy(&view->new_zone_lock); dns_badcache_destroy(&view->failcache); if (view->dynamickeys != NULL) { dns_tsigkeyring_detach(&view->dynamickeys); } isc_refcount_decrementz(&view->weakrefs); isc_refcount_destroy(&view->weakrefs); isc_refcount_decrementz(&view->references); isc_refcount_destroy(&view->references); dns_fwdtable_destroy(&view->fwdtable); dns_zt_detach(&view->zonetable); isc_mutex_destroy(&view->lock); if (view->nta_file != NULL) { isc_mem_free(mctx, view->nta_file); } isc_mem_free(mctx, view->name); isc_mem_putanddetach(&view->mctx, view, sizeof(*view)); return result; } static void destroy(dns_view_t *view) { dns_dns64_t *dns64; dns_dlzdb_t *dlzdb; REQUIRE(!ISC_LINK_LINKED(view, link)); isc_refcount_destroy(&view->references); isc_refcount_destroy(&view->weakrefs); if (view->order != NULL) { dns_order_detach(&view->order); } if (view->peers != NULL) { dns_peerlist_detach(&view->peers); } if (view->dynamickeys != NULL) { isc_result_t result; char template[PATH_MAX]; char keyfile[PATH_MAX]; FILE *fp = NULL; result = isc_file_mktemplate(NULL, template, sizeof(template)); if (result == ISC_R_SUCCESS) { (void)isc_file_openuniqueprivate(template, &fp); } if (fp != NULL) { result = dns_tsigkeyring_dump(view->dynamickeys, fp); if (result == ISC_R_SUCCESS) { if (fclose(fp) == 0) { result = isc_file_sanitize( NULL, view->name, "tsigkeys", keyfile, sizeof(keyfile)); if (result == ISC_R_SUCCESS) { result = isc_file_rename( template, keyfile); } } if (result != ISC_R_SUCCESS) { (void)remove(template); } } else { (void)fclose(fp); (void)remove(template); } } dns_tsigkeyring_detach(&view->dynamickeys); } if (view->transports != NULL) { dns_transport_list_detach(&view->transports); } if (view->statickeys != NULL) { dns_tsigkeyring_detach(&view->statickeys); } /* These must have been detached in dns_view_detach() */ INSIST(view->adb == NULL); INSIST(view->resolver == NULL); INSIST(view->requestmgr == NULL); dns_rrl_view_destroy(view); if (view->rpzs != NULL) { dns_rpz_zones_shutdown(view->rpzs); dns_rpz_zones_detach(&view->rpzs); } if (view->catzs != NULL) { dns_catz_zones_shutdown(view->catzs); dns_catz_zones_detach(&view->catzs); } for (dlzdb = ISC_LIST_HEAD(view->dlz_searched); dlzdb != NULL; dlzdb = ISC_LIST_HEAD(view->dlz_searched)) { ISC_LIST_UNLINK(view->dlz_searched, dlzdb, link); dns_dlzdestroy(&dlzdb); } for (dlzdb = ISC_LIST_HEAD(view->dlz_unsearched); dlzdb != NULL; dlzdb = ISC_LIST_HEAD(view->dlz_unsearched)) { ISC_LIST_UNLINK(view->dlz_unsearched, dlzdb, link); dns_dlzdestroy(&dlzdb); } if (view->hints != NULL) { dns_db_detach(&view->hints); } if (view->cachedb != NULL) { dns_db_detach(&view->cachedb); } if (view->cache != NULL) { dns_cache_detach(&view->cache); } if (view->nocasecompress != NULL) { dns_acl_detach(&view->nocasecompress); } if (view->matchclients != NULL) { dns_acl_detach(&view->matchclients); } if (view->matchdestinations != NULL) { dns_acl_detach(&view->matchdestinations); } if (view->cacheacl != NULL) { dns_acl_detach(&view->cacheacl); } if (view->cacheonacl != NULL) { dns_acl_detach(&view->cacheonacl); } if (view->queryacl != NULL) { dns_acl_detach(&view->queryacl); } if (view->queryonacl != NULL) { dns_acl_detach(&view->queryonacl); } if (view->recursionacl != NULL) { dns_acl_detach(&view->recursionacl); } if (view->recursiononacl != NULL) { dns_acl_detach(&view->recursiononacl); } if (view->sortlist != NULL) { dns_acl_detach(&view->sortlist); } if (view->transferacl != NULL) { dns_acl_detach(&view->transferacl); } if (view->notifyacl != NULL) { dns_acl_detach(&view->notifyacl); } if (view->updateacl != NULL) { dns_acl_detach(&view->updateacl); } if (view->upfwdacl != NULL) { dns_acl_detach(&view->upfwdacl); } if (view->denyansweracl != NULL) { dns_acl_detach(&view->denyansweracl); } if (view->pad_acl != NULL) { dns_acl_detach(&view->pad_acl); } if (view->proxyacl != NULL) { dns_acl_detach(&view->proxyacl); } if (view->proxyonacl != NULL) { dns_acl_detach(&view->proxyonacl); } if (view->answeracl_exclude != NULL) { dns_nametree_detach(&view->answeracl_exclude); } if (view->denyanswernames != NULL) { dns_nametree_detach(&view->denyanswernames); } if (view->answernames_exclude != NULL) { dns_nametree_detach(&view->answernames_exclude); } if (view->sfd != NULL) { dns_nametree_detach(&view->sfd); } if (view->secroots_priv != NULL) { dns_keytable_detach(&view->secroots_priv); } if (view->ntatable_priv != NULL) { dns_ntatable_detach(&view->ntatable_priv); } for (dns64 = ISC_LIST_HEAD(view->dns64); dns64 != NULL; dns64 = ISC_LIST_HEAD(view->dns64)) { dns_dns64_unlink(&view->dns64, dns64); dns_dns64_destroy(&dns64); } if (view->managed_keys != NULL) { dns_zone_detach(&view->managed_keys); } if (view->redirect != NULL) { dns_zone_detach(&view->redirect); } #ifdef HAVE_DNSTAP if (view->dtenv != NULL) { dns_dt_detach(&view->dtenv); } #endif /* HAVE_DNSTAP */ dns_view_setnewzones(view, false, NULL, NULL, 0ULL); if (view->new_zone_file != NULL) { isc_mem_free(view->mctx, view->new_zone_file); view->new_zone_file = NULL; } if (view->new_zone_dir != NULL) { isc_mem_free(view->mctx, view->new_zone_dir); view->new_zone_dir = NULL; } #ifdef HAVE_LMDB if (view->new_zone_dbenv != NULL) { mdb_env_close((MDB_env *)view->new_zone_dbenv); view->new_zone_dbenv = NULL; } if (view->new_zone_db != NULL) { isc_mem_free(view->mctx, view->new_zone_db); view->new_zone_db = NULL; } #endif /* HAVE_LMDB */ dns_fwdtable_destroy(&view->fwdtable); dns_aclenv_detach(&view->aclenv); if (view->failcache != NULL) { dns_badcache_destroy(&view->failcache); } isc_mutex_destroy(&view->new_zone_lock); isc_mutex_destroy(&view->lock); isc_refcount_destroy(&view->references); isc_refcount_destroy(&view->weakrefs); isc_mem_free(view->mctx, view->nta_file); isc_mem_free(view->mctx, view->name); if (view->hooktable != NULL && view->hooktable_free != NULL) { view->hooktable_free(view->mctx, &view->hooktable); } if (view->plugins != NULL && view->plugins_free != NULL) { view->plugins_free(view->mctx, &view->plugins); } isc_mem_putanddetach(&view->mctx, view, sizeof(*view)); } void dns_view_attach(dns_view_t *source, dns_view_t **targetp) { REQUIRE(DNS_VIEW_VALID(source)); REQUIRE(targetp != NULL && *targetp == NULL); isc_refcount_increment(&source->references); *targetp = source; } void dns_view_detach(dns_view_t **viewp) { dns_view_t *view = NULL; REQUIRE(viewp != NULL && DNS_VIEW_VALID(*viewp)); view = *viewp; *viewp = NULL; if (isc_refcount_decrement(&view->references) == 1) { dns_zone_t *mkzone = NULL, *rdzone = NULL; dns_zt_t *zonetable = NULL; dns_resolver_t *resolver = NULL; dns_adb_t *adb = NULL; dns_requestmgr_t *requestmgr = NULL; dns_dispatchmgr_t *dispatchmgr = NULL; isc_refcount_destroy(&view->references); /* Shutdown the attached objects first */ if (view->resolver != NULL) { dns_resolver_shutdown(view->resolver); } rcu_read_lock(); adb = rcu_dereference(view->adb); if (adb != NULL) { dns_adb_shutdown(adb); } rcu_read_unlock(); if (view->requestmgr != NULL) { dns_requestmgr_shutdown(view->requestmgr); } /* Swap the pointers under the lock */ LOCK(&view->lock); if (view->resolver != NULL) { resolver = view->resolver; view->resolver = NULL; } rcu_read_lock(); zonetable = rcu_xchg_pointer(&view->zonetable, NULL); if (zonetable != NULL) { if (view->flush) { dns_zt_flush(zonetable); } } adb = rcu_xchg_pointer(&view->adb, NULL); dispatchmgr = rcu_xchg_pointer(&view->dispatchmgr, NULL); rcu_read_unlock(); if (view->requestmgr != NULL) { requestmgr = view->requestmgr; view->requestmgr = NULL; } if (view->managed_keys != NULL) { mkzone = view->managed_keys; view->managed_keys = NULL; if (view->flush) { dns_zone_flush(mkzone); } } if (view->redirect != NULL) { rdzone = view->redirect; view->redirect = NULL; if (view->flush) { dns_zone_flush(rdzone); } } if (view->catzs != NULL) { dns_catz_zones_shutdown(view->catzs); dns_catz_zones_detach(&view->catzs); } if (view->ntatable_priv != NULL) { dns_ntatable_shutdown(view->ntatable_priv); } UNLOCK(&view->lock); /* Detach outside view lock */ if (resolver != NULL) { dns_resolver_detach(&resolver); } synchronize_rcu(); if (dispatchmgr != NULL) { dns_dispatchmgr_detach(&dispatchmgr); } if (adb != NULL) { dns_adb_detach(&adb); } if (zonetable != NULL) { dns_zt_detach(&zonetable); } if (requestmgr != NULL) { dns_requestmgr_detach(&requestmgr); } if (mkzone != NULL) { dns_zone_detach(&mkzone); } if (rdzone != NULL) { dns_zone_detach(&rdzone); } dns_view_weakdetach(&view); } } static isc_result_t dialup(dns_zone_t *zone, void *dummy) { UNUSED(dummy); dns_zone_dialup(zone); return ISC_R_SUCCESS; } void dns_view_dialup(dns_view_t *view) { dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { (void)dns_zt_apply(zonetable, false, NULL, dialup, NULL); } rcu_read_unlock(); } void dns_view_weakattach(dns_view_t *source, dns_view_t **targetp) { REQUIRE(DNS_VIEW_VALID(source)); REQUIRE(targetp != NULL && *targetp == NULL); isc_refcount_increment(&source->weakrefs); *targetp = source; } void dns_view_weakdetach(dns_view_t **viewp) { dns_view_t *view = NULL; REQUIRE(viewp != NULL); view = *viewp; *viewp = NULL; REQUIRE(DNS_VIEW_VALID(view)); if (isc_refcount_decrement(&view->weakrefs) == 1) { destroy(view); } } isc_result_t dns_view_createresolver(dns_view_t *view, isc_nm_t *netmgr, unsigned int options, isc_tlsctx_cache_t *tlsctx_cache, dns_dispatch_t *dispatchv4, dns_dispatch_t *dispatchv6) { isc_result_t result; isc_mem_t *mctx = NULL; isc_loopmgr_t *loopmgr = isc_loop_getloopmgr(isc_loop()); REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(!view->frozen); REQUIRE(view->resolver == NULL); REQUIRE(view->dispatchmgr != NULL); result = dns_resolver_create(view, loopmgr, netmgr, options, tlsctx_cache, dispatchv4, dispatchv6, &view->resolver); if (result != ISC_R_SUCCESS) { return result; } isc_mem_create(&mctx); isc_mem_setname(mctx, "ADB"); dns_adb_create(mctx, view, &view->adb); isc_mem_detach(&mctx); result = dns_requestmgr_create(view->mctx, loopmgr, view->dispatchmgr, dispatchv4, dispatchv6, &view->requestmgr); if (result != ISC_R_SUCCESS) { goto cleanup_adb; } return ISC_R_SUCCESS; cleanup_adb: dns_adb_shutdown(view->adb); dns_adb_detach(&view->adb); dns_resolver_shutdown(view->resolver); dns_resolver_detach(&view->resolver); return result; } void dns_view_setcache(dns_view_t *view, dns_cache_t *cache, bool shared) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(!view->frozen); view->cacheshared = shared; if (view->cache != NULL) { dns_db_detach(&view->cachedb); dns_cache_detach(&view->cache); } dns_cache_attach(cache, &view->cache); dns_cache_attachdb(cache, &view->cachedb); INSIST(DNS_DB_VALID(view->cachedb)); dns_cache_setmaxrrperset(view->cache, view->maxrrperset); dns_cache_setmaxtypepername(view->cache, view->maxtypepername); } bool dns_view_iscacheshared(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); return view->cacheshared; } void dns_view_sethints(dns_view_t *view, dns_db_t *hints) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(!view->frozen); REQUIRE(view->hints == NULL); REQUIRE(dns_db_iszone(hints)); dns_db_attach(hints, &view->hints); } void dns_view_settransports(dns_view_t *view, dns_transport_list_t *list) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(list != NULL); if (view->transports != NULL) { dns_transport_list_detach(&view->transports); } dns_transport_list_attach(list, &view->transports); } void dns_view_setkeyring(dns_view_t *view, dns_tsigkeyring_t *ring) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(ring != NULL); if (view->statickeys != NULL) { dns_tsigkeyring_detach(&view->statickeys); } dns_tsigkeyring_attach(ring, &view->statickeys); } void dns_view_setdynamickeyring(dns_view_t *view, dns_tsigkeyring_t *ring) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(ring != NULL); if (view->dynamickeys != NULL) { dns_tsigkeyring_detach(&view->dynamickeys); } dns_tsigkeyring_attach(ring, &view->dynamickeys); } void dns_view_getdynamickeyring(dns_view_t *view, dns_tsigkeyring_t **ringp) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(ringp != NULL && *ringp == NULL); if (view->dynamickeys != NULL) { dns_tsigkeyring_attach(view->dynamickeys, ringp); } } void dns_view_restorekeyring(dns_view_t *view) { FILE *fp; char keyfile[PATH_MAX]; isc_result_t result; REQUIRE(DNS_VIEW_VALID(view)); if (view->dynamickeys != NULL) { result = isc_file_sanitize(NULL, view->name, "tsigkeys", keyfile, sizeof(keyfile)); if (result == ISC_R_SUCCESS) { fp = fopen(keyfile, "r"); if (fp != NULL) { dns_tsigkeyring_restore(view->dynamickeys, fp); (void)fclose(fp); } } } } void dns_view_setdstport(dns_view_t *view, in_port_t dstport) { REQUIRE(DNS_VIEW_VALID(view)); view->dstport = dstport; } void dns_view_freeze(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(!view->frozen); if (view->resolver != NULL) { INSIST(view->cachedb != NULL); dns_resolver_freeze(view->resolver); } view->frozen = true; } void dns_view_thaw(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(view->frozen); view->frozen = false; } isc_result_t dns_view_addzone(dns_view_t *view, dns_zone_t *zone) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(!view->frozen); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_mount(zonetable, zone); } else { result = ISC_R_SHUTTINGDOWN; } rcu_read_unlock(); return result; } isc_result_t dns_view_delzone(dns_view_t *view, dns_zone_t *zone) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); dns_zone_prepare_shutdown(zone); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_unmount(zonetable, zone); } else { result = ISC_R_SUCCESS; } rcu_read_unlock(); return result; } isc_result_t dns_view_findzone(dns_view_t *view, const dns_name_t *name, unsigned int options, dns_zone_t **zonep) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_find(zonetable, name, options, zonep); } else { result = ISC_R_NOTFOUND; } rcu_read_unlock(); return result; } isc_result_t dns_view_find(dns_view_t *view, const 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) { isc_result_t result; dns_db_t *db = NULL, *zdb = NULL; dns_dbnode_t *node = NULL, *znode = NULL; bool is_cache, is_staticstub_zone; dns_rdataset_t zrdataset, zsigrdataset; dns_zone_t *zone = NULL; dns_zt_t *zonetable = NULL; /* * Find an rdataset whose owner name is 'name', and whose type is * 'type'. */ REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(view->frozen); REQUIRE(type != dns_rdatatype_rrsig); REQUIRE(rdataset != NULL); /* XXXBEW - remove this */ REQUIRE(nodep == NULL || *nodep == NULL); /* * Initialize. */ dns_rdataset_init(&zrdataset); dns_rdataset_init(&zsigrdataset); /* * Find a database to answer the query. */ is_staticstub_zone = false; rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_find(zonetable, name, DNS_ZTFIND_MIRROR, &zone); } else { result = ISC_R_SHUTTINGDOWN; } rcu_read_unlock(); if (zone != NULL && dns_zone_gettype(zone) == dns_zone_staticstub && !use_static_stub) { result = ISC_R_NOTFOUND; } if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) { result = dns_zone_getdb(zone, &db); if (result != ISC_R_SUCCESS && view->cachedb != NULL) { dns_db_attach(view->cachedb, &db); } else if (result != ISC_R_SUCCESS) { goto cleanup; } if (dns_zone_gettype(zone) == dns_zone_staticstub && dns_name_equal(name, dns_zone_getorigin(zone))) { is_staticstub_zone = true; } } else if (result == ISC_R_NOTFOUND && view->cachedb != NULL) { dns_db_attach(view->cachedb, &db); } else { goto cleanup; } is_cache = dns_db_iscache(db); db_find: /* * Now look for an answer in the database. */ result = dns_db_find(db, name, NULL, type, options, now, &node, foundname, rdataset, sigrdataset); if (result == DNS_R_DELEGATION || result == ISC_R_NOTFOUND) { if (dns_rdataset_isassociated(rdataset)) { dns_rdataset_disassociate(rdataset); } if (sigrdataset != NULL && dns_rdataset_isassociated(sigrdataset)) { dns_rdataset_disassociate(sigrdataset); } if (node != NULL) { dns_db_detachnode(db, &node); } if (!is_cache) { dns_db_detach(&db); if (view->cachedb != NULL && !is_staticstub_zone) { /* * Either the answer is in the cache, or we * don't know it. * Note that if the result comes from a * static-stub zone we stop the search here * (see the function description in view.h). */ is_cache = true; dns_db_attach(view->cachedb, &db); goto db_find; } } else { /* * We don't have the data in the cache. If we've got * glue from the zone, use it. */ if (dns_rdataset_isassociated(&zrdataset)) { dns_rdataset_clone(&zrdataset, rdataset); if (sigrdataset != NULL && dns_rdataset_isassociated(&zsigrdataset)) { dns_rdataset_clone(&zsigrdataset, sigrdataset); } result = DNS_R_GLUE; if (db != NULL) { dns_db_detach(&db); } dns_db_attach(zdb, &db); dns_db_attachnode(db, znode, &node); goto cleanup; } } /* * We don't know the answer. */ result = ISC_R_NOTFOUND; } else if (result == DNS_R_GLUE) { /* * Glue is the answer wanted. */ result = ISC_R_SUCCESS; } if (result == ISC_R_NOTFOUND && !is_staticstub_zone && use_hints && view->hints != NULL) { if (dns_rdataset_isassociated(rdataset)) { dns_rdataset_disassociate(rdataset); } if (sigrdataset != NULL && dns_rdataset_isassociated(sigrdataset)) { dns_rdataset_disassociate(sigrdataset); } if (db != NULL) { if (node != NULL) { dns_db_detachnode(db, &node); } dns_db_detach(&db); } result = dns_db_find(view->hints, name, NULL, type, options, now, &node, foundname, rdataset, sigrdataset); if (result == ISC_R_SUCCESS || result == DNS_R_GLUE) { /* * We just used a hint. Let the resolver know it * should consider priming. */ dns_resolver_t *res = NULL; result = dns_view_getresolver(view, &res); if (result == ISC_R_SUCCESS) { dns_resolver_prime(res); dns_db_attach(view->hints, &db); dns_resolver_detach(&res); result = DNS_R_HINT; } } else if (result == DNS_R_NXRRSET) { dns_db_attach(view->hints, &db); result = DNS_R_HINTNXRRSET; } else if (result == DNS_R_NXDOMAIN) { result = ISC_R_NOTFOUND; } /* * Cleanup if non-standard hints are used. */ if (db == NULL && node != NULL) { dns_db_detachnode(view->hints, &node); } } cleanup: if (dns_rdataset_isassociated(&zrdataset)) { dns_rdataset_disassociate(&zrdataset); if (dns_rdataset_isassociated(&zsigrdataset)) { dns_rdataset_disassociate(&zsigrdataset); } } if (zdb != NULL) { if (znode != NULL) { dns_db_detachnode(zdb, &znode); } dns_db_detach(&zdb); } if (db != NULL) { if (node != NULL) { if (nodep != NULL) { *nodep = node; } else { dns_db_detachnode(db, &node); } } if (dbp != NULL) { *dbp = db; } else { dns_db_detach(&db); } } else { INSIST(node == NULL); } if (zone != NULL) { dns_zone_detach(&zone); } return result; } isc_result_t dns_view_simplefind(dns_view_t *view, const 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) { isc_result_t result; dns_fixedname_t foundname; dns_fixedname_init(&foundname); result = dns_view_find(view, name, type, now, options, use_hints, false, NULL, NULL, dns_fixedname_name(&foundname), rdataset, sigrdataset); if (result == DNS_R_NXDOMAIN) { /* * The rdataset and sigrdataset of the relevant NSEC record * may be returned, but the caller cannot use them because * foundname is not returned by this simplified API. We * disassociate them here to prevent any misuse by the caller. */ if (dns_rdataset_isassociated(rdataset)) { dns_rdataset_disassociate(rdataset); } if (sigrdataset != NULL && dns_rdataset_isassociated(sigrdataset)) { dns_rdataset_disassociate(sigrdataset); } } else if (result != ISC_R_SUCCESS && result != DNS_R_GLUE && result != DNS_R_HINT && result != DNS_R_NCACHENXDOMAIN && result != DNS_R_NCACHENXRRSET && result != DNS_R_NXRRSET && result != DNS_R_HINTNXRRSET && result != ISC_R_NOTFOUND) { if (dns_rdataset_isassociated(rdataset)) { dns_rdataset_disassociate(rdataset); } if (sigrdataset != NULL && dns_rdataset_isassociated(sigrdataset)) { dns_rdataset_disassociate(sigrdataset); } result = ISC_R_NOTFOUND; } return result; } isc_result_t dns_view_findzonecut(dns_view_t *view, const dns_name_t *name, dns_name_t *fname, dns_name_t *dcname, isc_stdtime_t now, unsigned int options, bool use_hints, bool use_cache, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) { isc_result_t result; dns_db_t *db = NULL; bool is_cache, use_zone = false, try_hints = false; dns_zone_t *zone = NULL; dns_name_t *zfname = NULL; dns_zt_t *zonetable = NULL; dns_rdataset_t zrdataset, zsigrdataset; dns_fixedname_t zfixedname; unsigned int ztoptions = DNS_ZTFIND_MIRROR; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(view->frozen); /* * Initialize. */ dns_fixedname_init(&zfixedname); dns_rdataset_init(&zrdataset); dns_rdataset_init(&zsigrdataset); /* * Find the right database. */ if ((options & DNS_DBFIND_NOEXACT) != 0) { ztoptions |= DNS_ZTFIND_NOEXACT; } rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_find(zonetable, name, ztoptions, &zone); } else { result = ISC_R_SHUTTINGDOWN; } rcu_read_unlock(); if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) { result = dns_zone_getdb(zone, &db); } if (result == ISC_R_NOTFOUND) { /* * We're not directly authoritative for this query name, nor * is it a subdomain of any zone for which we're * authoritative. */ if (use_cache && view->cachedb != NULL) { /* * We have a cache; try it. */ dns_db_attach(view->cachedb, &db); } else if (use_hints && view->hints != NULL) { /* * Maybe we have hints... */ try_hints = true; goto finish; } else { result = DNS_R_NXDOMAIN; goto cleanup; } } else if (result != ISC_R_SUCCESS) { /* * Something is broken. */ goto cleanup; } is_cache = dns_db_iscache(db); db_find: /* * Look for the zonecut. */ if (!is_cache) { result = dns_db_find(db, name, NULL, dns_rdatatype_ns, options, now, NULL, fname, rdataset, sigrdataset); if (result == DNS_R_DELEGATION) { result = ISC_R_SUCCESS; } else if (result != ISC_R_SUCCESS) { goto cleanup; } /* * Tag static stub NS RRset so that when we look for * addresses we use the configured server addresses. */ if (dns_zone_gettype(zone) == dns_zone_staticstub) { rdataset->attributes |= DNS_RDATASETATTR_STATICSTUB; } if (use_cache && view->cachedb != NULL && db != view->hints) { /* * We found an answer, but the cache may be better. */ zfname = dns_fixedname_name(&zfixedname); dns_name_copy(fname, zfname); dns_rdataset_clone(rdataset, &zrdataset); dns_rdataset_disassociate(rdataset); if (sigrdataset != NULL && dns_rdataset_isassociated(sigrdataset)) { dns_rdataset_clone(sigrdataset, &zsigrdataset); dns_rdataset_disassociate(sigrdataset); } dns_db_detach(&db); dns_db_attach(view->cachedb, &db); is_cache = true; goto db_find; } } else { result = dns_db_findzonecut(db, name, options, now, NULL, fname, dcname, rdataset, sigrdataset); if (result == ISC_R_SUCCESS) { if (zfname != NULL && (!dns_name_issubdomain(fname, zfname) || (dns_zone_gettype(zone) == dns_zone_staticstub && dns_name_equal(fname, zfname)))) { /* * We found a zonecut in the cache, but our * zone delegation is better. */ use_zone = true; } } else if (result == ISC_R_NOTFOUND) { if (zfname != NULL) { /* * We didn't find anything in the cache, but we * have a zone delegation, so use it. */ use_zone = true; result = ISC_R_SUCCESS; } else if (use_hints && view->hints != NULL) { /* * Maybe we have hints... */ try_hints = true; result = ISC_R_SUCCESS; } else { result = DNS_R_NXDOMAIN; } } else { /* * Something bad happened. */ goto cleanup; } } finish: if (use_zone) { if (dns_rdataset_isassociated(rdataset)) { dns_rdataset_disassociate(rdataset); if (sigrdataset != NULL && dns_rdataset_isassociated(sigrdataset)) { dns_rdataset_disassociate(sigrdataset); } } dns_name_copy(zfname, fname); if (dcname != NULL) { dns_name_copy(zfname, dcname); } dns_rdataset_clone(&zrdataset, rdataset); if (sigrdataset != NULL && dns_rdataset_isassociated(&zrdataset)) { dns_rdataset_clone(&zsigrdataset, sigrdataset); } } else if (try_hints) { /* * We've found nothing so far, but we have hints. */ result = dns_db_find(view->hints, dns_rootname, NULL, dns_rdatatype_ns, 0, now, NULL, fname, rdataset, NULL); if (result != ISC_R_SUCCESS) { /* * We can't even find the hints for the root * nameservers! */ if (dns_rdataset_isassociated(rdataset)) { dns_rdataset_disassociate(rdataset); } result = ISC_R_NOTFOUND; } else if (dcname != NULL) { dns_name_copy(fname, dcname); } } cleanup: if (dns_rdataset_isassociated(&zrdataset)) { dns_rdataset_disassociate(&zrdataset); if (dns_rdataset_isassociated(&zsigrdataset)) { dns_rdataset_disassociate(&zsigrdataset); } } if (db != NULL) { dns_db_detach(&db); } if (zone != NULL) { dns_zone_detach(&zone); } return result; } isc_result_t dns_viewlist_find(dns_viewlist_t *list, const char *name, dns_rdataclass_t rdclass, dns_view_t **viewp) { dns_view_t *view; REQUIRE(list != NULL); for (view = ISC_LIST_HEAD(*list); view != NULL; view = ISC_LIST_NEXT(view, link)) { if (strcmp(view->name, name) == 0 && view->rdclass == rdclass) { break; } } if (view == NULL) { return ISC_R_NOTFOUND; } dns_view_attach(view, viewp); return ISC_R_SUCCESS; } isc_result_t dns_viewlist_findzone(dns_viewlist_t *list, const dns_name_t *name, bool allclasses, dns_rdataclass_t rdclass, dns_zone_t **zonep) { dns_view_t *view; isc_result_t result; dns_zone_t *zone1 = NULL, *zone2 = NULL; REQUIRE(list != NULL); REQUIRE(zonep != NULL && *zonep == NULL); for (view = ISC_LIST_HEAD(*list); view != NULL; view = ISC_LIST_NEXT(view, link)) { dns_zt_t *zonetable = NULL; if (!allclasses && view->rdclass != rdclass) { continue; } rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_find(zonetable, name, DNS_ZTFIND_EXACT, (zone1 == NULL) ? &zone1 : &zone2); } else { result = ISC_R_NOTFOUND; } rcu_read_unlock(); INSIST(result == ISC_R_SUCCESS || result == ISC_R_NOTFOUND); if (zone2 != NULL) { dns_zone_detach(&zone1); dns_zone_detach(&zone2); return ISC_R_MULTIPLE; } } if (zone1 != NULL) { dns_zone_attach(zone1, zonep); dns_zone_detach(&zone1); return ISC_R_SUCCESS; } return ISC_R_NOTFOUND; } isc_result_t dns_view_load(dns_view_t *view, bool stop, bool newonly) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_load(zonetable, stop, newonly); } else { result = ISC_R_SUCCESS; } rcu_read_unlock(); return result; } isc_result_t dns_view_asyncload(dns_view_t *view, bool newonly, dns_zt_callback_t *callback, void *arg) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_asyncload(zonetable, newonly, callback, arg); } else { result = ISC_R_SUCCESS; } rcu_read_unlock(); return result; } isc_result_t dns_view_gettsig(dns_view_t *view, const dns_name_t *keyname, dns_tsigkey_t **keyp) { isc_result_t result; REQUIRE(keyp != NULL && *keyp == NULL); result = dns_tsigkey_find(keyp, keyname, NULL, view->statickeys); if (result == ISC_R_NOTFOUND) { result = dns_tsigkey_find(keyp, keyname, NULL, view->dynamickeys); } return result; } isc_result_t dns_view_gettransport(dns_view_t *view, const dns_transport_type_t type, const dns_name_t *name, dns_transport_t **transportp) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(transportp != NULL && *transportp == NULL); dns_transport_t *transport = dns_transport_find(type, name, view->transports); if (transport == NULL) { return ISC_R_NOTFOUND; } *transportp = transport; return ISC_R_SUCCESS; } isc_result_t dns_view_getpeertsig(dns_view_t *view, const isc_netaddr_t *peeraddr, dns_tsigkey_t **keyp) { isc_result_t result; dns_name_t *keyname = NULL; dns_peer_t *peer = NULL; result = dns_peerlist_peerbyaddr(view->peers, peeraddr, &peer); if (result != ISC_R_SUCCESS) { return result; } result = dns_peer_getkey(peer, &keyname); if (result != ISC_R_SUCCESS) { return result; } result = dns_view_gettsig(view, keyname, keyp); return (result == ISC_R_NOTFOUND) ? ISC_R_FAILURE : result; } isc_result_t dns_view_checksig(dns_view_t *view, isc_buffer_t *source, dns_message_t *msg) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(source != NULL); return dns_tsig_verify(source, msg, view->statickeys, view->dynamickeys); } isc_result_t dns_view_flushcache(dns_view_t *view, bool fixuponly) { isc_result_t result; dns_adb_t *adb = NULL; REQUIRE(DNS_VIEW_VALID(view)); if (view->cachedb == NULL) { return ISC_R_SUCCESS; } if (!fixuponly) { result = dns_cache_flush(view->cache); if (result != ISC_R_SUCCESS) { return result; } } dns_db_detach(&view->cachedb); dns_cache_attachdb(view->cache, &view->cachedb); if (view->failcache != NULL) { dns_badcache_flush(view->failcache); } rcu_read_lock(); adb = rcu_dereference(view->adb); if (adb != NULL) { dns_adb_flush(adb); } rcu_read_unlock(); return ISC_R_SUCCESS; } isc_result_t dns_view_flushname(dns_view_t *view, const dns_name_t *name) { return dns_view_flushnode(view, name, false); } isc_result_t dns_view_flushnode(dns_view_t *view, const dns_name_t *name, bool tree) { isc_result_t result = ISC_R_SUCCESS; dns_adb_t *adb = NULL; REQUIRE(DNS_VIEW_VALID(view)); if (tree) { rcu_read_lock(); adb = rcu_dereference(view->adb); if (adb != NULL) { dns_adb_flushnames(adb, name); } rcu_read_unlock(); if (view->failcache != NULL) { dns_badcache_flushtree(view->failcache, name); } } else { rcu_read_lock(); adb = rcu_dereference(view->adb); if (adb != NULL) { dns_adb_flushname(adb, name); } rcu_read_unlock(); if (view->failcache != NULL) { dns_badcache_flushname(view->failcache, name); } } if (view->cache != NULL) { result = dns_cache_flushnode(view->cache, name, tree); } return result; } isc_result_t dns_view_freezezones(dns_view_t *view, bool value) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_freezezones(zonetable, view, value); } else { result = ISC_R_SUCCESS; } rcu_read_unlock(); return result; } void dns_view_initntatable(dns_view_t *view, isc_loopmgr_t *loopmgr) { REQUIRE(DNS_VIEW_VALID(view)); if (view->ntatable_priv != NULL) { dns_ntatable_detach(&view->ntatable_priv); } dns_ntatable_create(view, loopmgr, &view->ntatable_priv); } isc_result_t dns_view_getntatable(dns_view_t *view, dns_ntatable_t **ntp) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(ntp != NULL && *ntp == NULL); if (view->ntatable_priv == NULL) { return ISC_R_NOTFOUND; } dns_ntatable_attach(view->ntatable_priv, ntp); return ISC_R_SUCCESS; } void dns_view_initsecroots(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); if (view->secroots_priv != NULL) { dns_keytable_detach(&view->secroots_priv); } dns_keytable_create(view, &view->secroots_priv); } isc_result_t dns_view_getsecroots(dns_view_t *view, dns_keytable_t **ktp) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(ktp != NULL && *ktp == NULL); if (view->secroots_priv == NULL) { return ISC_R_NOTFOUND; } dns_keytable_attach(view->secroots_priv, ktp); return ISC_R_SUCCESS; } bool dns_view_ntacovers(dns_view_t *view, isc_stdtime_t now, const dns_name_t *name, const dns_name_t *anchor) { REQUIRE(DNS_VIEW_VALID(view)); if (view->ntatable_priv == NULL) { return false; } return dns_ntatable_covered(view->ntatable_priv, now, name, anchor); } isc_result_t dns_view_issecuredomain(dns_view_t *view, const dns_name_t *name, isc_stdtime_t now, bool checknta, bool *ntap, bool *secure_domain) { isc_result_t result; bool secure = false; dns_fixedname_t fn; dns_name_t *anchor; REQUIRE(DNS_VIEW_VALID(view)); if (view->secroots_priv == NULL) { return ISC_R_NOTFOUND; } anchor = dns_fixedname_initname(&fn); result = dns_keytable_issecuredomain(view->secroots_priv, name, anchor, &secure); if (result != ISC_R_SUCCESS) { return result; } SET_IF_NOT_NULL(ntap, false); if (checknta && secure && view->ntatable_priv != NULL && dns_ntatable_covered(view->ntatable_priv, now, name, anchor)) { if (ntap != NULL) { *ntap = true; } secure = false; } *secure_domain = secure; return ISC_R_SUCCESS; } void dns_view_untrust(dns_view_t *view, const dns_name_t *keyname, const dns_rdata_dnskey_t *dnskey) { isc_result_t result; dns_keytable_t *sr = NULL; dns_rdata_dnskey_t tmpkey; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(keyname != NULL); REQUIRE(dnskey != NULL); result = dns_view_getsecroots(view, &sr); if (result != ISC_R_SUCCESS) { return; } /* * Clear the revoke bit, if set, so that the key will match what's * in secroots now. */ tmpkey = *dnskey; tmpkey.flags &= ~DNS_KEYFLAG_REVOKE; result = dns_keytable_deletekey(sr, keyname, &tmpkey); if (result == ISC_R_SUCCESS) { /* * If key was found in secroots, then it was a * configured trust anchor, and we want to fail * secure. If there are no other configured keys, * then leave a null key so that we can't validate * anymore. */ dns_keytable_marksecure(sr, keyname); } dns_keytable_detach(&sr); } bool dns_view_istrusted(dns_view_t *view, const dns_name_t *keyname, const dns_rdata_dnskey_t *dnskey) { isc_result_t result; dns_keytable_t *sr = NULL; dns_keynode_t *knode = NULL; bool answer = false; dns_rdataset_t dsset; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(keyname != NULL); REQUIRE(dnskey != NULL); result = dns_view_getsecroots(view, &sr); if (result != ISC_R_SUCCESS) { return false; } dns_rdataset_init(&dsset); result = dns_keytable_find(sr, keyname, &knode); if (result == ISC_R_SUCCESS) { if (dns_keynode_dsset(knode, &dsset)) { dns_rdata_t rdata = DNS_RDATA_INIT; unsigned char data[4096], digest[DNS_DS_BUFFERSIZE]; dns_rdata_dnskey_t tmpkey = *dnskey; dns_rdata_ds_t ds; isc_buffer_t b; dns_rdataclass_t rdclass = tmpkey.common.rdclass; /* * Clear the revoke bit, if set, so that the key * will match what's in secroots now. */ tmpkey.flags &= ~DNS_KEYFLAG_REVOKE; isc_buffer_init(&b, data, sizeof(data)); result = dns_rdata_fromstruct(&rdata, rdclass, dns_rdatatype_dnskey, &tmpkey, &b); if (result != ISC_R_SUCCESS) { goto finish; } result = dns_ds_fromkeyrdata(keyname, &rdata, DNS_DSDIGEST_SHA256, digest, &ds); if (result != ISC_R_SUCCESS) { goto finish; } dns_rdata_reset(&rdata); isc_buffer_init(&b, data, sizeof(data)); result = dns_rdata_fromstruct( &rdata, rdclass, dns_rdatatype_ds, &ds, &b); if (result != ISC_R_SUCCESS) { goto finish; } result = dns_rdataset_first(&dsset); while (result == ISC_R_SUCCESS) { dns_rdata_t this = DNS_RDATA_INIT; dns_rdataset_current(&dsset, &this); if (dns_rdata_compare(&rdata, &this) == 0) { answer = true; break; } result = dns_rdataset_next(&dsset); } } } finish: if (dns_rdataset_isassociated(&dsset)) { dns_rdataset_disassociate(&dsset); } if (knode != NULL) { dns_keynode_detach(&knode); } dns_keytable_detach(&sr); return answer; } /* * Create path to a directory and a filename constructed from viewname. * This is a front-end to isc_file_sanitize(), allowing backward * compatibility to older versions when a file couldn't be expected * to be in the specified directory but might be in the current working * directory instead. * * It first tests for the existence of a file . in * 'directory'. If the file does not exist, it checks again in the * current working directory. If it does not exist there either, * return the path inside the directory. * * Returns ISC_R_SUCCESS if a path to an existing file is found or * a new path is created; returns ISC_R_NOSPACE if the path won't * fit in 'buflen'. */ static isc_result_t nz_legacy(const char *directory, const char *viewname, const char *suffix, char *buffer, size_t buflen) { isc_result_t result; char newbuf[PATH_MAX]; result = isc_file_sanitize(directory, viewname, suffix, buffer, buflen); if (result != ISC_R_SUCCESS) { return result; } else if (directory == NULL || isc_file_exists(buffer)) { return ISC_R_SUCCESS; } else { /* Save buffer */ strlcpy(newbuf, buffer, sizeof(newbuf)); } /* * It isn't in the specified directory; check CWD. */ result = isc_file_sanitize(NULL, viewname, suffix, buffer, buflen); if (result != ISC_R_SUCCESS || isc_file_exists(buffer)) { return result; } /* * File does not exist in either 'directory' or CWD, * so use the path in 'directory'. */ strlcpy(buffer, newbuf, buflen); return ISC_R_SUCCESS; } isc_result_t dns_view_setnewzones(dns_view_t *view, bool allow, void *cfgctx, void (*cfg_destroy)(void **), uint64_t mapsize) { isc_result_t result = ISC_R_SUCCESS; char buffer[1024]; #ifdef HAVE_LMDB MDB_env *env = NULL; int status; #endif /* ifdef HAVE_LMDB */ #ifndef HAVE_LMDB UNUSED(mapsize); #endif /* ifndef HAVE_LMDB */ REQUIRE(DNS_VIEW_VALID(view)); REQUIRE((cfgctx != NULL && cfg_destroy != NULL) || !allow); if (view->new_zone_file != NULL) { isc_mem_free(view->mctx, view->new_zone_file); view->new_zone_file = NULL; } #ifdef HAVE_LMDB if (view->new_zone_dbenv != NULL) { mdb_env_close((MDB_env *)view->new_zone_dbenv); view->new_zone_dbenv = NULL; } if (view->new_zone_db != NULL) { isc_mem_free(view->mctx, view->new_zone_db); view->new_zone_db = NULL; } #endif /* HAVE_LMDB */ if (view->new_zone_config != NULL) { view->cfg_destroy(&view->new_zone_config); view->cfg_destroy = NULL; } if (!allow) { return ISC_R_SUCCESS; } CHECK(nz_legacy(view->new_zone_dir, view->name, "nzf", buffer, sizeof(buffer))); view->new_zone_file = isc_mem_strdup(view->mctx, buffer); #ifdef HAVE_LMDB CHECK(nz_legacy(view->new_zone_dir, view->name, "nzd", buffer, sizeof(buffer))); view->new_zone_db = isc_mem_strdup(view->mctx, buffer); status = mdb_env_create(&env); if (status != MDB_SUCCESS) { isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, ISC_LOGMODULE_OTHER, ISC_LOG_ERROR, "mdb_env_create failed: %s", mdb_strerror(status)); CHECK(ISC_R_FAILURE); } if (mapsize != 0ULL) { status = mdb_env_set_mapsize(env, mapsize); if (status != MDB_SUCCESS) { isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, ISC_LOGMODULE_OTHER, ISC_LOG_ERROR, "mdb_env_set_mapsize failed: %s", mdb_strerror(status)); CHECK(ISC_R_FAILURE); } view->new_zone_mapsize = mapsize; } status = mdb_env_open(env, view->new_zone_db, DNS_LMDB_FLAGS, 0600); if (status != MDB_SUCCESS) { isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, ISC_LOGMODULE_OTHER, ISC_LOG_ERROR, "mdb_env_open of '%s' failed: %s", view->new_zone_db, mdb_strerror(status)); CHECK(ISC_R_FAILURE); } view->new_zone_dbenv = env; env = NULL; #endif /* HAVE_LMDB */ view->new_zone_config = cfgctx; view->cfg_destroy = cfg_destroy; cleanup: if (result != ISC_R_SUCCESS) { if (view->new_zone_file != NULL) { isc_mem_free(view->mctx, view->new_zone_file); view->new_zone_file = NULL; } #ifdef HAVE_LMDB if (view->new_zone_db != NULL) { isc_mem_free(view->mctx, view->new_zone_db); view->new_zone_db = NULL; } if (env != NULL) { mdb_env_close(env); } #endif /* HAVE_LMDB */ view->new_zone_config = NULL; view->cfg_destroy = NULL; } return result; } void dns_view_setnewzonedir(dns_view_t *view, const char *dir) { REQUIRE(DNS_VIEW_VALID(view)); if (view->new_zone_dir != NULL) { isc_mem_free(view->mctx, view->new_zone_dir); view->new_zone_dir = NULL; } if (dir == NULL) { return; } view->new_zone_dir = isc_mem_strdup(view->mctx, dir); } const char * dns_view_getnewzonedir(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); return view->new_zone_dir; } isc_result_t dns_view_searchdlz(dns_view_t *view, const dns_name_t *name, unsigned int minlabels, dns_clientinfomethods_t *methods, dns_clientinfo_t *clientinfo, dns_db_t **dbp) { dns_fixedname_t fname; dns_name_t *zonename; unsigned int namelabels; unsigned int i; isc_result_t result; dns_dlzfindzone_t findzone; dns_dlzdb_t *dlzdb; dns_db_t *db, *best = NULL; /* * Performs checks to make sure data is as we expect it to be. */ REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(name != NULL); REQUIRE(dbp != NULL && *dbp == NULL); /* setup a "fixed" dns name */ zonename = dns_fixedname_initname(&fname); /* count the number of labels in the name */ namelabels = dns_name_countlabels(name); for (dlzdb = ISC_LIST_HEAD(view->dlz_searched); dlzdb != NULL; dlzdb = ISC_LIST_NEXT(dlzdb, link)) { REQUIRE(DNS_DLZ_VALID(dlzdb)); /* * loop through starting with the longest domain name and * trying shorter names portions of the name until we find a * match, have an error, or are below the 'minlabels' * threshold. minlabels is 0, if neither the standard * database nor any previous DLZ database had a zone name * match. Otherwise minlabels is the number of labels * in that name. We need to beat that for a "better" * match for this DLZ database to be authoritative. */ for (i = namelabels; i > minlabels && i > 1; i--) { if (i == namelabels) { dns_name_copy(name, zonename); } else { dns_name_split(name, i, NULL, zonename); } /* ask SDLZ driver if the zone is supported */ db = NULL; findzone = dlzdb->implementation->methods->findzone; result = (*findzone)(dlzdb->implementation->driverarg, dlzdb->dbdata, dlzdb->mctx, view->rdclass, zonename, methods, clientinfo, &db); if (result != ISC_R_NOTFOUND) { if (best != NULL) { dns_db_detach(&best); } if (result == ISC_R_SUCCESS) { INSIST(db != NULL); dns_db_attach(db, &best); dns_db_detach(&db); minlabels = i; } else { if (db != NULL) { dns_db_detach(&db); } break; } } else if (db != NULL) { dns_db_detach(&db); } } } if (best != NULL) { dns_db_attach(best, dbp); dns_db_detach(&best); return ISC_R_SUCCESS; } return ISC_R_NOTFOUND; } uint32_t dns_view_getfailttl(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); return view->fail_ttl; } void dns_view_setfailttl(dns_view_t *view, uint32_t fail_ttl) { REQUIRE(DNS_VIEW_VALID(view)); view->fail_ttl = fail_ttl; } isc_result_t dns_view_saventa(dns_view_t *view) { isc_result_t result; bool removefile = false; dns_ntatable_t *ntatable = NULL; FILE *fp = NULL; REQUIRE(DNS_VIEW_VALID(view)); if (view->nta_lifetime == 0) { return ISC_R_SUCCESS; } /* Open NTA save file for overwrite. */ CHECK(isc_stdio_open(view->nta_file, "w", &fp)); result = dns_view_getntatable(view, &ntatable); if (result == ISC_R_NOTFOUND) { removefile = true; result = ISC_R_SUCCESS; goto cleanup; } else { CHECK(result); } result = dns_ntatable_save(ntatable, fp); if (result == ISC_R_NOTFOUND) { removefile = true; result = ISC_R_SUCCESS; } else if (result == ISC_R_SUCCESS) { result = isc_stdio_close(fp); fp = NULL; } cleanup: if (ntatable != NULL) { dns_ntatable_detach(&ntatable); } if (fp != NULL) { (void)isc_stdio_close(fp); } /* Don't leave half-baked NTA save files lying around. */ if (result != ISC_R_SUCCESS || removefile) { (void)isc_file_remove(view->nta_file); } return result; } #define TSTR(t) ((t).value.as_textregion.base) #define TLEN(t) ((t).value.as_textregion.length) isc_result_t dns_view_loadnta(dns_view_t *view) { isc_result_t result; dns_ntatable_t *ntatable = NULL; isc_lex_t *lex = NULL; isc_token_t token; isc_stdtime_t now = isc_stdtime_now(); REQUIRE(DNS_VIEW_VALID(view)); if (view->nta_lifetime == 0) { return ISC_R_SUCCESS; } isc_lex_create(view->mctx, 1025, &lex); CHECK(isc_lex_openfile(lex, view->nta_file)); CHECK(dns_view_getntatable(view, &ntatable)); for (;;) { int options = (ISC_LEXOPT_EOL | ISC_LEXOPT_EOF); char *name, *type, *timestamp; size_t len; dns_fixedname_t fn; const dns_name_t *ntaname; isc_buffer_t b; isc_stdtime_t t; bool forced; CHECK(isc_lex_gettoken(lex, options, &token)); if (token.type == isc_tokentype_eof) { break; } else if (token.type != isc_tokentype_string) { CHECK(ISC_R_UNEXPECTEDTOKEN); } name = TSTR(token); len = TLEN(token); if (strcmp(name, ".") == 0) { ntaname = dns_rootname; } else { dns_name_t *fname; fname = dns_fixedname_initname(&fn); isc_buffer_init(&b, name, (unsigned int)len); isc_buffer_add(&b, (unsigned int)len); CHECK(dns_name_fromtext(fname, &b, dns_rootname, 0, NULL)); ntaname = fname; } CHECK(isc_lex_gettoken(lex, options, &token)); if (token.type != isc_tokentype_string) { CHECK(ISC_R_UNEXPECTEDTOKEN); } type = TSTR(token); if (strcmp(type, "regular") == 0) { forced = false; } else if (strcmp(type, "forced") == 0) { forced = true; } else { CHECK(ISC_R_UNEXPECTEDTOKEN); } CHECK(isc_lex_gettoken(lex, options, &token)); if (token.type != isc_tokentype_string) { CHECK(ISC_R_UNEXPECTEDTOKEN); } timestamp = TSTR(token); CHECK(dns_time32_fromtext(timestamp, &t)); CHECK(isc_lex_gettoken(lex, options, &token)); if (token.type != isc_tokentype_eol && token.type != isc_tokentype_eof) { CHECK(ISC_R_UNEXPECTEDTOKEN); } if (now <= t) { if (t > (now + 604800)) { t = now + 604800; } (void)dns_ntatable_add(ntatable, ntaname, forced, 0, t); } else { char nb[DNS_NAME_FORMATSIZE]; dns_name_format(ntaname, nb, sizeof(nb)); isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSSEC, DNS_LOGMODULE_NTA, ISC_LOG_INFO, "ignoring expired NTA at %s", nb); } } cleanup: if (ntatable != NULL) { dns_ntatable_detach(&ntatable); } if (lex != NULL) { isc_lex_close(lex); isc_lex_destroy(&lex); } return result; } void dns_view_setviewcommit(dns_view_t *view) { dns_zone_t *redirect = NULL, *managed_keys = NULL; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); LOCK(&view->lock); if (view->redirect != NULL) { dns_zone_attach(view->redirect, &redirect); } if (view->managed_keys != NULL) { dns_zone_attach(view->managed_keys, &managed_keys); } UNLOCK(&view->lock); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { dns_zt_setviewcommit(zonetable); } rcu_read_unlock(); if (redirect != NULL) { dns_zone_setviewcommit(redirect); dns_zone_detach(&redirect); } if (managed_keys != NULL) { dns_zone_setviewcommit(managed_keys); dns_zone_detach(&managed_keys); } } void dns_view_setviewrevert(dns_view_t *view) { dns_zone_t *redirect = NULL, *managed_keys = NULL; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); /* * dns_zt_setviewrevert() attempts to lock this view, so we must * release the lock. */ LOCK(&view->lock); if (view->redirect != NULL) { dns_zone_attach(view->redirect, &redirect); } if (view->managed_keys != NULL) { dns_zone_attach(view->managed_keys, &managed_keys); } UNLOCK(&view->lock); if (redirect != NULL) { dns_zone_setviewrevert(redirect); dns_zone_detach(&redirect); } if (managed_keys != NULL) { dns_zone_setviewrevert(managed_keys); dns_zone_detach(&managed_keys); } rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { dns_zt_setviewrevert(zonetable); } rcu_read_unlock(); } bool dns_view_staleanswerenabled(dns_view_t *view) { uint32_t stale_ttl = 0; bool result = false; REQUIRE(DNS_VIEW_VALID(view)); if (dns_db_getservestalettl(view->cachedb, &stale_ttl) != ISC_R_SUCCESS) { return false; } if (stale_ttl > 0) { if (view->staleanswersok == dns_stale_answer_yes) { result = true; } else if (view->staleanswersok == dns_stale_answer_conf) { result = view->staleanswersenable; } } return result; } void dns_view_flushonshutdown(dns_view_t *view, bool flush) { REQUIRE(DNS_VIEW_VALID(view)); view->flush = flush; } void dns_view_sfd_add(dns_view_t *view, const dns_name_t *name) { isc_result_t result; REQUIRE(DNS_VIEW_VALID(view)); result = dns_nametree_add(view->sfd, name, 0); RUNTIME_CHECK(result == ISC_R_SUCCESS); } void dns_view_sfd_del(dns_view_t *view, const dns_name_t *name) { REQUIRE(DNS_VIEW_VALID(view)); dns_nametree_delete(view->sfd, name); } void dns_view_sfd_find(dns_view_t *view, const dns_name_t *name, dns_name_t *foundname) { REQUIRE(DNS_VIEW_VALID(view)); if (!dns_nametree_covered(view->sfd, name, foundname, 0)) { dns_name_copy(dns_rootname, foundname); } } isc_result_t dns_view_getresolver(dns_view_t *view, dns_resolver_t **resolverp) { isc_result_t result; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(resolverp != NULL && *resolverp == NULL); LOCK(&view->lock); if (view->resolver != NULL) { dns_resolver_attach(view->resolver, resolverp); result = ISC_R_SUCCESS; } else { result = ISC_R_SHUTTINGDOWN; } UNLOCK(&view->lock); return result; } void dns_view_setmaxrrperset(dns_view_t *view, uint32_t value) { REQUIRE(DNS_VIEW_VALID(view)); view->maxrrperset = value; if (view->cache != NULL) { dns_cache_setmaxrrperset(view->cache, value); } } void dns_view_setmaxtypepername(dns_view_t *view, uint32_t value) { REQUIRE(DNS_VIEW_VALID(view)); view->maxtypepername = value; if (view->cache != NULL) { dns_cache_setmaxtypepername(view->cache, value); } } void dns_view_setudpsize(dns_view_t *view, uint16_t udpsize) { REQUIRE(DNS_VIEW_VALID(view)); view->udpsize = udpsize; } uint16_t dns_view_getudpsize(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); return view->udpsize; } dns_dispatchmgr_t * dns_view_getdispatchmgr(dns_view_t *view) { REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); dns_dispatchmgr_t *dispatchmgr = rcu_dereference(view->dispatchmgr); if (dispatchmgr != NULL) { dns_dispatchmgr_ref(dispatchmgr); } rcu_read_unlock(); return dispatchmgr; } isc_result_t dns_view_addtrustedkey(dns_view_t *view, dns_rdatatype_t rdtype, const dns_name_t *keyname, isc_buffer_t *databuf) { isc_result_t result; dns_name_t *name = UNCONST(keyname); char rdatabuf[DST_KEY_MAXSIZE]; unsigned char digest[ISC_MAX_MD_SIZE]; dns_rdata_ds_t ds; dns_rdata_t rdata; isc_buffer_t b; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(view->rdclass == dns_rdataclass_in); if (rdtype != dns_rdatatype_dnskey && rdtype != dns_rdatatype_ds) { result = ISC_R_NOTIMPLEMENTED; goto cleanup; } isc_buffer_init(&b, rdatabuf, sizeof(rdatabuf)); dns_rdata_init(&rdata); isc_buffer_setactive(databuf, isc_buffer_usedlength(databuf)); CHECK(dns_rdata_fromwire(&rdata, view->rdclass, rdtype, databuf, DNS_DECOMPRESS_NEVER, &b)); if (rdtype == dns_rdatatype_ds) { CHECK(dns_rdata_tostruct(&rdata, &ds, NULL)); } else { CHECK(dns_ds_fromkeyrdata(name, &rdata, DNS_DSDIGEST_SHA256, digest, &ds)); } CHECK(dns_keytable_add(view->secroots_priv, false, false, name, &ds, NULL, NULL)); cleanup: return result; } isc_result_t dns_view_apply(dns_view_t *view, bool stop, isc_result_t *sub, isc_result_t (*action)(dns_zone_t *, void *), void *uap) { isc_result_t result; dns_zt_t *zonetable = NULL; REQUIRE(DNS_VIEW_VALID(view)); rcu_read_lock(); zonetable = rcu_dereference(view->zonetable); if (zonetable != NULL) { result = dns_zt_apply(zonetable, stop, sub, action, uap); } else { result = ISC_R_SHUTTINGDOWN; } rcu_read_unlock(); return result; } void dns_view_getadb(dns_view_t *view, dns_adb_t **adbp) { dns_adb_t *adb = NULL; REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(adbp != NULL && *adbp == NULL); rcu_read_lock(); adb = rcu_dereference(view->adb); if (adb != NULL) { dns_adb_attach(adb, adbp); } rcu_read_unlock(); } void dns_view_setmaxrestarts(dns_view_t *view, uint8_t max_restarts) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(max_restarts > 0); view->max_restarts = max_restarts; } void dns_view_setmaxqueries(dns_view_t *view, uint16_t max_queries) { REQUIRE(DNS_VIEW_VALID(view)); REQUIRE(max_queries > 0); view->max_queries = max_queries; }