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bind/lib/dns/view.c
Michał Kępień 8d996fd79c Fall back to normal recursion when mirror zone data is unavailable 
If transferring or loading a mirror zone fails, resolution should still
succeed by means of falling back to regular recursive queries.
Currently, though, if a slave zone is present in the zone table and not
loaded, a SERVFAIL response is generated.  Thus, mirror zones need
special handling in this regard.

Add a new dns_zt_find() flag, DNS_ZTFIND_MIRROR, and set it every time a
domain name is looked up rather than a zone itself.  Handle that flag in
dns_zt_find() in such a way that a mirror zone which is expired or not
yet loaded is ignored when looking up domain names, but still possible
to find when the caller wants to know whether the zone is configured.
This causes a fallback to recursion when mirror zone data is unavailable
without making unloaded mirror zones invisible to code checking a zone's
existence.
2018-06-28 13:38:39 +02:00

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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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <config.h>
#include <limits.h>
#ifdef HAVE_LMDB
#include <lmdb.h>
#endif
#include <isc/file.h>
#include <isc/hash.h>
#include <isc/lex.h>
#include <isc/print.h>
#include <isc/sha2.h>
#include <isc/stats.h>
#include <isc/string.h> /* Required for HP/UX (and others?) */
#include <isc/task.h>
#include <isc/util.h>
#include <dns/acl.h>
#include <dns/adb.h>
#include <dns/badcache.h>
#include <dns/cache.h>
#include <dns/db.h>
#include <dns/dispatch.h>
#include <dns/dlz.h>
#include <dns/dns64.h>
#include <dns/dnssec.h>
#include <dns/events.h>
#include <dns/forward.h>
#include <dns/keytable.h>
#include <dns/keyvalues.h>
#include <dns/master.h>
#include <dns/masterdump.h>
#include <dns/nta.h>
#include <dns/order.h>
#include <dns/peer.h>
#include <dns/rbt.h>
#include <dns/rdataset.h>
#include <dns/request.h>
#include <dns/resolver.h>
#include <dns/result.h>
#include <dns/rpz.h>
#include <dns/rrl.h>
#include <dns/stats.h>
#include <dns/time.h>
#include <dns/tsig.h>
#include <dns/zone.h>
#include <dns/zt.h>
#define CHECK(op) \
do { result = (op); \
if (result != ISC_R_SUCCESS) goto cleanup; \
} while (0)
#define RESSHUTDOWN(v) (((v)->attributes & DNS_VIEWATTR_RESSHUTDOWN) != 0)
#define ADBSHUTDOWN(v) (((v)->attributes & DNS_VIEWATTR_ADBSHUTDOWN) != 0)
#define REQSHUTDOWN(v) (((v)->attributes & DNS_VIEWATTR_REQSHUTDOWN) != 0)
#define DNS_VIEW_DELONLYHASH 111
#define DNS_VIEW_FAILCACHESIZE 1021
static void resolver_shutdown(isc_task_t *task, isc_event_t *event);
static void adb_shutdown(isc_task_t *task, isc_event_t *event);
static void req_shutdown(isc_task_t *task, isc_event_t *event);
isc_result_t
dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
const char *name, dns_view_t **viewp)
{
dns_view_t *view;
isc_result_t result;
char buffer[1024];
/*
* Create a view.
*/
REQUIRE(name != NULL);
REQUIRE(viewp != NULL && *viewp == NULL);
view = isc_mem_get(mctx, sizeof(*view));
if (view == NULL)
return (ISC_R_NOMEMORY);
view->nta_file = NULL;
view->mctx = NULL;
isc_mem_attach(mctx, &view->mctx);
view->name = isc_mem_strdup(mctx, name);
if (view->name == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_view;
}
result = isc_file_sanitize(NULL, view->name, "nta",
buffer, sizeof(buffer));
if (result != ISC_R_SUCCESS)
goto cleanup_name;
view->nta_file = isc_mem_strdup(mctx, buffer);
if (view->nta_file == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_name;
}
result = isc_mutex_init(&view->lock);
if (result != ISC_R_SUCCESS)
goto cleanup_name;
view->zonetable = NULL;
if (isc_bind9) {
result = dns_zt_create(mctx, rdclass, &view->zonetable);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_zt_create() failed: %s",
isc_result_totext(result));
result = ISC_R_UNEXPECTED;
goto cleanup_mutex;
}
}
view->secroots_priv = NULL;
view->ntatable_priv = NULL;
view->fwdtable = NULL;
result = dns_fwdtable_create(mctx, &view->fwdtable);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_fwdtable_create() failed: %s",
isc_result_totext(result));
result = ISC_R_UNEXPECTED;
goto cleanup_zt;
}
view->cache = NULL;
view->cachedb = NULL;
ISC_LIST_INIT(view->dlz_searched);
ISC_LIST_INIT(view->dlz_unsearched);
view->hints = NULL;
view->resolver = NULL;
view->adb = NULL;
view->requestmgr = NULL;
view->rdclass = rdclass;
view->frozen = ISC_FALSE;
view->task = NULL;
result = isc_refcount_init(&view->references, 1);
if (result != ISC_R_SUCCESS)
goto cleanup_fwdtable;
view->weakrefs = 0;
view->attributes = (DNS_VIEWATTR_RESSHUTDOWN|DNS_VIEWATTR_ADBSHUTDOWN|
DNS_VIEWATTR_REQSHUTDOWN);
view->statickeys = NULL;
view->dynamickeys = NULL;
view->matchclients = NULL;
view->matchdestinations = NULL;
view->matchrecursiveonly = ISC_FALSE;
result = dns_tsigkeyring_create(view->mctx, &view->dynamickeys);
if (result != ISC_R_SUCCESS)
goto cleanup_references;
view->peers = NULL;
view->order = NULL;
view->delonly = NULL;
view->rootdelonly = ISC_FALSE;
view->rootexclude = NULL;
view->adbstats = NULL;
view->resstats = NULL;
view->resquerystats = NULL;
view->cacheshared = ISC_FALSE;
ISC_LIST_INIT(view->dns64);
view->dns64cnt = 0;
/*
* Initialize configuration data with default values.
*/
view->recursion = ISC_TRUE;
view->qminimization = ISC_FALSE;
view->qmin_strict = ISC_FALSE;
view->auth_nxdomain = ISC_FALSE; /* Was true in BIND 8 */
view->enablednssec = ISC_TRUE;
view->enablevalidation = ISC_TRUE;
view->acceptexpired = ISC_FALSE;
view->use_glue_cache = ISC_FALSE;
view->minimal_any = ISC_FALSE;
view->minimalresponses = dns_minimal_no;
view->transfer_format = dns_one_answer;
view->cacheacl = NULL;
view->cacheonacl = NULL;
view->queryacl = NULL;
view->queryonacl = NULL;
view->recursionacl = NULL;
view->recursiononacl = NULL;
view->sortlist = NULL;
view->transferacl = NULL;
view->notifyacl = NULL;
view->updateacl = NULL;
view->upfwdacl = NULL;
view->denyansweracl = NULL;
view->nocasecompress = NULL;
view->msgcompression = ISC_TRUE;
view->answeracl_exclude = NULL;
view->denyanswernames = NULL;
view->answernames_exclude = NULL;
view->rrl = NULL;
view->provideixfr = ISC_TRUE;
view->maxcachettl = 7 * 24 * 3600;
view->maxncachettl = 3 * 3600;
view->nta_lifetime = 0;
view->nta_recheck = 0;
view->prefetch_eligible = 0;
view->prefetch_trigger = 0;
view->dstport = 53;
view->preferred_glue = 0;
view->flush = ISC_FALSE;
view->dlv = NULL;
view->maxudp = 0;
view->staleanswerttl = 1;
view->staleanswersok = dns_stale_answer_conf;
view->staleanswersenable = ISC_FALSE;
view->nocookieudp = 0;
view->padding = 0;
view->pad_acl = NULL;
view->maxbits = 0;
view->v4_aaaa = dns_aaaa_ok;
view->v6_aaaa = dns_aaaa_ok;
view->aaaa_acl = NULL;
view->rpzs = NULL;
view->catzs = NULL;
dns_fixedname_init(&view->dlv_fixed);
view->managed_keys = NULL;
view->redirect = NULL;
view->redirectzone = NULL;
dns_fixedname_init(&view->redirectfixed);
view->requestnsid = ISC_FALSE;
view->sendcookie = ISC_TRUE;
view->requireservercookie = ISC_FALSE;
view->synthfromdnssec = ISC_TRUE;
view->trust_anchor_telemetry = ISC_TRUE;
view->root_key_sentinel = ISC_TRUE;
view->new_zone_dir = NULL;
view->new_zone_file = NULL;
view->new_zone_db = NULL;
view->new_zone_dbenv = NULL;
view->new_zone_mapsize = 0ULL;
view->new_zone_config = NULL;
view->cfg_destroy = NULL;
view->fail_ttl = 0;
view->failcache = NULL;
(void)dns_badcache_init(view->mctx, DNS_VIEW_FAILCACHESIZE,
&view->failcache);
view->v6bias = 0;
view->dtenv = NULL;
view->dttypes = 0;
result = isc_mutex_init(&view->new_zone_lock);
if (result != ISC_R_SUCCESS)
goto cleanup_dynkeys;
if (isc_bind9) {
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;
result = dns_aclenv_init(view->mctx, &view->aclenv);
if (result != ISC_R_SUCCESS)
goto cleanup_peerlist;
ISC_LINK_INIT(view, link);
ISC_EVENT_INIT(&view->resevent, sizeof(view->resevent), 0, NULL,
DNS_EVENT_VIEWRESSHUTDOWN, resolver_shutdown,
view, NULL, NULL, NULL);
ISC_EVENT_INIT(&view->adbevent, sizeof(view->adbevent), 0, NULL,
DNS_EVENT_VIEWADBSHUTDOWN, adb_shutdown,
view, NULL, NULL, NULL);
ISC_EVENT_INIT(&view->reqevent, sizeof(view->reqevent), 0, NULL,
DNS_EVENT_VIEWREQSHUTDOWN, req_shutdown,
view, NULL, NULL, NULL);
view->viewlist = NULL;
view->magic = DNS_VIEW_MAGIC;
*viewp = view;
return (ISC_R_SUCCESS);
cleanup_peerlist:
if (view->peers != NULL)
dns_peerlist_detach(&view->peers);
cleanup_order:
if (view->order != NULL)
dns_order_detach(&view->order);
cleanup_new_zone_lock:
DESTROYLOCK(&view->new_zone_lock);
cleanup_dynkeys:
if (view->dynamickeys != NULL)
dns_tsigkeyring_detach(&view->dynamickeys);
cleanup_references:
isc_refcount_destroy(&view->references);
cleanup_fwdtable:
if (view->fwdtable != NULL)
dns_fwdtable_destroy(&view->fwdtable);
cleanup_zt:
if (view->zonetable != NULL)
dns_zt_detach(&view->zonetable);
cleanup_mutex:
DESTROYLOCK(&view->lock);
if (view->nta_file != NULL)
isc_mem_free(mctx, view->nta_file);
cleanup_name:
isc_mem_free(mctx, view->name);
cleanup_view:
isc_mem_putanddetach(&view->mctx, view, sizeof(*view));
return (result);
}
static inline void
destroy(dns_view_t *view) {
dns_dns64_t *dns64;
dns_dlzdb_t *dlzdb;
REQUIRE(!ISC_LINK_LINKED(view, link));
REQUIRE(isc_refcount_current(&view->references) == 0);
REQUIRE(view->weakrefs == 0);
REQUIRE(RESSHUTDOWN(view));
REQUIRE(ADBSHUTDOWN(view));
REQUIRE(REQSHUTDOWN(view));
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) {
dns_tsigkeyring_detach(&view->dynamickeys);
} else {
result = dns_tsigkeyring_dumpanddetach
(&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);
}
}
}
if (view->statickeys != NULL)
dns_tsigkeyring_detach(&view->statickeys);
if (view->adb != NULL)
dns_adb_detach(&view->adb);
if (view->resolver != NULL)
dns_resolver_detach(&view->resolver);
dns_rrl_view_destroy(view);
if (view->rpzs != NULL)
dns_rpz_detach_rpzs(&view->rpzs);
if (view->catzs != NULL)
dns_catz_catzs_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->requestmgr != NULL)
dns_requestmgr_detach(&view->requestmgr);
if (view->task != NULL)
isc_task_detach(&view->task);
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->aaaa_acl != NULL)
dns_acl_detach(&view->aaaa_acl);
if (view->pad_acl != NULL)
dns_acl_detach(&view->pad_acl);
if (view->answeracl_exclude != NULL)
dns_rbt_destroy(&view->answeracl_exclude);
if (view->denyanswernames != NULL)
dns_rbt_destroy(&view->denyanswernames);
if (view->answernames_exclude != NULL)
dns_rbt_destroy(&view->answernames_exclude);
if (view->delonly != NULL) {
dns_name_t *name;
int i;
for (i = 0; i < DNS_VIEW_DELONLYHASH; i++) {
name = ISC_LIST_HEAD(view->delonly[i]);
while (name != NULL) {
ISC_LIST_UNLINK(view->delonly[i], name, link);
dns_name_free(name, view->mctx);
isc_mem_put(view->mctx, name, sizeof(*name));
name = ISC_LIST_HEAD(view->delonly[i]);
}
}
isc_mem_put(view->mctx, view->delonly, sizeof(dns_namelist_t) *
DNS_VIEW_DELONLYHASH);
view->delonly = NULL;
}
if (view->rootexclude != NULL) {
dns_name_t *name;
int i;
for (i = 0; i < DNS_VIEW_DELONLYHASH; i++) {
name = ISC_LIST_HEAD(view->rootexclude[i]);
while (name != NULL) {
ISC_LIST_UNLINK(view->rootexclude[i],
name, link);
dns_name_free(name, view->mctx);
isc_mem_put(view->mctx, name, sizeof(*name));
name = ISC_LIST_HEAD(view->rootexclude[i]);
}
}
isc_mem_put(view->mctx, view->rootexclude,
sizeof(dns_namelist_t) * DNS_VIEW_DELONLYHASH);
view->rootexclude = NULL;
}
if (view->adbstats != NULL)
isc_stats_detach(&view->adbstats);
if (view->resstats != NULL)
isc_stats_detach(&view->resstats);
if (view->resquerystats != NULL)
dns_stats_detach(&view->resquerystats);
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, ISC_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_destroy(&view->aclenv);
if (view->failcache != NULL)
dns_badcache_destroy(&view->failcache);
DESTROYLOCK(&view->new_zone_lock);
DESTROYLOCK(&view->lock);
isc_refcount_destroy(&view->references);
isc_mem_free(view->mctx, view->nta_file);
isc_mem_free(view->mctx, view->name);
isc_mem_putanddetach(&view->mctx, view, sizeof(*view));
}
/*
* Return true iff 'view' may be freed.
* The caller must be holding the view lock.
*/
static isc_boolean_t
all_done(dns_view_t *view) {
if (isc_refcount_current(&view->references) == 0 &&
view->weakrefs == 0 &&
RESSHUTDOWN(view) && ADBSHUTDOWN(view) && REQSHUTDOWN(view))
return (ISC_TRUE);
return (ISC_FALSE);
}
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, NULL);
*targetp = source;
}
static void
view_flushanddetach(dns_view_t **viewp, isc_boolean_t flush) {
dns_view_t *view;
unsigned int refs;
isc_boolean_t done = ISC_FALSE;
REQUIRE(viewp != NULL);
view = *viewp;
REQUIRE(DNS_VIEW_VALID(view));
if (flush)
view->flush = ISC_TRUE;
isc_refcount_decrement(&view->references, &refs);
if (refs == 0) {
dns_zone_t *mkzone = NULL, *rdzone = NULL;
LOCK(&view->lock);
if (!RESSHUTDOWN(view))
dns_resolver_shutdown(view->resolver);
if (!ADBSHUTDOWN(view))
dns_adb_shutdown(view->adb);
if (!REQSHUTDOWN(view))
dns_requestmgr_shutdown(view->requestmgr);
if (view->zonetable != NULL) {
if (view->flush)
dns_zt_flushanddetach(&view->zonetable);
else
dns_zt_detach(&view->zonetable);
}
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_catzs_detach(&view->catzs);
}
done = all_done(view);
UNLOCK(&view->lock);
/* Need to detach zones outside view lock */
if (mkzone != NULL)
dns_zone_detach(&mkzone);
if (rdzone != NULL)
dns_zone_detach(&rdzone);
}
*viewp = NULL;
if (done)
destroy(view);
}
void
dns_view_flushanddetach(dns_view_t **viewp) {
view_flushanddetach(viewp, ISC_TRUE);
}
void
dns_view_detach(dns_view_t **viewp) {
view_flushanddetach(viewp, ISC_FALSE);
}
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) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->zonetable != NULL);
(void)dns_zt_apply(view->zonetable, ISC_FALSE, NULL, dialup, NULL);
}
void
dns_view_weakattach(dns_view_t *source, dns_view_t **targetp) {
REQUIRE(DNS_VIEW_VALID(source));
REQUIRE(targetp != NULL && *targetp == NULL);
LOCK(&source->lock);
source->weakrefs++;
UNLOCK(&source->lock);
*targetp = source;
}
void
dns_view_weakdetach(dns_view_t **viewp) {
dns_view_t *view;
isc_boolean_t done = ISC_FALSE;
REQUIRE(viewp != NULL);
view = *viewp;
REQUIRE(DNS_VIEW_VALID(view));
LOCK(&view->lock);
INSIST(view->weakrefs > 0);
view->weakrefs--;
done = all_done(view);
UNLOCK(&view->lock);
*viewp = NULL;
if (done)
destroy(view);
}
static void
resolver_shutdown(isc_task_t *task, isc_event_t *event) {
dns_view_t *view = event->ev_arg;
isc_boolean_t done;
REQUIRE(event->ev_type == DNS_EVENT_VIEWRESSHUTDOWN);
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->task == task);
UNUSED(task);
isc_event_free(&event);
LOCK(&view->lock);
view->attributes |= DNS_VIEWATTR_RESSHUTDOWN;
done = all_done(view);
UNLOCK(&view->lock);
if (done)
destroy(view);
}
static void
adb_shutdown(isc_task_t *task, isc_event_t *event) {
dns_view_t *view = event->ev_arg;
isc_boolean_t done;
REQUIRE(event->ev_type == DNS_EVENT_VIEWADBSHUTDOWN);
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->task == task);
UNUSED(task);
isc_event_free(&event);
LOCK(&view->lock);
view->attributes |= DNS_VIEWATTR_ADBSHUTDOWN;
done = all_done(view);
UNLOCK(&view->lock);
if (done)
destroy(view);
}
static void
req_shutdown(isc_task_t *task, isc_event_t *event) {
dns_view_t *view = event->ev_arg;
isc_boolean_t done;
REQUIRE(event->ev_type == DNS_EVENT_VIEWREQSHUTDOWN);
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->task == task);
UNUSED(task);
isc_event_free(&event);
LOCK(&view->lock);
view->attributes |= DNS_VIEWATTR_REQSHUTDOWN;
done = all_done(view);
UNLOCK(&view->lock);
if (done)
destroy(view);
}
isc_result_t
dns_view_createzonetable(dns_view_t *view) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(!view->frozen);
REQUIRE(view->zonetable == NULL);
return (dns_zt_create(view->mctx, view->rdclass, &view->zonetable));
}
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)
{
isc_result_t result;
isc_event_t *event;
isc_mem_t *mctx = NULL;
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(!view->frozen);
REQUIRE(view->resolver == NULL);
result = isc_task_create(taskmgr, 0, &view->task);
if (result != ISC_R_SUCCESS)
return (result);
isc_task_setname(view->task, "view", view);
result = dns_resolver_create(view, taskmgr, ntasks, ndisp, socketmgr,
timermgr, options, dispatchmgr,
dispatchv4, dispatchv6,
&view->resolver);
if (result != ISC_R_SUCCESS) {
isc_task_detach(&view->task);
return (result);
}
event = &view->resevent;
dns_resolver_whenshutdown(view->resolver, view->task, &event);
view->attributes &= ~DNS_VIEWATTR_RESSHUTDOWN;
result = isc_mem_create(0, 0, &mctx);
if (result != ISC_R_SUCCESS) {
dns_resolver_shutdown(view->resolver);
return (result);
}
result = dns_adb_create(mctx, view, timermgr, taskmgr, &view->adb);
isc_mem_setname(mctx, "ADB", NULL);
isc_mem_detach(&mctx);
if (result != ISC_R_SUCCESS) {
dns_resolver_shutdown(view->resolver);
return (result);
}
event = &view->adbevent;
dns_adb_whenshutdown(view->adb, view->task, &event);
view->attributes &= ~DNS_VIEWATTR_ADBSHUTDOWN;
result = dns_requestmgr_create(view->mctx, timermgr, socketmgr,
dns_resolver_taskmgr(view->resolver),
dns_resolver_dispatchmgr(view->resolver),
dispatchv4, dispatchv6,
&view->requestmgr);
if (result != ISC_R_SUCCESS) {
dns_adb_shutdown(view->adb);
dns_resolver_shutdown(view->resolver);
return (result);
}
event = &view->reqevent;
dns_requestmgr_whenshutdown(view->requestmgr, view->task, &event);
view->attributes &= ~DNS_VIEWATTR_REQSHUTDOWN;
return (ISC_R_SUCCESS);
}
void
dns_view_setcache(dns_view_t *view, dns_cache_t *cache, isc_boolean_t 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));
}
isc_boolean_t
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_setkeyring(dns_view_t *view, dns_tsig_keyring_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_tsig_keyring_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_tsig_keyring_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_keyring_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 = ISC_TRUE;
}
void
dns_view_thaw(dns_view_t *view) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->frozen);
view->frozen = ISC_FALSE;
}
isc_result_t
dns_view_addzone(dns_view_t *view, dns_zone_t *zone) {
isc_result_t result;
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(!view->frozen);
REQUIRE(view->zonetable != NULL);
result = dns_zt_mount(view->zonetable, zone);
return (result);
}
isc_result_t
dns_view_findzone(dns_view_t *view, const dns_name_t *name,
dns_zone_t **zonep)
{
isc_result_t result;
REQUIRE(DNS_VIEW_VALID(view));
LOCK(&view->lock);
if (view->zonetable != NULL) {
result = dns_zt_find(view->zonetable, name, 0, NULL, zonep);
if (result == DNS_R_PARTIALMATCH) {
dns_zone_detach(zonep);
result = ISC_R_NOTFOUND;
}
} else
result = ISC_R_NOTFOUND;
UNLOCK(&view->lock);
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,
isc_boolean_t use_hints, isc_boolean_t 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, *zdb;
dns_dbnode_t *node, *znode;
isc_boolean_t is_cache, is_staticstub_zone;
dns_rdataset_t zrdataset, zsigrdataset;
dns_zone_t *zone;
/*
* 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);
zdb = NULL;
znode = NULL;
/*
* Find a database to answer the query.
*/
db = NULL;
node = NULL;
is_staticstub_zone = ISC_FALSE;
zone = NULL;
LOCK(&view->lock);
if (view->zonetable != NULL)
result = dns_zt_find(view->zonetable, name, DNS_ZTFIND_MIRROR,
NULL, &zone);
else
result = ISC_R_NOTFOUND;
UNLOCK(&view->lock);
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 = ISC_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 = ISC_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) {
if (view->cachedb != NULL && !is_staticstub_zone) {
/*
* We found an answer, but the cache may be better.
* Remember what we've got and go look in the cache.
*/
is_cache = ISC_TRUE;
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_attach(db, &zdb);
dns_db_attachnode(zdb, node, &znode);
dns_db_detachnode(db, &node);
dns_db_detach(&db);
dns_db_attach(view->cachedb, &db);
goto db_find;
}
/*
* Otherwise, the glue is the best answer.
*/
result = ISC_R_SUCCESS;
}
if (result == ISC_R_NOTFOUND && 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_prime(view->resolver);
dns_db_attach(view->hints, &db);
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, isc_boolean_t 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,
ISC_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, isc_stdtime_t now,
unsigned int options, isc_boolean_t use_hints,
isc_boolean_t use_cache, dns_rdataset_t *rdataset,
dns_rdataset_t *sigrdataset)
{
isc_result_t result;
dns_db_t *db;
isc_boolean_t is_cache, use_zone, try_hints;
dns_zone_t *zone;
dns_name_t *zfname;
dns_rdataset_t zrdataset, zsigrdataset;
dns_fixedname_t zfixedname;
unsigned int ztoptions = DNS_ZTFIND_MIRROR;
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->frozen);
db = NULL;
use_zone = ISC_FALSE;
try_hints = ISC_FALSE;
zfname = NULL;
/*
* Initialize.
*/
dns_fixedname_init(&zfixedname);
dns_rdataset_init(&zrdataset);
dns_rdataset_init(&zsigrdataset);
/*
* Find the right database.
*/
zone = NULL;
LOCK(&view->lock);
if (view->zonetable != NULL) {
if ((options & DNS_DBFIND_NOEXACT) != 0)
ztoptions |= DNS_ZTFIND_NOEXACT;
result = dns_zt_find(view->zonetable, name, ztoptions,
NULL, &zone);
} else
result = ISC_R_NOTFOUND;
UNLOCK(&view->lock);
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 {
/*
* Maybe we have hints...
*/
try_hints = ISC_TRUE;
goto finish;
}
} 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;
if (use_cache && view->cachedb != NULL && db != view->hints) {
/*
* We found an answer, but the cache may be better.
*/
zfname = dns_fixedname_name(&zfixedname);
result = dns_name_copy(fname, zfname, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup;
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 = ISC_TRUE;
goto db_find;
}
} else {
result = dns_db_findzonecut(db, name, options, now, NULL,
fname, 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 = ISC_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 = ISC_TRUE;
} else {
/*
* Maybe we have hints...
*/
try_hints = ISC_TRUE;
}
} 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);
}
result = dns_name_copy(zfname, fname, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_rdataset_clone(&zrdataset, rdataset);
if (sigrdataset != NULL &&
dns_rdataset_isassociated(&zrdataset))
dns_rdataset_clone(&zsigrdataset, sigrdataset);
} else if (try_hints && use_hints && view->hints != NULL) {
/*
* 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;
}
}
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,
isc_boolean_t allclasses, dns_rdataclass_t rdclass,
dns_zone_t **zonep)
{
dns_view_t *view;
isc_result_t result;
dns_zone_t *zone1 = NULL, *zone2 = NULL;
dns_zone_t **zp = NULL;
REQUIRE(list != NULL);
REQUIRE(zonep != NULL && *zonep == NULL);
for (view = ISC_LIST_HEAD(*list);
view != NULL;
view = ISC_LIST_NEXT(view, link)) {
if (allclasses == ISC_FALSE && view->rdclass != rdclass)
continue;
/*
* If the zone is defined in more than one view,
* treat it as not found.
*/
zp = (zone1 == NULL) ? &zone1 : &zone2;
LOCK(&view->lock);
if (view->zonetable != NULL)
result = dns_zt_find(view->zonetable, name, 0,
NULL, zp);
else
result = ISC_R_NOTFOUND;
UNLOCK(&view->lock);
INSIST(result == ISC_R_SUCCESS ||
result == ISC_R_NOTFOUND ||
result == DNS_R_PARTIALMATCH);
/* Treat a partial match as no match */
if (result == DNS_R_PARTIALMATCH) {
dns_zone_detach(zp);
result = ISC_R_NOTFOUND;
POST(result);
}
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, isc_boolean_t stop) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->zonetable != NULL);
return (dns_zt_load(view->zonetable, stop));
}
isc_result_t
dns_view_loadnew(dns_view_t *view, isc_boolean_t stop) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->zonetable != NULL);
return (dns_zt_loadnew(view->zonetable, stop));
}
isc_result_t
dns_view_asyncload(dns_view_t *view, dns_zt_allloaded_t callback, void *arg) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->zonetable != NULL);
return (dns_zt_asyncload(view->zonetable, callback, arg));
}
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_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_dumpdbtostream(dns_view_t *view, FILE *fp) {
isc_result_t result;
REQUIRE(DNS_VIEW_VALID(view));
(void)fprintf(fp, ";\n; Cache dump of view '%s'\n;\n", view->name);
result = dns_master_dumptostream(view->mctx, view->cachedb, NULL,
&dns_master_style_cache,
dns_masterformat_text, NULL, fp);
if (result != ISC_R_SUCCESS)
return (result);
dns_adb_dump(view->adb, fp);
dns_resolver_printbadcache(view->resolver, fp);
dns_badcache_print(view->failcache, "SERVFAIL cache", fp);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_view_flushcache(dns_view_t *view, isc_boolean_t fixuponly) {
isc_result_t result;
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->resolver != NULL)
dns_resolver_flushbadcache(view->resolver, NULL);
if (view->failcache != NULL)
dns_badcache_flush(view->failcache);
dns_adb_flush(view->adb);
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, ISC_FALSE));
}
isc_result_t
dns_view_flushnode(dns_view_t *view, const dns_name_t *name,
isc_boolean_t tree)
{
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_VIEW_VALID(view));
if (tree) {
if (view->adb != NULL)
dns_adb_flushnames(view->adb, name);
if (view->resolver != NULL)
dns_resolver_flushbadnames(view->resolver, name);
if (view->failcache != NULL)
dns_badcache_flushtree(view->failcache, name);
} else {
if (view->adb != NULL)
dns_adb_flushname(view->adb, name);
if (view->resolver != NULL)
dns_resolver_flushbadcache(view->resolver, name);
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_adddelegationonly(dns_view_t *view, const dns_name_t *name) {
isc_result_t result;
dns_name_t *item;
isc_uint32_t hash;
REQUIRE(DNS_VIEW_VALID(view));
if (view->delonly == NULL) {
view->delonly = isc_mem_get(view->mctx,
sizeof(dns_namelist_t) *
DNS_VIEW_DELONLYHASH);
if (view->delonly == NULL)
return (ISC_R_NOMEMORY);
for (hash = 0; hash < DNS_VIEW_DELONLYHASH; hash++)
ISC_LIST_INIT(view->delonly[hash]);
}
hash = dns_name_hash(name, ISC_FALSE) % DNS_VIEW_DELONLYHASH;
item = ISC_LIST_HEAD(view->delonly[hash]);
while (item != NULL && !dns_name_equal(item, name))
item = ISC_LIST_NEXT(item, link);
if (item != NULL)
return (ISC_R_SUCCESS);
item = isc_mem_get(view->mctx, sizeof(*item));
if (item == NULL)
return (ISC_R_NOMEMORY);
dns_name_init(item, NULL);
result = dns_name_dup(name, view->mctx, item);
if (result == ISC_R_SUCCESS)
ISC_LIST_APPEND(view->delonly[hash], item, link);
else
isc_mem_put(view->mctx, item, sizeof(*item));
return (result);
}
isc_result_t
dns_view_excludedelegationonly(dns_view_t *view, const dns_name_t *name) {
isc_result_t result;
dns_name_t *item;
isc_uint32_t hash;
REQUIRE(DNS_VIEW_VALID(view));
if (view->rootexclude == NULL) {
view->rootexclude = isc_mem_get(view->mctx,
sizeof(dns_namelist_t) *
DNS_VIEW_DELONLYHASH);
if (view->rootexclude == NULL)
return (ISC_R_NOMEMORY);
for (hash = 0; hash < DNS_VIEW_DELONLYHASH; hash++)
ISC_LIST_INIT(view->rootexclude[hash]);
}
hash = dns_name_hash(name, ISC_FALSE) % DNS_VIEW_DELONLYHASH;
item = ISC_LIST_HEAD(view->rootexclude[hash]);
while (item != NULL && !dns_name_equal(item, name))
item = ISC_LIST_NEXT(item, link);
if (item != NULL)
return (ISC_R_SUCCESS);
item = isc_mem_get(view->mctx, sizeof(*item));
if (item == NULL)
return (ISC_R_NOMEMORY);
dns_name_init(item, NULL);
result = dns_name_dup(name, view->mctx, item);
if (result == ISC_R_SUCCESS)
ISC_LIST_APPEND(view->rootexclude[hash], item, link);
else
isc_mem_put(view->mctx, item, sizeof(*item));
return (result);
}
isc_boolean_t
dns_view_isdelegationonly(dns_view_t *view, const dns_name_t *name) {
dns_name_t *item;
isc_uint32_t hash;
REQUIRE(DNS_VIEW_VALID(view));
if (!view->rootdelonly && view->delonly == NULL)
return (ISC_FALSE);
hash = dns_name_hash(name, ISC_FALSE) % DNS_VIEW_DELONLYHASH;
if (view->rootdelonly && dns_name_countlabels(name) <= 2) {
if (view->rootexclude == NULL)
return (ISC_TRUE);
item = ISC_LIST_HEAD(view->rootexclude[hash]);
while (item != NULL && !dns_name_equal(item, name))
item = ISC_LIST_NEXT(item, link);
if (item == NULL)
return (ISC_TRUE);
}
if (view->delonly == NULL)
return (ISC_FALSE);
item = ISC_LIST_HEAD(view->delonly[hash]);
while (item != NULL && !dns_name_equal(item, name))
item = ISC_LIST_NEXT(item, link);
if (item == NULL)
return (ISC_FALSE);
return (ISC_TRUE);
}
void
dns_view_setrootdelonly(dns_view_t *view, isc_boolean_t value) {
REQUIRE(DNS_VIEW_VALID(view));
view->rootdelonly = value;
}
isc_boolean_t
dns_view_getrootdelonly(dns_view_t *view) {
REQUIRE(DNS_VIEW_VALID(view));
return (view->rootdelonly);
}
isc_result_t
dns_view_freezezones(dns_view_t *view, isc_boolean_t value) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(view->zonetable != NULL);
return (dns_zt_freezezones(view->zonetable, value));
}
void
dns_view_setadbstats(dns_view_t *view, isc_stats_t *stats) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(!view->frozen);
REQUIRE(view->adbstats == NULL);
isc_stats_attach(stats, &view->adbstats);
}
void
dns_view_getadbstats(dns_view_t *view, isc_stats_t **statsp) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(statsp != NULL && *statsp == NULL);
if (view->adbstats != NULL)
isc_stats_attach(view->adbstats, statsp);
}
void
dns_view_setresstats(dns_view_t *view, isc_stats_t *stats) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(!view->frozen);
REQUIRE(view->resstats == NULL);
isc_stats_attach(stats, &view->resstats);
}
void
dns_view_getresstats(dns_view_t *view, isc_stats_t **statsp) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(statsp != NULL && *statsp == NULL);
if (view->resstats != NULL)
isc_stats_attach(view->resstats, statsp);
}
void
dns_view_setresquerystats(dns_view_t *view, dns_stats_t *stats) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(!view->frozen);
REQUIRE(view->resquerystats == NULL);
dns_stats_attach(stats, &view->resquerystats);
}
void
dns_view_getresquerystats(dns_view_t *view, dns_stats_t **statsp) {
REQUIRE(DNS_VIEW_VALID(view));
REQUIRE(statsp != NULL && *statsp == NULL);
if (view->resquerystats != NULL)
dns_stats_attach(view->resquerystats, statsp);
}
isc_result_t
dns_view_initntatable(dns_view_t *view,
isc_taskmgr_t *taskmgr, isc_timermgr_t *timermgr)
{
REQUIRE(DNS_VIEW_VALID(view));
if (view->ntatable_priv != NULL)
dns_ntatable_detach(&view->ntatable_priv);
return (dns_ntatable_create(view, taskmgr, timermgr,
&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);
}
isc_result_t
dns_view_initsecroots(dns_view_t *view, isc_mem_t *mctx) {
REQUIRE(DNS_VIEW_VALID(view));
if (view->secroots_priv != NULL)
dns_keytable_detach(&view->secroots_priv);
return (dns_keytable_create(mctx, &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);
}
isc_boolean_t
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 (ISC_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, isc_boolean_t checknta,
isc_boolean_t *secure_domain)
{
isc_result_t result;
isc_boolean_t secure = ISC_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);
if (checknta && secure && view->ntatable_priv != NULL &&
dns_ntatable_covered(view->ntatable_priv, now, name, anchor))
secure = ISC_FALSE;
*secure_domain = secure;
return (ISC_R_SUCCESS);
}
void
dns_view_untrust(dns_view_t *view, const dns_name_t *keyname,
dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx)
{
isc_result_t result;
unsigned char data[4096];
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_buffer_t buffer;
dst_key_t *key = NULL;
dns_keytable_t *sr = NULL;
/*
* Clear the revoke bit, if set, so that the key will match what's
* in secroots now.
*/
dnskey->flags &= ~DNS_KEYFLAG_REVOKE;
/* Convert dnskey to DST key. */
isc_buffer_init(&buffer, data, sizeof(data));
dns_rdata_fromstruct(&rdata, dnskey->common.rdclass,
dns_rdatatype_dnskey, dnskey, &buffer);
result = dns_dnssec_keyfromrdata(keyname, &rdata, mctx, &key);
if (result != ISC_R_SUCCESS)
return;
result = dns_view_getsecroots(view, &sr);
if (result == ISC_R_SUCCESS) {
result = dns_keytable_deletekeynode(sr, key);
/*
* 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.
*/
if (result == ISC_R_SUCCESS)
dns_keytable_marksecure(sr, keyname);
dns_keytable_detach(&sr);
}
dst_key_free(&key);
}
/*
* Create path to a directory and a filename contructed 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 <viewname>.<suffix> 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'.
*/
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
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, isc_boolean_t allow, void *cfgctx,
void (*cfg_destroy)(void **), isc_uint64_t mapsize)
{
isc_result_t result = ISC_R_SUCCESS;
char buffer[1024];
#ifdef HAVE_LMDB
MDB_env *env = NULL;
int status;
#endif
#ifndef HAVE_LMDB
UNUSED(mapsize);
#endif
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);
if (view->new_zone_file == NULL) {
CHECK(ISC_R_NOMEMORY);
}
#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);
if (view->new_zone_db == NULL) {
CHECK(ISC_R_NOMEMORY);
}
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) {
result = dns_name_copy(name, zonename, NULL);
if (result != ISC_R_SUCCESS)
return (result);
} 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);
}
isc_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, isc_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;
isc_boolean_t removefile = ISC_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 = ISC_TRUE;
result = ISC_R_SUCCESS;
goto cleanup;
} else
CHECK(result);
result = dns_ntatable_save(ntatable, fp);
if (result == ISC_R_NOTFOUND) {
removefile = ISC_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;
REQUIRE(DNS_VIEW_VALID(view));
if (view->nta_lifetime == 0)
return (ISC_R_SUCCESS);
CHECK(isc_lex_create(view->mctx, 1025, &lex));
CHECK(isc_lex_openfile(lex, view->nta_file));
CHECK(dns_view_getntatable(view, &ntatable));
isc_stdtime_get(&now);
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;
isc_boolean_t 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 = ISC_FALSE;
else if (strcmp(type, "forced") == 0)
forced = ISC_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) {
REQUIRE(DNS_VIEW_VALID(view));
LOCK(&view->lock);
if (view->redirect != NULL) {
dns_zone_setviewcommit(view->redirect);
}
if (view->managed_keys != NULL) {
dns_zone_setviewcommit(view->managed_keys);
}
if (view->zonetable != NULL) {
dns_zt_setviewcommit(view->zonetable);
}
UNLOCK(&view->lock);
}
void
dns_view_setviewrevert(dns_view_t *view) {
dns_zt_t *zonetable;
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_setviewrevert(view->redirect);
}
if (view->managed_keys != NULL) {
dns_zone_setviewrevert(view->managed_keys);
}
zonetable = view->zonetable;
UNLOCK(&view->lock);
if (zonetable != NULL) {
dns_zt_setviewrevert(zonetable);
}
}
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