20089043 Upgrade Solaris to BIND 9.6-ESV-R11-P1
20089135 problem in SERVICE/DNS-SERVER
This patch was obtained from ISC for 9.6-ESV-R11-P1. The patch can
only be obtained from [email protected] on an as needed
basis.
diff --git a/CHANGES b/CHANGES
index 178f73d..8ace4fb 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,17 @@
+ --- 9.6-ESV-R11-P1 released ---
+
+4006. [security] A flaw in delegation handling could be exploited
+ to put named into an infinite loop. This has
+ been addressed by placing limits on the number
+ of levels of recursion named will allow (default 7),
+ and the number of iterative queries that it will
+ send (default 50) before terminating a recursive
+ query (CVE-2014-8500).
+
+ The recursion depth limit is configured via the
+ "max-recursion-depth" option, and the query limit
+ via the "max-recursion-queries" option. [RT #37580]
+
--- 9.6-ESV-R11 released ---
--- 9.6-ESV-R11rc2 released ---
diff --git a/bin/named/config.c b/bin/named/config.c
index d85afa7..823d101 100644
--- a/bin/named/config.c
+++ b/bin/named/config.c
@@ -15,8 +15,6 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id$ */
-
/*! \file */
#include <config.h>
@@ -145,6 +143,8 @@ options {\n\
dnssec-accept-expired no;\n\
clients-per-query 10;\n\
max-clients-per-query 100;\n\
+ max-recursion-depth 7;\n\
+ max-recursion-queries 50;\n\
zero-no-soa-ttl-cache no;\n\
nsec3-test-zone no;\n\
"
diff --git a/bin/named/include/named/query.h b/bin/named/include/named/query.h
index 20aff40..771345e 100644
--- a/bin/named/include/named/query.h
+++ b/bin/named/include/named/query.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004, 2005, 2007, 2010, 2012 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004, 2005, 2007, 2010, 2011, 2013, 2014 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2002 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
@@ -15,8 +15,6 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id$ */
-
#ifndef NAMED_QUERY_H
#define NAMED_QUERY_H 1
diff --git a/bin/named/query.c b/bin/named/query.c
index 10a7d9a..48e4822 100644
--- a/bin/named/query.c
+++ b/bin/named/query.c
@@ -3343,13 +3343,12 @@ query_recurse(ns_client_t *client, dns_rdatatype_t qtype, dns_name_t *qdomain,
peeraddr = &client->peeraddr;
else
peeraddr = NULL;
- result = dns_resolver_createfetch2(client->view->resolver,
+ result = dns_resolver_createfetch3(client->view->resolver,
client->query.qname,
qtype, qdomain, nameservers,
NULL, peeraddr, client->message->id,
- client->query.fetchoptions,
- client->task,
- query_resume, client,
+ client->query.fetchoptions, 0, NULL,
+ client->task, query_resume, client,
rdataset, sigrdataset,
&client->query.fetch);
diff --git a/bin/named/server.c b/bin/named/server.c
index af53b48..4d48074 100644
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -15,8 +15,6 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id$ */
-
/*! \file */
#include <config.h>
@@ -2048,6 +2046,16 @@ configure_view(dns_view_t *view, const cfg_obj_t *config,
max_clients_per_query);
obj = NULL;
+ result = ns_config_get(maps, "max-recursion-depth", &obj);
+ INSIST(result == ISC_R_SUCCESS);
+ dns_resolver_setmaxdepth(view->resolver, cfg_obj_asuint32(obj));
+
+ obj = NULL;
+ result = ns_config_get(maps, "max-recursion-queries", &obj);
+ INSIST(result == ISC_R_SUCCESS);
+ dns_resolver_setmaxqueries(view->resolver, cfg_obj_asuint32(obj));
+
+ obj = NULL;
result = ns_config_get(maps, "dnssec-enable", &obj);
INSIST(result == ISC_R_SUCCESS);
view->enablednssec = cfg_obj_asboolean(obj);
diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index f894aab..b823dc4 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -4652,6 +4652,8 @@ category notify { null; };
<optional> max-acache-size <replaceable>size_spec</replaceable> ; </optional>
<optional> clients-per-query <replaceable>number</replaceable> ; </optional>
<optional> max-clients-per-query <replaceable>number</replaceable> ; </optional>
+ <optional> max-recursion-depth <replaceable>number</replaceable> ; </optional>
+ <optional> max-recursion-queries <replaceable>number</replaceable> ; </optional>
<optional> masterfile-format (<constant>text</constant>|<constant>raw</constant>) ; </optional>
<optional> empty-server <replaceable>name</replaceable> ; </optional>
<optional> empty-contact <replaceable>name</replaceable> ; </optional>
@@ -4729,6 +4731,35 @@ category notify { null; };
</listitem>
</varlistentry>
+ <varlistentry id="max-recursion-depth">
+ <term><command>max-recursion-depth</command></term>
+ <listitem>
+ <para>
+ Sets the maximum number of levels of recursion
+ that are permitted at any one time while servicing
+ a recursive query. Resolving a name may require
+ looking up a name server address, which in turn
+ requires resolving another name, etc; if the number
+ of indirections exceeds this value, the recursive
+ query is terminated and returns SERVFAIL. The
+ default is 7.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry id="max-recursion-queries">
+ <term><command>max-recursion-queries</command></term>
+ <listitem>
+ <para>
+ Sets the maximum number of iterative queries that
+ may be sent while servicing a recursive query.
+ If more queries are sent, the recursive query
+ is terminated and returns SERVFAIL. The default
+ is 50.
+ </para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term><command>tkey-gssapi-credential</command></term>
<listitem>
diff --git a/lib/dns/adb.c b/lib/dns/adb.c
index 2d7b904..422e59c 100644
--- a/lib/dns/adb.c
+++ b/lib/dns/adb.c
@@ -200,6 +200,7 @@ struct dns_adbfetch {
unsigned int magic;
dns_fetch_t *fetch;
dns_rdataset_t rdataset;
+ unsigned int depth;
};
/*%
@@ -298,8 +299,7 @@ static inline isc_boolean_t dec_entry_refcnt(dns_adb_t *, isc_boolean_t,
static inline void violate_locking_hierarchy(isc_mutex_t *, isc_mutex_t *);
static isc_boolean_t clean_namehooks(dns_adb_t *, dns_adbnamehooklist_t *);
static void clean_target(dns_adb_t *, dns_name_t *);
-static void clean_finds_at_name(dns_adbname_t *, isc_eventtype_t,
- unsigned int);
+static void clean_finds_at_name(dns_adbname_t *, isc_eventtype_t, unsigned int);
static isc_boolean_t check_expire_namehooks(dns_adbname_t *, isc_stdtime_t);
static isc_boolean_t check_expire_entry(dns_adb_t *, dns_adbentry_t **,
isc_stdtime_t);
@@ -307,6 +307,7 @@ static void cancel_fetches_at_name(dns_adbname_t *);
static isc_result_t dbfind_name(dns_adbname_t *, isc_stdtime_t,
dns_rdatatype_t);
static isc_result_t fetch_name(dns_adbname_t *, isc_boolean_t,
+ unsigned int, isc_counter_t *qc,
dns_rdatatype_t);
static inline void check_exit(dns_adb_t *);
static void destroy(dns_adb_t *);
@@ -2282,6 +2283,19 @@ dns_adb_createfind(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
isc_stdtime_t now, dns_name_t *target,
in_port_t port, dns_adbfind_t **findp)
{
+ return (dns_adb_createfind2(adb, task, action, arg, name,
+ qname, qtype, options, now,
+ target, port, 0, NULL, findp));
+}
+
+isc_result_t
+dns_adb_createfind2(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
+ void *arg, dns_name_t *name, dns_name_t *qname,
+ dns_rdatatype_t qtype, unsigned int options,
+ isc_stdtime_t now, dns_name_t *target,
+ in_port_t port, unsigned int depth, isc_counter_t *qc,
+ dns_adbfind_t **findp)
+{
dns_adbfind_t *find;
dns_adbname_t *adbname;
int bucket;
@@ -2512,7 +2526,7 @@ dns_adb_createfind(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
* Start V4.
*/
if (WANT_INET(wanted_fetches) &&
- fetch_name(adbname, start_at_zone,
+ fetch_name(adbname, start_at_zone, depth, qc,
dns_rdatatype_a) == ISC_R_SUCCESS) {
DP(DEF_LEVEL,
"dns_adb_createfind: started A fetch for name %p",
@@ -2523,7 +2537,7 @@ dns_adb_createfind(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
* Start V6.
*/
if (WANT_INET6(wanted_fetches) &&
- fetch_name(adbname, start_at_zone,
+ fetch_name(adbname, start_at_zone, depth, qc,
dns_rdatatype_aaaa) == ISC_R_SUCCESS) {
DP(DEF_LEVEL,
"dns_adb_createfind: "
@@ -3256,6 +3270,12 @@ fetch_callback(isc_task_t *task, isc_event_t *ev) {
DP(DEF_LEVEL, "adb: fetch of '%s' %s failed: %s",
buf, address_type == DNS_ADBFIND_INET ? "A" : "AAAA",
dns_result_totext(dev->result));
+ /*
+ * Don't record a failure unless this is the initial
+ * fetch of a chain.
+ */
+ if (fetch->depth > 1)
+ goto out;
/* XXXMLG Don't pound on bad servers. */
if (address_type == DNS_ADBFIND_INET) {
name->expire_v4 = ISC_MIN(name->expire_v4, now + 300);
@@ -3293,9 +3313,8 @@ fetch_callback(isc_task_t *task, isc_event_t *ev) {
}
static isc_result_t
-fetch_name(dns_adbname_t *adbname,
- isc_boolean_t start_at_zone,
- dns_rdatatype_t type)
+fetch_name(dns_adbname_t *adbname, isc_boolean_t start_at_zone,
+ unsigned int depth, isc_counter_t *qc, dns_rdatatype_t type)
{
isc_result_t result;
dns_adbfetch_t *fetch = NULL;
@@ -3340,12 +3359,14 @@ fetch_name(dns_adbname_t *adbname,
result = ISC_R_NOMEMORY;
goto cleanup;
}
+ fetch->depth = depth;
- result = dns_resolver_createfetch(adb->view->resolver, &adbname->name,
- type, name, nameservers, NULL,
- options, adb->task, fetch_callback,
- adbname, &fetch->rdataset, NULL,
- &fetch->fetch);
+ result = dns_resolver_createfetch3(adb->view->resolver, &adbname->name,
+ type, name, nameservers, NULL,
+ NULL, 0, options, depth, qc,
+ adb->task, fetch_callback, adbname,
+ &fetch->rdataset, NULL,
+ &fetch->fetch);
if (result != ISC_R_SUCCESS)
goto cleanup;
diff --git a/lib/dns/include/dns/adb.h b/lib/dns/include/dns/adb.h
index d4d1b05..556fcc2 100644
--- a/lib/dns/include/dns/adb.h
+++ b/lib/dns/include/dns/adb.h
@@ -334,6 +334,13 @@ dns_adb_createfind(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
dns_rdatatype_t qtype, unsigned int options,
isc_stdtime_t now, dns_name_t *target,
in_port_t port, dns_adbfind_t **find);
+isc_result_t
+dns_adb_createfind2(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
+ void *arg, dns_name_t *name, dns_name_t *qname,
+ dns_rdatatype_t qtype, unsigned int options,
+ isc_stdtime_t now, dns_name_t *target, in_port_t port,
+ unsigned int depth, isc_counter_t *qc,
+ dns_adbfind_t **find);
/*%<
* Main interface for clients. The adb will look up the name given in
* "name" and will build up a list of found addresses, and perhaps start
diff --git a/lib/dns/include/dns/resolver.h b/lib/dns/include/dns/resolver.h
index d293daa..10c3a3a 100644
--- a/lib/dns/include/dns/resolver.h
+++ b/lib/dns/include/dns/resolver.h
@@ -270,6 +270,18 @@ dns_resolver_createfetch2(dns_resolver_t *res, dns_name_t *name,
dns_rdataset_t *rdataset,
dns_rdataset_t *sigrdataset,
dns_fetch_t **fetchp);
+isc_result_t
+dns_resolver_createfetch3(dns_resolver_t *res, dns_name_t *name,
+ dns_rdatatype_t type,
+ dns_name_t *domain, dns_rdataset_t *nameservers,
+ dns_forwarders_t *forwarders,
+ isc_sockaddr_t *client, isc_uint16_t id,
+ unsigned int options, unsigned int depth,
+ isc_counter_t *qc, isc_task_t *task,
+ isc_taskaction_t action, void *arg,
+ dns_rdataset_t *rdataset,
+ dns_rdataset_t *sigrdataset,
+ dns_fetch_t **fetchp);
/*%<
* Recurse to answer a question.
*
@@ -550,6 +562,30 @@ dns_resolver_printbadcache(dns_resolver_t *resolver, FILE *fp);
* \li resolver to be valid.
*/
+void
+dns_resolver_setmaxdepth(dns_resolver_t *resolver, unsigned int maxdepth);
+unsigned int
+dns_resolver_getmaxdepth(dns_resolver_t *resolver);
+/*%
+ * Get and set how many NS indirections will be followed when looking for
+ * nameserver addresses.
+ *
+ * Requires:
+ * \li resolver to be valid.
+ */
+
+void
+dns_resolver_setmaxqueries(dns_resolver_t *resolver, unsigned int queries);
+unsigned int
+dns_resolver_getmaxqueries(dns_resolver_t *resolver);
+/*%
+ * Get and set how many iterative queries will be allowed before
+ * terminating a recursive query.
+ *
+ * Requires:
+ * \li resolver to be valid.
+ */
+
ISC_LANG_ENDDECLS
#endif /* DNS_RESOLVER_H */
diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
index 7dcea6d..bd3d9fd 100644
--- a/lib/dns/resolver.c
+++ b/lib/dns/resolver.c
@@ -21,6 +21,7 @@
#include <config.h>
+#include <isc/counter.h>
#include <isc/log.h>
#include <isc/platform.h>
#include <isc/print.h>
@@ -109,6 +110,16 @@
#define QTRACE(m)
#endif
+/* The default maximum number of recursions to follow before giving up. */
+#ifndef DEFAULT_RECURSION_DEPTH
+#define DEFAULT_RECURSION_DEPTH 7
+#endif
+
+/* The default maximum number of iterative queries to allow before giving up. */
+#ifndef DEFAULT_MAX_QUERIES
+#define DEFAULT_MAX_QUERIES 50
+#endif
+
/*%
* Maximum EDNS0 input packet size.
*/
@@ -211,12 +222,13 @@ struct fetchctx {
isc_sockaddrlist_t edns;
isc_sockaddrlist_t edns512;
isc_sockaddrlist_t bad_edns;
- dns_validator_t *validator;
+ dns_validator_t * validator;
ISC_LIST(dns_validator_t) validators;
dns_db_t * cache;
dns_adb_t * adb;
isc_boolean_t ns_ttl_ok;
isc_uint32_t ns_ttl;
+ isc_counter_t * qc;
/*%
* The number of events we're waiting for.
@@ -283,6 +295,7 @@ struct fetchctx {
unsigned int valfail;
isc_boolean_t timeout;
dns_adbaddrinfo_t *addrinfo;
+ unsigned int depth;
};
#define FCTX_MAGIC ISC_MAGIC('F', '!', '!', '!')
@@ -394,6 +407,8 @@ struct dns_resolver {
unsigned int spillatmin;
isc_timer_t * spillattimer;
isc_boolean_t zero_no_soa_ttl;
+ unsigned int maxdepth;
+ unsigned int maxqueries;
/* Locked by lock. */
unsigned int references;
@@ -1495,6 +1510,7 @@ fctx_query(fetchctx_t *fctx, dns_adbaddrinfo_t *addrinfo,
if (result != ISC_R_SUCCESS)
goto cleanup_dispatch;
}
+
fctx->querysent++;
ISC_LIST_APPEND(fctx->queries, query, link);
@@ -2146,9 +2162,9 @@ fctx_finddone(isc_task_t *task, isc_event_t *event) {
*/
INSIST(!SHUTTINGDOWN(fctx));
fctx->attributes &= ~FCTX_ATTR_ADDRWAIT;
- if (event->ev_type == DNS_EVENT_ADBMOREADDRESSES)
+ if (event->ev_type == DNS_EVENT_ADBMOREADDRESSES) {
want_try = ISC_TRUE;
- else {
+ } else {
fctx->findfail++;
if (fctx->pending == 0) {
/*
@@ -2177,7 +2193,7 @@ fctx_finddone(isc_task_t *task, isc_event_t *event) {
else if (want_done)
fctx_done(fctx, ISC_R_FAILURE, __LINE__);
else if (destroy) {
- fctx_destroy(fctx);
+ fctx_destroy(fctx);
if (bucket_empty)
empty_bucket(res);
}
@@ -2499,12 +2515,13 @@ findname(fetchctx_t *fctx, dns_name_t *name, in_port_t port,
* See what we know about this address.
*/
find = NULL;
- result = dns_adb_createfind(fctx->adb,
- res->buckets[fctx->bucketnum].task,
- fctx_finddone, fctx, name,
- &fctx->name, fctx->type,
- options, now, NULL,
- res->view->dstport, &find);
+ result = dns_adb_createfind2(fctx->adb,
+ res->buckets[fctx->bucketnum].task,
+ fctx_finddone, fctx, name,
+ &fctx->name, fctx->type,
+ options, now, NULL,
+ res->view->dstport,
+ fctx->depth + 1, fctx->qc, &find);
if (result != ISC_R_SUCCESS) {
if (result == DNS_R_ALIAS) {
/*
@@ -2612,6 +2629,14 @@ fctx_getaddresses(fetchctx_t *fctx, isc_boolean_t badcache) {
res = fctx->res;
+ if (fctx->depth > res->maxdepth) {
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_RESOLVER,
+ DNS_LOGMODULE_RESOLVER, ISC_LOG_DEBUG(3),
+ "too much NS indirection resolving '%s'",
+ fctx->info);
+ return (DNS_R_SERVFAIL);
+ }
+
/*
* Forwarders.
*/
@@ -3087,6 +3112,16 @@ fctx_try(fetchctx_t *fctx, isc_boolean_t retrying, isc_boolean_t badcache) {
}
}
+ result = isc_counter_increment(fctx->qc);
+ if (result != ISC_R_SUCCESS) {
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_RESOLVER,
+ DNS_LOGMODULE_RESOLVER, ISC_LOG_DEBUG(3),
+ "exceeded max queries resolving '%s'",
+ fctx->info);
+ fctx_done(fctx, DNS_R_SERVFAIL, __LINE__);
+ return;
+ }
+
result = fctx_query(fctx, addrinfo, fctx->options);
if (result != ISC_R_SUCCESS)
fctx_done(fctx, result, __LINE__);
@@ -3185,6 +3220,7 @@ fctx_destroy(fetchctx_t *fctx) {
isc_mem_put(fctx->mctx, sa, sizeof(*sa));
}
+ isc_counter_detach(&fctx->qc);
isc_timer_detach(&fctx->timer);
dns_message_destroy(&fctx->rmessage);
dns_message_destroy(&fctx->qmessage);
@@ -3512,7 +3548,8 @@ log_ns_ttl(fetchctx_t *fctx, const char *where) {
static isc_result_t
fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
dns_name_t *domain, dns_rdataset_t *nameservers,
- unsigned int options, unsigned int bucketnum, fetchctx_t **fctxp)
+ unsigned int options, unsigned int bucketnum, unsigned int depth,
+ isc_counter_t *qc, fetchctx_t **fctxp)
{
fetchctx_t *fctx;
isc_result_t result;
@@ -3534,6 +3571,21 @@ fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
fctx = isc_mem_get(mctx, sizeof(*fctx));
if (fctx == NULL)
return (ISC_R_NOMEMORY);
+
+ fctx->qc = NULL;
+ if (qc != NULL) {
+ isc_counter_attach(qc, &fctx->qc);
+ } else {
+ result = isc_counter_create(res->mctx,
+ res->maxqueries, &fctx->qc);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup_fetch;
+ }
+
+ /*
+ * Make fctx->info point to a copy of a formatted string
+ * "name/type".
+ */
dns_name_format(name, buf, sizeof(buf));
dns_rdatatype_format(type, typebuf, sizeof(typebuf));
strcat(buf, "/"); /* checked */
@@ -3541,7 +3593,7 @@ fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
fctx->info = isc_mem_strdup(mctx, buf);
if (fctx->info == NULL) {
result = ISC_R_NOMEMORY;
- goto cleanup_fetch;
+ goto cleanup_counter;
}
FCTXTRACE("create");
dns_name_init(&fctx->name, NULL);
@@ -3564,6 +3616,7 @@ fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
fctx->state = fetchstate_init;
fctx->want_shutdown = ISC_FALSE;
fctx->cloned = ISC_FALSE;
+ fctx->depth = depth;
ISC_LIST_INIT(fctx->queries);
ISC_LIST_INIT(fctx->finds);
ISC_LIST_INIT(fctx->altfinds);
@@ -3768,6 +3821,9 @@ fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
cleanup_info:
isc_mem_free(mctx, fctx->info);
+ cleanup_counter:
+ isc_counter_detach(&fctx->qc);
+
cleanup_fetch:
isc_mem_put(mctx, fctx, sizeof(*fctx));
@@ -7339,6 +7395,8 @@ dns_resolver_create(dns_view_t *view,
res->zero_no_soa_ttl = ISC_FALSE;
res->ndisps = 0;
res->nextdisp = 0; /* meaningless at this point, but init it */
+ res->maxdepth = DEFAULT_RECURSION_DEPTH;
+ res->maxqueries = DEFAULT_MAX_QUERIES;
res->nbuckets = ntasks;
res->activebuckets = ntasks;
res->buckets = isc_mem_get(view->mctx,
@@ -7778,9 +7836,9 @@ dns_resolver_createfetch(dns_resolver_t *res, dns_name_t *name,
dns_rdataset_t *sigrdataset,
dns_fetch_t **fetchp)
{
- return (dns_resolver_createfetch2(res, name, type, domain,
+ return (dns_resolver_createfetch3(res, name, type, domain,
nameservers, forwarders, NULL, 0,
- options, task, action, arg,
+ options, 0, NULL, task, action, arg,
rdataset, sigrdataset, fetchp));
}
@@ -7796,6 +7854,25 @@ dns_resolver_createfetch2(dns_resolver_t *res, dns_name_t *name,
dns_rdataset_t *sigrdataset,
dns_fetch_t **fetchp)
{
+ return (dns_resolver_createfetch3(res, name, type, domain,
+ nameservers, forwarders, client, id,
+ options, 0, NULL, task, action, arg,
+ rdataset, sigrdataset, fetchp));
+}
+
+isc_result_t
+dns_resolver_createfetch3(dns_resolver_t *res, dns_name_t *name,
+ dns_rdatatype_t type,
+ dns_name_t *domain, dns_rdataset_t *nameservers,
+ dns_forwarders_t *forwarders,
+ isc_sockaddr_t *client, dns_messageid_t id,
+ unsigned int options, unsigned int depth,
+ isc_counter_t *qc, isc_task_t *task,
+ isc_taskaction_t action, void *arg,
+ dns_rdataset_t *rdataset,
+ dns_rdataset_t *sigrdataset,
+ dns_fetch_t **fetchp)
+{
dns_fetch_t *fetch;
fetchctx_t *fctx = NULL;
isc_result_t result = ISC_R_SUCCESS;
@@ -7882,11 +7959,12 @@ dns_resolver_createfetch2(dns_resolver_t *res, dns_name_t *name,
if (fctx == NULL) {
result = fctx_create(res, name, type, domain, nameservers,
- options, bucketnum, &fctx);
+ options, bucketnum, depth, qc, &fctx);
if (result != ISC_R_SUCCESS)
goto unlock;
new_fctx = ISC_TRUE;
- }
+ } else if (fctx->depth > depth)
+ fctx->depth = depth;
result = fctx_join(fctx, task, client, id, action, arg,
rdataset, sigrdataset, fetch);
@@ -8637,3 +8715,27 @@ dns_resolver_getoptions(dns_resolver_t *resolver) {
return (resolver->options);
}
+
+void
+dns_resolver_setmaxdepth(dns_resolver_t *resolver, unsigned int maxdepth) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ resolver->maxdepth = maxdepth;
+}
+
+unsigned int
+dns_resolver_getmaxdepth(dns_resolver_t *resolver) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ return (resolver->maxdepth);
+}
+
+void
+dns_resolver_setmaxqueries(dns_resolver_t *resolver, unsigned int queries) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ resolver->maxqueries = queries;
+}
+
+unsigned int
+dns_resolver_getmaxqueries(dns_resolver_t *resolver) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ return (resolver->maxqueries);
+}
diff --git a/lib/isc/Makefile.in b/lib/isc/Makefile.in
index 0b4020b..afc19ee 100644
--- a/lib/isc/Makefile.in
+++ b/lib/isc/Makefile.in
@@ -13,8 +13,6 @@
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
-# $Id$
-
srcdir = @srcdir@
VPATH = @srcdir@
top_srcdir = @top_srcdir@
@@ -53,7 +51,7 @@ WIN32OBJS = win32/condition.@O@ win32/dir.@O@ win32/file.@O@ \
# Alphabetically
OBJS = @ISC_EXTRA_OBJS@ \
assertions.@O@ base32.@O@ base64.@O@ bitstring.@O@ buffer.@O@ \
- bufferlist.@O@ commandline.@O@ error.@O@ event.@O@ \
+ bufferlist.@O@ commandline.@O@ counter.@O@ error.@O@ event.@O@ \
hash.@O@ heap.@O@ hex.@O@ hmacmd5.@O@ hmacsha.@O@ \
httpd.@O@ inet_aton.@O@ iterated_hash.@O@ \
lex.@O@ lfsr.@O@ lib.@O@ log.@O@ \
@@ -68,7 +66,7 @@ OBJS = @ISC_EXTRA_OBJS@ \
# Alphabetically
SRCS = @ISC_EXTRA_SRCS@ \
assertions.c base32.c base64.c bitstring.c buffer.c \
- bufferlist.c commandline.c error.c event.c \
+ bufferlist.c commandline.c counter.c error.c event.c \
heap.c hex.c hmacmd5.c hmacsha.c \
httpd.c inet_aton.c iterated_hash.c \
lex.c lfsr.c lib.c log.c \
diff --git a/lib/isc/include/isc/Makefile.in b/lib/isc/include/isc/Makefile.in
index 9adca3e..1cfbbd1 100644
--- a/lib/isc/include/isc/Makefile.in
+++ b/lib/isc/include/isc/Makefile.in
@@ -13,8 +13,6 @@
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
-# $Id$
-
srcdir = @srcdir@
VPATH = @srcdir@
top_srcdir = @top_srcdir@
@@ -27,7 +25,7 @@ top_srcdir = @top_srcdir@
# install target below.
#
HEADERS = app.h assertions.h base64.h bitstring.h boolean.h buffer.h \
- bufferlist.h commandline.h entropy.h error.h event.h \
+ bufferlist.h commandline.h counter.h entropy.h error.h event.h \
eventclass.h file.h formatcheck.h fsaccess.h \
hash.h heap.h hex.h hmacmd5.h hmacsha.h \
httpd.h \
diff --git a/lib/isc/include/isc/types.h b/lib/isc/include/isc/types.h
index 8e8b08f..a646b8b 100644
--- a/lib/isc/include/isc/types.h
+++ b/lib/isc/include/isc/types.h
@@ -45,6 +45,7 @@ typedef struct isc_buffer isc_buffer_t; /*%< Buffer */
typedef ISC_LIST(isc_buffer_t) isc_bufferlist_t; /*%< Buffer List */
typedef struct isc_constregion isc_constregion_t; /*%< Const region */
typedef struct isc_consttextregion isc_consttextregion_t; /*%< Const Text Region */
+typedef struct isc_counter isc_counter_t; /*%< Counter */
typedef struct isc_entropy isc_entropy_t; /*%< Entropy */
typedef struct isc_entropysource isc_entropysource_t; /*%< Entropy Source */
typedef struct isc_event isc_event_t; /*%< Event */
diff --git a/lib/isccfg/namedconf.c b/lib/isccfg/namedconf.c
index fac2633..3023dcc 100644
--- a/lib/isccfg/namedconf.c
+++ b/lib/isccfg/namedconf.c
@@ -15,8 +15,6 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id$ */
-
/*! \file */
#include <config.h>
@@ -830,6 +828,8 @@ view_clauses[] = {
{ "max-cache-ttl", &cfg_type_uint32, 0 },
{ "max-clients-per-query", &cfg_type_uint32, 0 },
{ "max-ncache-ttl", &cfg_type_uint32, 0 },
+ { "max-recursion-depth", &cfg_type_uint32, 0 },
+ { "max-recursion-queries", &cfg_type_uint32, 0 },
{ "max-udp-size", &cfg_type_uint32, 0 },
{ "min-roots", &cfg_type_uint32, CFG_CLAUSEFLAG_NOTIMP },
{ "minimal-responses", &cfg_type_boolean, 0 },
diff --git a/version b/version
index 1be3c16..2058444 100644
--- a/version
+++ b/version
@@ -10,4 +10,4 @@ MINORVER=6
PATCHVER=
RELEASETYPE=-ESV
RELEASEVER=-R11
-EXTENSIONS=
+EXTENSIONS=-P1
diff --git a/lib/isc/counter.c b/lib/isc/counter.c
new file mode 100644
index 0000000..d7d187b
--- /dev/null
+++ b/lib/isc/counter.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <stddef.h>
+
+#include <isc/counter.h>
+#include <isc/magic.h>
+#include <isc/mem.h>
+#include <isc/util.h>
+
+#define COUNTER_MAGIC ISC_MAGIC('C', 'n', 't', 'r')
+#define VALID_COUNTER(r) ISC_MAGIC_VALID(r, COUNTER_MAGIC)
+
+struct isc_counter {
+ unsigned int magic;
+ isc_mem_t *mctx;
+ isc_mutex_t lock;
+ unsigned int references;
+ unsigned int limit;
+ unsigned int used;
+};
+
+isc_result_t
+isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp) {
+ isc_result_t result;
+ isc_counter_t *counter;
+
+ REQUIRE(counterp != NULL && *counterp == NULL);
+
+ counter = isc_mem_get(mctx, sizeof(*counter));
+ if (counter == NULL)
+ return (ISC_R_NOMEMORY);
+
+ result = isc_mutex_init(&counter->lock);
+ if (result != ISC_R_SUCCESS) {
+ isc_mem_put(mctx, counter, sizeof(*counter));
+ return (result);
+ }
+
+ counter->mctx = NULL;
+ isc_mem_attach(mctx, &counter->mctx);
+
+ counter->references = 1;
+ counter->limit = limit;
+ counter->used = 0;
+
+ counter->magic = COUNTER_MAGIC;
+ *counterp = counter;
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_counter_increment(isc_counter_t *counter) {
+ isc_result_t result = ISC_R_SUCCESS;
+
+ LOCK(&counter->lock);
+ counter->used++;
+ if (counter->limit != 0 && counter->used >= counter->limit)
+ result = ISC_R_QUOTA;
+ UNLOCK(&counter->lock);
+
+ return (result);
+}
+
+unsigned int
+isc_counter_used(isc_counter_t *counter) {
+ REQUIRE(VALID_COUNTER(counter));
+
+ return (counter->used);
+}
+
+void
+isc_counter_setlimit(isc_counter_t *counter, int limit) {
+ REQUIRE(VALID_COUNTER(counter));
+
+ LOCK(&counter->lock);
+ counter->limit = limit;
+ UNLOCK(&counter->lock);
+}
+
+void
+isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp) {
+ REQUIRE(VALID_COUNTER(source));
+ REQUIRE(targetp != NULL && *targetp == NULL);
+
+ LOCK(&source->lock);
+ source->references++;
+ INSIST(source->references > 0);
+ UNLOCK(&source->lock);
+
+ *targetp = source;
+}
+
+static void
+destroy(isc_counter_t *counter) {
+ counter->magic = 0;
+ isc_mutex_destroy(&counter->lock);
+ isc_mem_putanddetach(&counter->mctx, counter, sizeof(*counter));
+}
+
+void
+isc_counter_detach(isc_counter_t **counterp) {
+ isc_counter_t *counter;
+ isc_boolean_t want_destroy = ISC_FALSE;
+
+ REQUIRE(counterp != NULL && *counterp != NULL);
+ counter = *counterp;
+ REQUIRE(VALID_COUNTER(counter));
+
+ *counterp = NULL;
+
+ LOCK(&counter->lock);
+ INSIST(counter->references > 0);
+ counter->references--;
+ if (counter->references == 0)
+ want_destroy = ISC_TRUE;
+ UNLOCK(&counter->lock);
+
+ if (want_destroy)
+ destroy(counter);
+}
diff --git a/lib/isc/include/isc/counter.h b/lib/isc/include/isc/counter.h
new file mode 100644
index 0000000..e7ebd25
--- /dev/null
+++ b/lib/isc/include/isc/counter.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef ISC_COUNTER_H
+#define ISC_COUNTER_H 1
+
+/*****
+ ***** Module Info
+ *****/
+
+/*! \file isc/counter.h
+ *
+ * \brief The isc_counter_t object is a simplified version of the
+ * isc_quota_t object; it tracks the consumption of limited
+ * resources, returning an error condition when the quota is
+ * exceeded. However, unlike isc_quota_t, attaching and detaching
+ * from a counter object does not increment or decrement the counter.
+ */
+
+/***
+ *** Imports.
+ ***/
+
+#include <isc/lang.h>
+#include <isc/mutex.h>
+#include <isc/types.h>
+
+/*****
+ ***** Types.
+ *****/
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp);
+/*%<
+ * Allocate and initialize a counter object.
+ */
+
+isc_result_t
+isc_counter_increment(isc_counter_t *counter);
+/*%<
+ * Increment the counter.
+ *
+ * If the counter limit is nonzero and has been reached, then
+ * return ISC_R_QUOTA, otherwise ISC_R_SUCCESS. (The counter is
+ * incremented regardless of return value.)
+ */
+
+unsigned int
+isc_counter_used(isc_counter_t *counter);
+/*%<
+ * Return the current counter value.
+ */
+
+void
+isc_counter_setlimit(isc_counter_t *counter, int limit);
+/*%<
+ * Set the counter limit.
+ */
+
+void
+isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp);
+/*%<
+ * Attach to a counter object, increasing its reference counter.
+ */
+
+void
+isc_counter_detach(isc_counter_t **counterp);
+/*%<
+ * Detach (and destroy if reference counter has dropped to zero)
+ * a counter object.
+ */
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_COUNTER_H */
diff --git a/lib/isc/tests/counter_test.c b/lib/isc/tests/counter_test.c
new file mode 100644
index 0000000..a7a1997
--- /dev/null
+++ b/lib/isc/tests/counter_test.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+
+#include <atf-c.h>
+
+#include <isc/counter.h>
+#include <isc/result.h>
+
+#include "isctest.h"
+
+ATF_TC(isc_counter);
+ATF_TC_HEAD(isc_counter, tc) {
+ atf_tc_set_md_var(tc, "descr", "isc counter object");
+}
+ATF_TC_BODY(isc_counter, tc) {
+ isc_result_t result;
+ isc_counter_t *counter = NULL;
+ int i;
+
+ result = isc_test_begin(NULL, ISC_TRUE);
+ ATF_REQUIRE_EQ(result, ISC_R_SUCCESS);
+
+ result = isc_counter_create(mctx, 0, &counter);
+ ATF_REQUIRE_EQ(result, ISC_R_SUCCESS);
+
+ for (i = 0; i < 10; i++) {
+ result = isc_counter_increment(counter);
+ ATF_CHECK_EQ(result, ISC_R_SUCCESS);
+ }
+
+ ATF_CHECK_EQ(isc_counter_used(counter), 10);
+
+ isc_counter_setlimit(counter, 15);
+ for (i = 0; i < 10; i++) {
+ result = isc_counter_increment(counter);
+ if (result != ISC_R_SUCCESS)
+ break;
+ }
+
+ ATF_CHECK_EQ(isc_counter_used(counter), 15);
+
+ isc_counter_detach(&counter);
+ isc_test_end();
+}
+
+/*
+ * Main
+ */
+ATF_TP_ADD_TCS(tp) {
+ ATF_TP_ADD_TC(tp, isc_counter);
+ return (atf_no_error());
+}
+