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-rw-r--r--contrib/bind9/bin/named/query.c108
1 files changed, 61 insertions, 47 deletions
diff --git a/contrib/bind9/bin/named/query.c b/contrib/bind9/bin/named/query.c
index a5411af3433f..75102fd1369d 100644
--- a/contrib/bind9/bin/named/query.c
+++ b/contrib/bind9/bin/named/query.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: query.c,v 1.198.2.13.4.30 2004/06/30 14:13:05 marka Exp $ */
+/* $Id: query.c,v 1.198.2.13.4.36 2005/08/11 05:25:20 marka Exp $ */
#include <config.h>
@@ -1198,17 +1198,7 @@ query_addadditional(void *arg, dns_name_t *name, dns_rdatatype_t qtype) {
* recursing to add address records, which in turn can cause
* recursion to add KEYs.
*/
- if (type == dns_rdatatype_a || type == dns_rdatatype_aaaa) {
- /*
- * RFC 2535 section 3.5 says that when A or AAAA records are
- * retrieved as additional data, any KEY RRs for the owner name
- * should be added to the additional data section.
- *
- * XXXRTH We should lower the priority here. Alternatively,
- * we could raise the priority of glue records.
- */
- eresult = query_addadditional(client, name, dns_rdatatype_dnskey);
- } else if (type == dns_rdatatype_srv && trdataset != NULL) {
+ if (type == dns_rdatatype_srv && trdataset != NULL) {
/*
* If we're adding SRV records to the additional data
* section, it's helpful if we add the SRV additional data
@@ -1241,8 +1231,6 @@ static inline void
query_addrdataset(ns_client_t *client, dns_name_t *fname,
dns_rdataset_t *rdataset)
{
- dns_rdatatype_t type = rdataset->type;
-
/*
* Add 'rdataset' and any pertinent additional data to
* 'fname', a name in the response message for 'client'.
@@ -1266,22 +1254,6 @@ query_addrdataset(ns_client_t *client, dns_name_t *fname,
*/
(void)dns_rdataset_additionaldata(rdataset,
query_addadditional, client);
- /*
- * RFC 2535 section 3.5 says that when NS, SOA, A, or AAAA records
- * are retrieved, any KEY RRs for the owner name should be added
- * to the additional data section. We treat A6 records the same way.
- *
- * We don't care if query_addadditional() fails.
- */
- if (type == dns_rdatatype_ns || type == dns_rdatatype_soa ||
- type == dns_rdatatype_a || type == dns_rdatatype_aaaa ||
- type == dns_rdatatype_a6) {
- /*
- * XXXRTH We should lower the priority here. Alternatively,
- * we could raise the priority of glue records.
- */
- (void)query_addadditional(client, fname, dns_rdatatype_dnskey);
- }
CTRACE("query_addrdataset: done");
}
@@ -2116,33 +2088,37 @@ query_recurse(ns_client_t *client, dns_rdatatype_t qtype, dns_name_t *qdomain,
* connection was accepted (if allowed by the TCP quota).
*/
if (client->recursionquota == NULL) {
- isc_boolean_t killoldest = ISC_FALSE;
result = isc_quota_attach(&ns_g_server->recursionquota,
&client->recursionquota);
- if (result == ISC_R_SOFTQUOTA) {
+ if (result == ISC_R_SOFTQUOTA) {
ns_client_log(client, NS_LOGCATEGORY_CLIENT,
NS_LOGMODULE_QUERY, ISC_LOG_WARNING,
- "recursive-clients limit exceeded, "
+ "recursive-clients soft limit exceeded, "
"aborting oldest query");
- killoldest = ISC_TRUE;
+ ns_client_killoldestquery(client);
result = ISC_R_SUCCESS;
- }
- if (dns_resolver_nrunning(client->view->resolver) >
- (unsigned int)ns_g_server->recursionquota.max)
- result = ISC_R_QUOTA;
- if (result == ISC_R_SUCCESS && !client->mortal &&
- (client->attributes & NS_CLIENTATTR_TCP) == 0)
- result = ns_client_replace(client);
- if (result != ISC_R_SUCCESS) {
+ } else if (result == ISC_R_QUOTA) {
ns_client_log(client, NS_LOGCATEGORY_CLIENT,
NS_LOGMODULE_QUERY, ISC_LOG_WARNING,
"no more recursive clients: %s",
isc_result_totext(result));
- if (client->recursionquota != NULL)
+ ns_client_killoldestquery(client);
+ }
+ if (result == ISC_R_SUCCESS && !client->mortal &&
+ (client->attributes & NS_CLIENTATTR_TCP) == 0) {
+ result = ns_client_replace(client);
+ if (result != ISC_R_SUCCESS) {
+ ns_client_log(client, NS_LOGCATEGORY_CLIENT,
+ NS_LOGMODULE_QUERY,
+ ISC_LOG_WARNING,
+ "ns_client_replace() failed: %s",
+ isc_result_totext(result));
isc_quota_detach(&client->recursionquota);
- return (result);
+ }
}
- ns_client_recursing(client, killoldest);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ ns_client_recursing(client);
}
/*
@@ -2319,6 +2295,34 @@ query_addnoqnameproof(ns_client_t *client, dns_rdataset_t *rdataset) {
query_releasename(client, &fname);
}
+static inline void
+answer_in_glue(ns_client_t *client, dns_rdatatype_t qtype) {
+ dns_name_t *name;
+ dns_message_t *msg;
+ dns_section_t section = DNS_SECTION_ADDITIONAL;
+ dns_rdataset_t *rdataset = NULL;
+
+ msg = client->message;
+ for (name = ISC_LIST_HEAD(msg->sections[section]);
+ name != NULL;
+ name = ISC_LIST_NEXT(name, link))
+ if (dns_name_equal(name, client->query.qname)) {
+ for (rdataset = ISC_LIST_HEAD(name->list);
+ rdataset != NULL;
+ rdataset = ISC_LIST_NEXT(rdataset, link))
+ if (rdataset->type == qtype)
+ break;
+ break;
+ }
+ if (rdataset != NULL) {
+ ISC_LIST_UNLINK(msg->sections[section], name, link);
+ ISC_LIST_PREPEND(msg->sections[section], name, link);
+ ISC_LIST_UNLINK(name->list, rdataset, link);
+ ISC_LIST_PREPEND(name->list, rdataset, link);
+ rdataset->attributes |= DNS_RDATASETATTR_REQUIREDGLUE;
+ }
+}
+
/*
* Do the bulk of query processing for the current query of 'client'.
* If 'event' is non-NULL, we are returning from recursion and 'qtype'
@@ -2875,7 +2879,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
/*
* Add SOA. If the query was for a SOA record force the
* ttl to zero so that it is possible for clients to find
- * the containing zone of a arbitary name with a stub
+ * the containing zone of an arbitrary name with a stub
* resolver and not have it cached.
*/
if (qtype == dns_rdatatype_soa)
@@ -3338,6 +3342,16 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
*/
setup_query_sortlist(client);
+ /*
+ * If this is a referral and the answer to the question
+ * is in the glue sort it to the start of the additional
+ * section.
+ */
+ if (client->message->counts[DNS_SECTION_ANSWER] == 0 &&
+ client->message->rcode == dns_rcode_noerror &&
+ (qtype == dns_rdatatype_a || qtype == dns_rdatatype_aaaa))
+ answer_in_glue(client, qtype);
+
if (client->message->rcode == dns_rcode_nxdomain &&
client->view->auth_nxdomain == ISC_TRUE)
client->message->flags |= DNS_MESSAGEFLAG_AA;
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-28 01:05:32 +0000