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2383. [bug] named could double queries when they resulted in

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SERVFAIL due to overkilling EDNS0 failure detection.
This commit is contained in:
Tatuya JINMEI 神明達哉 2008-06-17 22:35:08 +00:00
parent 072440df4f
commit 0f39ff74a8
2 changed files with 12 additions and 4 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
2383. [bug] named could double queries when they resulted in
SERVFAIL due to overkilling EDNS0 failure detection.
2382. [doc] Add descriptions of DHCID, IPSECKEY, SPF and SSHFP
to ARM.

13
lib/dns/resolver.c
View File

@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: resolver.c,v 1.371 2008/05/29 04:46:32 marka Exp $ */
/* $Id: resolver.c,v 1.372 2008/06/17 22:35:08 jinmei Exp $ */
/*! \file */
@ -5843,12 +5843,17 @@ resquery_response(isc_task_t *task, isc_event_t *event) {
*/
if (message->rcode != dns_rcode_noerror &&
message->rcode != dns_rcode_nxdomain) {
if ((message->rcode == dns_rcode_formerr ||
message->rcode == dns_rcode_notimp ||
message->rcode == dns_rcode_servfail) &&
if (((message->rcode == dns_rcode_formerr ||
message->rcode == dns_rcode_notimp) ||
(message->rcode == dns_rcode_servfail &&
dns_message_getopt(message) == NULL)) &&
(query->options & DNS_FETCHOPT_NOEDNS0) == 0) {
/*
* It's very likely they don't like EDNS0.
* If the response code is SERVFAIL, also check if the
* response contains an OPT RR and don't cache the
* failure since it can be returned for various other
* reasons.
*
* XXXRTH We should check if the question
* we're asking requires EDNS0, and