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1206. [bug] SERVFAIL and NOTIMP responses to a EDNS should trigger

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a non-EDNS retry.
This commit is contained in:
Mark Andrews 2002-02-19 00:48:21 +00:00
parent 06b12bc497
commit c26c65b7a0
2 changed files with 25 additions and 20 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
1206. [bug] SERVFAIL and NOTIMP responses to a EDNS should trigger
a non-EDNS retry.
1205. [bug] OPT, TSIG and TKEY cannot be used to set the "class"
of the message. [RT #2449]

42
lib/dns/resolver.c
View File

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: resolver.c,v 1.237 2002/02/05 19:44:55 bwelling Exp $ */
/* $Id: resolver.c,v 1.238 2002/02/19 00:48:21 marka Exp $ */
#include <config.h>
@ -4297,25 +4297,27 @@ 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) {
if ((query->options & DNS_FETCHOPT_NOEDNS0) == 0) {
/*
* It's very likely they don't like EDNS0.
*
* XXXRTH We should check if the question
* we're asking requires EDNS0, and
* if so, we should bail out.
*/
options |= DNS_FETCHOPT_NOEDNS0;
resend = ISC_TRUE;
/*
* Remember that they don't like EDNS0.
*/
dns_adb_changeflags(fctx->adb,
query->addrinfo,
DNS_FETCHOPT_NOEDNS0,
DNS_FETCHOPT_NOEDNS0);
} else if (ISFORWARDER(query->addrinfo)) {
if ((message->rcode == dns_rcode_formerr ||
message->rcode == dns_rcode_notimp ||
message->rcode == dns_rcode_servfail) &&
(query->options & DNS_FETCHOPT_NOEDNS0) == 0) {
/*
* It's very likely they don't like EDNS0.
*
* XXXRTH We should check if the question
* we're asking requires EDNS0, and
* if so, we should bail out.
*/
options |= DNS_FETCHOPT_NOEDNS0;
resend = ISC_TRUE;
/*
* Remember that they don't like EDNS0.
*/
dns_adb_changeflags(fctx->adb, query->addrinfo,
DNS_FETCHOPT_NOEDNS0,
DNS_FETCHOPT_NOEDNS0);
} else if (message->rcode == dns_rcode_formerr) {
if (ISFORWARDER(query->addrinfo)) {
/*
* This forwarder doesn't understand us,
* but other forwarders might. Keep trying.