upstream/bind9
1
0
Fork 0
mirror of https://github.com/isc-projects/bind9.git synced 2026-06-11 13:50:00 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

After N restarts (currently 3) try again with EDNS0 disabled.

Browse source
This commit is contained in:
Michael Graff 2000-06-26 21:07:36 +00:00
parent e1e309c63d
commit 57ebb859ee
1 changed files with 12 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
lib/dns/resolver.c
View file

@ -15,7 +15,7 @@
* SOFTWARE.
*/
/* $Id: resolver.c,v 1.137 2000/06/22 21:54:46 tale Exp $ */
/* $Id: resolver.c,v 1.138 2000/06/26 21:07:36 explorer Exp $ */
#include <config.h>
@ -91,6 +91,12 @@
*/
#define SEND_BUFFER_SIZE 2048 /* XXXRTH Constant. */
/*
* This defines the maximum number of restarts we will permit before we
* disable EDNS0 on the query.
*/
#define NOEDNS0_RESTARTS 3
typedef struct fetchctx fetchctx_t;
typedef struct query {
@ -865,6 +871,11 @@ resquery_send(resquery_t *query) {
* Use EDNS0, unless the caller doesn't want it, or we know that
* the remote server doesn't like it.
*/
if (fctx->restarts > NOEDNS0_RESTARTS) {
query->options |= DNS_FETCHOPT_NOEDNS0;
FCTXTRACE("Too many restarts, disabling EDNS0");
}
if ((query->options & DNS_FETCHOPT_NOEDNS0) == 0) {
if ((query->addrinfo->flags & DNS_FETCHOPT_NOEDNS0) == 0) {
result = fctx_addopt(fctx->qmessage);