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If IXFR fails, fall back to AXFR

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This commit is contained in:
Andreas Gustafsson
2001-05-10 17:51:49 +00:00
parent e5a9067ab2
commit a9ef485446
4 changed files with 26 additions and 9 deletions
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5
lib/dns/include/dns/result.h
View File

@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: result.h,v 1.80 2001/03/07 20:53:31 bwelling Exp $ */
/* $Id: result.h,v 1.81 2001/05/10 17:51:49 gson Exp $ */
#ifndef DNS_RESULT_H
#define DNS_RESULT_H 1
@@ -113,8 +113,9 @@
#define DNS_R_NOMASTERFILE (ISC_RESULTCLASS_DNS + 74)
#define DNS_R_UNKNOWNPROTO (ISC_RESULTCLASS_DNS + 75)
#define DNS_R_CLOCKSKEW (ISC_RESULTCLASS_DNS + 76)
#define DNS_R_BADIXFR (ISC_RESULTCLASS_DNS + 77)
#define DNS_R_NRESULTS 77 /* Number of results */
#define DNS_R_NRESULTS 78 /* Number of results */
/*
* DNS wire format rcodes.

5
lib/dns/result.c
View File

@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: result.c,v 1.88 2001/03/07 20:53:27 bwelling Exp $ */
/* $Id: result.c,v 1.89 2001/05/10 17:51:48 gson Exp $ */
#include <config.h>
@@ -117,7 +117,8 @@ static const char *text[DNS_R_NRESULTS] = {
"no master file configured", /* 74 DNS_R_NOMASTERFILE */
"unknown protocol", /* 75 DNS_R_UNKNOWNPROTO */
"clocks are unsynchronized" /* 76 DNS_R_CLOCKSKEW */
"clocks are unsynchronized", /* 76 DNS_R_CLOCKSKEW */
"IXFR failed" /* 77 DNS_R_BADIXFR */
};
static const char *rcode_text[DNS_R_NRCODERESULTS] = {

8
lib/dns/xfrin.c
View File

@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: xfrin.c,v 1.117 2001/05/10 16:27:14 gson Exp $ */
/* $Id: xfrin.c,v 1.118 2001/05/10 17:51:44 gson Exp $ */
#include <config.h>
@@ -653,6 +653,9 @@ xfrin_fail(dns_xfrin_ctx_t *xfr, isc_result_t result, const char *msg) {
if (result != DNS_R_UPTODATE) {
xfrin_log(xfr, ISC_LOG_ERROR, "%s: %s",
msg, isc_result_totext(result));
if (xfr->is_ixfr)
/* Pass special result code to force AXFR retry */
result = DNS_R_BADIXFR;
}
xfrin_cancelio(xfr);
if (xfr->done != NULL) {
@@ -731,8 +734,7 @@ xfrin_create(isc_mem_t *mctx,
xfr->lasttsig = NULL;
xfr->tsigctx = NULL;
xfr->sincetsig = 0;
/* is_ixfr */
xfr->is_ixfr = ISC_FALSE;
/* ixfr.request_serial */
/* ixfr.end_serial */

17
lib/dns/zone.c
View File

@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: zone.c,v 1.322 2001/05/09 05:20:28 marka Exp $ */
/* $Id: zone.c,v 1.323 2001/05/10 17:51:46 gson Exp $ */
#include <config.h>
@@ -251,6 +251,7 @@ struct dns_zone {
#define DNS_ZONEFLG_DIALNOTIFY 0x00020000U
#define DNS_ZONEFLG_DIALREFRESH 0x00040000U
#define DNS_ZONEFLG_SHUTDOWN 0x00080000U
#define DNS_ZONEFLAG_NOIXFR 0x00100000U /* IXFR failed, force AXFR */
#define DNS_ZONE_OPTION(z,o) (((z)->options & (o)) != 0)
@@ -4719,6 +4720,11 @@ zone_xfrdone(dns_zone_t *zone, isc_result_t result) {
break;
case DNS_R_BADIXFR:
/* Force retry with AXFR. */
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLAG_NOIXFR);
goto same_master;
default:
zone->curmaster++;
same_master:
@@ -4900,6 +4906,14 @@ got_transfer_quota(isc_task_t *task, isc_event_t *event) {
"forced reload, requesting AXFR of "
"initial version from %s", mastertext);
xfrtype = dns_rdatatype_axfr;
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLAG_NOIXFR)) {
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"retrying with AXFR from %s due to "
"previous IXFR failure", mastertext);
xfrtype = dns_rdatatype_axfr;
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLAG_NOIXFR);
UNLOCK_ZONE(zone);
} else {
isc_boolean_t use_ixfr = ISC_TRUE;
if (peer != NULL &&
@@ -4967,7 +4981,6 @@ got_transfer_quota(isc_task_t *task, isc_event_t *event) {
dns_zone_detach(&zone); /* XXXAG */
return;
}
/*