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Code Issues Releases Wiki Activity

1773. [bug] Fast retry on host / net unreachable. [RT #13153]

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This commit is contained in:
Mark Andrews 2004-12-03 01:59:28 +00:00
parent cf74c9cc6a
commit c202b9f4dd
2 changed files with 72 additions and 17 deletions
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2
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@ -16,7 +16,7 @@
1774. [port] Aix: Silence compiler warnings / build failures.
[RT #13154]
1773. [placeholder] rt13153
1773. [bug] Fast retry on host / net unreachable. [RT #13153]
1772. [placeholder]

87
lib/dns/resolver.c
View File

@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: resolver.c,v 1.298 2004/11/10 21:57:46 marka Exp $ */
/* $Id: resolver.c,v 1.299 2004/12/03 01:59:28 marka Exp $ */
#include <config.h>
@ -762,6 +762,9 @@ static void
resquery_senddone(isc_task_t *task, isc_event_t *event) {
isc_socketevent_t *sevent = (isc_socketevent_t *)event;
resquery_t *query = event->ev_arg;
isc_boolean_t retry = ISC_FALSE;
isc_result_t result;
fetchctx_t *fctx;
REQUIRE(event->ev_type == ISC_SOCKEVENT_SENDDONE);
@ -780,6 +783,7 @@ resquery_senddone(isc_task_t *task, isc_event_t *event) {
INSIST(RESQUERY_SENDING(query));
query->sends--;
fctx = query->fctx;
if (RESQUERY_CANCELED(query)) {
if (query->sends == 0) {
@ -791,16 +795,43 @@ resquery_senddone(isc_task_t *task, isc_event_t *event) {
isc_socket_detach(&query->tcpsocket);
resquery_destroy(&query);
}
} else if (sevent->result == ISC_R_HOSTUNREACH ||
sevent->result == ISC_R_NETUNREACH)
/*
* No route to remote.
*/
fctx_cancelquery(&query, NULL, NULL, ISC_TRUE);
else if (sevent->result != ISC_R_SUCCESS)
fctx_cancelquery(&query, NULL, NULL, ISC_FALSE);
} else
switch (sevent->result) {
case ISC_R_SUCCESS:
break;
case ISC_R_HOSTUNREACH:
case ISC_R_NETUNREACH:
case ISC_R_NOPERM:
case ISC_R_ADDRNOTAVAIL:
case ISC_R_CONNREFUSED:
/*
* No route to remote.
*/
fctx_cancelquery(&query, NULL, NULL, ISC_TRUE);
retry = ISC_TRUE;
break;
default:
fctx_cancelquery(&query, NULL, NULL, ISC_FALSE);
break;
}
isc_event_free(&event);
if (retry) {
/*
* Behave as if the idle timer has expired. For TCP
* this may not actually reflect the latest timer.
*/
fctx->attributes &= ~FCTX_ATTR_ADDRWAIT;
result = fctx_stopidletimer(fctx);
if (result != ISC_R_SUCCESS)
fctx_done(fctx, result);
else
fctx_try(fctx);
}
}
static inline isc_result_t
@ -1317,7 +1348,10 @@ static void
resquery_connected(isc_task_t *task, isc_event_t *event) {
isc_socketevent_t *sevent = (isc_socketevent_t *)event;
resquery_t *query = event->ev_arg;
isc_boolean_t retry = ISC_FALSE;
isc_result_t result;
unsigned int attrs;
fetchctx_t *fctx;
REQUIRE(event->ev_type == ISC_SOCKEVENT_CONNECT);
REQUIRE(VALID_QUERY(query));
@ -1335,6 +1369,7 @@ resquery_connected(isc_task_t *task, isc_event_t *event) {
*/
query->connects--;
fctx = query->fctx;
if (RESQUERY_CANCELED(query)) {
/*
@ -1344,9 +1379,8 @@ resquery_connected(isc_task_t *task, isc_event_t *event) {
isc_socket_detach(&query->tcpsocket);
resquery_destroy(&query);
} else {
if (sevent->result == ISC_R_SUCCESS) {
unsigned int attrs;
switch (sevent->result) {
case ISC_R_SUCCESS:
/*
* We are connected. Create a dispatcher and
* send the query.
@ -1379,25 +1413,46 @@ resquery_connected(isc_task_t *task, isc_event_t *event) {
result = resquery_send(query);
if (result != ISC_R_SUCCESS) {
fetchctx_t *fctx = query->fctx;
fctx_cancelquery(&query, NULL, NULL,
ISC_FALSE);
fctx_done(fctx, result);
}
} else if (sevent->result == ISC_R_HOSTUNREACH ||
sevent->result == ISC_R_NETUNREACH) {
break;
case ISC_R_NETUNREACH:
case ISC_R_HOSTUNREACH:
case ISC_R_CONNREFUSED:
case ISC_R_NOPERM:
case ISC_R_ADDRNOTAVAIL:
/*
* No route to remote.
*/
isc_socket_detach(&query->tcpsocket);
fctx_cancelquery(&query, NULL, NULL, ISC_TRUE);
} else {
retry = ISC_TRUE;
break;
default:
isc_socket_detach(&query->tcpsocket);
fctx_cancelquery(&query, NULL, NULL, ISC_FALSE);
break;
}
}
isc_event_free(&event);
if (retry) {
/*
* Behave as if the idle timer has expired. For TCP
* connections this may not actually reflect the latest timer.
*/
fctx->attributes &= ~FCTX_ATTR_ADDRWAIT;
result = fctx_stopidletimer(fctx);
if (result != ISC_R_SUCCESS)
fctx_done(fctx, result);
else
fctx_try(fctx);
}
}
static void