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RT #927 fix from Bob:

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759.   [bug]           The resolver didn't turn off "avoid fetches" mode
                        when restarting, possibly causing resolution
                        to fail when it should not.  This bug only affected
                        platforms which support both IPv4 and IPv6. [RT #927]

 758.   [bug]           The "avoid fetches" code did not treat negative
                        cache entries correctly, causing fetches that would
                        be useful to be avoided.  This bug only affected
                        platforms which support both IPv4 and IPv6. [RT #927]
This commit is contained in:
Andreas Gustafsson
2001-02-28 20:51:22 +00:00
parent 088a25086a
commit d1cc210d20
4 changed files with 40 additions and 8 deletions
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11
lib/dns/adb.c
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@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: adb.c,v 1.170 2001/02/09 00:13:52 gson Exp $ */
/* $Id: adb.c,v 1.171 2001/02/28 20:51:22 gson Exp $ */
/*
* Implementation notes
@@ -2396,7 +2396,7 @@ dns_adb_createfind(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
dns_adbfind_t *find;
dns_adbname_t *adbname;
int bucket;
isc_boolean_t want_event, start_at_root, alias;
isc_boolean_t want_event, start_at_root, alias, have_address;
isc_result_t result;
unsigned int wanted_addresses;
unsigned int wanted_fetches;
@@ -2628,8 +2628,13 @@ dns_adb_createfind(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
}
fetch:
if ((WANT_INET(wanted_addresses) && NAME_HAS_V4(adbname)) ||
(WANT_INET6(wanted_addresses) && NAME_HAS_V6(adbname)))
have_address = ISC_TRUE;
else
have_address = ISC_FALSE;
if (wanted_fetches != 0 &&
(!FIND_AVOIDFETCHES(find) || wanted_addresses == wanted_fetches)) {
! (FIND_AVOIDFETCHES(find) && have_address)) {
/*
* We're missing at least one address family. Either the
* caller hasn't instructed us to avoid fetches, or we don't