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Deal with negative cache responses when using dns_db_findrdataset().

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This commit is contained in:
Bob Halley
1999-11-03 20:20:38 +00:00
parent 307fed93c4
commit 83ffabbfe1
1 changed files with 21 additions and 0 deletions
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bin/named/query.c
+21
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@@ -800,6 +800,15 @@ query_addadditional(void *arg, dns_name_t *name, dns_rdatatype_t qtype) {
dns_rdatatype_a, 0,
client->now, rdataset,
sigrdataset);
if (result == DNS_R_NCACHENXDOMAIN)
goto addname;
if (result == DNS_R_NCACHENXRRSET) {
dns_rdataset_disassociate(rdataset);
/*
* Negative cache entries don't have sigrdatasets.
*/
INSIST(sigrdataset->methods == NULL);
}
if (zdb != NULL && result == ISC_R_NOTFOUND) {
/*
* The cache doesn't have an A, but we may have
@@ -838,6 +847,12 @@ query_addadditional(void *arg, dns_name_t *name, dns_rdatatype_t qtype) {
dns_rdatatype_a6, 0,
client->now, rdataset,
sigrdataset);
if (result == DNS_R_NCACHENXDOMAIN)
goto addname;
if (result == DNS_R_NCACHENXRRSET) {
dns_rdataset_disassociate(rdataset);
INSIST(sigrdataset->methods == NULL);
}
if (zdb != NULL && result == ISC_R_NOTFOUND) {
/*
* The cache doesn't have an A6, but we may have
@@ -877,6 +892,12 @@ query_addadditional(void *arg, dns_name_t *name, dns_rdatatype_t qtype) {
dns_rdatatype_aaaa, 0,
client->now, rdataset,
sigrdataset);
if (result == DNS_R_NCACHENXDOMAIN)
goto addname;
if (result == DNS_R_NCACHENXRRSET) {
dns_rdataset_disassociate(rdataset);
INSIST(sigrdataset->methods == NULL);
}
if (zdb != NULL && result == ISC_R_NOTFOUND) {
/*
* The cache doesn't have an AAAA, but we may have