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resolve: do not hit CNAME or DNAME entry in NODATA cache (#9836)

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Fixes #9833.
This commit is contained in:
Yu Watanabe
2018-08-13 14:32:33 +09:00
committed by GitHub
parent 5d3bab79e8
commit 3740146a4c
1 changed files with 2 additions and 2 deletions
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4
src/resolve/resolved-dns-cache.c
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@@ -783,7 +783,7 @@ static DnsCacheItem *dns_cache_get_by_key_follow_cname_dname_nsec(DnsCache *c, D
if (dns_type_may_redirect(k->type)) {
/* Check if we have a CNAME record instead */
i = hashmap_get(c->by_key, &DNS_RESOURCE_KEY_CONST(k->class, DNS_TYPE_CNAME, n));
if (i)
if (i && i->type != DNS_CACHE_NODATA)
return i;
/* OK, let's look for cached DNAME records. */
@@ -792,7 +792,7 @@ static DnsCacheItem *dns_cache_get_by_key_follow_cname_dname_nsec(DnsCache *c, D
return NULL;
i = hashmap_get(c->by_key, &DNS_RESOURCE_KEY_CONST(k->class, DNS_TYPE_DNAME, n));
if (i)
if (i && i->type != DNS_CACHE_NODATA)
return i;
/* Jump one label ahead */