resolve: do not hit CNAME or DNAME entry in NODATA cache (#9836)
Fixes #9833.
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@ -783,7 +783,7 @@ static DnsCacheItem *dns_cache_get_by_key_follow_cname_dname_nsec(DnsCache *c, D
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if (dns_type_may_redirect(k->type)) {
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/* Check if we have a CNAME record instead */
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i = hashmap_get(c->by_key, &DNS_RESOURCE_KEY_CONST(k->class, DNS_TYPE_CNAME, n));
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if (i)
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if (i && i->type != DNS_CACHE_NODATA)
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return i;
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/* OK, let's look for cached DNAME records. */
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@ -792,7 +792,7 @@ static DnsCacheItem *dns_cache_get_by_key_follow_cname_dname_nsec(DnsCache *c, D
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return NULL;
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i = hashmap_get(c->by_key, &DNS_RESOURCE_KEY_CONST(k->class, DNS_TYPE_DNAME, n));
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if (i)
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if (i && i->type != DNS_CACHE_NODATA)
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return i;
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/* Jump one label ahead */
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