resolved: add reference to negative caching RFC

2015-08-21 22:47:06 +02:00
parent ef7051360a
commit 0a18f3e59f
1 changed files with 4 additions and 0 deletions
@@ -458,6 +458,10 @@ int dns_cache_put(
                if (r > 0)
                        continue;

+                /* See https://tools.ietf.org/html/rfc2308, which
+                 * say that a matching SOA record in the packet
+                 * is used to to enable negative caching. */
+
                r = dns_answer_find_soa(answer, q->keys[i], &soa);
                if (r < 0)
                        goto fail;