Fix RR Type AMTRELAY type nogateway to print a relay of '.', RFC8777.

diff --git a/host2str.c b/host2str.c
index 61dcece72dd063d8638cc5116ff331f92d9db8de..d0a20d42503fca01effb01b9410be7856e1311ba 100644 (file)
--- a/host2str.c
+++ b/host2str.c
@@ -1422,6 +1422,8 @@ ldns_rdf2buffer_str_amtrelay(ldns_buffer *output, const ldns_rdf *rdf)
                        precedence, discovery_optional, relay_type);
        if (relay)
                (void) ldns_rdf2buffer_str(output, relay);
+       else
+               ldns_buffer_printf(output, ".");
 
        ldns_rdf_deep_free(relay);
        return ldns_buffer_status(output);