From: Štěpán Balážik <stepan.balazik@nic.cz>
Date: Fri, 16 Oct 2020 10:39:12 +0000 (+0200)
Subject: selection: avoid chicken and egg problem when resolving . DS
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dce44e02abf8ea8646d36794f9f2257eb73fadd9;p=thirdparty%2Fknot-resolver.git

selection: avoid chicken and egg problem when resolving . DS
---

diff --git a/lib/selection_iter.c b/lib/selection_iter.c
index 53e0f5fd8..d651ed760 100644
--- a/lib/selection_iter.c
+++ b/lib/selection_iter.c
@@ -235,6 +235,11 @@ void iter_choose_transport(struct kr_query *qry, struct kr_transport **transport
 		}
 	}
 
+	// . DNSKEY must be fetched from root hints, no A/AAAA resolution is possible.
+	if (qry->sname[0] == '\0' && qry->stype == KNOT_RRTYPE_DNSKEY) {
+		num_to_resolve = 0;
+	}
+
 	trie_it_free(it);
 
 	if (valid_addresses || num_to_resolve) {