From: Petr Špaček <petr.spacek@nic.cz>
Date: Wed, 11 Mar 2020 15:44:07 +0000 (+0100)
Subject: iterate: log IP address sending mismatching answers
X-Git-Tag: v5.1.0~26^2~15
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=36ec0bac2a5206dfd3008c375535f77c13c849b6;p=thirdparty%2Fknot-resolver.git

iterate: log IP address sending mismatching answers
---

diff --git a/lib/layer/iterate.c b/lib/layer/iterate.c
index 790b9e530..a4dcf136c 100644
--- a/lib/layer/iterate.c
+++ b/lib/layer/iterate.c
@@ -1032,7 +1032,12 @@ static int resolve(kr_layer_t *ctx, knot_pkt_t *pkt)
 		VERBOSE_MSG("<= malformed response\n");
 		return resolve_badmsg(pkt, req, query);
 	} else if (!is_paired_to_query(pkt, query)) {
-		VERBOSE_MSG("<= ignoring mismatching response\n");
+		WITH_VERBOSE(query) {
+			const char *ns_str =
+				req->upstream.addr ? kr_straddr(req->upstream.addr) : "(internal)";
+			VERBOSE_MSG("<= ignoring mismatching response from %s\n",
+					ns_str ? ns_str : "(kr_straddr failed)");
+		}
 		/* Force TCP, to work around authoritatives messing up question
 		 * without yielding to spoofed responses. */
 		query->flags.TCP = true;