From: Daniel Salzman <daniel.salzman@nic.cz>
Date: Sat, 11 Apr 2020 15:12:14 +0000 (+0200)
Subject: ddns: return SERVFAIL to updates over XDP (not supported)
X-Git-Tag: embedded_lmdb~35^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb6f385390fd8d2ce3955fc0bb899dd334732cca;p=thirdparty%2Fknot-dns.git

ddns: return SERVFAIL to updates over XDP (not supported)
---

diff --git a/src/knot/nameserver/update.c b/src/knot/nameserver/update.c
index 51cfa3a06a..a208a24b51 100644
--- a/src/knot/nameserver/update.c
+++ b/src/knot/nameserver/update.c
@@ -1,4 +1,4 @@
-/*  Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+/*  Copyright (C) 2020 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -77,6 +77,12 @@ static int update_enqueue(zone_t *zone, knotd_qdata_t *qdata)
 
 int update_process_query(knot_pkt_t *pkt, knotd_qdata_t *qdata)
 {
+	/* DDNS over XDP not supported. */
+	if (qdata->params->xdp_msg != NULL) {
+		qdata->rcode = KNOT_RCODE_SERVFAIL;
+		return KNOT_STATE_FAIL;
+	}
+
 	/* RFC1996 require SOA question. */
 	NS_NEED_QTYPE(qdata, KNOT_RRTYPE_SOA, KNOT_RCODE_FORMERR);