QUIC requestor: nitpicks

src/knot/query/quic-requestor.c

@@ -40,11 +40,9 @@ static int quic_exchange(knot_xquic_conn_t *conn, knot_quic_reply_t *r, int time
 	}
 
 	ret = net_dgram_recv(fd, r->in_payload->iov_base, QUIC_BUF_SIZE, timeout_ms);
-	if (ret <= 0) {
-		r->in_payload->iov_len = 0; // TODO needed?
-		if (ret == 0) {
-			return KNOT_ECONN;
-		}
+	if (ret == 0) {
+		return KNOT_ECONN;
+	} else if (ret < 0) {
 		return ret;
 	}
 	r->in_payload->iov_len = ret;
@@ -114,7 +112,7 @@ struct knot_quic_reply *knot_qreq_connect(int fd, struct sockaddr_storage *rem_a
 		return NULL;
 	}
 
-	knot_xquic_table_t *table = knot_xquic_table_new(1, QUIC_BUF_SIZE, QUIC_BUF_SIZE, 1232 /* FIXME */, creds); // NOTE the limits on conns and buffers do not do anything since we do not sweep
+	knot_xquic_table_t *table = knot_xquic_table_new(1, QUIC_BUF_SIZE, QUIC_BUF_SIZE, 0, creds); // NOTE the limits on conns and buffers do not do anything since we do not sweep
 	if (table == NULL) {
 		knot_xquic_free_creds(creds);
 		free(r);

src/knot/query/requestor.c

@@ -87,7 +87,7 @@ static int request_ensure_connected(knot_request_t *request, bool *reused_fd, in
 		                                      request->quic_cert, timeout_ms);
 		if (request->quic_ctx == NULL) {
 			close(request->fd);
-			return KNOT_EUNREACH; // FIXME correct code?
+			return KNOT_ECONN;
 		}
 #else
 		assert(0);

src/libknot/xdp/quic.c

@@ -650,7 +650,9 @@ static int conn_new(ngtcp2_conn **pconn, const ngtcp2_path *path, const ngtcp2_c
 	ngtcp2_settings_default(&settings);
 	settings.initial_ts = now;
 	settings.log_printf = user_printf;
-	settings.max_tx_udp_payload_size = udp_pl;
+	if (udp_pl != 0) {
+		settings.max_tx_udp_payload_size = udp_pl;
+	}
 	settings.qlog.odcid = *odcid;
 	settings.handshake_timeout = idle_timeout_ns; // NOTE setting handshake timeout to idle_timeout for simplicity
 	settings.no_pmtud = true;