+			echo "ERROR: failed to test udp $ns1 to $ns2 with dnat rule step $i, result: \"$result\"" 1>&2
+		echo "ERROR: in and output file mismatch when checking $msg" 1>&1
WARNING: line length of 118 exceeds 80 columns
WARNING: line length of 125 exceeds 80 columns
WARNING: line length of 147 exceeds 80 columns
WARNING: line length of 81 exceeds 80 columns