fix socketcan bugs

socketcan/socketcan.go

@@ -144,6 +144,8 @@ func (sck *CanSocket) Send(msg *can.Frame) error {
 		idToWrite |= unix.CAN_RTR_FLAG
 	case can.CanErrFrame:
 		return errors.New("you can't send error frames")
+	case can.CanDataFrame:
+
 	default:
 		return errors.New("unknown frame type")
 	}

socketcan/socketcan_test.go

@@ -51,7 +51,7 @@ func TestCanSocket(t *testing.T) {
 		err := sock.Send(testFrame)
 
 		if err != nil {
-			t.Error(err)
+			t.Fatal(err)
 		}
 	})