Skid_steer_drive_controller output an opposite direction

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After receiving a geometry_msg in a +x direction, but my robot run with its -x direction.(each x direction of links are the same in my robot).

My skid_steer_drive_controller config is

<gazebo>
  <plugin name="skid_steer_drive_controller" filename="libgazebo_ros_skid_steer_drive.so">
    <updateRate>100</updateRate>
    <robotNamespace>/</robotNamespace>
    <leftFrontJoint>f_Lwheel_j</leftFrontJoint>
    <rightFrontJoint>f_Rwheel_j</rightFrontJoint>
    <leftRearJoint>r_Lwheel_j</leftRearJoint>
    <rightRearJoint>r_Rwheel_j</rightRearJoint>
    <wheelSeparation>0.093</wheelSeparation>
    <wheelDiameter>0.04</wheelDiameter>
    <torque>3</torque>
    <commandTopic>cmd_vel</commandTopic>
    <odometryTopic>odom</odometryTopic>
    <odometryFrame>odom</odometryFrame>
    <publishOdom>true</publishOdom>
    <robotBaseFrame>base_footprint</robotBaseFrame>
    <broadcastTF>true</broadcastTF>
  </plugin>
</gazebo>

My urdf files is here

I guess this controller's direction is base the settings of leftFrontJoint, rightFrontJoint, leftRearJoint, rightRearJoint.

And I think my setup should be fine.... But the robot did run in an opposite direction.

So, I am wonder that how to fixed this issue, and what does skid_steer_drive_controller's direction actually depend on?

Thank you!