libvirt/tests/nwfilterxml2xmlout/icmp-direction3-test.xml

<filter name='testcase' chain='root'>
  <uuid>d6b1a2af-def6-2898-9f8d-4a74e3c39558</uuid>
  <rule action='accept' direction='out' priority='500'>
    <icmp/>
  </rule>
  <rule action='drop' direction='inout' priority='600'>
    <all/>
  </rule>
</filter>