_NETWORK_LAYER_FILTER

struct _NETWORK_LAYER_FILTER

{

         unsigned long m_dwUnionSelector;

       union

  {

                 IP_V4_FILTER m_IPv4;

   };

} 

This structure represents network layer (OSI-7) filter level.

m_dwUnionSelector

Specifies which of the union members below is valid. Currently only IP version 4 is supported and this field should be laways set to IPV4.

m_IPv4

IP version 4 filter