_TRANSPORT_LAYER_FILTER

struct _TRANSPORT_LAYER_FILTER

{

     unsigned long m_dwUnionSelector;

       union

  {

                 TCPUDP_FILTER m_TcpUdp;

        };

} 

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

m_dwUnionSelector

Specifies which of the union members below is valid. Currently only TCP and UDP are supported and this field should be laways set to TCPUDP.

m_TcpUdp

TCP/UDP port filter