一个高性能的网络数据包处理架构，利用WinpkFilter可以在应用层直接对数据包进行处理，甚至可以在应用层延缓数据包发送-WinpkFilter is a high performance packet filtering framework for Windows that allows developers to transparently filter (view and modify) raw network packets with minimal impact on network

上位机与pci9054通讯，此例中为上位机发送数据包给pci9054,用DMA传输方式-Pci9054 communicate with the host computer, in this case to send data to the host computer contracted pci9054, using DMA transfer mode

此例为上位机接受从PCI9054中dma方式发送过来的数据包，检测长度，字节数-This example from PCI9054 for PC accept dma to send packets, length, number of bytes