USB packet capture driver source.

包截获程序，使用底层驱动截获数据包，C-Packet capture program, the underlying driver intercepted packet, C++

windows网络防火墙，基于ndis实现，在xpassthru框架下进行包截获，包分析，包处理，可以自行添加其他功能-Windows network firewall based on NDIS packet capture, packet analysis, in the framework of the xpassthru, packet processing, can add additional functionality