Packet forgery and sending system based on WinPcap

In order to satisfy the need of the hidden information in network communication, a UDP packet system that can falsify and send the data is designed based on WinPcap. This system is realized by the network packet encapsulation and the transmission process, then through accessing a forged packet based on custom parameters, finally end with the sending packets process by WinPcap. This system is written in Visual C++ 6.0. Testing result shows that the forged UDP packet can be send successfully to the destination host in a variety of network environment, the forged data packet can be sent by WinPcap.