Implementation of Packet Capture Algorithm Based on WinPcap

The network has become a key ingredient of our lives,and people are more and more paying attention to the security problems of the network information. Through the packet-based network protocol analysis,you can capture the data packets transmission on the network, and get the illegal information. It is conducive to the research of network forensics. WinPcap is a Windows API to provide access to the underlying network data in the Windows system; it is not a pure C++ solution,it relies on the use of local libraries. With the help of network packet capture library providing by the WinPcap,using c++ programming implements data packet capture and filtering algorithms.