数据包截获与分析是网路管理中的基本技术，本文深入研究了国外优秀的数据包捕获函数库

Libpcap。介绍了用于用户层数据包截获的系统独立的api接口Libpcap库，给出了利用BPF和Libpcap设计基于包

捕获的应用程序的应用框架。

-Packet interception and analysis is the basic network management technology, this in-depth study of foreign outstanding packet capture library Libpcap. Introduced for user-level packet interception system independent of the api interface Libpcap library, given the use of BPF and Libpcap design is based on packet capture application framework applications.