Firstly, The paper introduces the principle of sniffer technology to capture data packets, illustrates the structure and functions of libpcap library and winpcap(the windows version of libpcap) based on BPF and presents the design of packet capture class.
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- 首先，本文介紹了用于數據包捕獲的網(wǎng)絡(luò )嗅探技術(shù)的工作原理，在給出BSD數據包過(guò)濾器(BPF)的基礎上，對實(shí)現sniffer的libpcap庫函數及winpcap(libpcap的windows版本)的框架和使用作了詳細介紹，并給出應用winpcap實(shí)現數據包獲取類(lèi)的設計。
