Introduction to libpcap
libpcap is an open source C-language library for capturing network packets. libpcap is available for a number of different platforms, including most Unix and Unix-like platforms (such as Linux and BSD), as well as for Windows.
Although libpcap is primarily a packet-capturing tool, it also can create and manipulate packets from saved files, which can then be used in the wide variety of tools that support the libpcap format.
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