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What is wpcap.dll?


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Windows Process Description:

WinPcap is architecture for packet captures and network analysis for the Win32 platforms, based on the model of BPF and libpcap for UNIX. It includes a kernel-level packet filter driver, a low-level dynamic link library, the packet.dll module, and a high-level and system-independent library the wpcap.dll file. WinPcap is known in the computing industry as a standard tool for link-layer network access in Windows environments.

The wpcap.dll module allows applications to capture and transmit network packets bypassing the protocol stack. The program design consists of a driver that extends the operating system to provide low-level network access, and the wpcap.dll module that is used to easily access the low-level network layers. The wpcap.dll file also contains the Windows version of the well known libpcap Unix API.

Inclusive of the wpcap.dll file functions is to implement the libpcap API plus some extensions for Win32 systems, the packet.dll file. The file also supports these drivers for various Win32 operating systems and provides a Win32-specific raw link-layer packet access mechanism.

The wpcap.dll module enables WinPcap to function as a packet capture and filtering engine of many open source and commercial network tools. These network tools include protocol analyzers, network monitors, network intrusion detection systems, sniffers, traffic generators and network testers. Other tools, like Wireshark, Nmap, Snort, and ntop are known and used throughout the networking community.

Applications tasked to capture packets on a network without themselves having to capture differently on different OSes calls on the wpcap.dll module to provide an API that should work on BSD, Linux, Solaris, HP-UX, Irix, AIX, Windows 9x, Windows NT, etc.

WinPcap ships a set of functions in harmony with libpcap 0.5.2 utilizing the facilities of the wpcap.dll application. The module permits capturing packets that are totally independent from the underlying network hardware and operating system.

Author: Microsoft Corporation

Author URL:

Part Of: WinPcap Applications

Memory Usage: Low

Associated Applications: packet.dll, libcap.dll

Background DLL: Yes

Uses Network: No

Hardware Related: No

Common Path: C:\ Windows\ system32\ wpcap.dll

DLL Version:

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