What software is winpcap?

Winpcap is a free, public network access system under the Windows platform; the purpose of developing the winpcap project is to provide win32 applications with the ability to access the bottom layer of the network. It is used for direct network programming under Windows systems.

The operating environment of this article: windows10 system, winpcap 4.1.3, thinkpad t480 computer.

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winpcap (windows packet capture) is a free, public network access system under the windows platform. The purpose of developing the winpcap project is to provide win32 applications with the ability to access the underlying network. It is used for direct network programming under Windows systems.

Features

Winpcap provides a powerful programming interface, which is easily transplanted between various operating systems and is also convenient for programmers to develop.

What kind of programs need to use Winpcap

Many different tools and software use Winpcap for network analysis, troubleshooting, network security monitoring, etc. Winpcap is particularly suitable for the following classic fields:

1. Network and protocol analysis

2. Network monitoring

3. Communication log recording

4. Traffic generators

5. User-level bridges and routing

6. Network Intrusion Detection System (NIDS)

7. Network scanning

8. The security tool

Winpcap cannot do some things. It does not rely on the host's protocols such as TCP/IP to send and receive data packets. This means that it cannot block and cannot handle communication data between programs on the same host. It can only "sniff" packets on the physical line. Therefore it does not work with traffic shapers, QoS scheduling, and personal firewalls.

Winpcap internal structure

Winpcap is a system for packet capture and analysis under the Win32 platform. Including a kernel-level packet filter, a low-level DLL (packet.dll) and an advanced system-independent DLL (Wpcap.dll)

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