[Feature] Add Support for PCAP Files

[TheSC4]

Description

I would like to request a new feature to be added to the network sniffer project: support for analyzing traffic from PCAP files.

Proposed Solution

Add the capability to read and analyze traffic from PCAP files. Users should be able to provide a PCAP file as input, and the tool should process and display the network traffic data contained within the file. This feature should include:

• File Input: Allow users to specify a PCAP file as an input parameter.
• Traffic Analysis: Parse and analyze the traffic data from the PCAP file, similar to how live traffic is currently handled.
• Output Display: Display the parsed traffic data in the same format as live traffic, including packet details and protocol information.

Alternatives Considered

Currently, the tool only supports live traffic capture. Users need to use separate tools to analyze PCAP files, which is less efficient and requires additional steps.

Additional Context

Adding support for PCAP files will enhance the usability of the network sniffer by allowing users to analyze historical network data. This feature is particularly useful for investigating past network events and conducting detailed offline analysis.