karan9123 / packet-analyzer

PCAP Packet analyzer written in Rust.

PCAP Analyzer

A rust implementation of a packet capture analyzer, built from scratch without relying on external libraries. This program parses pcap files and prints information about the Ethernet header, IP header, and header data of TCP, UDP, or ICMP packets.

Getting Started

To run the PCAP analyzer program, you need to have Rust installed on your system.

Move into the folder:

$ cd packet_analyzer

Build using cargo

/packet_analyzer $ cargo build

Usage

To analyze a pcap file, run the following command:

$ cargo run -r [filename]

To filter the packets while analyzing, use the following command:

$ cargo run -r [filename] [filter]

Filters

The following filters are supported for packet analysis:

• host
• port
• ip
• icmp
• tcp
• udp
• net

Example

To analyze the test.pcap file and filter the packets based on the TCP protocol, run the following command:

$ cargo run -r test.pcap tcp

This command will parse the test.pcap file, print information about the Ethernet header, IP header, and header data of TCP packets, and display only the filtered results based on the TCP protocol.