pcap4j

Supports essential protocols like Ethernet, IPv4/IPv6, TCP, UDP, and ICMP, enabling detailed packet crafting and analysis as listed in the Features section.

All built-in packet classes are serializable and practically immutable, ensuring safe concurrent access in Java applications.

Allows adding custom protocol support without modifying the core library, facilitating adaptation to specialized network needs.

Reads from and writes to pcap-formatted files (e.g., Wireshark captures), enabling seamless integration with existing network analysis tools.