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Shipped

2026

Enterprise DPI Engine

#Java#Networking#DPI#Zero-Copy#Concurrency

Live System

EN

Project Overview

Overview

Enterprise DPI Engine is a Java-based deep packet inspection system focused on low-latency packet parsing and TLS Server Name Indication filtering.

Performance-Oriented Design

Zero-Allocation Hot Path: A flyweight PacketCursor walks ByteBuffer data without allocating per packet.
Zero-Copy I/O: PCAP input is read through memory-mapped files using FileChannel.map.
Flow-Affinity Dispatching: Consistent hashing on the network 5-tuple sends packets from the same connection to the same worker thread.
TCP Stream Reassembly: Out-of-order segments are buffered in bounded thread-local state until the TLS Client Hello can be inspected.
SNI Filtering: The engine extracts TLS SNI domains and applies rule-based filtering before writing allowed packets back to PCAP.

Benchmarking Story

The engine is designed to demonstrate JVM systems knowledge: allocation pressure, GC avoidance, non-blocking file access, worker orchestration, and profiler-friendly performance analysis with Java Flight Recorder.

Deployment & Repos

Tech Stack

JavaNIOByteBufferMemory-Mapped FilesTCPTLSSNIJFRConcurrency

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