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P2P Video Streaming & Overlay Network Simulation

This project implements a Peer-to-Peer (P2P) video streaming application in Java using a custom overlay network simulated with Docker. It demonstrates traffic routing between isolated subnets, video synchronization, and GUI integration using VLCJ.

Features

  • P2P Video Streaming: Peers can stream video content to each other via RTSP/TCP.
  • Overlay Network: Simulates a realistic topology with 3 distinct subnets (172.20.x, 172.21.x, 172.22.x) and a central software router.
  • Custom Routing: Automated ip route configuration allows communication across isolated Docker networks.
  • GUI in Docker: Java Swing interface running inside containers, forwarded to the host machine via X11.

Requirements & Dependencies

To run this project, you need the following dependencies. The required JAR files are included in the lib/ folder:

  • Java 17 (Eclipse Temurin)
  • Docker & Docker Compose
  • VLCJ Libraries (Found in lib/):
    • vlcj-4.7.1.jar
    • vlcj-natives-4.1.0.jar
    • jna-5.8.0.jar
    • jna-platform-5.8.0.jar

Note: These libraries are essential for the application to interface with the VLC media player installed inside the Docker container.

3. Build the JAR (If not present)

If P2PVideoApp.jar is not in the root directory:

  1. Export the project as a Runnable JAR from Eclipse or IntelliJ.
  2. Name it P2PVideoApp.jar.
  3. Place it in the root folder (next to Dockerfile).

X Server Configuration (Required for Windows)

Since the app has a GUI running inside Docker, you need an X Server to see it.

  1. Install VcXsrv.
  2. Run XLaunch with these settings:
    • Display number: 0
    • Extra settings: Check "Disable access control" (Crucial step!).
  3. The docker-compose.yml is already configured to use DISPLAY=host.docker.internal:0.0.

How to Run

Open a terminal in the project folder and run:

docker-compose up --build