easy-p2p

Port-forwarding P2P demo with invite code, console log, sidebar game selection, and board canvas (Gomoku-style). No STUN/TURN/ZeroTier required. Use manual port forwarding or IPv6.

Build

mvn -v          # ensure Maven is installed
mvn clean package

This produces a fat JAR:

target/easy-p2p-1.0.0-shaded.jar

Run

Server (generate invite)

java -jar target/easy-p2p-1.0.0-shaded.jar

Click “我是服务器(生成邀请码)” → copy the invite code and send to your peer. Make sure your router forwards the selected TCP port (default 2266) to your host.

Client (paste invite)

java -jar target/easy-p2p-1.0.0-shaded.jar

Paste the invite code and click connect.

Notes

• The app fetches your public IPv4 via checkip.amazonaws.com for invite code.
• Use manual port forwarding (IPv4) or allow inbound (IPv6) in your router/firewall.
• Invite is AES-256-CBC (+ Base64). You can rotate the key in InviteCodec.