Dotachi - LAN Gaming Network Platform

A self-hosted platform that lets players create and join virtual LAN rooms for multiplayer gaming. Built for regions with restrictive or unstable networks, Dotachi uses SoftEther VPN to create rock-solid L2 bridges that make LAN games work seamlessly over the internet.

Architecture

                    +------------------+
                    |   Control Plane  |
                    |   (REST API)     |
                    +--------+---------+
                             |
              +--------------+--------------+
              |              |              |
        +-----+-----+  +----+----+   +-----+-----+
        | Node Agent |  |  Node   |   |   Node    |
        | (VPS #1)   |  | (VPS #2)|   |  (VPS #3) |
        | SoftEther  |  | SoftEther|   | SoftEther |
        +-----+------+  +----+----+   +-----+-----+
              |              |              |
         Players         Players        Players
         connect         connect        connect

Components

Component	Description	Tech
Control Plane	Central API server - manages users, rooms, nodes, billing	Go + PostgreSQL + Chi
Node Agent	Runs on each VPN server alongside SoftEther	Go (single binary, ~9 MB)
Client	Windows desktop app for players	Go (Wails) + React
Admin Panel	Web dashboard for platform operators	Vanilla HTML/CSS/JS
CLI	Command-line admin tool	Go + Cobra
Deploy	One-command node setup script	Bash + systemd

Key Features

• Virtual LAN rooms with isolated L2 networks per room
• Multi-TCP VPN tunneling (8 simultaneous TCP streams on port 443) for connection resilience
• Auto-reconnect with exponential backoff - players never notice brief network hiccups
• Shard-based billing - users purchase shards to buy private rooms or join shared LAN
• Room management - owners can kick, ban, set admins, transfer ownership
• Node heartbeat - control plane monitors all VPN nodes, auto-recovers after reboots
• Split tunneling - only game traffic routes through VPN, internet stays on normal connection
• Device fingerprinting - one account per device enforcement

Quick Start

Development (Docker)

docker compose up -d

This starts PostgreSQL + Control Plane + Node Agent + Admin Panel.

• Control Plane API: http://localhost:8080
• Admin Panel: http://localhost:8081
• Default admin: phone 09000000000, password admin123

Production Node Deployment

# On a fresh Ubuntu VPS:
export API_SECRET="your-secret-here"
export CONTROL_PLANE_URL="http://your-control-plane:8080"
bash deploy/setup-node.sh

Business Model

• Private Rooms: Users purchase rooms with shards (virtual currency). Price = slots x 1,000 shards/day. Discounts for longer durations.
• Shared LAN: Public rooms charged at 2,000 shards/hour while connected.
• Shard Purchase: Admin manages shard balances via API or admin panel.

Duration	Discount
7 days (minimum)	No discount
1 month	10% off
3 months	25% off
1 year	40% off

Supported Games

Dotachi works with any game that supports LAN multiplayer:

• Dota 2
• Counter-Strike 2
• Warcraft III
• Age of Empires II
• Minecraft
• Valorant (Custom Games)
• Any game with LAN/local network support

Tech Stack

• Language: Go (all backend + client backend)
• Frontend: React (client UI), Vanilla JS (admin panel)
• Database: PostgreSQL
• VPN: SoftEther VPN Server
• Desktop: Wails v2 (Go + Web frontend)
• Deployment: Docker, systemd

License

MIT