ServerController

A lightweight remote Minecraft server controller backend written in C.

This project acts as a relay/controller server that allows authenticated clients to:

• Wake a remote Minecraft host PC using Wake-on-LAN
• Start and stop the Minecraft server remotely
• Authenticate securely using SHA-256 challenge-response
• Maintain persistent client sessions
• Log and monitor connections

Designed to run efficiently on low-power hardware such as Raspberry Pi systems or lightweight Linux servers.

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Features

• TCP server backend
• SHA-256 challenge-response authentication
• Wake-on-LAN support
• Persistent authenticated sessions
• Command handling system
• Lightweight C implementation
• Logging system
• Linux/Raspberry Pi friendly

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Authentication Flow

The server uses a challenge-response authentication model.

Process

1. Client connects
2. Server generates random challenge
3. Client computes:
4. Client sends computed hash
5. Server validates hash
6. Client becomes authenticated

The password itself is never transmitted across the network.

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Server Commands

Command	Description
WOL	Sends Wake-on-LAN packet
START	Starts Minecraft server
STOP	Stops Minecraft server
PING	Status check

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