CN Chat Server (C++)

A multi-client encrypted chat server built using C++ raw sockets (WinAPI) for Windows. This project supports multiple groups (domains), private messaging, full admin control, and persistent logging.

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🚀 Features

• Group-based chat (domains)
• XOR-based message encryption
• Private messaging (/whisper)
• Admin system:
  • /promote and /demote
  • /ban, /mute, /kick
  • /deletegroup and /kickgroup
• Global broadcasts (/broadcast)
• MOTD system (/setmotd and /motd)
• Chat archiving (/archive)
• Server statistics (/stats)
• Persistent logs (chatlog.txt, user_activity.log)

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🛠️ Commands Overview

Command	Description
/list	Show online users
/listgroups	Show all active groups
/whisper <user> <msg>	Private message
/rename <newname>	Change username
/changegroup <group>	Switch group/domain
/broadcast <msg>	[admin] Global broadcast
/ban <user>	[admin] Ban user
/mute <user>	[admin] Mute user
/unmute <user>	[admin] Unmute user
/kick <user>	[admin] Kick user
/kickgroup <group>	[admin] Kick all users in a group
/deletegroup <group>	[admin] Kick and delete group
/lockgroup <group>	[admin] Lock group (block join)
/unlockgroup <group>	[admin] Unlock group
/setmotd <text>	[admin] Set Message of the Day
/motd	Show current MOTD
/archive	Archive current chat log
/stats	Show server statistics
/showlog	View chat log
/savegroups	Save active groups
/whois <user>	[admin] User status
/promote <user>	[admin] Promote user to admin
/demote <user>	[admin] Demote user
/help	Show all commands
/exit	Disconnect

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🛠️ Setup & Build Instructions

💻 Requirements:

• Windows (Tested on Windows 10/11)
• MinGW or Visual Studio for compilation

🏗️ Compilation:

# Compile Server
g++ server.cpp -o server.exe -lws2_32

# Compile Client
g++ client.cpp -o client.exe -lws2_32