A small Internet Relay Chat (IRC) server made in C++.

Clone this repository and cd into it. To build, use make.

To launch the server:

./ircserv <port> <password>

This project was developed for the IRSSI client. After launching irssi, run the following command:

/connect localhost <server_port> <server_password>

Alternatively, connect to the server using nc, netcat or ncat, whichever one has the -C or --crlf options to enable CRLF for EOL sequence: the IRC protocol specifies that messages are only valid if they end with \r\n.

nc -C localhost <server_port>

Then, you can input your IRC commands. To properly register on the server, use the following commands:

PASS <server_password>
USER <user> <mode(unused)> <host(unused)> <realname>
NICK <nickname>

• ADMIN: Displays information about the administrator of the server.
• INFO: Displays information about the server.
• INVITE <nickname> <channel_name>: Invites a user to a channel.
• JOIN <channel_name>: Joins an existing channel or creates one. If 0 is specified as the channel name, removes the user from all channels.
• KICK <nickname> <channel_name>: Kicks a user from a channel (this is a channel operator command)
• LIST: Lists all channels on the server.
• MODE <channel_name> <mode(s)>: Sets/removes channel modes. Implemented channel modes:
  • i: set/remove invite-only mode.
  • k: set/remove the channel key (password)
  • l: set/remove a channel's user limit
  • o: give/take channel operator privileges
  • t: set/remove the restrictions of the TOPIC command to channel operators
• NAMES: lists all of the nicknames on the server.
• NICK <nickname>: sets the user's nickname.
• PART <channel_name> <message>: removes user from channel(s) and notifies the other users in the channel.
• PASS <password>: Used for registration to the server. The client must supply the server password as part of the registration process.
• PING: Used to test the presence of an active client.
• PONG: Used to reply to a PING message.
• PRIVMSG <nickname_or_channel_name> <message>: sends a message to the specified user or channel.
• QUIT <message>: Removes the user from the server and notifies other users in the channels the quitting user was in.
• SUMMON: Not implemented.
• TOPIC <channel_name> <message>: sets message as the channel topic.
• USER <user> <mode(unused)> <host(unused)> <realname>: sets a new user's information during registration.
• USERS: Not implemented.
• VERSION: Displays the server version.