This is a proof-of-concept event-driven chat server implemented using
kqueue under FreeBSD. In the description of the protocol used, <CRLF>
represents a carriage return followed by a new line. And the defined
commands (the trailing <CRLF> included) are limited to 1024 bytes.
The client should login first upon connecting to the server with the
following command:
LOGIN <username><CRLF>
The other commands at the disposal of the clients are:
JOIN <#chatroom><CRLF>
Create a new chatroom or join an existing one.
PART <#chatroom><CRLF>
Leave the chatroom.
MSG <#chatroom><message-text><CRLF>
Send a message to a chatroom. All the users in the chatroom receive
the message.
MSG <username><message-text><CRLF>
Send a message to the given user.
LOGOUT<CRLF>
Logout of the chat server.
The server answers to a client's command with either "OK<CRLF>" if the
command is successful or "ERROR <reason><CRLF>" otherwise. When a
message is sent to a chatroom a client is in, he receives the
following message from the server:
GOTROOMMSG <sender> #<chatroom> <message-text><CRLF>
In the case where another user sent a message directly to the client,
the server sends:
GOTUSERMSG <sender> <message-text><CRLF>