MRC

Multi Relay Chat is a chat network of BBSes: Mystic, Synchronet, ENiGMA½ and others share its rooms. The BBS joins it as its own MRC connector, with one connection to the MRC server carrying all its users. No connector program is needed.

MRC's rooms are the BBS's chat rooms that begin with the prefix (mrc-): mrc-lobby is MRC's lobby. Whoever is in that room on the BBS, from a terminal, a 3270, the web or IRC (#mrc-lobby), is in MRC's lobby, under their name.

[mrc]
address = mrc.bottomlessabyss.net:5001
tls = yes
web = https://bbs.example.org/
telnet = bbs.example.org:23

Setting	Default	What it sets
address	mrc.bottomlessabyss.net:5000	the MRC server (5001 with TLS)
tls	no	TLS to it
prefix	mrc-	what begins MRC's rooms here
system_name	the BBS's name	the BBS as MRC shows it (Mystic's |NN colour codes allowed)
web, telnet, ssh, sysop, description	(the sysop's name, the BBS's)	what MRC's INFO tells of the BBS
require	(anyone who may chat)	who may go into MRC's rooms (access levels)

Chatting

• /join mrc-lobby in the BBS's chat (JOIN #mrc-lobby on IRC) goes into MRC's lobby. Others on the network see the user arrive, and see them leave when they go.
• Lines said there go to MRC as <name> text, and /me as an action. Lines from other systems show as carol@Far_BBS: text (on IRC, from carol_Far_BBS!mrc@far_bbs). MRC's colour codes are removed.
• !COMMAND is a command for the MRC server, not a line for the room: !motd, !list (its rooms), !chatters, !bbses, !info N and the rest (the server says which it does not know). Its answers come to whoever asked. !!text says a line that begins with !.
• Private messages to a user here come to them alone.

A user in two of MRC's rooms here (an IRC client in two channels) is in one on MRC, the last they spoke in. MRC has a user in one room at a time.

Each user is kept present (IAMHERE) every minute. If the connection drops, the BBS connects again after 30 seconds and puts back everyone who was there.

A sysop can make mrc-lobby a permanent room, so that it is listed even when no one here is in it.

The protocol

The BBS speaks MRC's protocol as Synchronet's mrc-connector.js and mrc-session.js do:

• the handshake SYSTEM~BBSSEC/os_arch/1.3.5, then the server's hello;
• lines of FromUser~FromSite~FromRoom~ToUser~MsgExt~ToRoom~Body~;
• INFO*, IMALIVE and CAPABILITIES for the BBS;
• IMALIVE in answer to the server's PING;
• IAMHERE for each user, NEWROOM:old:new to move, LOGOFF to go;
• names without spaces (underscores), at most 30 characters.

See also: Chat and paging, IRC