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-- README
-- Squish verse into this dir, then squish them into one, which you move
-- and rename to mod_ircd.lua in your prosody modules/plugins dir.
--
-- IRC spec:
-- http://tools.ietf.org/html/rfc2812
local client_xmlns = "jabber:client"
--module:set_global();
local server = require "net.server";
local portmanager = require "core.portmanager";
local component_jid, component_secret, muc_server, port_number =
module.host, nil, module:get_option_string("conference_server"), module:get_option_number("listener_port", 7000);
if not muc_server then
module:log ("error", "You need to set the MUC server in the configuration (conference_server)!")
module:log ("error", "Be a good boy or girl and go read the wiki at: http://code.google.com/p/prosody-modules/wiki/mod_ircd")
return false;
end
package.loaded["util.sha1"] = require "util.encodings";
--local verse = require "verse"
--require "verse.component"
--require "socket"
require "verse".init("component");
c = verse.new(); -- something interferes with prosody's console logging
c:add_plugin("groupchat");
local function verse2prosody(e)
return c:event("stanza", e.stanza) or true;
end
module:hook("message/bare", verse2prosody);
module:hook("message/full", verse2prosody);
module:hook("presence/bare", verse2prosody);
module:hook("presence/full", verse2prosody);
c.type = "component";
c.send = core_post_stanza;
local jid = require "util.jid";
local nodeprep = require "util.encodings".stringprep.nodeprep;
local function utf8_clean (s)
local push, join = table.insert, table.concat;
local r, i = {}, 1;
if not(s and #s > 0) then
return ""
end
while true do
local c = s:sub(i,i)
local b = c:byte();
local w = (
(b >= 9 and b <= 10 and 0) or
(b >= 32 and b <= 126 and 0) or
(b >= 192 and b <= 223 and 1) or
(b >= 224 and b <= 239 and 2) or
(b >= 240 and b <= 247 and 3) or
(b >= 248 and b <= 251 and 4) or
(b >= 251 and b <= 252 and 5) or nil
)
if not w then
push(r, "?")
else
local n = i + w;
if w == 0 then
push(r, c);
elseif n > #s then
push(r, ("?"):format(b));
else
local e = s:sub(i+1,n);
if e:match('^[\128-\191]*$') then
push(r, c);
push(r, e);
i = n;
else
push(r, ("?"):format(b));
end
end
end
i = i + 1;
if i > #s then
break
end
end
return join(r);
end
local function parse_line(line)
local ret = {};
if line:sub(1,1) == ":" then
ret.from, line = line:match("^:(%w+)%s+(.*)$");
end
for part in line:gmatch("%S+") do
if part:sub(1,1) == ":" then
ret[#ret+1] = line:match(":(.*)$");
break
end
ret[#ret+1]=part;
end
return ret;
end
local function build_line(parts)
if #parts > 1 then
parts[#parts] = ":" .. parts[#parts];
end
return (parts.from and ":"..parts.from.." " or "")..table.concat(parts, " ");
end
local function irc2muc(channel, nick)
local room = channel and nodeprep(channel:match("^#(%w+)")) or nil;
if not nick then
return jid.join(room, muc_server);
else
return jid.join(room, muc_server, nick);
end
end
local function muc2irc(room)
local channel, _, nick = jid.split(room);
return "#"..channel, nick;
end
local role_map = {
moderator = "@",
participant = "",
visitor = "",
none = ""
}
local aff_map = {
owner = "~",
administrator = "&",
member = "+",
none = ""
}
local role_modemap = {
moderator = "o",
participant = "",
visitor = "",
none = ""
}
local aff_modemap = {
owner = "q",
administrator = "a",
member = "v",
none = ""
}
local irc_listener = { default_port = port_number, default_mode = "*l"; interface = "192.168.1.3" };
local sessions = module:shared("sessions");
local jids = {};
local commands = {};
local nicks = {};
local usernames = {};
local st = require "util.stanza";
local conference_server = muc_server;
local function irc_close_session(session)
session.conn:close();
end
function irc_listener.onincoming(conn, data)
local session = sessions[conn];
if not session then
session = { conn = conn, host = component_jid, reset_stream = function () end,
close = irc_close_session, log = logger.init("irc"..(conn.id or "1")),
rooms = {}, roster = {}, has_un = false };
sessions[conn] = session;
function session.data(data)
local parts = parse_line(data);
module:log("debug", require"util.serialization".serialize(parts));
local command = table.remove(parts, 1);
if not command then
return;
end
command = command:upper();
if not session.username and not session.nick then
if not (command == "USER" or command == "NICK") then
module:log("debug", "Client tried to send command %s before registering", command);
return session.send{from=muc_server, "451", command, "You have not completed the registration."}
end
end
if commands[command] then
local ret = commands[command](session, parts);
if ret then
return session.send(ret);
end
else
session.send{from=muc_server, "421", session.nick, command, "Unknown command"};
return module:log("debug", "Unknown command: %s", command);
end
end
function session.send(data)
if type(data) == "string" then
return conn:write(data.."\r\n");
elseif type(data) == "table" then
local line = build_line(data);
module:log("debug", line);
conn:write(line.."\r\n");
end
end
end
if data then
session.data(data);
end
end
function irc_listener.ondisconnect(conn, error)
local session = sessions[conn];
if session then
for _, room in pairs(session.rooms) do
room:leave("Disconnected");
end
if session.nick then
nicks[session.nick] = nil;
end
if session.full_jid then
jids[session.full_jid] = nil;
end
if session.username then
usernames[session.username] = nil;
end
end
sessions[conn] = nil;
end
local function nick_inuse(nick)
if nicks[nick] then return true else return false end
end
local function check_username(un)
local count = 0;
local result;
for name, given in pairs(usernames) do
if un == given then count = count + 1; end
end
result = count + 1;
if count > 0 then return tostring(un)..tostring(result); else return tostring(un); end
end
local function set_t_data(session, full_jid)
session.full_jid = full_jid;
jids[full_jid] = session;
jids[full_jid]["ar_last"] = {};
jids[full_jid]["nicks_changing"] = {};
if session.nick then nicks[session.nick] = session; end
end
local function send_motd(session)
local nick = session.nick;
if session.username and session.nick then -- send MOTD only if username and nick are set
session.send{from = muc_server, "001", nick, "Welcome in the IRC to MUC XMPP Gateway, "..nick};
session.send{from = muc_server, "002", nick, "Your host is "..muc_server.." running Prosody "..prosody.version};
session.send{from = muc_server, "003", nick, "This server was created the "..os.date(nil, prosody.start_time)}
session.send{from = muc_server, "004", nick, table.concat({muc_server, "mod_ircd(alpha-0.8)", "i", "aoqv"}, " ")};
session.send((":%s %s %s %s :%s"):format(muc_server, "005", nick, "CHANTYPES=# PREFIX=(qaov)~&@+", "are supported by this server"));
session.send((":%s %s %s %s :%s"):format(muc_server, "005", nick, "STATUSMSG=~&@+", "are supported by this server"));
session.send{from = muc_server, "375", nick, "- "..muc_server.." Message of the day -"};
session.send{from = muc_server, "372", nick, "-"};
session.send{from = muc_server, "372", nick, "- Please be warned that this is only a partial irc implementation,"};
session.send{from = muc_server, "372", nick, "- it's made to facilitate users transiting away from irc to XMPP."};
session.send{from = muc_server, "372", nick, "-"};
session.send{from = muc_server, "372", nick, "- Prosody is _NOT_ an IRC Server and it never will."};
session.send{from = muc_server, "372", nick, "- We also would like to remind you that this plugin is provided as is,"};
session.send{from = muc_server, "372", nick, "- it's still an Alpha and it's still a work in progress, use it at your sole"};
session.send{from = muc_server, "372", nick, "- risk as there's a not so little chance something will break."};
session.send{from = nick, "MODE", nick, "+i"}; -- why -> Invisible mode setting,
end -- enforce by default on most servers (since the source host doesn't show it's sensible to have it "set")
end
function commands.NICK(session, args)
local nick = args[1];
nick = nick:gsub("[^%w_]","");
if session.nick and not nick_inuse(nick) then -- changing nick
local oldnick = session.nick;
-- update and replace session data
session.nick = nick;
nicks[oldnick] = nil;
nicks[nick] = session;
session.send{from=oldnick.."!"..nicks[nick].username, "NICK", nick};
-- broadcast changes if required
if session.rooms then
session.nicks_changing[nick] = { oldnick, session.username };
for id, room in pairs(session.rooms) do room:change_nick(nick); end
session.nicks_changing[nick] = nil;
end
return;
elseif nick_inuse(nick) then
session.send{from=muc_server, "433", nick, "The nickname "..nick.." is already in use"}; return;
end
session.nick = nick;
session.type = "c2s";
nicks[nick] = session;
-- Some choppy clients send in NICK before USER, that needs to be handled
if session.username then
set_t_data(session, jid.join(session.username, component_jid, "ircd"));
end
send_motd(session);
end
function commands.USER(session, params)
local username = params[1];
if not session.has_un then
local un_checked = check_username(username);
usernames[un_checked] = username;
session.username = un_checked;
session.has_un = true;
if not session.full_jid then
set_t_data(session, jid.join(session.username, component_jid, "ircd"));
end
else
return session.send{from=muc_server, "462", "USER", "You may not re-register."}
end
send_motd(session);
end
function commands.USERHOST(session, params) -- can show only users on the gateway. Needed for some clients to determinate self hostmask.
local nick = params[1];
if not nick then session.send{from=muc_server, "461", "USERHOST", "Not enough parameters"}; return; end
if nicks[nick] and nicks[nick].nick and nicks[nick].username then
session.send{from=muc_server, "302", session.nick, nick.."=+"..nicks[nick].username}; return;
else
return;
end
end
local function mode_map(am, rm, nicks)
local rnick;
local c_modes;
c_modes = aff_modemap[am]..role_modemap[rm]
rnick = string.rep(nicks.." ", c_modes:len())
if c_modes == "" then return nil, nil end
return c_modes, rnick
end
function commands.JOIN(session, args)
local channel = args[1];
if not channel then return end
local room_jid = irc2muc(channel);
if not jids[session.full_jid].ar_last[room_jid] then jids[session.full_jid].ar_last[room_jid] = {}; end
local room, err = c:join_room(room_jid, session.nick, { source = session.full_jid } );
if not room then
return ":"..muc_server.." ERR :Could not join room: "..err
end
session.rooms[channel] = room;
room.session = session;
if session.nicks_changing[session.nick] then -- my own nick is changing
commands.NAMES(session, channel);
else
session.send{from=session.nick.."!"..session.username, "JOIN", channel};
if room.subject then
session.send{from=muc_server, 332, session.nick, channel, room.subject};
end
commands.NAMES(session, channel);
end
room:hook("subject-changed", function(changed)
session.send{from=changed.by.nick, "TOPIC", channel, changed.to or ""}
end);
room:hook("message", function(event)
if not event.body then return end
local nick, body = event.nick, event.body;
if nick ~= session.nick then
if body:sub(1,4) == "/me " then
body = "\1ACTION ".. body:sub(5) .. "\1"
end
local type = event.stanza.attr.type;
session.send{from=nick, "PRIVMSG", type == "groupchat" and channel or nick, body};
--FIXME PM's probably won't work
end
end);
room:hook("presence", function(ar)
local c_modes;
local rnick;
if ar.nick and not jids[session.full_jid].ar_last[ar.room_jid][ar.nick] then jids[session.full_jid].ar_last[ar.room_jid][ar.nick] = {} end
local x_ar = ar.stanza:get_child("x", "http://jabber.org/protocol/muc#user")
if x_ar then
local xar_item = x_ar:get_child("item")
if xar_item and xar_item.attr and ar.stanza.attr.type ~= "unavailable" then
if xar_item.attr.affiliation and xar_item.attr.role then
if not jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"] and
not jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"] then
jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"] = xar_item.attr.affiliation
jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"] = xar_item.attr.role
n_self_changing = nicks[ar.nick] and nicks[ar.nick].nicks_changing and nicks[ar.nick].nicks_changing[ar.nick]
if n_self_changing then return; end
c_modes, rnick = mode_map(xar_item.attr.affiliation, xar_item.attr.role, ar.nick);
if c_modes and rnick then session.send((":%s MODE %s +%s"):format(muc_server, channel, c_modes.." "..rnick)); end
else
c_modes, rnick = mode_map(jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"], jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"], ar.nick);
if c_modes and rnick then session.send((":%s MODE %s -%s"):format(muc_server, channel, c_modes.." "..rnick)); end
jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"] = xar_item.attr.affiliation
jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"] = xar_item.attr.role
n_self_changing = nicks[ar.nick] and nicks[ar.nick].nicks_changing and nicks[ar.nick].nicks_changing[ar.nick]
if n_self_changing then return; end
c_modes, rnick = mode_map(xar_item.attr.affiliation, xar_item.attr.role, ar.nick);
if c_modes and rnick then session.send((":%s MODE %s +%s"):format(muc_server, channel, c_modes.." "..rnick)); end
end
end
end
end
end, -1);
end
c:hook("groupchat/joined", function(room)
local session = room.session or jids[room.opts.source];
local channel = "#"..room.jid:match("^(.*)@");
room:hook("occupant-joined", function(nick)
if session.nicks_changing[nick.nick] then
session.send{from=session.nicks_changing[nick.nick][1].."!"..(session.nicks_changing[nick.nick][2] or "xmpp"), "NICK", nick.nick};
session.nicks_changing[nick.nick] = nil;
else
session.send{from=nick.nick.."!"..(nicks[nick.nick] and nicks[nick.nick].username or "xmpp"), "JOIN", channel};
end
end);
room:hook("occupant-left", function(nick)
if jids[session.full_jid] then jids[session.full_jid].ar_last[nick.jid:match("^(.*)/")][nick.nick] = nil; end
local status_code =
nick.presence:get_child("x","http://jabber.org/protocol/muc#user") and
nick.presence:get_child("x","http://jabber.org/protocol/muc#user"):get_child("status") and
nick.presence:get_child("x","http://jabber.org/protocol/muc#user"):get_child("status").attr.code;
if status_code == "303" then
local newnick =
nick.presence:get_child("x","http://jabber.org/protocol/muc#user") and
nick.presence:get_child("x","http://jabber.org/protocol/muc#user"):get_child("item") and
nick.presence:get_child("x","http://jabber.org/protocol/muc#user"):get_child("item").attr.nick;
session.nicks_changing[newnick] = { nick.nick, (nicks[nick.nick] and nicks[nick.nick].username or "xmpp") }; return;
end
for id, data in pairs(session.nicks_changing) do
if data[1] == nick.nick then return; end
end
session.send{from=nick.nick.."!"..(nicks[nick.nick] and nicks[nick.nick].username or "xmpp"), "PART", channel};
end);
end);
function commands.NAMES(session, channel)
local nicks = { };
if type(channel) == "table" then channel = channel[1] end
local room = session.rooms[channel];
local symbols_map = {
owner = "~",
administrator = "&",
moderator = "@",
member = "+"
}
if not room then return end
-- TODO Break this out into commands.NAMES
for nick, n in pairs(room.occupants) do
if n.affiliation == "owner" and n.role == "moderator" then
nick = symbols_map[n.affiliation]..nick;
elseif n.affiliation == "administrator" and n.role == "moderator" then
nick = symbols_map[n.affiliation]..nick;
elseif n.affiliation == "member" and n.role == "moderator" then
nick = symbols_map[n.role]..nick;
elseif n.affiliation == "member" and n.role == "partecipant" then
nick = symbols_map[n.affiliation]..nick;
elseif n.affiliation == "none" and n.role == "moderator" then
nick = symbols_map[n.role]..nick;
end
table.insert(nicks, nick);
end
nicks = table.concat(nicks, " ");
session.send((":%s 353 %s = %s :%s"):format(muc_server, session.nick, channel, nicks));
session.send((":%s 366 %s %s :End of /NAMES list."):format(muc_server, session.nick, channel));
session.send(":"..muc_server.." 353 "..session.nick.." = "..channel.." :"..nicks);
end
function commands.PART(session, args)
local channel, part_message = unpack(args);
local room = channel and nodeprep(channel:match("^#(%w+)")) or nil;
if not room then return end
channel = channel:match("^([%S]*)");
session.rooms[channel]:leave(part_message);
jids[session.full_jid].ar_last[room.."@"..muc_server] = nil;
session.send{from=session.nick.."!"..session.username, "PART", channel};
end
function commands.PRIVMSG(session, args)
local channel, message = unpack(args);
if message and #message > 0 then
if message:sub(1,8) == "\1ACTION " then
message = "/me ".. message:sub(9,-2)
end
message = utf8_clean(message);
if channel:sub(1,1) == "#" then
if session.rooms[channel] then
module:log("debug", "%s sending PRIVMSG \"%s\" to %s", session.nick, message, channel);
session.rooms[channel]:send_message(message);
end
else -- private message
local nick = channel;
module:log("debug", "PM to %s", nick);
for channel, room in pairs(session.rooms) do
module:log("debug", "looking for %s in %s", nick, channel);
if room.occupants[nick] then
module:log("debug", "found %s in %s", nick, channel);
local who = room.occupants[nick];
-- FIXME PMs in verse
--room:send_private_message(nick, message);
local pm = st.message({type="chat",to=who.jid}, message);
module:log("debug", "sending PM to %s: %s", nick, tostring(pm));
room:send(pm)
break
end
end
end
end
end
function commands.PING(session, args)
session.send{from=muc_server, "PONG", args[1]};
end
function commands.TOPIC(session, message)
if not message then return end
local channel, topic = message[1], message[2];
channel = utf8_clean(channel);
topic = utf8_clean(topic);
if not channel then return end
local room = session.rooms[channel];
if topic then room:set_subject(topic); end
end
function commands.WHO(session, args)
local channel = args[1];
if session.rooms[channel] then
local room = session.rooms[channel]
for nick in pairs(room.occupants) do
session.send{from=muc_server, 352, session.nick, channel, nick, nick, muc_server, nick, "H", "0 "..nick}
end
session.send{from=muc_server, 315, session.nick, channel, "End of /WHO list"};
end
end
function commands.MODE(session, args) -- Empty command
end
function commands.QUIT(session, args)
session.send{"ERROR", "Closing Link: "..session.nick};
for _, room in pairs(session.rooms) do
room:leave(args[1]);
end
jids[session.full_jid] = nil;
nicks[session.nick] = nil;
usernames[session.username] = nil;
sessions[session.conn] = nil;
session:close();
end
function commands.RAW(session, data) -- Empty command
end
module:provides("net", {
name = "ircd";
listener = irc_listener;
default_port = 7000;
});