aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/muc/mod_muc.lua
blob: 9481c977e434c299f0aaa16878ec8fa09a09ce2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

-- Exposed functions:
--
-- create_room(jid) -> room
-- track_room(room)
-- delete_room(room)
-- forget_room(room)
-- get_room_from_jid(jid) -> room
-- each_room(live_only) -> () -> room [DEPRECATED]
-- all_rooms() -> room
-- live_rooms() -> room
-- shutdown_component()

if module:get_host_type() ~= "component" then
	error("MUC should be loaded as a component, please see https://prosody.im/doc/components", 0);
end

local muclib = module:require "muc";
room_mt = muclib.room_mt; -- Yes, global.
new_room = muclib.new_room;

local name = module:require "muc/name";
room_mt.get_name = name.get;
room_mt.set_name = name.set;

local description = module:require "muc/description";
room_mt.get_description = description.get;
room_mt.set_description = description.set;

local language = module:require "muc/language";
room_mt.get_language = language.get;
room_mt.set_language = language.set;

local hidden = module:require "muc/hidden";
room_mt.get_hidden = hidden.get;
room_mt.set_hidden = hidden.set;
function room_mt:get_public()
	return not self:get_hidden();
end
function room_mt:set_public(public)
	return self:set_hidden(not public);
end

local password = module:require "muc/password";
room_mt.get_password = password.get;
room_mt.set_password = password.set;

local members_only = module:require "muc/members_only";
room_mt.get_members_only = members_only.get;
room_mt.set_members_only = members_only.set;
room_mt.get_allow_member_invites = members_only.get_allow_member_invites;
room_mt.set_allow_member_invites = members_only.set_allow_member_invites;

local moderated = module:require "muc/moderated";
room_mt.get_moderated = moderated.get;
room_mt.set_moderated = moderated.set;

local request = module:require "muc/request";
room_mt.handle_role_request = request.handle_request;

local persistent = module:require "muc/persistent";
room_mt.get_persistent = persistent.get;
room_mt.set_persistent = persistent.set;

local subject = module:require "muc/subject";
room_mt.get_changesubject = subject.get_changesubject;
room_mt.set_changesubject = subject.set_changesubject;
room_mt.get_subject = subject.get;
room_mt.set_subject = subject.set;
room_mt.send_subject = subject.send;

local history = module:require "muc/history";
room_mt.send_history = history.send;
room_mt.get_historylength = history.get_length;
room_mt.set_historylength = history.set_length;

local register = module:require "muc/register";
room_mt.get_registered_nick = register.get_registered_nick;
room_mt.get_registered_jid = register.get_registered_jid;
room_mt.handle_register_iq = register.handle_register_iq;

local presence_broadcast = module:require "muc/presence_broadcast";
room_mt.get_presence_broadcast = presence_broadcast.get;
room_mt.set_presence_broadcast = presence_broadcast.set;
room_mt.get_valid_broadcast_roles = presence_broadcast.get_valid_broadcast_roles;


local jid_split = require "util.jid".split;
local jid_prep = require "util.jid".prep;
local jid_bare = require "util.jid".bare;
local st = require "util.stanza";
local cache = require "util.cache";
local um_is_admin = require "core.usermanager".is_admin;

module:require "muc/config_form_sections";

module:depends("disco");
module:add_identity("conference", "text", module:get_option_string("name", "Prosody Chatrooms"));
module:add_feature("http://jabber.org/protocol/muc");
module:depends "muc_unique"
module:require "muc/lock";

local function is_admin(jid)
	return um_is_admin(jid, module.host);
end

do -- Monkey patch to make server admins room owners
	local _get_affiliation = room_mt.get_affiliation;
	function room_mt:get_affiliation(jid)
		if is_admin(jid) then return "owner"; end
		return _get_affiliation(self, jid);
	end

	local _set_affiliation = room_mt.set_affiliation;
	function room_mt:set_affiliation(actor, jid, affiliation, reason, data)
		if affiliation ~= "owner" and is_admin(jid) then return nil, "modify", "not-acceptable"; end
		return _set_affiliation(self, actor, jid, affiliation, reason, data);
	end
end

local persistent_rooms_storage = module:open_store("persistent");
local persistent_rooms = module:open_store("persistent", "map");
local room_configs = module:open_store("config");
local room_state = module:open_store("state");

local room_items_cache = {};

local function room_save(room, forced, savestate)
	local node = jid_split(room.jid);
	local is_persistent = persistent.get(room);
	room_items_cache[room.jid] = room:get_public() and room:get_name() or nil;
	if is_persistent or savestate then
		persistent_rooms:set(nil, room.jid, true);
		local data, state = room:freeze(savestate);
		room_state:set(node, state);
		return room_configs:set(node, data);
	elseif forced then
		persistent_rooms:set(nil, room.jid, nil);
		room_state:set(node, nil);
		return room_configs:set(node, nil);
	end
end

local max_rooms = module:get_option_number("muc_max_rooms");
local max_live_rooms = module:get_option_number("muc_room_cache_size", 100);

local room_hit = module:measure("room_hit", "rate");
local room_miss = module:measure("room_miss", "rate")
local room_eviction = module:measure("room_eviction", "rate");
local rooms = cache.new(max_rooms or max_live_rooms, function (jid, room)
	if max_rooms then
		module:log("info", "Room limit of %d reached, no new rooms allowed", max_rooms);
		return false;
	end
	module:log("debug", "Evicting room %s", jid);
	room_eviction();
	room_items_cache[room.jid] = room:get_public() and room:get_name() or nil;
	local ok, err = room_save(room, nil, true); -- Force to disk
	if not ok then
		module:log("error", "Failed to swap inactive room %s to disk: %s", jid, err);
		return false;
	end
end);

-- Automatically destroy empty non-persistent rooms
module:hook("muc-occupant-left",function(event)
	local room = event.room
	if room.destroying then return end
	if not room:has_occupant() and not persistent.get(room) then -- empty, non-persistent room
		module:log("debug", "%q empty, destroying", room.jid);
		module:fire_event("muc-room-destroyed", { room = room });
	end
end, -1);

function track_room(room)
	if rooms:set(room.jid, room) then
		-- When room is created, over-ride 'save' method
		room.save = room_save;
		return room;
	end
	-- Resource limit reached
	return false;
end

local function handle_broken_room(room, origin, stanza)
	module:log("debug", "Returning error from broken room %s", room.jid);
	origin.send(st.error_reply(stanza, "wait", "internal-server-error", nil, room.jid));
	return true;
end

local function restore_room(jid)
	local node = jid_split(jid);
	local data, err = room_configs:get(node);
	if data then
		module:log("debug", "Restoring room %s from storage", jid);
		if module:fire_event("muc-room-pre-restore", { jid = jid, data = data }) == false then
			return false;
		end
		local state, s_err = room_state:get(node);
		if not state and s_err then
			module:log("debug", "Could not restore state of room %s: %s", jid, s_err);
		end
		local room = muclib.restore_room(data, state);
		if track_room(room) then
			room_state:set(node, nil);
			module:fire_event("muc-room-restored", { jid = jid, room = room });
			return room;
		else
			return false;
		end
	elseif err then
		module:log("error", "Error restoring room %s from storage: %s", jid, err);
		local room = muclib.new_room(jid, { locked = math.huge });
		room.handle_normal_presence = handle_broken_room;
		room.handle_first_presence = handle_broken_room;
		return room;
	end
end

-- Removes a room from memory, without saving it (save first if required)
function forget_room(room)
	module:log("debug", "Forgetting %s", room.jid);
	rooms.save = nil;
	rooms:set(room.jid, nil);
end

-- Removes a room from the database (may remain in memory)
function delete_room(room)
	module:log("debug", "Deleting %s", room.jid);
	room_configs:set(jid_split(room.jid), nil);
	room_state:set(jid_split(room.jid), nil);
	persistent_rooms:set(nil, room.jid, nil);
	room_items_cache[room.jid] = nil;
end

function module.unload()
	for room in live_rooms() do
		room:save(nil, true);
		forget_room(room);
	end
end

function get_room_from_jid(room_jid)
	local room = rooms:get(room_jid);
	if room then
		room_hit();
		rooms:set(room_jid, room); -- bump to top;
		return room;
	end
	room_miss();
	return restore_room(room_jid);
end

local function set_room_defaults(room, lang)
	room:set_public(module:get_option_boolean("muc_room_default_public", false));
	room:set_persistent(module:get_option_boolean("muc_room_default_persistent", room:get_persistent()));
	room:set_members_only(module:get_option_boolean("muc_room_default_members_only", room:get_members_only()));
	room:set_allow_member_invites(module:get_option_boolean("muc_room_default_allow_member_invites",
		room:get_allow_member_invites()));
	room:set_moderated(module:get_option_boolean("muc_room_default_moderated", room:get_moderated()));
	room:set_whois(module:get_option_boolean("muc_room_default_public_jids",
		room:get_whois() == "anyone") and "anyone" or "moderators");
	room:set_changesubject(module:get_option_boolean("muc_room_default_change_subject", room:get_changesubject()));
	room:set_historylength(module:get_option_number("muc_room_default_history_length", room:get_historylength()));
	room:set_language(lang or module:get_option_string("muc_room_default_language"));
	room:set_presence_broadcast(module:get_option("muc_room_default_presence_broadcast", room:get_presence_broadcast()));
end

function create_room(room_jid, config)
	if jid_bare(room_jid) ~= room_jid or not jid_prep(room_jid, true) then
		return nil, "invalid-jid";
	end
	local exists = get_room_from_jid(room_jid);
	if exists then
		return nil, "room-exists";
	end
	local room = muclib.new_room(room_jid, config);
	if not config then
		set_room_defaults(room);
	end
	module:fire_event("muc-room-created", {
		room = room;
	});
	return track_room(room);
end

function all_rooms()
	return coroutine.wrap(function ()
		local seen = {}; -- Don't iterate over persistent rooms twice
		for room in live_rooms() do
			coroutine.yield(room);
			seen[room.jid] = true;
		end
		local all_persistent_rooms, err = persistent_rooms_storage:get(nil);
		if not all_persistent_rooms then
			if err then
				module:log("error", "Error loading list of persistent rooms, only rooms live in memory were iterated over");
				module:log("debug", "%s", debug.traceback(err));
			end
			return nil;
		end
		for room_jid in pairs(all_persistent_rooms) do
			if not seen[room_jid] then
				local room = restore_room(room_jid);
				if room then
					coroutine.yield(room);
				else
					module:log("error", "Missing data for room '%s', omitting from iteration", room_jid);
				end
			end
		end
	end);
end

function live_rooms()
	return rooms:values();
end

function each_room(live_only)
	if live_only then
		return live_rooms();
	end
	return all_rooms();
end

module:hook("host-disco-items", function(event)
	local reply = event.reply;
	module:log("debug", "host-disco-items called");
	if next(room_items_cache) ~= nil then
		for jid, room_name in pairs(room_items_cache) do
			reply:tag("item", { jid = jid, name = room_name }):up();
		end
	else
		for room in all_rooms() do
			if not room:get_hidden() then
				local jid, room_name = room.jid, room:get_name();
				room_items_cache[jid] = room_name;
				reply:tag("item", { jid = jid, name = room_name }):up();
			end
		end
	end
end);

module:hook("muc-room-pre-create", function (event)
	set_room_defaults(event.room, event.stanza.attr["xml:lang"]);
end, 1);

module:hook("muc-room-pre-create", function(event)
	local origin, stanza = event.origin, event.stanza;
	if not track_room(event.room) then
		origin.send(st.error_reply(stanza, "wait", "resource-constraint"));
		return true;
	end
end, -1000);

module:hook("muc-room-destroyed",function(event)
	local room = event.room;
	forget_room(room);
	delete_room(room);
end);

if module:get_option_boolean("muc_tombstones", true) then

	local ttl = module:get_option_number("muc_tombstone_expiry", 86400 * 31);

	module:hook("muc-room-destroyed",function(event)
		local room = event.room;
		if not room:get_persistent() then return end
		if room._data.destroyed then
			return -- Allow destruction of tombstone
		end

		local tombstone = new_room(room.jid, {
			locked = os.time() + ttl;
			destroyed = true;
			reason = event.reason;
			newjid = event.newjid;
			-- password?
		});
		tombstone.save = room_save;
		tombstone:set_persistent(true);
		tombstone:set_hidden(true);
		tombstone:save(true);
		return true;
	end, -10);
end

do
	local restrict_room_creation = module:get_option("restrict_room_creation");
	if restrict_room_creation == true then
		restrict_room_creation = "admin";
	end
	if restrict_room_creation then
		local host_suffix = module.host:gsub("^[^%.]+%.", "");
		module:hook("muc-room-pre-create", function(event)
			local origin, stanza = event.origin, event.stanza;
			local user_jid = stanza.attr.from;
			if not is_admin(user_jid) and not (
				restrict_room_creation == "local" and
				select(2, jid_split(user_jid)) == host_suffix
			) then
				origin.send(st.error_reply(stanza, "cancel", "not-allowed", "Room creation is restricted"));
				return true;
			end
		end);
	end
end

for event_name, method in pairs {
	-- Normal room interactions
	["iq-get/bare/http://jabber.org/protocol/disco#info:query"] = "handle_disco_info_get_query" ;
	["iq-get/bare/http://jabber.org/protocol/disco#items:query"] = "handle_disco_items_get_query" ;
	["iq-set/bare/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_set_command" ;
	["iq-get/bare/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_get_command" ;
	["iq-set/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;
	["iq-get/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_get_to_room" ;
	["message/bare"] = "handle_message_to_room" ;
	["presence/bare"] = "handle_presence_to_room" ;
	["iq/bare/jabber:iq:register:query"] = "handle_register_iq";
	-- Host room
	["iq-get/host/http://jabber.org/protocol/disco#info:query"] = "handle_disco_info_get_query" ;
	["iq-get/host/http://jabber.org/protocol/disco#items:query"] = "handle_disco_items_get_query" ;
	["iq-set/host/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_set_command" ;
	["iq-get/host/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_get_command" ;
	["iq-set/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;
	["iq-get/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_get_to_room" ;
	["message/host"] = "handle_message_to_room" ;
	["presence/host"] = "handle_presence_to_room" ;
	-- Direct to occupant (normal rooms and host room)
	["presence/full"] = "handle_presence_to_occupant" ;
	["iq/full"] = "handle_iq_to_occupant" ;
	["message/full"] = "handle_message_to_occupant" ;
} do
	module:hook(event_name, function (event)
		local origin, stanza = event.origin, event.stanza;
		local room_jid = jid_bare(stanza.attr.to);
		local room = get_room_from_jid(room_jid);

		if room and room._data.destroyed then
			if room._data.locked < os.time()
			or (is_admin(stanza.attr.from) and stanza.name == "presence" and stanza.attr.type == nil) then
				-- Allow the room to be recreated by admin or after time has passed
				delete_room(room);
				room = nil;
			else
				if stanza.attr.type ~= "error" then
					local reply = st.error_reply(stanza, "cancel", "gone", room._data.reason)
					if room._data.newjid then
						local uri = "xmpp:"..room._data.newjid.."?join";
						reply:get_child("error"):child_with_name("gone"):text(uri);
					end
					event.origin.send(reply);
				end
				return true;
			end
		end

		if room == nil then
			-- Watch presence to create rooms
			if not jid_prep(room_jid, true) then
				origin.send(st.error_reply(stanza, "modify", "jid-malformed"));
				return true;
			end
			if stanza.attr.type == nil and stanza.name == "presence" and stanza:get_child("x", "http://jabber.org/protocol/muc") then
				room = muclib.new_room(room_jid);
				return room:handle_first_presence(origin, stanza);
			elseif stanza.attr.type ~= "error" then
				origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
				return true;
			else
				return;
			end
		elseif room == false then -- Error loading room
			origin.send(st.error_reply(stanza, "wait", "resource-constraint"));
			return true;
		end
		return room[method](room, origin, stanza);
	end, -2)
end

function shutdown_component()
	for room in live_rooms() do
		room:save(nil, true);
	end
end
module:hook_global("server-stopping", shutdown_component, -300);

do -- Ad-hoc commands
	module:depends "adhoc";
	local t_concat = table.concat;
	local adhoc_new = module:require "adhoc".new;
	local adhoc_initial = require "util.adhoc".new_initial_data_form;
	local array = require "util.array";
	local dataforms_new = require "util.dataforms".new;

	local destroy_rooms_layout = dataforms_new {
		title = "Destroy rooms";
		instructions = "Select the rooms to destroy";

		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/muc#destroy" };
		{ name = "rooms", type = "list-multi", required = true, label = "Rooms to destroy:"};
	};

	local destroy_rooms_handler = adhoc_initial(destroy_rooms_layout, function()
		return { rooms = array.collect(all_rooms()):pluck("jid"):sort(); };
	end, function(fields, errors)
		if errors then
			local errmsg = {};
			for field, err in pairs(errors) do
				errmsg[#errmsg + 1] = field .. ": " .. err;
			end
			return { status = "completed", error = { message = t_concat(errmsg, "\n") } };
		end
		for _, room in ipairs(fields.rooms) do
			get_room_from_jid(room):destroy();
		end
		return { status = "completed", info = "The following rooms were destroyed:\n"..t_concat(fields.rooms, "\n") };
	end);
	local destroy_rooms_desc = adhoc_new("Destroy Rooms",
		"http://prosody.im/protocol/muc#destroy", destroy_rooms_handler, "admin");

	module:provides("adhoc", destroy_rooms_desc);
end