Mon, 07 Sep 2009 20:27:52 +0500
MUC: Send appropriate error to banned users on join.
1734 | 1 | -- Prosody IM |
2 | -- Copyright (C) 2008-2009 Matthew Wild | |
3 | -- Copyright (C) 2008-2009 Waqas Hussain | |
4 | -- | |
5 | -- This project is MIT/X11 licensed. Please see the | |
6 | -- COPYING file in the source package for more information. | |
7 | -- | |
8 | ||
9 | local datamanager = require "util.datamanager"; | |
10 | local datetime = require "util.datetime"; | |
11 | ||
12 | local jid_split = require "util.jid".split; | |
13 | local jid_bare = require "util.jid".bare; | |
14 | local st = require "util.stanza"; | |
15 | local log = require "util.logger".init("mod_muc"); | |
16 | local multitable_new = require "util.multitable".new; | |
17 | local t_insert, t_remove = table.insert, table.remove; | |
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18 | local setmetatable = setmetatable; |
1734 | 19 | |
20 | local muc_domain = nil; --module:get_host(); | |
21 | local history_length = 20; | |
22 | ||
23 | ------------ | |
24 | local function filter_xmlns_from_array(array, filters) | |
25 | local count = 0; | |
26 | for i=#array,1,-1 do | |
27 | local attr = array[i].attr; | |
28 | if filters[attr and attr.xmlns] then | |
29 | t_remove(array, i); | |
30 | count = count + 1; | |
31 | end | |
32 | end | |
33 | return count; | |
34 | end | |
35 | local function filter_xmlns_from_stanza(stanza, filters) | |
36 | if filters then | |
37 | if filter_xmlns_from_array(stanza.tags, filters) ~= 0 then | |
38 | return stanza, filter_xmlns_from_array(stanza, filters); | |
39 | end | |
40 | end | |
41 | return stanza, 0; | |
42 | end | |
43 | local presence_filters = {["http://jabber.org/protocol/muc"]=true;["http://jabber.org/protocol/muc#user"]=true}; | |
44 | local function get_filtered_presence(stanza) | |
45 | return filter_xmlns_from_stanza(st.clone(stanza), presence_filters); | |
46 | end | |
47 | local kickable_error_conditions = { | |
48 | ["gone"] = true; | |
49 | ["internal-server-error"] = true; | |
50 | ["item-not-found"] = true; | |
51 | ["jid-malformed"] = true; | |
52 | ["recipient-unavailable"] = true; | |
53 | ["redirect"] = true; | |
54 | ["remote-server-not-found"] = true; | |
55 | ["remote-server-timeout"] = true; | |
56 | ["service-unavailable"] = true; | |
57 | }; | |
58 | local function get_kickable_error(stanza) | |
59 | for _, tag in ipairs(stanza.tags) do | |
60 | if tag.name == "error" and tag.attr.xmlns == "jabber:client" then | |
61 | for _, cond in ipairs(tag.tags) do | |
62 | if cond.attr.xmlns == "urn:ietf:params:xml:ns:xmpp-stanzas" then | |
63 | return kickable_error_conditions[cond.name] and cond.name; | |
64 | end | |
65 | end | |
66 | return true; -- malformed error message | |
67 | end | |
68 | end | |
69 | return true; -- malformed error message | |
70 | end | |
71 | local function getUsingPath(stanza, path, getText) | |
72 | local tag = stanza; | |
73 | for _, name in ipairs(path) do | |
74 | if type(tag) ~= 'table' then return; end | |
75 | tag = tag:child_with_name(name); | |
76 | end | |
77 | if tag and getText then tag = table.concat(tag); end | |
78 | return tag; | |
79 | end | |
80 | local function getTag(stanza, path) return getUsingPath(stanza, path); end | |
81 | local function getText(stanza, path) return getUsingPath(stanza, path, true); end | |
82 | ----------- | |
83 | ||
84 | --[[function get_room_disco_info(room, stanza) | |
85 | return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info") | |
86 | :tag("identity", {category='conference', type='text', name=room._data["name"]):up() | |
87 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply | |
88 | end | |
89 | function get_room_disco_items(room, stanza) | |
90 | return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items"); | |
91 | end -- TODO allow non-private rooms]] | |
92 | ||
93 | -- | |
94 | ||
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95 | local room_mt = {}; |
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96 | room_mt.__index = room_mt; |
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97 | |
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98 | function room_mt:get_default_role(affiliation) |
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99 | if affiliation == "owner" or affiliation == "admin" then |
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100 | return "moderator"; |
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101 | elseif affiliation == "member" or not affiliation then |
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102 | return "participant"; |
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103 | end |
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104 | end |
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105 | |
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106 | function room_mt:broadcast_presence(stanza, code, nick) |
1734 | 107 | stanza = get_filtered_presence(stanza); |
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108 | local data = self._occupants[stanza.attr.from]; |
1734 | 109 | stanza:tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) |
110 | :tag("item", {affiliation=data.affiliation, role=data.role, nick=nick}):up(); | |
111 | if code then | |
112 | stanza:tag("status", {code=code}):up(); | |
113 | end | |
114 | local me; | |
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115 | for occupant, o_data in pairs(self._occupants) do |
1734 | 116 | if occupant ~= stanza.attr.from then |
117 | for jid in pairs(o_data.sessions) do | |
118 | stanza.attr.to = jid; | |
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119 | self:route_stanza(stanza); |
1734 | 120 | end |
121 | else | |
122 | me = o_data; | |
123 | end | |
124 | end | |
125 | if me then | |
126 | stanza:tag("status", {code='110'}); | |
127 | for jid in pairs(me.sessions) do | |
128 | stanza.attr.to = jid; | |
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129 | self:route_stanza(stanza); |
1734 | 130 | end |
131 | end | |
132 | end | |
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133 | function room_mt:broadcast_message(stanza, historic) |
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134 | for occupant, o_data in pairs(self._occupants) do |
1734 | 135 | for jid in pairs(o_data.sessions) do |
136 | stanza.attr.to = jid; | |
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137 | self:route_stanza(stanza); |
1734 | 138 | end |
139 | end | |
140 | if historic then -- add to history | |
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141 | local history = self._data['history']; |
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142 | if not history then history = {}; self._data['history'] = history; end |
1734 | 143 | -- stanza = st.clone(stanza); |
144 | stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = muc_domain, stamp = datetime.datetime()}):up(); -- XEP-0203 | |
145 | stanza:tag("x", {xmlns = "jabber:x:delay", from = muc_domain, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated) | |
146 | t_insert(history, st.clone(st.preserialize(stanza))); | |
147 | while #history > history_length do t_remove(history, 1) end | |
148 | end | |
149 | end | |
150 | ||
151 | ||
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152 | function room_mt:send_occupant_list(to) |
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153 | local current_nick = self._jid_nick[to]; |
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154 | for occupant, o_data in pairs(self._occupants) do |
1734 | 155 | if occupant ~= current_nick then |
156 | local pres = get_filtered_presence(o_data.sessions[o_data.jid]); | |
157 | pres.attr.to, pres.attr.from = to, occupant; | |
158 | pres:tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) | |
159 | :tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up(); | |
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160 | self:route_stanza(pres); |
1734 | 161 | end |
162 | end | |
163 | end | |
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164 | function room_mt:send_history(to) |
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165 | local history = self._data['history']; -- send discussion history |
1734 | 166 | if history then |
167 | for _, msg in ipairs(history) do | |
168 | msg = st.deserialize(msg); | |
169 | msg.attr.to=to; | |
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170 | self:route_stanza(msg); |
1734 | 171 | end |
172 | end | |
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173 | if self._data['subject'] then |
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174 | self:route_stanza(st.message({type='groupchat', from=self.jid, to=to}):tag("subject"):text(self._data['subject'])); |
1734 | 175 | end |
176 | end | |
177 | ||
178 | local function room_get_disco_info(self, stanza) end | |
179 | local function room_get_disco_items(self, stanza) end | |
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180 | function room_mt:set_subject(current_nick, subject) |
1734 | 181 | -- TODO check nick's authority |
182 | if subject == "" then subject = nil; end | |
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183 | self._data['subject'] = subject; |
1734 | 184 | local msg = st.message({type='groupchat', from=current_nick}) |
185 | :tag('subject'):text(subject):up(); | |
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186 | self:broadcast_message(msg, false); |
1734 | 187 | return true; |
188 | end | |
189 | ||
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190 | function room_mt:handle_to_occupant(origin, stanza) -- PM, vCards, etc |
1734 | 191 | local from, to = stanza.attr.from, stanza.attr.to; |
192 | local room = jid_bare(to); | |
193 | local current_nick = self._jid_nick[from]; | |
194 | local type = stanza.attr.type; | |
195 | log("debug", "room: %s, current_nick: %s, stanza: %s", room or "nil", current_nick or "nil", stanza:top_tag()); | |
196 | if (select(2, jid_split(from)) == muc_domain) then error("Presence from the MUC itself!!!"); end | |
197 | if stanza.name == "presence" then | |
198 | local pr = get_filtered_presence(stanza); | |
199 | pr.attr.from = current_nick; | |
200 | if type == "error" then -- error, kick em out! | |
201 | if current_nick then | |
202 | log("debug", "kicking %s from %s", current_nick, room); | |
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203 | self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}) |
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204 | :tag('status'):text('This participant is kicked from the room because he sent an error presence')); -- send unavailable |
1734 | 205 | end |
206 | elseif type == "unavailable" then -- unavailable | |
207 | if current_nick then | |
208 | log("debug", "%s leaving %s", current_nick, room); | |
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209 | local data = self._occupants[current_nick]; |
1734 | 210 | data.role = 'none'; |
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211 | self:broadcast_presence(pr); |
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212 | self._occupants[current_nick] = nil; |
1734 | 213 | self._jid_nick[from] = nil; |
214 | end | |
215 | elseif not type then -- available | |
216 | if current_nick then | |
217 | --if #pr == #stanza or current_nick ~= to then -- commented because google keeps resending directed presence | |
218 | if current_nick == to then -- simple presence | |
219 | log("debug", "%s broadcasted presence", current_nick); | |
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220 | self._occupants[current_nick].sessions[from] = pr; |
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221 | self:broadcast_presence(pr); |
1734 | 222 | else -- change nick |
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223 | if self._occupants[to] then |
1734 | 224 | log("debug", "%s couldn't change nick", current_nick); |
225 | origin.send(st.error_reply(stanza, "cancel", "conflict"):tag("x", {xmlns = "http://jabber.org/protocol/muc"})); | |
226 | else | |
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227 | local data = self._occupants[current_nick]; |
1734 | 228 | local to_nick = select(3, jid_split(to)); |
229 | if to_nick then | |
230 | log("debug", "%s (%s) changing nick to %s", current_nick, data.jid, to); | |
231 | local p = st.presence({type='unavailable', from=current_nick}); | |
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232 | self:broadcast_presence(p, '303', to_nick); |
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233 | self._occupants[current_nick] = nil; |
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234 | self._occupants[to] = data; |
1734 | 235 | self._jid_nick[from] = to; |
236 | pr.attr.from = to; | |
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237 | self._occupants[to].sessions[from] = pr; |
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238 | self:broadcast_presence(pr); |
1734 | 239 | else |
240 | --TODO malformed-jid | |
241 | end | |
242 | end | |
243 | end | |
244 | --else -- possible rejoin | |
245 | -- log("debug", "%s had connection replaced", current_nick); | |
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246 | -- self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}) |
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247 | -- :tag('status'):text('Replaced by new connection'):up()); -- send unavailable |
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248 | -- self:handle_to_occupant(origin, stanza); -- resend available |
1734 | 249 | --end |
250 | else -- enter room | |
251 | local new_nick = to; | |
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252 | if self._occupants[to] then |
1734 | 253 | new_nick = nil; |
254 | end | |
255 | if not new_nick then | |
256 | log("debug", "%s couldn't join due to nick conflict: %s", from, to); | |
257 | origin.send(st.error_reply(stanza, "cancel", "conflict"):tag("x", {xmlns = "http://jabber.org/protocol/muc"})); | |
258 | else | |
259 | log("debug", "%s joining as %s", from, to); | |
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260 | if not next(self._affiliations) then -- new room, no owners |
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261 | self._affiliations[jid_bare(from)] = "owner"; |
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262 | end |
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263 | local affiliation = self:get_affiliation(from); |
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264 | local role = self:get_default_role(affiliation) |
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265 | if role then -- new occupant |
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266 | self._occupants[to] = {affiliation=affiliation, role=role, jid=from, sessions={[from]=get_filtered_presence(stanza)}}; |
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267 | self._jid_nick[from] = to; |
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268 | self:send_occupant_list(from); |
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269 | pr.attr.from = to; |
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270 | self:broadcast_presence(pr); |
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271 | self:send_history(from); |
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272 | else -- banned |
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273 | origin.send(st.error_reply(stanza, "auth", "forbidden"):tag("x", {xmlns = "http://jabber.org/protocol/muc"})); |
1734 | 274 | end |
275 | end | |
276 | end | |
277 | elseif type ~= 'result' then -- bad type | |
278 | origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error? | |
279 | end | |
280 | elseif not current_nick and type ~= "error" and type ~= "result" then -- not in room | |
281 | origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); | |
282 | elseif stanza.name == "message" and type == "groupchat" then -- groupchat messages not allowed in PM | |
283 | origin.send(st.error_reply(stanza, "modify", "bad-request")); | |
284 | elseif stanza.name == "message" and type == "error" and get_kickable_error(stanza) then | |
285 | log("debug", "%s kicked from %s for sending an error message", current_nick, room); | |
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286 | self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}):tag('status'):text('This participant is kicked from the room because he sent an error message to another occupant')); -- send unavailable |
1734 | 287 | else -- private stanza |
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288 | local o_data = self._occupants[to]; |
1734 | 289 | if o_data then |
290 | log("debug", "%s sent private stanza to %s (%s)", from, to, o_data.jid); | |
291 | local jid = o_data.jid; | |
292 | -- TODO if stanza.name=='iq' and type=='get' and stanza.tags[1].attr.xmlns == 'vcard-temp' then jid = jid_bare(jid); end | |
293 | stanza.attr.to, stanza.attr.from = jid, current_nick; | |
294 | self:route_stanza(stanza); | |
295 | elseif type ~= "error" and type ~= "result" then -- recipient not in room | |
296 | origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room")); | |
297 | end | |
298 | end | |
299 | end | |
300 | ||
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301 | function room_mt:handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc |
1734 | 302 | local type = stanza.attr.type; |
303 | if stanza.name == "iq" and type == "get" then -- disco requests | |
304 | local xmlns = stanza.tags[1].attr.xmlns; | |
305 | if xmlns == "http://jabber.org/protocol/disco#info" then | |
306 | origin.send(room_get_disco_info(self, stanza)); | |
307 | elseif xmlns == "http://jabber.org/protocol/disco#items" then | |
308 | origin.send(room_get_disco_items(self, stanza)); | |
309 | else | |
310 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); | |
311 | end | |
312 | elseif stanza.name == "message" and type == "groupchat" then | |
313 | local from, to = stanza.attr.from, stanza.attr.to; | |
314 | local room = jid_bare(to); | |
315 | local current_nick = self._jid_nick[from]; | |
316 | if not current_nick then -- not in room | |
317 | origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); | |
318 | else | |
319 | local from = stanza.attr.from; | |
320 | stanza.attr.from = current_nick; | |
321 | local subject = getText(stanza, {"subject"}); | |
322 | if subject then | |
323 | self:set_subject(current_nick, subject); -- TODO use broadcast_message_stanza | |
324 | else | |
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325 | self:broadcast_message(stanza, true); |
1734 | 326 | end |
327 | end | |
328 | elseif stanza.name == "presence" then -- hack - some buggy clients send presence updates to the room rather than their nick | |
329 | local to = stanza.attr.to; | |
330 | local current_nick = self._jid_nick[stanza.attr.from]; | |
331 | if current_nick then | |
332 | stanza.attr.to = current_nick; | |
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333 | self:handle_to_occupant(origin, stanza); |
1734 | 334 | stanza.attr.to = to; |
335 | elseif type ~= "error" and type ~= "result" then | |
336 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); | |
337 | end | |
338 | elseif stanza.name == "message" and not stanza.attr.type and #stanza.tags == 1 and self._jid_nick[stanza.attr.from] | |
339 | and stanza.tags[1].name == "x" and stanza.tags[1].attr.xmlns == "http://jabber.org/protocol/muc#user" and #stanza.tags[1].tags == 1 | |
340 | and stanza.tags[1].tags[1].name == "invite" and stanza.tags[1].tags[1].attr.to then | |
341 | local _from, _to = stanza.attr.from, stanza.attr.to; | |
342 | local _invitee = stanza.tags[1].tags[1].attr.to; | |
343 | stanza.attr.from, stanza.attr.to = _to, _invitee; | |
344 | stanza.tags[1].tags[1].attr.from, stanza.tags[1].tags[1].attr.to = _from, nil; | |
345 | self:route_stanza(stanza); | |
346 | stanza.tags[1].tags[1].attr.from, stanza.tags[1].tags[1].attr.to = nil, _invitee; | |
347 | stanza.attr.from, stanza.attr.to = _from, _to; | |
348 | else | |
349 | if type == "error" or type == "result" then return; end | |
350 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); | |
351 | end | |
352 | end | |
353 | ||
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354 | function room_mt:handle_stanza(origin, stanza) |
1734 | 355 | local to_node, to_host, to_resource = jid_split(stanza.attr.to); |
356 | if to_resource then | |
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357 | self:handle_to_occupant(origin, stanza); |
1734 | 358 | else |
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359 | self:handle_to_room(origin, stanza); |
1734 | 360 | end |
361 | end | |
362 | ||
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363 | function room_mt:route_stanza(stanza) end -- Replace with a routing function, e.g., function(room, stanza) core_route_stanza(origin, stanza); end |
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364 | |
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365 | function room_mt:get_affiliation(jid) |
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366 | local node, host, resource = jid_split(jid); |
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367 | local bare = node and node.."@"..host or host; |
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368 | local result = self._affiliations[bare]; -- Affiliations are granted, revoked, and maintained based on the user's bare JID. |
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369 | if not result and self._affiliations[host] == "outcast" then result = "outcast"; end -- host banned |
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370 | return result; |
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371 | end |
1734 | 372 | |
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373 | function room_mt:set_affiliation(jid, affiliation) |
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374 | local node, host, resource = jid_split(jid); |
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375 | local bare = node and node.."@"..host or host; |
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376 | if affiliation == "none" then affiliation = nil; end |
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377 | if affiliation and affiliation ~= "outcast" and affiliation ~= "owner" and affiliation ~= "admin" and affiliation ~= "member" then return false; end |
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378 | self._affiliations[bare] = affiliation; |
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379 | -- TODO set roles based on new affiliation |
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380 | return true; |
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381 | end |
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382 | |
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383 | local _M = {}; -- module "muc" |
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384 | |
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385 | function _M:new_room(jid) |
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386 | return setmetatable({ |
1734 | 387 | jid = jid; |
388 | _jid_nick = {}; | |
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389 | _occupants = {}; |
1734 | 390 | _data = {}; |
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391 | _affiliations = {}; |
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392 | }, room_mt); |
1734 | 393 | end |
394 | ||
395 | return _M; | |
396 | ||
397 | --[[function get_disco_info(stanza) | |
398 | return st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info") | |
399 | :tag("identity", {category='conference', type='text', name=muc_name}):up() | |
400 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply | |
401 | end | |
402 | function get_disco_items(stanza) | |
403 | local reply = st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items"); | |
404 | for room in pairs(rooms_info:get()) do | |
405 | reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up(); | |
406 | end | |
407 | return reply; -- TODO cache disco reply | |
408 | end]] | |
409 | ||
410 | --[[function handle_to_domain(origin, stanza) | |
411 | local type = stanza.attr.type; | |
412 | if type == "error" or type == "result" then return; end | |
413 | if stanza.name == "iq" and type == "get" then | |
414 | local xmlns = stanza.tags[1].attr.xmlns; | |
415 | if xmlns == "http://jabber.org/protocol/disco#info" then | |
416 | origin.send(get_disco_info(stanza)); | |
417 | elseif xmlns == "http://jabber.org/protocol/disco#items" then | |
418 | origin.send(get_disco_items(stanza)); | |
419 | else | |
420 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc | |
421 | end | |
422 | else | |
423 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it")); | |
424 | end | |
425 | end | |
426 | ||
427 | register_component(muc_domain, function(origin, stanza) | |
428 | local to_node, to_host, to_resource = jid_split(stanza.attr.to); | |
429 | if to_resource and not to_node then | |
430 | if type == "error" or type == "result" then return; end | |
431 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource | |
432 | elseif to_resource then | |
433 | handle_to_occupant(origin, stanza); | |
434 | elseif to_node then | |
435 | handle_to_room(origin, stanza) | |
436 | else -- to the main muc domain | |
437 | if type == "error" or type == "result" then return; end | |
438 | handle_to_domain(origin, stanza); | |
439 | end | |
440 | end);]] | |
441 | ||
442 | --[[module.unload = function() | |
443 | deregister_component(muc_domain); | |
444 | end | |
445 | module.save = function() | |
446 | return {rooms = rooms.data; jid_nick = jid_nick.data; rooms_info = rooms_info.data; persist_list = persist_list}; | |
447 | end | |
448 | module.restore = function(data) | |
449 | rooms.data, jid_nick.data, rooms_info.data, persist_list = | |
450 | data.rooms or {}, data.jid_nick or {}, data.rooms_info or {}, data.persist_list or {}; | |
451 | end]] |