2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
9 local log = module._log;
11 local require = require;
12 local pairs, ipairs = pairs, ipairs;
13 local t_concat, t_insert = table.concat, table.insert;
14 local s_find = string.find;
15 local tonumber = tonumber;
17 local st = require "util.stanza";
18 local jid_split = require "util.jid".split;
19 local jid_bare = require "util.jid".bare;
23 local rostermanager = require "core.rostermanager";
24 local sessionmanager = require "core.sessionmanager";
25 local offlinemanager = require "core.offlinemanager";
27 local function select_top_resources(user)
29 local recipients = {};
30 for _, session in pairs(user.sessions) do -- find resource with greatest priority
31 if session.presence then
32 -- TODO check active privacy list for session
33 local p = session.priority;
36 recipients = {session};
37 elseif p == priority then
38 t_insert(recipients, session);
44 local function recalc_resource_map(user)
46 user.top_resources = select_top_resources(user);
47 if #user.top_resources == 0 then user.top_resources = nil; end
51 local ignore_presence_priority = module:get_option("ignore_presence_priority");
53 function handle_normal_presence(origin, stanza)
54 if ignore_presence_priority then
55 local priority = stanza:child_with_name("priority");
56 if priority and priority[1] ~= "0" then
57 for i=#priority.tags,1,-1 do priority.tags[i] = nil; end
58 for i=#priority,1,-1 do priority[i] = nil; end
62 if full_sessions[origin.full_jid] then -- if user is still connected
63 origin.send(stanza); -- reflect their presence back to them
65 local roster = origin.roster;
66 local node, host = origin.username, origin.host;
67 local user = bare_sessions[node.."@"..host];
68 for _, res in pairs(user and user.sessions or NULL) do -- broadcast to all resources
69 if res ~= origin and res.presence then -- to resource
70 stanza.attr.to = res.full_jid;
71 core_post_stanza(origin, stanza, true);
74 for jid, item in pairs(roster) do -- broadcast to all interested contacts
75 if item.subscription == "both" or item.subscription == "from" then
77 core_post_stanza(origin, stanza, true);
80 if stanza.attr.type == nil and not origin.presence then -- initial presence
81 origin.presence = stanza; -- FIXME repeated later
82 local probe = st.presence({from = origin.full_jid, type = "probe"});
83 for jid, item in pairs(roster) do -- probe all contacts we are subscribed to
84 if item.subscription == "both" or item.subscription == "to" then
86 core_post_stanza(origin, probe, true);
89 for _, res in pairs(user and user.sessions or NULL) do -- broadcast from all available resources
90 if res ~= origin and res.presence then
91 res.presence.attr.to = origin.full_jid;
92 core_post_stanza(res, res.presence, true);
93 res.presence.attr.to = nil;
96 if roster.pending then -- resend incoming subscription requests
97 for jid in pairs(roster.pending) do
98 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original?
101 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host});
102 for jid, item in pairs(roster) do -- resend outgoing subscription requests
104 request.attr.to = jid;
105 core_post_stanza(origin, request, true);
108 local offline = offlinemanager.load(node, host);
110 for _, msg in ipairs(offline) do
111 origin.send(msg); -- FIXME do we need to modify to/from in any way?
113 offlinemanager.deleteAll(node, host);
116 if stanza.attr.type == "unavailable" then
117 origin.presence = nil;
118 if origin.priority then
119 origin.priority = nil;
120 recalc_resource_map(user);
122 if origin.directed then
123 for jid in pairs(origin.directed) do
124 stanza.attr.to = jid;
125 core_post_stanza(origin, stanza, true);
127 origin.directed = nil;
130 origin.presence = stanza;
131 local priority = stanza:child_with_name("priority");
132 if priority and #priority > 0 then
133 priority = t_concat(priority);
134 if s_find(priority, "^[+-]?[0-9]+$") then
135 priority = tonumber(priority);
136 if priority < -128 then priority = -128 end
137 if priority > 127 then priority = 127 end
138 else priority = 0; end
139 else priority = 0; end
140 if origin.priority ~= priority then
141 origin.priority = priority;
142 recalc_resource_map(user);
145 stanza.attr.to = nil; -- reset it
148 function send_presence_of_available_resources(user, host, jid, recipient_session, stanza)
149 local h = hosts[host];
151 if h and h.type == "local" then
152 local u = h.sessions[user];
154 for k, session in pairs(u.sessions) do
155 local pres = session.presence;
157 if stanza then pres = stanza; pres.attr.from = session.full_jid; end
159 core_post_stanza(session, pres, true);
166 log("debug", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid);
170 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare)
171 local node, host = jid_split(from_bare);
172 if to_bare == from_bare then return; end -- No self contacts
173 local st_from, st_to = stanza.attr.from, stanza.attr.to;
174 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
175 log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
176 if stanza.attr.type == "probe" then
177 stanza.attr.from, stanza.attr.to = st_from, st_to;
179 elseif stanza.attr.type == "subscribe" then
181 -- 2. roster push (subscription = none, ask = subscribe)
182 if rostermanager.set_contact_pending_out(node, host, to_bare) then
183 rostermanager.roster_push(node, host, to_bare);
184 end -- else file error
185 core_post_stanza(origin, stanza);
186 elseif stanza.attr.type == "unsubscribe" then
188 -- 2. roster push (subscription = none or from)
189 if rostermanager.unsubscribe(node, host, to_bare) then
190 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed?
191 end -- else file error
192 core_post_stanza(origin, stanza);
193 elseif stanza.attr.type == "subscribed" then
196 -- 3. send_presence_of_available_resources
197 if rostermanager.subscribed(node, host, to_bare) then
198 rostermanager.roster_push(node, host, to_bare);
200 core_post_stanza(origin, stanza);
201 send_presence_of_available_resources(node, host, to_bare, origin);
202 elseif stanza.attr.type == "unsubscribed" then
204 -- 2. roster push (subscription = none or to)
205 if rostermanager.unsubscribed(node, host, to_bare) then
206 rostermanager.roster_push(node, host, to_bare);
208 core_post_stanza(origin, stanza);
210 stanza.attr.from, stanza.attr.to = st_from, st_to;
214 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare)
215 local node, host = jid_split(to_bare);
216 local st_from, st_to = stanza.attr.from, stanza.attr.to;
217 stanza.attr.from, stanza.attr.to = from_bare, to_bare;
218 log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
220 if stanza.attr.type == "probe" then
221 local result, err = rostermanager.is_contact_subscribed(node, host, from_bare);
223 if 0 == send_presence_of_available_resources(node, host, st_from, origin) then
224 core_post_stanza(hosts[host], st.presence({from=to_bare, to=st_from, type="unavailable"}), true); -- TODO send last activity
227 core_post_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unsubscribed"}), true);
229 elseif stanza.attr.type == "subscribe" then
230 if rostermanager.is_contact_subscribed(node, host, from_bare) then
231 core_post_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="subscribed"}), true); -- already subscribed
232 -- Sending presence is not clearly stated in the RFC, but it seems appropriate
233 if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then
234 core_post_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unavailable"}), true); -- TODO send last activity
237 core_post_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unavailable"}), true); -- acknowledging receipt
238 if not rostermanager.is_contact_pending_in(node, host, from_bare) then
239 if rostermanager.set_contact_pending_in(node, host, from_bare) then
240 sessionmanager.send_to_available_resources(node, host, stanza);
241 end -- TODO else return error, unable to save
244 elseif stanza.attr.type == "unsubscribe" then
245 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then
246 sessionmanager.send_to_interested_resources(node, host, stanza);
247 rostermanager.roster_push(node, host, from_bare);
249 elseif stanza.attr.type == "subscribed" then
250 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
251 sessionmanager.send_to_interested_resources(node, host, stanza);
252 rostermanager.roster_push(node, host, from_bare);
254 elseif stanza.attr.type == "unsubscribed" then
255 if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then
256 sessionmanager.send_to_interested_resources(node, host, stanza);
257 rostermanager.roster_push(node, host, from_bare);
259 end -- discard any other type
260 stanza.attr.from, stanza.attr.to = st_from, st_to;
264 local outbound_presence_handler = function(data)
265 -- outbound presence recieved
266 local origin, stanza = data.origin, data.stanza;
268 local to = stanza.attr.to;
270 local t = stanza.attr.type;
271 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes
272 return handle_outbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to));
275 local to_bare = jid_bare(to);
276 local roster = origin.roster;
277 if roster and not(roster[to_bare] and (roster[to_bare].subscription == "both" or roster[to_bare].subscription == "from")) then -- directed presence
278 origin.directed = origin.directed or {};
279 if t then -- removing from directed presence list on sending an error or unavailable
280 origin.directed[to] = nil; -- FIXME does it make more sense to add to_bare rather than to?
282 origin.directed[to] = true; -- FIXME does it make more sense to add to_bare rather than to?
285 end -- TODO maybe handle normal presence here, instead of letting it pass to incoming handlers?
288 module:hook("pre-presence/full", outbound_presence_handler);
289 module:hook("pre-presence/bare", outbound_presence_handler);
290 module:hook("pre-presence/host", outbound_presence_handler);
292 module:hook("presence/bare", function(data)
293 -- inbound presence to bare JID recieved
294 local origin, stanza = data.origin, data.stanza;
296 local to = stanza.attr.to;
297 local t = stanza.attr.type;
299 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to bare JID
300 return handle_inbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to));
303 local user = bare_sessions[to];
305 for _, session in pairs(user.sessions) do
306 if session.presence then -- only send to available resources
307 session.send(stanza);
310 end -- no resources not online, discard
311 elseif not t or t == "unavailable" then
312 handle_normal_presence(origin, stanza);
316 module:hook("presence/full", function(data)
317 -- inbound presence to full JID recieved
318 local origin, stanza = data.origin, data.stanza;
320 local t = stanza.attr.type;
321 if t ~= nil and t ~= "unavailable" and t ~= "error" then -- check for subscriptions and probes sent to full JID
322 return handle_inbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to));
325 local session = full_sessions[stanza.attr.to];
327 -- TODO fire post processing event
328 session.send(stanza);
329 end -- resource not online, discard
332 module:hook("presence/host", function(data)
333 -- inbound presence to the host
334 local origin, stanza = data.origin, data.stanza;
336 local from_bare = jid_bare(stanza.attr.from);
337 local t = stanza.attr.type;
339 core_post_stanza(hosts[module.host], st.presence({ from = module.host, to = from_bare, id = stanza.attr.id }));
340 elseif t == "subscribe" then
341 core_post_stanza(hosts[module.host], st.presence({ from = module.host, to = from_bare, id = stanza.attr.id, type = "subscribed" }));
342 core_post_stanza(hosts[module.host], st.presence({ from = module.host, to = from_bare, id = stanza.attr.id }));
347 module:hook("resource-unbind", function(event)
348 local session, err = event.session, event.error;
349 -- Send unavailable presence
350 if session.presence then
351 local pres = st.presence{ type = "unavailable" };
352 if not(err) or err == "closed" then err = "connection closed"; end
353 pres:tag("status"):text("Disconnected: "..err):up();
354 session:dispatch_stanza(pres);
355 elseif session.directed then
356 local pres = st.presence{ type = "unavailable", from = session.full_jid };
357 if not(err) or err == "closed" then err = "connection closed"; end
358 pres:tag("status"):text("Disconnected: "..err):up();
359 for jid in pairs(session.directed) do
361 core_post_stanza(session, pres, true);
363 session.directed = nil;