2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
11 local log = require "util.logger".init("stanzarouter")
13 local hosts = _G.hosts;
15 local st = require "util.stanza";
16 local send_s2s = require "core.s2smanager".send_to_host;
17 local user_exists = require "core.usermanager".user_exists;
19 local rostermanager = require "core.rostermanager";
20 local sessionmanager = require "core.sessionmanager";
21 local offlinemanager = require "core.offlinemanager";
23 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
24 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
26 local modules_handle_stanza = require "core.modulemanager".handle_stanza;
27 local component_handle_stanza = require "core.componentmanager".handle_stanza;
29 local handle_outbound_presence_subscriptions_and_probes = function()end;--require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
30 local handle_inbound_presence_subscriptions_and_probes = function()end;--require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
31 local handle_normal_presence = function()end;--require "core.presencemanager".handle_normal_presence;
33 local format = string.format;
34 local tostring = tostring;
35 local t_concat = table.concat;
36 local t_insert = table.insert;
37 local tonumber = tonumber;
38 local s_find = string.find;
40 local ipairs = ipairs;
42 local jid_split = require "util.jid".split;
43 local jid_prepped_split = require "util.jid".prepped_split;
45 local fire_event = require "core.eventmanager2".fire_event;
47 local select_best_resources;
49 function core_process_stanza(origin, stanza)
50 (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
52 -- Currently we guarantee every stanza to have an xmlns, should we keep this rule?
53 if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end
55 -- TODO verify validity of stanza (as well as JID validity)
56 if stanza.attr.type == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
57 if stanza.name == "iq" then
58 if (stanza.attr.type == "set" or stanza.attr.type == "get") and #stanza.tags ~= 1 then
59 origin.send(st.error_reply(stanza, "modify", "bad-request"));
64 if origin.type == "c2s" and not origin.full_jid
65 and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
66 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
67 error("Client MUST bind resource after auth");
70 -- TODO also, stanzas should be returned to their original state before the function ends
71 if origin.type == "c2s" then
72 stanza.attr.from = origin.full_jid;
74 local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
75 local from = stanza.attr.from;
76 local node, host, resource;
77 local from_node, from_host, from_resource;
78 local to_bare, from_bare;
80 node, host, resource = jid_prepped_split(to);
82 log("warn", "Received stanza with invalid destination JID: %s", to);
83 origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The destination address is invalid: "..to));
86 to_bare = node and (node.."@"..host) or host; -- bare JID
87 if resource then to = to_bare.."/"..resource; else to = to_bare; end
91 -- We only stamp the 'from' on c2s stanzas, so we still need to check validity
92 from_node, from_host, from_resource = jid_prepped_split(from);
94 log("warn", "Received stanza with invalid source JID: %s", from);
95 origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The source address is invalid: "..from));
98 from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
99 if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
100 stanza.attr.from = from;
103 --[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
104 log("warn", "stanza recieved for a non-local server");
105 return; -- FIXME what should we do here?
108 if (origin.type == "s2sin" or origin.type == "c2s" or origin.type == "component") and xmlns == "jabber:client" then
109 if origin.type == "s2sin" and not origin.dummy then
110 local host_status = origin.hosts[from_host];
111 if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
112 log("warn", "Received a stanza claiming to be from %s, over a stream authed for %s!", from_host, origin.from_host);
113 return; -- FIXME what should we do here? does this work with subdomains?
116 core_post_stanza(origin, stanza);
118 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
122 function core_post_stanza(origin, stanza)
123 local to = stanza.attr.to;
124 local node, host, resource = jid_split(to);
125 local to_bare = node and (node.."@"..host) or host; -- bare JID
142 local event_data = {origin=origin, stanza=stanza};
143 if origin.full_jid then -- c2s connection
144 if hosts[origin.host].events.fire_event('pre-'..stanza.name..to_type, event_data); then return; end -- do preprocessing
146 local h = hosts[to_bare] or hosts[host or origin.host];
148 if h.type == "component" then
149 component_handle_stanza(origin, stanza);
152 if h.events.fire_event(stanza.name..to_type, event_data); then return; end -- do processing
154 else -- non-local recipient
155 core_route_stanza(origin, stanza);
159 if host and fire_event(host.."/"..stanza.name, event_data) then
161 elseif stanza.name == "presence" and origin.host and fire_event(origin.host.."/"..stanza.name, event_data) then
164 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
165 elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
166 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
167 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
168 component_handle_stanza(origin, stanza);
169 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
170 component_handle_stanza(origin, stanza);
171 elseif hosts[host] and hosts[host].type == "local" and stanza.name == "iq" and not resource then -- directed at bare JID
172 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
174 core_route_stanza(origin, stanza);
178 function core_route_stanza(origin, stanza)
183 local to = stanza.attr.to;
184 local node, host, resource = jid_split(to);
185 local to_bare = node and (node.."@"..host) or host; -- bare JID
186 local from = stanza.attr.from;
187 local from_node, from_host, from_resource = jid_split(from);
188 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
190 -- Auto-detect origin if not specified
191 origin = origin or hosts[from_host];
192 if not origin then return false; end
194 if hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
195 return component_handle_stanza(origin, stanza);
196 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
197 return component_handle_stanza(origin, stanza);
200 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error") then resource = nil; end
202 local host_session = hosts[host]
203 if host_session and host_session.type == "local" then
205 local user = host_session.sessions[node];
207 local res = user.sessions[resource];
208 if res then -- resource is online...
209 res.send(stanza); -- Yay \o/
211 -- if we get here, resource was not specified or was unavailable
212 if stanza.name == "presence" then
213 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
214 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
215 elseif not resource then -- sender is available or unavailable or error
216 for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
217 if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
218 stanza.attr.to = session.full_jid; -- reset at the end of function
219 session.send(stanza);
223 elseif stanza.name == "message" then -- select a resource to recieve message
224 stanza.attr.to = to_bare;
225 if stanza.attr.type == 'headline' then
226 for _, session in pairs(user.sessions) do -- find resource with greatest priority
227 if session.presence and session.priority >= 0 then
228 session.send(stanza);
231 elseif resource and stanza.attr.type == 'groupchat' then
232 -- Groupchat message sent to offline resource
233 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
236 for _, session in ipairs(select_best_resources(user)) do
237 session.send(stanza);
240 if count == 0 and (stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type) then
241 offlinemanager.store(node, host, stanza);
242 -- TODO deal with storage errors
245 elseif stanza.attr.type == "get" or stanza.attr.type == "set" then
246 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
251 if user_exists(node, host) then
252 if stanza.name == "presence" then
253 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
254 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
256 -- TODO send unavailable presence or unsubscribed
258 elseif stanza.name == "message" then -- FIXME if full jid, then send out to resources with highest priority
259 stanza.attr.to = to_bare; -- TODO not in RFC, but seems obvious. Should discuss on the mailing list.
260 if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
261 offlinemanager.store(node, host, stanza);
262 -- FIXME don't store messages with only chat state notifications
263 elseif stanza.attr.type == "groupchat" then
264 local reply = st.error_reply(stanza, "cancel", "service-unavailable");
265 reply.attr.from = to;
268 -- TODO allow configuration of offline storage
269 -- TODO send error if not storing offline
270 elseif stanza.name == "iq" and (stanza.attr.type == "get" or stanza.attr.type == "set") then
271 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
273 else -- user does not exist
274 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
275 if stanza.name == "presence" then
276 local t = stanza.attr.type;
277 if t == "subscribe" or t == "probe" then
278 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
281 elseif stanza.attr.type ~= "error" and (stanza.name ~= "iq" or stanza.attr.type ~= "result") then
282 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
286 elseif origin.type == "c2s" then
288 local xmlns = stanza.attr.xmlns;
289 --stanza.attr.xmlns = "jabber:server";
290 stanza.attr.xmlns = nil;
291 log("debug", "sending s2s stanza: %s", tostring(stanza));
292 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
293 stanza.attr.xmlns = xmlns; -- reset
294 elseif origin.type == "component" or origin.type == "local" then
295 -- Route via s2s for components and modules
296 log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
297 send_s2s(origin.host, host, stanza);
299 log("warn", "received stanza from unhandled connection type: %s", origin.type);
301 stanza.attr.to = to; -- reset
304 function select_best_resources(user)
306 local recipients = {};
307 for _, session in pairs(user.sessions) do -- find resource with greatest priority
308 if session.presence then
309 local p = session.priority;
312 recipients = {session};
313 elseif p == priority then
314 t_insert(recipients, session);