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;
46 local function checked_error_reply(origin, stanza)
47 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
48 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
52 function core_process_stanza(origin, stanza)
53 (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
55 if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
56 -- TODO verify validity of stanza (as well as JID validity)
57 if stanza.attr.xmlns == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
58 if stanza.name == "iq" then
59 if (stanza.attr.type == "set" or stanza.attr.type == "get") and #stanza.tags ~= 1 then
60 origin.send(st.error_reply(stanza, "modify", "bad-request"));
65 if origin.type == "c2s" and not origin.full_jid
66 and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
67 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
68 error("Client MUST bind resource after auth");
71 -- TODO also, stanzas should be returned to their original state before the function ends
72 if origin.type == "c2s" then
73 stanza.attr.from = origin.full_jid;
75 local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
76 local from = stanza.attr.from;
77 local node, host, resource;
78 local from_node, from_host, from_resource;
79 local to_bare, from_bare;
81 node, host, resource = jid_prepped_split(to);
83 log("warn", "Received stanza with invalid destination JID: %s", to);
84 origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The destination address is invalid: "..to));
87 to_bare = node and (node.."@"..host) or host; -- bare JID
88 if resource then to = to_bare.."/"..resource; else to = to_bare; end
92 -- We only stamp the 'from' on c2s stanzas, so we still need to check validity
93 from_node, from_host, from_resource = jid_prepped_split(from);
95 log("warn", "Received stanza with invalid source JID: %s", from);
96 origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The source address is invalid: "..from));
99 from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
100 if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
101 stanza.attr.from = from;
104 --[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
105 log("warn", "stanza recieved for a non-local server");
106 return; -- FIXME what should we do here?
109 -- FIXME do stanzas not of jabber:client get handled by components?
110 if (origin.type == "s2sin" or origin.type == "c2s" or origin.type == "component") and (not xmlns or xmlns == "jabber:server" or xmlns == "jabber:client") then
111 local event_data = {origin=origin, stanza=stanza};
112 if fire_event(tostring(host or origin.host).."/"..stanza.name, event_data) then return; end
113 if origin.type == "s2sin" and not origin.dummy then
114 local host_status = origin.hosts[from_host];
115 if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
116 log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from_host, origin.from_host);
117 return; -- FIXME what should we do here? does this work with subdomains?
120 if origin.type == "c2s" and stanza.name == "presence" and to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then -- directed presence
121 origin.directed = origin.directed or {};
122 origin.directed[to] = true;
123 --t_insert(origin.directed, to); -- FIXME does it make more sense to add to_bare rather than to?
126 core_handle_stanza(origin, stanza);
127 elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
128 core_handle_stanza(origin, stanza);
129 elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
130 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
131 elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
132 component_handle_stanza(origin, stanza);
133 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
134 component_handle_stanza(origin, stanza);
135 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
136 component_handle_stanza(origin, stanza);
137 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
138 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
139 elseif hosts[host] and hosts[host].type == "local" and stanza.name == "iq" and not resource then -- directed at bare JID
140 core_handle_stanza(origin, stanza);
142 core_route_stanza(origin, stanza);
145 core_handle_stanza(origin, stanza);
149 -- This function handles stanzas which are not routed any further,
150 -- that is, they are handled by this server
151 function core_handle_stanza(origin, stanza)
153 if modules_handle_stanza(select(2, jid_split(stanza.attr.to)) or origin.host or origin.to_host, origin, stanza) then return; end
154 if origin.type == "c2s" or origin.type == "s2sin" then
155 if origin.type == "c2s" then
156 if stanza.name == "presence" and origin.roster then
157 if stanza.attr.type == nil or stanza.attr.type == "unavailable" and stanza.attr.type ~= "error" then
158 handle_normal_presence(origin, stanza, core_route_stanza);
160 log("warn", "Unhandled c2s presence: %s", tostring(stanza));
161 checked_error_reply(origin, stanza);
164 log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
165 checked_error_reply(origin, stanza);
168 log("warn", "Unhandled s2s stanza: %s", tostring(stanza));
169 checked_error_reply(origin, stanza);
172 log("warn", "Unhandled %s stanza: %s", origin.type, tostring(stanza));
173 checked_error_reply(origin, stanza);
177 function core_route_stanza(origin, stanza)
182 local to = stanza.attr.to;
183 local node, host, resource = jid_split(to);
184 local to_bare = node and (node.."@"..host) or host; -- bare JID
185 local from = stanza.attr.from;
186 local from_node, from_host, from_resource = jid_split(from);
187 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
189 -- Auto-detect origin if not specified
190 origin = origin or hosts[from_host];
191 if not origin then return false; end
193 if hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
194 return component_handle_stanza(origin, stanza);
195 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
196 return component_handle_stanza(origin, stanza);
197 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
198 return component_handle_stanza(origin, stanza);
201 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error") then resource = nil; end
203 local host_session = hosts[host]
204 if host_session and host_session.type == "local" then
206 local user = host_session.sessions[node];
208 local res = user.sessions[resource];
210 -- if we get here, resource was not specified or was unavailable
211 if stanza.name == "presence" then
212 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
213 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
214 elseif not resource then -- sender is available or unavailable or error
215 for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
216 if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
217 stanza.attr.to = session.full_jid; -- reset at the end of function
218 session.send(stanza);
222 elseif stanza.name == "message" then -- select a resource to recieve message
223 stanza.attr.to = to_bare;
224 if stanza.attr.type == 'headline' then
225 for _, session in pairs(user.sessions) do -- find resource with greatest priority
226 if session.presence and session.priority >= 0 then
227 session.send(stanza);
230 elseif resource and stanza.attr.type == 'groupchat' then
231 -- Groupchat message sent to offline resource
232 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
235 local recipients = {};
236 for _, session in pairs(user.sessions) do -- find resource with greatest priority
237 if session.presence then
238 local p = session.priority;
241 recipients = {session};
242 elseif p == priority then
243 t_insert(recipients, session);
248 for _, session in ipairs(recipients) do
249 session.send(stanza);
252 if count == 0 and (stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type) then
253 offlinemanager.store(node, host, stanza);
254 -- TODO deal with storage errors
257 elseif stanza.attr.type == "get" or stanza.attr.type == "set" then
258 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
261 -- User + resource is online...
262 stanza.attr.to = res.full_jid; -- reset at the end of function
263 res.send(stanza); -- Yay \o/
267 if user_exists(node, host) then
268 if stanza.name == "presence" then
269 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
270 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
272 -- TODO send unavailable presence or unsubscribed
274 elseif stanza.name == "message" then -- FIXME if full jid, then send out to resources with highest priority
275 stanza.attr.to = to_bare; -- TODO not in RFC, but seems obvious. Should discuss on the mailing list.
276 if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
277 offlinemanager.store(node, host, stanza);
278 -- FIXME don't store messages with only chat state notifications
279 elseif stanza.attr.type == "groupchat" then
280 local reply = st.error_reply(stanza, "cancel", "service-unavailable");
281 reply.attr.from = to;
284 -- TODO allow configuration of offline storage
285 -- TODO send error if not storing offline
286 elseif stanza.name == "iq" and (stanza.attr.type == "get" or stanza.attr.type == "set") then
287 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
289 else -- user does not exist
290 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
291 if stanza.name == "presence" then
292 local t = stanza.attr.type;
293 if t == "subscribe" or t == "probe" then
294 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
297 elseif stanza.attr.type ~= "error" and (stanza.name ~= "iq" or stanza.attr.type ~= "result") then
298 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
302 elseif origin.type == "c2s" then
304 local xmlns = stanza.attr.xmlns;
305 --stanza.attr.xmlns = "jabber:server";
306 stanza.attr.xmlns = nil;
307 log("debug", "sending s2s stanza: %s", tostring(stanza));
308 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
309 stanza.attr.xmlns = xmlns; -- reset
310 elseif origin.type == "component" or origin.type == "local" then
311 -- Route via s2s for components and modules
312 log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
313 send_s2s(origin.host, host, stanza);
315 log("warn", "received stanza from unhandled connection type: %s", origin.type);
317 stanza.attr.to = to; -- reset