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 st = require "util.stanza";
14 local send_s2s = require "core.s2smanager".send_to_host;
15 local user_exists = require "core.usermanager".user_exists;
17 local rostermanager = require "core.rostermanager";
18 local sessionmanager = require "core.sessionmanager";
19 local offlinemanager = require "core.offlinemanager";
21 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
22 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
24 local modules_handle_stanza = require "core.modulemanager".handle_stanza;
25 local component_handle_stanza = require "core.componentmanager".handle_stanza;
27 local handle_outbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
28 local handle_inbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
29 local handle_normal_presence = require "core.presencemanager".handle_normal_presence;
31 local format = string.format;
32 local tostring = tostring;
33 local t_concat = table.concat;
34 local t_insert = table.insert;
35 local tonumber = tonumber;
36 local s_find = string.find;
38 local ipairs = ipairs;
40 local jid_split = require "util.jid".split;
41 local jid_prepped_split = require "util.jid".prepped_split;
43 local function checked_error_reply(origin, stanza)
44 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
45 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
49 function core_process_stanza(origin, stanza)
50 (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
52 if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
53 -- TODO verify validity of stanza (as well as JID validity)
54 if stanza.attr.xmlns == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
55 if stanza.name == "iq" then
56 if (stanza.attr.type == "set" or stanza.attr.type == "get") and #stanza.tags ~= 1 then
57 origin.send(st.error_reply(stanza, "modify", "bad-request"));
62 if origin.type == "c2s" and not origin.full_jid
63 and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
64 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
65 error("Client MUST bind resource after auth");
68 -- TODO also, stanzas should be returned to their original state before the function ends
69 if origin.type == "c2s" then
70 stanza.attr.from = origin.full_jid;
72 local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
73 local from = stanza.attr.from;
74 local node, host, resource;
75 local from_node, from_host, from_resource;
76 local to_bare, from_bare;
78 node, host, resource = jid_prepped_split(to);
80 error("Invalid to JID");
82 to_bare = node and (node.."@"..host) or host; -- bare JID
83 if resource then to = to_bare.."/"..resource; else to = to_bare; end
87 from_node, from_host, from_resource = jid_prepped_split(from);
89 error("Invalid from JID");
91 from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
92 if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
93 stanza.attr.from = from;
96 --[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
97 log("warn", "stanza recieved for a non-local server");
98 return; -- FIXME what should we do here?
101 -- FIXME do stanzas not of jabber:client get handled by components?
102 if (origin.type == "s2sin" or origin.type == "c2s" or origin.type == "component") and (not xmlns or xmlns == "jabber:server" or xmlns == "jabber:client") then
103 if origin.type == "s2sin" and not origin.dummy then
104 local host_status = origin.hosts[from_host];
105 if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
106 log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from_host, origin.from_host);
107 return; -- FIXME what should we do here? does this work with subdomains?
110 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
111 origin.directed = origin.directed or {};
112 origin.directed[to] = true;
113 --t_insert(origin.directed, to); -- FIXME does it make more sense to add to_bare rather than to?
116 core_handle_stanza(origin, stanza);
117 elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
118 core_handle_stanza(origin, stanza);
119 elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
120 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
121 elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
122 component_handle_stanza(origin, stanza);
123 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
124 component_handle_stanza(origin, stanza);
125 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
126 component_handle_stanza(origin, stanza);
127 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
128 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
129 elseif hosts[host] and hosts[host].type == "local" and stanza.name == "iq" and not resource then -- directed at bare JID
130 core_handle_stanza(origin, stanza);
132 core_route_stanza(origin, stanza);
135 core_handle_stanza(origin, stanza);
139 -- This function handles stanzas which are not routed any further,
140 -- that is, they are handled by this server
141 function core_handle_stanza(origin, stanza)
143 if modules_handle_stanza(select(2, jid_split(stanza.attr.to)) or origin.host, origin, stanza) then return; end
144 if origin.type == "c2s" or origin.type == "s2sin" then
145 if origin.type == "c2s" then
146 if stanza.name == "presence" and origin.roster then
147 if stanza.attr.type == nil or stanza.attr.type == "unavailable" and stanza.attr.type ~= "error" then
148 handle_normal_presence(origin, stanza, core_route_stanza);
150 log("warn", "Unhandled c2s presence: %s", tostring(stanza));
151 checked_error_reply(origin, stanza);
154 log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
155 checked_error_reply(origin, stanza);
158 log("warn", "Unhandled s2s stanza: %s", tostring(stanza));
159 checked_error_reply(origin, stanza);
162 log("warn", "Unhandled %s stanza: %s", origin.type, tostring(stanza));
163 checked_error_reply(origin, stanza);
167 function core_route_stanza(origin, stanza)
172 local to = stanza.attr.to;
173 local node, host, resource = jid_split(to);
174 local to_bare = node and (node.."@"..host) or host; -- bare JID
175 local from = stanza.attr.from;
176 local from_node, from_host, from_resource = jid_split(from);
177 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
179 -- Auto-detect origin if not specified
180 origin = origin or hosts[from_host];
181 if not origin then return false; end
183 if hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
184 return component_handle_stanza(origin, stanza);
185 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
186 return component_handle_stanza(origin, stanza);
187 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
188 return component_handle_stanza(origin, stanza);
191 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error") then resource = nil; end
193 local host_session = hosts[host]
194 if host_session and host_session.type == "local" then
196 local user = host_session.sessions[node];
198 local res = user.sessions[resource];
200 -- if we get here, resource was not specified or was unavailable
201 if stanza.name == "presence" then
202 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
203 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
204 elseif not resource then -- sender is available or unavailable or error
205 for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
206 if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
207 stanza.attr.to = session.full_jid; -- reset at the end of function
208 session.send(stanza);
212 elseif stanza.name == "message" then -- select a resource to recieve message
213 stanza.attr.to = to_bare;
214 if stanza.attr.type == 'headline' then
215 for _, session in pairs(user.sessions) do -- find resource with greatest priority
216 if session.presence and session.priority >= 0 then
217 session.send(stanza);
220 elseif resource and stanza.attr.type == 'groupchat' then
221 -- Groupchat message sent to offline resource
222 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
225 local recipients = {};
226 for _, session in pairs(user.sessions) do -- find resource with greatest priority
227 if session.presence then
228 local p = session.priority;
231 recipients = {session};
232 elseif p == priority then
233 t_insert(recipients, session);
238 for _, session in ipairs(recipients) do
239 session.send(stanza);
242 if count == 0 and (stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type) then
243 offlinemanager.store(node, host, stanza);
244 -- TODO deal with storage errors
247 elseif stanza.attr.type == "get" or stanza.attr.type == "set" then
248 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
251 -- User + resource is online...
252 stanza.attr.to = res.full_jid; -- reset at the end of function
253 res.send(stanza); -- Yay \o/
257 if user_exists(node, host) then
258 if stanza.name == "presence" then
259 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
260 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
262 -- TODO send unavailable presence or unsubscribed
264 elseif stanza.name == "message" then -- FIXME if full jid, then send out to resources with highest priority
265 stanza.attr.to = to_bare; -- TODO not in RFC, but seems obvious. Should discuss on the mailing list.
266 if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
267 offlinemanager.store(node, host, stanza);
268 -- FIXME don't store messages with only chat state notifications
269 elseif stanza.attr.type == "groupchat" then
270 local reply = st.error_reply(stanza, "cancel", "service-unavailable");
271 reply.attr.from = to;
274 -- TODO allow configuration of offline storage
275 -- TODO send error if not storing offline
276 elseif stanza.name == "iq" and (stanza.attr.type == "get" or stanza.attr.type == "set") then
277 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
279 else -- user does not exist
280 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
281 if stanza.name == "presence" then
282 local t = stanza.attr.type;
283 if t == "subscribe" or t == "probe" then
284 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
287 elseif stanza.attr.type ~= "error" and (stanza.name ~= "iq" or stanza.attr.type ~= "result") then
288 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
292 elseif origin.type == "c2s" then
294 local xmlns = stanza.attr.xmlns;
295 --stanza.attr.xmlns = "jabber:server";
296 stanza.attr.xmlns = nil;
297 log("debug", "sending s2s stanza: %s", tostring(stanza));
298 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
299 stanza.attr.xmlns = xmlns; -- reset
300 elseif origin.type == "component" or origin.type == "local" then
301 -- Route via s2s for components and modules
302 log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
303 send_s2s(origin.host, host, stanza);
305 log("warn", "received stanza from unhandled connection type: %s", origin.type);
307 stanza.attr.to = to; -- reset