prosody
bcf539295f2d
core/stanza_router.lua

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core/stanza_router.lua @ 30:bcf539295f2d

Huge commit to: * Break stanza routing (to be restored in a future commit) * Remove the old stanza_dispatcher code, which was never going to be maintainable nor extendable :) * Bring us plugins, starting with mod_legacyauth and mod_roster * Sessions are now created/destroyed using a standard sessionmanager interface
author Matthew Wild <mwild1@gmail.com>
date Tue, 30 Sep 2008 19:52:00 +0100
child 31:aaccbf07849b
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29:b847875801e5 30:bcf539295f2d
1
2 -- The code in this file should be self-explanatory, though the logic is horrible
3 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense
4 -- the rules from the RFCs (mainly 3921)
5
6 require "core.servermanager"
7
8 local log = require "util.logger".init("stanzarouter")
9
10 require "util.jid"
11 local jid_split = jid.split;
12
13 function core_process_stanza(origin, stanza)
14 local to = stanza.attr.to;
15
16 if not to or (hosts[to] and hosts[to].type == "local") then
17 core_handle_stanza(origin, stanza);
18 elseif origin.type == "c2s" then
19 core_route_stanza(origin, stanza);
20 end
21
22 end
23
24 function core_handle_stanza(origin, stanza)
25 -- Handlers
26 if origin.type == "c2s" or origin.type == "c2s_unauthed" then
27 local session = origin;
28 stanza.attr.from = session.full_jid;
29
30 log("debug", "Routing stanza");
31 -- Stanza has no to attribute
32 --local to_node, to_host, to_resource = jid_split(stanza.attr.to);
33 --if not to_host then error("Invalid destination JID: "..string.format("{ %q, %q, %q } == %q", to_node or "", to_host or "", to_resource or "", stanza.attr.to or "nil")); end
34
35 -- Stanza is to this server, or a user on this server
36 log("debug", "Routing stanza to local");
37 print(type(origin), type(stanza));
38 handle_stanza(session, stanza);
39 end
40 end
41
42 function core_route_stanza(origin, stanza)
43 -- Hooks
44 -- Deliver
45 end
46
47 function handle_stanza_nodest(stanza)
48 if stanza.name == "iq" then
49 handle_stanza_iq_no_to(session, stanza);
50 elseif stanza.name == "presence" then
51 -- Broadcast to this user's contacts
52 handle_stanza_presence_broadcast(session, stanza);
53 -- also, if it is initial presence, send out presence probes
54 if not session.last_presence then
55 handle_stanza_presence_probe_broadcast(session, stanza);
56 end
57 session.last_presence = stanza;
58 elseif stanza.name == "message" then
59 -- Treat as if message was sent to bare JID of the sender
60 handle_stanza_to_local_user(stanza);
61 end
62 end
63
64 function handle_stanza_tolocal(stanza)
65 local node, host, resource = jid.split(stanza.attr.to);
66 if host and hosts[host] and hosts[host].type == "local" then
67 -- Is a local host, handle internally
68 if node then
69 -- Is a local user, send to their session
70 log("debug", "Routing stanza to %s@%s", node, host);
71 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
72 handle_stanza_to_local_user(stanza);
73 else
74 -- Is sent to this server, let's handle it...
75 log("debug", "Routing stanza to %s", host);
76 handle_stanza_to_server(stanza, session);
77 end
78 end
79 end
80
81 function handle_stanza_toremote(stanza)
82 log("error", "Stanza bound for remote host, but s2s is not implemented");
83 end
84
85
86 --[[
87 local function route_c2s_stanza(session, stanza)
88 stanza.attr.from = session.full_jid;
89 if not stanza.attr.to and session.username then
90 -- Has no 'to' attribute, handle internally
91 if stanza.name == "iq" then
92 handle_stanza_iq_no_to(session, stanza);
93 elseif stanza.name == "presence" then
94 -- Broadcast to this user's contacts
95 handle_stanza_presence_broadcast(session, stanza);
96 -- also, if it is initial presence, send out presence probes
97 if not session.last_presence then
98 handle_stanza_presence_probe_broadcast(session, stanza);
99 end
100 session.last_presence = stanza;
101 elseif stanza.name == "message" then
102 -- Treat as if message was sent to bare JID of the sender
103 handle_stanza_to_local_user(stanza);
104 end
105 end
106 local node, host, resource = jid.split(stanza.attr.to);
107 if host and hosts[host] and hosts[host].type == "local" then
108 -- Is a local host, handle internally
109 if node then
110 -- Is a local user, send to their session
111 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
112 handle_stanza_to_local_user(stanza);
113 else
114 -- Is sent to this server, let's handle it...
115 handle_stanza_to_server(stanza, session);
116 end
117 else
118 -- Is not for us or a local user, route accordingly
119 route_s2s_stanza(stanza);
120 end
121 end
122
123 function handle_stanza_no_to(session, stanza)
124 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end
125 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns);
126 if stanza.attr.type == "get" or stanza.attr.type == "set" then
127 if iq_handlers[xmlns] then
128 if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it
129 end
130 -- Oh, handler didn't handle it. Need to send service-unavailable now.
131 log("warn", "Unhandled namespace: "..xmlns);
132 session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id));
133 return; -- All done!
134 end
135 end
136
137 function handle_stanza_to_local_user(stanza)
138 if stanza.name == "message" then
139 handle_stanza_message_to_local_user(stanza);
140 elseif stanza.name == "presence" then
141 handle_stanza_presence_to_local_user(stanza);
142 elseif stanza.name == "iq" then
143 handle_stanza_iq_to_local_user(stanza);
144 end
145 end
146
147 function handle_stanza_message_to_local_user(stanza)
148 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
149 local destuser = hosts[host].sessions[node];
150 if destuser then
151 if resource and destuser[resource] then
152 destuser[resource]:send(stanza);
153 else
154 -- Bare JID, or resource offline
155 local best_session;
156 for resource, session in pairs(destuser.sessions) do
157 if not best_session then best_session = session;
158 elseif session.priority >= best_session.priority and session.priority >= 0 then
159 best_session = session;
160 end
161 end
162 if not best_session then
163 offlinemessage.new(node, host, stanza);
164 else
165 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
166 destuser[best_session]:send(stanza);
167 end
168 end
169 else
170 -- User is offline
171 offlinemessage.new(node, host, stanza);
172 end
173 end
174
175 function handle_stanza_presence_to_local_user(stanza)
176 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
177 local destuser = hosts[host].sessions[node];
178 if destuser then
179 if resource then
180 if destuser[resource] then
181 destuser[resource]:send(stanza);
182 else
183 return;
184 end
185 else
186 -- Broadcast to all user's resources
187 for resource, session in pairs(destuser.sessions) do
188 session:send(stanza);
189 end
190 end
191 end
192 end
193
194 function handle_stanza_iq_to_local_user(stanza)
195
196 end
197
198 function foo()
199 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
200 local destuser = hosts[host].sessions[node];
201 if destuser and destuser.sessions then
202 -- User online
203 if resource and destuser.sessions[resource] then
204 stanza.to:send(stanza);
205 else
206 --User is online, but specified resource isn't (or no resource specified)
207 local best_session;
208 for resource, session in pairs(destuser.sessions) do
209 if not best_session then best_session = session;
210 elseif session.priority >= best_session.priority and session.priority >= 0 then
211 best_session = session;
212 end
213 end
214 if not best_session then
215 offlinemessage.new(node, host, stanza);
216 else
217 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
218 resource = best_session.resource;
219 end
220 end
221 if destuser.sessions[resource] == session then
222 log("warn", "core", "Attempt to send stanza to self, dropping...");
223 else
224 print("...sending...", tostring(stanza));
225 --destuser.sessions[resource].conn.write(tostring(data));
226 print(" to conn ", destuser.sessions[resource].conn);
227 destuser.sessions[resource].conn.write(tostring(stanza));
228 print("...sent")
229 end
230 elseif stanza.name == "message" then
231 print(" ...will be stored offline");
232 offlinemessage.new(node, host, stanza);
233 elseif stanza.name == "iq" then
234 print(" ...is an iq");
235 stanza.from:send(st.reply(stanza)
236 :tag("error", { type = "cancel" })
237 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
238 end
239 end
240
241 -- Broadcast a presence stanza to all of a user's contacts
242 function handle_stanza_presence_broadcast(session, stanza)
243 if session.roster then
244 local initial_presence = not session.last_presence;
245 session.last_presence = stanza;
246
247 -- Broadcast presence and probes
248 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type });
249
250 for child in stanza:childtags() do
251 broadcast:add_child(child);
252 end
253 for contact_jid in pairs(session.roster) do
254 broadcast.attr.to = contact_jid;
255 send_to(contact_jid, broadcast);
256 if initial_presence then
257 local node, host = jid.split(contact_jid);
258 if hosts[host] and hosts[host].type == "local" then
259 local contact = hosts[host].sessions[node]
260 if contact then
261 local pres = st.presence { to = session.full_jid };
262 for resource, contact_session in pairs(contact.sessions) do
263 if contact_session.last_presence then
264 pres.tags = contact_session.last_presence.tags;
265 pres.attr.from = contact_session.full_jid;
266 send(pres);
267 end
268 end
269 end
270 --FIXME: Do we send unavailable if they are offline?
271 else
272 probe.attr.to = contact;
273 send_to(contact, probe);
274 end
275 end
276 end
277
278 -- Probe for our contacts' presence
279 end
280 end
281
282 -- Broadcast presence probes to all of a user's contacts
283 function handle_stanza_presence_probe_broadcast(session, stanza)
284 end
285
286 --
287 function handle_stanza_to_server(stanza)
288 end
289
290 function handle_stanza_iq_no_to(session, stanza)
291 end
292 ]]