Sun, 05 Oct 2008 19:48:25 +0100
Beginnings of real stanza routing
30 | 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) | |
66 | 14 | log("debug", "Received: "..tostring(stanza)) |
30 | 15 | local to = stanza.attr.to; |
16 | ||
17 | if not to or (hosts[to] and hosts[to].type == "local") then | |
18 | core_handle_stanza(origin, stanza); | |
19 | elseif origin.type == "c2s" then | |
20 | core_route_stanza(origin, stanza); | |
21 | end | |
22 | ||
23 | end | |
24 | ||
25 | function core_handle_stanza(origin, stanza) | |
26 | -- Handlers | |
27 | if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
28 | local session = origin; | |
29 | stanza.attr.from = session.full_jid; | |
30 | ||
31 | log("debug", "Routing stanza"); | |
32 | -- Stanza has no to attribute | |
33 | --local to_node, to_host, to_resource = jid_split(stanza.attr.to); | |
34 | --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 | |
35 | ||
36 | -- Stanza is to this server, or a user on this server | |
37 | log("debug", "Routing stanza to local"); | |
38 | handle_stanza(session, stanza); | |
39 | end | |
40 | end | |
41 | ||
42 | function core_route_stanza(origin, stanza) | |
43 | -- Hooks | |
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Beginnings of real stanza routing
Matthew Wild <mwild1@gmail.com>
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44 | --- ...later |
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45 | |
30 | 46 | -- Deliver |
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47 | local node, host, resource = jid_split(stanza.attr.to); |
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48 | local host_session = hosts[host] |
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49 | if host_session and host_session.type == "local" then |
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50 | -- Local host |
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51 | else |
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52 | -- Remote host |
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53 | if host_session then |
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54 | -- Send to session |
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55 | else |
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56 | -- Need to establish the connection |
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57 | end |
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58 | end |
30 | 59 | end |
60 | ||
61 | function handle_stanza_nodest(stanza) | |
62 | if stanza.name == "iq" then | |
63 | handle_stanza_iq_no_to(session, stanza); | |
64 | elseif stanza.name == "presence" then | |
65 | -- Broadcast to this user's contacts | |
66 | handle_stanza_presence_broadcast(session, stanza); | |
67 | -- also, if it is initial presence, send out presence probes | |
68 | if not session.last_presence then | |
69 | handle_stanza_presence_probe_broadcast(session, stanza); | |
70 | end | |
71 | session.last_presence = stanza; | |
72 | elseif stanza.name == "message" then | |
73 | -- Treat as if message was sent to bare JID of the sender | |
74 | handle_stanza_to_local_user(stanza); | |
75 | end | |
76 | end | |
77 | ||
78 | function handle_stanza_tolocal(stanza) | |
79 | local node, host, resource = jid.split(stanza.attr.to); | |
80 | if host and hosts[host] and hosts[host].type == "local" then | |
81 | -- Is a local host, handle internally | |
82 | if node then | |
83 | -- Is a local user, send to their session | |
84 | log("debug", "Routing stanza to %s@%s", node, host); | |
85 | if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
86 | handle_stanza_to_local_user(stanza); | |
87 | else | |
88 | -- Is sent to this server, let's handle it... | |
89 | log("debug", "Routing stanza to %s", host); | |
90 | handle_stanza_to_server(stanza, session); | |
91 | end | |
92 | end | |
93 | end | |
94 | ||
95 | function handle_stanza_toremote(stanza) | |
96 | log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
97 | end | |
98 | ||
99 | ||
100 | --[[ | |
101 | local function route_c2s_stanza(session, stanza) | |
102 | stanza.attr.from = session.full_jid; | |
103 | if not stanza.attr.to and session.username then | |
104 | -- Has no 'to' attribute, handle internally | |
105 | if stanza.name == "iq" then | |
106 | handle_stanza_iq_no_to(session, stanza); | |
107 | elseif stanza.name == "presence" then | |
108 | -- Broadcast to this user's contacts | |
109 | handle_stanza_presence_broadcast(session, stanza); | |
110 | -- also, if it is initial presence, send out presence probes | |
111 | if not session.last_presence then | |
112 | handle_stanza_presence_probe_broadcast(session, stanza); | |
113 | end | |
114 | session.last_presence = stanza; | |
115 | elseif stanza.name == "message" then | |
116 | -- Treat as if message was sent to bare JID of the sender | |
117 | handle_stanza_to_local_user(stanza); | |
118 | end | |
119 | end | |
120 | local node, host, resource = jid.split(stanza.attr.to); | |
121 | if host and hosts[host] and hosts[host].type == "local" then | |
122 | -- Is a local host, handle internally | |
123 | if node then | |
124 | -- Is a local user, send to their session | |
125 | if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
126 | handle_stanza_to_local_user(stanza); | |
127 | else | |
128 | -- Is sent to this server, let's handle it... | |
129 | handle_stanza_to_server(stanza, session); | |
130 | end | |
131 | else | |
132 | -- Is not for us or a local user, route accordingly | |
133 | route_s2s_stanza(stanza); | |
134 | end | |
135 | end | |
136 | ||
137 | function handle_stanza_no_to(session, stanza) | |
138 | if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
139 | local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
140 | if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
141 | if iq_handlers[xmlns] then | |
142 | if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
143 | end | |
144 | -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
145 | log("warn", "Unhandled namespace: "..xmlns); | |
146 | session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
147 | return; -- All done! | |
148 | end | |
149 | end | |
150 | ||
151 | function handle_stanza_to_local_user(stanza) | |
152 | if stanza.name == "message" then | |
153 | handle_stanza_message_to_local_user(stanza); | |
154 | elseif stanza.name == "presence" then | |
155 | handle_stanza_presence_to_local_user(stanza); | |
156 | elseif stanza.name == "iq" then | |
157 | handle_stanza_iq_to_local_user(stanza); | |
158 | end | |
159 | end | |
160 | ||
161 | function handle_stanza_message_to_local_user(stanza) | |
162 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
163 | local destuser = hosts[host].sessions[node]; | |
164 | if destuser then | |
165 | if resource and destuser[resource] then | |
166 | destuser[resource]:send(stanza); | |
167 | else | |
168 | -- Bare JID, or resource offline | |
169 | local best_session; | |
170 | for resource, session in pairs(destuser.sessions) do | |
171 | if not best_session then best_session = session; | |
172 | elseif session.priority >= best_session.priority and session.priority >= 0 then | |
173 | best_session = session; | |
174 | end | |
175 | end | |
176 | if not best_session then | |
177 | offlinemessage.new(node, host, stanza); | |
178 | else | |
179 | print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
180 | destuser[best_session]:send(stanza); | |
181 | end | |
182 | end | |
183 | else | |
184 | -- User is offline | |
185 | offlinemessage.new(node, host, stanza); | |
186 | end | |
187 | end | |
188 | ||
189 | function handle_stanza_presence_to_local_user(stanza) | |
190 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
191 | local destuser = hosts[host].sessions[node]; | |
192 | if destuser then | |
193 | if resource then | |
194 | if destuser[resource] then | |
195 | destuser[resource]:send(stanza); | |
196 | else | |
197 | return; | |
198 | end | |
199 | else | |
200 | -- Broadcast to all user's resources | |
201 | for resource, session in pairs(destuser.sessions) do | |
202 | session:send(stanza); | |
203 | end | |
204 | end | |
205 | end | |
206 | end | |
207 | ||
208 | function handle_stanza_iq_to_local_user(stanza) | |
209 | ||
210 | end | |
211 | ||
212 | function foo() | |
213 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
214 | local destuser = hosts[host].sessions[node]; | |
215 | if destuser and destuser.sessions then | |
216 | -- User online | |
217 | if resource and destuser.sessions[resource] then | |
218 | stanza.to:send(stanza); | |
219 | else | |
220 | --User is online, but specified resource isn't (or no resource specified) | |
221 | local best_session; | |
222 | for resource, session in pairs(destuser.sessions) do | |
223 | if not best_session then best_session = session; | |
224 | elseif session.priority >= best_session.priority and session.priority >= 0 then | |
225 | best_session = session; | |
226 | end | |
227 | end | |
228 | if not best_session then | |
229 | offlinemessage.new(node, host, stanza); | |
230 | else | |
231 | print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
232 | resource = best_session.resource; | |
233 | end | |
234 | end | |
235 | if destuser.sessions[resource] == session then | |
236 | log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
237 | else | |
238 | print("...sending...", tostring(stanza)); | |
239 | --destuser.sessions[resource].conn.write(tostring(data)); | |
240 | print(" to conn ", destuser.sessions[resource].conn); | |
241 | destuser.sessions[resource].conn.write(tostring(stanza)); | |
242 | print("...sent") | |
243 | end | |
244 | elseif stanza.name == "message" then | |
245 | print(" ...will be stored offline"); | |
246 | offlinemessage.new(node, host, stanza); | |
247 | elseif stanza.name == "iq" then | |
248 | print(" ...is an iq"); | |
249 | stanza.from:send(st.reply(stanza) | |
250 | :tag("error", { type = "cancel" }) | |
251 | :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
252 | end | |
253 | end | |
254 | ||
255 | -- Broadcast a presence stanza to all of a user's contacts | |
256 | function handle_stanza_presence_broadcast(session, stanza) | |
257 | if session.roster then | |
258 | local initial_presence = not session.last_presence; | |
259 | session.last_presence = stanza; | |
260 | ||
261 | -- Broadcast presence and probes | |
262 | local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
263 | ||
264 | for child in stanza:childtags() do | |
265 | broadcast:add_child(child); | |
266 | end | |
267 | for contact_jid in pairs(session.roster) do | |
268 | broadcast.attr.to = contact_jid; | |
269 | send_to(contact_jid, broadcast); | |
270 | if initial_presence then | |
271 | local node, host = jid.split(contact_jid); | |
272 | if hosts[host] and hosts[host].type == "local" then | |
273 | local contact = hosts[host].sessions[node] | |
274 | if contact then | |
275 | local pres = st.presence { to = session.full_jid }; | |
276 | for resource, contact_session in pairs(contact.sessions) do | |
277 | if contact_session.last_presence then | |
278 | pres.tags = contact_session.last_presence.tags; | |
279 | pres.attr.from = contact_session.full_jid; | |
280 | send(pres); | |
281 | end | |
282 | end | |
283 | end | |
284 | --FIXME: Do we send unavailable if they are offline? | |
285 | else | |
286 | probe.attr.to = contact; | |
287 | send_to(contact, probe); | |
288 | end | |
289 | end | |
290 | end | |
291 | ||
292 | -- Probe for our contacts' presence | |
293 | end | |
294 | end | |
295 | ||
296 | -- Broadcast presence probes to all of a user's contacts | |
297 | function handle_stanza_presence_probe_broadcast(session, stanza) | |
298 | end | |
299 | ||
300 | -- | |
301 | function handle_stanza_to_server(stanza) | |
302 | end | |
303 | ||
304 | function handle_stanza_iq_no_to(session, stanza) | |
305 | end | |
306 | ]] |