Wed, 08 Oct 2008 04:49:55 +0500
Added: Local 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 | ||
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10 | local st = require "util.stanza"; |
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11 | local send = require "core.sessionmanager".send_to_session; |
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12 | |
30 | 13 | require "util.jid" |
14 | local jid_split = jid.split; | |
15 | ||
16 | function core_process_stanza(origin, stanza) | |
66 | 17 | log("debug", "Received: "..tostring(stanza)) |
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18 | -- TODO verify validity of stanza |
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19 | |
30 | 20 | local to = stanza.attr.to; |
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21 | stanza.attr.from = origin.full_jid -- quick fix to prevent impersonation |
30 | 22 | |
23 | if not to or (hosts[to] and hosts[to].type == "local") then | |
24 | core_handle_stanza(origin, stanza); | |
25 | elseif origin.type == "c2s" then | |
26 | core_route_stanza(origin, stanza); | |
27 | end | |
28 | end | |
29 | ||
30 | function core_handle_stanza(origin, stanza) | |
31 | -- Handlers | |
32 | if origin.type == "c2s" or origin.type == "c2s_unauthed" then | |
33 | local session = origin; | |
34 | stanza.attr.from = session.full_jid; | |
35 | ||
36 | log("debug", "Routing stanza"); | |
37 | -- Stanza has no to attribute | |
38 | --local to_node, to_host, to_resource = jid_split(stanza.attr.to); | |
39 | --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 | |
40 | ||
41 | -- Stanza is to this server, or a user on this server | |
42 | log("debug", "Routing stanza to local"); | |
43 | handle_stanza(session, stanza); | |
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44 | end |
30 | 45 | end |
46 | ||
47 | function core_route_stanza(origin, stanza) | |
48 | -- Hooks | |
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49 | --- ...later |
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50 | |
30 | 51 | -- Deliver |
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52 | local node, host, resource = jid_split(stanza.attr.to); |
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53 | local host_session = hosts[host] |
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54 | if host_session and host_session.type == "local" then |
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55 | -- Local host |
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56 | local user = host_session.sessions[node]; |
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57 | if user then |
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58 | local res = nil; |
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59 | if resource then |
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60 | res = user.sessions[resource]; |
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61 | end |
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62 | -- TODO do something about presence broadcast |
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63 | if not res then |
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64 | -- if we get here, resource was not specified or was unavailable |
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65 | for k in pairs(user.sessions) do |
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66 | res = user.sessions[k]; |
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67 | break; |
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68 | end |
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69 | -- TODO find resource with greatest priority |
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70 | end |
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71 | stanza.attr.to = res.full_jid; |
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72 | send(res, stanza); -- Yay \o/ |
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73 | else |
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74 | -- user not found |
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75 | send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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76 | end |
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77 | else |
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78 | -- Remote host |
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79 | if host_session then |
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80 | -- Send to session |
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81 | else |
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82 | -- Need to establish the connection |
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83 | end |
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84 | end |
30 | 85 | end |
86 | ||
87 | function handle_stanza_nodest(stanza) | |
88 | if stanza.name == "iq" then | |
89 | handle_stanza_iq_no_to(session, stanza); | |
90 | elseif stanza.name == "presence" then | |
91 | -- Broadcast to this user's contacts | |
92 | handle_stanza_presence_broadcast(session, stanza); | |
93 | -- also, if it is initial presence, send out presence probes | |
94 | if not session.last_presence then | |
95 | handle_stanza_presence_probe_broadcast(session, stanza); | |
96 | end | |
97 | session.last_presence = stanza; | |
98 | elseif stanza.name == "message" then | |
99 | -- Treat as if message was sent to bare JID of the sender | |
100 | handle_stanza_to_local_user(stanza); | |
101 | end | |
102 | end | |
103 | ||
104 | function handle_stanza_tolocal(stanza) | |
105 | local node, host, resource = jid.split(stanza.attr.to); | |
106 | if host and hosts[host] and hosts[host].type == "local" then | |
107 | -- Is a local host, handle internally | |
108 | if node then | |
109 | -- Is a local user, send to their session | |
110 | log("debug", "Routing stanza to %s@%s", node, host); | |
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 | log("debug", "Routing stanza to %s", host); | |
116 | handle_stanza_to_server(stanza, session); | |
117 | end | |
118 | end | |
119 | end | |
120 | ||
121 | function handle_stanza_toremote(stanza) | |
122 | log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
123 | end | |
124 | ||
125 | ||
126 | --[[ | |
127 | local function route_c2s_stanza(session, stanza) | |
128 | stanza.attr.from = session.full_jid; | |
129 | if not stanza.attr.to and session.username then | |
130 | -- Has no 'to' attribute, handle internally | |
131 | if stanza.name == "iq" then | |
132 | handle_stanza_iq_no_to(session, stanza); | |
133 | elseif stanza.name == "presence" then | |
134 | -- Broadcast to this user's contacts | |
135 | handle_stanza_presence_broadcast(session, stanza); | |
136 | -- also, if it is initial presence, send out presence probes | |
137 | if not session.last_presence then | |
138 | handle_stanza_presence_probe_broadcast(session, stanza); | |
139 | end | |
140 | session.last_presence = stanza; | |
141 | elseif stanza.name == "message" then | |
142 | -- Treat as if message was sent to bare JID of the sender | |
143 | handle_stanza_to_local_user(stanza); | |
144 | end | |
145 | end | |
146 | local node, host, resource = jid.split(stanza.attr.to); | |
147 | if host and hosts[host] and hosts[host].type == "local" then | |
148 | -- Is a local host, handle internally | |
149 | if node then | |
150 | -- Is a local user, send to their session | |
151 | if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
152 | handle_stanza_to_local_user(stanza); | |
153 | else | |
154 | -- Is sent to this server, let's handle it... | |
155 | handle_stanza_to_server(stanza, session); | |
156 | end | |
157 | else | |
158 | -- Is not for us or a local user, route accordingly | |
159 | route_s2s_stanza(stanza); | |
160 | end | |
161 | end | |
162 | ||
163 | function handle_stanza_no_to(session, stanza) | |
164 | if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
165 | local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
166 | if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
167 | if iq_handlers[xmlns] then | |
168 | if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
169 | end | |
170 | -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
171 | log("warn", "Unhandled namespace: "..xmlns); | |
172 | session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
173 | return; -- All done! | |
174 | end | |
175 | end | |
176 | ||
177 | function handle_stanza_to_local_user(stanza) | |
178 | if stanza.name == "message" then | |
179 | handle_stanza_message_to_local_user(stanza); | |
180 | elseif stanza.name == "presence" then | |
181 | handle_stanza_presence_to_local_user(stanza); | |
182 | elseif stanza.name == "iq" then | |
183 | handle_stanza_iq_to_local_user(stanza); | |
184 | end | |
185 | end | |
186 | ||
187 | function handle_stanza_message_to_local_user(stanza) | |
188 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
189 | local destuser = hosts[host].sessions[node]; | |
190 | if destuser then | |
191 | if resource and destuser[resource] then | |
192 | destuser[resource]:send(stanza); | |
193 | else | |
194 | -- Bare JID, or resource offline | |
195 | local best_session; | |
196 | for resource, session in pairs(destuser.sessions) do | |
197 | if not best_session then best_session = session; | |
198 | elseif session.priority >= best_session.priority and session.priority >= 0 then | |
199 | best_session = session; | |
200 | end | |
201 | end | |
202 | if not best_session then | |
203 | offlinemessage.new(node, host, stanza); | |
204 | else | |
205 | print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
206 | destuser[best_session]:send(stanza); | |
207 | end | |
208 | end | |
209 | else | |
210 | -- User is offline | |
211 | offlinemessage.new(node, host, stanza); | |
212 | end | |
213 | end | |
214 | ||
215 | function handle_stanza_presence_to_local_user(stanza) | |
216 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
217 | local destuser = hosts[host].sessions[node]; | |
218 | if destuser then | |
219 | if resource then | |
220 | if destuser[resource] then | |
221 | destuser[resource]:send(stanza); | |
222 | else | |
223 | return; | |
224 | end | |
225 | else | |
226 | -- Broadcast to all user's resources | |
227 | for resource, session in pairs(destuser.sessions) do | |
228 | session:send(stanza); | |
229 | end | |
230 | end | |
231 | end | |
232 | end | |
233 | ||
234 | function handle_stanza_iq_to_local_user(stanza) | |
235 | ||
236 | end | |
237 | ||
238 | function foo() | |
239 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
240 | local destuser = hosts[host].sessions[node]; | |
241 | if destuser and destuser.sessions then | |
242 | -- User online | |
243 | if resource and destuser.sessions[resource] then | |
244 | stanza.to:send(stanza); | |
245 | else | |
246 | --User is online, but specified resource isn't (or no resource specified) | |
247 | local best_session; | |
248 | for resource, session in pairs(destuser.sessions) do | |
249 | if not best_session then best_session = session; | |
250 | elseif session.priority >= best_session.priority and session.priority >= 0 then | |
251 | best_session = session; | |
252 | end | |
253 | end | |
254 | if not best_session then | |
255 | offlinemessage.new(node, host, stanza); | |
256 | else | |
257 | print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
258 | resource = best_session.resource; | |
259 | end | |
260 | end | |
261 | if destuser.sessions[resource] == session then | |
262 | log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
263 | else | |
264 | print("...sending...", tostring(stanza)); | |
265 | --destuser.sessions[resource].conn.write(tostring(data)); | |
266 | print(" to conn ", destuser.sessions[resource].conn); | |
267 | destuser.sessions[resource].conn.write(tostring(stanza)); | |
268 | print("...sent") | |
269 | end | |
270 | elseif stanza.name == "message" then | |
271 | print(" ...will be stored offline"); | |
272 | offlinemessage.new(node, host, stanza); | |
273 | elseif stanza.name == "iq" then | |
274 | print(" ...is an iq"); | |
275 | stanza.from:send(st.reply(stanza) | |
276 | :tag("error", { type = "cancel" }) | |
277 | :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
278 | end | |
279 | end | |
280 | ||
281 | -- Broadcast a presence stanza to all of a user's contacts | |
282 | function handle_stanza_presence_broadcast(session, stanza) | |
283 | if session.roster then | |
284 | local initial_presence = not session.last_presence; | |
285 | session.last_presence = stanza; | |
286 | ||
287 | -- Broadcast presence and probes | |
288 | local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
289 | ||
290 | for child in stanza:childtags() do | |
291 | broadcast:add_child(child); | |
292 | end | |
293 | for contact_jid in pairs(session.roster) do | |
294 | broadcast.attr.to = contact_jid; | |
295 | send_to(contact_jid, broadcast); | |
296 | if initial_presence then | |
297 | local node, host = jid.split(contact_jid); | |
298 | if hosts[host] and hosts[host].type == "local" then | |
299 | local contact = hosts[host].sessions[node] | |
300 | if contact then | |
301 | local pres = st.presence { to = session.full_jid }; | |
302 | for resource, contact_session in pairs(contact.sessions) do | |
303 | if contact_session.last_presence then | |
304 | pres.tags = contact_session.last_presence.tags; | |
305 | pres.attr.from = contact_session.full_jid; | |
306 | send(pres); | |
307 | end | |
308 | end | |
309 | end | |
310 | --FIXME: Do we send unavailable if they are offline? | |
311 | else | |
312 | probe.attr.to = contact; | |
313 | send_to(contact, probe); | |
314 | end | |
315 | end | |
316 | end | |
317 | ||
318 | -- Probe for our contacts' presence | |
319 | end | |
320 | end | |
321 | ||
322 | -- Broadcast presence probes to all of a user's contacts | |
323 | function handle_stanza_presence_probe_broadcast(session, stanza) | |
324 | end | |
325 | ||
326 | -- | |
327 | function handle_stanza_to_server(stanza) | |
328 | end | |
329 | ||
330 | function handle_stanza_iq_no_to(session, stanza) | |
331 | end | |
332 | ]] |