Sat, 04 Oct 2008 19:24:43 +0100
Merge from waqas
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) | |
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 | handle_stanza(session, stanza); | |
38 | end | |
39 | end | |
40 | ||
41 | function core_route_stanza(origin, stanza) | |
42 | -- Hooks | |
43 | -- Deliver | |
44 | end | |
45 | ||
46 | function handle_stanza_nodest(stanza) | |
47 | if stanza.name == "iq" then | |
48 | handle_stanza_iq_no_to(session, stanza); | |
49 | elseif stanza.name == "presence" then | |
50 | -- Broadcast to this user's contacts | |
51 | handle_stanza_presence_broadcast(session, stanza); | |
52 | -- also, if it is initial presence, send out presence probes | |
53 | if not session.last_presence then | |
54 | handle_stanza_presence_probe_broadcast(session, stanza); | |
55 | end | |
56 | session.last_presence = stanza; | |
57 | elseif stanza.name == "message" then | |
58 | -- Treat as if message was sent to bare JID of the sender | |
59 | handle_stanza_to_local_user(stanza); | |
60 | end | |
61 | end | |
62 | ||
63 | function handle_stanza_tolocal(stanza) | |
64 | local node, host, resource = jid.split(stanza.attr.to); | |
65 | if host and hosts[host] and hosts[host].type == "local" then | |
66 | -- Is a local host, handle internally | |
67 | if node then | |
68 | -- Is a local user, send to their session | |
69 | log("debug", "Routing stanza to %s@%s", node, host); | |
70 | if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
71 | handle_stanza_to_local_user(stanza); | |
72 | else | |
73 | -- Is sent to this server, let's handle it... | |
74 | log("debug", "Routing stanza to %s", host); | |
75 | handle_stanza_to_server(stanza, session); | |
76 | end | |
77 | end | |
78 | end | |
79 | ||
80 | function handle_stanza_toremote(stanza) | |
81 | log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
82 | end | |
83 | ||
84 | ||
85 | --[[ | |
86 | local function route_c2s_stanza(session, stanza) | |
87 | stanza.attr.from = session.full_jid; | |
88 | if not stanza.attr.to and session.username then | |
89 | -- Has no 'to' attribute, handle internally | |
90 | if stanza.name == "iq" then | |
91 | handle_stanza_iq_no_to(session, stanza); | |
92 | elseif stanza.name == "presence" then | |
93 | -- Broadcast to this user's contacts | |
94 | handle_stanza_presence_broadcast(session, stanza); | |
95 | -- also, if it is initial presence, send out presence probes | |
96 | if not session.last_presence then | |
97 | handle_stanza_presence_probe_broadcast(session, stanza); | |
98 | end | |
99 | session.last_presence = stanza; | |
100 | elseif stanza.name == "message" then | |
101 | -- Treat as if message was sent to bare JID of the sender | |
102 | handle_stanza_to_local_user(stanza); | |
103 | end | |
104 | end | |
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 | if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
111 | handle_stanza_to_local_user(stanza); | |
112 | else | |
113 | -- Is sent to this server, let's handle it... | |
114 | handle_stanza_to_server(stanza, session); | |
115 | end | |
116 | else | |
117 | -- Is not for us or a local user, route accordingly | |
118 | route_s2s_stanza(stanza); | |
119 | end | |
120 | end | |
121 | ||
122 | function handle_stanza_no_to(session, stanza) | |
123 | if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
124 | local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
125 | if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
126 | if iq_handlers[xmlns] then | |
127 | if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
128 | end | |
129 | -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
130 | log("warn", "Unhandled namespace: "..xmlns); | |
131 | session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
132 | return; -- All done! | |
133 | end | |
134 | end | |
135 | ||
136 | function handle_stanza_to_local_user(stanza) | |
137 | if stanza.name == "message" then | |
138 | handle_stanza_message_to_local_user(stanza); | |
139 | elseif stanza.name == "presence" then | |
140 | handle_stanza_presence_to_local_user(stanza); | |
141 | elseif stanza.name == "iq" then | |
142 | handle_stanza_iq_to_local_user(stanza); | |
143 | end | |
144 | end | |
145 | ||
146 | function handle_stanza_message_to_local_user(stanza) | |
147 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
148 | local destuser = hosts[host].sessions[node]; | |
149 | if destuser then | |
150 | if resource and destuser[resource] then | |
151 | destuser[resource]:send(stanza); | |
152 | else | |
153 | -- Bare JID, or resource offline | |
154 | local best_session; | |
155 | for resource, session in pairs(destuser.sessions) do | |
156 | if not best_session then best_session = session; | |
157 | elseif session.priority >= best_session.priority and session.priority >= 0 then | |
158 | best_session = session; | |
159 | end | |
160 | end | |
161 | if not best_session then | |
162 | offlinemessage.new(node, host, stanza); | |
163 | else | |
164 | print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
165 | destuser[best_session]:send(stanza); | |
166 | end | |
167 | end | |
168 | else | |
169 | -- User is offline | |
170 | offlinemessage.new(node, host, stanza); | |
171 | end | |
172 | end | |
173 | ||
174 | function handle_stanza_presence_to_local_user(stanza) | |
175 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
176 | local destuser = hosts[host].sessions[node]; | |
177 | if destuser then | |
178 | if resource then | |
179 | if destuser[resource] then | |
180 | destuser[resource]:send(stanza); | |
181 | else | |
182 | return; | |
183 | end | |
184 | else | |
185 | -- Broadcast to all user's resources | |
186 | for resource, session in pairs(destuser.sessions) do | |
187 | session:send(stanza); | |
188 | end | |
189 | end | |
190 | end | |
191 | end | |
192 | ||
193 | function handle_stanza_iq_to_local_user(stanza) | |
194 | ||
195 | end | |
196 | ||
197 | function foo() | |
198 | local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
199 | local destuser = hosts[host].sessions[node]; | |
200 | if destuser and destuser.sessions then | |
201 | -- User online | |
202 | if resource and destuser.sessions[resource] then | |
203 | stanza.to:send(stanza); | |
204 | else | |
205 | --User is online, but specified resource isn't (or no resource specified) | |
206 | local best_session; | |
207 | for resource, session in pairs(destuser.sessions) do | |
208 | if not best_session then best_session = session; | |
209 | elseif session.priority >= best_session.priority and session.priority >= 0 then | |
210 | best_session = session; | |
211 | end | |
212 | end | |
213 | if not best_session then | |
214 | offlinemessage.new(node, host, stanza); | |
215 | else | |
216 | print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
217 | resource = best_session.resource; | |
218 | end | |
219 | end | |
220 | if destuser.sessions[resource] == session then | |
221 | log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
222 | else | |
223 | print("...sending...", tostring(stanza)); | |
224 | --destuser.sessions[resource].conn.write(tostring(data)); | |
225 | print(" to conn ", destuser.sessions[resource].conn); | |
226 | destuser.sessions[resource].conn.write(tostring(stanza)); | |
227 | print("...sent") | |
228 | end | |
229 | elseif stanza.name == "message" then | |
230 | print(" ...will be stored offline"); | |
231 | offlinemessage.new(node, host, stanza); | |
232 | elseif stanza.name == "iq" then | |
233 | print(" ...is an iq"); | |
234 | stanza.from:send(st.reply(stanza) | |
235 | :tag("error", { type = "cancel" }) | |
236 | :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
237 | end | |
238 | end | |
239 | ||
240 | -- Broadcast a presence stanza to all of a user's contacts | |
241 | function handle_stanza_presence_broadcast(session, stanza) | |
242 | if session.roster then | |
243 | local initial_presence = not session.last_presence; | |
244 | session.last_presence = stanza; | |
245 | ||
246 | -- Broadcast presence and probes | |
247 | local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
248 | ||
249 | for child in stanza:childtags() do | |
250 | broadcast:add_child(child); | |
251 | end | |
252 | for contact_jid in pairs(session.roster) do | |
253 | broadcast.attr.to = contact_jid; | |
254 | send_to(contact_jid, broadcast); | |
255 | if initial_presence then | |
256 | local node, host = jid.split(contact_jid); | |
257 | if hosts[host] and hosts[host].type == "local" then | |
258 | local contact = hosts[host].sessions[node] | |
259 | if contact then | |
260 | local pres = st.presence { to = session.full_jid }; | |
261 | for resource, contact_session in pairs(contact.sessions) do | |
262 | if contact_session.last_presence then | |
263 | pres.tags = contact_session.last_presence.tags; | |
264 | pres.attr.from = contact_session.full_jid; | |
265 | send(pres); | |
266 | end | |
267 | end | |
268 | end | |
269 | --FIXME: Do we send unavailable if they are offline? | |
270 | else | |
271 | probe.attr.to = contact; | |
272 | send_to(contact, probe); | |
273 | end | |
274 | end | |
275 | end | |
276 | ||
277 | -- Probe for our contacts' presence | |
278 | end | |
279 | end | |
280 | ||
281 | -- Broadcast presence probes to all of a user's contacts | |
282 | function handle_stanza_presence_probe_broadcast(session, stanza) | |
283 | end | |
284 | ||
285 | -- | |
286 | function handle_stanza_to_server(stanza) | |
287 | end | |
288 | ||
289 | function handle_stanza_iq_no_to(session, stanza) | |
290 | end | |
291 | ]] |