2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
11 local add_task = require "util.timer".add_task;
12 local new_xmpp_stream = require "util.xmppstream".new;
13 local nameprep = require "util.encodings".stringprep.nameprep;
14 local sessionmanager = require "core.sessionmanager";
15 local st = require "util.stanza";
16 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
17 local uuid_generate = require "util.uuid".generate;
19 local xpcall, tostring, type = xpcall, tostring, type;
20 local traceback = debug.traceback;
22 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
24 local log = module._log;
26 local c2s_timeout = module:get_option_number("c2s_timeout");
27 local stream_close_timeout = module:get_option_number("c2s_close_timeout", 5);
28 local opt_keepalives = module:get_option_boolean("c2s_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true));
30 local sessions = module:shared("sessions");
31 local core_process_stanza = prosody.core_process_stanza;
32 local hosts = prosody.hosts;
34 local stream_callbacks = { default_ns = "jabber:client", handlestanza = core_process_stanza };
37 --- Stream events handlers
38 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
39 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
41 function stream_callbacks.streamopened(session, attr)
42 local send = session.send;
43 session.host = nameprep(attr.to);
44 if not session.host then
45 session:close{ condition = "improper-addressing",
46 text = "A valid 'to' attribute is required on stream headers" };
49 session.version = tonumber(attr.version) or 0;
50 session.streamid = uuid_generate();
51 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
53 if not hosts[session.host] or not hosts[session.host].modules.c2s then
54 -- We don't serve this host...
55 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
59 send("<?xml version='1.0'?>"..st.stanza("stream:stream", {
60 xmlns = 'jabber:client', ["xmlns:stream"] = 'http://etherx.jabber.org/streams';
61 id = session.streamid, from = session.host, version = '1.0', ["xml:lang"] = 'en' }):top_tag());
63 (session.log or log)("debug", "Sent reply <stream:stream> to client");
64 session.notopen = nil;
66 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
67 -- since we now have a new stream header, session is secured
68 if session.secure == false then
69 session.secure = true;
71 -- Check if TLS compression is used
72 local sock = session.conn:socket();
74 session.compressed = sock:info"compression";
75 elseif sock.compression then
76 session.compressed = sock:compression(); --COMPAT mw/luasec-hg
80 local features = st.stanza("stream:features");
81 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
85 function stream_callbacks.streamclosed(session)
86 session.log("debug", "Received </stream:stream>");
90 function stream_callbacks.error(session, error, data)
91 if error == "no-stream" then
92 session.log("debug", "Invalid opening stream header");
93 session:close("invalid-namespace");
94 elseif error == "parse-error" then
95 (session.log or log)("debug", "Client XML parse error: %s", tostring(data));
96 session:close("not-well-formed");
97 elseif error == "stream-error" then
98 local condition, text = "undefined-condition";
99 for child in data:children() do
100 if child.attr.xmlns == xmlns_xmpp_streams then
101 if child.name ~= "text" then
102 condition = child.name;
104 text = child:get_text();
106 if condition ~= "undefined-condition" and text then
111 text = condition .. (text and (" ("..text..")") or "");
112 session.log("info", "Session closed by remote with error: %s", text);
113 session:close(nil, text);
117 local function handleerr(err) log("error", "Traceback[c2s]: %s", traceback(tostring(err), 2)); end
118 function stream_callbacks.handlestanza(session, stanza)
119 stanza = session.filter("stanzas/in", stanza);
121 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
126 local function session_close(session, reason)
127 local log = session.log or log;
129 if session.notopen then
130 session.send("<?xml version='1.0'?>");
131 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
133 if reason then -- nil == no err, initiated by us, false == initiated by client
134 local stream_error = st.stanza("stream:error");
135 if type(reason) == "string" then -- assume stream error
136 stream_error:tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' });
137 elseif type(reason) == "table" then
138 if reason.condition then
139 stream_error:tag(reason.condition, stream_xmlns_attr):up();
141 stream_error:tag("text", stream_xmlns_attr):text(reason.text):up();
144 stream_error:add_child(reason.extra);
146 elseif reason.name then -- a stanza
147 stream_error = reason;
150 stream_error = tostring(stream_error);
151 log("debug", "Disconnecting client, <stream:error> is: %s", stream_error);
152 session.send(stream_error);
155 session.send("</stream:stream>");
156 function session.send() return false; end
158 local reason = (reason and (reason.name or reason.text or reason.condition)) or reason;
159 session.log("info", "c2s stream for %s closed: %s", session.full_jid or ("<"..session.ip..">"), reason or "session closed");
161 -- Authenticated incoming stream may still be sending us stanzas, so wait for </stream:stream> from remote
162 local conn = session.conn;
163 if reason == nil and not session.notopen and session.type == "c2s" then
164 -- Grace time to process data from authenticated cleanly-closed stream
165 add_task(stream_close_timeout, function ()
166 if not session.destroyed then
167 session.log("warn", "Failed to receive a stream close response, closing connection anyway...");
168 sm_destroy_session(session, reason);
173 sm_destroy_session(session, reason);
179 module:hook_global("user-deleted", function(event)
180 local username, host = event.username, event.host;
181 local user = hosts[host].sessions[username];
182 if user and user.sessions then
183 for jid, session in pairs(user.sessions) do
184 session:close{ condition = "not-authorized", text = "Account deleted" };
190 function listener.onconnect(conn)
191 local session = sm_new_session(conn);
192 sessions[conn] = session;
194 session.log("info", "Client connected");
196 -- Client is using legacy SSL (otherwise mod_tls sets this flag)
198 session.secure = true;
200 -- Check if TLS compression is used
201 local sock = conn:socket();
203 session.compressed = sock:info"compression";
204 elseif sock.compression then
205 session.compressed = sock:compression(); --COMPAT mw/luasec-hg
209 if opt_keepalives then
210 conn:setoption("keepalive", opt_keepalives);
213 session.close = session_close;
215 local stream = new_xmpp_stream(session, stream_callbacks);
216 session.stream = stream;
217 session.notopen = true;
219 function session.reset_stream()
220 session.notopen = true;
221 session.stream:reset();
224 local filter = session.filter;
225 function session.data(data)
226 data = filter("bytes/in", data);
228 local ok, err = stream:feed(data);
229 if ok then return; end
230 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
231 session:close("not-well-formed");
237 add_task(c2s_timeout, function ()
238 if session.type == "c2s_unauthed" then
239 session:close("connection-timeout");
244 session.dispatch_stanza = stream_callbacks.handlestanza;
247 function listener.onincoming(conn, data)
248 local session = sessions[conn];
254 function listener.ondisconnect(conn, err)
255 local session = sessions[conn];
257 (session.log or log)("info", "Client disconnected: %s", err or "connection closed");
258 sm_destroy_session(session, err);
259 sessions[conn] = nil;
263 function listener.onreadtimeout(conn)
264 local session = sessions[conn];
266 return (hosts[session.host] or prosody).events.fire_event("c2s-read-timeout", { session = session });
270 local function keepalive(event)
271 return event.session.send(' ');
274 function listener.associate_session(conn, session)
275 sessions[conn] = session;
278 function module.add_host(module)
279 module:hook("c2s-read-timeout", keepalive, -1);
282 module:hook("c2s-read-timeout", keepalive, -1);
284 module:hook("server-stopping", function(event)
285 local reason = event.reason;
286 for _, session in pairs(sessions) do
287 session:close{ condition = "system-shutdown", text = reason };
293 module:provides("net", {
297 encryption = "starttls";
299 pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:client%1.*>";
303 module:provides("net", {
308 pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:client%1.*>";