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 logger = require "logger";
12 local log = logger.init("xmppclient_listener");
13 local new_xmpp_stream = require "util.xmppstream".new;
15 local connlisteners_register = require "net.connlisteners".register;
17 local sessionmanager = require "core.sessionmanager";
18 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
19 local sm_streamopened = sessionmanager.streamopened;
20 local sm_streamclosed = sessionmanager.streamclosed;
21 local st = require "util.stanza";
22 local xpcall = xpcall;
23 local tostring = tostring;
25 local traceback = debug.traceback;
27 local config = require "core.configmanager";
28 local opt_keepalives = config.get("*", "core", "tcp_keepalives");
30 local stream_callbacks = { default_ns = "jabber:client",
31 streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
33 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
35 function stream_callbacks.error(session, error, data)
36 if error == "no-stream" then
37 session.log("debug", "Invalid opening stream header");
38 session:close("invalid-namespace");
39 elseif error == "parse-error" then
40 (session.log or log)("debug", "Client XML parse error: %s", tostring(data));
41 session:close("not-well-formed");
42 elseif error == "stream-error" then
43 local condition, text = "undefined-condition";
44 for child in data:children() do
45 if child.attr.xmlns == xmlns_xmpp_streams then
46 if child.name ~= "text" then
47 condition = child.name;
49 text = child:get_text();
51 if condition ~= "undefined-condition" and text then
56 text = condition .. (text and (" ("..text..")") or "");
57 session.log("info", "Session closed by remote with error: %s", text);
58 session:close(nil, text);
62 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), traceback()); end
63 function stream_callbacks.handlestanza(session, stanza)
64 stanza = session.filter("stanzas/in", stanza);
66 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
71 local xmppclient = { default_port = 5222, default_mode = "*a" };
73 -- These are session methods --
75 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
76 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
77 local function session_close(session, reason)
78 local log = session.log or log;
80 if session.notopen then
81 session.send("<?xml version='1.0'?>");
82 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
85 if type(reason) == "string" then -- assume stream error
86 log("info", "Disconnecting client, <stream:error> is: %s", reason);
87 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
88 elseif type(reason) == "table" then
89 if reason.condition then
90 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
92 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
95 stanza:add_child(reason.extra);
97 log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
99 elseif reason.name then -- a stanza
100 log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
101 session.send(reason);
105 session.send("</stream:stream>");
106 session.conn:close();
107 xmppclient.ondisconnect(session.conn, (reason and (reason.text or reason.condition)) or reason or "session closed");
112 -- End of session methods --
114 function xmppclient.onconnect(conn)
115 local session = sm_new_session(conn);
116 sessions[conn] = session;
118 session.log("info", "Client connected");
120 -- Client is using legacy SSL (otherwise mod_tls sets this flag)
122 session.secure = true;
125 if opt_keepalives ~= nil then
126 conn:setoption("keepalive", opt_keepalives);
129 session.close = session_close;
131 local stream = new_xmpp_stream(session, stream_callbacks);
132 session.stream = stream;
134 session.notopen = true;
136 function session.reset_stream()
137 session.notopen = true;
138 session.stream:reset();
141 local filter = session.filter;
142 function session.data(data)
143 data = filter("bytes/in", data);
145 local ok, err = stream:feed(data);
146 if ok then return; end
147 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
148 session:close("not-well-formed");
152 local handlestanza = stream_callbacks.handlestanza;
153 function session.dispatch_stanza(session, stanza)
154 return handlestanza(session, stanza);
158 function xmppclient.onincoming(conn, data)
159 local session = sessions[conn];
165 function xmppclient.ondisconnect(conn, err)
166 local session = sessions[conn];
168 (session.log or log)("info", "Client disconnected: %s", err);
169 sm_destroy_session(session, err);
170 sessions[conn] = nil;
175 function xmppclient.associate_session(conn, session)
176 sessions[conn] = session;
179 connlisteners_register("xmppclient", xmppclient);