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 lxp = require "lxp"
14 local init_xmlhandlers = require "core.xmlhandlers"
15 local sm_new_session = require "core.sessionmanager".new_session;
17 local connlisteners_register = require "net.connlisteners".register;
19 local t_insert = table.insert;
20 local t_concat = table.concat;
21 local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end
22 local m_random = math.random;
23 local format = string.format;
24 local sessionmanager = require "core.sessionmanager";
25 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
26 local sm_streamopened = sessionmanager.streamopened;
27 local sm_streamclosed = sessionmanager.streamclosed;
28 local st = require "util.stanza";
30 local config = require "core.configmanager";
31 local opt_keepalives = config.get("*", "core", "tcp_keepalives");
33 local stream_callbacks = { default_ns = "jabber:client",
34 streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
36 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
38 function stream_callbacks.error(session, error, data)
39 if error == "no-stream" then
40 session.log("debug", "Invalid opening stream header");
41 session:close("invalid-namespace");
42 elseif error == "parse-error" then
43 (session.log or log)("debug", "Client XML parse error: %s", tostring(data));
44 session:close("xml-not-well-formed");
45 elseif error == "stream-error" then
46 local condition, text = "undefined-condition";
47 for child in data:children() do
48 if child.attr.xmlns == xmlns_xmpp_streams then
49 if child.name ~= "text" then
50 condition = child.name;
52 text = child:get_text();
54 if condition ~= "undefined-condition" and text then
59 text = condition .. (text and (" ("..text..")") or "");
60 session.log("info", "Session closed by remote with error: %s", text);
61 session:close(nil, text);
65 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), debug.traceback()); end
66 function stream_callbacks.handlestanza(a, b)
67 xpcall(function () core_process_stanza(a, b) end, handleerr);
71 local xmppclient = { default_port = 5222, default_mode = "*a" };
73 -- These are session methods --
75 local function session_reset_stream(session)
77 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1");
78 session.parser = parser;
80 session.notopen = true;
82 function session.data(conn, data)
83 local ok, err = parser:parse(data);
84 if ok then return; end
85 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
86 session:close("xml-not-well-formed");
92 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
93 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
94 local function session_close(session, reason)
95 local log = session.log or log;
97 if session.notopen then
98 session.send("<?xml version='1.0'?>");
99 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
102 if type(reason) == "string" then -- assume stream error
103 log("info", "Disconnecting client, <stream:error> is: %s", reason);
104 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
105 elseif type(reason) == "table" then
106 if reason.condition then
107 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
109 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
112 stanza:add_child(reason.extra);
114 log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
115 session.send(stanza);
116 elseif reason.name then -- a stanza
117 log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
118 session.send(reason);
122 session.send("</stream:stream>");
123 session.conn:close();
124 xmppclient.ondisconnect(session.conn, (reason and (reason.text or reason.condition)) or reason or "session closed");
129 -- End of session methods --
131 function xmppclient.onincoming(conn, data)
132 local session = sessions[conn];
134 session = sm_new_session(conn);
135 sessions[conn] = session;
137 session.log("info", "Client connected");
139 -- Client is using legacy SSL (otherwise mod_tls sets this flag)
141 session.secure = true;
144 if opt_keepalives ~= nil then
145 conn:setoption("keepalive", opt_keepalives);
148 session.reset_stream = session_reset_stream;
149 session.close = session_close;
151 session_reset_stream(session); -- Initialise, ready for use
153 session.dispatch_stanza = stream_callbacks.handlestanza;
156 session.data(conn, data);
160 function xmppclient.ondisconnect(conn, err)
161 local session = sessions[conn];
163 (session.log or log)("info", "Client disconnected: %s", err);
164 sm_destroy_session(session, err);
165 sessions[conn] = nil;
170 connlisteners_register("xmppclient", xmppclient);