2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 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("xmppserver_listener");
13 local lxp = require "lxp"
14 local init_xmlhandlers = require "core.xmlhandlers"
15 local s2s_new_incoming = require "core.s2smanager".new_incoming;
16 local s2s_streamopened = require "core.s2smanager".streamopened;
17 local s2s_streamclosed = require "core.s2smanager".streamclosed;
18 local s2s_destroy_session = require "core.s2smanager".destroy_session;
19 local s2s_attempt_connect = require "core.s2smanager".attempt_connection;
20 local stream_callbacks = { default_ns = "jabber:server",
21 streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
23 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
25 function stream_callbacks.error(session, error, data)
26 if error == "no-stream" then
27 session:close("invalid-namespace");
28 elseif error == "parse-error" then
29 session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
30 session:close("xml-not-well-formed");
31 elseif error == "stream-error" then
32 local condition, text = "undefined-condition";
33 for child in data:children() do
34 if child.attr.xmlns == xmlns_xmpp_streams then
35 if child.name ~= "text" then
36 condition = child.name;
38 text = child:get_text();
40 if condition ~= "undefined-condition" and text then
45 text = condition .. (text and (" ("..text..")") or "");
46 session.log("info", "Session closed by remote with error: %s", text);
47 session:close(nil, text);
51 local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), debug.traceback()); end
52 function stream_callbacks.handlestanza(a, b)
53 xpcall(function () core_process_stanza(a, b) end, handleerr);
56 local connlisteners_register = require "net.connlisteners".register;
58 local t_insert = table.insert;
59 local t_concat = table.concat;
60 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
61 local m_random = math.random;
62 local format = string.format;
63 local sessionmanager = require "core.sessionmanager";
64 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
65 local st = require "util.stanza";
68 local xmppserver = { default_port = 5269, default_mode = "*a" };
70 -- These are session methods --
72 local function session_reset_stream(session)
74 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1");
75 session.parser = parser;
77 session.notopen = true;
79 function session.data(conn, data)
80 local ok, err = parser:parse(data);
81 if ok then return; end
82 (session.log or log)("warn", "Received invalid XML: %s", data);
83 (session.log or log)("warn", "Problem was: %s", err);
84 session:close("xml-not-well-formed");
90 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
91 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
92 local function session_close(session, reason, remote_reason)
93 local log = session.log or log;
95 if session.notopen then
96 session.sends2s("<?xml version='1.0'?>");
97 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
100 if type(reason) == "string" then -- assume stream error
101 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
102 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
103 elseif type(reason) == "table" then
104 if reason.condition then
105 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
107 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
110 stanza:add_child(reason.extra);
112 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
113 session.sends2s(stanza);
114 elseif reason.name then -- a stanza
115 log("info", "Disconnecting %s->%s[%s], <stream:error> is: %s", session.from_host or "(unknown host)", session.to_host or "(unknown host)", session.type, tostring(reason));
116 session.sends2s(reason);
120 session.sends2s("</stream:stream>");
121 if session.notopen or not session.conn:close() then
122 session.conn:close(true); -- Force FIXME: timer?
124 session.conn:close();
125 xmppserver.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed");
130 -- End of session methods --
132 function xmppserver.onincoming(conn, data)
133 local session = sessions[conn];
135 session = s2s_new_incoming(conn);
136 sessions[conn] = session;
138 -- Logging functions --
141 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
142 session.log = logger.init(conn_name);
144 session.log("info", "Incoming s2s connection");
146 session.reset_stream = session_reset_stream;
147 session.close = session_close;
149 session_reset_stream(session); -- Initialise, ready for use
151 session.dispatch_stanza = stream_callbacks.handlestanza;
154 session.data(conn, data);
158 function xmppserver.onstatus(conn, status)
159 if status == "ssl-handshake-complete" then
160 local session = sessions[conn];
161 if session and session.direction == "outgoing" then
162 local format, to_host, from_host = string.format, session.to_host, session.from_host;
163 session.log("debug", "Sending stream header...");
164 session.sends2s(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host));
169 function xmppserver.ondisconnect(conn, err)
170 local session = sessions[conn];
172 if err and err ~= "closed" and session.srv_hosts then
173 (session.log or log)("debug", "s2s connection attempt failed: %s", err);
174 if s2s_attempt_connect(session, err) then
175 (session.log or log)("debug", "...so we're going to try another target");
176 return; -- Session lives for now
179 (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err));
180 s2s_destroy_session(session, err);
181 sessions[conn] = nil;
186 function xmppserver.register_outgoing(conn, session)
187 session.direction = "outgoing";
188 sessions[conn] = session;
190 session.reset_stream = session_reset_stream;
191 session.close = session_close;
192 session_reset_stream(session); -- Initialise, ready for use
194 --local function handleerr(err) print("Traceback:", err, debug.traceback()); end
195 --session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end
198 connlisteners_register("xmppserver", xmppserver);
201 -- We need to perform some initialisation when a connection is created
202 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
204 -- ...and we need to handle data
205 -- ...and record all sessions associated with connections