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.
10 local tostring = tostring;
12 local xpcall = xpcall;
13 local s_format = string.format;
14 local traceback = debug.traceback;
16 local logger = require "logger";
17 local log = logger.init("xmppserver_listener");
18 local st = require "util.stanza";
19 local connlisteners_register = require "net.connlisteners".register;
20 local new_xmpp_stream = require "util.xmppstream".new;
21 local s2s_new_incoming = require "core.s2smanager".new_incoming;
22 local s2s_streamopened = require "core.s2smanager".streamopened;
23 local s2s_streamclosed = require "core.s2smanager".streamclosed;
24 local s2s_destroy_session = require "core.s2smanager".destroy_session;
25 local s2s_attempt_connect = require "core.s2smanager".attempt_connection;
26 local stream_callbacks = { default_ns = "jabber:server",
27 streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
29 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
31 function stream_callbacks.error(session, error, data)
32 if error == "no-stream" then
33 session:close("invalid-namespace");
34 elseif error == "parse-error" then
35 session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
36 session:close("not-well-formed");
37 elseif error == "stream-error" then
38 local condition, text = "undefined-condition";
39 for child in data:children() do
40 if child.attr.xmlns == xmlns_xmpp_streams then
41 if child.name ~= "text" then
42 condition = child.name;
44 text = child:get_text();
46 if condition ~= "undefined-condition" and text then
51 text = condition .. (text and (" ("..text..")") or "");
52 session.log("info", "Session closed by remote with error: %s", text);
53 session:close(nil, text);
57 local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end
58 function stream_callbacks.handlestanza(session, stanza)
59 if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client
60 stanza.attr.xmlns = nil;
62 stanza = session.filter("stanzas/in", stanza);
64 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
69 local xmppserver = { default_port = 5269, default_mode = "*a" };
71 -- These are session methods --
73 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
74 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
75 local function session_close(session, reason, remote_reason)
76 local log = session.log or log;
78 if session.notopen then
79 session.sends2s("<?xml version='1.0'?>");
80 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
83 if type(reason) == "string" then -- assume stream error
84 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
85 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
86 elseif type(reason) == "table" then
87 if reason.condition then
88 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
90 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
93 stanza:add_child(reason.extra);
95 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
96 session.sends2s(stanza);
97 elseif reason.name then -- a stanza
98 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));
99 session.sends2s(reason);
103 session.sends2s("</stream:stream>");
104 if session.notopen or not session.conn:close() then
105 session.conn:close(true); -- Force FIXME: timer?
107 session.conn:close();
108 xmppserver.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed");
113 -- End of session methods --
115 local function initialize_session(session)
116 local stream = new_xmpp_stream(session, stream_callbacks);
117 session.stream = stream;
119 session.notopen = true;
121 function session.reset_stream()
122 session.notopen = true;
123 session.stream:reset();
126 local filter = session.filter;
127 function session.data(data)
128 data = filter("bytes/in", data);
130 local ok, err = stream:feed(data);
131 if ok then return; end
132 (session.log or log)("warn", "Received invalid XML: %s", data);
133 (session.log or log)("warn", "Problem was: %s", err);
134 session:close("not-well-formed");
138 session.close = session_close;
139 local handlestanza = stream_callbacks.handlestanza;
140 function session.dispatch_stanza(session, stanza)
141 return handlestanza(session, stanza);
145 function xmppserver.onconnect(conn)
146 if not sessions[conn] then -- May be an existing outgoing session
147 local session = s2s_new_incoming(conn);
148 sessions[conn] = session;
150 -- Logging functions --
151 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
152 session.log = logger.init(conn_name);
154 session.log("info", "Incoming s2s connection");
156 initialize_session(session);
160 function xmppserver.onincoming(conn, data)
161 local session = sessions[conn];
167 function xmppserver.onstatus(conn, status)
168 if status == "ssl-handshake-complete" then
169 local session = sessions[conn];
170 if session and session.direction == "outgoing" then
171 local to_host, from_host = session.to_host, session.from_host;
172 session.log("debug", "Sending stream header...");
173 session.sends2s(s_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));
178 function xmppserver.ondisconnect(conn, err)
179 local session = sessions[conn];
181 if err and err ~= "closed" and session.srv_hosts then
182 (session.log or log)("debug", "s2s connection attempt failed: %s", err);
183 if s2s_attempt_connect(session, err) then
184 (session.log or log)("debug", "...so we're going to try another target");
185 return; -- Session lives for now
188 (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err or "closed"));
189 s2s_destroy_session(session, err);
190 sessions[conn] = nil;
195 function xmppserver.register_outgoing(conn, session)
196 session.direction = "outgoing";
197 sessions[conn] = session;
199 initialize_session(session);
202 connlisteners_register("xmppserver", xmppserver);
205 -- We need to perform some initialisation when a connection is created
206 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
208 -- ...and we need to handle data
209 -- ...and record all sessions associated with connections