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 hosts = _G.hosts;
12 local t_concat = table.concat;
14 local lxp = require "lxp";
15 local logger = require "util.logger";
16 local config = require "core.configmanager";
17 local connlisteners = require "net.connlisteners";
18 local uuid_gen = require "util.uuid".generate;
19 local jid_split = require "util.jid".split;
20 local sha1 = require "util.hashes".sha1;
21 local st = require "util.stanza";
22 local init_xmlhandlers = require "core.xmlhandlers";
26 local log = logger.init("componentlistener");
28 local component_listener = { default_port = 5347; default_mode = "*a"; default_interface = config.get("*", "core", "component_interface") or "127.0.0.1" };
30 local xmlns_component = 'jabber:component:accept';
32 --- Callbacks/data for xmlhandlers to handle streams for us ---
34 local stream_callbacks = { default_ns = xmlns_component };
36 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
38 function stream_callbacks.error(session, error, data, data2)
39 if session.destroyed then return; end
40 log("warn", "Error processing component stream: "..tostring(error));
41 if error == "no-stream" then
42 session:close("invalid-namespace");
43 elseif error == "parse-error" then
44 session.log("warn", "External component %s XML parse error: %s", tostring(session.host), tostring(data));
45 session:close("xml-not-well-formed");
46 elseif error == "stream-error" then
47 local condition, text = "undefined-condition";
48 for child in data:children() do
49 if child.attr.xmlns == xmlns_xmpp_streams then
50 if child.name ~= "text" then
51 condition = child.name;
53 text = child:get_text();
55 if condition ~= "undefined-condition" and text then
60 text = condition .. (text and (" ("..text..")") or "");
61 session.log("info", "Session closed by remote with error: %s", text);
62 session:close(nil, text);
66 function stream_callbacks.streamopened(session, attr)
67 if config.get(attr.to, "core", "component_module") ~= "component" then
68 -- Trying to act as a component domain which
69 -- hasn't been configured
70 session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" };
74 -- Note that we don't create the internal component
75 -- until after the external component auths successfully
77 session.host = attr.to;
78 session.streamid = uuid_gen();
79 session.notopen = nil;
81 session.send(st.stanza("stream:stream", { xmlns=xmlns_component,
82 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag());
86 function stream_callbacks.streamclosed(session)
87 session.log("debug", "Received </stream:stream>");
91 local core_process_stanza = core_process_stanza;
93 function stream_callbacks.handlestanza(session, stanza)
94 -- Namespaces are icky.
95 if not stanza.attr.xmlns and stanza.name == "handshake" then
96 stanza.attr.xmlns = xmlns_component;
98 if not stanza.attr.xmlns or stanza.attr.xmlns == "jabber:client" then
99 local from = stanza.attr.from;
101 if session.component_validate_from then
102 local _, domain = jid_split(stanza.attr.from);
103 if domain ~= session.host then
105 session.log("warn", "Component sent stanza with missing or invalid 'from' address");
107 condition = "invalid-from";
108 text = "Component tried to send from address <"..tostring(from)
109 .."> which is not in domain <"..tostring(session.host)..">";
115 stanza.attr.from = session.host;
117 if not stanza.attr.to then
118 session.log("warn", "Rejecting stanza with no 'to' address");
119 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST specify a 'to' address on stanzas"));
123 return core_process_stanza(session, stanza);
126 --- Closing a component connection
127 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
128 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
129 local function session_close(session, reason)
130 if session.destroyed then return; end
131 local log = session.log or log;
133 if session.notopen then
134 session.send("<?xml version='1.0'?>");
135 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
138 if type(reason) == "string" then -- assume stream error
139 log("info", "Disconnecting component, <stream:error> is: %s", reason);
140 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
141 elseif type(reason) == "table" then
142 if reason.condition then
143 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
145 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
148 stanza:add_child(reason.extra);
150 log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza));
151 session.send(stanza);
152 elseif reason.name then -- a stanza
153 log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason));
154 session.send(reason);
158 session.send("</stream:stream>");
159 session.conn:close();
160 component_listener.ondisconnect(session.conn, "stream error");
164 --- Component connlistener
165 function component_listener.onincoming(conn, data)
166 local session = sessions[conn];
168 local _send = conn.write;
169 session = { type = "component", conn = conn, send = function (data) return _send(conn, tostring(data)); end };
170 sessions[conn] = session;
172 -- Logging functions --
174 local conn_name = "jcp"..tostring(conn):match("[a-f0-9]+$");
175 session.log = logger.init(conn_name);
176 session.close = session_close;
178 session.log("info", "Incoming Jabber component connection");
180 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1");
181 session.parser = parser;
183 session.notopen = true;
185 function session.data(conn, data)
186 local ok, err = parser:parse(data);
187 if ok then return; end
188 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
189 session:close("xml-not-well-formed");
192 session.dispatch_stanza = stream_callbacks.handlestanza;
196 session.data(conn, data);
200 function component_listener.ondisconnect(conn, err)
201 local session = sessions[conn];
203 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err));
204 if session.on_destroy then session:on_destroy(err); end
205 sessions[conn] = nil;
206 for k in pairs(session) do
207 if k ~= "log" and k ~= "close" then
211 session.destroyed = true;
216 connlisteners.register('xmppcomponent', component_listener);