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 cm_register_component = require "core.componentmanager".register_component;
19 local cm_deregister_component = require "core.componentmanager".deregister_component;
20 local uuid_gen = require "util.uuid".generate;
21 local jid_split = require "util.jid".split;
22 local sha1 = require "util.hashes".sha1;
23 local st = require "util.stanza";
24 local init_xmlhandlers = require "core.xmlhandlers";
28 local log = logger.init("componentlistener");
30 local component_listener = { default_port = 5347; default_mode = "*a"; default_interface = config.get("*", "core", "component_interface") or "127.0.0.1" };
32 local xmlns_component = 'jabber:component:accept';
34 --- Callbacks/data for xmlhandlers to handle streams for us ---
36 local stream_callbacks = { default_ns = xmlns_component };
38 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
40 function stream_callbacks.error(session, error, data, data2)
41 if session.destroyed then return; end
42 log("warn", "Error processing component stream: "..tostring(error));
43 if error == "no-stream" then
44 session:close("invalid-namespace");
45 elseif error == "parse-error" then
46 session.log("warn", "External component %s XML parse error: %s", tostring(session.host), tostring(data));
47 session:close("xml-not-well-formed");
48 elseif error == "stream-error" then
49 local condition, text = "undefined-condition";
50 for child in data:children() do
51 if child.attr.xmlns == xmlns_xmpp_streams then
52 if child.name ~= "text" then
53 condition = child.name;
55 text = child:get_text();
57 if condition ~= "undefined-condition" and text then
62 text = condition .. (text and (" ("..text..")") or "");
63 session.log("info", "Session closed by remote with error: %s", text);
64 session:close(nil, text);
68 function stream_callbacks.streamopened(session, attr)
69 if config.get(attr.to, "core", "component_module") ~= "component" then
70 -- Trying to act as a component domain which
71 -- hasn't been configured
72 session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" };
76 -- Note that we don't create the internal component
77 -- until after the external component auths successfully
79 session.host = attr.to;
80 session.streamid = uuid_gen();
81 session.notopen = nil;
83 session.send(st.stanza("stream:stream", { xmlns=xmlns_component,
84 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag());
88 function stream_callbacks.streamclosed(session)
89 session.log("debug", "Received </stream:stream>");
93 local core_process_stanza = core_process_stanza;
95 function stream_callbacks.handlestanza(session, stanza)
96 -- Namespaces are icky.
97 if not stanza.attr.xmlns and stanza.name == "handshake" then
98 stanza.attr.xmlns = xmlns_component;
100 if not stanza.attr.xmlns or stanza.attr.xmlns == "jabber:client" then
101 local from = stanza.attr.from;
103 if session.component_validate_from then
104 local _, domain = jid_split(stanza.attr.from);
105 if domain ~= session.host then
107 session.log("warn", "Component sent stanza with missing or invalid 'from' address");
109 condition = "invalid-from";
110 text = "Component tried to send from address <"..tostring(from)
111 .."> which is not in domain <"..tostring(session.host)..">";
117 stanza.attr.from = session.host;
119 if not stanza.attr.to then
120 session.log("warn", "Rejecting stanza with no 'to' address");
121 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST specify a 'to' address on stanzas"));
125 return core_process_stanza(session, stanza);
128 --- Closing a component connection
129 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
130 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
131 local function session_close(session, reason)
132 if session.destroyed then return; end
133 local log = session.log or log;
135 if session.notopen then
136 session.send("<?xml version='1.0'?>");
137 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
140 if type(reason) == "string" then -- assume stream error
141 log("info", "Disconnecting component, <stream:error> is: %s", reason);
142 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
143 elseif type(reason) == "table" then
144 if reason.condition then
145 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
147 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
150 stanza:add_child(reason.extra);
152 log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza));
153 session.send(stanza);
154 elseif reason.name then -- a stanza
155 log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason));
156 session.send(reason);
160 session.send("</stream:stream>");
161 session.conn:close();
162 component_listener.ondisconnect(session.conn, "stream error");
166 --- Component connlistener
167 function component_listener.onincoming(conn, data)
168 local session = sessions[conn];
170 local _send = conn.write;
171 session = { type = "component", conn = conn, send = function (data) return _send(conn, tostring(data)); end };
172 sessions[conn] = session;
174 -- Logging functions --
176 local conn_name = "jcp"..tostring(conn):match("[a-f0-9]+$");
177 session.log = logger.init(conn_name);
178 session.close = session_close;
180 session.log("info", "Incoming Jabber component connection");
182 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1");
183 session.parser = parser;
185 session.notopen = true;
187 function session.data(conn, data)
188 local ok, err = parser:parse(data);
189 if ok then return; end
190 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
191 session:close("xml-not-well-formed");
194 session.dispatch_stanza = stream_callbacks.handlestanza;
198 session.data(conn, data);
202 function component_listener.ondisconnect(conn, err)
203 local session = sessions[conn];
205 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err));
206 if session.on_destroy then session:on_destroy(err); end
207 if hosts[session.host] then
208 log("debug", "Deregistering component");
209 cm_deregister_component(session.host);
210 hosts[session.host].connected = nil;
212 sessions[conn] = nil;
213 for k in pairs(session) do
214 if k ~= "log" and k ~= "close" then
218 session.destroyed = true;
223 connlisteners.register('xmppcomponent', component_listener);