mod_component: Vastly reduce the code, having split most of it to where it should be, xmppcomponent_listener

plugins/mod_component.lua

@@ -33,74 +33,18 @@ local component_listener = { default_port = 5347; default_mode = "*a"; default_i
 
 local xmlns_component = 'jabber:component:accept';
 
---- Callbacks/data for xmlhandlers to handle streams for us ---
-
-local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams|stream", default_ns = xmlns_component };
-
-function stream_callbacks.error(session, error, data, data2)
-	log("warn", "Error processing component stream: "..tostring(error));
-	if error == "no-stream" then
-		session:close("invalid-namespace");
-	elseif error == "xml-parse-error" and data == "unexpected-element-close" then
-		session.log("debug", "Unexpected close of '%s' tag", data2);
-		session:close("xml-not-well-formed");
-	else
-		session.log("debug", "External component %s XML parse error: %s", tostring(session.host), tostring(error));
-		print(data, debug.traceback())
-		session:close("xml-not-well-formed");
-	end
-end
-
-function stream_callbacks.streamopened(session, attr)
-	if config.get(attr.to, "core", "component_module") ~= "component" then
-		-- Trying to act as a component domain which 
-		-- hasn't been configured
-		session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" };
-		return;
-	end
-	
-	-- Store the original host (this is used for config, etc.)
-	session.user = attr.to;
-	-- Set the host for future reference
-	session.host = config.get(attr.to, "core", "component_address") or attr.to;
-	-- Note that we don't create the internal component 
-	-- until after the external component auths successfully
-
-	session.streamid = uuid_gen();
-	session.notopen = nil;
-	
-	session.send(st.stanza("stream:stream", { xmlns=xmlns_component,
-			["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag());
-
-end
-
-function stream_callbacks.streamclosed(session)
-	session.send("</stream:stream>");
-	session.notopen = true;
-end
-
-local core_process_stanza = core_process_stanza;
-
-function stream_callbacks.handlestanza(session, stanza)
-	-- Namespaces are icky.
-	log("warn", "Handing stanza with name %s", stanza.name);
-	if stanza.name ~= "handshake" then
-		return core_process_stanza(session, stanza);
-	else
-		handle_component_auth(session, stanza);
-	end
-end
-
 --- Handle authentication attempts by components
 function handle_component_auth(session, stanza)
+	log("info", "Handling component auth");
 	if (not session.host) or #stanza.tags > 0 then
+		(session.log or log)("warn", "Component handshake invalid");
 		session:close("not-authorized");
 		return;
 	end
 	
 	local secret = config.get(session.user, "core", "component_secret");
 	if not secret then
-		log("warn", "Component attempted to identify as %s, but component_password is not set", session.user);
+		(session.log or log)("warn", "Component attempted to identify as %s, but component_password is not set", session.user);
 		session:close("not-authorized");
 		return;
 	end
@@ -108,18 +52,21 @@ function handle_component_auth(session, stanza)
 	local supplied_token = t_concat(stanza);
 	local calculated_token = sha1(session.streamid..secret, true);
 	if supplied_token:lower() ~= calculated_token:lower() then
+		log("info", "Component for %s authentication failed", session.host);
 		session:close{ condition = "not-authorized", text = "Given token does not match calculated token" };
 		return;
 	end
 	
 	
 	-- Authenticated now
+	log("info", "Component authenticated: %s", session.host);
 	
 	-- If component not already created for this host, create one now
 	if not hosts[session.host].connected then
 		local send = session.send;
 		session.component_session = cm_register_component(session.host, function (_, data) return send(data); end);
 		hosts[session.host].connected = true;
+		log("info", "Component successfully registered");
 	else
 		log("error", "Multiple components bound to the same address, first one wins (TODO: Implement stanza distribution)");
 	end
@@ -129,96 +76,3 @@ function handle_component_auth(session, stanza)
 end
 
 module:add_handler("component", "handshake", xmlns_component, handle_component_auth);
-
---- Closing a component connection
-local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
-local function session_close(session, reason)
-	local log = session.log or log;
-	if session.conn then
-		if reason then
-			if type(reason) == "string" then -- assume stream error
-				log("info", "Disconnecting component, <stream:error> is: %s", reason);
-				session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
-			elseif type(reason) == "table" then
-				if reason.condition then
-					local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
-					if reason.text then
-						stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
-					end
-					if reason.extra then
-						stanza:add_child(reason.extra);
-					end
-					log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza));
-					session.send(stanza);
-				elseif reason.name then -- a stanza
-					log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason));
-					session.send(reason);
-				end
-			end
-		end
-		session.send("</stream:stream>");
-		session.conn.close();
-		component_listener.disconnect(session.conn, "stream error");
-	end
-end
-
---- Component connlistener
-function component_listener.listener(conn, data)
-	local session = sessions[conn];
-	if not session then
-		local _send = conn.write;
-		session = { type = "component", conn = conn, send = function (data) return _send(tostring(data)); end };
-		sessions[conn] = session;
-
-		-- Logging functions --
-		
-		local conn_name = "xep114-"..tostring(conn):match("[a-f0-9]+$");
-		session.log = logger.init(conn_name);
-		session.close = session_close;
-		
-		session.log("info", "Incoming XEP-0114 connection");
-		
-		local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
-		session.parser = parser;
-		
-		session.notopen = true;
-		
-		function session.data(conn, data)
-			local ok, err = parser:parse(data);
-			if ok then return; end
-			session:close("xml-not-well-formed");
-		end
-		
-		session.dispatch_stanza = stream_callbacks.handlestanza;
-		
-	end
-	if data then
-		session.data(conn, data);
-	end
-end
-	
-function component_listener.disconnect(conn, err)
-	local session = sessions[conn];
-	if session then
-		(session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err));
-		if session.host then
-			log("debug", "deregistering component");
-			cm_deregister_component(session.host);
-			hosts[session.host].connected = nil;
-		end
-		sessions[conn]  = nil;
-		session = nil;
-		collectgarbage("collect");
-	end
-end
-
-connlisteners.register('component', component_listener);
-
-module:add_event_hook("server-started", 
-	function ()
-		if _G.net_activate_ports then
-			_G.net_activate_ports("component", "component", {5437}, "tcp");
-		else
-			error("No net_activate_ports: Using an incompatible version of Prosody?");
-		end
-	end);