Changeset

--- a/mod_proxy65/proxy65/mod_proxy65.lua	Sun Oct 25 14:21:30 2009 +0100
+++ b/mod_proxy65/proxy65/mod_proxy65.lua	Mon Oct 26 23:25:29 2009 +0100
@@ -8,30 +8,140 @@
 	error("proxy65 should be loaded as a component, please see http://prosody.im/doc/components", 0);
 end
 
-local _host = module:get_host();
-local _name = "SOCKS5 Bytestreams Service";
 
 local jid_split = require "util.jid".split;
 local st = require "util.stanza";
-local register_component = require "core.componentmanager".register_component;
-local deregister_component = require "core.componentmanager".deregister_component;
+local component_register = require "core.componentmanager".register_component;
+local component_deregister = require "core.componentmanager".deregister_component;
 local configmanager = require "core.configmanager";
+local config_get = require "core.configmanager".get;
+local connlisteners_register = require "net.connlisteners".register;
+local connlisteners_deregister = require "net.connlisteners".deregister;
+local adns, dns = require "net.adns", require "net.dns";
+local add_task = require "util.timer".add_task;
+local max_dns_depth = config.get("*", "core", "dns_max_depth") or 3;
+local dns_timeout = config.get("*", "core", "dns_timeout") or 60;
 
 local replies_cache = {};
+local _host = module:get_host();
+local _name = "SOCKS5 Bytestreams Service";
+local _config = config_get(_host, "core", "proxy65");
+local connlistener = {registered=false};
+local sessions = {};
+local component;
 
---[[
-<iq type='result' 
-    from='streamhostproxy.example.net' 
-    to='initiator@example.com/foo' 
-    id='proxy_info'>
-  <query xmlns='http://jabber.org/protocol/disco#info'>
-    <identity category='proxy'
-              type='bytestreams'
-              name='SOCKS5 Bytestreams Service'/>
-    <feature var='http://jabber.org/protocol/bytestreams'/>
-  </query>
-</iq>
-]]--
+if _config == nil then
+	_config = {};
+end
+if _config.port == nil then
+	_config.port = 5000;
+end
+
+local function register()
+	connlistener = { default_port = _config.port; default_interface = _config.interface };
+	connlistener.registered = connlisteners_register('proxy65', connlistener);
+	if(connlistener.registered == false) then
+		error("Proxy65: Could not establish a connection listener. Check your configuration please.");
+	else
+		module:add_item("proxy65", {jid=_host, name=_name})
+		component = component_register(_host, function(origin, stanza)
+			local to_node, to_host, to_resource = jid_split(stanza.attr.to);
+			if to_node == nil then
+				local type = stanza.attr.type;
+				if type == "error" or type == "result" then return; end
+				if stanza.name == "iq" and type == "get" then
+					local xmlns = stanza.tags[1].attr.xmlns
+					if xmlns == "http://jabber.org/protocol/disco#info" then
+						origin.send(get_disco_info(stanza));
+						return true;
+					elseif xmlns == "http://jabber.org/protocol/disco#items" then
+						origin.send(get_disco_items(stanza));
+						return true;
+					elseif xmlns == "http://jabber.org/protocol/bytestreams" and stanza.tags[1].attr.sid ~= nil then
+						origin.send(get_stream_host(stanza));
+						return true;
+					end
+				end
+			end
+			return;
+		end);
+	end
+end
+
+local function getDefaultIP(host)
+	local handle;
+	handle = adns.lookup(function (reply)
+		handle = nil;
+
+		-- COMPAT: This is a compromise for all you CNAME-(ab)users :)
+		if not (reply and reply[#reply] and reply[#reply].a) then
+			local count = max_dns_depth;
+			reply = dns.peek(host, "CNAME", "IN");
+			while count > 0 and reply and reply[#reply] and not reply[#reply].a and reply[#reply].cname do
+				module:log("debug", "Looking up %s (DNS depth is %d)", tostring(reply[#reply].cname), count);
+				reply = dns.peek(reply[#reply].cname, "A", "IN") or dns.peek(reply[#reply].cname, "CNAME", "IN");
+				count = count - 1;
+			end
+		end
+		-- end of CNAME resolving
+
+		if reply and reply[#reply] and reply[#reply].a then
+			module:log("debug", "DNS reply for %s gives us %s", host, reply[#reply].a);
+			_config.interface = reply[#reply].a
+			return register();
+		else
+			module:log("debug", "DNS lookup failed to get a response for %s", host);
+			if host:find(".") ~= nil then
+				host = host:gsub("^[^%.]*%.", "");
+				if host:find(".") ~= nil then -- still one dot left?
+					return getDefaultIP(host);
+				end
+			end
+			error("Proxy65: Could not get an interface to bind to. Please configure one.");
+		end
+	end, host, "A", "IN");
+
+	-- Set handler for DNS timeout
+	add_task(dns_timeout, function ()
+		if handle then
+			adns.cancel(handle, true);
+		end
+	end);
+	return true;
+end
+
+if _config.interface ~= nil then
+	register();
+else
+	getDefaultIP(_host); -- try to DNS lookup module:host()
+end
+
+function new_session(conn)
+	local w = function(s) conn.write(s:gsub("\n", "\r\n")); end;
+	local session = { conn = conn;
+			send = function (t) w(tostring(t)); end;
+			print = function (t) w("| "..tostring(t).."\n"); end;
+			disconnect = function () conn.close(); end;
+			};
+	
+	return session;
+end
+
+function connlistener.listener(conn, data)
+	local session = sessions[conn];
+
+	if not session then
+		session = new_session(conn);
+		sessions[conn] = session;
+	end
+	if data then
+	end
+end
+
+function connlistener.disconnect(conn, err)
+
+end
+
 local function get_disco_info(stanza)
 	local reply = replies_cache.disco_info;
 	if reply == nil then
@@ -58,26 +168,12 @@
 	return reply;
 end
 
---[[
-<iq type='result' 
-    from='streamhostproxy.example.net' 
-    to='initiator@example.com/foo' 
-    id='discover'>
-  <query xmlns='http://jabber.org/protocol/bytestreams'>
-         sid='vxf9n471bn46'>
-    <streamhost 
-        jid='streamhostproxy.example.net' 
-        host='24.24.24.1' 
-        zeroconf='_jabber.bytestreams'/>
-  </query>
-</iq>
-]]--
 local function get_stream_host(stanza)
 	local reply = replies_cache.stream_host;
 	if reply == nil then
 		reply = st.iq({type="result", from=_host})
 			:query("http://jabber.org/protocol/bytestreams")
-			:tag("streamhost", {jid=_host, host="24.24.24.1", zeroconf="_jabber.bytestreams"}); -- TODO get the correct data
+			:tag("streamhost", {jid=_host, host=_config.interface, port=_config.port}); -- TODO get the correct data
 		replies_cache.stream_host = reply;
 	end
 	
@@ -88,29 +184,6 @@
 end
 
 module.unload = function()
-	deregister_component(_host);
-end
-
-module:add_item("proxy", {jid=_host, name=_name})
-
-component = register_component(_host, function(origin, stanza)
-	local to_node, to_host, to_resource = jid_split(stanza.attr.to);
-	if to_node == nil then
-		local type = stanza.attr.type;
-		if type == "error" or type == "result" then return; end
-		if stanza.name == "iq" and type == "get" then
-			local xmlns = stanza.tags[1].attr.xmlns
-			if xmlns == "http://jabber.org/protocol/disco#info" then
-				origin.send(get_disco_info(stanza));
-				return true;
-			elseif xmlns == "http://jabber.org/protocol/disco#items" then
-				origin.send(get_disco_items(stanza));
-				return true;
-			elseif xmlns == "http://jabber.org/protocol/bytestreams" and stanza.tags[1].attr.sid ~= nil then
-				origin.send(get_stream_host(stanza));
-				return true;
-			end
-		end
-	end
-	return;
-end);
\ No newline at end of file
+	component_deregister(_host);
+	connlisteners_deregister("proxy65");
+end
\ No newline at end of file