Diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_proxy65/mod_proxy65.lua	Mon Oct 26 23:32:53 2009 +0100
@@ -0,0 +1,189 @@
+-- Copyright (C) 2009 Thilo Cestonaro
+-- 
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+if module:get_host_type() ~= "component" then
+	error("proxy65 should be loaded as a component, please see http://prosody.im/doc/components", 0);
+end
+
+
+local jid_split = require "util.jid".split;
+local st = require "util.stanza";
+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;
+
+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
+	 	reply = st.iq({type='result', from=_host}):query("http://jabber.org/protocol/disco#info")
+			:tag("identity", {category='proxy', type='bytestreams', name=_name}):up()
+			:tag("feature", {var="http://jabber.org/protocol/bytestreams"});
+		replies_cache.disco_info = reply;
+	end
+
+	reply.attr.id = stanza.attr.id;
+	reply.attr.to = stanza.attr.from;
+	return reply;
+end
+
+local function get_disco_items(stanza)
+	local reply = replies_cache.disco_items;
+	if reply == nil then
+	 	reply = st.iq({type='result', from=_host}):query("http://jabber.org/protocol/disco#items");
+		replies_cache.disco_info = reply;
+	end
+	
+	reply.attr.id = stanza.attr.id;
+	reply.attr.to = stanza.attr.from;
+	return reply;
+end
+
+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=_config.interface, port=_config.port}); -- TODO get the correct data
+		replies_cache.stream_host = reply;
+	end
+	
+	reply.attr.id = stanza.attr.id;
+	reply.attr.to = stanza.attr.from;
+	reply.tags[1].attr.sid = stanza.tags[1].attr.sid;
+	return reply;
+end
+
+module.unload = function()
+	component_deregister(_host);
+	connlisteners_deregister("proxy65");
+end
\ No newline at end of file